EP2139605B1 - Pump for distributing liquid product and dispenser comprising such a pump - Google Patents

Pump for distributing liquid product and dispenser comprising such a pump Download PDF

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Publication number
EP2139605B1
EP2139605B1 EP08775703A EP08775703A EP2139605B1 EP 2139605 B1 EP2139605 B1 EP 2139605B1 EP 08775703 A EP08775703 A EP 08775703A EP 08775703 A EP08775703 A EP 08775703A EP 2139605 B1 EP2139605 B1 EP 2139605B1
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EP
European Patent Office
Prior art keywords
pump
ferrule
actuator rod
leaktight manner
operates
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EP08775703A
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German (de)
French (fr)
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EP2139605A1 (en
Inventor
François LEMANER
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Aptar France SAS
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Valois SAS
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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
    • B05B11/0005—Components or details
    • B05B11/0037—Containers
    • B05B11/0039—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means
    • B05B11/0044—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means
    • 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
    • B05B11/105—Sealing arrangements around pump actuating stem
    • 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
    • B05B11/1016—Piston pumps the outlet valve having a valve seat located downstream a movable valve element controlled by a pressure actuated controlling element
    • B05B11/1018—Piston pumps the outlet valve having a valve seat located downstream a movable valve element controlled by a pressure actuated controlling element and the controlling element cooperating with means for opening or closing the inlet valve

