EP1125638B1 - Pump comprising a movable part with a central duct and with a membrane hooked on the central duct, and container with the same - Google Patents

Pump comprising a movable part with a central duct and with a membrane hooked on the central duct, and container with the same Download PDF

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Publication number
EP1125638B1
EP1125638B1 EP01400384A EP01400384A EP1125638B1 EP 1125638 B1 EP1125638 B1 EP 1125638B1 EP 01400384 A EP01400384 A EP 01400384A EP 01400384 A EP01400384 A EP 01400384A EP 1125638 B1 EP1125638 B1 EP 1125638B1
Authority
EP
European Patent Office
Prior art keywords
diaphragm
central duct
fact
pump
pump according
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.)
Expired - Lifetime
Application number
EP01400384A
Other languages
German (de)
French (fr)
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EP1125638A1 (en
Inventor
Philippe Bonningue
Gilles Baudin
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
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Filing date
Publication date
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Publication of EP1125638A1 publication Critical patent/EP1125638A1/en
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Publication of EP1125638B1 publication Critical patent/EP1125638B1/en
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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
    • 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
    • B05B11/0062—Outlet valves actuated by the pressure of the fluid to be sprayed
    • B05B11/007—Outlet valves actuated by the pressure of the fluid to be sprayed being opened by deformation of a sealing element made of resiliently deformable material, e.g. flaps, skirts, duck-bill valves
    • 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
    • B05B11/1064—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

