EP1881936B1 - Liquid product dispensing and receiving device - Google Patents

Liquid product dispensing and receiving device Download PDF

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Publication number
EP1881936B1
EP1881936B1 EP06726250.1A EP06726250A EP1881936B1 EP 1881936 B1 EP1881936 B1 EP 1881936B1 EP 06726250 A EP06726250 A EP 06726250A EP 1881936 B1 EP1881936 B1 EP 1881936B1
Authority
EP
European Patent Office
Prior art keywords
piston
membrane
chamber
wall
skirt
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.)
Not-in-force
Application number
EP06726250.1A
Other languages
German (de)
French (fr)
Other versions
EP1881936A1 (en
Inventor
David Leuliet
François NICOLLE
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.)
Silgan Dispensing Systems Le Treport SAS
Original Assignee
Rexam Dispensing Systems SAS
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 Rexam Dispensing Systems SAS filed Critical Rexam Dispensing Systems SAS
Publication of EP1881936A1 publication Critical patent/EP1881936A1/en
Application granted granted Critical
Publication of EP1881936B1 publication Critical patent/EP1881936B1/en
Not-in-force 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
    • B05B11/1042—Components or details
    • B05B11/1066—Pump inlet valves
    • B05B11/1067—Pump inlet valves actuated by pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/44—Valves specially adapted therefor; Regulating devices
    • B65D83/52—Valves specially adapted therefor; Regulating devices for metering
    • B65D83/54—Metering valves ; Metering valve assemblies
    • 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

