WO2003086650A1 - Distribution pump for a liquid product - Google Patents

Distribution pump for a liquid product Download PDF

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Publication number
WO2003086650A1
WO2003086650A1 PCT/FR2003/001182 FR0301182W WO03086650A1 WO 2003086650 A1 WO2003086650 A1 WO 2003086650A1 FR 0301182 W FR0301182 W FR 0301182W WO 03086650 A1 WO03086650 A1 WO 03086650A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
pump
head
outlet
product
Prior art date
Application number
PCT/FR2003/001182
Other languages
French (fr)
Inventor
Ludovic Petit
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
Priority to EP03740604A priority Critical patent/EP1497039B1/en
Priority to JP2003583649A priority patent/JP4295121B2/en
Priority to CN03808560.7A priority patent/CN1646231B/en
Priority to AU2003262156A priority patent/AU2003262156A1/en
Priority to DE60301572T priority patent/DE60301572T2/en
Publication of WO2003086650A1 publication Critical patent/WO2003086650A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1001—Piston pumps
    • 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

Definitions

  • the present invention relates to a fluid dispenser pump, and more particularly to a pump actuated manually to dispense a dose of fluid product on each actuation.
  • Pumps and in particular so-called “metering” pumps, which dispense a dose of product on each actuation, are well known in the state of the art. They are generally used to distribute fluid, such as pharmaceuticals, cosmetics, perfumery or the like.
  • a pump generally comprises a pump chamber delimited between an inlet valve of the pump chamber and an outlet valve of the pump chamber. During actuation, the inlet valve is closed automatically, and after a while, the outlet valve is open allowing the expulsion of the product contained in the pump chamber.
  • the outlet valve is then opened mechanically, preferably at the end of actuation, when the dose is complete, to open the passage and allow the product contained in the pump chamber to be expelled.
  • a pump is described in particular in French patent application FR 00-13569, filed on October 23, 2000.
  • the outlet valve being stressed during the actuation of the pump towards its closed position by the pressure of the product, then opened mechanically to allow the expulsion of this product, there is a risk that the flow of the product fluid out of the pump chamber after opening the outlet valve returns it to its closed position, so that the distribution of the dose of product may be incomplete.
  • the reproducibility of the dose is therefore not certain.
  • the object of the present invention is to provide a pump for dispensing a fluid product which does not have the abovementioned drawbacks.
  • the present invention thus aims to provide a fluid dispensing pump which guarantees the total distribution of each dose of fluid product at each actuation of the pump.
  • the present invention also aims to provide a fluid dispensing pump which is simple and inexpensive to manufacture and assemble.
  • the present invention therefore relates to a fluid dispenser pump actuated manually to dispense a dose of fluid product on each actuation, said pump comprising a pump body containing a pump chamber and a return spring resiliently urging the pump towards its rest position and automatically returning it to this rest position after each actuation, said pump chamber comprising an outlet valve, said outlet valve being, during actuation of the pump, stressed by the pressure of the product towards a position of closing and being opened mechanically by a valve control element at the end of actuation, when the dose is complete, characterized in that the pump includes valve blocking means to keep the outlet valve in the open position during expulsion of the product out of the pump chamber, to prevent the flow of the fluid product from closing said valve and outlet before the expulsion of the entire dose of fluid, said outlet valve being closed mechanically at the end of expulsion of the fluid by said valve control element, under the effect of said return spring of the pump.
  • the pump chamber is defined between a first piston and a second piston.
  • said valve blocking means consist in jamming the outlet valve in the open position.
  • said outlet valve comprises a valve element and a valve seat, said valve element comprising a valve head cooperating in leaktight manner with said valve seat in the closed position. of the valve, and a valve body extending axially from said valve head, the diameter of said valve body being less than the diameter of said head, said valve body comprising, on the side opposite to said valve head, a valve foot the diameter of which is greater than the diameter of said valve body, the valve control element being slidably mounted around said valve body and mechanically cooperating with said valve foot to open the outlet valve, and with said valve head valve to close the outlet valve.