Definitions

  • the present invention relates to a pump and a container containing a liquid, for example a cosmetic or care cream, equipped with such a pump.
  • a pump comprising a push button mounted to move on a support subject to the container containing the product to be dispensed, this push button comprising a central duct provided with a radial opening at its lower end, the support defining around this conduit central a variable volume pumping chamber.
  • a membrane made in a elastomeric material is mounted on the support. This membrane has a part sleeve-shaped central unit open at its upper end and closed at its end lower. The central conduit of the push button is inserted into the membrane by a end until pressing against the bottom of the central part of the membrane.
  • the aforementioned membrane plays the function of a spring by bringing back the push button in its initial position after dispensing a dose of product.
  • the membrane is pressed onto the central duct and isolates the pumping chamber from the radial opening 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 pump may be difficult to prime and in some cases the product circulates with difficulty between the central duct of the push button and the membrane, which can cause a blockage of the push button.
  • the invention aims to further improve a pump of the type comprising a movable member mounted to move relative to a support, this movable member comprising a central duct into which the product to be dispensed enters at the favor of at least one opening, the support defining with the movable member, around said central duct, a pumping chamber of variable volume, the pump comprising a membrane held by retaining means on the support, this membrane having a central part into which the central duct is inserted at one end, the membrane comprising a valve part, arranged so as to isolate the chamber pumping said opening (s) of the central duct when the volume of the pumping chamber increases and as product is sucked into it, the membrane further bearing on the movable member so that the displacement of the latter to dispense product produces an elastic stretch of the membrane.
  • the new pump according to the invention is characterized in that it comprises means suitable during movement of the movable member to distribute product to minimize stretching of the valve portion of the membrane.
  • the central part of the membrane comprises first attachment means arranged to cooperate with second attachment means integral with the duct central, these second attachment means being spaced from the end of the conduit by which the conduit is inserted in the central part of the membrane.
  • the end of the central duct bears only weakly or not at all on the bottom of the central part of the membrane when the movable member is moved to dispense product, unlike the pump described in the patent French 2,728,809, in which the elastic stretching of the membrane is due to the fact that the central duct of the push button presses directly against the bottom of the part central sleeve-shaped membrane.
  • the portion of the membrane extending between the means of support retainer and the attachment zone on the central duct only exerts a spring function.
  • the part of the membrane forming a valve, arranged to isolate the pumping chamber from the opening (s) of the central duct is located outside the portion of the membrane extending between the area of attachment to the support and the attachment area on the central duct.
  • the central part of the membrane bears on the central duct at a location remote from the end of the latter, which allows reduce the mechanical stresses to which the bottom of the part is subjected membrane center.
  • the bottom of the central part of the membrane is less mechanically stressed, it becomes easier to play the membrane its function of discharge valve, i.e. allowing it to isolate the pumping chamber from the or openings in the central duct when the volume of the pumping chamber increases and that product is sucked into it.
  • the lower part of the central part of the membrane can deform more easily in a direction perpendicular to the direction of stretching of the upper part of the central part of the membrane, due to that it is subjected to less axial stresses, and the passage of the product to be distributed is thus facilitated.
  • the first means of attachment of the membrane form an open groove in the opposite direction to the bottom of the part central of the membrane and the second attachment means comprise a skirt attachment directed towards the end of the central duct.
  • the aforementioned groove is formed between two concentric tubular walls, respectively constituting the lower part and the upper part of the central part of the membrane, partially overlapping and joined by a transverse wall constituting the bottom of said groove.
  • the tubular wall forming the lower part of the part central of the membrane comprises, on its radially inner surface, at least one and preferably several axial channels.
  • the above-mentioned axial channels extend downwards from the upper end of the tubular wall forming the lower part of the part center of the membrane, up to substantially below the above transverse wall.
  • the membrane is arranged to isolate the chamber from pumping of the opening (s) of the central duct by applying through a region annular, sealingly, on an area of the central duct located under the second attachment means.
  • This area of the central duct on which the membrane is applied when the volume of the pumping chamber increases and as product is drawn into this the latter is advantageously defined by an annular boss.
  • the household membrane then with the central duct an annular clearance on either side of said boss, which facilitates the flow of the product during its distribution.
  • the lower part of the central duct has at least one radial opening.
  • the lower part of the central duct has no radial opening, which facilitates its manufacture.
  • the second means for hooking the central duct are formed by the end of thicker parts of the central duct, these more thick, creating channels between them allowing the passage of the product towards the central duct openings.
  • the membrane comprises a flexible lip suitable, on the one hand for isolate the pumping chamber from the product source when the volume of the pumping decreases and, on the other hand, to allow a return of product in the pumping when the volume of the latter increases.
  • This flexible lip somehow plays the role of a suction valve.
  • the flexible lip is advantageously connected to the central part of the membrane by forming an annular groove open downwards and the retaining means are preferably formed by the end of an inner skirt coming to bear in the bottom of said groove, to retain the membrane when the movable member is moved towards the low to decrease the volume of the pumping chamber.
  • the aforementioned inner skirt advantageously has openings at its upper end, the height of which is less than that of the flexible lip, these openings allowing the product to reach the pumping chamber when the volume of the latter increases and the flexible lip moves away from the inner skirt under the effect of the push of the product flowing towards the pumping chamber.
  • the flexible lip is in a particular embodiment of increasing thickness in approaching the upper end of the membrane.
  • the central part of the membrane is connected at its upper end to an annular part whose width and thickness are chosen so as to improve the maintenance of the membrane when the part center is stretched.
  • the support comprises a sealing means applying sealingly on a tubular skirt of the movable member, this tubular skirt being open downward and extending around the central duct concentrically with the latter, the tubular skirt further defining, radially outward, the pumping.
  • the part of the membrane extending axially between the retaining means and the means for hooking the duct is tensioned, which keeps the movable member in high stop.
  • the invention also relates to a container equipped with a pump such as defined above.
  • FIG. 1 Partly shown in FIG. 1 is a container 1 comprising a body 2 forming a reservoir, of which only the upper end is seen in the drawing defining a neck 3 on which a support 4 is snapped on.
  • This support 4 constitutes a guide for mounting sliding along an axis X of a push button 5 and is also used for mounting a closing cover removable 6, covering the push button 5 before the first use.
  • the support 4 includes a skirt seal 7 applying in a sealed manner on the inner 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 other goes inward by a stepped wall 10 defining a nozzle 12 used for connection of a dip tube, not shown.
  • An outer skirt 15 and a guide skirt 16 are made in one holding by plastic molding with the sealing skirt 7, the fixing lugs 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 closure cover 6 bears.
  • 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 insert or insert, having a lower end 21 forcibly engaged in the stepped wall 10.
  • the inner skirt 20 has a substantially tapered upper end, provided with radial openings 22, as can be seen more particularly on the figure 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 produced in one piece with the inner skirt 20 on the outer side of the latter by plastic molding.
  • the push button 5 has an outer skirt 30, provided with its lower end of teeth 31 abutting against the upper edge 18 of the skirt outside 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 also includes a central duct 32, of axis X, and a tubular skirt 33 concentric, defining around the central duct 32 a chamber 34 annular pumping.
  • the outer skirt 30, the tubular skirt 33 and the central duct 32 are made in one piece by plastic molding with a dispensing nozzle 35, communicating internally with the central duct 32.
  • the latter comprises, at its lower end 87, in the example of embodiment of FIGS. 1 to 3, radial openings 36.
  • the lower end of the tubular skirt 33 forms a sealing lip 37, extending slightly radially outward.
  • the guide skirt 16 of the support 4 has in the upper part a surface inner 40 cylindrical of revolution and in the lower part a slight annular withdrawal 41.
  • the interior of the container is thus isolated from the ambient air, which is favorable to good conservation of the product.
  • the inner skirt 20 is used for mounting a membrane 50, shown in isolation in FIG. 6, having a central part 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.
  • the membrane 50 is made of a nitrile or silicone elastomer and comprises in the upper part a flexible annular lip 53 directed downwards.
  • This flexible lip 53 forms, by connecting with the central part 51, a annular groove 54 open downwards, into which the inner skirt 20 is inserted at its upper end, up to rest on its free edge in the bottom of this groove 54 against the wall 55 connecting the flexible lip 53 to the central part 51.
  • the flexible lip 53 is made so as to slightly tighten the skirt interior 20 at rest.
  • the height of the flexible lip 53 is greater than that of the openings 22 and the flexible lip 53 is able to be applied, 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 acts as a suction valve, isolating the chamber pumping 34 from inside the container when the volume of the pumping chamber decreases to distribute a dose of product, as will be explained below.
  • the wall 55 which joins the flexible lip 53 to the central part 51 is relatively wide and thick, which makes it possible to immobilize the upper end of the central part 51 of the membrane relative to the inner skirt 20, when the push button 5 is pressed.
  • the central duct 32 has on its outer surface parts more thick 60 extending axially, three in number in the embodiment described, separated by axial channels 61 as can be seen in FIG. 7.
  • Channels 61 extend over most of the height of the conduit central 32 from its upper end over the entire length of the thicker parts 60.
  • the latter form at their lower end a hanging skirt 64 which houses with the central duct 32 an annular groove 65 open downwards.
  • the hanging skirt 64 is located between a quarter and a third of the total height of the central duct 32 from its end lower 87.
  • the central part 51 of the membrane 50 has an upper part 56 and a lower part 57.
  • the latter is connected to the upper part 56 by a transverse wall. 58 extending radially inward from the lower end of the portion upper 56.
  • the lower part 57 extends above the transverse wall 58 to the inside of the upper part 56 to form a hanging skirt 59, forming with the upper part 56 an annular groove 70 open upwards.
  • the hanging skirt 64 of the central duct 32 is housed in the groove 70 and the attachment skirt 59 of the membrane 50 is housed in the groove 65, so that when the push button 5 is pressed in, the central part 51 of the membrane is pulled down essentially thanks to the attachment of the membrane to the attachment skirt 64 of the central duct 32.
  • the thickness of the hanging skirt 64 corresponds substantially to the width of the annular groove 70.
  • Axial channels 72 are produced on the inner face of the lower part 57 of the central part 51 of the membrane, as can be seen in FIG. 6.
  • These channels 72 have a depth which decreases gradually as and as we get closer to the bottom 52 of the membrane, as we can see on Figure 3.
  • the channels 72 open at the end upper part of the lower part 57 of the membrane.
  • the annular region 75 of the lower part 57 of the membrane which extends axially between the lower end of the channels 72 and the bottom 52, has a height greater than that of the radial openings 36 of the central duct 32.
  • this annular region 75 is chosen so that at rest it applies so watertight on the central duct 32 above the radial openings 36 and thus insulates these last of channels 72.
  • pump 1 The operation of pump 1 is as follows.
  • the product contained in the pumping chamber 34 is compressed and the lip flexible 53 is applied in leaktight manner to the outer face of the inner skirt 20.
  • the annular region 75 of the membrane 50 deviates of the central duct 32 and the product can reach the radial openings 36 to flow through the interior of the central duct to the outlet orifice of the dispensing nozzle 35.
  • the membrane 50 is only slightly mechanically stressed during the distribution of the product and the annular region 75 which is not stretched further measurement can deviate relatively easily from the central duct 32 under the pressure of the product flowing through channels 61.
  • the upper part 56 of the membrane 50 returns, thanks to its elasticity, to its initial shape and brings back the push button 5 up.
  • a vacuum is then created in the pumping chamber 34, which has for effect of detaching the flexible lip 53 from the inner skirt 20 and allows the product to gain the pumping chamber 34 by circulating through the inside of the nozzle 12 and the grooves 25 made on the inner face of the inner skirt 20.
  • the depression which is created in the pumping chamber 34 during the raising the push button 5 also has the effect of pressing the annular region 75 of the membrane against the central duct 32 and therefore of isolating the radial openings 36 from the pumping chamber 34.
  • the spring function of the diaphragm is in somehow independent of the discharge valve function, thanks to the hooking of the membrane on the central duct at a location remote from the end membrane.
  • the membrane has no other function only a spring function and does not exercise a valve function.
  • the length of the upper part 56 of the membrane 50 is chosen such that so that when the push button 5 comes to bear by the teeth 31 against the edge upper 18 above, the membrane is stretched.
  • FIGS. 8 to 12 show a first alternative embodiment.
  • the pump 1 'shown in Figures 8 to 12 differs from that which has been previously described by the shape of the central duct 32 'of the push button 5' and that of the membrane 50 '.
  • the central duct 32 ′ comprises in this variant of realization of a radial opening 36 'of reduced height and, at a relatively distance weak of its lower end 87 and above the radial opening 36 ', a boss ring finger 80.
  • the central duct 32 ' is for the rest identical to the central duct 32 previously described.
  • the membrane 50 ' has a central part 51', the lower part 57 'of which has an inside diameter slightly larger than that of the lower part 81 of the central duct 32 ′, and cleaning therewith an annular clearance 82, as can be seen see in figure 10.
  • the inner diameter of the lower part 57 ' corresponds to the diameter outside of the annular boss 80, so that the lower part 57 ′ is applied at rest sealingly on this annular boss 80.
  • Axial channels 72 ′ are produced on the inner face of the part lower 57 '.
  • the membrane 50 ' is identical for the rest to the membrane 50 previously described.
  • FIGS. 13 to 16 show a 1 "pump conforming to a second variant embodiment of the invention.
  • This 1 "pump differs from the pump shown in FIG. 1 in that the central duct 32 "of the push button 5" does not have radial openings 36 but simply the axial opening 86 defined by the circular edge of the end bottom 87 of the central duct 32 ".
  • the 1 "pump can still function properly due to the fact that the bottom 52 of the membrane 50, the thickness of which is substantially the same as that of the annular region 75, can deform downwards under the effect of product pressure during of the push-button 5 "being pushed in, the bottom 52 not being tensioned by the fact that the membrane 50 is hung higher on the hanging skirt 64.

