EP1328351B1 - Fluid product dispensing pump - Google Patents

Fluid product dispensing pump Download PDF

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Publication number
EP1328351B1
EP1328351B1 EP01980614A EP01980614A EP1328351B1 EP 1328351 B1 EP1328351 B1 EP 1328351B1 EP 01980614 A EP01980614 A EP 01980614A EP 01980614 A EP01980614 A EP 01980614A EP 1328351 B1 EP1328351 B1 EP 1328351B1
Authority
EP
European Patent Office
Prior art keywords
pump
lower piston
pump chamber
piston
outlet valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP01980614A
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German (de)
French (fr)
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EP1328351A1 (en
Inventor
Ludovic Petit
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.)
Aptar France SAS
Original Assignee
Valois SAS
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Publication date
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Publication of EP1328351A1 publication Critical patent/EP1328351A1/en
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    • 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
    • B05B11/1019—Piston pumps the outlet valve having a valve seat located downstream a movable valve element controlled by a pressure actuated controlling element the inlet valve moving concurrently with the controlling element during whole pressure and aspiration strokes, e.g. a cage for an inlet valve ball being part of the controlling element
    • 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
    • B05B11/1038—Pressure accumulation pumps, i.e. pumps comprising a pressure accumulation chamber
    • B05B11/104—Pressure accumulation pumps, i.e. pumps comprising a pressure accumulation chamber the outlet valve being opened by pressure after a defined accumulation stroke
    • 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
    • B05B11/1063—Air exhausted from the pump chamber being discharged into the container during priming