  • valve seat is formed in said first piston, said valve head being inserted with friction in said first piston, a force greater than said friction force being necessary to move said valve head relative to said valve seat between its closing and opening positions.
  • valve seat is formed by an annular radial surface approximately perpendicular to the central axis of the pump and surrounding the inlet of an expulsion channel connecting the pump chamber to a dispensing orifice, said valve head. cooperating with said radial annular surface via a respective radial surface.
  • the first piston includes an axial sleeve in which said valve head slides, the internal diameter of said axial sleeve being slightly less than the external diameter of said valve head to define said friction force, and therefore the force necessary to move said head. valve relative to said valve seat.
  • said axial sleeve includes stop means, such as a radial shoulder, for defining the open position of said valve head.
  • the surface of said axial sleeve on which slides said valve head is at least partially frustoconical.
  • said valve head comprises means for passing the product, such as one or more opening (s) provided (s) on the periphery of said valve head.
  • the present invention also relates to a device for dispensing a fluid product comprising a pump as described above.
  • FIG. 1 is a schematic cross-sectional view of a fluid dispensing pump according to an advantageous embodiment of the present invention, in the pump's rest position, - Figure 2 is a view similar to that of FIG. 1, in the pump actuation position,
  • FIG. 3 is a schematic detail view in cross section showing on an enlarged scale the outlet valve of the pump of Figures 1 and 2, in the closed position of the outlet valve
  • - Figure 4 is a view similar to that of FIG. 3, in the open position of the outlet valve
  • FIG. 5 is a schematic view showing an alternative embodiment of the invention, in the closed position of the valve.
  • the present invention relates to a pump comprising a pump body 10 containing a pump chamber 11.
  • the pump chamber 11 is defined between a first piston 20, called “high piston” and a second piston 30 called “piston bottom ”, and the pump chamber 11 comprises an inlet valve 80 and an outlet valve 40.
  • the inlet valve 80 can advantageously be produced in the form of a ball cooperating with a suitable valve seat. As shown in Figures 1 and 2, the top piston
  • the pump 20 advantageously slides in a part of the pump body of larger diameter, and the low piston 30 slides in a part of the pump body of smaller diameter. This is classic for this type of pump.
  • the pump also comprises a return spring 50 which resiliently biases the pump towards its rest position shown in FIG. 1, and which automatically returns it to this rest position after each actuation.
  • the return spring 50 is disposed between the pump body and the inlet valve seat 80, but any other positioning of the return spring 50 is also possible.
  • the outlet valve 40 is designed so that during actuation of the pump, it is stressed by the pressure of the product contained inside the pump chamber 11 towards its closed position, said outlet valve 40 being mechanically opened by a valve control element 60 at the end of actuation when the dose is complete.
  • This valve control element 60 cooperates on the one hand with the outlet valve 40, and on the other hand with the low piston 30 or an element integral with the latter.
  • the pump comprises valve blocking means for turning the outlet valve 40 in the open position during the expulsion of the product from the pump chamber 11.
  • valve blocking means for turning the outlet valve 40 in the open position during the expulsion of the product from the pump chamber 11.
  • the outlet valve 40 is closed mechanically, at the end of expulsion of the fluid product, by said valve control element 60 under the effect of the return spring 50 of the pump.
  • the outlet valve blocking means consist of wedging the outlet valve 40 in the open position, as will be described below with reference to an advantageous embodiment of the present invention.
  • the outlet valve 40 comprises a valve element 41 which cooperates with a valve seat 42.
  • the valve element 41 comprises a valve head 43 which cooperates in leaktight manner with said valve seat 42 in valve 40 closed position.
  • the valve element 41 also includes a valve body 44 which in the example shown extends axially from said valve head 43.
  • the diameter of the valve body 44 is smaller. to the diameter of the valve head 43, and the valve body 44 comprises on the side opposite to said valve head 43, a foot valve 45 whose diameter is again greater than the diameter of said valve body 44. In this way, the valve body 44 defines a central part of smaller diameter disposed between the valve head 43 and the valve foot 45.