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  • Reciprocating Pumps (AREA)
  • Closures For Containers (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • External Artificial Organs (AREA)

Abstract

A pump of the type comprising a moving member mounted to move relative to a support, the moving member having a central duct in which the substance to be dispensed penetrates via at least one opening, the support co-operating with the moving member to define a variable-volume pump chamber around said central duct, the pump having a diaphragm held by retaining means on the support, the diaphragm having a central portion in which one end of said central duct is inserted, the diaphragm having a valve-forming portion arranged to isolate the pump chamber from said opening(s) of the central duct while the volume of the pump chamber is increasing and the substance is being sucked into the pump chamber, the diaphragm also bearing against the moving member in such a manner that movement of the moving member to dispense the substance causes the diaphragm to be stretched elastically. The pump has means suitable, during movement of the moving member for dispensing the substance, for minimizing the stretching of the valve-forming portion of said diaphragm.

Description

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

On connaít par le brevet français FR-B-2 728 809 une pompe comportant un bouton-poussoir monté à déplacement sur un support assujetti au récipient contenant le produit à distribuer, ce bouton-poussoir comprenant un conduit central pourvu d'une ouverture radiale à son extrémité inférieure, le support définissant autour de ce conduit central une chambre de pompage de volume variable. Une membrane réalisée dans un matériau élastomère est montée sur le support. Cette membrane comporte une partie centrale 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 par une extrémité jusqu'à prendre appui contre le fond de la partie centrale de la membrane.We know from French patent FR-B-2 728 809 a pump comprising a push button mounted to move on a support subject to the container containing the product to be dispensed, this push button comprising a central duct provided with a radial opening at its lower end, the support defining around this conduit central a variable volume pumping chamber. A membrane made in a elastomeric material is mounted on the support. This membrane has a part sleeve-shaped central unit open at its upper end and closed at its end lower. The central conduit of the push button is inserted into the membrane by a end until pressing against the bottom of the central part of the membrane.

La membrane précitée joue la fonction d'un ressort en ramenant le bouton-poussoir dans sa position initiale après la distribution d'une dose de produit.The aforementioned membrane plays the function of a spring by bringing back the push button in its initial position after dispensing a dose of product.

Elle exerce également la fonction d'un clapet de refoulement.It also performs the function of a discharge valve.

En effet, au cours du mouvement de retour du bouton-poussoir, la membrane se plaque sur le conduit central et isole la chambre de pompage de l'ouverture radiale du conduit central afin d'éviter une rentrée d'air dans la chambre de pompage.Indeed, during the return movement of the push button, the membrane is pressed onto the central duct and isolates the pumping chamber from the radial opening 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.However, this known pump is not entirely satisfactory.

En particulier, la pompe peut s'avérer difficile à amorcer et dans certains cas le produit circule difficilement entre le conduit central du bouton-poussoir et la membrane, ce qui peut provoquer un blocage du bouton-poussoir.In particular, the pump may be difficult to prime and in some cases the product circulates with difficulty between the central duct of the push button and the membrane, which can cause a blockage of the push button.

L'invention vise à perfectionner encore une pompe du type comportant un organe mobile monté à déplacement relativement à un support, cet 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, la pompe comportant une membrane maintenue par des moyens de retenue sur le support, cette membrane ayant une partie centrale dans laquelle est inséré le conduit central par une extrémité, la membrane comportant une partie formant clapet, 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, la membrane venant en outre en appui sur l'organe mobile de telle sorte que le déplacement de ce dernier pour distribuer du produit produise un étirement élastique de la membrane.The invention aims to further improve a pump of the type comprising a movable member mounted to move relative to a support, this movable member comprising a central duct into which the product to be dispensed enters at the favor of at least one opening, the support defining with the movable member, around said central duct, a pumping chamber of variable volume, the pump comprising a membrane held by retaining means on the support, this membrane having a central part into which the central duct is inserted at one end, the membrane comprising a valve part, arranged so as to isolate the chamber pumping said opening (s) of the central duct when the volume of the pumping chamber increases and as product is sucked into it, the membrane further bearing on the movable member so that the displacement of the latter to dispense product produces an elastic stretch of the membrane.

La nouvelle pompe selon l'invention se caractérise par le fait qu'elle comporte des moyens aptes lors du déplacement de l'organe mobile pour distribuer du produit à minimiser l'étirement de la partie formant clapet de la membrane. Dans une réalisation préférée, la partie centrale de la membrane comporte des premiers moyens d'accrochage agencés pour coopérer avec des seconds moyens d'accrochage solidaires du conduit central, ces seconds moyens d'accrochage étant espacés de l'extrémité du conduit par laquelle le conduit est inséré dans la partie centrale de la membrane.The new pump according to the invention is characterized in that it comprises means suitable during movement of the movable member to distribute product to minimize stretching of the valve portion of the membrane. In an achievement preferred, the central part of the membrane comprises first attachment means arranged to cooperate with second attachment means integral with the duct central, these second attachment means being spaced from the end of the conduit by which the conduit is inserted in the central part of the membrane.

Grâce à l'invention, l'extrémité du conduit central n'appuie que faiblement ou pas du tout sur le fond de la partie centrale de la membrane lorsque l'organe mobile est déplacé pour distribuer du produit, contrairement à la pompe décrite dans le brevet français 2 728 809, dans laquelle l'étirement élastique de la membrane est dû au fait que le conduit central du bouton-poussoir appuie directement contre le fond de la partie centrale en forme de manchon de la membrane.Thanks to the invention, the end of the central duct bears only weakly or not at all on the bottom of the central part of the membrane when the movable member is moved to dispense product, unlike the pump described in the patent French 2,728,809, in which the elastic stretching of the membrane is due to the fact that the central duct of the push button presses directly against the bottom of the part central sleeve-shaped membrane.

Avantageusement, la portion de la membrane s'étendant entre les moyens de retenue du support et la zone d'accrochage sur le conduit central exerce uniquement une fonction de ressort.Advantageously, the portion of the membrane extending between the means of support retainer and the attachment zone on the central duct only exerts a spring function.

Avantageusement encore, la partie de la membrane formant clapet, agencée pour isoler la chambre de pompage de la ou des ouvertures du conduit central se situe hors de la portion de la membrane s'étendant entre la zone de fixation sur le support et la zone d'accrochage sur le conduit central.Advantageously also, the part of the membrane forming a valve, arranged to isolate the pumping chamber from the opening (s) of the central duct is located outside the portion of the membrane extending between the area of attachment to the support and the attachment area on the central duct.

Dans l'invention, la partie centrale de la membrane vient en appui sur le conduit central en un emplacement éloigné de l'extrémité de ce dernier, ce qui permet de diminuer les contraintes mécaniques auxquelles se trouve soumis le fond de la partie centrale de la membrane.In the invention, the central part of the membrane bears on the central duct at a location remote from the end of the latter, which allows reduce the mechanical stresses to which the bottom of the part is subjected membrane center.

De plus, du fait que le fond de la partie centrale de la membrane est moins sollicité mécaniquement, il devient plus aisé de faire jouer à la membrane sa fonction de clapet de refoulement, c'est-à-dire lui permettre d'isoler la chambre de pompage de la ou des ouvertures du conduit central lorsque le volume de la chambre de pompage augmente et que du produit est aspiré dans cette dernière. La partie inférieure de la partie centrale de la membrane peut se déformer plus facilement dans une direction perpendiculaire à la direction d'étirement de la partie supérieure de la partie centrale de la membrane, du fait qu'elle est soumise à moins de contraintes axiales, et le passage du produit à distribuer est ainsi facilité.In addition, because the bottom of the central part of the membrane is less mechanically stressed, it becomes easier to play the membrane its function of discharge valve, i.e. allowing it to isolate the pumping chamber from the or openings in the central duct when the volume of the pumping chamber increases and that product is sucked into it. The lower part of the central part of the membrane can deform more easily in a direction perpendicular to the direction of stretching of the upper part of the central part of the membrane, due to that it is subjected to less axial stresses, and the passage of the product to be distributed is thus facilitated.