Definitions

  • the present invention relates to a fluid dispenser pump and a dispenser comprising such a pump.
  • Fluid dispensing pumps are well known in the state of the art. There are different types, including so-called atmospheric pumps, in which the depression created inside the tank by the distribution of a dose of product is compensated by venting air penetrating inside the device from the outside.
  • this type of pump there is generally a ferrule fitted into the pump body and which cooperates sealingly with the piston in the rest position, firstly to define the rest position of the piston, and secondly to seal the pump and thus avoid any risk of leakage, for example when the device on which the pump is assembled is stored in an inverted position with the pump located below the tank.
  • This static seal between the ferrule and the piston is fragile because generally consists solely of an annular contact between the edge of the inner diameter of the ferrule and the cone of the piston.
  • the fixing ring, snap-in, crimpable or screwable, used to fix the pump on the tank must also cooperate sealingly with the ferrule, and to do this is generally provided a seal.
  • This can be disadvantageous from a point of view of the complexity of the assembly of the pump, and therefore from the point of view of manufacturing and assembly costs thereof.
  • the documents EP-1 466 669 , EP-1 609 529 and U.S. 4,249,676 describe devices of the prior art according to the preamble of claim 1.
  • the present invention aims to provide a fluid dispensing pump that does not reproduce the aforementioned drawbacks.
  • the present invention aims to provide a fluid dispensing pump which substantially reduces the risk of leakage in the rest position of the pump.
  • the present invention also aims to provide a fluid dispensing pump that allows to define accurately and sustainably the rest position of the pump, even after a large number of uses thereof.
  • the present invention also aims to provide a fluid dispenser pump that is simple and inexpensive to manufacture and assemble.
  • the present invention therefore relates to a fluid dispenser pump according to claim 1.
  • said actuating rod comprises a lower part of larger diameter and a smaller diameter upper part, said lower and upper parts being connected by a part joining said ferrule cooperating sealingly with said lower part of larger diameter during the displacement of said actuating rod between the rest position and the intermediate position, and said ferrule cooperating unsealed with said upper part of more small diameter when moving the actuating rod between the intermediate position and the actuating position, said non-sealed cooperation between the ferrule and the actuating rod for venting the pump.
  • said ferrule cooperates sealingly with the actuating rod, between the rest and intermediate positions, by an elastically deformable contact zone, which at rest at an inside diameter greater than the outside diameter of said smaller diameter upper part. of the actuating rod, and an inner diameter smaller than the outer diameter of said lower portion of larger diameter of the actuating rod, so that said contact zone is elastically deformed outwardly when cooperating in a manner sealed with said lower part of larger diameter.
  • said junction zone is frustoconical, to facilitate the passage of said contact zone of the ferrule on said lower part of larger diameter.
  • said shell comprises a shoulder, preferably frustoconical, adapted to form a stop with a junction portion, preferably frustoconical, of the actuating rod, to define the rest position of the piston.
  • said ferrule comprises a radial flange which rests on the upper end edge of the pump body, and an axial sleeve which extends at least partially inside said pump body, the lower end of which forms a zone contact which cooperates with said actuating rod.
  • said radial flange supports a seal cooperating in a sealed manner with said ferrule and with a fixing ring adapted to fix the pump on a tank containing fluid to be dispensed.
  • said radial flange cooperates sealingly with a fixing ring adapted to fix the pump on a reservoir containing fluid to be dispensed.
  • said radial flange comprises a sealing profile on its upper axial surface which cooperates sealingly with the fixing ring.
  • said radial flange comprises at least one sealing lip on its radially outer edge which cooperates sealingly with the fixing ring.
  • said ferrule is made of a relatively flexible material, such as a material comprising low density polyethylene (LDPE).
  • LDPE low density polyethylene
  • the present invention also relates to a fluid dispenser device comprising a reservoir containing fluid, and a pump as described above, said pump being assembled on said reservoir by means of a fixing ring.
  • the device comprises a reservoir 1 provided with a neck 2, a pump 10 being assembled on said neck 2 of the reservoir 1 by means of a fixing ring 5, preferably with the interposition of a seal 9, called seal of col.
  • the pump comprises a pump body 11 provided with an upper end edge 12.
  • a piston 20 slides sealingly inside said pump body 11 at each actuation to dispense a dose of product from the tank 1.
  • the internal structure of the pump will not be described in more detail below, because the present invention applies to all types of pumps, and is in no way limited by the specific characteristics of the pump given as example on figures 1 and 2 .
  • the piston 20 is integral, in particular one-piece, as shown in the drawings, with an actuating rod 30 on which a dispensing head or pusher (not shown) assembles on which the user will directly or indirectly to operate the pump.
  • a ferrule 40 is assembled inside the pump body 11, and cooperates with the piston 20 to define the rest position thereof.
  • the ferrule 40 supports a seal 50 adapted to achieve the seal between the ferrule 40 and the fixing ring 5.
  • This fixing ring 5 can be any, including crimpable as shown in the drawings, but it could also be snap-on, screwable or any other suitable fixing ring.
  • the pump shown is a so-called atmospheric pump, that is to say that in the rest position, it is sealed against the atmosphere, but when actuated, the product dispensed out of tank must be replaced by a corresponding amount of air coming from the outside, so that there is a venting system in the pump.
  • the ferrule 40 cooperates sealingly with the actuating rod 30 when the actuating rod moves between the rest position represented on the figure 1 is an intermediate position, and said ferrule 40 no longer cooperates sealingly with the actuating rod 30 between said intermediate position and the actuating position represented on the figure 2 .
  • the venting system is open in a conventional manner.
  • the ferrule 40 comprises a radial flange 45 which rests on the upper edge 12 of the pump body 11.
  • the ferrule 40 also comprises an axial sleeve 44 which at least partially penetrates inside the pump body.
  • the actuating rod 30 comprises a lower portion 31 of larger diameter and an upper portion 32 of smaller diameter, said lower and upper portions 31, 32 being connected by a junction portion 33, preferably frustoconical.
  • the contact zone 41 of the ferrule 40 cooperates sealingly with said lower portion 31 of larger diameter, whereas when this contact zone 41 reaches the intermediate position, it becomes is then at the junction zone 33, and it then no longer cooperates sealingly with the actuating rod, at the upper portion 32 of smaller diameter, allowing the opening of the venting system.
  • this junction portion 33 is preferably frustoconical.
  • the ferrule 40 comprises a shoulder 43, preferably frustoconical, preferably of a shape corresponding to the junction portion 33 of the actuating rod, and which is adapted to form a stop with this junction portion 33 of the rod actuator 30, thereby to define the rest position of the piston 20.
  • This rest position which is shown on the figure 1 is therefore very precisely definable, and in this rest position there is no longer any contact between the piston 20 and the ferrule 40. There is therefore no risk that even slight deformation of the piston 20 causes a modification the rest position of the pump.
  • the outer lateral surface 46 of the axial sleeve 44 of the shell 40 cooperates in a non-sealing manner with the inside of the pump body 11.
  • the venting path can flow between the shell and the body of the pump. pump, then around the upper edge of the pump body, and between the outside of the pump body and the fixing ring into the reservoir.
  • the outer side surface 46 and the lower surface of the radial flange 45 may include a vent groove.
  • the sealed contact zone 41 is elastically deformable, and comprises at rest, that is to say in an unstressed position, which corresponds to the actuating position of the pump represented on the figure 2 , an inner diameter greater than the outer diameter of the upper portion 32 of smaller diameter of the actuating rod 30.
  • the inside diameter of the contact zone 41 is preferably smaller than the outside diameter of the lower portion 31 of larger diameter of the actuating rod 30.
  • the actuating rod 30 could be of constant outside diameter over the actuating stroke, but could comprise one or more grooves, advantageously axial, from which the cooperation between the rod of actuation and the ferrule is no longer waterproof.
  • Other variants are also conceivable, as long as an intermediate position is defined in the actuating stroke, before which the ferrule cooperates sealingly with the rod, and after which there is no longer sealing.
  • the figure 3 represents a detailed view of the pump shown on the figures 1 and 2 .
  • the figure 4 shows another variant embodiment, in which there is no seal 50 provided between the ferrule and the fixing ring 5.
  • it is the radial flange 45 of the ferrule 40, which has on its surface upper axial sealing profile which cooperates sealingly with the fixing ring 5.
  • This sealing profile may comprise one or more beads as shown in the figure, and could take any form suitable for sealing.
  • the figure 5 shows another variant embodiment in which it is the radially outer edge of the radial flange 45 of the ferrule 40 which comprises at least one sealing lip 49 adapted to cooperate in a manner The sealing ring with the fixing ring 5.
  • other sealing profiles could be provided at this level.
  • the ferrule in a relatively flexible material which makes it possible to produce good seals, for example a material comprising LDPE low density polyethylene.
  • a material comprising LDPE low density polyethylene will be particularly advantageous to allow the creation of the seal at the contact zone 41 when it cooperates sealingly with the actuating rod, and in particular to allow its deformation in the mode of where it would be of smaller dimensions than the lower part of larger diameter 31 of the actuating rod 30.
  • the LDPE also promotes sealing with the fixing ring in the variants of the Figures 4 and 5 .
  • the seamless embodiments 50 are also advantageous in that they allow an improvement in the positional accuracy of the fixing ring relative to the pump, due to the lower axial compressibility related to the absence of the seal.

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  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Description

La présente invention concerne une pompe de distribution de produit fluide et un distributeur comportant une telle pompe.The present invention relates to a fluid dispenser pump and a dispenser comprising such a pump.