  • valve control element 60 is slidably mounted around said valve body 44, in particular around said portion of smaller diameter, and mechanically cooperates on the one hand with the valve foot 45 to open the outlet valve 40, and on the other hand with the valve head 43 to close the outlet valve 40.
  • opening and closing operations of the outlet valve are carried out mechanically by said valve control element 60.
  • the valve seat 42 of the outlet valve 40 is formed inside said first piston 20, or high piston, said valve head 43 being inserted with friction in said first piston 20. In this way, a higher force said friction force is necessary to move said valve head 43 relative to said valve seat 42 between these closed and open positions.
  • the valve seat 42 can be formed by a transverse or radial annular surface, approximately perpendicular to the central axis of the pump, and which surrounds the inlet 71 with an expulsion channel 70 connecting the pump chamber. 11 to a dispensing orifice.
  • the high piston 20 can be secured to an actuating rod which incorporates the central channel 70 for expelling the product.
  • the valve head 43 advantageously cooperates with said radial annular surface 42 via a respective radial surface 43 '.
  • a particular profile may be provided at the interface between said annular radial surfaces 42 and 43 'to promote the sealing of the outlet valve 40 in the closed position. The outlet valve 40 is thus urged towards its closed position as soon as a pressure is created in the pump chamber 11, which ensures a total tightness of said valve.
  • the top piston 20 comprises an internal axial sleeve 21 in which said valve head 43 slides.
  • the internal diameter of said axial sleeve 21 can be slightly less than the external diameter of said valve head 43. From this way we define said friction force between said valve head 43 and said axial sleeve 21 j and therefore also the force necessary to move said valve head 43 relative to said valve seat 42.
  • the sleeve axial 21 of the high piston 20 may include stop means 22, produced for example in the form of a continuous or segmented radial shoulder, to define the open position of said valve head 43.
  • the surface 23 of the sleeve axial 21 on which slides the valve head 43 can be at least partially frustoconical, narrowing between the closed position and the open position, as shown in Figure 5.
  • this frustoconical portion 23 can be combined with a abutment shoulder as described above.
  • the valve head 43 may include product passage means 48, for example made in the form of one or more opening (s) which may (wind) be provided ( s) on the periphery of said valve head 43.
  • the operation of the pump according to the invention is as follows.
  • the user actuates the pump from its rest position shown in FIG. 1, he requests the actuating rod, which is integral with the high piston 20, axially downwards in FIG. 1, which creates an overpressure inside the pump chamber 11.
  • This overpressure automatically closes the inlet valve 80 and causes the bottom piston 30 to move under the effect of the pressure created inside the pump chamber 11.
  • the diameter of the pump body in which the low piston slides being less than the diameter of the pump body in which the high piston slides, the low piston 30 moves axially faster than the high piston 20.
  • the low piston 30 cooperates with the control element 60 by means of a radial shoulder, so that when the low piston 30 moves axially, it drives with it said valve control member 60.
  • Said control element valve member 60 therefore slides around the valve body 44 of reduced diameter.
  • the valve element 41 moves together with the first piston 20 while the valve control element 60 moves together with the second piston 30, so that the valve control member 60 moves axially faster downward than the valve member 41.
  • the valve control member 60 reaches the lower end position , in which it cooperates by means of a shoulder 61 with the valve foot 45, it will then drive said valve element 41 axially downward, so that said valve element 41 will come off the valve seat 42 against which it was pressed by the pressure of the product contained in the pump chamber 11. As shown in FIG.
  • valve element 41 moves axially inside the sleeve internal axial 21 of the first piston 20 over a short distance A, sufficient to open a passage for the product contained in the pump chamber 11.
  • the product contained in said pump chamber 11 then flows through said product passage 48 towards said can al expulsion 70 contained inside said first piston 20.
  • the shoulder 22 (and / or the frustoconical surface 23), which can be provided in the side wall of the axial sleeve 21, advantageously defines the opening position of the valve outlet 40, shown in FIG. 4.
  • the external diameter of the valve head 43 is greater than the internal diameter of the axial sleeve 21.
  • valve control element 60 will mechanically close the outlet valve 40 by pushing axially the valve element 41 towards the high in tight contact with the valve seat 42, despite the friction force existing between the valve head 43 and the axial sleeve 21 of the high piston 20.