Dans une réalisation particulière, les premiers moyens d'accrochage de la membrane forment une gorge ouverte dans la direction opposée au fond de la partie centrale de la membrane et les seconds moyens d'accrochage comportent une jupe d'accrochage dirigée vers l'extrémité du conduit central.In a particular embodiment, the first means of attachment of the membrane form an open groove in the opposite direction to the bottom of the part central of the membrane and the second attachment means comprise a skirt attachment directed towards the end of the central duct.

Toujours dans une réalisation particulière, la gorge précitée est formée entre deux parois tubulaires concentriques, constituant respectivement la partie inférieure et la partie supérieure de la partie centrale de la membrane, se recouvrant partiellement et réunies par une paroi transversale constituant le fond de ladite gorge.Still in a particular embodiment, the aforementioned groove is formed between two concentric tubular walls, respectively constituting the lower part and the upper part of the central part of the membrane, partially overlapping and joined by a transverse wall constituting the bottom of said groove.

Avantageusement, la paroi tubulaire formant la partie inférieure de la partie centrale de la membrane comporte, sur sa surface radialement intérieure, au moins un et de préférence plusieurs canaux axiaux.Advantageously, the tubular wall forming the lower part of the part central of the membrane comprises, on its radially inner surface, at least one and preferably several axial channels.

Ces canaux axiaux facilitent l'écoulement du produit lors de la distribution de celui-ci.These axial channels facilitate the flow of the product during the distribution of this one.

Avantageusement, les canaux axiaux précités s'étendent vers le bas depuis l'extrémité supérieure de la paroi tubulaire formant la partie inférieure de la partie centrale de la membrane, jusque sensiblement sous la paroi transversale susdite.Advantageously, the above-mentioned axial channels extend downwards from the upper end of the tubular wall forming the lower part of the part center of the membrane, up to substantially below the above transverse wall.

Avantageusement, la membrane est agencée pour isoler la chambre de pompage de la ou des ouvertures du conduit central en s'appliquant par une région annulaire, de manière étanche, sur une zone du conduit central située sous les seconds moyens d'accrochage.Advantageously, the membrane is arranged to isolate the chamber from pumping of the opening (s) of the central duct by applying through a region annular, sealingly, on an area of the central duct located under the second attachment means.

Cette zone du conduit central sur laquelle s'applique la membrane lorsque le volume de la chambre de pompage augmente et que du produit est aspiré dans cette dernière est avantageusement définie par un bossage annulaire. La membrane ménage alors avec le conduit central un jeu annulaire de part et d'autre dudit bossage, ce qui facilite l'écoulement du produit lors de sa distribution. This area of the central duct on which the membrane is applied when the volume of the pumping chamber increases and as product is drawn into this the latter is advantageously defined by an annular boss. The household membrane then with the central duct an annular clearance on either side of said boss, which facilitates the flow of the product during its distribution.

Dans une réalisation particulière, la partie inférieure du conduit central comporte au moins une ouverture radiale.In a particular embodiment, the lower part of the central duct has at least one radial opening.

En variante, la partie inférieure du conduit central ne comporte aucune ouverture radiale, ce qui facilite sa fabrication.Alternatively, the lower part of the central duct has no radial opening, which facilitates its manufacture.

Avantageusement, les seconds moyens d'accrochage du conduit central sont constitués par l'extrémité de parties plus épaisses du conduit central, ces parties plus épaisses ménageant entre elles des canaux permettant le passage du produit vers la ou les ouvertures du conduit central.Advantageously, the second means for hooking the central duct are formed by the end of thicker parts of the central duct, these more thick, creating channels between them allowing the passage of the product towards the central duct openings.

Avantageusement, la membrane comporte une lèvre flexible apte, d'une part à isoler la chambre de pompage de la source de produit quand le volume de la chambre de pompage diminue et, d'autre part, à permettre une rentrée de produit dans la chambre de pompage lorsque le volume de cette dernière augmente.Advantageously, the membrane comprises a flexible lip suitable, on the one hand for isolate the pumping chamber from the product source when the volume of the pumping decreases and, on the other hand, to allow a return of product in the pumping when the volume of the latter increases.

Cette lèvre flexible joue en quelque sorte le rôle d'un clapet d'aspiration.This flexible lip somehow plays the role of a suction valve.

De plus, la lèvre flexible se raccorde avantageusement à la partie centrale de la membrane en formant une gorge annulaire ouverte vers le bas et les moyens de retenue sont de préférence constitués par l'extrémité d'une jupe intérieure venant en appui dans le fond de ladite gorge, pour retenir la membrane lorsque l'organe mobile est déplacé vers le bas pour diminuer le volume de chambre de pompage.In addition, the flexible lip is advantageously connected to the central part of the membrane by forming an annular groove open downwards and the retaining means are preferably formed by the end of an inner skirt coming to bear in the bottom of said groove, to retain the membrane when the movable member is moved towards the low to decrease the volume of the pumping chamber.

La jupe intérieure précitée comporte avantageusement des ouvertures à son extrémité supérieure, dont la hauteur est inférieure à celle de la lèvre flexible, ces ouvertures permettant au produit de gagner la chambre de pompage lorsque le volume de cette dernière augmente et que la lèvre flexible s'écarte de la jupe intérieure sous l'effet de la poussée du produit s'écoulant vers la chambre de pompage.The aforementioned inner skirt advantageously has openings at its upper end, the height of which is less than that of the flexible lip, these openings allowing the product to reach the pumping chamber when the volume of the latter increases and the flexible lip moves away from the inner skirt under the effect of the push of the product flowing towards the pumping chamber.

La lèvre flexible est dans une réalisation particulière d'épaisseur croissante en se rapprochant de l'extrémité supérieure de la membrane.The flexible lip is in a particular embodiment of increasing thickness in approaching the upper end of the membrane.

Toujours 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 la partie centrale est étirée.Still in a particular embodiment, the central part of the membrane is connected at its upper end to an annular part whose width and thickness are chosen so as to improve the maintenance of the membrane when the part center is stretched.

Avantageusement, le support comporte un moyen 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, la jupe tubulaire définissant en outre, radialement vers l'extérieur, la chambre de pompage.Advantageously, the support comprises a sealing means applying sealingly on a tubular skirt of the movable member, this tubular skirt being open downward and extending around the central duct concentrically with the latter, the tubular skirt further defining, radially outward, the pumping.

Avantageusement, lorsque la pompe est au repos, la partie de la membrane s'étendant axialement entre les moyens de retenue et les moyens d'accrochage du conduit est tendue, ce qui permet de maintenir l'organe mobile en butée haute.Advantageously, when the pump is at rest, the part of the membrane extending axially between the retaining means and the means for hooking the duct is tensioned, which keeps the movable member in high stop.

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 ressortiront à la lecture de la description détaillée qui va suivre, d'exemples de réalisation non limitatifs et à l'examen du dessin annexé sur lequel :