Les pompes de distribution de produit fluide sont bien connues dans l'état de la technique. Il en existe différentes sortes, et notamment les pompes dites atmosphériques, dans lesquelles la dépression créée à l'intérieur du réservoir par la distribution d'une dose de produit est compensée par de l'air d'éventation pénétrant à l'intérieur du dispositif depuis l'extérieur. Dans ce type de pompe, il y a généralement une virole emmanchée dans le corps de pompe et qui coopère de manière étanche avec le piston en position de repos, d'une part pour définir la position de repos du piston, et d'autre part pour fermer de manière étanche la pompe et ainsi éviter tout risque de fuite, par exemple lorsque le dispositif sur lequel la pompe est assemblée est stocké dans une position inversée avec la pompe située en dessous du réservoir. Cette étanchéité statique entre la virole et le piston est fragile car généralement constituée uniquement d'un contact annulaire entre l'arête du diamètre interne de la virole et le cône du piston. Lorsqu'une contrainte est appliquée sur le piston, par exemple sur la tige d'actionnement, cette étanchéité est rapidement détruite, quelques centièmes de millimètres étant suffisants pour ouvrir le système d'éventation de la pompe et donc entraîner un risque de fuite si le dispositif est stocké sur le côté ou la tête en bas. De même, dans ce type de pompe, la maîtrise de la position de repos de la pompe, également appelée point mort haut, peut être difficile, car la définition de cette position est réalisée par contact entre le piston et la virole avec au fur et à mesure des utilisations, des risques de déformation de l'une ou de l'autre de ces pièces et ainsi une légère modification de la définition de cette position. Par ailleurs, la bague de fixation, encliquetable, sertissable ou vissable, utilisée pour fixer la pompe sur le réservoir doit également coopérer de manière étanche avec la virole, et pour ce faire on prévoit généralement un joint d'étanchéité. Ceci peut être désavantageux d'un point de vue de la complexité de l'assemblage de la pompe, et donc d'un point de vue des coûts de fabrication et d'assemblage de celle-ci. Les documents EP-1 466 669 , EP-1 609 529 et US-4 249 676 décrivent des dispositifs de l'art antérieur selon le préambule de la revendication 1.Fluid dispensing pumps are well known in the state of the art. There are different types, including so-called atmospheric pumps, in which the depression created inside the tank by the distribution of a dose of product is compensated by venting air penetrating inside the device from the outside. In this type of pump, there is generally a ferrule fitted into the pump body and which cooperates sealingly with the piston in the rest position, firstly to define the rest position of the piston, and secondly to seal the pump and thus avoid any risk of leakage, for example when the device on which the pump is assembled is stored in an inverted position with the pump located below the tank. This static seal between the ferrule and the piston is fragile because generally consists solely of an annular contact between the edge of the inner diameter of the ferrule and the cone of the piston. When a stress is applied to the piston, for example on the actuating rod, this seal is quickly destroyed, a few hundredths of a millimeter being sufficient to open the venting system of the pump and thus entail a risk of leakage if the device is stored on the side or upside down. Similarly, in this type of pump, control of the rest position of the pump, also called top dead center, can be difficult because the definition of this position is achieved by contact between the piston and the ferrule with as and when as the uses, the risk of deformation of one or the other of these parts and thus a slight modification of the definition of this position. Furthermore, the fixing ring, snap-in, crimpable or screwable, used to fix the pump on the tank must also cooperate sealingly with the ferrule, and to do this is generally provided a seal. This can be disadvantageous from a point of view of the complexity of the assembly of the pump, and therefore from the point of view of manufacturing and assembly costs thereof. The documents EP-1 466 669 , EP-1 609 529 and U.S. 4,249,676 describe devices of the prior art according to the preamble of claim 1.

La présente invention a pour but de fournir une pompe de distribution de produit fluide qui ne reproduit pas les inconvénients susmentionnés.The present invention aims to provide a fluid dispensing pump that does not reproduce the aforementioned drawbacks.

La présente invention a pour but de fournir une pompe de distribution de produit fluide qui diminue sensiblement les risques de fuite en position de repos de la pompe.The present invention aims to provide a fluid dispensing pump which substantially reduces the risk of leakage in the rest position of the pump.

La présente invention a aussi pour but de fournir une pompe de distribution de produit fluide qui permet de définir avec précision et de manière durable la position de repos de la pompe, même après un grand nombre d'utilisations de celle-ci.The present invention also aims to provide a fluid dispensing pump that allows to define accurately and sustainably the rest position of the pump, even after a large number of uses thereof.

La présente invention a également pour but de fournir une pompe de distribution de produit fluide qui soit simple et peu coûteuse à fabriquer et à assembler.The present invention also aims to provide a fluid dispenser pump that is simple and inexpensive to manufacture and assemble.

La présente invention a donc pour objet une pompe de distribution de produit fluide selon la revendication 1.The present invention therefore relates to a fluid dispenser pump according to claim 1.

Avantageusement, ladite tige d'actionnement comporte une partie inférieure de plus grand diamètre et une partie supérieure de plus petit diamètre, lesdites parties inférieure et supérieure étant reliées par une partie de jonction, ladite virole coopérant de manière étanche avec ladite partie inférieure de plus grand diamètre lors du déplacement de ladite tige d'actionnement entre la position de repos et la position intermédiaire, et ladite virole coopérant de manière non étanche avec ladite partie supérieure de plus petit diamètre lors du déplacement de la tige d'actionnement entre la position intermédiaire et la position d'actionnement, ladite coopération non étanche entre la virole et la tige d'actionnement permettant l'éventation de la pompe.Advantageously, said actuating rod comprises a lower part of larger diameter and a smaller diameter upper part, said lower and upper parts being connected by a part joining said ferrule cooperating sealingly with said lower part of larger diameter during the displacement of said actuating rod between the rest position and the intermediate position, and said ferrule cooperating unsealed with said upper part of more small diameter when moving the actuating rod between the intermediate position and the actuating position, said non-sealed cooperation between the ferrule and the actuating rod for venting the pump.