Definitions

  • the present invention relates to a fluid dispenser pump.
  • Fluid dispensing pumps are well known in the state of the art, and generally comprise a pump body which defines a pump chamber disposed between an inlet valve and an outlet valve, a piston sliding in said body pump for expelling the product contained in said pump chamber.
  • the pump may have two pistons, a high piston and a low piston, which slide together in the pump body during actuation, until the opening of the outlet valve and the expulsion of the product contained in the pump chamber.
  • the accuracy of the assay, as well as the assurance of the distribution of a full dose at each actuation may be essential criteria.
  • the object of the present invention is to provide a fluid dispensing pump which guarantees the accuracy of the dosage at each actuation of the pump and which ensures the distribution of a complete dose.
  • the present invention also aims to provide such a fluid dispenser pump that is simple and inexpensive to manufacture and assemble.
  • the present invention therefore relates to a fluid dispenser pump comprising a pump body comprising a pump chamber delimited between a high piston and a low piston, said pistons sliding in a sealed manner in said pump body, said pump chamber comprising an inlet valve and an outlet valve, said lower piston cooperating, when the dose is complete, with said outlet valve for opening and allowing the expulsion of the product contained in the pump chamber, characterized in that the lower piston is separated from the inlet valve seat and is mounted floating in the pump chamber, said lower piston being returned to its position. rest position by said inlet valve seat.
  • the outlet valve comprises a valve member movable in the pump chamber and which is biased towards its closed position by the pressure of the product contained in the pump chamber, said movable valve member having a cooperating shoulder, when the dose is complete, with said low piston or an integral member thereof, such that the lower piston withdraws the valve member from its valve seat to open the outlet valve.
  • the outer diameter of the high piston is greater than the outside diameter of the low piston.
  • valve seat of the inlet valve is biased by an elastic element such as a spring towards the rest position of the pump, in which said low piston or an element integral with it urges the outlet valve towards its closing position.
  • said low piston acts as a priming element to evacuate the air contained in the pump chamber during the first actuation of the pump.
  • an air exhaust passage is formed between the low piston, the high piston and the inlet valve seat to allow the evacuation of air out of the air.
  • said low piston sealingly sealing said air passage when the pump chamber contains fluid to be dispensed.
  • the outlet valve member comprises a second shoulder which cooperates with said low piston or an element integral with said low piston in the rest position of the pump so that the lower piston urges said movable valve member towards its position. closure.
  • the pump comprises a pump body 10 in which a high piston 20 and a low piston 30 are sealed. Between said pistons 20 and 30 is defined a pump chamber 11 which comprises an inlet valve 40 and an outlet valve 50.
  • the inlet valve 40 may be a ball valve having a ball 41 cooperating with a corresponding valve seat 42.
  • the low piston 30, or an element 70 integral with it cooperates, when the dose is complete, with the outlet valve 50 to open it.
  • the dose can be complete at the end of the actuating stroke of the lower piston 30, but it is also possible to have a complete dose before the end of the race.
  • the outlet valve 50 opens before the bottom piston has completed its full course.
  • the outlet valve 50 comprises a movable outlet valve member 51 which can move axially in the pump chamber 11, said movable valve member 51 being biased towards its position of closing, in which it bears against its valve seat 52, by the pressure of the product disposed inside the pump chamber 11.
  • Said valve member 51 advantageously comprises a first shoulder 55 which cooperates with the low piston 30 or an element 70 integral with said low piston 30, when the dose is complete, so that the low piston 30 mechanically removes the valve member 51 from its valve seat 52 for open the outlet valve 50.
  • the movable valve member 51 of the outlet valve 50 also comprises a second shoulder 56 which cooperates with the lower piston 30 or a member thereof 70 in the pump rest position such that the movable valve member 51 is biased towards its closed position.
  • the pump is in the rest position.
  • the user When the user actuates the pump, it exerts an axial pressure on the upper piston 20 which will slide inside the pump body 10.
  • the fluid product contained in the pump chamber 11 being incompressible, it also causes the low piston 30 to slide sealingly inside the pump body 10.
  • the inlet valve 40 is biased towards its closed position by the pressure of the product inside the pump chamber, and it is likewise for the outlet valve 50, whose movable valve member 51 is also biased towards its closed position by the pressure of the product inside the pump chamber 11.
  • the gap between the shoulders 55 and 56 determines the time of opening of the outlet valve, and therefore the volume of the dose to be dispensed. It is enough to modify only this difference to vary the volume of the dose.
  • the present invention therefore makes it possible to vary very simply and very inexpensively the volume of dose to be dispensed, by modifying only one part of the pump.
  • the inlet valve 40 of the pump chamber 11 comprises a valve seat 42 mounted floating inside the body of the pump 10 and biased by a spring towards its rest position shown on the figure 1 .
  • This spring 60 is the return spring of the pump.
  • the low piston 30 has a shoulder which cooperates with said seat of the inlet valve 42 so that when the outlet valve is open, the product contained in the pump chamber 11 is expelled by means of said bottom piston 30, which is returned to its starting position by the spring 60 acting on the valve seat 42.
  • the low piston 30 is made separately from the inlet valve seat 42.
  • the advantage of producing the lower piston 30 separately will be described hereinafter with reference to FIG. figure 2 in relation to a particular embodiment of the invention.
  • the invention thus provides the two essential advantages of guaranteeing on one hand the expulsion of the entire dose at each actuation, by preventing any partial distribution of the contents of the pump chamber. 11. Indeed, the outlet valve 50 can not open before the dose is complete, regardless of the actuating force exerted by the user on the pump. On the other hand, the precision of the dosage is guaranteed by the automatic closing of the outlet valve after the expulsion of the dose.
  • the low piston 30 is made separately from the inlet valve seat 42.
  • the fact of making the lower piston 30 separately from the inlet valve seat 42, and to mount said floating bottom piston 30 to the inside of the pump body makes it possible to use said bottom piston as a priming element. Indeed, as visible on the figure 2 at the first actuation of the pump, when the pump chamber 11 contains air, the low piston 30 is detached from the inlet valve seat 42, since the air is compressible, and a passage is created. discharge air between the low piston 30 and said inlet valve seat 42 which allows the evacuation of the air contained in the pump chamber 11.
  • This air passage is also provided between the low piston 30 and the high piston 20, by one or more grooves 29 provided in a front surface of the upper piston 20, and which cooperates with the lower piston 30 at the end of stroke of the first actuation of the pump, as shown in FIG. figure 2 .
  • This groove 29 thus cooperates with the low piston 30 in a position which limits the dead volume of the pump chamber 11 to a maximum so that almost all the air contained in said pump chamber is evacuated into the position represented on the figure 2 .
  • said low piston 30 is automatically biased by the product towards its position shown on the figures 1 and 3 wherein the low piston 30 cooperates with the valve seat 42 to seal said aforementioned air passage. From this moment on, said lower piston 30 can no longer disengage itself from the valve seat 42 due to the presence of incompressible fluid inside the pump chamber 11. subsequent actuations of the pump, the low piston 30 and the valve seat 42 then act as a single piece, ensuring a perfect seal, avoiding product leakage through said exhaust air passage for priming pump.
  • the embodiment shown in the figures is a particular advantageous embodiment, but it is quite possible to provide other priming means for priming the pump, without necessarily using the piston low for this purpose.

Description

La présente invention concerne une pompe de distribution de produit fluide.The present invention relates to a fluid dispenser pump.

Les pompes de distribution de produit fluide sont bien connues dans l'état de la technique, et comprennent généralement un corps de pompe qui définit une chambre de pompe disposée entre un clapet d'entrée et un clapet de sortie, un piston coulissant dans ledit corps de pompe pour expulser le produit contenu dans ladite chambre de pompe. Dans certains cas la pompe peut comporter deux pistons, un piston haut et un piston bas, qui coulissent ensemble dans le corps de pompe lors de l'actionnement, jusqu'à l'ouverture du clapet de sortie et l'expulsion du produit contenu dans la chambre de pompe.Fluid dispensing pumps are well known in the state of the art, and generally comprise a pump body which defines a pump chamber disposed between an inlet valve and an outlet valve, a piston sliding in said body pump for expelling the product contained in said pump chamber. In some cases the pump may have two pistons, a high piston and a low piston, which slide together in the pump body during actuation, until the opening of the outlet valve and the expulsion of the product contained in the pump chamber.

