EP1328351A1 - Fluid product dispensing pump - Google Patents

Fluid product dispensing pump

Info

Publication number
EP1328351A1
EP1328351A1 EP01980614A EP01980614A EP1328351A1 EP 1328351 A1 EP1328351 A1 EP 1328351A1 EP 01980614 A EP01980614 A EP 01980614A EP 01980614 A EP01980614 A EP 01980614A EP 1328351 A1 EP1328351 A1 EP 1328351A1
Authority
EP
European Patent Office
Prior art keywords
pump
piston
pump chamber
outlet valve
low
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01980614A
Other languages
German (de)
French (fr)
Other versions
EP1328351B1 (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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valois SAS filed Critical Valois SAS
Publication of EP1328351A1 publication Critical patent/EP1328351A1/en
Application granted granted Critical
Publication of EP1328351B1 publication Critical patent/EP1328351B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1001—Piston pumps
    • B05B11/1016—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 to expel the product contained in said pump chamber.
  • the pump can comprise 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 dosage, as well as the assurance of the distribution of a full dose at each actuation may be essential criteria. It is in particular important to prevent dispensing of a partial dose, and to avoid partial filling of the pump chamber after actuation thereof.
  • the object of the present invention is to provide a pump for dispensing a fluid product which guarantees the precision of the dosage on each actuation of the pump and which ensures the dispensing of a complete dose.
  • the present invention also aims to provide such a fluid dispensing pump which is simple and inexpensive to manufacture and assemble.
  • the present invention therefore relates to a fluid dispensing pump comprising a pump body comprising a pump chamber delimited between a high piston and a low piston, said pistons sliding in leaktight manner in said pump body, said pump chamber comprising an inlet valve and an outlet valve, said bottom piston cooperating, when the dose is complete, with said outlet valve for open it and allow the expulsion of the product contained in the pump chamber, characterized in that the low piston is separated from the inlet valve seat and is mounted floating in the pump chamber, said low piston being brought back towards its rest position by said inlet valve seat.
  • the outlet valve comprises a movable valve member in the pump chamber and which is urged towards its closed position by the pressure of the product contained in the pump chamber, said movable valve member comprising a cooperating shoulder, when the dose is complete, with said low piston or an element integral with the latter, so that the low piston withdraws the valve member from its valve seat to open the outlet valve.
  • the outside diameter of the top piston is greater than the outside diameter of the bottom piston.
  • valve seat of the inlet valve is urged 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 this urges the outlet valve towards its closed 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 evacuation passage is formed between the low piston, the high piston and the inlet valve seat to allow the evacuation of air from the pump chamber, said low piston sealingly closing said air passage when the pump chamber contains fluid to be dispensed.
  • the outlet valve member has 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 low piston urges said movable valve member towards its position. closing.
  • FIG. 1 is a schematic cross-sectional view of a pump according to an advantageous embodiment of the present invention, in . rest position,
  • FIG. 2 is a figure similar to that of FIG. 1, in the priming position,
  • the pump comprises a pump body 10 in which a high piston 20 and a low piston 30 slides in leaktight manner. 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 comprising a ball 41 cooperating with a corresponding valve seat 42.
  • the low piston 30, or an element 70 integral with the latter cooperates, when the dose is complete, with the outlet valve 50 to open it.
  • the dose can be complete at the end of the actuation stroke of the low piston 30, but it is also possible to have a full dose before the end of travel.
  • the outlet valve 50 opens before the low piston has completed its complete stroke.
  • 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 closure, in which it rests against its valve seat 52, by the pressure of the product disposed inside the pump chamber 11.
  • 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 withdraws 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 low piston 30 or an element integral with the latter 70 in the rest position of the pump so that the movable valve member 51 is biased towards its closed position.
  • the pump is in the rest position.
  • the user actuates the pump, he exerts an axial pressure on the top piston 20 which will slide inside the pump body 10.
  • the fluid contained in the pump chamber 11 being incompressible, this also causes the low piston 30 to slide in leaktight manner 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 similarly for the outlet valve 50, the movable valve member 51 of which is also urged towards its closed position by the pressure of the product inside the pump chamber 11.
  • the low piston 30 being less than the diameter of the high piston 20, the low piston 30, respectively the element secured to the low piston 30 and which is referenced 70 in the figures, moves faster than the high piston 20 during actuation of the pump. It thus passes from its position in which it is in contact with the second shoulder 56, shown in FIG. 1, towards its position in which it comes into contact with the first shoulder 55 of the movable valve member 51. At this time there, the low piston cooperates with the movable valve member 51 to move it axially inside the pump chamber, by removing it from its valve seat 52, in order to open the outlet valve 50 and thus allow the expulsion of the product contained in the pump chamber 11.
  • the distance between the shoulders 55 and 56 determines the opening time 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 dose volume to be dispensed, by modifying only one piece 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 in FIG. 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 brought back to its starting position by the spring 60 which acts on the valve seat 42.
  • the low piston 30 is produced separately from the inlet valve seat 42. The advantage of producing the low piston 30 separately will be described below with reference to Figure 2 in connection with a particular embodiment of the invention.
  • the bottom piston 30 is produced separately from the inlet valve seat 42.
  • the fact of producing the bottom piston 30 separately from the inlet valve seat 42, and mounting said bottom piston 30 floating at the interior of the pump body allows said bottom piston to be used as a priming element. Indeed, as visible in FIG.