Avantageusement, ladite virole coopère de manière étanche avec la tige d'actionnement, entre les positions de repos et intermédiaire, par une zone de contact élastiquement déformable, qui au repos à un diamètre intérieur supérieur au diamètre extérieur de ladite partie supérieure de plus petit diamètre de la tige d'actionnement, et un diamètre intérieur inférieur au diamètre extérieur de ladite partie inférieure de plus grand diamètre de la tige d'actionnement, de sorte que ladite zone de contact est élastiquement déformée vers l'extérieur lorsqu'elle coopère de manière étanche avec ladite partie inférieure de plus grand diamètre.Advantageously, said ferrule cooperates sealingly with the actuating rod, between the rest and intermediate positions, by an elastically deformable contact zone, which at rest at an inside diameter greater than the outside diameter of said smaller diameter upper part. of the actuating rod, and an inner diameter smaller than the outer diameter of said lower portion of larger diameter of the actuating rod, so that said contact zone is elastically deformed outwardly when cooperating in a manner sealed with said lower part of larger diameter.

Avantageusement, ladite zone de jonction est tronconique, pour faciliter le passage de ladite zone de contact de la virole sur ladite partie inférieure de plus grand diamètre.Advantageously, said junction zone is frustoconical, to facilitate the passage of said contact zone of the ferrule on said lower part of larger diameter.

Avantageusement, ladite virole comporte un épaulement, de préférence tronconique, adapté à former une butée avec une partie de jonction, de préférence tronconique, de la tige d'actionnement, pour définir la position de repos du piston.Advantageously, said shell comprises a shoulder, preferably frustoconical, adapted to form a stop with a junction portion, preferably frustoconical, of the actuating rod, to define the rest position of the piston.

Avantageusement, ladite virole comporte une bride radiale qui repose sur le bord d'extrémité supérieure du corps de pompe, et un manchon axial qui s'étend au moins partiellement à l'intérieur dudit corps de pompe, dont l'extrémité inférieure forme une zone de contact qui coopère avec ladite tige d'actionnement.Advantageously, said ferrule comprises a radial flange which rests on the upper end edge of the pump body, and an axial sleeve which extends at least partially inside said pump body, the lower end of which forms a zone contact which cooperates with said actuating rod.

Selon une première variante de réalisation, ladite bride radiale supporte un joint coopérant de manière étanche avec ladite virole et avec une bague de fixation adaptée à fixer la pompe sur un réservoir contenant du produit fluide à distribuer.According to a first variant embodiment, said radial flange supports a seal cooperating in a sealed manner with said ferrule and with a fixing ring adapted to fix the pump on a tank containing fluid to be dispensed.

Selon une seconde variante de réalisation, ladite bride radiale coopère de manière étanche avec une bague de fixation adaptée à fixer la pompe sur un réservoir contenant du produit fluide à distribuer.According to a second variant embodiment, said radial flange cooperates sealingly with a fixing ring adapted to fix the pump on a reservoir containing fluid to be dispensed.

Avantageusement, ladite bride radiale comporte un profil d'étanchéité sur sa surface axiale supérieure qui coopère de manière étanche avec la bague de fixation.Advantageously, said radial flange comprises a sealing profile on its upper axial surface which cooperates sealingly with the fixing ring.

Avantageusement, ladite bride radiale comporte au moins une lèvre d'étanchéité sur son bord radialement externe qui coopère de manière étanche avec la bague de fixation.Advantageously, said radial flange comprises at least one sealing lip on its radially outer edge which cooperates sealingly with the fixing ring.

Avantageusement, ladite virole est réalisée en un matériau relativement souple, tel qu'un matériau comprenant du polyéthylène basse densité (PEBD).Advantageously, said ferrule is made of a relatively flexible material, such as a material comprising low density polyethylene (LDPE).

La présente invention a également pour objet un dispositif de distribution de produit fluide, comportant un réservoir contenant du produit fluide, et une pompe telle que décrite ci-dessus, ladite pompe étant assemblée sur ledit réservoir au moyen d'une bague de fixation.The present invention also relates to a fluid dispenser device comprising a reservoir containing fluid, and a pump as described above, said pump being assembled on said reservoir by means of a fixing ring.

D'autres caractéristiques et avantages de la présente invention apparaîtront plus clairement au cours de la description détaillée suivante de plusieurs modes de réalisation de celle-ci, faite en référence aux dessins joints, donnés à titre d'exemples non limitatifs, et sur lesquels :

  • la figure 1 est une vue schématique en section transversale d'un dispositif de distribution de produit fluide comportant une pompe de distribution de produit fluide selon un mode de réalisation avantageux de la présente invention, en position de repos,
  • la figure 2 est une vue similaire à celle de la figure 1, en position d'actionnement de la pompe,
  • la figure 3 est une vue de détail de la coopération entre la virole et la tige d'actionnement, en position de repos de la pompe, selon une première variante de réalisation de l'invention,
  • la figure 4 est une vue similaire à celle de la figure 3, montrant une autre variante de réalisation de la présente invention, et
  • la figure 5 montre encore une autre variante de réalisation de la présente invention.
Other features and advantages of the present invention will emerge more clearly in the following detailed description of several embodiments thereof, with reference to the accompanying drawings, given by way of non-limiting examples, and in which:
  • the figure 1 is a schematic cross-sectional view of a fluid product dispensing device comprising a fluid dispenser pump according to an advantageous embodiment of the present invention, in the rest position,
  • the figure 2 is a view similar to that of the figure 1 in the actuating position of the pump,
  • the figure 3 is a detailed view of the cooperation between the shell and the actuating rod, in the rest position of the pump, according to a first embodiment of the invention,
  • the figure 4 is a view similar to that of the figure 3 showing another alternative embodiment of the present invention, and
  • the figure 5 shows yet another alternative embodiment of the present invention.