Telles pompes sont décrit dans les documents FR 1486392 et US 5303854 .Such pumps are described in the documents FR 1486392 and US 5303854 .

Dans certains cas, en particulier avec des produits pharmaceutiques, la précision du dosage, ainsi que l'assurance de la distribution d'une dose complète à chaque actionnement peuvent être des critères essentiels. II est en particulier important d'empêcher une distribution d'une dose partielle, et d'éviter un remplissage partiel de la chambre de pompe après actionnement de celle-ci.In some cases, particularly with pharmaceuticals, the accuracy of the assay, as well as the assurance of the distribution of a full dose at each actuation, may be essential criteria. In particular, it is important to prevent dispensing of a partial dose, and to avoid partial filling of the pump chamber after actuation thereof.

La présente invention a pour but de fournir une pompe de distribution de produit fluide qui garantit la précision du dosage à chaque actionnement de la pompe et, qui assure la distribution d'une dose complète.The object of the present invention is to provide a fluid dispensing pump which guarantees the accuracy of the dosage at each actuation of the pump and which ensures the distribution of a complete dose.

La présente invention a également pour but de fournir une telle pompe de distribution de produit fluide qui soit simple et peu coûteuse à fabriquer et à assembler.The present invention also aims to provide such 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 comportant un corps de pompe comprenant une chambre de pompe délimitée entre un piston haut et un piston bas, lesdits pistons coulissant de manière étanche dans ledit corps de pompe, ladite chambre de pompe comportant un clapet d'entrée et un clapet de sortie, ledit piston bas coopérant, lorsque la dose est complète, avec ledit clapet de sortie pour l'ouvrir et permettre l'expulsion du produit contenu dans la chambre de pompe, caractérisé en ce que le piston bas est séparé du siège de clapet d'entrée et est monté flottant dans la chambre de pompe, ledit piston bas étant ramené vers sa position de repos par ledit siège de clapet d'entrée.The present invention therefore relates to a fluid dispenser pump comprising a pump body comprising a pump chamber delimited between a high piston and a low piston, said pistons sliding in a sealed manner in said pump body, said pump chamber comprising an inlet valve and an outlet valve, said lower piston cooperating, when the dose is complete, with said outlet valve for opening and allowing the expulsion of the product contained in the pump chamber, characterized in that the lower piston is separated from the inlet valve seat and is mounted floating in the pump chamber, said lower piston being returned to its position. rest position by said inlet valve seat.

Avantageusement, le clapet de sortie comporte un organe de clapet mobile dans la chambre de pompe et qui est sollicitée vers sa position de fermeture par la pression du produit contenu dans la chambre de pompe, ledit organe de clapet mobile comportant un épaulement coopérant, lorsque la dose est complète, avec ledit piston bas ou un élément solidaire de celui-ci, de telle sorte que le piston bas retire l'organe de clapet de son siège de clapet pour ouvrir le clapet de sortie.Advantageously, the outlet valve comprises a valve member movable in the pump chamber and which is biased towards its closed position by the pressure of the product contained in the pump chamber, said movable valve member having a cooperating shoulder, when the dose is complete, with said low piston or an integral member thereof, such that the lower piston withdraws the valve member from its valve seat to open the outlet valve.

Avantageusement, le diamètre extérieur du piston haut est supérieur au diamètre extérieur du piston bas.Advantageously, the outer diameter of the high piston is greater than the outside diameter of the low piston.

Avantageusement, le siège de clapet du clapet d'entrée est sollicité par un élément élastique tel qu'un ressort vers la position de repos de la pompe, dans laquelle ledit piston bas ou un élément solidaire de celui-ci sollicite le clapet de sortie vers sa position de fermeture.Advantageously, the valve seat of the inlet valve is biased by an elastic element such as a spring towards the rest position of the pump, in which said low piston or an element integral with it urges the outlet valve towards its closing position.

Avantageusement, ledit piston bas agit en tant qu'élément d'amorçage pour évacuer l'air contenu dans la chambre de pompe lors du premier actionnement de la pompe.Advantageously, said low piston acts as a priming element to evacuate the air contained in the pump chamber during the first actuation of the pump.

