EP1070670A1 - Diaphragm pump and container incorporating the same - Google Patents

Diaphragm pump and container incorporating the same Download PDF

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Publication number
EP1070670A1
EP1070670A1 EP00401998A EP00401998A EP1070670A1 EP 1070670 A1 EP1070670 A1 EP 1070670A1 EP 00401998 A EP00401998 A EP 00401998A EP 00401998 A EP00401998 A EP 00401998A EP 1070670 A1 EP1070670 A1 EP 1070670A1
Authority
EP
European Patent Office
Prior art keywords
membrane
pump according
central
pumping chamber
pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00401998A
Other languages
German (de)
French (fr)
Other versions
EP1070670B1 (en
Inventor
Philippe Bonningue
Alain Behar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LOreal SA
Original Assignee
LOreal SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LOreal SA filed Critical LOreal SA
Publication of EP1070670A1 publication Critical patent/EP1070670A1/en
Application granted granted Critical
Publication of EP1070670B1 publication Critical patent/EP1070670B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1001—Piston pumps
    • B05B11/1004—Piston pumps comprising a movable cylinder and a stationary piston
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1061—Pump priming means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1064—Pump inlet and outlet valve elements integrally formed of a deformable material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1073—Springs
    • B05B11/1076—Traction springs, e.g. stretchable sleeve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005—Components or details
    • B05B11/0037—Containers
    • B05B11/0039—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means
    • B05B11/0044—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means

Definitions

  • the present invention relates to a pump and a container containing a liquid, for example a cosmetic cream, equipped with such a pump.
  • a pump comprising a push button mounted to move on a support subject to the container the product to be dispensed, the push button comprising a central cylindrical duct of revolution, provided with radial openings at its lower end, the support defining around this duct an annular pumping chamber, of volume variable.
  • a membrane made of an elastomer is mounted on the support. This membrane has a symmetrical central part of revolution, in the form of sleeve open at its upper end and closed at its lower end. The central duct of the push button is inserted into the membrane until it takes press against the bottom of the sleeve. The membrane is a reminder elastic to return the push button to its initial position after the distribution of a dose of product.
  • the diaphragm plate on the central duct isolates the pumping chamber from the radial openings of the central duct to avoid re-entry of air into the pumping chamber.
  • Such a pump has the advantage of having only a small number of parts and therefore to be relatively inexpensive to manufacture.
  • the present invention aims to improve the reliability of the operation of a pump of the type defined above, namely comprising a movable member mounted at displacement relative to a support, the movable member comprising a conduit central office into which the product to be distributed enters through at least one opening, the support defining with the movable member, around said central duct, a pumping chamber of variable volume, this pump further comprising a membrane having a central part into which said central duct is inserted, the membrane being arranged so as to isolate the pumping chamber from the or said openings of the central duct when the volume of the pumping chamber increases and that product is sucked into it.
  • At least one of the central duct and the part central membrane has an annular boss capable of being applied from tightly, when the volume of the pumping chamber increases, on the other the central duct and the central part of the membrane, to isolate the pumping of the central duct opening (s).
  • the aforementioned boss ensures closure of the annular passage formed around the central duct between the pumping chamber and the opening (s) of the central duct during the aspiration phase.
  • the surface of the membrane which is applied to the central duct to ensure this closure is of small extent due to the presence of the boss, so that low air pressure in the pumping chamber can be enough to break the seal between the membrane and the central duct.
  • the invention makes it possible to reduce to a certain extent the influence of the module elasticity of the material constituting the membrane on the operation of the pump, so use a harder elastomer to reduce the prestressing of the membrane while retaining the desired spring effect.
  • the boss is made on the inner surface of the central part of the membrane.
  • the boss thus produced on the central part of the membrane is applied tightly, at least when the volume of the pumping chamber increases, on the central duct to isolate the pumping chamber from the opening (s) of the central duct.
  • the boss also applies at rest so waterproof on the central duct.
  • the boss is produced on the external surface of the central duct.
  • the boss When the boss is made on the inner surface of the membrane, advantageously produces on the central duct one or more reliefs in hollow or in projection, away from the boss when the movable member is in the high position and reaching the boss at the end of the driving part of the moving member, these reliefs being arranged to facilitate the creation at this time of a passage between the room pumping and the opening (s) of the central duct.
  • This or these reliefs are for example in the form of one or more ribs formed on the outer surface of the central duct.
  • the central part of the membrane comprises a bottom comprising an interior stud arranged to engage in the end bottom of the central duct.
  • Such a pad ensures relatively stable maintenance of the end lower part of the central part of the membrane on the lower end of the duct central.
  • the membrane has a flexible lip able, on the one hand, to isolate the pumping chamber from a source of product when the volume of said pumping chamber decreases and, on the other hand, to allow a re-entry of product into said pumping chamber when the volume of this last increases.
  • this flexible lip is connected to the part central part of the membrane by forming an annular groove open downwards, and the support has an inner skirt bearing at its upper end in the bottom of said groove to retain the membrane when the movable member is moved down to decrease the volume of the pumping chamber.
  • the aforementioned inner skirt has openings at its upper end whose height is less than that of the flexible lip, these openings allowing product to be drawn into the pumping chamber when the volume of the latter increases and the flexible lip moves away from the skirt interior.
  • the central part of the membrane is connects at its upper end to an annular part whose width and the thickness are chosen so as to improve the maintenance of the membrane when said central part is stretched.
  • the thickness of the abovementioned annular part, before mounting of the membrane in the pump is greater than or equal to the thickness of the membrane in its central part.
  • the abovementioned annular part is, before mounting the membrane in the pump, at least 1.5 times wider than thick, and preferably 2 times wider than thick.
  • one of the flexible lip and the inner skirt has a annular boss capable of being applied to the other of the flexible lip and of the skirt interior to isolate the pumping chamber from the interior of the container, when the volume of the pumping chamber decreases.
  • the flexible lip has on its surface interior an annular boss capable of being applied in a sealed manner on the skirt interior to isolate the pumping chamber from the product source at least when the volume of the pumping chamber decreases.
  • This annular boss advantageously applies at rest so waterproof on the inner skirt.
  • the flexible lip advantageously comprises, above this boss annular, a preferential deformation zone preferably constituted by a thinned area.
  • the inner skirt has a boss on its outer surface annular able to apply sealingly on the flexible lip to isolate the pumping chamber of the product source when the volume of the pumping decreases.
  • the height of the aforementioned flexible lip is greater than or equal to the height of the central part of the membrane, before the mounting of the latter in the pump.
  • the outer surface of the flexible lip has, in the vicinity of its upper end, a diverging conical portion when approaching the upper end of the membrane, this conical portion is connecting by a shoulder to an annular rib.
  • the inside diameter of the flexible lip is equal to manufacturing tolerances, to the outside diameter of the inside skirt.
  • the clearance between the flexible lip and the inner skirt is negative or zero; thus, the flexible lip is tightened slightly on the inner skirt.
  • the length of the central part of the diaphragm, after mounting in the pump is greater than or equal to 1.5 times its initial length before mounting in the pump, even greater than or equal to 2 times said initial length, or even greater than or equal to 3 times said initial length.
  • the length of the central part of the membrane is greater than or equal to 2 times the initial length of the membrane before mounting it on the pump, or even greater than or equal to 3 times said initial length, or even greater than or equal at 4 times said initial length.
  • At least one of the membrane and the conduit central is shaped to prevent formation, between the membrane and the duct central, of a tight annular zone preventing the product contained in the room pumping to flow through the central duct when the volume of the chamber pumping decreases.
  • At least one of the membrane and the central duct is shaped to bear against the other of the membrane and the central duct in predetermined locations on its periphery, at least during movement relative of the movable member and the support.
  • At least one of the membrane and of the central duct comprises reliefs against which the other of the membrane and the conduit comes to bear central, at least during the relative movement of the movable member and the support.
  • said reliefs are produced on the membrane in being preferably constituted by bosses equi-distributed around the axis of the central part of the membrane at its opening, these bosses preferably extending on the upper face of the membrane.
  • the support has a double lip sealing, sealingly applied to a tubular skirt of the member mobile, this tubular skirt being open downwards and extending around the duct central concentrically to the latter, this tubular skirt further delimiting radially outwards the pumping chamber.
  • the inner skirt of the support is part of an attachment on the rest of the support.
  • the central duct of the movable member is provided at its lower end with at least one radial opening.
  • the movable member constitutes a push button, the aforementioned central duct being made in one piece with a nozzle distribution.
  • the tubular skirt of the movable member slides inside a support guide skirt, forming with the interior skirt of the supports an annular groove open upwards, communicating by at least one air return orifice with the source of product, the tubular skirt of the movable member applying sealingly on said guide skirt when the movable member is at rest and the volume of the pumping chamber is maximum.
  • the membrane can be made of a nitrile elastomer or a silicone elastomer, for example, other materials which can of course be used.
  • the invention also relates to a container equipped with a pump such as defined above.
  • FIG. 1 a container 1 having a body 2 forming reservoir, of which only the upper end can be seen in the drawing, defining a neck 3 on which a support is snapped 4.
  • the support 4 guides in sliding, along an axis X, a push button 5 and used to mount a removable protective cover 6, covering the push button 5 before first use.
  • the support 4 comprises a sealing skirt 7 which is applied so waterproof on the inside surface of the neck 3.
  • the sealing skirt 7 is extended radially, on the one hand towards the outside by fixing lugs 8 snapped onto an annular bead 9 of the neck 3, and on the other hand inwards by a stepped wall 10 defining a nozzle 12 serving to the connection of a dip tube 13, partially shown in the drawing.
  • An outer skirt 15 and a guide skirt 16 are made in one holding by plastic molding with the sealing skirt 7, the tabs fixing 8 and the stepped wall 10.
  • the outer skirt 15 extends around the neck 3 of the container and has a shoulder 17 on which the protective cover 6 is supported.
  • the upper edge 18 of the outer skirt 15 retains the push button 5 at rest, as will be explained below.
  • the support 4 comprises an inner skirt 20 constituted by a part reported, having a shoulder lower end 21, forcibly engaged in the wall tier 10.
  • the internal skirt 20 has a substantially tapered upper end, provided with openings 22, as can be seen more particularly in the figures 2 and 3.
  • openings 22 are in the example described in the form of slots oriented along the X axis, extended downward by grooves 25 extending over the radially inner surface of the inner skirt 20 until a step 26.
  • a double annular sealing lip 24 is made in one piece with the inner skirt 20 on the outer side of the latter by molding of material plastic.
  • the push button 5 has an outer skirt 3U, provided with its lower end of teeth 31, the latter abutting against the edge upper 18 of the outer skirt 15 of the support 4 when the push button 5 is at rest in the high position, as shown in Figure 1.
  • the push button 5 has a central duct 32, of axis X, and a skirt tubular 33 concentric, defining around the central duct 32 a pumping 34 annular.
  • the outer skirt 30, the tubular skirt 33 and the central duct 32 are made in one piece by plastic molding with a tip distribution 35, communicating internally with the central duct 32.
  • the latter has, at its lower end, radial openings 36.
  • the lower end of the tubular skirt 33 forms a sealing lip 37, extending slightly radially outward, as shown more particularly in Figure 4.
  • the guide skirt 16 of the support 4 has in the lower part a slight annular withdrawal 41 on its radially inner surface.
  • the interior of the container is thus isolated from the ambient air, which is favorable to good conservation of the product.
  • An air intake orifice 42 is made in the bottom of this groove to allow air to re-enter the container as it is emptied latest.
  • the inner skirt 20 is used for mounting a membrane 50 having a part central unit 51 in the form of a sleeve, of axis X, open at its upper end and closed at its lower end by a bottom 52.
  • This central part 51 is extended radially outwards by a flexible annular lip 53, as can be seen more particularly in the figure 5.
  • This flexible lip 53 forms, by connecting with the central part 51, a annular groove 54 into which the inner skirt 20 is inserted at its end upper, until taking support by its free edge in the bottom of said groove.
  • the flexible lip 53 is made so as to slightly tighten the skirt interior 20.
  • the height of the flexible lip 53 is greater than that of the openings 22 and the flexible lip 53 is suitable for applying at rest in a sealed manner against the surface outside of the inner skirt 20, below the openings 22, as illustrated in the figure 1.
  • the flexible lip 53 has at its lower end and on its radially inner surface an annular boss 56, of semi-circular section, able to be applied by its top line on the inner skirt 20 at rest.
  • the flexible lip 53 has a thinner area 57 above of the boss 56, so as to facilitate the outward deformation of the part bottom of flexible lip 53 to allow boss 56 to move apart easily from the inner skirt 20 when the product contained in the container must win the pumping room.
  • the outer surface of the flexible lip 53 has, from its end lower, a lower portion 81 substantially cylindrical of revolution around the X axis, then a conical upper portion 82 diverging upwards, this portion conical 82 connecting by a shoulder 83 to an annular rib 84.
  • the membrane 50 comprises, at the opening of its central part 51, non-symmetrical reliefs of revolution around the X axis, namely in the example in particular bosses 55 whose function will be specified below.
  • these bosses 55 are three in number, being evenly distributed angularly around the X axis, as we can see on the figure 6.
  • Each of these bosses 55 protrudes from the radially inner surface of the central part 51 and extends radially outwards on the face upper part of the membrane 50 up to substantially above the groove 54.
  • Each of the bosses 55 further presents, when observed in section in a transverse section plane, a convex section towards the X axis, as shown in the figure 6.
  • the inner surface of the central part 51 of the membrane has a upper portion 70 slightly conical towards the bottom 52.
  • the bosses 55 extend over this conical portion 70.
  • the annular part 85 which joins the flexible lip 53 to the central part 51 is relatively wide and thick, which makes it possible to immobilize the end well upper part of the central part 51 relative to the inner skirt 20, when the part central 51 is stretched.
  • the annular part 85 is approximately two times wider than thick, outside the bosses 55.
  • the central part 51 of the membrane has on its inner surface a annular boss 58, of semicircular section.
  • This boss 58 is intended to be applied by a generator on the surface outside of the central duct 32 above the openings 36, when the push-button goes up, in order to close the passage between the pumping chamber 34 and inside the central duct 32.
  • the boss 58 has a radius of 0.25 mm, the thickness e of the wall constituting the central part 51 of the membrane being 0.55 mm.
  • the bottom 52 of the central part 51 of the membrane has a stud 59 on its upper face, intended to engage in the lower end of the central duct 32.
  • the central duct 32 is shown in broken lines in FIG. 5.
  • the outside diameter of the pad 59 corresponds to the inside diameter of the conduit central 32.
  • the stud 59 keeps the bottom 52 of the membrane fixed relative to the central duct 32.
  • the length of the central part 51 of the membrane is approximately 3 times the initial length l 0 of the central part 51, that is to say that l elongation reaches 200%.
  • the length l 0 measured between the bottom of the groove 54 and the upper face of the bottom 52 is approximately 3 mm and when the membrane is in place in the pump and the button pusher at rest as shown in FIG. 1, the length of the central part 51 is approximately 9 mm.
  • the length of the central part 51 reaches an elongation of 350%.
  • the length of the central part 51 is then, for the example considered, 13.5 mm, the stroke of the push button 5 down being 4.5 mm.
  • the central duct 32 of the push button 5 is inserted into the central part 51 of the membrane 50 until it bears, by its end lower, against the bottom 52 of the membrane 50 around the stud 59, as illustrated on Figure 1.
  • bosses 55 are then applied against the cylindrical surface of revolution of the central duct 32. However, it is not generally necessary that the bosses 55 are applied to the central duct 32 when the push button is resting.
  • the double sealing lip 24 is applied sealingly to the surface radially inner of the tubular skirt 33, whatever the upward movement or down from push button 5.
  • the boss 58 is applied by its apex to the central duct 32, which closes the passage between the pumping chamber 34 and the radial openings 36.
  • the flexible lip 53 comes to rest at rest by the annular boss 56 on the inner skirt 20, which closes the passage between the pumping chamber 34 and inside the container.
  • the central duct 32 advantageously comprises, as shown in the Figures 7 and 8, ribs 60 parallel to the axis X, whose lower ends 61 are distant from the annular boss 58, when the push button is in position high, by a distance corresponding to the push-in stroke.
  • ribs 60 are optional, but facilitate priming of the pump. as explained below.
  • the ribs 60 come into contact with the annular boss 58 at the end of the stroke. to push the push button to ensure that the annular boss 58 moves away well from the central duct 58, as illustrated in FIG. 12.
  • the support 4, the push button 5 and the membrane 50 constitute a pump the operation of which is as follows.
  • the central duct 32 drives down the bottom 52 of the membrane 50, which elastically deforms by stretching to accompany the movement down the central duct 32.
  • the pump is here assumed to be primed, i.e. the pumping chamber 34 is filled with product.
  • the product contained in the pumping chamber 34 is driven between the central duct 32 and the central part 51 of the membrane and reaches the radial openings 36 of the duct central 32, then the distribution nozzle 35.
  • the flexible lip 53 is applied sealingly by the annular boss 56 on the inner skirt 20 during the downward movement of the push button 5.
  • the sealing lip 37 of the tubular skirt 33 of the push button 5 ceases, when it reaches the annular withdrawal 41 after a certain driving stroke of the push button 5, to be applied in a sealed manner on the guide skirt 16, allowing communication between the inside of the container and the outside, by through the air intake orifice 42 and the clearance existing between the skirt guide 16 and the tubular skirt 33.
  • the bosses 55 between them provide passages for the product and prevent the formation of a sealed annular zone between the central duct 32 and the central part 51 of the membrane 50 which could not be overcome by the pressure of the product, so that the product can flow to the radial openings 36, the annular boss 58 which can deviate slightly from the central duct 32 under the effect product pressure.
  • the contact surface between the membrane 50 and the central duct 32 above radial openings 36 is due to the presence of the annular boss 58, relatively limited, which facilitates the creation of a passage to the openings radial 36.
  • the bosses 55 tend to keep the central duct 32 coaxial with the skirt inner 20 and to guarantee the attachment of the membrane to the inner skirt 20.
  • the annular boss 58 closes the passage between the radial openings 36 and the pumping chamber 34, and the depression created in the latter causes the flexible lip to move apart 53 of the inner skirt 20 and an arrival of product from the container.
  • the product reaches the pumping chamber 34 by circulating through the grooves 25 of the inner skirt 20 along the central part 51 of the membrane 50, in crossing the inner skirt 20 in favor of the openings 22, then bypassing the flexible lip 53 and going up on the outside of the latter, as illustrated on the figure 10.
  • bosses 55 can be replaced by the reliefs produced on the central duct.
  • the annular boss 58 can be removed and replaced alternatively by a annular boss 58 'made on the outer surface of the central duct 32, above radial openings 36, as illustrated in FIG. 13.
  • annular boss 56 can be removed as illustrated in FIG. 14 and replaced by an annular boss 56 ′ produced on the skirt interior 20, just below the openings 22, as shown in FIG. 15.