En référence aux figures 1 et 2, il est représenté un dispositif de distribution de produit fluide selon un mode de réalisation avantageux de la présente invention. Le dispositif comporte un réservoir 1 pourvu d'un col 2, une pompe 10 étant assemblée sur ledit col 2 du réservoir 1 au moyen d'une bague de fixation 5, de préférence avec interposition d'un joint d'étanchéité 9, appelé joint de col. La pompe comporte un corps de pompe 11 pourvu d'un bord d'extrémité supérieur 12. Un piston 20 coulisse de manière étanche à l'intérieur dudit corps de pompe 11 à chaque actionnement pour distribuer une dose de produit à partir du réservoir 1. La structure interne de la pompe ne sera pas décrite plus amplement en détail ci-après, car la présente invention s'applique à tous types de pompes, et n'est en aucun cas limitée par les caractéristiques spécifiques de la pompe donnée à titre d'exemple sur les figures 1 et 2. De manière classique, le piston 20 est solidaire, notamment monobloc, comme représenté sur les dessins, d'une tige d'actionnement 30 sur laquelle s'assemble une tête de distribution ou poussoir (non représentée) sur laquelle l'utilisateur appuiera directement ou indirectement pour actionner la pompe. Une virole 40 est assemblée à l'intérieur du corps de pompe 11, et coopère avec le piston 20 pour définir la position de repos de celui-ci. Dans l'exemple des figures 1 et 2, la virole 40 supporte un joint d'étanchéité 50 adapté à réaliser l'étanchéité entre la virole 40 et la bague de fixation 5. Cette bague de fixation 5 peut être quelconque, notamment sertissable comme représenté sur les dessins, mais elle pourrait également être encliquetable, vissable ou tout autre bague de fixation appropriée.With reference to figures 1 and 2 , there is shown a fluid dispenser device according to an advantageous embodiment of the present invention. The device comprises a reservoir 1 provided with a neck 2, a pump 10 being assembled on said neck 2 of the reservoir 1 by means of a fixing ring 5, preferably with the interposition of a seal 9, called seal of col. The pump comprises a pump body 11 provided with an upper end edge 12. A piston 20 slides sealingly inside said pump body 11 at each actuation to dispense a dose of product from the tank 1. The internal structure of the pump will not be described in more detail below, because the present invention applies to all types of pumps, and is in no way limited by the specific characteristics of the pump given as example on figures 1 and 2 . In a conventional manner, the piston 20 is integral, in particular one-piece, as shown in the drawings, with an actuating rod 30 on which a dispensing head or pusher (not shown) assembles on which the user will directly or indirectly to operate the pump. A ferrule 40 is assembled inside the pump body 11, and cooperates with the piston 20 to define the rest position thereof. In the example of figures 1 and 2 , the ferrule 40 supports a seal 50 adapted to achieve the seal between the ferrule 40 and the fixing ring 5. This fixing ring 5 can be any, including crimpable as shown in the drawings, but it could also be snap-on, screwable or any other suitable fixing ring.

La pompe représentée est une pompe dite atmosphérique, c'est-à-dire qu'en position de repos, elle est fermée de manière étanche vis-à-vis de l'atmosphère, mais lors de l'actionnement, le produit distribué hors du réservoir doit être remplacé par une quantité d'air correspondant venant de l'extérieur, de sorte qu'il est prévu un système d'éventation dans la pompe.The pump shown is a so-called atmospheric pump, that is to say that in the rest position, it is sealed against the atmosphere, but when actuated, the product dispensed out of tank must be replaced by a corresponding amount of air coming from the outside, so that there is a venting system in the pump.

Selon l'invention, la virole 40 coopère de manière étanche avec la tige d'actionnement 30 lorsque la tige d'actionnement se déplace entre la position de repos représentée sur la figure 1 est une position intermédiaire, et ladite virole 40 ne coopère plus de manière étanche avec la tige d'actionnement 30 entre ladite position intermédiaire et la position d'actionnement représentée sur la figure 2. Ainsi, lorsque la coopération entre la virole 40 et la tige d'actionnement 30 n'est plus étanche, le système d'éventation est ouvert de manière classique.According to the invention, the ferrule 40 cooperates sealingly with the actuating rod 30 when the actuating rod moves between the rest position represented on the figure 1 is an intermediate position, and said ferrule 40 no longer cooperates sealingly with the actuating rod 30 between said intermediate position and the actuating position represented on the figure 2 . Thus, when the cooperation between the ferrule 40 and the actuating rod 30 is no longer sealed, the venting system is open in a conventional manner.