Avantageusement, lorsque la chambre de pompe contient de l'air, un passage d'évacuation d'air est formé entre le piston bas, le piston haut et le siège de clapet d'entrée pour permettre l'évacuation de l'air hors de la chambre de pompe, ledit piston bas obturant de manière étanche ledit passage d'air lorsque la chambre de pompe contient du produit fluide à distribuer.Advantageously, when the pump chamber contains air, an air exhaust passage is formed between the low piston, the high piston and the inlet valve seat to allow the evacuation of air out of the air. the pump chamber, said low piston sealingly sealing said air passage when the pump chamber contains fluid to be dispensed.

Avantageusement, l'organe de clapet de sortie comporte un second épaulement qui coopère avec ledit piston bas ou un élément solidaire dudit piston bas dans la position de repos de la pompe de telle sorte que le piston bas sollicite ledit organe de clapet mobile vers sa position de fermeture.Advantageously, the outlet valve member comprises a second shoulder which cooperates with said low piston or an element integral with said low piston in the rest position of the pump so that the lower piston urges said movable valve member towards its position. closure.

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

  • la figure 1 est une vue schématique en section transversale d'une pompe selon un mode de réalisation avantageux de la présente invention, en.position de repos,
  • la figure 2 est une figure similaire à celle de la figure 1, en position d'amorçage,
  • la figure 3 est une vue similaire à celle des figures 1 et 2, juste avant l'expulsion du produit contenu dans la chambre de pompe.
Other features and advantages of the present invention will become more apparent in the following detailed description, with reference to the accompanying drawings, given by way of non-limiting examples, in which:
  • the figure 1 is a schematic cross-sectional view of a pump according to an advantageous embodiment of the present invention, in resting position,
  • the figure 2 is a figure similar to that of the figure 1 , in priming position,
  • the figure 3 is a view similar to that of figures 1 and 2 just before the expulsion of the product contained in the pump chamber.

En référence aux figures, la pompe comporte un corps de pompe 10 dans lequel coulisse de manière étanche un piston haut 20 et un piston bas 30. Entre lesdits pistons 20 et 30 est définie une chambre de pompe 11 qui comporte un clapet d'entrée 40 et un clapet de sortie 50. Le clapet d'entrée 40 peut être un clapet à bille comportant une bille 41 coopérant avec un siège de clapet 42 correspondant. Lorsque l'utilisateur actionne la pompe, les deux pistons 20 et 30 coulissent dans le corps de pompe en fermant le clapet d'entrée 40 jusqu'à ce que le clapet de sortie 50 s'ouvre pour permettre l'expulsion du produit.With reference to the figures, the pump comprises a pump body 10 in which a high piston 20 and a low piston 30 are sealed. Between said pistons 20 and 30 is defined a pump chamber 11 which comprises an inlet valve 40 and an outlet valve 50. The inlet valve 40 may be a ball valve having a ball 41 cooperating with a corresponding valve seat 42. When the user actuates the pump, the two pistons 20 and 30 slide in the pump body by closing the inlet valve 40 until the outlet valve 50 opens to allow the expulsion of the product.

Selon l'invention, le piston bas 30, ou un élément 70 solidaire de celui-ci, coopère, lorsque les dose est complète, avec le clapet de sortie 50 pour l'ouvrir. La dose peut être complète en fin de course d'actionnement du piston bas 30, mais il est aussi possible d'avoir une dose complète avant la fin de course. Dans ce cas, le clapet de sortie 50 s'ouvre avant que le piston bas ait effectué sa course complète. En particulier, dans l'exemple représenté sur les figures, le clapet de sortie 50 comporte un organe de clapet de sortie mobile 51 qui peut se déplacer axialement dans la chambre de pompe 11, ledit organe de clapet mobile 51 étant sollicité vers sa position de fermeture, dans lequel il s'appuie contre son siège de clapet 52, par la pression du produit disposé à l'intérieur de la chambre de pompe 11. Cette mise en oeuvre assure une étanchéité parfaite au niveau du clapet de sortie, puisqu'il est impossible que celui-ci s'ouvre de manière non souhaitée avant l'expulsion du produit. Ledit organe de clapet 51 comporte avantageusement un premier épaulement 55 qui coopère avec le piston bas 30 ou un élément 70 solidaire dudit piston bas 30, lorsque la dose est complète, de telle sorte que le piston bas 30 retire mécaniquement l'organe de clapet 51 de son siège de clapet 52 pour ouvrir le clapet de sortie 50. Avantageusement, l'organe de clapet mobile 51 du clapet de sortie 50 comporte également un second épaulement 56 qui coopère avec le piston bas 30 ou un élément solidaire de celui-ci 70 en position de repos de la pompe de telle sorte que l'organe de clapet mobile 51 est sollicité vers sa position de fermeture.According to the invention, the low piston 30, or an element 70 integral with it, cooperates, when the dose is complete, with the outlet valve 50 to open it. The dose can be complete at the end of the actuating stroke of the lower piston 30, but it is also possible to have a complete dose before the end of the race. In this case, the outlet valve 50 opens before the bottom piston has completed its full course. In particular, in the example shown in the figures, the outlet valve 50 comprises a movable outlet valve member 51 which can move axially in the pump chamber 11, said movable valve member 51 being biased towards its position of closing, in which it bears against its valve seat 52, by the pressure of the product disposed inside the pump chamber 11. This implementation ensures a perfect seal at the outlet valve, since it is impossible for it to open in an undesired manner before the product is expelled. Said valve member 51 advantageously comprises a first shoulder 55 which cooperates with the low piston 30 or an element 70 integral with said low piston 30, when the dose is complete, so that the low piston 30 mechanically removes the valve member 51 from its valve seat 52 for open the outlet valve 50. Advantageously, the movable valve member 51 of the outlet valve 50 also comprises a second shoulder 56 which cooperates with the lower piston 30 or a member thereof 70 in the pump rest position such that the movable valve member 51 is biased towards its closed position.