Landscapes

  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Coating Apparatus (AREA)

Abstract

The invention concerns a fluid product dispensing pump comprising a pump body (10) including a pump chamber (11) delimited between a high piston (20) and a low piston (30), said pistons 820, 30) sealingly sliding in said pump body (10), said pump chamber (11) including an inlet valve (40) and an outlet valve (50), said low piston (30) co-operating, when the dose is filled up, with the outlet valve (50) to cause it to open and allow the product contained in the pump chamber (11) to be expelled. The invention is characterised in that the low piston (30) is separated from the inlet valve seat (42) and is mounted floating in the pump chamber (11) said low piston (30) being returned to its neutral position by said inlet valve seat (42).

Description

Pompe de distribution de produit fluide Fluid dispensing pump
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 to expel the product contained in said pump chamber. In certain cases the pump can comprise 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.
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. Il 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 certain cases, in particular with pharmaceutical products, the accuracy of the dosage, as well as the assurance of the distribution of a full dose at each actuation may be essential criteria. It is in particular 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 pump for dispensing a fluid product which guarantees the precision of the dosage on each actuation of the pump and which ensures the dispensing 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. 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. 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.The present invention also aims to provide such a fluid dispensing pump which is simple and inexpensive to manufacture and assemble. The present invention therefore relates to a fluid dispensing pump comprising a pump body comprising a pump chamber delimited between a high piston and a low piston, said pistons sliding in leaktight manner in said pump body, said pump chamber comprising an inlet valve and an outlet valve, said bottom piston cooperating, when the dose is complete, with said outlet valve for open it and allow the expulsion of the product contained in the pump chamber, characterized in that the low piston is separated from the inlet valve seat and is mounted floating in the pump chamber, said low piston being brought back towards its rest position by said inlet valve seat. Advantageously, the outlet valve comprises a movable valve member in the pump chamber and which is urged towards its closed position by the pressure of the product contained in the pump chamber, said movable valve member comprising a cooperating shoulder, when the dose is complete, with said low piston or an element integral with the latter, so that the low 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 outside diameter of the top piston is greater than the outside diameter of the bottom 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 urged 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 this urges the outlet valve towards its closed 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 evacuation passage is formed between the low piston, the high piston and the inlet valve seat to allow the evacuation of air from the pump chamber, said low piston sealingly closing 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 has 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 low piston urges said movable valve member towards its position. closing.
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 :Other characteristics and advantages of the present invention will appear more clearly during the following detailed description, made with reference to the accompanying drawings, given by way of non-limiting examples, in which:
- 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,- Figure 1 is a schematic cross-sectional view of a pump according to an advantageous embodiment of the present invention, in . rest position,
- la figure 2 est une figure similaire à celle de la figure 1 , en position d'amorçage,FIG. 2 is a figure similar to that of FIG. 1, in the priming position,
- 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. 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.- 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. With reference to the figures, the pump comprises a pump body 10 in which a high piston 20 and a low piston 30 slides in leaktight manner. 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 comprising 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 product to be expelled.
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 œuvre 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 the latter, cooperates, when the dose is complete, with the outlet valve 50 to open it. The dose can be complete at the end of the actuation stroke of the low piston 30, but it is also possible to have a full dose before the end of travel. In this case, the outlet valve 50 opens before the low piston has completed its complete stroke. 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 closure, in which it rests against its valve seat 52, by the pressure of the product disposed inside the pump chamber 11. This implementation ensures perfect sealing at the outlet valve, since it is impossible for it to open in an unwanted way 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 withdraws 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 low piston 30 or an element integral with the latter 70 in the rest position of the pump so 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 FIGS. 