Definitions

  • the invention relates to a device for the delivery and admission of a liquid product, or semi-liquid, preferably pharmaceutical or cosmetic, via a metering chamber of a pump body.
  • Such devices are usually designed for the dosed distribution of liquid product, and to seal the neck of a vial containing said liquid product to be delivered.
  • devices of this type forming a pump and comprising a pump body, a fixed piston mounted in the pump body, a variable volume metering chamber in which the end of the piston opens, the chamber communicating with the outside by an exhaust valve enclosed in a push button and whose actuation allows the delivery of a dose of product. Furthermore, the end of the piston is closed by a valve or a second inlet valve of the liquid product in the chamber.
  • the pump when such devices are implemented on bottles without air intake, for example with deformable walls, the pump must have a suction power necessary to reduce the volume of the container. This requirement is difficult to meet, and this can prevent the accuracy of doses of delivered products.
  • the known devices have problems with the priming of the pump. Indeed, by design, it is difficult to evacuate the air in the metering chamber before a first use of the dispenser.
  • the present invention overcomes the disadvantages of such pumps.
  • It relates in particular to a device designed to be implemented independently on a bottle with an upgradable capacity, that is to say a flexible bottle, or deformable bag, or on a mobile scraper bottle, or on a bottle rigid to constant capacity, requiring or not a return air.
  • the device according to the invention comprises a piston which is fixedly mounted in the pump body and which has an end sealingly engaged in the chamber, the end of the piston being capped with an elastically deformable membrane.
  • the device according to the invention ensures the evacuation of the air contained in the chamber, which allows the priming of the pump before a first use.
  • the boss consists of at least one axial rib projecting on the inner wall of the chamber.
  • the underside of the transverse wall of the membrane advantageously comprises an annular bead centered on the central orifice, and bearing against the element projecting from the end of the piston in the closed position of the valve.
  • the device according to the invention comprises a connecting element of the piston to the pump body, provided with a retaining bearing of the membrane.
  • the retaining bearing comprises latching means of the skirt of the membrane.
  • the detent means preferably consist of a peripheral groove formed in the side wall of the element and cooperating with a snap ring carried by the inner wall of the skirt.
  • the connecting element is an independent piece, designed to be attached to the lower part of the pump body.
  • the connecting element carries a transverse wall forming a bottom, intended to close the body at the bottom.
  • the connecting element comprises a cylindrical bore in which is fitted a product gripping tube.
  • the connecting element preferably comprises an axial supply duct communicating at the bottom with the cylindrical bore.
  • the connecting element has a peripheral shoulder against which the lower edge of the skirt of the membrane abuts.
  • the peripheral sealing lip is made in the vicinity of the peripheral shoulder. This makes it possible to reinforce the tightness of the device by limiting any radial movement of the membrane, which can off-set the protruding element with respect to the central orifice of the membrane.
  • the device according to the invention comprises an expansion cavity in which is housed the element projecting from the end of the piston. This cavity is being sealed at the bottom by the projecting element and at the top by the membrane.
  • the projecting element consists of a ball movable between a closed position of the valve and an open position where it allows the liquid product to enter the chamber.
  • the device according to the invention comprises centering elements of the element projecting in the axis of the supply orifice.
  • the device according to the invention ensures not only an easy and quick priming of the pump before a first use, but also a perfect seal between the end of the piston and the metering chamber, independently of the support force and how it is exerted by the user on the push button, or the area of the push button on which the user presses to operate the pump.
  • the device of the invention finds a particularly efficient application in the field of pump sprayers whose nozzle cooperates with a needle valve end.
  • the device which will now be described is particularly suitable for the delivery of a pharmaceutical product, of the drug type, contained in a reservoir bottle.
  • the figure 1 illustrates a first embodiment of the device according to the invention
  • the Figures 3 to 8 illustrate a second embodiment.
  • the device according to the invention is designed to deliver a dose of liquid or semi-liquid product via a metering chamber 1 of a pump body 2.
  • the pump body 2 comprises a hollow cylinder 21, of such dimensions that it can accommodate the device according to the invention.
  • the hollow cylinder 21 is open at a first end to accommodate an exhaust system, not shown in detail in the figures, which is equipped in particular with a push button 22 and which comprises the metering chamber 1.
  • the push button 22 is mounted movably in displacement between a depressed position and a high rest position in a guide sleeve 23 connected to the hollow cylinder 21 of the pump body 2.
  • a spring 24 working in compression in the sleeve 23 here provides the elastic return of the push button 22 from its depressed position to its rest position.
  • the first end of the hollow cylinder 21 has a flange 26 for hooking on the neck of a reservoir flask.
  • An annular seal 27 is optionally provided under the attachment flange 26 to seal the neck of the flask.
  • an outer ring 28 here serves to crimp the pump on the reservoir bottle.
  • a second end of the cylinder 21 of the pump body is closed around a conduit 25 for connecting the end of a receptacle tube 76 of liquid product contained in the reservoir bottle on which the pump is mounted.
  • the piston 3 which is fixedly mounted in the lower part of the pump body 2, has an upper end 31 sealingly engaged in the chamber 1.
  • the end 31 of the piston is capped with an at least partially elastically deformable membrane 4, which is more particularly represented on the figure 2 .
  • the membrane 4 comprises, on the one hand, a deformable transverse wall 41 forming an intake valve being provided with a central supply orifice 42, able to be closed in a sealed manner by a projecting element 5 forming a seat of the valve at the end of the piston 3 (see figure 3 ).
  • the membrane 4 comprises a cylindrical mounting skirt 43, provided with at least one, and here two peripheral sealing lips 44, in sliding contact with the inner wall of the chamber 1.
  • the skirt 43 may be made of a different material that is more rigid than that of the wall 41.
  • peripheral lips are made in the lower part of the cylindrical skirt of the membrane, to ensure an optimum seal that will be more explicitly detailed later.
  • the membrane 4 allows the introduction of the liquid product into the metering chamber 1, when it creates a vacuum in this chamber 1. Indeed, its deformable character of the wall 41 allows it to lift away from the protruding element under the pressure of the liquid, releasing the orifice 42 and thus allowing the liquid to enter the metering chamber.
  • the skirt 43 forms a valve by deformation of at least the lips 44 in contact with a boss 6 carried by the inner wall of the chamber 1, to release the compressed air by said piston 3 in the chamber 1 at priming of the pump.
  • the boss here consists of at least one axial rib 6 projecting on the inner wall of the chamber 1.
  • the axial rib 6 comprises a channel 61 which is longitudinal and of very small section, allowing the passage of the air removed from the metering chamber 1 at the priming of the pump.
  • the figure 4 shows in particular the shape that takes the membrane 4 when the piston 3 is pressed into the metering chamber.
  • the rib 6 crushes the sealing lips 44, without causing leakage of the liquid product. Indeed, the support contact between the groove 6 and the lips 44 does not create any passage for the liquid. Only the channel 61 forming capillary ensures the escape of the compressed air in the initial phase of priming of the pump, said exhaust being effected by bypassing the sealing lips 44 and towards the outside of the chamber 1.
  • the lower face of the transverse wall 41 comprises an annular bead 45 centered on said central orifice 42, and bearing against the element projection 5.
  • the device according to the invention comprises an element 7 ensuring the connection of the piston 3 to the pump body 2.
  • the connecting element 7 is provided with a bearing 71 for retaining the membrane 4.
  • the retaining bearing 71 comprises latching means of the skirt 43 of the membrane 4. These latching means consist of a peripheral groove 72, formed on the lateral wall of the element 7 and cooperating with a snap ring 73 carried by the inner wall of the skirt 43.
  • the connecting element 7 is here embodied as an independent part of the pump body 2, which is designed to be introduced through the upper opening and housed in the lower part of said body.
  • the connecting element 7 comprises a base 74 made in the form of a disk, to ensure the positioning and the coaxial wedging of the element.
  • the connecting element 7 could be attached to the lower part of the pump body 2, so that the transverse wall 74 would form a bottom closing said body 2 at the bottom.
  • the connecting element 7 comprises, in the lower part, a cylindrical bore 75 into which the tube 76 for gripping the liquid product ( figures 1 and 4 ).
  • the connecting element 7 comprises, in the upper part, an internal duct 77 for supplying the chamber 1 with product, the supply duct communicating with the cylindrical bore 75 ( figures 1 , 4 and 5 ).
  • the connecting element 7 also has a peripheral shoulder 78 against which the lower edge of the skirt 43 of the membrane 4 abuts.
  • an expansion cavity 8 is provided at the end of the piston 3 under the membrane 4, the cavity 8 being hermetically sealed by the projecting element 5 and the membrane 4.
  • the liquid product is introduced into this cavity before entering the metering chamber 1.
  • the projecting element 5 of the end of the piston 3 is housed in the cavity 8.
  • the projecting element 5 consists of a movable ball 5, resting between centering elements 51 in the closed position of the valve.
  • the upper end of the supply duct 77 is made in such a way that it forms a bowl 9 ( figure 1 ) in the form of a truncated cone for supporting and centering the ball 5.
  • the ball in the closed position of the valve, closes both the end of the supply duct 77 and the orifice of the membrane 4. It is thus immobilized between the bowl and the membrane. Thus, the ball prevents any entry of the liquid into the cavity 8, and any liquid inlet into the metering chamber.
  • the upper end of the connecting element 7 comprises crenellations delimited here by two lugs 52 carried by the bearing 71, intended to extend the conduit 77.
  • the tabs 52 hold the projecting element 5 centered in the axis of the leads 77 and away from its end.
  • the projecting element 5 is then in the form of a solid cylinder whose diameter is substantially equal to, or slightly greater than, the separation distance of the two lugs 52, so that the projecting element is immobilized between the two legs 52.
  • the liquid can be introduced into the expansion cavity 8.
  • Figures 6 to 8 illustrate each sectional view of the end of the piston along several transverse planes. These figures illustrate each zone occupied by the liquid when the projecting element 5 closes the orifice 42 of the membrane 4.
  • the figure 8 is a sectional view along the plane CC indicated on the figure 5 .
  • the figure 8 shows the fluid (grayed) occupying the supply duct 77.
  • the figure 7 is a sectional view along the plane DD indicated in figure 5 . This figure shows that the liquid occupies the entire free volume of the cavity 8 located under the projecting element 5 and on either side of the projecting element 5, between the centering tabs 52.
  • figure 6 is a sectional view according to the EE plane indicated in figure 5 . This figure shows that the liquid occupies the entire free volume of the cavity 8 located on either side of the projecting element 5, between the centering tabs 52.
  • the centering tabs 52 ensure that the projecting element 5 is always centered on the axis of the supply duct 77, and also on the axis of the orifice 42, to ensure a smooth flow of the liquid and an optimum seal at the orifice 42 of the membrane 4.
  • the position of the peripheral sealing lips 44 on the skirt 43 of the membrane 4 reinforces the sealing capacity of the membrane. Indeed, the more these lips 44 are at a level close to the shoulder 78, and the risk of displacement and misalignment of the membrane 4 relative to the axis of the supply duct is reduced.
  • the maximum sealing is ensured by the combination of the sealing lips 44 positioned in the vicinity of the shoulder 78, on the one hand, and the centering elements 51 (or 52) of the projecting element 5 forming a seat from the valve to the end of the piston, on the other hand.

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  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Closures For Containers (AREA)
  • Reciprocating Pumps (AREA)

Description

L'invention concerne un dispositif pour la délivrance et l'admission d'un produit liquide, ou semi liquide, de préférence pharmaceutique ou cosmétique, via une chambre de dosage d'un corps de pompe.The invention relates to a device for the delivery and admission of a liquid product, or semi-liquid, preferably pharmaceutical or cosmetic, via a metering chamber of a pump body.

De tels dispositifs sont usuellement conçus pour la distribution dosée de produit liquide, et pour fermer de manière étanche le col d'un flacon contenant ledit produit liquide à délivrer.Such devices are usually designed for the dosed distribution of liquid product, and to seal the neck of a vial containing said liquid product to be delivered.