Landscapes

  • Reciprocating Pumps (AREA)
  • Closures For Containers (AREA)
  • Diaphragms And Bellows (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Display Devices Of Pinball Game Machines (AREA)

Abstract

The pump comprises a push button (5), movable relative to a support (4), having a central conduit (32) into which the product penetrates through an opening before being distributed. The support defines with the push button, around the central conduit, a variable volume pumping chamber (34). The pump also comprises a membrane (50) having a central part (51) into which the central conduit is inserted. The membrane is arranged so as to isolate the pumping chamber from the central conduit openings (36) when the pumping chamber volume increases and the product is sucked into it. An Independent claim is also included for the recipient equipped with pump.

Description

La présente invention concerne une pompe et un récipient contenant un liquide, par exemple une crème cosmétique, équipé d'une telle pompe.The present invention relates to a pump and a container containing a liquid, for example a cosmetic cream, equipped with such a pump.

On connaít par le brevet français 2.728.809 une pompe comportant un bouton-poussoir monté à déplacement sur un support assujetti au récipient contenant le produit à distribuer, le bouton-poussoir comprenant un conduit central cylindrique de révolution, pourvu d'ouvertures radiales à son extrémité inférieure, le support définissant autour de ce conduit une chambre de pompage annulaire, de volume variable. Une membrane réalisée dans un élastomère est montée sur le support. Cette membrane comporte une partie centrale symétrique de révolution, en forme de manchon ouvert à son extrémité supérieure et fermé à son extrémité inférieure. Le conduit central du bouton-poussoir est inséré dans la membrane jusqu'à prendre appui contre le fond du manchon. La membrane constitue un organe de rappel élastique permettant de ramener le bouton-poussoir dans sa position initiale après la distribution d'une dose de produit.We know from French patent 2,728,809 a pump comprising a push button mounted to move on a support subject to the container the product to be dispensed, the push button comprising a central cylindrical duct of revolution, provided with radial openings at its lower end, the support defining around this duct an annular pumping chamber, of volume variable. A membrane made of an elastomer is mounted on the support. This membrane has a symmetrical central part of revolution, in the form of sleeve open at its upper end and closed at its lower end. The central duct of the push button is inserted into the membrane until it takes press against the bottom of the sleeve. The membrane is a reminder elastic to return the push button to its initial position after the distribution of a dose of product.

Au cours du mouvement de retour du bouton-poussoir, la membrane se plaque sur le conduit central et isole la chambre de pompage des ouvertures radiales du conduit central afin d'éviter une rentrée d'air dans la chambre de pompage.During the return movement of the push button, the diaphragm plate on the central duct and isolates the pumping chamber from the radial openings of the central duct to avoid re-entry of air into the pumping chamber.

Une telle pompe présente l'avantage de ne comporter qu'un faible nombre de pièces et donc d'être relativement peu coûteuse à fabriquer.Such a pump has the advantage of having only a small number of parts and therefore to be relatively inexpensive to manufacture.

Toutefois, cette pompe connue n'offre pas entière satisfaction, la société déposante ayant constaté notamment des difficultés d'amorçage.However, this known pump does not offer complete satisfaction, the company Applicant having noted in particular initiation difficulties.

La présente invention vise à améliorer la fiabilité du fonctionnement d'une pompe du type défini plus haut, à savoir comportant un organe mobile monté à déplacement relativement à un support, l'organe mobile comportant un conduit central dans lequel le produit devant être distribué pénètre à la faveur d'au moins une ouverture, le support définissant avec l'organe mobile, autour dudit conduit central, une chambre de pompage de volume variable, cette pompe comportant en outre une membrane ayant une partie centrale dans laquelle est inséré ledit conduit central, la membrane étant agencée de manière à isoler la chambre de pompage de la ou desdites ouvertures du conduit central quand le volume de la chambre de pompage augmente et que du produit est aspiré dans cette dernière.The present invention aims to improve the reliability of the operation of a pump of the type defined above, namely comprising a movable member mounted at displacement relative to a support, the movable member comprising a conduit central office into which the product to be distributed enters through at least one opening, the support defining with the movable member, around said central duct, a pumping chamber of variable volume, this pump further comprising a membrane having a central part into which said central duct is inserted, the membrane being arranged so as to isolate the pumping chamber from the or said openings of the central duct when the volume of the pumping chamber increases and that product is sucked into it.