Le fonctionnement de la pompe va maintenant être décrit ci-après en référence aux figures 1 et 3.The operation of the pump will now be described below with reference to figures 1 and 3 .

Sur la figure 1, la pompe est en position de repos. Lorsque l'utilisateur actionne la pompe, il exerce une pression axiale sur le piston haut 20 qui va coulisser à l'intérieur du corps de pompe 10. Le produit fluide contenu dans la chambre de pompe 11 étant incompressible, celui-ci entraîne également le piston bas 30 à coulisser de manière étanche à l'intérieur du corps de pompe 10. Le clapet d'entrée 40 est sollicité vers sa position de fermeture par la pression du produit à l'intérieur de la chambre de pompe, et il en est de même pour le clapet de sortie 50, dont l'organe de clapet mobile 51 est également sollicité vers sa position de fermeture par la pression du produit à l'intérieur de la chambre de pompe 11.On the figure 1 , the pump is in the rest position. When the user actuates the pump, it exerts an axial pressure on the upper piston 20 which will slide inside the pump body 10. The fluid product contained in the pump chamber 11 being incompressible, it also causes the low piston 30 to slide sealingly inside the pump body 10. The inlet valve 40 is biased towards its closed position by the pressure of the product inside the pump chamber, and it is likewise for the outlet valve 50, whose movable valve member 51 is also biased towards its closed position by the pressure of the product inside the pump chamber 11.

Lorsque la dose est complète, on arrive à la position représentée sur la figure 3. Le diamètre du piston bas 30 étant inférieur au diamètre du piston haut 20, le piston bas 30, respectivement l'élément solidaire du piston bas 30 et qui est référencé 70 sur les figures, se déplace plus vite que le piston haut 20 pendant l'actionnement de la pompe. Il passe ainsi de sa position dans laquelle il est en contact avec le second épaulement 56, représenté sur la figure 1, vers sa position dans laquelle il arrive en contact avec le premier épaulement 55 de l'organe de clapet mobile 51. A ce moment là, le piston bas coopère avec l'organe de clapet mobile 51 pour le déplacer axialement à l'intérieur de la chambre de pompe, en le retirant de son siège de clapet 52, afin d'ouvrir le clapet de sortie 50 et permettre ainsi l'expulsion du produit contenu dans la chambre de pompe 11. L'écart entre les épaulements 55 et 56 détermine le moment d'ouverture du clapet de sortie, et donc le volume de la dose à distribuer. Il suffit de modifier seulement cet écart pour faire varier le volume de la dose. La présente invention permet donc de faire varier très simplement et de manière très peu coûteuse le volume de dose à distribuer, en ne modifiant qu'une seule pièce de la pompe.When the dose is complete, we arrive at the position represented on the figure 3 . Since the diameter of the bottom piston 30 is smaller than the diameter of the top piston 20, the bottom piston 30, respectively the element integral with the bottom piston 30 and which is referenced 70 in the figures, moves faster than the top piston 20 during the actuation of the pump. It thus passes from its position in which it is in contact with the second shoulder 56, represented on the figure 1 to its position in which it comes into contact with the first shoulder 55 of the movable valve member 51. At this time, the low piston cooperates with the movable valve member 51 to move axially within the movable valve member 51. the pump chamber, by removing it from its valve seat 52, to open the outlet valve 50 and thus allow the expulsion of the product contained in the pump chamber 11. The gap between the shoulders 55 and 56 determines the time of opening of the outlet valve, and therefore the volume of the dose to be dispensed. It is enough to modify only this difference to vary the volume of the dose. The present invention therefore makes it possible to vary very simply and very inexpensively the volume of dose to be dispensed, by modifying only one part of the pump.