Il existe des dispositifs de ce type formant pompe et comportant un corps de pompe, un piston monté fixe dans le corps de pompe, une chambre de dosage à volume variable dans laquelle l'extrémité du piston débouche, la chambre communiquant avec l'extérieur par un clapet d'échappement enfermé dans un bouton poussoir et dont l'actionnement permet la délivrance d'une dose de produit. Par ailleurs, l'extrémité du piston est fermée par une valve ou un second clapet d'admission du produit liquide dans la chambre.There are devices of this type forming a pump and comprising a pump body, a fixed piston mounted in the pump body, a variable volume metering chamber in which the end of the piston opens, the chamber communicating with the outside by an exhaust valve enclosed in a push button and whose actuation allows the delivery of a dose of product. Furthermore, the end of the piston is closed by a valve or a second inlet valve of the liquid product in the chamber.

De tels dispositifs présentent certains inconvénients, notamment dans le domaine pharmaceutique, car les doses de produits qui sont délivrées peuvent varier d'une pulvérisation à la suivante, alors que délivrance de doses précises est requise.Such devices have certain drawbacks, especially in the pharmaceutical field, because the doses of products that are delivered may vary from one spray to the next, while accurate dosing is required.

Par ailleurs, quand de tels dispositifs sont mis en oeuvre sur des flacons sans reprise d'air, par exemple à parois déformables, la pompe doit disposer d'une puissance d'aspiration nécessaire à la réduction du volume du récipient. Cette exigence est difficile à satisfaire, et cela peut empêcher la précision des doses de produits délivrées.Furthermore, when such devices are implemented on bottles without air intake, for example with deformable walls, the pump must have a suction power necessary to reduce the volume of the container. This requirement is difficult to meet, and this can prevent the accuracy of doses of delivered products.

En outre, de tels dispositifs sont très sensibles et leur fiabilité n'est pas toujours assurée. Le fabricant doit veiller au centrage et à l'alignement des éléments constituants la pompe autour de l'axe de symétrie de ladite pompe, sous peine de dysfonctionnements pouvant être à l'origine de doses incomplètes et/ou de puissance d'aspiration réduite. De plus, en actionnant la pompe, l'utilisateur doit veiller à appuyer au centre du bouton poussoir pour ne pas provoquer un décentrage des éléments de compression et éviter une rupture d'étanchéité entre la valve et la chambre de dosage.In addition, such devices are very sensitive and their reliability is not always assured. The manufacturer must ensure the centering and alignment of the components of the pump around the axis of symmetry of the pump, otherwise malfunctions may cause incomplete doses and / or reduced suction power. In addition, by actuating the pump, the user must be careful to press the center of the push button so as not to cause the compression elements to be off-center and to prevent a leakage rupture between the valve and the dosing chamber.

Par ailleurs, les dispositifs connus présentent des problèmes à l'amorçage de la pompe. En effet, de par leur conception, il est difficile d'évacuer l'air contenu dans la chambre de dosage avant une première utilisation du distributeur.Furthermore, the known devices have problems with the priming of the pump. Indeed, by design, it is difficult to evacuate the air in the metering chamber before a first use of the dispenser.

Un tel dispositif est connu par le document EP 0796804 qui divulge un dispositif selon le préambule de la revendication 1.Such a device is known from the document EP 0796804 which discloses a device according to the preamble of claim 1.

La présente invention permet de pallier les inconvénients de telles pompes.The present invention overcomes the disadvantages of such pumps.

Elle a notamment pour objet un dispositif conçu pour être mis en oeuvre indépendamment sur un flacon à contenance évolutive, c'est-à-dire un flacon souple, ou poche déformable, ou sur un flacon à piston racleur mobile, ou bien sur un flacon rigide à contenance constante, nécessitant ou pas une reprise d'air.It relates in particular to a device designed to be implemented independently on a bottle with an upgradable capacity, that is to say a flexible bottle, or deformable bag, or on a mobile scraper bottle, or on a bottle rigid to constant capacity, requiring or not a return air.

Le dispositif selon l'invention comporte un piston qui est monté fixe dans le corps de pompe et qui présente une extrémité engagée de manière étanche dans la chambre, l'extrémité du piston étant coiffée d'une membrane élastiquement déformable.The device according to the invention comprises a piston which is fixedly mounted in the pump body and which has an end sealingly engaged in the chamber, the end of the piston being capped with an elastically deformable membrane.

Selon l'invention, la membrane comporte :

  • d'une part, une paroi transversale formant clapet d'admission en étant pourvue d'un orifice central d'alimentation, susceptible d'être obturé de manière étanche par un élément en saillie formant siège du clapet à l'extrémité du piston, et
  • d'autre part, une jupe cylindrique de fixation pourvue d'au moins une lèvre périphérique d'étanchéité en contact coulissant avec la paroi interne de la chambre ;
la jupe forme une soupape par déformation au contact d'un bossage porté par la paroi interne de la chambre, pour libérer l'air comprimé par le piston dans la chambre à l'amorçage de la pompe.According to the invention, the membrane comprises:
  • on the one hand, a transverse wall forming an intake valve being provided with a central supply orifice, able to be sealingly closed by a projecting element forming a seat of the valve at the end of the piston, and
  • on the other hand, a cylindrical fixing skirt provided with at least one peripheral sealing lip in sliding contact with the inner wall of the chamber;
the skirt forms a valve by deformation in contact with a boss carried by the inner wall of the chamber, to release the compressed air by the piston in the chamber at the priming of the pump.

Ainsi réalisé, le dispositif selon l'invention assure l'évacuation de l'air contenu dans la chambre, ce qui permet l'amorçage de la pompe avant une première utilisation.Thus realized, the device according to the invention ensures the evacuation of the air contained in the chamber, which allows the priming of the pump before a first use.

Selon un premier mode de réalisation du dispositif selon l'invention, le bossage consiste en au moins une nervure axiale en saillie sur la paroi interne de la chambre.According to a first embodiment of the device according to the invention, the boss consists of at least one axial rib projecting on the inner wall of the chamber.

Pour favoriser l'étanchéité, la face inférieure de la paroi transversale de la membrane comporte avantageusement un bourrelet annulaire centré sur l'orifice central, et venant en appui contre l'élément en saillie de l'extrémité du piston en position de fermeture du clapet.To promote sealing, the underside of the transverse wall of the membrane advantageously comprises an annular bead centered on the central orifice, and bearing against the element projecting from the end of the piston in the closed position of the valve. .

Selon une variante de réalisation avantageuse, le dispositif selon l'invention comporte un élément de raccordement du piston au corps de pompe, pourvu d'un palier de retenue de la membrane.According to an advantageous embodiment, the device according to the invention comprises a connecting element of the piston to the pump body, provided with a retaining bearing of the membrane.