Dans le mode de réalisation représenté sur les figures 1 et 2, la virole 40 comporte une bride radiale 45 qui repose sur le bord supérieur 12 du corps de pompe 11. La virole 40 comporte également un manchon axial 44 qui pénètre au moins partiellement à l'intérieur du corps de pompe. Une partie de ce manchon axial 44, de préférence son extrémité inférieure, dans la position représentée sur les figures 1 et 2, forme une zone de contact 41 qui est adaptée à coopérer de manière étanche avec ladite tige d'actionnement 30 entre les positions de repos et intermédiaire, tel que décrit ci-dessus. Avantageusement, la tige d'actionnement 30 comporte une partie inférieure 31 de plus grand diamètre et une partie supérieure 32 de plus petit diamètre, lesdites parties inférieures et supérieures 31, 32 étant reliées par une partie de jonction 33, de préférence tronconique. Ainsi, entre la position de repos et la position intermédiaire, la zone de contact 41 de la virole 40 coopère de manière étanche avec ladite partie inférieure 31 de plus grand diamètre, alors que lorsque cette zone de contact 41 atteint la position intermédiaire, elle se trouve alors au niveau de la zone de jonction 33, et elle ne coopère plus ensuite de manière étanche avec la tige d'actionnement, au niveau de la partie supérieure 32 de plus petit diamètre, permettant l'ouverture du système d'éventation. Afin de faciliter le passage de cette zone de contact 41 sur la partie de plus grand diamètre 31, cette partie de jonction 33 est de préférence tronconique.In the embodiment shown on the figures 1 and 2 , the ferrule 40 comprises a radial flange 45 which rests on the upper edge 12 of the pump body 11. The ferrule 40 also comprises an axial sleeve 44 which at least partially penetrates inside the pump body. A part of this axial sleeve 44, preferably its lower end, in the position shown on the figures 1 and 2 , forms a contact zone 41 which is adapted to cooperate sealingly with said actuating rod 30 between the rest and intermediate positions, as described above. Advantageously, the actuating rod 30 comprises a lower portion 31 of larger diameter and an upper portion 32 of smaller diameter, said lower and upper portions 31, 32 being connected by a junction portion 33, preferably frustoconical. Thus, between the rest position and the intermediate position, the contact zone 41 of the ferrule 40 cooperates sealingly with said lower portion 31 of larger diameter, whereas when this contact zone 41 reaches the intermediate position, it becomes is then at the junction zone 33, and it then no longer cooperates sealingly with the actuating rod, at the upper portion 32 of smaller diameter, allowing the opening of the venting system. In order to facilitate the passage of this contact zone 41 on the part of larger diameter 31, this junction portion 33 is preferably frustoconical.

Ainsi, en début d'actionnement, lorsque la pompe part de sa position de repos représentée sur la figure 1, la zone de contact 41 de la virole va glisser de manière étanche contre la partie inférieure de plus grand diamètre 31 de la tige d'actionnement. Ce n'est que lorsque la tige d'actionnement atteint la position intermédiaire, qui peut avantageusement être relativement proche de la position d'actionnement, que le système d'éventation est ouvert au moment où la zone de contact 41 de la virole ne coopérera plus de manière étanche avec la tige d'actionnement 30.Thus, at the beginning of actuation, when the pump starts from its rest position represented on the figure 1 , the contact zone 41 of the ferrule will slide sealingly against the lower portion of larger diameter 31 of the actuating rod. Only when the actuating rod reaches the intermediate position, which may advantageously be relatively close to the actuating position, the venting system is open at the moment when the contact zone 41 of the ferrule will not cooperate. more tightly with the actuating rod 30.

De préférence, la virole 40 comporte un épaulement 43, de préférence tronconique, de préférence de forme correspondante à la partie de jonction 33 de la tige d'actionnement, et qui est adapté à former une butée avec cette partie de jonction 33 de la tige d'actionnement 30, pour ainsi définir la position de repos du piston 20. Cette position de repos qui est représentée sur la figure 1 est donc très précisément définissable, et dans cette position de repos il n'y a plus aucun contact entre le piston 20 et la virole 40. Il n'y a donc plus de risque qu'une déformation même légère du piston 20 provoque une modification de la position de repos de la pompe. Au contraire, et comme cela est plus clairement visible sur les figures 3, 4 et 5, la coopération cône sur cône de la partie de jonction 33 de la tige d'actionnement 30 avec l'épaulement 43 de la virole 40 permet de définir une position nette et précise de repos de la pompe, et ce même après un grand nombre d'utilisation de celle-ci.Preferably, the ferrule 40 comprises a shoulder 43, preferably frustoconical, preferably of a shape corresponding to the junction portion 33 of the actuating rod, and which is adapted to form a stop with this junction portion 33 of the rod actuator 30, thereby to define the rest position of the piston 20. This rest position which is shown on the figure 1 is therefore very precisely definable, and in this rest position there is no longer any contact between the piston 20 and the ferrule 40. There is therefore no risk that even slight deformation of the piston 20 causes a modification the rest position of the pump. On the contrary, and as is more clearly visible on the Figures 3, 4 and 5 , cone-cone cooperation of the junction portion 33 of the actuating rod 30 with the shoulder 43 of the ferrule 40 allows to define a clear and precise rest position of the pump, even after a large number of use of it.

Avantageusement, la surface latérale externe 46 du manchon axial 44 de la virole 40 coopère de manière non-étanche avec l'intérieur du corps de pompe 11. En particulier, le chemin d'éventation peut s'écouler entre la virole et le corps de pompe, puis autour du bord supérieur du corps de pompe, puis entre l'extérieur du corps de pompe et la bague de fixation jusque dans le réservoir. Par exemple, la surface latérale externe 46 et la surface inférieure de la bride radiale 45 peuvent comporter une rainure d'éventation.Advantageously, the outer lateral surface 46 of the axial sleeve 44 of the shell 40 cooperates in a non-sealing manner with the inside of the pump body 11. In particular, the venting path can flow between the shell and the body of the pump. pump, then around the upper edge of the pump body, and between the outside of the pump body and the fixing ring into the reservoir. For example, the outer side surface 46 and the lower surface of the radial flange 45 may include a vent groove.