Elle y parvient par le fait que l'un au moins du conduit central et de la partie centrale de la membrane comporte un bossage annulaire apte à s'appliquer de manière étanche, lorsque le volume de la chambre de pompage augmente, sur l'autre du conduit central et de la partie centrale de la membrane, pour isoler la chambre de pompage de la ou des ouvertures du conduit central.It achieves this by the fact that at least one of the central duct and the part central membrane has an annular boss capable of being applied from tightly, when the volume of the pumping chamber increases, on the other the central duct and the central part of the membrane, to isolate the pumping of the central duct opening (s).

Autrement dit, le bossage précité assure une fermeture du passage annulaire formé autour du conduit central entre la chambre de pompage et la ou les ouvertures du conduit central en phase d'aspiration.In other words, the aforementioned boss ensures closure of the annular passage formed around the central duct between the pumping chamber and the opening (s) of the central duct during the aspiration phase.

La surface de la membrane qui s'applique sur le conduit central pour assurer cette fermeture est de faible étendue du fait de la présence du bossage, de sorte qu'une faible pression d'air dans la chambre de pompage peut suffire à rompre l'étanchéité entre la membrane et le conduit central.The surface of the membrane which is applied to the central duct to ensure this closure is of small extent due to the presence of the boss, so that low air pressure in the pumping chamber can be enough to break the seal between the membrane and the central duct.

L'amorçage de la pompe s'en trouve facilité.Priming of the pump is thereby facilitated.

Par ailleurs, il est d'une manière générale souhaitable d'utiliser pour réaliser la membrane un élastomère relativement dur, permettant d'obtenir une force de rappel relativement importante sans avoir à précontraindre outre mesure la membrane, l'inconvénient de trop précontraindre la membrane étant de risquer une rupture de la membrane à long terme.Furthermore, it is generally desirable to use to achieve the membrane a relatively hard elastomer, making it possible to obtain a restoring force relatively large without having to unduly prestress the membrane, the disadvantage of too much prestressing the membrane being to risk a rupture of the long term membrane.

Toutefois, l'utilisation d'un élastomère plus dur tend à accroítre les difficultés d'amorçage, car la membrane se déforme moins facilement.However, the use of a harder elastomer tends to increase the difficulties. because the membrane deforms less easily.

L'invention permet de réduire dans une certaine mesure l'influence du module d'élasticité du matériau constituant la membrane sur le fonctionnement de la pompe, donc d'utiliser un élastomère plus dur afin de réduire la précontrainte de la membrane tout en conservant l'effet ressort voulu.The invention makes it possible to reduce to a certain extent the influence of the module elasticity of the material constituting the membrane on the operation of the pump, so use a harder elastomer to reduce the prestressing of the membrane while retaining the desired spring effect.

De préférence, pour permettre une fabrication aisée par moulage de matière plastique, le bossage est réalisé sur la surface intérieure de la partie centrale de la membrane.Preferably, to allow easy manufacture by molding of material plastic, the boss is made on the inner surface of the central part of the membrane.

Le bossage ainsi réalisé sur la partie centrale de la membrane s'applique de manière étanche, au moins lorsque le volume de la chambre de pompage augmente, sur le conduit central pour isoler la chambre de pompage de la ou des ouvertures du conduit central.The boss thus produced on the central part of the membrane is applied tightly, at least when the volume of the pumping chamber increases, on the central duct to isolate the pumping chamber from the opening (s) of the central duct.

Avantageusement, le bossage s'applique également au repos de manière étanche sur le conduit central.Advantageously, the boss also applies at rest so waterproof on the central duct.

En variante, le bossage est réalisé sur la surface extérieure du conduit central.As a variant, the boss is produced on the external surface of the central duct.

Lorsque le bossage est réalisé sur la surface intérieure de la membrane, on réalise avantageusement sur le conduit central un ou plusieurs reliefs en creux ou en saillie, éloignés du bossage lorsque l'organe mobile est en position haute et atteignant le bossage en fin de course d'enfoncement de l'organe mobile, ces reliefs étant agencés de manière à faciliter la création à ce moment d'un passage entre la chambre de pompage et la ou les ouvertures du conduit central.When the boss is made on the inner surface of the membrane, advantageously produces on the central duct one or more reliefs in hollow or in projection, away from the boss when the movable member is in the high position and reaching the boss at the end of the driving part of the moving member, these reliefs being arranged to facilitate the creation at this time of a passage between the room pumping and the opening (s) of the central duct.

Ce ou ces reliefs se présentent par exemple sous la forme d'une ou plusieurs nervures réalisées sur la surface extérieure du conduit central.This or these reliefs are for example in the form of one or more ribs formed on the outer surface of the central duct.

Dans une réalisation particulière, la partie centrale de la membrane comporte un fond comprenant un plot intérieur agencé pour s'engager dans l'extrémité inférieure du conduit central.In a particular embodiment, the central part of the membrane comprises a bottom comprising an interior stud arranged to engage in the end bottom of the central duct.

Un tel plot permet d'assurer un maintien relativement stable de l'extrémité inférieure de la partie centrale de la membrane sur l'extrémité inférieure du conduit central.Such a pad ensures relatively stable maintenance of the end lower part of the central part of the membrane on the lower end of the duct central.

Dans une réalisation particulière, la membrane comporte une lèvre flexible apte, d'une part, à isoler la chambre de pompage d'une source de produit quand le volume de ladite chambre de pompage diminue et, d'autre part, à permettre une rentrée de produit dans ladite chambre de pompage lorsque le volume de cette dernière augmente.In a particular embodiment, the membrane has a flexible lip able, on the one hand, to isolate the pumping chamber from a source of product when the volume of said pumping chamber decreases and, on the other hand, to allow a re-entry of product into said pumping chamber when the volume of this last increases.

Dans une réalisation particulière, cette lèvre flexible se raccorde à la partie centrale de la membrane en formant une gorge annulaire ouverte vers le bas, et le support comporte une jupe intérieure venant en appui à son extrémité supérieure dans le fond de ladite gorge pour retenir la membrane lorsque l'organe mobile est déplacé vers le bas pour diminuer le volume de la chambre de pompage.In a particular embodiment, this flexible lip is connected to the part central part of the membrane by forming an annular groove open downwards, and the support has an inner skirt bearing at its upper end in the bottom of said groove to retain the membrane when the movable member is moved down to decrease the volume of the pumping chamber.

De préférence, la jupe intérieure précitée comporte des ouvertures à son extrémité supérieure dont la hauteur est inférieure à celle de la lèvre flexible, ces ouvertures permettant au produit d'être aspiré dans la chambre de pompage lorsque le volume de cette dernière augmente et que la lèvre flexible s'écarte de la jupe intérieure.Preferably, the aforementioned inner skirt has openings at its upper end whose height is less than that of the flexible lip, these openings allowing product to be drawn into the pumping chamber when the volume of the latter increases and the flexible lip moves away from the skirt interior.

Dans une réalisation particulière, la partie centrale de la membrane se raccorde à son extrémité supérieure à une partie annulaire dont la largeur et l'épaisseur sont choisies de manière à améliorer le maintien de la membrane lorsque ladite partie centrale est étirée.In a particular embodiment, the central part of the membrane is connects at its upper end to an annular part whose width and the thickness are chosen so as to improve the maintenance of the membrane when said central part is stretched.

De préférence, l'épaisseur de la partie annulaire précitée, avant le montage de la membrane dans la pompe, est supérieure ou égale à l'épaisseur de la membrane dans sa partie centrale.Preferably, the thickness of the abovementioned annular part, before mounting of the membrane in the pump is greater than or equal to the thickness of the membrane in its central part.

De préférence, la partie annulaire précitée est, avant le montage de la membrane dans la pompe, au moins 1,5 fois plus large qu'épaisse, et de préférence 2 fois plus large qu'épaisse.Preferably, the abovementioned annular part is, before mounting the membrane in the pump, at least 1.5 times wider than thick, and preferably 2 times wider than thick.

De préférence, l'une de la lèvre flexible et de la jupe intérieure comporte un bossage annulaire apte à s'appliquer sur l'autre de la lèvre flexible et de la jupe intérieure pour isoler la chambre de pompage de l'intérieur du récipient, lorsque le volume de la chambre de pompage diminue.Preferably, one of the flexible lip and the inner skirt has a annular boss capable of being applied to the other of the flexible lip and of the skirt interior to isolate the pumping chamber from the interior of the container, when the volume of the pumping chamber decreases.

Dans une réalisation particulière, la lèvre flexible comporte sur sa surface intérieure un bossage annulaire apte à s'appliquer de manière étanche sur la jupe intérieure pour isoler la chambre de pompage de la source de produit au moins quand le volume de la chambre de pompage diminue.In a particular embodiment, the flexible lip has on its surface interior an annular boss capable of being applied in a sealed manner on the skirt interior to isolate the pumping chamber from the product source at least when the volume of the pumping chamber decreases.

Ce bossage annulaire s'applique avantageusement au repos de manière étanche sur la jupe intérieure.This annular boss advantageously applies at rest so waterproof on the inner skirt.

La lèvre flexible comporte avantageusement, au-dessus de ce bossage annulaire, une zone de déformation préférentielle constituée de préférence par une zone amincie.The flexible lip advantageously comprises, above this boss annular, a preferential deformation zone preferably constituted by a thinned area.

En variante, la jupe intérieure comporte sur sa surface extérieure un bossage annulaire apte à s'appliquer de manière étanche sur la lèvre flexible pour isoler la chambre de pompage de la source de produit quand le volume de la chambre de pompage diminue. Alternatively, the inner skirt has a boss on its outer surface annular able to apply sealingly on the flexible lip to isolate the pumping chamber of the product source when the volume of the pumping decreases.

Dans une réalisation particulière, la hauteur de la lèvre flexible précitée est supérieure ou égale à la hauteur de la partie centrale de la membrane, avant le montage de cette dernière dans la pompe.In a particular embodiment, the height of the aforementioned flexible lip is greater than or equal to the height of the central part of the membrane, before the mounting of the latter in the pump.

Dans une réalisation particulière, la surface extérieure de la lèvre flexible présente, au voisinage de son extrémité supérieure, une portion conique divergeant en rapprochement de l'extrémité supérieure de la membrane, cette portion conique se raccordant par un épaulement à une nervure annulaire.In a particular embodiment, the outer surface of the flexible lip has, in the vicinity of its upper end, a diverging conical portion when approaching the upper end of the membrane, this conical portion is connecting by a shoulder to an annular rib.

De préférence, le diamètre intérieur de la lèvre flexible est égal, aux tolérances de fabrication près, au diamètre extérieur de la jupe intérieure.Preferably, the inside diameter of the flexible lip is equal to manufacturing tolerances, to the outside diameter of the inside skirt.

De préférence encore, le jeu entre la lèvre flexible et la jupe intérieure est négatif ou nul ; ainsi, la lèvre flexible est serrée légèrement sur la jupe intérieure.More preferably, the clearance between the flexible lip and the inner skirt is negative or zero; thus, the flexible lip is tightened slightly on the inner skirt.

Dans une réalisation particulière, lorsque l'organe mobile est au repos, la longueur de la partie centrale de la membrane, après montage dans la pompe, est supérieure ou égale à 1,5 fois sa longueur initiale avant le montage dans la pompe, voire supérieure ou égale à 2 fois ladite longueur initiale, voire encore supérieure ou égale à 3 fois ladite longueur initiale.In a particular embodiment, when the movable member is at rest, the length of the central part of the diaphragm, after mounting in the pump, is greater than or equal to 1.5 times its initial length before mounting in the pump, even greater than or equal to 2 times said initial length, or even greater than or equal to 3 times said initial length.