En outre, selon une autre variante réalisation, le palier de retenue comporte des moyens d'encliquetage de la jupe de la membrane. Les moyens d'encliquetage consistent préférentiellement en une gorge périphérique, ménagée dans la paroi latérale de l'élément et coopérant avec un jonc d'encliquetage porté par la paroi interne de la jupe.In addition, according to another alternative embodiment, the retaining bearing comprises latching means of the skirt of the membrane. The detent means preferably consist of a peripheral groove formed in the side wall of the element and cooperating with a snap ring carried by the inner wall of the skirt.

Selon encore une autre variante de réalisation, l'élément de raccordement est une pièce indépendante, conçue pour être rapportée à la partie inférieure du corps de pompe.According to yet another alternative embodiment, the connecting element is an independent piece, designed to be attached to the lower part of the pump body.

Selon encore une autre variante de réalisation, l'élément de raccordement porte une paroi transversale formant fond, destinée à obturer le corps en partie basse.According to yet another variant embodiment, the connecting element carries a transverse wall forming a bottom, intended to close the body at the bottom.

De manière avantageuse, on prévoit que l'élément de raccordement comporte un alésage cylindrique dans lequel est emmanché un tube de prise du produit. L'élément de raccordement comporte préférentiellement un conduit axial d'alimentation, communiquant en partie basse avec l'alésage cylindrique.Advantageously, it is expected that the connecting element comprises a cylindrical bore in which is fitted a product gripping tube. The connecting element preferably comprises an axial supply duct communicating at the bottom with the cylindrical bore.

En outre, il est avantageusement prévu que l'élément de raccordement présente un épaulement périphérique contre lequel le bord inférieur de la jupe de la membrane vient en butée.In addition, it is advantageously provided that the connecting element has a peripheral shoulder against which the lower edge of the skirt of the membrane abuts.

De manière avantageuse, il est prévu que la lèvre périphérique d'étanchéité soit réalisée au voisinage de l'épaulement périphérique. Cela permet de renforcer l'étanchéité du dispositif en limitant tout mouvement radial de la membrane, pouvant désaxer l'élément en saillie par rapport à l'orifice central de la membrane.Advantageously, it is provided that the peripheral sealing lip is made in the vicinity of the peripheral shoulder. This makes it possible to reinforce the tightness of the device by limiting any radial movement of the membrane, which can off-set the protruding element with respect to the central orifice of the membrane.

Selon encore une autre variante de réalisation, le dispositif selon l'invention comporte une cavité d'expansion dans laquelle est logé l'élément en saillie de l'extrémité du piston. Cette cavité est étant fermée hermétiquement dans le bas par l'élément en saillie et dans le haut par la membrane.According to yet another variant embodiment, the device according to the invention comprises an expansion cavity in which is housed the element projecting from the end of the piston. This cavity is being sealed at the bottom by the projecting element and at the top by the membrane.

Enfin, il est avantageusement prévu que l'élément en saillie consiste en une bille mobile entre une position de fermeture du clapet et une position d'ouverture où elle autorise l'entrée du produit liquide dans la chambre.Finally, it is advantageously provided that the projecting element consists of a ball movable between a closed position of the valve and an open position where it allows the liquid product to enter the chamber.

De préférence, le dispositif selon l'invention comporte des éléments de centrage de l'élément en saillie dans l'axe de l'orifice d'alimentation.Preferably, the device according to the invention comprises centering elements of the element projecting in the axis of the supply orifice.

Ainsi réalisé, le dispositif selon l'invention assure non seulement un amorçage facile et rapide de la pompe avant une première utilisation, mais également une étanchéité parfaite entre l'extrémité du piston et la chambre de dosage, indépendamment de la force d'appui et de la manière dont elle est exercée par l'utilisateur sur le bouton poussoir, ou de la zone du bouton poussoir sur laquelle l'utilisateur appuie pour actionner la pompe.Thus realized, the device according to the invention ensures not only an easy and quick priming of the pump before a first use, but also a perfect seal between the end of the piston and the metering chamber, independently of the support force and how it is exerted by the user on the push button, or the area of the push button on which the user presses to operate the pump.

Le dispositif de l'invention trouve une application particulièrement performante dans le domaine des pulvérisateurs à pompe dont le gicleur coopère avec une valve d'extrémité à pointeau.The device of the invention finds a particularly efficient application in the field of pump sprayers whose nozzle cooperates with a needle valve end.

D'autres objets et avantages de l'invention apparaîtront au cours de la description qui suit, faite en référence aux figures 1 à 8 parmi lesquelles :

  • la figure 1 montre, en vue de coupe partielle, un dispositif selon l'invention monté dans une pompe ;
  • la figure 2 illustre un mode de réalisation d'une membrane que comporte un dispositif selon l'invention, en vue de profil ;
  • la figure 3 montre un second mode de réalisation du dispositif selon l'invention, en vue de profil, la membrane étant représentée partiellement de manière à faire paraître divers éléments du dispositif selon l'invention ;
  • la figure 4 représente, en vue de coupe, le dispositif illustré sur la figure 3 et monté dans un corps de pompe, au moment de l'amorçage de la pompe ;
  • la figure 5 représente, en vue de coupe, le dispositif des figures 3 et 4 avant amorçage de la pompe ;
  • la figure 6 est une vue de coupe du dispositif de la figure 5 suivant le plan E-E représenté sur la figure 5 ;
  • la figure 7 est une vue de coupe du dispositif de la figure 5 suivant le plan D-D représenté sur la figure 5 ;
  • et la figure 8 est une vue de coupe du dispositif de la figure 5 suivant le plan C-C représenté sur la figure 5.
Other objects and advantages of the invention will become apparent from the description which follows, made with reference to the Figures 1 to 8 among :
  • the figure 1 shows, in partial sectional view, a device according to the invention mounted in a pump;
  • the figure 2 illustrates an embodiment of a membrane that comprises a device according to the invention, in profile view;
  • the figure 3 shows a second embodiment of the device according to the invention, in profile view, the membrane being partially shown so as to show various elements of the device according to the invention;
  • the figure 4 represents, in sectional view, the device illustrated on the figure 3 and mounted in a pump body, at the time of priming the pump;
  • the figure 5 represents, in sectional view, the device of figures 3 and 4 before priming the pump;
  • the figure 6 is a sectional view of the device of the figure 5 according to the EE plan represented on the figure 5 ;
  • the figure 7 is a sectional view of the device of the figure 5 according to the plan DD represented on the figure 5 ;
  • and the figure 8 is a sectional view of the device of the figure 5 according to the plane CC represented on the figure 5 .

Le dispositif qui va maintenant être décrit est particulièrement adapté à la délivrance d'un produit pharmaceutique, du type médicament, contenu dans un flacon réservoir.The device which will now be described is particularly suitable for the delivery of a pharmaceutical product, of the drug type, contained in a reservoir bottle.

Il devra toutefois être entendu que le dispositif selon l'invention ne s'applique pas uniquement à la distribution de produit pharmaceutique, et qu'il concerne tout dispositif répondant à la définition de l'invention susceptible d'être utilisée dans tout type de corps de pompe.However, it should be understood that the device according to the invention does not apply solely to the pharmaceutical product distribution, and that it relates to any device that meets the definition of the invention may be used in any type of body pump.