  • the present invention therefore provides a fluid dispensing pump in which the outlet valve is biased towards its closed position during the entire actuation stroke of the pump, which guarantees an absolute seal at this level, then is opened. mechanically at the end of the stroke to allow the expulsion of the product contained in the pump chamber, the distribution of the entire dose contained in the pump chamber being guaranteed by the fact that the outlet valve cannot accidentally close under the effect of the flow of product leaving before the end of expulsion of the product contained in the pump chamber.

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Abstract

The invention relates to a manually actuated distribution pump which is used to supply a dose of a liquid product each time it is actuated. Said pump comprises a pump housing (10) containing a pump chamber (11) and a return spring (50) which elastically brings the pump towards its neutral position and automatically brings it back into said neutral position after each actuation. Said pump chamber (11) comprises an outlet valve (40) which is pushed towards a closing position by the pressure of the product when the pump is actuated, and is mechanically opened by a valve control element (60) at the end of the actuation, when the dose is complete. The invention is characterised in that the distribution pump comprises valve blocking means for maintaining the outlet valve (40) in the open position while the product is ejected from the pump chamber (11), in order to prevent the flow of the liquid product from closing the outlet valve (40) before the entire dose of the liquid product has been ejected. Said outlet valve (40) is mechanically closed by the valve control element (60) by means of the return spring (50) of the pump once the liquid product has been ejected.

Description

Pompe de distribution de produit fluide Fluid dispensing pump
La présente invention concerne une pompe de distribution de produit fluide, et plus particulièrement une pompe actionnée manuellement pour distribuer une dose de produit fluide à chaque actionnement.The present invention relates to a fluid dispenser pump, and more particularly to a pump actuated manually to dispense a dose of fluid product on each actuation.
Les pompes, et notamment les pompes dites « doseuses », qui distribuent une dose de produit à chaque actionnement, sont bien connues dans l'état de la technique. Elles sont généralement utilisées pour distribuer du produit fluide, tels que des produits pharmaceutiques, cosmétiques, de la parfumerie ou similaire. Une telle pompe comporte généralement une chambre de pompe délimitée entre un clapet d'entrée de la chambre de pompe et un clapet de sortie de la chambre de pompe. Lors de l' actionnement, le clapet d'entrée est fermé automatiquement, et au bout d'un moment, le clapet de sortie est ouvert permettant l'expulsion du produit contenu dans la chambre de pompe. Pour améliorer le fonctionnement d'une telle pompe, il a été proposé de réaliser le clapet de sortie de la chambre de pompe de telle sorte que pendant l' actionnement de la pompe, la pression du produit à l'intérieur de la chambre de pompe sollicite le clapet de sortie vers sa position de fermeture, ce qui garantit une étanchéité absolue. Le clapet de sortie est ensuite ouvert mécaniquement, de préférence en fin d'actionnement, quand la dose est complète, pour ouvrir le passage et permettre l'expulsion du produit contenu dans la chambre de pompe. Une telle pompe est notamment décrite dans la demande de brevet français FR 00-13569, déposée le 23 octobre 2000. Bien que fonctionnant de manière satisfaisante, une telle pompe peut toutefois présenter un problème au niveau du fonctionnement du clapet de sortie. En effet, le clapet de sortie étant sollicité pendant l'actionnement de la pompe vers sa position de fermeture par la pression du produit, puis ouvert mécaniquement pour permettre l'expulsion de ce produit, il y a un risque que l'écoulement du produit fluide hors de la chambre de pompe après ouverture du clapet de sortie ramène celui-ci vers sa position de fermeture, de sorte que la distribution de la dose de produit risque d'être incomplète. La reproductibilité de la dose n'est donc pas certaine. La présente invention a pour but de fournir une pompe de distribution de produit fluide qui ne reproduit pas les inconvénients susmentionnés.Pumps, and in particular so-called “metering” pumps, which dispense a dose of product on each actuation, are well known in the state of the art. They are generally used to distribute fluid, such as pharmaceuticals, cosmetics, perfumery or the like. Such a pump generally comprises a pump chamber delimited between an inlet valve of the pump chamber and an outlet valve of the pump chamber. During actuation, the