Comme représenté sur les figures, le clapet d'entrée 40 de la chambre de pompe 11 comporte un siège de clapet 42 monté flottant à l'intérieur du corps du pompe 10 et sollicité par un ressort vers sa position de repos représentée sur la figure 1. Ce ressort 60 est le ressort de rappel de la pompe. Avantageusement, le piston bas 30 comporte un épaulement qui coopère avec ledit siège du clapet d'entrée 42 de sorte que lorsque le clapet de sortie est ouvert, le produit contenu dans la chambre de pompe 11 est expulsé au moyen dudit piston bas 30, qui est ramené vers sa position de départ par le ressort 60 qui agit sur le siège de clapet 42.As shown in the figures, the inlet valve 40 of the pump chamber 11 comprises a valve seat 42 mounted floating inside the body of the pump 10 and biased by a spring towards its rest position shown on the figure 1 . This spring 60 is the return spring of the pump. Advantageously, the low piston 30 has a shoulder which cooperates with said seat of the inlet valve 42 so that when the outlet valve is open, the product contained in the pump chamber 11 is expelled by means of said bottom piston 30, which is returned to its starting position by the spring 60 acting on the valve seat 42.

Selon l'invention, le piston bas 30 est réalisé séparément du siège de clapet d'entrée 42. L'avantage de réaliser le piston bas 30 de manière séparée sera décrit ci-après en référence à la figure 2 en relation avec un mode de réalisation particulier de l'invention.According to the invention, the low piston 30 is made separately from the inlet valve seat 42. The advantage of producing the lower piston 30 separately will be described hereinafter with reference to FIG. figure 2 in relation to a particular embodiment of the invention.

Lorsque le clapet de sortie 50 est ouvert, le produit contenu dans la chambre de pompe 11 est donc expulsé hors de ladite chambre de pompe, le piston bas remontant à l'intérieur du corps de pompe 10 sous l'effet du ressort comprimé 60 jusqu'à ce que le piston bas 30, respectivement la pièce 70 solidaire dudit piston bas 30, vienne à nouveau buter contre le second épaulement 56 de l'organe de clapet mobile 51 du clapet de sortie 50 pour solliciter celui-ci à nouveau vers sa position de fermeture. La dépression créée dans la chambre de pompe par l'expulsion du produit et la remontée des pistons ouvre le clapet d'entrée 40, ladite bille étant donc soulevée de son siège de clapet pour permettre l'aspiration d'une nouvelle dose de produit à l'intérieur de la chambre de pompe 11.When the outlet valve 50 is open, the product contained in the pump chamber 11 is thus expelled from said pump chamber, the low piston going up inside the pump body 10 under the effect of the compressed spring 60 until that the bottom piston 30, respectively the part 70 integral with said bottom piston 30, comes up again against the second shoulder 56 of the movable valve member 51 of the outlet valve 50 to urge it back to its closing position. The depression created in the pump chamber by the expulsion of the product and the rise of the pistons opens the inlet valve 40, said ball thus being lifted from its valve seat to allow the suction of a new dose of product to inside the pump chamber 11.

L'invention fournit donc les deux avantages essentiels de garantir d'une part l'expulsion de la totalité de la dose à chaque actionnement, en empêchant toute distribution partielle du contenu de la chambre de pompe 11. En effet, le clapet de sortie 50 ne peut pas s'ouvrir avant que la dose ne soit complète, quelle que soit la force d'actionnement exercée par l'utilisateur sur la pompe. D'autre part, la précision du dosage est garantie par la fermeture automatique du clapet de sortie après l'expulsion de la dose.The invention thus provides the two essential advantages of guaranteeing on one hand the expulsion of the entire dose at each actuation, by preventing any partial distribution of the contents of the pump chamber. 11. Indeed, the outlet valve 50 can not open before the dose is complete, regardless of the actuating force exerted by the user on the pump. On the other hand, the precision of the dosage is guaranteed by the automatic closing of the outlet valve after the expulsion of the dose.