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.In Figure 1, the pump is in the rest position. When the user actuates the pump, he exerts an axial pressure on the top piston 20 which will slide inside the pump body 10. The fluid contained in the pump chamber 11 being incompressible, this also causes the low piston 30 to slide in leaktight manner 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 similarly for the outlet valve 50, the movable valve member 51 of which is also urged 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 shown in FIG. 3. The diameter of the low piston 30 being less than the diameter of the high piston 20, the low piston 30, respectively the element secured to the low piston 30 and which is referenced 70 in the figures, moves faster than the high piston 20 during actuation of the pump. It thus passes from its position in which it is in contact with the second shoulder 56, shown in FIG. 1, towards its position in which it comes into contact with the first shoulder 55 of the movable valve member 51. At this time there, the low piston cooperates with the movable valve member 51 to move it axially inside the pump chamber, by removing it from its valve seat 52, in order to open the outlet valve 50 and thus allow the expulsion of the product contained in the pump chamber 11. The distance between the shoulders 55 and 56 determines the opening time 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 dose volume to be dispensed, by modifying only one piece 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 1 1 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. 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.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 in FIG. 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 brought back to its starting position by the spring 60 which acts on the valve seat 42. According to the invention, the low piston 30 is produced separately from the inlet valve seat 42. The advantage of producing the low piston 30 separately will be described below with reference to Figure 2 in connection with a particular embodiment of the invention.
Lorsque le clapet de sortie 50 est ouvert, le produit contenu dans la chambre de pompe 1 1 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 1 1. 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. 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.When the outlet valve 50 is open, the product contained in the pump chamber 1 1 is therefore expelled from said pump chamber, the low piston rising inside the pump body 10 under the effect of the compressed spring 60 until the bottom piston 30, respectively the part 70 integral with said bottom piston 30, again abuts against the second shoulder 56 of the movable valve member 51 of the outlet valve 50 to urge it again towards its closed position. The vacuum created in the pump chamber by the expulsion of the product and the raising of the pistons opens the inlet valve 40, said ball therefore being lifted from its valve seat to allow the suction of a new dose of product to the interior of the pump chamber 1 1. The invention therefore provides the two essential advantages of guaranteeing on the one hand the expulsion of the entire dose on each actuation, by preventing any partial distribution of the contents of the chamber pump 11. Indeed, the outlet valve 50 cannot open before the dose is complete, whatever the actuation force exerted by the user on the pump. On the other hand, the dosing precision is guaranteed by the automatic closing of the outlet valve after the expulsion of the dose. According to the invention, the bottom piston 30 is produced separately from the inlet valve seat 42. The fact of producing the bottom piston 30 separately from the inlet valve seat 42, and mounting said bottom piston 30 floating at the interior of the pump body allows said bottom piston to be used as a priming element. Indeed, as visible in FIG. 2, on the first actuation of the pump, when the pump chamber 11 contains air, the low piston 30 comes off the inlet valve seat 42, since the air is compressible , and an exhaust air passage is created 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 high piston 20, and which cooperates with the low piston 30 at the end of the stroke of the first actuation of the pump, as shown in FIG. 2. This groove 29 therefore cooperates with the low piston 30 in a position which makes it possible to limit the dead volume of the pump chamber 11 as much as possible so that almost all of the air contained in said pump chamber is discharged into the position shown in Figure 2. When the utility isator releases the pressure on the pump from the position shown in Figure 2, the entire pump mechanism goes up 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 product enters the pump chamber 11, said bottom piston 30 is automatically biased by the product towards its position shown in FIGS. 1 and 3, in which the bottom piston 30 cooperates with the seat valve 42 for sealingly closing said air passage mentioned above. From this moment on, said low piston 30 can no longer detach from the valve seat 42 due to the presence of incompressible fluid inside the pump chamber 11. During subsequent actuations of the pump, the low piston 30 and the valve seat 42 then act as a single piece, ensuring a perfect seal, preventing any product leakage through said exhaust air passage used for priming of the pump. Of course, the embodiment shown in the figures is a particular advantageous embodiment, but it is entirely conceivable to provide other priming means for priming the pump, without necessarily using the low piston 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 can be made by those skilled in the art without departing from the scope of the present invention as defined by the appended claims.