inlet valve is closed automatically, and after a while, the outlet valve is open allowing the expulsion of the product contained in the pump chamber. To improve the functioning of such a pump, it has been proposed to produce the outlet valve of the pump chamber so that during the actuation of the pump, the pressure of the product inside the pump chamber urges the outlet valve to its closed position, which guarantees absolute tightness. The outlet valve is then opened mechanically, preferably at the end of actuation, when the dose is complete, to open the passage and allow the product contained in the pump chamber to be expelled. Such a pump is described in particular in French patent application FR 00-13569, filed on October 23, 2000. Although operating satisfactorily, such a pump may however present a problem in terms of the operation of the outlet valve. Indeed, the outlet valve being stressed during the actuation of the pump towards its closed position by the pressure of the product, then opened mechanically to allow the expulsion of this product, there is a risk that the flow of the product fluid out of the pump chamber after opening the outlet valve returns it to its closed position, so that the distribution of the dose of product may be incomplete. The reproducibility of the dose is therefore not certain. The object of the present invention is to provide a pump for dispensing a fluid product which does not have the abovementioned drawbacks.
La présente invention a ainsi pour but de fournir une pompe de distribution de produit fluide qui garantit la distribution totale de chaque dose de produit fluide à chaque actionnement de la pompe.The present invention thus aims to provide a fluid dispensing pump which guarantees the total distribution of each dose of fluid product at each actuation of the pump.
La présente invention a également pour but de fournir une pompe de distribution de produit fluide qui soit simple et peu coûteuse à fabriquer et à assembler.The present invention also aims to provide a fluid dispensing pump which is simple and inexpensive to manufacture and assemble.
La présente invention a donc pour objet une pompe de distribution de produit fluide actionnée manuellement pour distribuer une dose de produit fluide à chaque actionnement, ladite pompe comportant un corps de pompe contenant une chambre de pompe et un ressort de rappel sollicitant élastiquement la pompe vers sa position de repos et la ramenant automatiquement dans cette position de repos après chaque actionnement, ladite chambre de pompe comportant un clapet de sortie, ledit clapet de sortie étant, pendant l'actionnement de la pompe, sollicité par la pression du produit vers une position de fermeture et étant ouvert mécaniquement par un élément de commande de clapet en fin d'actionnement, lorsque la dose est complète, caractérisée en ce que la pompe comporte des moyens de blocage de clapet pour maintenir le clapet de sortie en position ouverte pendant l'expulsion du produit hors de la chambre de pompe, pour éviter que l'écoulement du produit fluide ne referme ledit clapet de sortie avant l'expulsion de la totalité de la dose de produit fluide, ledit clapet de sortie étant fermé mécaniquement en fin d'expulsion du produit fluide par ledit élément de commande de clapet, sous l'effet dudit ressort de rappel de la pompe. Avantageusement, la chambre de pompe est définie entre un premier piston et un second piston.The present invention therefore relates to a fluid dispenser pump actuated manually to dispense a dose of fluid product on each actuation, said pump comprising a pump body containing a pump chamber and a return spring resiliently urging the pump towards its rest position and automatically returning it to this rest position after each actuation, said pump chamber comprising an outlet valve, said outlet valve being, during actuation of the pump, stressed by the pressure of the product towards a position of closing and being opened mechanically by a valve control element at the end of actuation, when the dose is complete, characterized in that the pump includes valve blocking means to keep the outlet valve in the open position during expulsion of the product out of the pump chamber, to prevent the flow of the fluid product from closing said valve and outlet before the expulsion of the entire dose of fluid, said outlet valve being closed mechanically at the end of expulsion of the fluid by said valve control element, under the effect of said return spring of the pump. Advantageously, the pump chamber is defined between a first piston and a second piston.
Avantageusement, lesdits moyens de blocage de clapet consistent en un coincement du clapet de sortie en position d'ouverture.Advantageously, said valve blocking means consist in jamming the outlet valve in the open position.