Selon l'invention, le piston bas 30 est réalisé séparément du siège de clapet d'entrée 42. Le fait de réaliser le piston bas 30 de manière séparée du siège de clapet d'entrée 42, et de monter ledit piston bas 30 flottant à l'intérieur du corps de pompe permet d'utiliser ledit piston bas en tant qu'élément d'amorçage. En effet, comme visible sur la figure 2, au premier actionnement de la pompe, lorsque la chambre de pompe 11 contient de l'air, le piston bas 30 se décolle du siège de clapet d'entrée 42, puisque l'air est compressible, et il se crée un passage d'air d'évacuation entre le piston bas 30 et ledit siège de clapet d'entrée 42 qui permet l'évacuation de l'air contenu dans la chambre de pompe 11. Ce passage d'air est également assuré entre le piston bas 30 et le piston haut 20, par une ou plusieurs rainures 29 prévues dans une surface frontale du piston haut 20, et qui coopère avec le piston bas 30 en fin de course du premier actionnement de la pompe, comme représenté sur la figure 2. Cette rainure 29 coopère donc avec le piston bas 30 dans une position qui permet de limiter au maximum le volume mort de la chambre de pompe 11 de sorte que la quasi-totalité de l'air contenu dans ladite chambre de pompe est évacué dans la position représentée sur la figure 2. Lorsque l'utilisateur relâche la pression sur la pompe à partir de la position représentée sur la figure 2, l'ensemble du mécanisme de la pompe remonte sous l'effet du ressort de rappel 60, de sorte que la chambre de pompe se remplie de produit à travers son clapet d'entrée 40. Dès que du produit entre dans la chambre de pompe 11, ledit piston bas 30 est automatiquement sollicité par le produit vers sa position représentée sur les figures 1 et 3, dans laquelle le piston bas 30 coopère avec le siège de clapet 42 pour fermer de manière étanche ledit passage d'air mentionné précédemment. A partir de ce moment là ledit piston bas 30 ne peut plus se décoller du siège de clapet 42 en raison de la présence de produit fluide incompressible à l'intérieur de la chambre de pompe 11. Lors des actionnements suivants de la pompe, le piston bas 30 et le siège de clapet 42 agissent alors comme une pièce monobloc, en assurant une étanchéité parfaite, évitant toute fuite de produit à travers ledit passage d'air d'évacuation servant à l'amorçage de la pompe. Bien entendu, le mode de réalisation représenté sur les figures est un mode de réalisation particulier avantageux, mais il est tout à fait envisageable de prévoir d'autres moyens d'amorçage pour amorcer la pompe, sans nécessairement utiliser le piston bas à cet effet.According to the invention, the low piston 30 is made separately from the inlet valve seat 42. The fact of making the lower piston 30 separately from the inlet valve seat 42, and to mount said floating bottom piston 30 to the inside of the pump body makes it possible to use said bottom piston as a priming element. Indeed, as visible on the figure 2 at the first actuation of the pump, when the pump chamber 11 contains air, the low piston 30 is detached from the inlet valve seat 42, since the air is compressible, and a passage is created. discharge air between the low piston 30 and said inlet valve seat 42 which allows the evacuation of the air contained in the pump chamber 11. This air passage is also provided between the low piston 30 and the high piston 20, by one or more grooves 29 provided in a front surface of the upper piston 20, and which cooperates with the lower piston 30 at the end of stroke of the first actuation of the pump, as shown in FIG. figure 2 . This groove 29 thus cooperates with the low piston 30 in a position which limits the dead volume of the pump chamber 11 to a maximum so that almost all the air contained in said pump chamber is evacuated into the position represented on the figure 2 . When the user releases pressure on the pump from the position shown on the figure 2 the entire mechanism of the pump rises under the effect of the return spring 60, so that the pump chamber is filled with product through its inlet valve 40. As soon as the product enters the pump chamber 11, said low piston 30 is automatically biased by the product towards its position shown on the figures 1 and 3 wherein the low piston 30 cooperates with the valve seat 42 to seal said aforementioned air passage. From this moment on, said lower piston 30 can no longer disengage itself from the valve seat 42 due to the presence of incompressible fluid inside the pump chamber 11. subsequent actuations of the pump, the low piston 30 and the valve seat 42 then act as a single piece, ensuring a perfect seal, avoiding product leakage through said exhaust air passage for priming pump. Of course, the embodiment shown in the figures is a particular advantageous embodiment, but it is quite possible to provide other priming means for priming the pump, without necessarily using the piston low for this purpose.

D'autres modifications peuvent être réalisées par l'homme du métier sans sortir du cadre de la présente invention telle que défini par les revendications annexées.Other modifications may be made by those skilled in the art without departing from the scope of the present invention as defined by the appended claims.

Claims (7)