Avantageusement, la zone de contact étanche 41 est élastiquement déformable, et comporte au repos, c'est-à-dire dans une position non contrainte, qui correspond à la position d'actionnement de la pompe représentée sur la figure 2, un diamètre intérieur supérieur au diamètre extérieur de la partie supérieure 32 de plus petit diamètre de la tige d'actionnement 30. Ceci est visible sur la figure 2, et permet donc de laisser passer de l'air entre la zone de contact 41 et la tige d'actionnement lorsque celle-ci se trouve dans la position de coopération non étanche, c'est-à-dire entre la position intermédiaire et la position d'actionnement de la pompe. Par contre, le diamètre intérieur de la zone de contact 41 est de préférence inférieur au diamètre extérieur de la partie inférieure 31 de plus grand diamètre de la tige d'actionnement 30. Ainsi, lorsque ladite zone de contact 41 coopère avec ladite partie inférieure 31, elle est élastiquement contrainte ou déformée vers l'extérieur, de sorte que l'étanchéité est encore améliorée lorsqu'elle coopère avec cette partie inférieure 31 de plus grand diamètre.Advantageously, the sealed contact zone 41 is elastically deformable, and comprises at rest, that is to say in an unstressed position, which corresponds to the actuating position of the pump represented on the figure 2 , an inner diameter greater than the outer diameter of the upper portion 32 of smaller diameter of the actuating rod 30. This is visible on the figure 2 , and thus allows air to pass between the contact zone 41 and the actuating rod when the latter is in the non-sealed cooperation position, that is to say between the intermediate position and the actuating position of the pump. On the other hand, the inside diameter of the contact zone 41 is preferably smaller than the outside diameter of the lower portion 31 of larger diameter of the actuating rod 30. Thus, when said contact zone 41 cooperates with said lower portion 31 it is elastically constrained or deformed outwards, so that the seal is further improved when it cooperates with this lower portion 31 of larger diameter.

En variante, la tige d'actionnement 30 pourrait être de diamètre extérieur constant sur la course d'actionnement, mais comporter une ou plusieurs gorge(s), avantageusement axiale(s), à partir desquelle(s) la coopération entre la tige d'actionnement et la virole n'est plus étanche. D'autres variantes sont aussi envisageables, du moment qu'une position intermédiaire soit définie dans la course d'actionnement, avant laquelle la virole coopère de manière étanche avec la tige, et après laquelle il n'y a plus d'étanchéité.As a variant, the actuating rod 30 could be of constant outside diameter over the actuating stroke, but could comprise one or more grooves, advantageously axial, from which the cooperation between the rod of actuation and the ferrule is no longer waterproof. Other variants are also conceivable, as long as an intermediate position is defined in the actuating stroke, before which the ferrule cooperates sealingly with the rod, and after which there is no longer sealing.

La figure 3 représente une vue de détail de la pompe représentée sur les figures 1 et 2.The figure 3 represents a detailed view of the pump shown on the figures 1 and 2 .

La figure 4 montre une autre variante de réalisation, dans laquelle il n'y a pas de joint 50 prévu entre la virole et la bague de fixation 5. Dans cette variante, c'est la bride radiale 45 de la virole 40, qui comporte sur sa surface axiale supérieure un profil d'étanchéité qui coopère de manière étanche avec la bague de fixation 5. Ce profil d'étanchéité peut comporter un ou plusieurs bourrelets comme représenté sur la figure, et pourrait prendre toute forme appropriée pour réaliser une étanchéité.The figure 4 shows another variant embodiment, in which there is no seal 50 provided between the ferrule and the fixing ring 5. In this variant, it is the radial flange 45 of the ferrule 40, which has on its surface upper axial sealing profile which cooperates sealingly with the fixing ring 5. This sealing profile may comprise one or more beads as shown in the figure, and could take any form suitable for sealing.

La figure 5 montre une autre variante de réalisation dans laquelle c'est le bord radialement externe de la bride radiale 45 de la virole 40 qui comporte au moins une lèvre d'étanchéité 49 adaptée à coopérer de manière étanche avec la bague de fixation 5. Ici aussi, d'autres profils d'étanchéité, pourraient être prévus à ce niveau.The figure 5 shows another variant embodiment in which it is the radially outer edge of the radial flange 45 of the ferrule 40 which comprises at least one sealing lip 49 adapted to cooperate in a manner The sealing ring with the fixing ring 5. Here again, other sealing profiles could be provided at this level.

In sera avantageux de réaliser la virole dans un matériau relativement souple permettant de réaliser des bonnes étanchéités, par exemple un matériau comprenant du polyéthylène basse densité PEBD. L'utilisation de ce matériau sera notamment avantageuse pour permettre la création de l'étanchéité au niveau de la zone de contact 41 lorsque celle-ci coopère de manière étanche avec la tige d'actionnement, et notamment pour permettre sa déformation dans le mode de réalisation où elle serait de dimensions inférieures à la partie inférieure de plus grand diamètre 31 de la tige d'actionnement 30. Le PEBD favorise aussi l'étanchéité avec la bague de fixation dans les variantes des figures 4 et 5.It will be advantageous to make the ferrule in a relatively flexible material which makes it possible to produce good seals, for example a material comprising LDPE low density polyethylene. The use of this material will be particularly advantageous to allow the creation of the seal at the contact zone 41 when it cooperates sealingly with the actuating rod, and in particular to allow its deformation in the mode of where it would be of smaller dimensions than the lower part of larger diameter 31 of the actuating rod 30. The LDPE also promotes sealing with the fixing ring in the variants of the Figures 4 and 5 .

Les modes de réalisation sans joint 50 sont également avantageux en ce qu'ils permettent une amélioration de la précision de position de la bague de fixation par rapport à la pompe, du fait de la moindre compressibilité axiale liée à l'absence du joint.The seamless embodiments 50 are also advantageous in that they allow an improvement in the positional accuracy of the fixing ring relative to the pump, due to the lower axial compressibility related to the absence of the seal.

Bien que la présente invention ait été décrite en référence à plusieurs variantes de réalisation de celle-ci, il est entendu qu'un homme du métier peut y apporter toutes modifications utiles sans sortir du cadre de la présente invention tel que défini par les revendications annexées.Although the present invention has been described with reference to several embodiments thereof, it is understood that a person skilled in the art can make any useful modifications without departing from the scope of the present invention as defined by the appended claims .