À cet effet, deux modes de réalisation du dispositif selon l'invention sont présentés ci-après.For this purpose, two embodiments of the device according to the invention are presented below.

La figure 1 illustre un premier mode de réalisation du dispositif selon l'invention, et les figures 3 à 8 illustrent un second mode de réalisation.The figure 1 illustrates a first embodiment of the device according to the invention, and the Figures 3 to 8 illustrate a second embodiment.

Quel que soit le mode de réalisation représenté sur les figures, le dispositif selon l'invention est conçu pour délivrer une dose de produit liquide, ou semi liquide, via une chambre de dosage 1 d'un corps de pompe 2.Whatever the embodiment shown in the figures, the device according to the invention is designed to deliver a dose of liquid or semi-liquid product via a metering chamber 1 of a pump body 2.

De manière classique en soit, comme le montre la figure 1 par exemple, le corps de pompe 2 comporte un cylindre creux 21, de dimensions telles qu'il peut accueillir le dispositif selon l'invention.In a classical way, as shown in figure 1 for example, the pump body 2 comprises a hollow cylinder 21, of such dimensions that it can accommodate the device according to the invention.

Le cylindre creux 21 est ouvert à une première extrémité pour accueillir un système d'échappement , non représenté en détails sur les figures, qui est équipé notamment d'un bouton poussoir 22 et qui comprend la chambre de dosage 1.The hollow cylinder 21 is open at a first end to accommodate an exhaust system, not shown in detail in the figures, which is equipped in particular with a push button 22 and which comprises the metering chamber 1.

Le bouton poussoir 22 est monté mobile en déplacement entre une position enfoncée et une position haute de repos dans un manchon de guidage 23 assemblé au cylindre creux 21 du corps de pompe 2.The push button 22 is mounted movably in displacement between a depressed position and a high rest position in a guide sleeve 23 connected to the hollow cylinder 21 of the pump body 2.

Un ressort 24 travaillant en compression dans le manchon 23 assure ici le rappel élastique du bouton poussoir 22 de sa position enfoncée à sa position de repos.A spring 24 working in compression in the sleeve 23 here provides the elastic return of the push button 22 from its depressed position to its rest position.

La première extrémité du cylindre creux 21 présente une collerette 26 d'accrochage sur le col d'un flacon réservoir. On prévoit éventuellement un joint 27 annulaire, sous la collerette d'accrochage 26, pour assurer l'étanchéité avec le col du flacon. En outre, une frette extérieure 28 permet ici de sertir la pompe sur le flacon réservoir.The first end of the hollow cylinder 21 has a flange 26 for hooking on the neck of a reservoir flask. An annular seal 27 is optionally provided under the attachment flange 26 to seal the neck of the flask. In addition, an outer ring 28 here serves to crimp the pump on the reservoir bottle.

Afin de faciliter la lecture des figures, ni le flacon réservoir ni le produit liquide n'ont été représentés.In order to facilitate the reading of the figures, neither the reservoir flask nor the liquid product have been represented.

Une seconde extrémité du cylindre 21 du corps de pompe est fermée autour d'un conduit 25 assurant le raccordement de l'extrémité d'un tube de prise 76 de produit liquide contenu dans le flacon réservoir sur lequel est montée la pompe.A second end of the cylinder 21 of the pump body is closed around a conduit 25 for connecting the end of a receptacle tube 76 of liquid product contained in the reservoir bottle on which the pump is mounted.

Comme le montre la figure 1, le dispositif selon l'invention, qui est monté dans le corps de pompe 2, comporte notamment un piston 3.As shown in figure 1 , the device according to the invention, which is mounted in the pump body 2, comprises in particular a piston 3.

Le piston 3 qui est monté fixe dans la partie inférieure du corps de pompe 2, présente une extrémité supérieure 31 engagée de manière étanche dans la chambre 1.The piston 3 which is fixedly mounted in the lower part of the pump body 2, has an upper end 31 sealingly engaged in the chamber 1.

L'extrémité 31 du piston est coiffée d'une membrane au moins partiellement élastiquement déformable 4, qui est plus particulièrement représentée sur la figure 2.The end 31 of the piston is capped with an at least partially elastically deformable membrane 4, which is more particularly represented on the figure 2 .

La membrane 4 comporte, d'une part, une paroi transversale déformable 41 formant clapet d'admission en étant pourvue d'un orifice central d'alimentation 42, susceptible d'être obturé de manière étanche par un élément en saillie 5 formant siège du clapet à l'extrémité du piston 3 (voir figure 3).The membrane 4 comprises, on the one hand, a deformable transverse wall 41 forming an intake valve being provided with a central supply orifice 42, able to be closed in a sealed manner by a projecting element 5 forming a seat of the valve at the end of the piston 3 (see figure 3 ).

D'autre part, la membrane 4 comporte une jupe cylindrique 43 de fixation, pourvue d'au moins une, et ici de deux lèvres périphériques d'étanchéité 44, en contact coulissant avec la paroi interne de la chambre 1.On the other hand, the membrane 4 comprises a cylindrical mounting skirt 43, provided with at least one, and here two peripheral sealing lips 44, in sliding contact with the inner wall of the chamber 1.

Le cas échéant, la jupe 43 pourra être réalisée avec un matériau différent et plus rigide de celui de la paroi 41.Where appropriate, the skirt 43 may be made of a different material that is more rigid than that of the wall 41.

On prévoit que les lèvres périphériques soient réalisées en partie basse de la jupe cylindrique de la membrane, pour assurer une étanchéité optimum qui sera plus explicitement détaillée par la suite.It is expected that the peripheral lips are made in the lower part of the cylindrical skirt of the membrane, to ensure an optimum seal that will be more explicitly detailed later.

La membrane 4 permet l'introduction du produit liquide dans la chambre de dosage 1, quand il se crée une dépression dans cette chambre 1. En effet, son caractère déformable de la paroi 41 lui permet de se soulever en s'écartant de l'élément en saillie sous la pression du liquide, en dégageant l'orifice 42 et en permettant ainsi au liquide de pénétrer dans la chambre de dosage.The membrane 4 allows the introduction of the liquid product into the metering chamber 1, when it creates a vacuum in this chamber 1. Indeed, its deformable character of the wall 41 allows it to lift away from the protruding element under the pressure of the liquid, releasing the orifice 42 and thus allowing the liquid to enter the metering chamber.

Conformément à l'invention, la jupe 43 forme une soupape par déformation d'au moins les lèvres 44 au contact d'un bossage 6 porté par la paroi interne de la chambre 1, pour libérer l'air comprimé par ledit piston 3 dans la chambre 1 à l'amorçage de la pompe.According to the invention, the skirt 43 forms a valve by deformation of at least the lips 44 in contact with a boss 6 carried by the inner wall of the chamber 1, to release the compressed air by said piston 3 in the chamber 1 at priming of the pump.