  • la figure 1 est une vue partielle et schématique, en coupe axiale, d'un récipient équipé d'une pompe conforme à un premier exemple de mise en oeuvre de l'invention,
  • la figure 2 est une coupe axiale dans un plan perpendiculaire à celui de la figure 1,
  • la figure 3 représente un détail de la figure 1,
  • la figure 4 représente isolément le bouton-poussoir,
  • la figure 5 représente un détail de la figure 4,
  • la figure 6 représente isolément, en perspective et en coupe axiale, la membrane,
  • la figure 7 est une coupe selon le trait VII-VII de la figure 4,
  • la figure 8 est une vue analogue à la figure 1 représentant une première variante de réalisation de la pompe,
  • la figure 9 est une coupe axiale dans un plan perpendiculaire à celui de la figure 8,
  • la figure 10 représente un détail de la figure 8,
  • la figure 11 représente isolément le bouton-poussoir de la pompe de la figure 8,
  • la figure 12 représente un détail de la figure 11,
  • la figure 13 est une vue analogue à la figure 1 représentant une deuxième variante de réalisation de la pompe,
  • la figure 14 est une coupe axiale dans un plan perpendiculaire à celui de la figure 13,
  • la figure 15 représente un détail de la figure 13, et
  • la figure 16 représente isolément le bouton-poussoir de la pompe de la figure 13.
Other characteristics and advantages of the present invention will emerge on reading the detailed description which follows, of nonlimiting exemplary embodiments and on examining the appended drawing in which:
  • FIG. 1 is a partial and schematic view, in axial section, of a container equipped with a pump according to a first example of implementation of the invention,
  • FIG. 2 is an axial section in a plane perpendicular to that of FIG. 1,
  • FIG. 3 represents a detail of FIG. 1,
  • FIG. 4 represents the push button in isolation,
  • FIG. 5 represents a detail of FIG. 4,
  • FIG. 6 represents in isolation, in perspective and in axial section, the membrane,
  • FIG. 7 is a section along the line VII-VII of FIG. 4,
  • FIG. 8 is a view similar to FIG. 1 showing a first alternative embodiment of the pump,
  • FIG. 9 is an axial section in a plane perpendicular to that of FIG. 8,
  • FIG. 10 represents a detail of FIG. 8,
  • FIG. 11 represents in isolation the push button of the pump of FIG. 8,
  • FIG. 12 represents a detail of FIG. 11,
  • FIG. 13 is a view similar to FIG. 1 showing a second variant embodiment of the pump,
  • FIG. 14 is an axial section in a plane perpendicular to that of FIG. 13,
  • FIG. 15 represents a detail of FIG. 13, and
  • FIG. 16 represents the push-button of the pump of FIG. 13 in isolation.

On a représenté partiellement 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.Partly shown in FIG. 1 is a container 1 comprising a body 2 forming a reservoir, of which only the upper end is seen in the drawing defining a neck 3 on which a support 4 is snapped on.

Ce support 4 constitue un guide pour le montage à coulissement selon un axe X d'un bouton-poussoir 5 et sert par ailleurs au montage d'un capot de fermeture amovible 6, couvrant le bouton-poussoir 5 avant la première utilisation.This support 4 constitutes a guide for mounting sliding along an axis X of a push button 5 and is also used for mounting a closing cover removable 6, covering the push button 5 before the first use.

Dans l'exemple de réalisation décrit, le support 4 comporte une jupe d'étanchéité 7 s'appliquant de manière étanche sur la surface intérieure du col 3.In the embodiment described, the support 4 includes a skirt seal 7 applying in a sealed manner on the inner 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, non représenté.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 other goes inward by a stepped wall 10 defining a nozzle 12 used for connection of a dip tube, not shown.

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 fixing lugs 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 fermeture 6.The outer skirt 15 extends around the neck 3 of the container and has a shoulder 17 on which the closure cover 6 bears.

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 ou insert, ayant une extrémité inférieure 21 engagée à force dans la paroi étagée 10.The support 4 comprises an inner skirt 20 constituted by a part insert or insert, having a lower end 21 forcibly engaged in the stepped wall 10.

La jupe intérieure 20 comporte une extrémité supérieure sensiblement effilée, pourvue d'ouvertures radiales 22, comme on peut le voir plus particulièrement sur la figure 3.The inner skirt 20 has a substantially tapered upper end, provided with radial openings 22, as can be seen more particularly on the figure 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 produced in one piece with the inner skirt 20 on the outer side of the latter by plastic molding.

Le bouton-poussoir 5 comporte une jupe extérieure 30, pourvue à son extrémité inférieure de dents 31 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 30, provided with its lower end of teeth 31 abutting against the upper edge 18 of the skirt outside 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 également 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 also includes a central duct 32, of axis X, and a tubular skirt 33 concentric, defining around the central duct 32 a chamber 34 annular pumping.

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 dispensing nozzle 35, communicating internally with the central duct 32.

Ce dernier comporte, à son extrémité inférieure 87, dans l'exemple de réalisation des figures 1 à 3, des ouvertures radiales 36.The latter comprises, at its lower end 87, in the example of embodiment of FIGS. 1 to 3, radial openings 36.

L'extrémité inférieure de la jupe tubulaire 33 forme une lèvre d'étanchéité 37, s'étendant légèrement radialement vers l'extérieur.The lower end of the tubular skirt 33 forms a sealing lip 37, extending slightly radially outward.

La jupe de guidage 16 du support 4 présente en partie supérieure une surface intérieure 40 cylindrique de révolution et en partie inférieure un léger retrait annulaire 41.The guide skirt 16 of the support 4 has in the upper part a surface inner 40 cylindrical of revolution and in the lower part a slight annular withdrawal 41.

Lorsque le bouton-poussoir 5 est en position haute, la lèvre d'étanchéité 37 s'applique de manière étanche sur la surface intérieure 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 inner surface 40 of the 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 annulaire formée entre les jupes intérieure 20 et de guidage 16 de communiquer avec l'extérieur grâce au jeu annulaire 42, représenté sur la figure 3.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 shrinkage annular 41, which allows the annular groove formed between the inner skirts 20 and guide 16 to communicate with the outside through the annular clearance 42, shown in the figure 3.

La jupe intérieure 20 sert au montage d'une membrane 50, représentée isolément sur la figure 6, 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, shown in isolation in FIG. 6, having a central part 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.

La membrane 50 est réalisée dans un élastomère de nitrile ou de silicone et comporte en partie supérieure une lèvre annulaire flexible 53 dirigée vers le bas.The membrane 50 is made of a nitrile or silicone elastomer and comprises in the upper part a flexible annular lip 53 directed downwards.

Cette lèvre flexible 53 forme, en se raccordant avec la partie centrale 51, une gorge annulaire 54 ouverte vers le bas, dans laquelle est insérée la jupe intérieure 20 à son extrémité supérieure, jusqu'à prendre appui par son bord libre dans le fond de cette gorge 54 contre la paroi 55 reliant la lèvre flexible 53 à la partie centrale 51.This flexible lip 53 forms, by connecting with the central part 51, a annular groove 54 open downwards, into which the inner skirt 20 is inserted at its upper end, up to rest on its free edge in the bottom of this groove 54 against the wall 55 connecting the flexible lip 53 to the central part 51.

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

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 able to be applied, 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.

La lèvre flexible 53 joue le rôle d'un clapet d'aspiration, en isolant la chambre de pompage 34 de l'intérieur du récipient lorsque le volume de la chambre de pompage diminue pour distribuer une dose de produit, comme cela sera précisé plus loin.The flexible lip 53 acts as a suction valve, isolating the chamber pumping 34 from inside the container when the volume of the pumping chamber decreases to distribute a dose of product, as will be explained below.

La paroi 55 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 de la membrane par rapport à la jupe intérieure 20, lorsque le bouton-poussoir 5 est enfoncé.The wall 55 which joins the flexible lip 53 to the central part 51 is relatively wide and thick, which makes it possible to immobilize the upper end of the central part 51 of the membrane relative to the inner skirt 20, when the push button 5 is pressed.

Le conduit central 32 comporte sur sa surface extérieure des parties plus épaisses 60 s'étendant axialement, au nombre de trois dans l'exemple de réalisation décrit, séparées par des canaux axiaux 61 ainsi qu'on peut le voir sur la figure 7.The central duct 32 has on its outer surface parts more thick 60 extending axially, three in number in the embodiment described, separated by axial channels 61 as can be seen in FIG. 7.

Les canaux 61 s'étendent sur la majeure partie de la hauteur du conduit central 32 depuis son extrémité supérieure sur toute la longueur des parties plus épaisses 60.Channels 61 extend over most of the height of the conduit central 32 from its upper end over the entire length of the thicker parts 60.

Ces dernières forment à leur extrémité inférieure une jupe d'accrochage 64 qui ménage avec le conduit central 32 une gorge annulaire 65 ouverte vers le bas.The latter form at their lower end a hanging skirt 64 which houses with the central duct 32 an annular groove 65 open downwards.