Claims (12)

  1. A fluid dispenser pump (10) comprising a pump body (11), a piston (20) that slides in leaktight manner in said pump body (11) between a rest position and an actuated position, said piston (20) being secured to an actuator rod (30) that extends axially out from said pump body (11), a ferrule (40) being mounted on the top edge (12) of said pump body (11), said ferrule (40) defining the rest position of said piston (20), the pump being characterized in that said ferrule (40) co-operates in leaktight manner with the actuator rod (30) while the actuator rod (30) is moving between the rest position and an intermediate position, and said ferrule (40) co-operating in non-leaktight manner with the actuator rod (30) while the actuator rod (30) is moving between said intermediate position and the actuated position, so as to enable the pump (10) to be vented, said piston (20) not being in contact with said ferrule (40), when in the rest position.
  2. A pump according to claim 1, in which said actuator rod (30) comprises a bottom portion (31) of greater diameter and a top portion (32) of smaller diameter, said bottom and top portions (31, 32) being interconnected via a junction portion (33), said ferrule (40) co-operating in leaktight manner with said bottom portion (31) of greater diameter while said actuator rod (30) is moving between the rest position and the intermediate position, and said ferrule (40) co-operating in non-leaktight manner with said top portion (32) of smaller diameter while the actuator rod (30) is moving between the intermediate position and the actuated position, said non-leaktight co-operation between the ferrule (40) and the actuator rod (30) making it possible to vent the pump (10).
  3. A pump according to claim 2, in which said ferrule (40), between the rest position and the intermediate position, co-operates in leaktight manner with the actuator rod (30) via a contact zone (41) that is elastically deformable, and that, at rest, has an inside diameter that is greater than the outside diameter of said top portion (32) of smaller diameter of the actuator rod (30), and has an inside diameter that is less than the outside diameter of said bottom portion (31) of greater diameter of the actuator rod (30), such that said contact zone (41) is elastically deformed outwards when it co-operates in leaktight manner with said bottom portion (31) of greater diameter.
  4. A pump according to claim 3, in which said junction zone (33) is frustoconical so as to make it easier for said contact zone (41) of the ferrule (40) to pass onto said bottom portion (31) of greater diameter.
  5. A pump according to any preceding claim, in which said ferrule (40) includes a shoulder (43), preferably of frustoconical shape, that is adapted to form an abutment with a junction portion (33), preferably of frustoconical shape, of the actuator rod (30), so as to define the rest position of the piston (20).
  6. A pump according to any preceding claim, in which said ferrule (40) comprises a radial flange (45) that bears against the top end edge (12) of the pump body 11, and an axial sleeve (44) that extends inside said pump body (11), at least in part, and having a bottom end (41) that forms a contact zone that co-operates with said actuator rod (30).
  7. A pump according to claim 6, in which said radial flange (45) supports a gasket (50) that co-operates in leaktight manner with said ferrule (40) and with a fastener ring (5) that is adapted to fasten the pump (10) on a reservoir (1) containing the fluid to be dispensed.
  8. A pump according to claim 6, in which said radial flange (45) co-operates in leaktight manner with a fastener ring (5) that is adapted to fasten the pump (10) on a reservoir (1) containing the fluid to be dispensed.
  9. A pump according to claim 8, in which said radial flange (45) includes a sealing profile (48) on its top axial surface that co-operates in leaktight manner with the fastener ring (5).
  10. A pump according to claim 8 or claim 9, in which, on its radially outermost edge, said radial flange (45) includes at least one sealing lip (49) that co-operates in leaktight manner with the fastener ring (5).
  11. A pump according to any preceding claim, in which said ferrule (40) is made out of a material that is relatively flexible, such as a material comprising low-density polyethylene (LDPE).
  12. A fluid dispenser device comprising a reservoir (1) containing fluid and a pump (10) according to any preceding claim, said pump (10) being assembled on said reservoir (1) by means of a fastener ring (5).
EP08775703A 2007-03-12 2008-03-10 Pump for distributing liquid product and dispenser comprising such a pump Active EP2139605B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0753766A FR2913731B1 (en) 2007-03-12 2007-03-12 FLUID PRODUCT DELIVERY PUMP AND DISPENSER HAVING SUCH A PUMP
PCT/FR2008/050401 WO2008129187A1 (en) 2007-03-12 2008-03-10 Pump for dispensing liquid product and dispenser comprising such pump

Publications (2)

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EP2139605A1 EP2139605A1 (en) 2010-01-06
EP2139605B1 true EP2139605B1 (en) 2010-07-28

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EP08775703A Active EP2139605B1 (en) 2007-03-12 2008-03-10 Pump for distributing liquid product and dispenser comprising such a pump

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US (1) US8292130B2 (en)
EP (1) EP2139605B1 (en)
JP (1) JP5216786B2 (en)
CN (1) CN101631624B (en)
DE (1) DE602008001978D1 (en)
FR (1) FR2913731B1 (en)
WO (1) WO2008129187A1 (en)

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NL2016644B1 (en) 2016-04-20 2017-11-07 Gab Eng & Development B V Storage holder for a dispenser
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FR3096089B1 (en) * 2019-05-14 2022-08-05 Aptar France Sas Method of assembling a high pressure pre-compression pump

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Also Published As

Publication number Publication date
FR2913731B1 (en) 2013-08-09
JP5216786B2 (en) 2013-06-19
CN101631624A (en) 2010-01-20
EP2139605A1 (en) 2010-01-06
US20100038383A1 (en) 2010-02-18
DE602008001978D1 (en) 2010-09-09
US8292130B2 (en) 2012-10-23
CN101631624B (en) 2013-03-27
WO2008129187A1 (en) 2008-10-30
FR2913731A1 (en) 2008-09-19
JP2010521283A (en) 2010-06-24

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