Comme le montre la figure 1, le bossage consiste ici en au moins une nervure axiale 6 en saillie sur la paroi interne de la chambre 1.As shown in figure 1 , the boss here consists of at least one axial rib 6 projecting on the inner wall of the chamber 1.

La nervure axiale 6 comporte un canal 61 qui est longitudinal et de très faible section, permettant le passage de l'air chassé de la chambre de dosage 1 à l'amorçage de la pompe.The axial rib 6 comprises a channel 61 which is longitudinal and of very small section, allowing the passage of the air removed from the metering chamber 1 at the priming of the pump.

La figure 4 montre en particulier la forme que prend la membrane 4 lorsque le piston 3 est enfoncé dans la chambre de dosage.The figure 4 shows in particular the shape that takes the membrane 4 when the piston 3 is pressed into the metering chamber.

On remarque que la nervure 6 écrase les lèvres d'étanchéité 44, sans provoquer de rupture d'étanchéité au produit liquide. En effet, le contact d'appui entre la rainure 6 et les lèvres 44 ne crée aucun passage pour le liquide. Seul le canal 61 formant capillaire assure l'échappement de l'air comprimé dans la phase initiale d'amorçage de la pompe, ledit échappement s'effectuant en contournant les lèvres d'étanchéité 44 et vers l'extérieur de la chambre 1.It is noted that the rib 6 crushes the sealing lips 44, without causing leakage of the liquid product. Indeed, the support contact between the groove 6 and the lips 44 does not create any passage for the liquid. Only the channel 61 forming capillary ensures the escape of the compressed air in the initial phase of priming of the pump, said exhaust being effected by bypassing the sealing lips 44 and towards the outside of the chamber 1.

Pour favoriser l'étanchéité du clapet d'admission entre la membrane 4 et l'extrémité du piston, la face inférieure de la paroi transversale 41 comporte un bourrelet annulaire 45 centré sur ledit orifice central 42, et venant en appui contre l'élément en saillie 5.To promote the sealing of the intake valve between the membrane 4 and the end of the piston, the lower face of the transverse wall 41 comprises an annular bead 45 centered on said central orifice 42, and bearing against the element projection 5.

Comme le montre plus particulièrement la figure 3 en coupe partielle, le dispositif selon l'invention comporte un élément 7 assurant le raccordement du piston 3 au corps de pompe 2.As shown more particularly in figure 3 in partial section, the device according to the invention comprises an element 7 ensuring the connection of the piston 3 to the pump body 2.

L'élément de raccordement 7 est pourvu d'un palier 71 de retenue de la membrane 4.The connecting element 7 is provided with a bearing 71 for retaining the membrane 4.

Le palier de retenue 71 comporte des moyens d'encliquetage de la jupe 43 de la membrane 4. Ces moyens d'encliquetage consistent en une gorge périphérique 72, ménagée sur la paroi latérale de l'élément 7 et coopérant avec un jonc d'encliquetage 73 porté par la paroi interne de la jupe 43.The retaining bearing 71 comprises latching means of the skirt 43 of the membrane 4. These latching means consist of a peripheral groove 72, formed on the lateral wall of the element 7 and cooperating with a snap ring 73 carried by the inner wall of the skirt 43.

L'élément de raccordement 7 est ici réalisé sous la forme d'une pièce indépendante du corps de pompe 2, qui est conçue pour être introduite par l'ouverture supérieure et logée dans la partie inférieure dudit corps.The connecting element 7 is here embodied as an independent part of the pump body 2, which is designed to be introduced through the upper opening and housed in the lower part of said body.

L'élément de raccordement 7 comporte une base 74 réalisée sous la forme d'un disque, pour assurer le positionnement et le calage coaxial de l'élément.The connecting element 7 comprises a base 74 made in the form of a disk, to ensure the positioning and the coaxial wedging of the element.

On prévoit de réaliser au moins une encoche radiale 79 dans l'épaisseur du disque, coopérant avec un plot (non représenté sur les figures) en saillie du fond du corps de pompe, qui empêche toute rotation dudit dispositif selon l'invention quand celui-ci est correctement disposé au fond du corps de pompe.It is intended to provide at least one radial slot 79 in the thickness of the disc, cooperating with a stud (not shown in the figures) projecting from the bottom of the pump body, which prevents any rotation of said device according to the invention when the latter it is correctly arranged at the bottom of the pump body.

Il devra être entendu que, selon une variante non représentée, l'élément de raccordement 7 pourrait être rapporté à la partie inférieure du corps de pompe 2, de telle sorte que la paroi transversale 74 formerait un fond obturant ledit corps 2 en partie basse.It should be understood that, according to a variant not shown, the connecting element 7 could be attached to the lower part of the pump body 2, so that the transverse wall 74 would form a bottom closing said body 2 at the bottom.

Comme on peut le voir sur la figure 5 en particulier, l'élément de raccordement 7 comporte, en partie basse, un alésage cylindrique 75 dans lequel vient s'emmancher le tube 76 de prise du produit liquide (figures 1 et 4).As can be seen on the figure 5 in particular, the connecting element 7 comprises, in the lower part, a cylindrical bore 75 into which the tube 76 for gripping the liquid product ( figures 1 and 4 ).

En outre, l'élément de raccordement 7 comporte, en partie haute, un conduit interne 77 pour l'alimentation de la chambre 1 en produit, le conduit d'alimentation communiquant avec l'alésage cylindrique 75 (figures 1, 4 et 5).In addition, the connecting element 7 comprises, in the upper part, an internal duct 77 for supplying the chamber 1 with product, the supply duct communicating with the cylindrical bore 75 ( figures 1 , 4 and 5 ).

Comme il est indiqué sur les figures 4 et 5, l'élément de raccordement 7 présente aussi un épaulement périphérique 78 contre lequel le bord inférieur de la jupe 43 de la membrane 4 vient en butée.As indicated on the figures 4 and 5 , the connecting element 7 also has a peripheral shoulder 78 against which the lower edge of the skirt 43 of the membrane 4 abuts.

Comme on peut particulièrement le voir sur la figure 3, une cavité d'expansion 8 est prévue à l'extrémité du piston 3 sous la membrane 4, la cavité 8 étant fermée hermétiquement par l'élément en saillie 5 et par la membrane 4.As can be seen especially on the figure 3 an expansion cavity 8 is provided at the end of the piston 3 under the membrane 4, the cavity 8 being hermetically sealed by the projecting element 5 and the membrane 4.

Le produit liquide s'introduit dans cette cavité avant de pénétrer dans la chambre de dosage 1.The liquid product is introduced into this cavity before entering the metering chamber 1.

Comme on peut le voir sur les figures, l'élément en saillie 5 de l'extrémité du piston 3 est logé dans la cavité 8.As can be seen in the figures, the projecting element 5 of the end of the piston 3 is housed in the cavity 8.