Dans une réalisation particulière, lorsque l'organe mobile est complètement enfoncé, la longueur de la partie centrale de la membrane est supérieure ou égale à 2 fois la longueur initiale de la membrane avant son montage sur la pompe, voire supérieure ou égale à 3 fois ladite longueur initiale, voire encore supérieure ou égale à 4 fois ladite longueur initiale.In a particular embodiment, when the movable member is completely pressed, the length of the central part of the membrane is greater than or equal to 2 times the initial length of the membrane before mounting it on the pump, or even greater than or equal to 3 times said initial length, or even greater than or equal at 4 times said initial length.

Dans une réalisation particulière, l'un au moins de la membrane et du conduit central est conformé pour prévenir la formation, entre la membrane et le conduit central, d'une zone annulaire étanche empêchant le produit contenu dans la chambre de pompage de s'écouler par le conduit central lorsque le volume de la chambre de pompage diminue.In a particular embodiment, at least one of the membrane and the conduit central is shaped to prevent formation, between the membrane and the duct central, of a tight annular zone preventing the product contained in the room pumping to flow through the central duct when the volume of the chamber pumping decreases.

De préférence, l'un au moins de la membrane et du conduit central est conformé pour venir en appui contre l'autre de la membrane et du conduit central en des emplacements prédéterminés de sa périphérie, au moins au cours du déplacement relatif de l'organe mobile et du support. Preferably at least one of the membrane and the central duct is shaped to bear against the other of the membrane and the central duct in predetermined locations on its periphery, at least during movement relative of the movable member and the support.

De préférence, l'un au moins de la membrane et du conduit central comporte des reliefs contre lesquels vient en appui l'autre de la membrane et du conduit central, au moins au cours du déplacement relatif de l'organe mobile et du support.Preferably, at least one of the membrane and of the central duct comprises reliefs against which the other of the membrane and the conduit comes to bear central, at least during the relative movement of the movable member and the support.

On garantit ainsi un fonctionnement fiable de la pompe, sans risque de blocage de l'organe mobile lorsque le volume de la chambre de pompage varie.This guarantees reliable operation of the pump, without risk of blocking of the movable member when the volume of the pumping chamber varies.

Les reliefs précités tendent en effet à empêcher tout blocage par la membrane de la circulation du produit provenant de la chambre de pompage vers la ou les ouvertures du conduit central par laquelle ou lesquelles pénètre le produit devant être distribué, lorsque le volume de la chambre de pompage diminue.The aforementioned reliefs tend in fact to prevent any blockage by the membrane the flow of product from the pumping chamber to the central duct openings through which the product is to be penetrated distributed, when the volume of the pumping chamber decreases.

Ces reliefs tendent également à maintenir le conduit central de l'organe mobile dans l'axe de la partie centrale de la membrane, ce qui est favorable à un fonctionnement satisfaisant de la pompe.These reliefs also tend to maintain the central duct of the organ movable in the axis of the central part of the membrane, which is favorable for a satisfactory pump operation.

Dans une réalisation préférée, lesdits reliefs sont réalisés sur la membrane en étant de préférence constitués par des bossages équi-répartis autour de l'axe de la partie centrale de la membrane au niveau de son ouverture, ces bossages se prolongeant de préférence sur la face supérieure de la membrane.In a preferred embodiment, said reliefs are produced on the membrane in being preferably constituted by bosses equi-distributed around the axis of the central part of the membrane at its opening, these bosses preferably extending on the upper face of the membrane.

Dans une réalisation particulière, le support comporte une double lèvre d'étanchéité, s'appliquant de manière étanche sur une jupe tubulaire de l'organe mobile, cette jupe tubulaire étant ouverte vers le bas et s'étendant autour du conduit central concentriquement à ce dernier, cette jupe tubulaire délimitant en outre radialement vers l'extérieur la chambre de pompage.In a particular embodiment, the support has a double lip sealing, sealingly applied to a tubular skirt of the member mobile, this tubular skirt being open downwards and extending around the duct central concentrically to the latter, this tubular skirt further delimiting radially outwards the pumping chamber.

Dans une réalisation particulière, la jupe intérieure du support fait partie d'une pièce rapportée sur le reste du support.In a particular embodiment, the inner skirt of the support is part of an attachment on the rest of the support.

Dans une réalisation préférée, le conduit central de l'organe mobile est pourvu, à son extrémité inférieure, d'au moins une ouverture radiale.In a preferred embodiment, the central duct of the movable member is provided at its lower end with at least one radial opening.

Dans une réalisation préférée, l'organe mobile constitue un bouton-poussoir, le conduit central précité étant réalisé d'un seul tenant avec un embout de distribution.In a preferred embodiment, the movable member constitutes a push button, the aforementioned central duct being made in one piece with a nozzle distribution.

Dans une réalisation particulière, la jupe tubulaire de l'organe mobile coulisse à l'intérieur d'une jupe de guidage du support, ménageant avec la jupe intérieure du support une gorge annulaire ouverte vers le haut, communiquant par au moins un orifice de reprise d'air avec la source de produit, la jupe tubulaire de l'organe mobile s'appliquant de manière étanche sur ladite jupe de guidage lorsque l'organe mobile est au repos et que le volume de la chambre de pompage est maximum.In a particular embodiment, the tubular skirt of the movable member slides inside a support guide skirt, forming with the interior skirt of the supports an annular groove open upwards, communicating by at least one air return orifice with the source of product, the tubular skirt of the movable member applying sealingly on said guide skirt when the movable member is at rest and the volume of the pumping chamber is maximum.

La membrane peut être, réalisée dans un élastomère de nitrile ou un élastomère de silicone, par exemple, d'autres matériaux pouvant bien entendu être utilisés.The membrane can be made of a nitrile elastomer or a silicone elastomer, for example, other materials which can of course be used.

L'invention a encore pour objet un récipient équipé d'une pompe telle que définie plus haut.The invention also relates to a container equipped with a pump such as defined above.

D'autres caractéristiques et avantages de la présente invention apparaítront à la lecture de la description détaillée qui va suivre, d'un exemple de réalisation non limitatif de l'invention et de variantes de mise en oeuvre, et à l'examen du dessin annexé, sur lequel :

  • la figure 1 est une vue schématique de la partie supérieure d'un récipient équipé d'une pompe conforme à l'invention,
  • les figures 2 et 3 représentent isolément la jupe intérieure du support,
  • la figure 4 représente isolément et partiellement, l'extrémité inférieure de la jupe tubulaire de l'organe mobile,
  • la figure 5 représente isolément, en coupe axiale schématique, la membrane destinée à équiper la pompe de la figure 1, avant son montage dans la pompe,
  • la figure 6 est une coupe selon le trait de coupe VI-VI de la figure 5,
  • la figure 7 représente de façon partielle et schématique le conduit central,
  • la figure 8 est une coupe transversale selon le trait de coupe VIII - XIII de la figure 7,
  • la figure 9 illustre le fonctionnement de la pompe lorsque l'on appuie sur le bouton-poussoir,
  • la figure 10 illustre le fonctionnement de la pompe lorsque l'on relâche le bouton-poussoir,
  • les figures 11 et 12 illustrent l'action d'un relief du conduit central sur le bossage de la membrane,
  • la figure 13 est une vue analogue à la figure 5, représentant une variante de réalisation de la membrane,
  • la figure 14 représente partiellement une variante de réalisation de la lèvre flexible, et
  • la figure 15 est une vue analogue à la figure 2, représentant une variante de réalisation de la jupe intérieure du support.
Other characteristics and advantages of the present invention will appear on reading the detailed description which follows, of a non-limiting exemplary embodiment of the invention and variant embodiments, and on examining the appended drawing , on which :
  • FIG. 1 is a schematic view of the upper part of a container fitted with a pump according to the invention,
  • FIGS. 2 and 3 represent the inner skirt of the support in isolation,
  • FIG. 4 represents, in isolation and partially, the lower end of the tubular skirt of the movable member,
  • FIG. 5 represents in isolation, in schematic axial section, the membrane intended to equip the pump of FIG. 1, before its mounting in the pump,
  • FIG. 6 is a section along the section line VI-VI of FIG. 5,
  • FIG. 7 partially and schematically represents the central duct,
  • FIG. 8 is a cross section along the section line VIII - XIII of FIG. 7,
  • FIG. 9 illustrates the operation of the pump when the push button is pressed,
  • FIG. 10 illustrates the operation of the pump when the push button is released,
  • FIGS. 11 and 12 illustrate the action of a relief of the central duct on the boss of the membrane,
  • FIG. 13 is a view similar to FIG. 5, showing an alternative embodiment of the membrane,
  • FIG. 14 partially represents an alternative embodiment of the flexible lip, and
  • Figure 15 is a view similar to Figure 2 showing an alternative embodiment of the inner skirt of the support.

On a représenté sur la figure 1 un récipient 1 comportant un corps 2 formant réservoir, dont on ne voit sur le dessin que l'extrémité supérieure, définissant un col 3 sur lequel est encliqueté un support 4.There is shown in Figure 1 a container 1 having a body 2 forming reservoir, of which only the upper end can be seen in the drawing, defining a neck 3 on which a support is snapped 4.

Le support 4 guide en coulissement, selon un axe X, un bouton-poussoir 5 et sert au montage d'un capot de protection amovible 6, couvrant le bouton-poussoir 5 avant la première utilisation.The support 4 guides in sliding, along an axis X, a push button 5 and used to mount a removable protective cover 6, covering the push button 5 before first use.

Le support 4 comporte une jupe d'étanchéité 7 s'appliquant de manière étanche sur la surface intérieure du col 3.The support 4 comprises a sealing skirt 7 which is applied so waterproof on the inside surface of the neck 3.

La jupe d'étanchéité 7 est prolongée radialement, d'une part vers l'extérieur par des pattes de fixation 8 encliquetées sur un bourrelet annulaire 9 du col 3, et d'autre part vers l'intérieur par une paroi étagée 10 définissant un embout 12 servant au raccordement d'un tube plongeur 13, partiellement représenté sur le dessin.The sealing skirt 7 is extended radially, on the one hand towards the outside by fixing lugs 8 snapped onto an annular bead 9 of the neck 3, and on the other hand inwards by a stepped wall 10 defining a nozzle 12 serving to the connection of a dip tube 13, partially shown in the drawing.

Une jupe extérieure 15 et une jupe de guidage 16 sont réalisées d'un seul tenant par moulage de matière plastique avec la jupe d'étanchéité 7, les pattes de fixation 8 et la paroi étagée 10.An outer skirt 15 and a guide skirt 16 are made in one holding by plastic molding with the sealing skirt 7, the tabs fixing 8 and the stepped wall 10.

La jupe extérieure 15 s'étend autour du col 3 du récipient et présente un épaulement 17 sur lequel prend appui le capot de protection 6.The outer skirt 15 extends around the neck 3 of the container and has a shoulder 17 on which the protective cover 6 is supported.

Le bord supérieur 18 de la jupe extérieure 15 retient le bouton-poussoir 5 au repos, comme cela sera précisé dans la suite.The upper edge 18 of the outer skirt 15 retains the push button 5 at rest, as will be explained below.

Le support 4 comporte une jupe intérieure 20 constituée par une pièce rapportée, ayant une extrémité inférieure 21 épaulée, engagée à force dans la paroi étagée 10.The support 4 comprises an inner skirt 20 constituted by a part reported, having a shoulder lower end 21, forcibly engaged in the wall tier 10.