Dans l'exemple de réalisation décrit, la jupe d'accrochage 64 se situe entre un quart et un tiers de la hauteur totale du conduit central 32 à partir de son extrémité inférieure 87.In the embodiment described, the hanging skirt 64 is located between a quarter and a third of the total height of the central duct 32 from its end lower 87.

La partie centrale 51 de la membrane 50 comporte une partie supérieure 56 et une partie inférieure 57. The central part 51 of the membrane 50 has an upper part 56 and a lower part 57.

Cette dernière se raccorde à la partie supérieure 56 par une paroi transversale 58 s'étendant radialement vers l'intérieur à partir de l'extrémité inférieure de la partie supérieure 56.The latter is connected to the upper part 56 by a transverse wall. 58 extending radially inward from the lower end of the portion upper 56.

La partie inférieure 57 se prolonge au-dessus de la paroi transversale 58 à l'intérieur de la partie supérieure 56 pour former une jupe d'accrochage 59, formant avec la partie supérieure 56 une gorge annulaire 70 ouverte vers le haut.The lower part 57 extends above the transverse wall 58 to the inside of the upper part 56 to form a hanging skirt 59, forming with the upper part 56 an annular groove 70 open upwards.

Lorsque la membrane 50 est en place sur le support 4, la jupe d'accrochage 64 du conduit central 32 est logée dans la gorge 70 et la jupe d'accrochage 59 de la membrane 50 est logée dans la gorge 65, de sorte que lorsque le bouton-poussoir 5 est enfoncé, la partie centrale 51 de la membrane est tirée vers le bas essentiellement grâce à l'accrochage de la membrane sur la jupe d'accrochage 64 du conduit central 32.When the membrane 50 is in place on the support 4, the hanging skirt 64 of the central duct 32 is housed in the groove 70 and the attachment skirt 59 of the membrane 50 is housed in the groove 65, so that when the push button 5 is pressed in, the central part 51 of the membrane is pulled down essentially thanks to the attachment of the membrane to the attachment skirt 64 of the central duct 32.

L'épaisseur de la jupe d'accrochage 64 correspond sensiblement à la largeur de la gorge annulaire 70.The thickness of the hanging skirt 64 corresponds substantially to the width of the annular groove 70.

Des canaux axiaux 72 sont réalisés sur la face intérieure de la partie inférieure 57 de la partie centrale 51 de la membrane, comme on peut le voir sur la figure 6.Axial channels 72 are produced on the inner face of the lower part 57 of the central part 51 of the membrane, as can be seen in FIG. 6.

Ces canaux 72 présentent une profondeur qui décroít progressivement au fur et à mesure que l'on se rapproche du fond 52 de la membrane, comme on peut le voir sur la figure 3.These channels 72 have a depth which decreases gradually as and as we get closer to the bottom 52 of the membrane, as we can see on Figure 3.

Dans l'exemple de réalisation décrit, les canaux 72 débouchent à l'extrémité supérieure de la partie inférieure 57 de la membrane.In the embodiment described, the channels 72 open at the end upper part of the lower part 57 of the membrane.

La région annulaire 75 de la partie inférieure 57 de la membrane, qui s'étend axialement entre l'extrémité inférieure des canaux 72 et le fond 52, présente une hauteur supérieure à celle des ouvertures radiales 36 du conduit central 32.The annular region 75 of the lower part 57 of the membrane, which extends axially between the lower end of the channels 72 and the bottom 52, has a height greater than that of the radial openings 36 of the central duct 32.

De plus, dans l'exemple de réalisation décrit, le diamètre intérieur de cette région annulaire 75 est choisi de manière à ce qu'au repos celle-ci s'applique de manière étanche sur le conduit central 32 au-dessus des ouvertures radiales 36 et isole ainsi ces dernières des canaux 72.In addition, in the example of embodiment described, the internal diameter of this annular region 75 is chosen so that at rest it applies so watertight on the central duct 32 above the radial openings 36 and thus insulates these last of channels 72.

Le fonctionnement de la pompe 1 est le suivant.The operation of pump 1 is as follows.

On suppose que la pompe 1 est amorcée.It is assumed that pump 1 is primed.

Lorsque l'utilisateur appuie sur le bouton-poussoir 5, le conduit central 32 se déplace vers le bas et la partie supérieure 56 de la membrane, retenue à sa partie supérieure par l'extrémité supérieure de la jupe intérieure 20 et en prise à son extrémité inférieure sur la jupe d'accrochage 64, s'étire élastiquement.When the user presses the push button 5, the central duct 32 moves down and the upper part 56 of the membrane, retained at its part upper by the upper end of the inner skirt 20 and engaged at its end lower on the hanging skirt 64, elastically stretches.

Le produit contenu dans la chambre de pompage 34 est comprimé et la lèvre flexible 53 s'applique de manière étanche sur la face extérieure de la jupe intérieure 20.The product contained in the pumping chamber 34 is compressed and the lip flexible 53 is applied in leaktight manner to the outer face of the inner skirt 20.

Sous la pression du produit, la région annulaire 75 de la membrane 50 s'écarte du conduit central 32 et le produit peut gagner les ouvertures radiales 36 pour s'écouler par l'intérieur du conduit central jusqu'à l'orifice de sortie de l'embout de distribution 35.Under the pressure of the product, the annular region 75 of the membrane 50 deviates of the central duct 32 and the product can reach the radial openings 36 to flow through the interior of the central duct to the outlet orifice of the dispensing nozzle 35.

Grâce à l'accrochage de la membrane 50 sur le conduit central 32 en un emplacement éloigné du fond 52, ce dernier n'est que faiblement sollicité mécaniquement lors de la distribution du produit et la région annulaire 75 qui n'est pas tendue outre mesure peut s'écarter relativement facilement du conduit central 32 sous la pression du produit qui circule par les canaux 61.Thanks to the attachment of the membrane 50 to the central duct 32 in one location far from the bottom 52, the latter is only slightly mechanically stressed during the distribution of the product and the annular region 75 which is not stretched further measurement can deviate relatively easily from the central duct 32 under the pressure of the product flowing through channels 61.

Lorsque l'utilisateur relâche le bouton-poussoir 5, la partie supérieure 56 de la membrane 50 retourne, grâce à son élasticité, à sa forme initiale et ramène le bouton-poussoir 5 vers le haut.When the user releases the push button 5, the upper part 56 of the membrane 50 returns, thanks to its elasticity, to its initial shape and brings back the push button 5 up.

Une dépression se crée alors dans la chambre de pompage 34, ce qui a pour effet de décoller la lèvre flexible 53 de la jupe intérieure 20 et permet au produit de gagner la chambre de pompage 34 en circulant par l'intérieur de l'embout 12 et les rainures 25 réalisées sur la face intérieure de la jupe intérieure 20.A vacuum is then created in the pumping chamber 34, which has for effect of detaching the flexible lip 53 from the inner skirt 20 and allows the product to gain the pumping chamber 34 by circulating through the inside of the nozzle 12 and the grooves 25 made on the inner face of the inner skirt 20.

La dépression qui est créée dans la chambre de pompage 34 lors de la remontée du bouton-poussoir 5 a également pour effet de plaquer la région annulaire 75 de la membrane contre le conduit central 32 et donc d'isoler les ouvertures radiales 36 de la chambre de pompage 34.The depression which is created in the pumping chamber 34 during the raising the push button 5 also has the effect of pressing the annular region 75 of the membrane against the central duct 32 and therefore of isolating the radial openings 36 from the pumping chamber 34.

Dans la pompe selon l'invention, la fonction de ressort de la membrane est en quelque sorte indépendante de la fonction de clapet de refoulement, grâce à l'accrochage de la membrane sur le conduit central en un emplacement éloigné de l'extrémité inférieure de la membrane.In the pump according to the invention, the spring function of the diaphragm is in somehow independent of the discharge valve function, thanks to the hooking of the membrane on the central duct at a location remote from the end membrane.