Selon le premier mode de réalisation illustré sur la figure 1, l'élément en saillie 5 consiste en une bille mobile 5, reposant entre des éléments de centrage 51 en position de fermeture du clapet.According to the first embodiment illustrated on the figure 1 , the projecting element 5 consists of a movable ball 5, resting between centering elements 51 in the closed position of the valve.

Comme on peut le voir sur la figure 1, l'extrémité supérieure du conduit d'alimentation 77 est réalisée de telle manière qu'elle forme une cuvette 9 (figure 1) en forme de tronc de cône permettant le support et le centrage de la bille 5.As can be seen on the figure 1 the upper end of the supply duct 77 is made in such a way that it forms a bowl 9 ( figure 1 ) in the form of a truncated cone for supporting and centering the ball 5.

Suivant ce mode de réalisation, en position de fermeture du clapet, la bille obture à la fois l'extrémité du conduit d'alimentation 77 et l'orifice de la membrane 4. Elle est ainsi immobilisée entre la cuvette et la membrane. Ainsi, la bille empêche toute entrée du liquide dans la cavité 8, et toute entrée de liquide dans la chambre de dosage.According to this embodiment, in the closed position of the valve, the ball closes both the end of the supply duct 77 and the orifice of the membrane 4. It is thus immobilized between the bowl and the membrane. Thus, the ball prevents any entry of the liquid into the cavity 8, and any liquid inlet into the metering chamber.

Suivant un autre mode de réalisation illustré par exemple sur les figures 4 ou 5, l'extrémité supérieure de l'élément de raccordement 7 comporte des créneaux délimités ici par deux pattes 52 portés par le palier 71, destinés à prolonger le conduit 77. Les pattes 52 maintiennent l'élément en saillie 5 centré dans l'axe du conduit 77 et à distance de son extrémité. L'élément en saillie 5 se présente alors sur la forme d'un cylindre plein dont le diamètre est sensiblement égal, voir légèrement supérieur, à la distance de séparation des deux pattes 52, de sorte que l'élément en saillie soit immobilisé entre les deux pattes 52.According to another embodiment illustrated for example on figures 4 or 5 , the upper end of the connecting element 7 comprises crenellations delimited here by two lugs 52 carried by the bearing 71, intended to extend the conduit 77. The tabs 52 hold the projecting element 5 centered in the axis of the leads 77 and away from its end. The projecting element 5 is then in the form of a solid cylinder whose diameter is substantially equal to, or slightly greater than, the separation distance of the two lugs 52, so that the projecting element is immobilized between the two legs 52.

Suivant ce mode de réalisation, même si l'élément en saillie 5 obture uniquement l'orifice de la membrane, le liquide peut s'introduire dans la cavité d'expansion 8.According to this embodiment, even if the projecting element 5 only closes the orifice of the membrane, the liquid can be introduced into the expansion cavity 8.

La cavité 8 peut ainsi être utilisée comme chambre de traitement du produit liquide. À cet effet, il pourrait être prévu d'y introduire un agent chimique ou biologique avec lequel le produit liquide pourrait interagir par contact mutuel ou dispersion. Cet agent pourrait être contenu dans la matière constitutive de l'élément en saillie 5 ou sur les parois de la cavité 8.The cavity 8 can thus be used as a treatment chamber for the liquid product. To this end, it could be planned to introduce a chemical or biological agent with which the liquid product could interact by mutual contact or dispersion. This agent could be contained in the constituent material of the projecting element 5 or on the walls of the cavity 8.

Afin de mieux visualiser l'espace occupé par le liquide en position de fermeture du clapet, les figures 6 à 8 illustrent chacune des vues en coupe de l'extrémité du piston suivant plusieurs plan transversaux. Ces figures illustrent chacune des zones occupées par le liquide quand l'élément en saillie 5 obture l'orifice 42 de la membrane 4.In order to better visualize the space occupied by the liquid in the closed position of the valve, the Figures 6 to 8 illustrate each sectional view of the end of the piston along several transverse planes. These figures illustrate each zone occupied by the liquid when the projecting element 5 closes the orifice 42 of the membrane 4.

La figure 8 est une vue en coupe suivant le plan C-C indiqué sur la figure 5. La figure 8 montre le liquide (grisé) occupant le conduit d'alimentation 77.The figure 8 is a sectional view along the plane CC indicated on the figure 5 . The figure 8 shows the fluid (grayed) occupying the supply duct 77.

La figure 7 est une vue en coupe suivant le plan D-D indiqué en figure 5. Cette figure montre que le liquide occupe tout le volume libre de la cavité 8 situé sous l'élément en saillie 5 et de part et d'autre de l'élément en saillie 5, entre les pattes de centrage 52.The figure 7 is a sectional view along the plane DD indicated in figure 5 . This figure shows that the liquid occupies the entire free volume of the cavity 8 located under the projecting element 5 and on either side of the projecting element 5, between the centering tabs 52.

Enfin, la figure 6 est une vue en coupe suivant le plan E-E indiqué en figure 5. Cette figure montre que le liquide occupe tout le volume libre de la cavité 8 situé de part et d'autre de l'élément en saillie 5, entre les pattes de centrage 52.Finally, figure 6 is a sectional view according to the EE plane indicated in figure 5 . This figure shows that the liquid occupies the entire free volume of the cavity 8 located on either side of the projecting element 5, between the centering tabs 52.

Les pattes de centrage 52 garantissent que l'élément en saillie 5 soit toujours centré sur l'axe du conduit d'alimentation 77, et également sur l'axe de l'orifice 42, pour assurer un flux régulier du liquide et une étanchéité optimale au niveau de l'orifice 42 de la membrane 4.The centering tabs 52 ensure that the projecting element 5 is always centered on the axis of the supply duct 77, and also on the axis of the orifice 42, to ensure a smooth flow of the liquid and an optimum seal at the orifice 42 of the membrane 4.

En outre, la position même des lèvres périphériques d'étanchéité 44 sur la jupe 43 de la membrane 4, renforce la capacité d'étanchéité de la membrane. En effet, plus ces lèvres 44 se trouvent à un niveau proche de l'épaulement 78, et plus les risques de déplacement et de désaxage de la membrane 4 par rapport à l'axe du conduit d'alimentation est réduit.In addition, the position of the peripheral sealing lips 44 on the skirt 43 of the membrane 4 reinforces the sealing capacity of the membrane. Indeed, the more these lips 44 are at a level close to the shoulder 78, and the risk of displacement and misalignment of the membrane 4 relative to the axis of the supply duct is reduced.

Aussi, l'étanchéité maximum est assurée par la combinaison des lèvres d'étanchéité 44 positionnées au voisinage de l'épaulement 78, d'une part, et des éléments de centrage 51 (ou 52) de l'élément en saillie 5 formant siège du clapet à l'extrémité du piston, d'autre part.Also, the maximum sealing is ensured by the combination of the sealing lips 44 positioned in the vicinity of the shoulder 78, on the one hand, and the centering elements 51 (or 52) of the projecting element 5 forming a seat from the valve to the end of the piston, on the other hand.