Avantageusement, ledit clapet de sortie comporte un élément de clapet et un siège de clapet, ledit élément de clapet comportant une tête de clapet coopérant de manière étanche avec ledit siège de clapet en position de fermeture du clapet, et un corps de clapet s'étendant axialement à partir de ladite tête de clapet, le diamètre dudit corps de clapet étant inférieur au diamètre de ladite tête, ledit corps de clapet comportant, du côté opposé à ladite tête de clapet, un pied de clapet dont le diamètre est supérieur au diamètre dudit corps de clapet, l'élément de commande de clapet étant monté coulissant autour dudit corps de clapet et coopérant mécaniquement avec ledit pied de clapet pour ouvrir le clapet de sortie, et avec ladite tête de clapet pour fermer le clapet de sortie.Advantageously, said outlet valve comprises a valve element and a valve seat, said valve element comprising a valve head cooperating in leaktight manner with said valve seat in the closed position. of the valve, and a valve body extending axially from said valve head, the diameter of said valve body being less than the diameter of said head, said valve body comprising, on the side opposite to said valve head, a valve foot the diameter of which is greater than the diameter of said valve body, the valve control element being slidably mounted around said valve body and mechanically cooperating with said valve foot to open the outlet valve, and with said valve head valve to close the outlet valve.
Avantageusement, le siège de clapet est formé dans ledit premier piston, ladite tête de clapet étant insérée avec frottement dans ledit premier piston, une force supérieure à ladite force de frottement étant nécessaire pour déplacer ladite tête de clapet par rapport audit siège de clapet entre ses positions de fermeture et d'ouverture.Advantageously, the valve seat is formed in said first piston, said valve head being inserted with friction in said first piston, a force greater than said friction force being necessary to move said valve head relative to said valve seat between its closing and opening positions.
Avantageusement, le siège de clapet est formé par une surface annulaire radiale environ perpendiculaire à l'axe central de la pompe et entourant l'entrée d'un canal d'expulsion reliant la chambre de pompe à un orifice de distribution, ladite tête de clapet coopérant avec ladite surface annulaire radiale par l'intermédiaire d'une surface radiale respective.Advantageously, the valve seat is formed by an annular radial surface approximately perpendicular to the central axis of the pump and surrounding the inlet of an expulsion channel connecting the pump chamber to a dispensing orifice, said valve head. cooperating with said radial annular surface via a respective radial surface.
Avantageusement, le premier piston comporte un manchon axial dans lequel coulisse ladite tête de clapet, le diamètre interne dudit manchon axial étant légèrement inférieur au diamètre externe de ladite tête de clapet pour définir ladite force de frottement, et donc la force nécessaire pour déplacer ladite tête de clapet par rapport audit siège de clapet.Advantageously, the first piston includes an axial sleeve in which said valve head slides, the internal diameter of said axial sleeve being slightly less than the external diameter of said valve head to define said friction force, and therefore the force necessary to move said head. valve relative to said valve seat.
Avantageusement, ledit manchon axial comporte des moyens de butée, tel qu'un épaulement radial, pour définir la position d'ouverture de ladite tête de clapet.Advantageously, said axial sleeve includes stop means, such as a radial shoulder, for defining the open position of said valve head.
Avantageusement, la surface dudit manchon axial sur laquelle coulisse ladite tête de clapet est au moins partiellement tronconique.Advantageously, the surface of said axial sleeve on which slides said valve head is at least partially frustoconical.
Avantageusement, ladite tête de clapet comporte des moyens de passage de produit, telle(s) qu'une ou plusieurs ouverture(s) prévue(s) sur la périphérie de ladite tête de clapet. La présente invention a également pour objet un dispositif de distribution de produit fluide comportant une pompe telle que décrite ci-dessus.Advantageously, said valve head comprises means for passing the product, such as one or more opening (s) provided (s) on the periphery of said valve head. The present invention also relates to a device for dispensing a fluid product comprising a pump as described above.