Autrement dit, entre les deux régions d'accrochage de la membrane sur le support et sur le conduit central respectivement, la membrane n'a pas d'autre fonction qu'une fonction de ressort et n'exerce pas de fonction de clapet.In other words, between the two attachment regions of the membrane on the support and on the central duct respectively, the membrane has no other function only a spring function and does not exercise a valve function.

Pour assembler la pompe 1, on commence par mettre en place la membrane 50 sur le conduit central 32 du bouton-poussoir 5 puis ce dernier est mis en place sur le support 4, les dents 31 franchissant par déformation élastique le bord supérieur 18 de la jupe extérieure 15.To assemble pump 1, we start by installing the membrane 50 on the central duct 32 of the push button 5 then the latter is put in place on the support 4, the teeth 31 crossing by elastic deformation the upper edge 18 of the outer skirt 15.

La longueur de la partie supérieure 56 de la membrane 50 est choisie de telle sorte que lorsque le bouton-poussoir 5 vient en appui par les dents 31 contre le bord supérieur 18 précité, la membrane soit tendue.The length of the upper part 56 of the membrane 50 is chosen such that so that when the push button 5 comes to bear by the teeth 31 against the edge upper 18 above, the membrane is stretched.

On a représenté sur les figures 8 à 12 une première variante de réalisation.FIGS. 8 to 12 show a first alternative embodiment.

Sur ces figures, on utilisera les mêmes signes de référence pour des éléments identiques à ceux qui viennent d'être déjà décrits.In these figures, the same reference signs will be used for elements identical to those which have just been described.

La pompe 1' représentée sur les figures 8 à 12 diffère de celle qui a été précédemment décrite par la forme du conduit central 32' du bouton-poussoir 5' et celle de la membrane 50'.The pump 1 'shown in Figures 8 to 12 differs from that which has been previously described by the shape of the central duct 32 'of the push button 5' and that of the membrane 50 '.

Plus précisément, le conduit central 32' comporte dans cette variante de réalisation une ouverture radiale 36' de hauteur réduite et, à une distance relativement faible de son extrémité inférieure 87 et au-dessus de l'ouverture radiale 36', un bossage annulaire 80.More specifically, the central duct 32 ′ comprises in this variant of realization of a radial opening 36 'of reduced height and, at a relatively distance weak of its lower end 87 and above the radial opening 36 ', a boss ring finger 80.

Le conduit central 32' est pour le reste identique au conduit central 32 précédemment décrit.The central duct 32 'is for the rest identical to the central duct 32 previously described.

La membrane 50' comporte une partie centrale 51' dont la partie inférieure 57' présente un diamètre intérieur légèrement supérieur à celui de la partie inférieure 81 du conduit central 32', et ménage avec cette dernière un jeu annulaire 82, comme on peut le voir sur la figure 10.The membrane 50 'has a central part 51', the lower part 57 'of which has an inside diameter slightly larger than that of the lower part 81 of the central duct 32 ′, and cleaning therewith an annular clearance 82, as can be seen see in figure 10.

Le diamètre intérieur de la partie inférieure 57' correspond au diamètre extérieur du bossage annulaire 80, de sorte que la partie inférieure 57' s'applique au repos de manière étanche sur ce bossage annulaire 80.The inner diameter of the lower part 57 'corresponds to the diameter outside of the annular boss 80, so that the lower part 57 ′ is applied at rest sealingly on this annular boss 80.

Des canaux axiaux 72' sont réalisés sur la face intérieure de la partie inférieure 57'.Axial channels 72 ′ are produced on the inner face of the part lower 57 '.

Ces canaux 72' débouchent à leur extrémité inférieure dans le jeu annulaire 82 au-dessus du bossage 80.These channels 72 'open at their lower end into the annular clearance 82 above boss 80.

La membrane 50' est identique pour le restant à la membrane 50 précédemment décrite.The membrane 50 'is identical for the rest to the membrane 50 previously described.

Dans l'exemple de réalisation des figures 8 à 12, l'écoulement du produit lors de l'enfoncement du bouton-poussoir 5' est facilité, grâce à la présence du jeu annulaire 82. In the embodiment of Figures 8 to 12, the flow of the product during the push-button 5 'is easier to push, thanks to the presence of the annular clearance 82.

On a représenté sur les figures 13 à 16 une pompe 1" conforme à une deuxième variante de réalisation de l'invention.FIGS. 13 to 16 show a 1 "pump conforming to a second variant embodiment of the invention.

Cette pompe 1" diffère de la pompe représentée sur la figure 1 par le fait que le conduit central 32" du bouton-poussoir 5" ne comporte pas d'ouvertures radiales 36 mais simplement l'ouverture axiale 86 définie par le bord circulaire de l'extrémité inférieure 87 du conduit central 32".This 1 "pump differs from the pump shown in FIG. 1 in that the central duct 32 "of the push button 5" does not have radial openings 36 but simply the axial opening 86 defined by the circular edge of the end bottom 87 of the central duct 32 ".

En dépit de ceci, la pompe 1" peut fonctionner correctement grâce au fait que le fond 52 de la membrane 50, dont l'épaisseur est sensiblement la même que celle de la région annulaire 75, peut se déformer vers le bas sous l'effet de la pression du produit lors de l'enfoncement du bouton-poussoir 5", le fond 52 n'étant pas tendu grâce au fait que la membrane 50 est accrochée plus haut sur la jupe d'accrochage 64.Despite this, the 1 "pump can still function properly due to the fact that the bottom 52 of the membrane 50, the thickness of which is substantially the same as that of the annular region 75, can deform downwards under the effect of product pressure during of the push-button 5 "being pushed in, the bottom 52 not being tensioned by the fact that the membrane 50 is hung higher on the hanging skirt 64.

Bien entendu, l'invention n'est pas limitée aux exemples de réalisation qui viennent d'être décrits.Of course, the invention is not limited to the exemplary embodiments which have just been described.

On peut notamment modifier la forme de la membrane, celle des moyens d'accrochage de la membrane sur le conduit central, ainsi que la forme du support et du bouton-poussoir, sans sortir du cadre de la présente invention.One can in particular modify the shape of the membrane, that of the means for attaching the membrane to the central duct, as well as the shape of the support and the push button, without departing from the scope of the present invention.

Claims (24)