La jupe intérieure 20 comporte une extrémité supérieure sensiblement effilée, pourvue d'ouvertures 22, comme on peut le voir plus particulièrement sur les figures 2 et 3. The internal skirt 20 has a substantially tapered upper end, provided with openings 22, as can be seen more particularly in the figures 2 and 3.

Ces ouvertures 22 se présentent dans l'exemple décrit sous la forme de fentes orientées suivant l'axe X, prolongées vers le bas par des rainures 25 s'étendant sur la surface radialement intérieure de la jupe intérieure 20 jusqu'à un décrochement 26.These openings 22 are in the example described in the form of slots oriented along the X axis, extended downward by grooves 25 extending over the radially inner surface of the inner skirt 20 until a step 26.

Une double lèvre d'étanchéité annulaire 24 est réalisée d'un seul tenant avec la jupe intérieure 20 du côté extérieur de cette dernière par moulage de matière plastique.A double annular sealing lip 24 is made in one piece with the inner skirt 20 on the outer side of the latter by molding of material plastic.

Le bouton-poussoir 5 comporte une jupe extérieure 3U, pourvue à son extrémité inférieure de dents 31, ces dernières venant en butée contre le bord supérieur 18 de la jupe extérieure 15 du support 4 lorsque le bouton-poussoir 5 est au repos en position haute, comme représenté sur la figure 1.The push button 5 has an outer skirt 3U, provided with its lower end of teeth 31, the latter abutting against the edge upper 18 of the outer skirt 15 of the support 4 when the push button 5 is at rest in the high position, as shown in Figure 1.

Le bouton-poussoir 5 comporte un conduit central 32, d'axe X, et une jupe tubulaire 33 concentrique, délimitant autour du conduit central 32 une chambre de pompage 34 annulaire.The push button 5 has a central duct 32, of axis X, and a skirt tubular 33 concentric, defining around the central duct 32 a pumping 34 annular.

La jupe extérieure 30, la jupe tubulaire 33 et le conduit central 32 sont réalisés d'un seul tenant par moulage de matière plastique avec un embout de distribution 35, communiquant intérieurement avec le conduit central 32.The outer skirt 30, the tubular skirt 33 and the central duct 32 are made in one piece by plastic molding with a tip distribution 35, communicating internally with the central duct 32.

Ce dernier comporte, à son extrémité inférieure, des ouvertures radiales 36.The latter has, at its lower end, radial openings 36.

L'extrémité inférieure de la jupe tubulaire 33 forme une lèvre d'étanchéité 37, s'étendant légèrement radialement vers l'extérieur, comme représenté plus particulièrement sur la figure 4.The lower end of the tubular skirt 33 forms a sealing lip 37, extending slightly radially outward, as shown more particularly in Figure 4.

La jupe de guidage 16 du support 4 présente en partie inférieure un léger retrait annulaire 41 sur sa surface radialement intérieure.The guide skirt 16 of the support 4 has in the lower part a slight annular withdrawal 41 on its radially inner surface.

Lorsque le bouton-poussoir 5 est en position haute, la lèvre d'étanchéité 37 s'applique de manière étanche sur la surface cylindrique de révolution 40 de la partie supérieure de la jupe de guidage 16, comme représenté sur la figure 1.When the push button 5 is in the high position, the sealing lip 37 applies tightly to the cylindrical surface of revolution 40 of the part upper part of the guide skirt 16, as shown in FIG. 1.

L'intérieur du récipient est ainsi isolé de l'air ambiant, ce qui est favorable à une bonne conservation du produit.The interior of the container is thus isolated from the ambient air, which is favorable to good conservation of the product.

Lorsque le bouton-poussoir 5 est enfoncé, la lèvre d'étanchéité 37 cesse de s'appliquer de façon étanche sur la jupe de guidage 16, du fait de l'existence du retrait annulaire 41, ce qui permet à la gorge formée entre les jupes intérieure 20 et de guidage 16 de communiquer avec l'extérieur. When the push button 5 is pressed, the sealing lip 37 ceases to apply tightly to the guide skirt 16, due to the existence of the annular withdrawal 41, which allows the groove formed between the inner skirts 20 and guide 16 to communicate with the outside.

Un orifice 42 de reprise d'air est réalisé dans le fond de cette gorge pour permettre à l'air de rentrer dans le récipient au fur et à mesure du vidage de ce dernier.An air intake orifice 42 is made in the bottom of this groove to allow air to re-enter the container as it is emptied latest.

La jupe intérieure 20 sert au montage d'une membrane 50 ayant une partie centrale 51 en forme de manchon, d'axe X, ouvert à son extrémité supérieure et fermé à son extrémité inférieure par un fond 52.The inner skirt 20 is used for mounting a membrane 50 having a part central unit 51 in the form of a sleeve, of axis X, open at its upper end and closed at its lower end by a bottom 52.

Cette partie centrale 51 est prolongée radialement vers l'extérieur par une lèvre annulaire flexible 53, comme on peut le voir plus particulièrement sur la figure 5.This central part 51 is extended radially outwards by a flexible annular lip 53, as can be seen more particularly in the figure 5.

Cette lèvre flexible 53 forme, en se raccordant avec la partie centrale 51, une gorge annulaire 54 dans laquelle est insérée la jupe intérieure 20 à son extrémité supérieure, jusqu'à prendre appui par son bord libre dans le fond de ladite gorge.This flexible lip 53 forms, by connecting with the central part 51, a annular groove 54 into which the inner skirt 20 is inserted at its end upper, until taking support by its free edge in the bottom of said groove.

La lèvre flexible 53 est réalisée de manière à serrer légèrement la jupe intérieure 20.The flexible lip 53 is made so as to slightly tighten the skirt interior 20.

La hauteur de la lèvre flexible 53 est supérieure à celle des ouvertures 22 et la lèvre flexible 53 est apte à s'appliquer au repos de manière étanche contre la surface extérieure de la jupe intérieure 20, en deçà des ouvertures 22, comme illustré sur la figure 1.The height of the flexible lip 53 is greater than that of the openings 22 and the flexible lip 53 is suitable for applying at rest in a sealed manner against the surface outside of the inner skirt 20, below the openings 22, as illustrated in the figure 1.

Plus particulièrement, dans l'exemple de réalisation décrit et comme on peut le voir sur la figure 5, la lèvre flexible 53 comporte à son extrémité inférieure et sur sa surface radialement intérieure un bossage annulaire 56, de section demi-circulaire, apte à s'appliquer par sa ligne de sommet sur la jupe intérieure 20 au repos.More particularly, in the embodiment described and as can be see in Figure 5, the flexible lip 53 has at its lower end and on its radially inner surface an annular boss 56, of semi-circular section, able to be applied by its top line on the inner skirt 20 at rest.

La lèvre flexible 53 présente une zone 57 de plus faible épaisseur au-dessus du bossage 56, de manière à faciliter la déformation vers l'extérieur de la partie inférieure de la lèvre flexible 53 afin de permettre au bossage 56 de s'écarter facilement de la jupe intérieure 20 lorsque le produit contenu dans le récipient doit gagner la chambre de pompage.The flexible lip 53 has a thinner area 57 above of the boss 56, so as to facilitate the outward deformation of the part bottom of flexible lip 53 to allow boss 56 to move apart easily from the inner skirt 20 when the product contained in the container must win the pumping room.

La surface extérieure de la lèvre flexible 53 présente, à partir de son extrémité inférieure, une portion inférieure 81 sensiblement cylindrique de révolution autour de l'axe X, puis une portion supérieure conique 82 divergeant vers le haut, cette portion conique 82 se raccordant par un épaulement 83 à une nervure annulaire 84. The outer surface of the flexible lip 53 has, from its end lower, a lower portion 81 substantially cylindrical of revolution around the X axis, then a conical upper portion 82 diverging upwards, this portion conical 82 connecting by a shoulder 83 to an annular rib 84.

La membrane 50 comporte, au niveau de l'ouverture de sa partie centrale 51, des reliefs non symétriques de révolution autour de l'axe X, à savoir dans l'exemple particulier des bossages 55 dont la fonction sera précisée plus loin.The membrane 50 comprises, at the opening of its central part 51, non-symmetrical reliefs of revolution around the X axis, namely in the example in particular bosses 55 whose function will be specified below.

Dans l'exemple de réalisation décrit, ces bossages 55 sont au nombre de trois, étant équi-répartis angulairement autour de l'axe X, comme on peut le voir sur la figure 6.In the embodiment described, these bosses 55 are three in number, being evenly distributed angularly around the X axis, as we can see on the figure 6.

Chacun de ces bossages 55 forme saillie sur la surface radialement intérieure de la partie centrale 51 et se prolonge radialement vers l'extérieur sur la face supérieure de la membrane 50 jusque sensiblement au-dessus de la gorge 54.Each of these bosses 55 protrudes from the radially inner surface of the central part 51 and extends radially outwards on the face upper part of the membrane 50 up to substantially above the groove 54.

Chacun des bossages 55 présente en outre, lorsque observé en section dans un plan de coupe transversal, une section convexe vers l'axe X, comme représenté sur la figure 6.Each of the bosses 55 further presents, when observed in section in a transverse section plane, a convex section towards the X axis, as shown in the figure 6.

La surface intérieure de la partie centrale 51 de la membrane présente une portion supérieure 70 légèrement conique en direction du fond 52.The inner surface of the central part 51 of the membrane has a upper portion 70 slightly conical towards the bottom 52.

Les bossages 55 s'étendent sur cette portion conique 70.The bosses 55 extend over this conical portion 70.

La partie annulaire 85 qui réunit la lèvre flexible 53 à la partie centrale 51 est relativement large et épaisse, ce qui permet de bien immobiliser l'extrémité supérieure de la partie centrale 51 par rapport à la jupe intérieure 20, lorsque la partie centrale 51 est étirée.The annular part 85 which joins the flexible lip 53 to the central part 51 is relatively wide and thick, which makes it possible to immobilize the end well upper part of the central part 51 relative to the inner skirt 20, when the part central 51 is stretched.

Dans l'exemple de réalisation décrit, la partie annulaire 85 est environ deux fois plus large qu'épaisse, en dehors des bossages 55.In the example of embodiment described, the annular part 85 is approximately two times wider than thick, outside the bosses 55.

La partie centrale 51 de la membrane comporte sur sa surface intérieure un bossage annulaire 58, de section demi-circulaire.The central part 51 of the membrane has on its inner surface a annular boss 58, of semicircular section.

Ce bossage 58 est destiné à s'appliquer par une génératrice sur la surface extérieure du conduit central 32 au-dessus des ouvertures 36, lorsque le bouton-poussoir remonte, afin de fermer le passage entre la chambre de pompage 34 et l'intérieur du conduit central 32.This boss 58 is intended to be applied by a generator on the surface outside of the central duct 32 above the openings 36, when the push-button goes up, in order to close the passage between the pumping chamber 34 and inside the central duct 32.

Dans l'exemple décrit, le bossage 58 a un rayon de 0,25 mm, l'épaisseur e de la paroi constituant la partie centrale 51 de la membrane étant de 0,55 mm.In the example described, the boss 58 has a radius of 0.25 mm, the thickness e of the wall constituting the central part 51 of the membrane being 0.55 mm.

Le fond 52 de la partie centrale 51 de la membrane comporte un plot 59 sur sa face supérieure, destiné à s'engager dans l'extrémité inférieure du conduit central 32. The bottom 52 of the central part 51 of the membrane has a stud 59 on its upper face, intended to engage in the lower end of the central duct 32.

On a représenté en trait discontinu sur la figure 5 le conduit central 32.The central duct 32 is shown in broken lines in FIG. 5.