La présente invention va maintenant être décrite plus amplement en référence aux dessins joints, donnés à titre d'exemples non limitatifs, et sur lesquels :The present invention will now be described more fully with reference to the accompanying drawings, given by way of nonlimiting examples, and in which:
- la figure 1 est une vue schématique en section transversale d'une pompe de distribution de produit fluide selon un mode de réalisation avantageux de la présente invention, en position de repos de la pompe, - la figure 2 est une vue similaire à celle de la figure 1, en position d'actionnement de la pompe,- Figure 1 is a schematic cross-sectional view of a fluid dispensing pump according to an advantageous embodiment of the present invention, in the pump's rest position, - Figure 2 is a view similar to that of FIG. 1, in the pump actuation position,
- la figure 3 est une vue schématique de détail en section transversale représentant à échelle agrandie le clapet de sortie de la pompe des figures 1 et 2, en position de fermeture du clapet de sortie, - la figure 4 est une vue similaire à celle de la figure 3, en position d'ouverture du clapet de sortie, et- Figure 3 is a schematic detail view in cross section showing on an enlarged scale the outlet valve of the pump of Figures 1 and 2, in the closed position of the outlet valve, - Figure 4 is a view similar to that of FIG. 3, in the open position of the outlet valve, and
- la figure 5 est une vue schématique représentant une variante de réalisation de l'invention, en position de fermeture du clapet.- Figure 5 is a schematic view showing an alternative embodiment of the invention, in the closed position of the valve.
En référence aux dessins, la présente invention concerne une pompe comportant un corps de pompe 10 contenant une chambre de pompe 11. La chambre de pompe 11 est définie entre un premier piston 20, appelé « piston haut» et un second piston 30 appelé « piston bas », et la chambre de pompe 11 comporte un clapet d'entrée 80 et un clapet de sortie 40. Le clapet d'entrée 80 peut avantageusement être réalisé sous la forme d'une bille coopérant avec un siège de clapet approprié. Comme représenté sur les figures 1 et 2, le piston hautReferring to the drawings, the present invention relates to a pump comprising a pump body 10 containing a pump chamber 11. The pump chamber 11 is defined between a first piston 20, called "high piston" and a second piston 30 called "piston bottom ”, and the pump chamber 11 comprises an inlet valve 80 and an outlet valve 40. The inlet valve 80 can advantageously be produced in the form of a ball cooperating with a suitable valve seat. As shown in Figures 1 and 2, the top piston
20 coulisse avantageusement dans une partie de corps de pompe de plus grand diamètre, et le piston bas 30 coulisse dans une partie de corps de pompe de plus petit diamètre. Ceci est classique pour ce type de pompe. La pompe comporte en outre un ressort de rappel 50 qui sollicite élastiquement la pompe vers sa position de repos représentée sur la figure 1, et qui la ramène automatiquement vers cette position de repos après chaque actionnement. Dans l'exemple représenté, le ressort de rappel 50 est disposé entre le corps de pompe et le siège de clapet d'entrée 80, mais tout autre positionnement du ressort de rappel 50 est également envisageable.20 advantageously slides in a part of the pump body of larger diameter, and the low piston 30 slides in a part of the pump body of smaller diameter. This is classic for this type of pump. The pump also comprises a return spring 50 which resiliently biases the pump towards its rest position shown in FIG. 1, and which automatically returns it to this rest position after each actuation. In the example shown, the return spring 50 is disposed between the pump body and the inlet valve seat 80, but any other positioning of the return spring 50 is also possible.
Le clapet de sortie 40 est réalisé de telle sorte que pendant l' actionnement de la pompe, il est sollicité par la pression du produit contenu à l'intérieur de la chambre de pompe 11 vers sa position de fermeture, ledit clapet de sortie 40 étant ouvert mécaniquement par un élément de commande de clapet 60 en fin d'actionnement lorsque la dose est complète. Cet élément de commande de clapet 60 coopère d'une part avec le clapet de sortie 40, et d'autre part avec le piston bas 30 ou un élément solidaire de celui-ci.The outlet valve 40 is designed so that during actuation of the pump, it is stressed by the pressure of the product contained inside the pump chamber 11 towards its closed position, said outlet valve 40 being mechanically opened by a valve control element 60 at the end of actuation when the dose is complete. This valve control element 60 cooperates on the one hand with the outlet valve 40, and on the other hand with the low piston 30 or an element integral with the latter.