Claims

Revendications claims
1.- Pompe de distribution de produit fluide comportant un corps de pompe (10) comprenant une chambre de pompe (11) délimitée entre un piston haut (20) et un piston bas (30), lesdits pistons (20, 30) coulissant de manière étanche dans ledit corps de pompe (10), ladite chambre de pompe (11) comportant un clapet d'entrée (40) et un clapet de sortie (50), ledit piston bas (30) coopérant, lorsque la dose est complète, avec ledit clapet de sortie (50) pour l'ouvrir et permettre l'expulsion du produit contenu dans la chambre de pompe (11), caractérisé en ce que le piston bas (30) est séparé du siège de clapet d'entrée (42) et est monté flottant dans la chambre de pompe (11), ledit piston bas (30) étant ramené vers sa position de repos par ledit siège de clapet d'entrée (42).1.- Fluid product distribution pump comprising a pump body (10) comprising a pump chamber (11) delimited between a high piston (20) and a low piston (30), said pistons (20, 30) sliding sealingly in said pump body (10), said pump chamber (11) comprising an inlet valve (40) and an outlet valve (50), said bottom piston (30) cooperating, when the dose is complete, with said outlet valve (50) to open it and allow the expulsion of the product contained in the pump chamber (11), characterized in that the low piston (30) is separated from the inlet valve seat (42 ) and is mounted floating in the pump chamber (11), said bottom piston (30) being returned to its rest position by said inlet valve seat (42).
2.- Pompe selon la revendication 1 , dans laquelle le clapet de sortie (50) comporte un organe de clapet (51) mobile dans la chambre de pompe (11) et qui est sollicitée vers sa position de fermeture par la pression du produit contenu dans la chambre de pompe (11), ledit organe de clapet mobile (51) comportant un épaulement (55) coopérant, lorsque la dose est complète, avec ledit piston bas (30) ou un élément (70) solidaire de celui-ci, de telle sorte que le piston bas (30) retire l'organe de clapet (51) de son siège de clapet (52) pour ouvrir le clapet de sortie (50).2.- Pump according to claim 1, wherein the outlet valve (50) comprises a valve member (51) movable in the pump chamber (11) and which is biased towards its closed position by the pressure of the product contained in the pump chamber (11), said movable valve member (51) comprising a shoulder (55) cooperating, when the dose is complete, with said low piston (30) or an element (70) integral with it, so that the bottom piston (30) removes the valve member (51) from its valve seat (52) to open the outlet valve (50).
3.- Pompe selon la revendication 1 ou la revendication 2, dans laquelle le diamètre extérieur du piston haut (20) est supérieur au diamètre extérieur du piston bas (30). 3.- Pump according to claim 1 or claim 2, wherein the outside diameter of the top piston (20) is greater than the outside diameter of the bottom piston (30).
4.- Pompe selon l'une quelconque des revendications précédentes, dans laquelle le siège de clapet (42) du clapet d'entrée (40) est sollicité par un élément élastique (60) tel qu'un ressort vers la position de repos de la pompe, dans laquelle ledit piston bas (30) ou un élément (70) solidaire de celui-ci sollicite le clapet de sortie (50) vers sa position de fermeture. 4.- Pump according to any one of the preceding claims, wherein the valve seat (42) of the inlet valve (40) is biased by an elastic element (60) such as a spring towards the rest position of the pump, in which said low piston (30) or an element (70) integral with the latter biases the outlet valve (50) towards its closed position.
5.- Pompe selon l'une quelconque des revendications précédentes, dans laquelle ledit piston bas (30) agit en tant qu'élément d'amorçage pour évacuer l'air contenu dans la chambre de pompe (11) lors du premier actionnement de la pompe. 5.- Pump according to any one of the preceding claims, wherein said low piston (30) acts as a priming element to evacuate the air contained in the pump chamber (11) during the first actuation of the pump.
6.- Pompe selon la revendication 5, dans laquelle, lorsque la chambre de pompe (11) contient de l'air, un passage d'évacuation d'air est formé entre le piston bas (30), le piston haut (20) et le siège de clapet d'entrée (42) pour permettre l'évacuation de l'air hors de la chambre de pompe (11), ledit piston bas (30) obturant de manière étanche ledit passage d'air lorsque la chambre de pompe (11) contient du produit fluide à distribuer.6.- Pump according to claim 5, wherein, when the pump chamber (11) contains air, an air discharge passage is formed between the low piston (30), the high piston (20) and the inlet valve seat (42) to allow the evacuation of air from the pump chamber (11), said low piston (30) sealing said air passage when the pump chamber (11) contains fluid to be dispensed.
7.- Pompe selon l'une quelconque des revendications précédentes, dans laquelle l'organe de clapet de sortie (51) comporte un second épaulement (56) qui coopère avec ledit piston bas (30) ou un élément (70) solidaire dudit piston bas (30) dans la position de repos de la pompe de telle sorte que le piston bas (30) sollicite ledit organe de clapet mobile (51) vers sa position de fermeture. 7.- Pump according to any one of the preceding claims, in which the outlet valve member (51) comprises a second shoulder (56) which cooperates with said bottom piston (30) or an element (70) integral with said piston. bottom (30) in the rest position of the pump so that the bottom piston (30) biases said movable valve member (51) toward its closed 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
FR0013569A FR2815675B1 (en) 2000-10-23 2000-10-23 FLUID PRODUCT DELIVERY PUMP
FR0013569 2000-10-23
PCT/FR2001/003257 WO2002034413A1 (en) 2000-10-23 2001-10-19 Fluid product dispensing pump