Le diamètre extérieur du plot 59 correspond au diamètre intérieur du conduit central 32.The outside diameter of the pad 59 corresponds to the inside diameter of the conduit central 32.

Le plot 59 permet de maintenir le fond 52 de ia membrane fixe par rapport au conduit central 32.The stud 59 keeps the bottom 52 of the membrane fixed relative to the central duct 32.

Lorsque le bouton poussoir 5 est au repos, comme représenté sur la figure 1, la longueur de la partie centrale 51 de la membrane vaut environ 3 fois la longueur initiale l0 de la partie centrale 51, c'est-à-dire que l'allongement atteint 200 %.When the push button 5 is at rest, as shown in FIG. 1, the length of the central part 51 of the membrane is approximately 3 times the initial length l 0 of the central part 51, that is to say that l elongation reaches 200%.

A titre d'exemple, lorsque la membrane 50 est non montée, la longueur l0 mesurée entre le fond de la gorge 54 et la face supérieure du fond 52 vaut 3 mm environ et lorsque la membrane est en place dans la pompe et le bouton poussoir au repos comme représenté sur la figure 1, la longueur de la partie centrale 51 vaut 9 mm environ.By way of example, when the membrane 50 is not mounted, the length l 0 measured between the bottom of the groove 54 and the upper face of the bottom 52 is approximately 3 mm and when the membrane is in place in the pump and the button pusher at rest as shown in FIG. 1, the length of the central part 51 is approximately 9 mm.

Dans l'exemple décrit, en fin de course d'enfoncement du bouton poussoir 5, la longueur de la partie centrale 51 atteint un allongement de 350 %.In the example described, at the end of the push button 5 travel, the length of the central part 51 reaches an elongation of 350%.

La longueur de la partie centrale 51 vaut alors, pour l'exemple considéré, 13,5 mm, la course du bouton poussoir 5 vers le bas étant de 4,5 mm.The length of the central part 51 is then, for the example considered, 13.5 mm, the stroke of the push button 5 down being 4.5 mm.

Lors du montage, le conduit central 32 du bouton-poussoir 5 est inséré dans la partie centrale 51 de la membrane 50 jusqu'à prendre appui, par son extrémité inférieure, contre le fond 52 de la membrane 50 autour du plot 59, comme illustré sur la figure 1.During assembly, the central duct 32 of the push button 5 is inserted into the central part 51 of the membrane 50 until it bears, by its end lower, against the bottom 52 of the membrane 50 around the stud 59, as illustrated on Figure 1.

Les bossages 55 s'appliquent alors contre la surface cylindrique de révolution du conduit central 32. Il n'est toutefois pas nécessaire, d'une manière générale, que les bossages 55 s'appliquent sur le conduit central 32 lorsque le bouton-poussoir est au repos.The bosses 55 are then applied against the cylindrical surface of revolution of the central duct 32. However, it is not generally necessary that the bosses 55 are applied to the central duct 32 when the push button is resting.

Lorsque le bouton-poussoir 5 est au repos, la partie centrale 51 de la membrane 50 est tendue, de manière à maintenir les dents 31 en butée contre le bord supérieur 18 de la jupe extérieure 15.When the push button 5 is at rest, the central part 51 of the membrane 50 is tensioned, so as to keep the teeth 31 in abutment against the edge upper 18 of the outer skirt 15.

La double lèvre d'étanchéité 24 s'applique de manière étanche sur la surface radialement intérieure de la jupe tubulaire 33, quel que soit le mouvement ascendant ou descendant du bouton-poussoir 5. The double sealing lip 24 is applied sealingly to the surface radially inner of the tubular skirt 33, whatever the upward movement or down from push button 5.

Le bossage 58 s'applique par son sommet sur le conduit central 32, ce qui ferme le passage entre la chambre de pompage 34 et les ouvertures radiales 36.The boss 58 is applied by its apex to the central duct 32, which closes the passage between the pumping chamber 34 and the radial openings 36.

La lèvre flexible 53 vient, au repos, en appui par le bossage annulaire 56 sur la jupe intérieure 20, ce qui ferme le passage entre la chambre de pompage 34 et l'intérieur du récipient.The flexible lip 53 comes to rest at rest by the annular boss 56 on the inner skirt 20, which closes the passage between the pumping chamber 34 and inside the container.

Le conduit central 32 comporte avantageusement, comme représenté sur les figures 7 et 8, des nervures 60 parallèles à l'axe X, dont les extrémités inférieures 61 sont éloignées du bossage annulaire 58, lorsque le bouton-poussoir est en position haute, d'une distance correspondant à la course d'enfoncement du bouton-poussoir.The central duct 32 advantageously comprises, as shown in the Figures 7 and 8, ribs 60 parallel to the axis X, whose lower ends 61 are distant from the annular boss 58, when the push button is in position high, by a distance corresponding to the push-in stroke.

Ces nervures 60 sont facultatives, mais facilitent l'amorçage de la pompe comme expliqué ci-après.These ribs 60 are optional, but facilitate priming of the pump. as explained below.

Avant que le bouton-poussoir n'atteigne sa position basse, les extrémités inférieures 61 des nervures 60 se situent au-dessus du bossage annulaire 58, comme représenté sur la figure 11.Before the push button reaches its low position, the ends lower 61 of the ribs 60 are located above the annular boss 58, as shown in Figure 11.

Lorsque la pompe n'est pas amorcée, de l'air se trouve dans la chambre de pompage 34, qu'il convient d'éliminer.When the pump is not primed, there is air in the chamber pumping 34, which should be eliminated.

Les nervures 60 viennent au contact du bossage annulaire 58 en fin de course d'enfoncement du bouton-poussoir afin d'assurer que le bossage annulaire 58 s'écarte bien du conduit central 58, comme illustré sur la figure 12.The ribs 60 come into contact with the annular boss 58 at the end of the stroke. to push the push button to ensure that the annular boss 58 moves away well from the central duct 58, as illustrated in FIG. 12.

On évite ainsi le risque que la pression de l'air dans la chambre de pompage soit insuffisante pour provoquer la création d'un passage entre la chambre de pompage 34 et les ouvertures radiales 36.This avoids the risk that the air pressure in the pumping chamber is insufficient to cause the creation of a passage between the pumping 34 and the radial openings 36.

Le support 4, le bouton-poussoir 5 et la membrane 50 constituent une pompe dont le fonctionnement est le suivant.The support 4, the push button 5 and the membrane 50 constitute a pump the operation of which is as follows.

Lorsque l'utilisateur appuie sur le bouton-poussoir 5, comme illustré sur la figure 9, le conduit central 32 entraíne vers le bas le fond 52 de la membrane 50, laquelle se déforme de façon élastique en s'étirant pour accompagner le mouvement de descente du conduit central 32.When the user presses the push button 5, as illustrated in the FIG. 9, the central duct 32 drives down the bottom 52 of the membrane 50, which elastically deforms by stretching to accompany the movement down the central duct 32.

La pompe est ici supposée amorcée, c'est-à-dire que la chambre de pompage 34 est remplie de produit. The pump is here assumed to be primed, i.e. the pumping chamber 34 is filled with product.

Lors du mouvement de descente du bouton-poussoir 5, le produit contenu dans la chambre de pompage 34 se trouve chassé entre le conduit central 32 et la partie centrale 51 de la membrane et gagne les ouvertures radiales 36 du conduit central 32, puis l'embout de distribution 35.During the downward movement of the push button 5, the product contained in the pumping chamber 34 is driven between the central duct 32 and the central part 51 of the membrane and reaches the radial openings 36 of the duct central 32, then the distribution nozzle 35.

La lèvre flexible 53 s'applique de manière étanche par le bossage annulaire 56 sur la jupe intérieure 20 durant le mouvement de descente du bouton-poussoir 5.The flexible lip 53 is applied sealingly by the annular boss 56 on the inner skirt 20 during the downward movement of the push button 5.

La lèvre d'étanchéité 37 de la jupe tubulaire 33 du bouton-poussoir 5 cesse, lorsqu'elle atteint le retrait annulaire 41 après une certaine course d'enfoncement du bouton-poussoir 5, de s'appliquer de manière étanche sur la jupe de guidage 16, permettant une communication entre l'intérieur du récipient et l'extérieur, par l'intermédiaire de l'orifice de reprise d'air 42 et le jeu existant entre la jupe de guidage 16 et la jupe tubulaire 33.The sealing lip 37 of the tubular skirt 33 of the push button 5 ceases, when it reaches the annular withdrawal 41 after a certain driving stroke of the push button 5, to be applied in a sealed manner on the guide skirt 16, allowing communication between the inside of the container and the outside, by through the air intake orifice 42 and the clearance existing between the skirt guide 16 and the tubular skirt 33.

Les bossages 55 ménagent entre eux des passages pour le produit et empêchent la formation d'une zone annulaire étanche entre le conduit central 32 et la partie centrale 51 de la membrane 50 qui ne pourrait être vaincue par la pression du produit, de sorte que le produit peut circuler jusqu'aux ouvertures radiales 36, le bossage annulaire 58 pouvant s'écarter légèrement du conduit central 32 sous l'effet de la pression du produit.The bosses 55 between them provide passages for the product and prevent the formation of a sealed annular zone between the central duct 32 and the central part 51 of the membrane 50 which could not be overcome by the pressure of the product, so that the product can flow to the radial openings 36, the annular boss 58 which can deviate slightly from the central duct 32 under the effect product pressure.

La surface de contact entre la membrane 50 et le conduit central 32 au-dessus des ouvertures radiales 36 est du fait de la présence du bossage annulaire 58, relativement limitée, ce qui facilite la création d'un passage vers les ouvertures radiales 36.The contact surface between the membrane 50 and the central duct 32 above radial openings 36 is due to the presence of the annular boss 58, relatively limited, which facilitates the creation of a passage to the openings radial 36.

Les bossages 55 tendent à maintenir le conduit central 32 coaxial à la jupe intérieure 20 et à garantir l'accrochage de la membrane sur la jupe intérieure 20.The bosses 55 tend to keep the central duct 32 coaxial with the skirt inner 20 and to guarantee the attachment of the membrane to the inner skirt 20.

Lorsque l'utilisateur relâche le bouton-poussoir 5, celui-ci est rappelé vers le haut par la partie centrale 51 de la membrane, laquelle tend à reprendre sa forme initiale.When the user releases the push button 5, it is recalled towards the high by the central part 51 of the membrane, which tends to regain its shape initial.

Lors du mouvement de retour du bouton-poussoir 5, le bossage annulaire 58 ferme le passage entre les ouvertures radiales 36 et la chambre de pompage 34, et la dépression qui se crée dans cette dernière provoque l'écartement de la lèvre flexible 53 de la jupe intérieure 20 et une arrivée de produit en provenance du récipient. During the return movement of the push button 5, the annular boss 58 closes the passage between the radial openings 36 and the pumping chamber 34, and the depression created in the latter causes the flexible lip to move apart 53 of the inner skirt 20 and an arrival of product from the container.

Le déplacement du bossage annulaire 56 est facilité par l'existence de la zone amincie 57.The displacement of the annular boss 56 is facilitated by the existence of the zone thinned 57.

Le produit gagne la chambre de pompage 34 en circulant par les rainures 25 de la jupe intérieure 20 le long de la partie centrale 51 de la membrane 50, en traversant la jupe intérieure 20 à la faveur des ouvertures 22, puis en contournant la lèvre flexible 53 et en remontant à l'extérieur de cette dernière, comme illustré sur la figure 10.The product reaches the pumping chamber 34 by circulating through the grooves 25 of the inner skirt 20 along the central part 51 of the membrane 50, in crossing the inner skirt 20 in favor of the openings 22, then bypassing the flexible lip 53 and going up on the outside of the latter, as illustrated on the figure 10.