  1. A fluid dispenser pump comprising a pump body (10) containing a pump chamber (11) defined between an upper piston (20) and a lower piston (30), said pistons (20, 30) being mounted to slide in leaktight manner in said pump body (10), said pump chamber (11) being provided with an inlet valve (40) and with an outlet valve (50), said lower piston (30) co-operating with said outlet valve (50), when the full dose has been metered out, to open said outlet valve and to make it possible to deliver the fluid contained in the pump chamber (11), said dispenser pump being characterized in that the lower piston (30) is made separate from the inlet valve seat (42) and is mounted to float in the pump chamber (11), said lower piston (30) being returned to its rest position by said inlet valve seat (42).
  2. A pump according to claim 1, in which the outlet valve (50) comprises a valve member (51) which is mounted to move in the pump chamber (11) and which is urged into its closure position by pressure from the fluid contained in the pump chamber (11), said moving valve member (51) being provided with a shoulder (55) which, when a full dose has been metered out, co-operates with said lower piston (30) or with an element (70) integral therewith, so that the lower piston (30) lifts the valve member (51) off its valve seat (52) so as to open the outlet valve (50).
  3. A pump according to claim 1 or claim 2, in which the outside diameter of the upper piston (20) is larger than the outside diameter of the lower piston (30).
  4. A pump according to any preceding claim, in which the valve seat (42) of the inlet valve (40) is urged by a resilient element (60) such as a spring into the rest position of the pump, in which position said lower piston (30) or an element (70) integral therewith urges the outlet valve (50) into its closure position.
  5. A pump according to any preceding claim, in which said lower piston (30) acts as a primer element for removing the air contained in the pump chamber (11) when the pump is actuated for the first time.
  6. A pump according to claim 5, in which, when the pump chamber (11) contains air, an air removal passageway is formed between the lower piston (30), the upper piston (20) and the inlet valve seat (42) so as to enable the air to be removed from the pump chamber (11), said lower piston (30) closing off said air passageway in leaktight manner when the pump chamber (11) contains fluid to be dispensed.
  7. A pump according to any preceding claim, in which the outlet valve member (51) is provided with a second shoulder (56) which co-operates with said lower piston (30) or with an element (70) integral with said lower piston (30), when the pump is in the rest position, so that the lower piston (30) urges said moving valve member (51) into its closure position.
EP01980614A 2000-10-23 2001-10-19 Fluid product dispensing pump Expired - Lifetime EP1328351B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0013569 2000-10-23
FR0013569A FR2815675B1 (en) 2000-10-23 2000-10-23 FLUID PRODUCT DELIVERY PUMP
PCT/FR2001/003257 WO2002034413A1 (en) 2000-10-23 2001-10-19 Fluid product dispensing pump

Publications (2)

Publication Number Publication Date
EP1328351A1 EP1328351A1 (en) 2003-07-23
EP1328351B1 true EP1328351B1 (en) 2008-02-20

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ID=8855642

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Application Number Title Priority Date Filing Date
EP01980614A Expired - Lifetime EP1328351B1 (en) 2000-10-23 2001-10-19 Fluid product dispensing pump

Country Status (8)

Country Link
US (1) US6811060B2 (en)
EP (1) EP1328351B1 (en)
JP (1) JP3878552B2 (en)
CN (1) CN1251806C (en)
AU (1) AU2002212417A1 (en)
DE (1) DE60132907T2 (en)
FR (1) FR2815675B1 (en)
WO (1) WO2002034413A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2832767B1 (en) * 2001-11-28 2005-10-07 Valois Sa FLUID PRODUCT DELIVERY PUMP AND FLUID PRODUCT DISPENSING DEVICE INCORPORATING SUCH PUMP
FR2848617B1 (en) * 2002-12-16 2006-03-17 Oreal PUMP AND CONTAINER THUS EQUIPPED
DE102005009295A1 (en) * 2004-07-13 2006-02-16 Ing. Erich Pfeiffer Gmbh Dosing device for media
WO2006032699A1 (en) * 2004-09-25 2006-03-30 Obrist Closures Switzerland Gmbh Dispensing pump
FR2878002B1 (en) * 2004-11-16 2011-01-21 Valois Sas FLUID PRODUCT DELIVERY PUMP AND DISPENSER HAVING SUCH A DELIVERY PUMP.
US7913714B2 (en) * 2007-08-30 2011-03-29 Perlick Corporation Check valve and shut-off reset device for liquid delivery systems
US8869824B2 (en) * 2007-08-30 2014-10-28 Perlick Corporation Check valve and shut-off reset device for liquid delivery systems

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1290043B (en) * 1966-03-12 1969-02-27 Albert Rudolf Nebulizer pump, especially for perfumes or other cosmetic liquids
FR2652389B1 (en) * 1989-09-26 1992-12-04 Debard Andre IMPROVEMENT IN PRE-PRESSURE PUMPS FOR THE DISTRIBUTION OF A LIQUID.
US5303854A (en) * 1993-03-08 1994-04-19 Spruhventile Gmbh Pharmaceutical pump dispenser having hydraulically closed outlet port
GB9519346D0 (en) * 1995-09-22 1995-11-22 English Glass Company The Limi Dispensing systems
US6698623B2 (en) * 2002-04-17 2004-03-02 Valois S.A. Fluid dispenser pump

Also Published As

Publication number Publication date
DE60132907D1 (en) 2008-04-03
AU2002212417A1 (en) 2002-05-06
FR2815675B1 (en) 2003-05-02
EP1328351A1 (en) 2003-07-23
US20040011823A1 (en) 2004-01-22
WO2002034413A1 (en) 2002-05-02
JP2004527363A (en) 2004-09-09
CN1251806C (en) 2006-04-19
US6811060B2 (en) 2004-11-02
DE60132907T2 (en) 2009-02-12
CN1494460A (en) 2004-05-05
JP3878552B2 (en) 2007-02-07
FR2815675A1 (en) 2002-04-26

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