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

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EP01980614A Expired - Lifetime EP1328351B1 (en) 2000-10-23 2001-10-19 Fluid product dispensing pump

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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)

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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
DE602005004305D1 (en) * 2004-09-25 2008-02-21 Obrist Closures Switzerland SUPPLY PUMP
FR2878002B1 (en) * 2004-11-16 2011-01-21 Valois Sas FLUID PRODUCT DELIVERY PUMP AND DISPENSER HAVING SUCH A DELIVERY PUMP.
US8869824B2 (en) * 2007-08-30 2014-10-28 Perlick Corporation Check valve and shut-off reset device for liquid delivery systems
US7913714B2 (en) * 2007-08-30 2011-03-29 Perlick Corporation Check valve and shut-off reset device for liquid delivery systems

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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
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US6698623B2 (en) * 2002-04-17 2004-03-02 Valois S.A. Fluid dispenser pump

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AU2002212417A1 (en) 2002-05-06
US6811060B2 (en) 2004-11-02
DE60132907D1 (en) 2008-04-03
US20040011823A1 (en) 2004-01-22
FR2815675B1 (en) 2003-05-02
JP3878552B2 (en) 2007-02-07
JP2004527363A (en) 2004-09-09
FR2815675A1 (en) 2002-04-26
DE60132907T2 (en) 2009-02-12
CN1251806C (en) 2006-04-19
WO2002034413A1 (en) 2002-05-02
CN1494460A (en) 2004-05-05
EP1328351B1 (en) 2008-02-20

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