  1. A pump (1; 1'; 1") of the type comprising a moving member (5; 5'; 5") mounted to move relative to a support (4), the moving member having a central duct (32; 32'; 32") in which the substance to be dispensed penetrates via at least one opening (36; 36'; 86), the support (4) co-operating with the moving member to define a variable-volume pump chamber (34) around said central duct, the pump having a diaphragm (50;.50') held by retaining means (20) on the support (4), the diaphragm having a central portion (51; 51') in which one end (87) of said central duct is inserted, the diaphragm having a valve-forming portion arranged to isolate the pump chamber (34) from said opening(s) (36; 36'; 86) of the central duct while the volume of the pump chamber is increasing and the substance is being sucked into the pump chamber, the diaphragm also bearing against the moving member in such a manner that movement of the moving member to dispense the substance causes the diaphragm to be stretched elastically, the pump being characterized by the fact that it has means suitable, during movement of the moving member for dispensing the substance, for minimizing the stretching of the valve-forming portion of said diaphragm.
  2. A pump according to claim 1, characterized by the fact that the diaphragm (50; 50') has first engagement means (59) arranged to co-operate with second engagement means (64) secured to said central duct, said second engagement means being spaced apart from the end (87) of the central duct.
  3. A pump according to claim 1 or 2, characterized by the fact that the portion of the diaphragm extending between the retaining means (20) of the support and the engagement zone of the central duct performs a spring function only.
  4. A pump according to the preceding claim, characterized by the fact that the portion of the valve-forming diaphragm that is arranged to isolate the pump chamber from the opening(s) of the central duct lies outside the portion of the diaphragm that extends between the zone for fixing on the support and the zone for engagement on the central duct.
  5. A pump according to any preceding claim, characterized by the fact that the first engagement means (59) of the diaphragm form a channel (70) that is open in the direction facing away from the end wall (52) of the central portion of the diaphragm, and the second engagement means comprise an engagement skirt (64) directed towards the end (87) of the central duct.
  6. A pump according to the preceding claim, characterized by the fact that the channel (70) is formed between two concentric tubular walls (56, 57) respectively constituting the bottom portion and the top portion of the central portion of the diaphragm, that overlap in part, and that are united by a transverse wall (58) constituting the web of said channel (70).
  7. A pump according to the preceding claim, characterized by the fact that the tubular wall (57; 57') forming the bottom portion of the central portion of the diaphragm has at least one and preferably a plurality of axial slots (72; 72') in its radially inner surface.
  8. A pump according to the preceding claim, characterized by the fact that said axial slots (72; 72') extend downwards from the top end of the tubular wall (57; 57') forming the bottom portion of the central portion of the diaphragm to perceptibly beneath the transverse wall (58).
  9. A pump according to any preceding claim, characterized by the fact that the diaphragm is arranged to isolate the pump chamber from the opening(s) (36; 36'; 86) of the central duct by causing an annular region (75) to bear in leakproof manner against a zone of the central duct situated beneath the second engagement means.
  10. A pump according to the preceding claim, characterized by the fact that the zone of the central duct against which the diaphragm bears while the volume of the pump chamber is increasing and the substance is being sucked into the pump chamber is defined by an annular bead (80).
  11. A pump according to the preceding claim, characterized by the fact that the diaphragm co-operates with the central duct to provide annular clearance (82) on either side of said bead (80).
  12. A pump according to any preceding claim, characterized by the fact that the bottom portion of the central duct has at least one radial opening (36; 36').
  13. A pump according to any one of claims 1 to 10, characterized by the fact that the bottom portion of the central duct does not have any radial opening.
  14. A pump according to any preceding claim, characterized by the fact that the second engagement means of the central duct are constituted by the ends of thicker portions (60) of the central duct, said thicker portions leaving slots (61) between one another enabling the substance to pass towards the opening(s) of the central duct.
  15. A pump according to any preceding claim, characterized by the fact that the diaphragm has a flexible lip (53) suitable firstly for isolating the pump chamber from the source of substance while the volume of the pump chamber is decreasing, and secondly for enabling the substance to penetrate into the pump chamber while the volume thereof is increasing.
  16. A pump according to the preceding claim, characterized by the fact that the flexible lip (53) is connected to the central portion of the diaphragm so as to form a downwardly open annular channel, and by the fact that the retaining means are constituted by the end of an inner skirt (20) coming to bear against the web of said channel so as to retain the diaphragm when the moving member is moved downwards in order to decrease the volume of the pump chamber.
  17. A pump according to the preceding claim, characterized by the fact that the inner skirt (20) has openings (22) at its top end, the height of the openings being less than the height of the flexible lip (53), said openings enabling the substance to reach the pump chamber while its volume is increasing, and while the flexible lip is spaced apart from the inner skirt under the effect of thrust from the substance flowing towards the pump chamber.
  18. A pump according to any one of the three preceding claims, characterized by the fact that the flexible lip (53) is of thickness that increases going towards the top end of the diaphragm.
  19. A pump according to any one of the four preceding claims, characterized by the fact that the central portion of the diaphragm is connected at its top end to an annular portion (55) of width and thickness selected in such a manner as to improve retention of the diaphragm while said central portion is being stretched.
  20. A pump according to any preceding claim, characterized by the fact that the support (4) includes sealing means (24) bearing in leakproof manner against the tubular skirt (33) of the moving member, said tubular skirt being downwardly open and extending concentrically around the central duct (32; 32'; 32"), said tubular skirt (33) also defining the radially outer wall of the pump chamber.
  21. A pump according to any preceding claim, characterized by the fact that when the pump is at rest, the portion (56) of the diaphragm that extends axially between the retaining means and the engagement means of the duct is under tension.
  22. A pump according to any preceding claim, characterized by the fact that the moving member constitutes the pushbutton (5; 5'; 5"), the central duct being integrally formed with a dispensing endpiece (35).
  23. A pump according to any preceding claim, characterized by the fact that the diaphragm (50; 50') is made of a nitrile elastomer or a silicon elastomer.
  24. A receptacle fitted with a pump as defined in any preceding claim.
EP01400384A 2000-02-15 2001-02-14 Pump comprising a movable part with a central duct and with a membrane hooked on the central duct, and container with the same Expired - Lifetime EP1125638B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0001843A FR2804887B1 (en) 2000-02-15 2000-02-15 PUMP COMPRISING A MOBILE MEMBER PROVIDED WITH A CENTRAL CONDUIT AND A MEMBRANE COMPRISING MOUNTING MEANS COMPRISING ON THIS CENTRAL CONDUIT, AND CONTAINER THUS EQUIPPED
FR0001843 2000-02-15

Publications (2)

Publication Number Publication Date
EP1125638A1 EP1125638A1 (en) 2001-08-22
EP1125638B1 true EP1125638B1 (en) 2004-10-06

Family

ID=8847002

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01400384A Expired - Lifetime EP1125638B1 (en) 2000-02-15 2001-02-14 Pump comprising a movable part with a central duct and with a membrane hooked on the central duct, and container with the same

Country Status (8)

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US (1) US6382471B2 (en)
EP (1) EP1125638B1 (en)
JP (1) JP3604346B2 (en)
AT (1) ATE278475T1 (en)
CA (1) CA2337167C (en)
DE (1) DE60106103T2 (en)
ES (1) ES2228764T3 (en)
FR (1) FR2804887B1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2852302B1 (en) * 2003-03-13 2006-07-14 Valois Sas FLUID PRODUCT DISPENSING MEMBER AND FLUID PRODUCT DISPENSING DEVICE COMPRISING SUCH AN ORGAN
FR2877320B1 (en) * 2004-11-03 2008-08-29 Airlessystems Sas FLUID PRODUCT DISPENSING MEMBER AND FLUID PRODUCT DISPENSING DEVICE PROVIDED WITH SUCH A DISPENSING MEMBER
US8695540B2 (en) 2012-06-18 2014-04-15 Aerojet Rocketdyne Of De, Inc. Fuel-cracking diesel engine system
ITVI20130130A1 (en) * 2013-05-08 2014-11-09 Taplast Srl DEVICE FOR DISTRIBUTION OF FLUIDS.
KR101681838B1 (en) * 2015-08-13 2016-12-01 (주)삼화피앤티 A pump vessel for making bubble foam

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2674024B1 (en) * 1991-03-11 1994-03-11 Daniel Crosnier METERING DEVICE ADAPTABLE TO VARIOUS CONTAINERS.
FR2723618B1 (en) * 1994-08-11 1996-10-31 Sofab MEMBRANE PUMP
FR2728809B1 (en) * 1995-01-04 1997-04-04 Daniel Crosnier DOSING DEVICE ADAPTABLE TO VARIOUS CONTAINERS

Also Published As

Publication number Publication date
DE60106103D1 (en) 2004-11-11
JP3604346B2 (en) 2004-12-22
ES2228764T3 (en) 2005-04-16
FR2804887A1 (en) 2001-08-17
CA2337167C (en) 2005-04-26
CA2337167A1 (en) 2001-08-15
FR2804887B1 (en) 2002-04-19
US6382471B2 (en) 2002-05-07
EP1125638A1 (en) 2001-08-22
ATE278475T1 (en) 2004-10-15
DE60106103T2 (en) 2005-10-20
JP2001289155A (en) 2001-10-19
US20010015358A1 (en) 2001-08-23

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