Alors que le bouton-poussoir 5 remonte, de l'air peut gagner le récipient par le jeu existant entre la jupe de guidage 16 et la jupe tubulaire 33 et par l'orifice de reprise d'air 42, jusqu'à ce que la lèvre d'étanchéité 37 s'applique à nouveau de manière étanche sur la jupe de guidage 16 lorsque le bouton-poussoir 5 arrive en position haute, comme expliqué plus haut.As the push button 5 goes up, air can gain the container by the clearance existing between the guide skirt 16 and the tubular skirt 33 and through the orifice air intake 42, until the sealing lip 37 again applies sealingly on the guide skirt 16 when the push button 5 arrives at high position, as explained above.

Bien entendu, l'invention n'est pas limitée à l'exemple de réalisation qui vient d'être décrit.Of course, the invention is not limited to the exemplary embodiment which has just been described.

En particulier, les bossages 55 peuvent être remplacés par les reliefs réalisés sur le conduit central.In particular, the bosses 55 can be replaced by the reliefs produced on the central duct.

On peut aussi donner aux nervures 60 une dimension leur permettant de remplir la même fonction que les bossages 55 lesquels peuvent alors être supprimés.We can also give the ribs 60 a dimension allowing them to perform the same function as the bosses 55 which can then be removed.

Le bossage annulaire 58 peut être supprimé et remplacé en variante par un bossage annulaire 58' réalisé sur la surface extérieure du conduit central 32, au-dessus des ouvertures radiales 36, comme illustré sur la figure 13.The annular boss 58 can be removed and replaced alternatively by a annular boss 58 'made on the outer surface of the central duct 32, above radial openings 36, as illustrated in FIG. 13.

De manière similaire, le bossage annulaire 56 peut être supprimé comme illustré sur la figure 14 et remplacé par un bossage annulaire 56' réalisé sur la jupe intérieure 20, juste en dessous des ouvertures 22, comme représenté sur la figure 15.Similarly, the annular boss 56 can be removed as illustrated in FIG. 14 and replaced by an annular boss 56 ′ produced on the skirt interior 20, just below the openings 22, as shown in FIG. 15.

Claims (32)

Pompe du type comportant un organe mobile monté à déplacement relativement à un support, l'organe mobile comportant un conduit central dans lequel le produit devant être distribué pénètre à la faveur d'au moins une ouverture, le support définissant avec l'organe mobile, autour dudit conduit central, une chambre de pompage de volume variable, cette pompe comportant en outre une membrane ayant une partie centrale dans laquelle est inséré ledit conduit central, la membrane étant agencée de manière à isoler la chambre de pompage de la ou desdites ouvertures du conduit central quand le volume de la chambre de pompage augmente et que du produit est aspiré dans cette dernière, pompe caractérisée par le fait que l'un au moins du conduit central (32) et de la partie centrale (51) de la membrane comporte un bossage annulaire (58 ; 58') apte à s'appliquer de manière étanche, lorsque le volume de la chambre de pompage (34) augmente, sur l'autre du conduit central et de la partie centrale de la membrane, pour isoler la chambre de pompage (34) de la ou des ouvertures (36) du conduit central (32).Pump of the type comprising a movable member mounted for displacement relative to a support, the movable member comprising a central duct in which the product to be distributed enters through at least one opening, the support defining with the movable member, around said central duct, a chamber variable volume pumping, this pump further comprising a membrane having a central part into which said central duct is inserted, the membrane being arranged to isolate the pumping chamber from said one or more central duct openings when the volume of the pumping chamber increases and that product is sucked into the latter, pump characterized in that one at least the central duct (32) and the central part (51) of the membrane comprises an annular boss (58; 58 ') capable of being applied in a sealed manner, when the volume of the pumping chamber (34) increases, on the other of the duct central and central part of the membrane, to isolate the pumping chamber (34) of the opening or openings (36) of the central duct (32). Pompe selon la revendication 1, caractérisée par le fait que la partie centrale de la membrane (51) comporte un bossage annulaire (58) s'appliquant de manière étanche, au repos et lorsque le volume de la chambre de pompage augmente, sur le conduit central (32) pour isoler la chambre de pompage (34) de la ou des ouvertures (36) du conduit central (32)Pump according to claim 1, characterized in that the part central membrane (51) has an annular boss (58) applying tightly, at rest and when the volume of the pumping chamber increases, on the central duct (32) to isolate the pumping chamber (34) from the one or more openings (36) in the central duct (32) Pompe selon la revendication précédente, caractérisée par le fait que le conduit central (32) comporte un ou plusieurs reliefs (60) en creux ou en saillie, éloignés dudit bossage (58) lorsque l'organe mobile est en position haute et atteignant le bossage (58) en fin de course d'enfoncement de l'organe mobile, ces reliefs étant agencés de manière à faciliter la création à ce moment d'un passage entre la chambre de pompage (34) et la ou les ouvertures (36) du conduit central (32).Pump according to the preceding claim, characterized in that that the central duct (32) comprises one or more reliefs (60) in hollow or in projection, distant from said boss (58) when the movable member is in the high position and reaching the boss (58) at the end of the driving member insertion stroke, these reliefs being arranged so as to facilitate the creation at this time of a passage between the pumping chamber (34) and the opening or openings (36) of the central duct (32). Pompe selon la revendication précédente, caractérisée par le fait que le ou lesdits reliefs se présentent sous la forme d'une ou plusieurs nervures (60) réalisées sur la surface extérieure du conduit central (32). Pump according to the preceding claim, characterized in that that the said relief (s) are in the form of one or more ribs (60) made on the outer surface of the central duct (32). Pompe selon la revendication précédente, caractérisée par le fait que la partie centrale de la membrane comporte un fond comprenant un plot intérieur (59) agencé pour s'engager dans l'extrémité inférieure du conduit central (32).Pump according to the preceding claim, characterized in that that the central part of the membrane has a bottom comprising an internal stud (59) arranged to engage in the lower end of the central duct (32). Pompe selon l'une quelconque des revendications précédentes, caractérisée par le fait que la membrane comporte une lèvre flexible (53) apte, d'une part à isoler la chambre de pompage (34) de la source de produit quand le volume de ladite chambre de pompage (34) diminue, et d'autre part, à permettre une rentrée de produit dans ladite chambre de pompage (34) lorsque le volume de cette dernière augmente.Pump according to any one of the preceding claims, characterized in that the membrane comprises a flexible lip (53) capable, of a part to isolate the pumping chamber (34) from the product source when the volume of said pumping chamber (34) decreases, and on the other hand, to allow a return of produced in said pumping chamber (34) when the volume of the latter increases. Pompe selon la revendication précédente, caractérisée par le fait que ladite lèvre flexible (53) se raccorde à la partie centrale (51) de la membrane (50) en formant une gorge annulaire (54) ouverte vers le bas, et par le fait que le support comporte une jupe intérieure (20) venant en appui à son extrémité supérieure dans le fond de ladite gorge (54) pour retenir la membrane lorsque l'organe mobile (5) est déplacé vers le bas pour diminuer le volume de la chambre de pompage (34).Pump according to the preceding claim, characterized in that that said flexible lip (53) is connected to the central part (51) of the membrane (50) by forming an annular groove (54) open downwards, and by the fact that the support has an inner skirt (20) bearing at its upper end in the bottom of said groove (54) for retaining the membrane when the movable member (5) is moved down to decrease the volume of the pumping chamber (34). Pompe selon la revendication précédente, caractérisée par le fait que l'une de la lèvre flexible et de la jupe intérieure comporte un bossage annulaire (56 ; 56') apte à s'appliquer sur l'autre de la lèvre flexible et de la jupe intérieure pour isoler la chambre de pompage de l'intérieur du récipient, lorsque le volume de la chambre de pompage diminue.Pump according to the preceding claim, characterized in that that one of the flexible lip and the inner skirt has an annular boss (56; 56 ') able to be applied to the other of the flexible lip and the inner skirt for isolate the pumping chamber from inside the container, when the volume of the pumping chamber decreases. Pompe selon la revendication précédente, caractérisée par le fait que la lèvre flexible comporte sur sa surface intérieure un bossage annulaire (56) apte à s'appliquer de manière étanche sur la jupe intérieure pour isoler la chambre de pompage de la source de produit au repos et quand le volume de la chambre de pompage diminue.Pump according to the preceding claim, characterized in that that the flexible lip has on its inner surface an annular boss (56) suitable to be applied tightly on the inner skirt to isolate the chamber from pumping of the product source at rest and when the volume of the pumping decreases. Pompe selon la revendication précédente, caractérisée par le fait que la lèvre flexible (53) comporte au-dessus de ce bossage (56) une zone de déformation préférentielle constituée de préférence par une zone amincie (57).Pump according to the preceding claim, characterized in that that the flexible lip (53) has above this boss (56) a zone of preferential deformation preferably consisting of a thinned zone (57). Pompe selon la revendication 8, caractérisée par le fait que la jupe intérieure (20) comporte sur la surface extérieure un bossage annulaire (56') apte à s'appliquer de manière étanche sur la lèvre flexible (53) pour isoler la chambre de pompage de la source de produit quand le volume de la chambre de pompage diminue.Pump according to claim 8, characterized in that the skirt inner (20) has on the outer surface an annular boss (56 ') capable of apply tightly to the flexible lip (53) to isolate the chamber pumping the product source when the volume of the pumping chamber decreases. Pompe selon l'une quelconque des revendications 7 à 11, caractérisée par le fait que la jupe intérieure (20) fait partie d'une pièce rapportée sur le reste du support.Pump according to any one of Claims 7 to 11, characterized in that the inner skirt (20) is part of an insert on the rest of the media. Pompe selon la revendication précédente, caractérisée par le fait que le support comporte une double lèvre d'étanchéité (24) s'appliquant de manière étanche sur une jupe tubulaire (33) de l'organe mobile, cette jupe tubulaire (33) étant ouverte vers le bas et s'étendant autour du conduit central (32) concentriquement à ce dernier, cette jupe tubulaire (33) délimitant en outre radialement vers l'extérieur la chambre de pompage (34).Pump according to the preceding claim, characterized in that that the support has a double sealing lip (24) which is applied so watertight on a tubular skirt (33) of the movable member, this tubular skirt (33) being open downward and extending around the central duct (32) concentrically with this last, this tubular skirt (33) further delimiting radially outward the pumping chamber (34). Pompe selon la revendication précédente, caractérisée par le fait que la jupe tubulaire (33) de l'organe mobile coulisse à l'intérieur d'une jupe guidage (16) du support, ménageant avec la jupe intérieure (20) du support une gorge annulaire ouverte vers le haut, communiquant au moins par un orifice de reprise d'air (42) avec la source de produit, la jupe tubulaire (33) de l'organe mobile s'appliquant de manière étanche sur ladite jupe de guidage (16) lorsque l'organe mobile est au repos et que le volume de la chambre de pompage (34) est maximum.Pump according to the preceding claim, characterized in that the tubular skirt (33) of the movable member slides inside a guide skirt (16) of the support, forming with the inner skirt (20) of the support a groove annular open upwards, communicating at least by an air intake orifice (42) with the source of product, the tubular skirt (33) of the movable member applying sealingly on said guide skirt (16) when the movable member is at rest and that the volume of the pumping chamber (34) is maximum. Pompe selon l'une quelconque des revendications 7 à 14, caractérisée par le fait que ladite jupe intérieure (20) comporte des ouvertures (22) à son extrémité supérieure, dont la hauteur est inférieure à celle de la lèvre flexible (53), ces ouvertures (22) permettant au produit de gagner la chambre de pompage (34) lorsque le volume de cette dernière augmente et que la lèvre flexible (53) s'écarte de la jupe intérieure (2()) sous l'effet de la poussée du produit s'écoulant vers la chambre de pompage (34).Pump according to any one of Claims 7 to 14, characterized in that said inner skirt (20) has openings (22) to its upper end, the height of which is less than that of the flexible lip (53), these openings (22) allowing the product to reach the pumping chamber (34) when the volume of the latter increases and the flexible lip (53) moves away from the inner skirt (2 ()) under the effect of the push of the product flowing towards the pumping chamber (34). Pompe selon l'une quelconque des revendications 7 à 15, caractérisée par le fait que la hauteur de la lèvre flexible (53) est supérieure ou égale à la hauteur de la partie centrale (51) de la membrane, avant le montage de cette dernière dans la pompe. Pump according to any one of Claims 7 to 15, characterized in that the height of the flexible lip (53) is greater than or equal at the level of the central part (51) of the membrane, before mounting this last in the pump. Pompe selon l'une quelconque des revendications 7 à 16, caractérisée par le fait que la lèvre flexible (53) est d'épaisseur croissante en se rapprochant de l'extrémité supérieure de la membrane.Pump according to any one of Claims 7 to 16, characterized in that the flexible lip (53) is of increasing thickness while closer to the upper end of the membrane. Pompe selon l'une quelconque des revendications 7 à 17, caractérisée par le fait que le diamètre intérieur de la lèvre flexible (53) est égal, aux tolérances de fabrication près, au diamètre extérieur de la jupe intérieure (20).Pump according to any one of claims 7 to 17, characterized in that the inside diameter of the flexible lip (53) is equal to manufacturing tolerances, to the outside diameter of the inside skirt (20). Pompe selon la revendication précédente, caractérisée par le fait que le jeu entre la lèvre flexible (53) et la jupe intérieure (20) est négatif ou nul.Pump according to the preceding claim, characterized in that that the play between the flexible lip (53) and the inner skirt (20) is negative or zero. Pompe selon l'une quelconque des revendications précédentes, caractérisée par le fait que la partie centrale (51) de la membrane (50) se raccorde à son extrémité supérieure à une partie annulaire (85) dont la largeur et l'épaisseur sont choisies de manière à améliorer le maintien de la membrane lorsque ladite partie centrale (51) est étirée.Pump according to any one of the preceding claims, characterized in that the central part (51) of the membrane (50) is connected to its upper end to an annular part (85) whose width and thickness are chosen so as to improve the maintenance of the membrane when said part central (51) is stretched. Pompe selon la revendication précédente, caractérisée par le fait que l'épaisseur de ladite partie annulaire (85), avant le montage de la membrane (50) dans la pompe, est supérieure ou égale à l'épaisseur de la membrane dans sa partie centrale.Pump according to the preceding claim, characterized in that that the thickness of said annular part (85), before mounting the membrane (50) in the pump, is greater than or equal to the thickness of the membrane in its part central. Pompe selon l'une des deux revendications précédentes, caractérisée par le fait que ladite partie annulaire (85) est, avant le montage de la membrane (50) dans la pompe, au moins 1,5 fois plus large qu'épaisse, et de préférence 2 fois plus large qu'épaisse.Pump according to one of the two preceding claims, characterized in that said annular part (85) is, before mounting the membrane (50) in the pump, at least 1.5 times wider than thick, and preferably 2 times wider than thick. Pompe selon l'une quelconque des revendications précédentes, caractérisée par le fait que lorsque l'organe mobile (5) est au repos, la longueur de la partie centrale de la membrane après montage dans la pompe est supérieure ou égale à 1,5 fois sa longueur initiale (l0) avant le montage dans la pompe, voire supérieure ou égale à 2 fois ladite longueur initiale et voire encore supérieure ou égale à 3 fois ladite longueur initiale.Pump according to any one of the preceding claims, characterized in that when the movable member (5) is at rest, the length of the central part of the membrane after mounting in the pump is greater than or equal to 1.5 times its initial length (l 0 ) before mounting in the pump, or even greater than or equal to 2 times said initial length and even more than or equal to 3 times said initial length. Pompe selon l'une quelconque des revendications précédentes, caractérisée par le fait que lorsque l'organe mobile est complètement enfoncé, la longueur dc la partie centrale (51) de la membrane est supérieure ou égale à 2 fois la longueur initiale (l0) de la membrane avant son montage sur la pompe, voire supérieure ou égale à 3 fois ladite longueur initiale et voire encore supérieure ou égale à 4 fois ladite longueur initiale.Pump according to any one of the preceding claims, characterized in that when the movable member is fully depressed, the length dc of the central part (51) of the membrane is greater than or equal to 2 times the initial length (l 0 ) of the membrane before it is mounted on the pump, or even greater than or equal to 3 times said initial length and even more than or equal to 4 times said initial length. Pompe selon l'une quelconque des revendications précédentes, caractérisée par le fait que l'un au moins de la membrane et du conduit central (32) est conformé pour prévenir la formation entre la membrane et le conduit central d'une zone annulaire empêchant le produit contenu dans la chambre de pompage de s'écouler par ledit conduit central (32) lorsque le volume de la chambre de pompage diminue.Pump according to any one of the preceding claims, characterized in that at least one of the membrane and the central duct (32) is shaped to prevent the formation between the membrane and the central duct of a annular zone preventing the product contained in the pumping chamber from flow through said central conduit (32) when the volume of the pumping chamber decreases. Pompe selon la revendication précédente, caractérisée par le fait que l'un au moins de la membrane et du conduit central est conformé pour venir en appui contre l'autre de la membrane et du conduit central en des emplacements prédéterminés de sa périphérie, au moins au cours du déplacement relatif de l'organe mobile et du support.Pump according to the preceding claim, characterized in that that at least one of the membrane and the central duct is shaped to come into support against the other of the membrane and the central duct in locations predetermined from its periphery, at least during the relative displacement of the organ mobile and support. Pompe selon la revendication précédente, caractérisée par le fait que l'un au moins de la membrane et du conduit central comporte des reliefs contre lesquels vient en appui l'autre de la membrane et du conduit central, au moins au cours du déplacement relatif de l'organe mobile et du support.Pump according to the preceding claim, characterized in that that at least one of the membrane and the central duct has reliefs against which supports the other of the membrane and the central duct, at least at during the relative movement of the movable member and the support. Pompe selon la revendication précédente, caractérisée par le fait que lesdits reliefs sont réalisés sur la membrane en étant de préférence constitués par des bossages (55) équi-répartis autour de l'axe (X) de la partie centrale (51) de la membrane au niveau de son ouverture, ces bossages (55) se prolongeant sur la face supérieure de la membrane.Pump according to the preceding claim, characterized in that that said reliefs are produced on the membrane, preferably being constituted by bosses (55) equi-distributed around the axis (X) of the central part (51) of the membrane at its opening, these bosses (55) extending on the face upper membrane. Pompe selon l'une quelconque des revendications précédentes, caractérisée par le fait que le conduit central (32) de l'organe mobile est pourvu, à son extrémité inférieure, d'au moins une ouverture radiale (36).Pump according to any one of the preceding claims, characterized in that the central duct (32) of the movable member is provided, at its lower end, at least one radial opening (36). Pompe selon l'une quelconque des revendications précédentes, caractérisée par le fait que l'organe mobile constitue un bouton-poussoir, le conduit central (32) étant réalisé d'un seul tenant avec un embout de distribution (35).Pump according to any one of the preceding claims, characterized in that the movable member constitutes a push button, the conduit central (32) being made in one piece with a dispensing nozzle (35). Pompe selon l'une quelconque des revendications précédentes, caractérisée par le fait que la membrane est réalisée dans un élastomère de nitrile ou un élastomère de silicone. Pump according to any one of the preceding claims, characterized by the fact that the membrane is made of a nitrile elastomer or a silicone elastomer. Récipient équipé d'une pompe tel que définie dans l'une quelconque des revendications précédentes.Container fitted with a pump as defined in any one of the preceding claims.
EP00401998A 1999-07-19 2000-07-11 Diaphragm pump and container incorporating the same Expired - Lifetime EP1070670B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9909331 1999-07-19
FR9909331A FR2796672B1 (en) 1999-07-19 1999-07-19 MEMBRANE PUMP WITH ANNULAR SEALING, AND CONTAINER THUS EQUIPPED