La description qui précède explique clairement comment l'invention permet d'assurer l'étanchéité au niveau de l'entrée de la chambre de dosage, en garantissant le calage radial de la membrane 4 lorsqu'un utilisateur appuie sur le bouton poussoir de la pompe.The foregoing description clearly explains how the invention makes it possible to ensure the sealing at the inlet of the metering chamber, by guaranteeing the radial wedging of the membrane 4 when a user presses the pushbutton of the pump. .

De plus, la description qui précède décrit clairement les moyens assurant l'évacuation de l'air compris dans la chambre de dosage pendant l'amorçage de la pompe.In addition, the above description clearly describes the means ensuring the evacuation of the air in the metering chamber during the priming of the pump.

La combinaison avantageuse des caractéristiques propres au dispositif selon l'invention permet d'offrir à l'Industrie pharmaceutique, et / ou cosmétique, une pompe :

  • qui délivre des doses précises de produit liquide, grâce à l'étanchéité renforcée entre la membrane et la chambre de dosage lorsque la pompe n'est pas utilisée ; et
  • qui s'amorce facilement grâce aux moyens mis en oeuvre pour évacuer l'air contenu dans la chambre de dosage avant une première utilisation.
The advantageous combination of the characteristics specific to the device according to the invention makes it possible to offer the pharmaceutical and / or cosmetic industry a pump:
  • which delivers precise doses of liquid product, thanks to the reinforced sealing between the membrane and the metering chamber when the pump is not used; and
  • which is easily initiated by the means used to evacuate the air in the metering chamber before first use.

Claims (15)

  1. Device for dispensing and intaking a liquid or semiliquid product by means of a dosage chamber (1) of a pump body (2), said device comprising a piston (3) which is mounted fixed in the pump body (2), said piston (3) comprising one end (31) inserted in a watertight manner in said chamber (1), the end (31) of the piston being covered with an elastically deformable membrane (4), characterised in that said membrane (4) comprises, on the one hand, a transversal wall (41) forming an intake valve being provided with a central supply orifice (42) capable of being blocked in a watertight manner by a projecting element (5) forming a valve seat on the end of the piston (3) and, on the other hand, a cylindrical attachment skirt (43) equipped with at least one sealing peripheral lip (44) in sliding contact with the inner wall of the chamber (1), said skirt forming a valve by deformation in contact with a boss (6) provided on the inner wall of the chamber (1), for releasing the air compressed by said piston (3) in the chamber (1) when priming the pump.
  2. Device according to claim 1, characterised in that said boss consists of at least one axial rib (6) projecting on the inner wall of said chamber (1).
  3. Device according to claim 1 or 2, characterised in that the projecting element (5) consists of a ball mobile between a valve closing position and an opening position in which it allows the liquid product to enter said chamber (1).
  4. Device according to any one of the preceding claims, characterised in that it comprises elements for centring (51, 52) the projecting element (5) in the axis of said supply orifice (42).
  5. Device according to any one of the claims from 1 to 4, characterised in that the bottom face of the transversal wall (41) of said membrane (4) comprises an annular pad (45) centred on said central orifice (42), and coming to rest against said element (5) projecting from the end of the piston (3) in the valve closing position.
  6. Device according to any one of the preceding claims, characterised in that it comprises an element for connecting (7) said piston (3) to said pump body (2), equipped with a bearing for retaining (71) said membrane (4).
  7. Device according to claim 6, characterised in that said retaining bearing (71) comprises means for snap-fitting (72, 73) the skirt of said membrane.
  8. Device according to claim 7, characterised in that the snap-fitting means consist of a peripheral groove (72), made in the lateral wall of said element (7) and cooperating with a snap-fitting bead (73) provided on the inner wall of the skirt.
  9. Device according to any one of the claims from 6 to 8, characterised in that said connection element (7) is an independent part, designed to be added to the bottom part of said pump body (2).
  10. Device according to any one of the claims from 6 to 9, characterised in that said connection element (7) comprises a transversal wall (74) forming a bottom, designed for blocking said body (2) at the bottom.
  11. Device according to any one of the claims from 6 to 10, characterised in that said connection element (7) comprises a cylindrical bore (75) in which a tube (76) for intaking said product is inserted.
  12. Device according to claim 11, characterised in that said retaining bearing (71) of the connection element (7) comprises an axial supply conduit (77), communicating at the bottom with the cylindrical bore (75).
  13. Device according to any one of the claims from 6 to 12, characterised in that said connection element (7) comprises a peripheral shoulder (78) against which the bottom edge of said skirt (43) of said membrane (4) comes to a stop.
  14. Device according to claim 13, characterised in that said peripheral sealing lip (44) is provided in the proximity of said peripheral shoulder (78).
  15. Device according to any one of the preceding claims, characterised in that it comprises an expansion cavity (8) in which the projecting element (5) of the end of the piston (3) is inserted.
EP06726250.1A 2005-05-20 2006-03-14 Liquid product dispensing and receiving device Not-in-force EP1881936B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0551309A FR2885890B1 (en) 2005-05-20 2005-05-20 DEVICE FOR DELIVERING AND ADMITTING A LIQUID PRODUCT
PCT/FR2006/050228 WO2006123074A1 (en) 2005-05-20 2006-03-14 Liquid product dispensing and receiving device

Publications (2)

Publication Number Publication Date
EP1881936A1 EP1881936A1 (en) 2008-01-30
EP1881936B1 true EP1881936B1 (en) 2013-05-15

Family

ID=35520828

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06726250.1A Not-in-force EP1881936B1 (en) 2005-05-20 2006-03-14 Liquid product dispensing and receiving device

Country Status (6)

Country Link
US (2) US7866513B2 (en)
EP (1) EP1881936B1 (en)
JP (1) JP4966966B2 (en)
CN (1) CN101180225B (en)
FR (1) FR2885890B1 (en)
WO (1) WO2006123074A1 (en)

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US9604836B2 (en) * 2012-05-25 2017-03-28 Vitop Moulding S.R.L. System for the controlled tapping of liquids from containers
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Also Published As

Publication number Publication date
US7866513B2 (en) 2011-01-11
JP2008540010A (en) 2008-11-20
US8430275B2 (en) 2013-04-30
CN101180225B (en) 2010-07-14
CN101180225A (en) 2008-05-14
EP1881936A1 (en) 2008-01-30
JP4966966B2 (en) 2012-07-04
WO2006123074A1 (en) 2006-11-23
US20080116227A1 (en) 2008-05-22
FR2885890B1 (en) 2007-07-20
FR2885890A1 (en) 2006-11-24
US20110089198A1 (en) 2011-04-21

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