Publications (2)

Publication Number Publication Date
EP1070670A1 true EP1070670A1 (en) 2001-01-24
EP1070670B1 EP1070670B1 (en) 2004-12-29

Family

ID=9548249

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00401998A Expired - Lifetime EP1070670B1 (en) 1999-07-19 2000-07-11 Diaphragm pump and container incorporating the same

Country Status (8)

Country Link
US (1) US6305581B1 (en)
EP (1) EP1070670B1 (en)
JP (1) JP3613329B2 (en)
AT (1) ATE285952T1 (en)
CA (1) CA2314824A1 (en)
DE (1) DE60017022T2 (en)
ES (1) ES2233307T3 (en)
FR (1) FR2796672B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1262241A1 (en) * 2001-05-31 2002-12-04 L'oreal Diaphragm pump and container incorporating the same

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6779689B2 (en) * 2003-01-21 2004-08-24 Unilever Home & Personal Care Usa, Division Of Conopco, Inc. Ovaloid dispensing container
FR2852302B1 (en) * 2003-03-13 2006-07-14 Valois Sas FLUID PRODUCT DISPENSING MEMBER AND FLUID PRODUCT DISPENSING DEVICE COMPRISING SUCH AN ORGAN
US7614528B2 (en) * 2005-09-05 2009-11-10 Barflex Corporation Liquid dispensing apparatus capable of regulating discharged amount of liquid
FR2989598B1 (en) * 2012-04-24 2016-01-01 Lablabo DEVICE FOR PACKAGING AND DISPENSING FLUID PRODUCTS WITH A MANUAL PUMP.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2728809A1 (en) * 1995-01-04 1996-07-05 Daniel Crosnier DOSING DEVICE ADAPTABLE TO VARIOUS CONTAINERS

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2717447B1 (en) * 1994-03-21 1996-05-31 Labcatal Dosing device intended to deliver constant unit doses.
FR2732950B1 (en) * 1995-04-13 1997-07-04 Sofab DEVICE FOR PACKAGING AND DISPENSING A LIQUID OR PASTY PRODUCT

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2728809A1 (en) * 1995-01-04 1996-07-05 Daniel Crosnier DOSING DEVICE ADAPTABLE TO VARIOUS CONTAINERS

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1262241A1 (en) * 2001-05-31 2002-12-04 L'oreal Diaphragm pump and container incorporating the same
FR2825418A1 (en) * 2001-05-31 2002-12-06 Oreal MEMBRANE PUMP AND CONTAINER THUS EQUIPPED
US6978913B2 (en) 2001-05-31 2005-12-27 L'oreal S.A. Membrane pump and container equipped therewih

Also Published As

Publication number Publication date
DE60017022D1 (en) 2005-02-03
JP2001107869A (en) 2001-04-17
CA2314824A1 (en) 2001-01-19
EP1070670B1 (en) 2004-12-29
FR2796672A1 (en) 2001-01-26
US6305581B1 (en) 2001-10-23
ATE285952T1 (en) 2005-01-15
DE60017022T2 (en) 2006-01-12
ES2233307T3 (en) 2005-06-16
JP3613329B2 (en) 2005-01-26
FR2796672B1 (en) 2001-10-12

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