Selon l'invention, la pompe comporte des moyens de blocage de clapet pour mamtenrr le clapet de sortie 40 en position ouverte pendant l'expulsion du produit hors de la chambre de pompe 11. De cette manière, on évite que l'écoulement du produit fluide hors de la chambre de pompe 11 ne referme le clapet de sortie 40 avant que la totalité de la dose contenue dans ladite chambre de pompe 11 n'ait été expulsée. La fermeture du clapet de sortie 40 est ensuite réalisée mécaniquement, en fin d'expulsion du produit fluide, par ledit élément de commande de clapet 60 sous l'effet du ressort de rappel 50 de la pompe. De manière avantageuse, les moyens de blocage de clapet de sortie consistent en un coincement du clapet de sortie 40 en position d'ouverture, comme cela sera décrit ci-après en référence à un mode de réalisation avantageux de la présente invention.According to the invention, the pump comprises valve blocking means for turning the outlet valve 40 in the open position during the expulsion of the product from the pump chamber 11. In this way, it is avoided that the flow of the product fluid outside the pump chamber 11 closes the outlet valve 40 before the entire dose contained in said pump chamber 11 has been expelled. The outlet valve 40 is closed mechanically, at the end of expulsion of the fluid product, by said valve control element 60 under the effect of the return spring 50 of the pump. Advantageously, the outlet valve blocking means consist of wedging the outlet valve 40 in the open position, as will be described below with reference to an advantageous embodiment of the present invention.
Les figures 1 à 4 montrent un mode de réalisation avantageux de la présente invention. Dans ce mode de réalisation, le clapet de sortie 40 comporte un élément de clapet 41 qui coopère avec un siège de clapet 42. L'élément de clapet 41 comporte une tête de clapet 43 qui coopère de manière étanche avec ledit siège de clapet 42 en position de fermeture du clapet 40. L'élément de clapet 41 comporte également un corps de clapet 44 qui dans l'exemple représenté s'étend axialement à partir de ladite tête de clapet 43. Avantageusement, le diamètre du corps de clapet 44 est inférieur au diamètre de la tête de clapet 43, et le corps de clapet 44 comporte du côté opposé à ladite tête de clapet 43, un pied de clapet 45 dont le diamètre est à nouveau supérieur au diamètre dudit corps de clapet 44. De cette manière, le corps de clapet 44 définit une partie centrale de plus petit diamètre disposée entre la tête de clapet 43 et le pied de clapet 45. L'élément de commande de clapet 60 est monté coulissant autour dudit corps de clapet 44, en particulier autour de ladite partie de plus petit diamètre, et coopère mécaniquement d'une part avec le pied de clapet 45 pour ouvrir le clapet de sortie 40, et d'autre part avec la tête de clapet 43 pour refermer le clapet de sortie 40. Ces opérations d'ouverture et de fermeture du clapet de sortie sont réalisées de manière mécanique par ledit élément de commande de clapet 60. Avantageusement, le siège de clapet 42 du clapet de sortie 40 est formé à l'intérieur dudit premier piston 20, ou piston haut, ladite tête de clapet 43 étant insérée avec frottement dans ledit premier piston 20. De cette manière, une force supérieure à ladite force de frottement est nécessaire pour déplacer ladite tête de clapet 43 par rapport audit siège de clapet 42 entre ces positions de fermeture et d'ouverture. Avantageusement, le siège de clapet 42 peut être formé par une surface annulaire transversale 'ou radiale, environ perpendiculaire à l'axe central de la pompe, et qui entoure l'entrée 71 d'un canal d'expulsion 70 reliant la chambre de pompe 11 à un orifice de distribution. De manière classique, le piston haut 20 peut être solidaire d'une tige d'actionnement qui incorpore le canal central 70 pour l'expulsion du produit. La tête de clapet 43 coopère avantageusement avec ladite surface annulaire radiale 42 par l'intermédiaire d'une surface radiale respective 43'. Un profil particulier peut être prévu au niveau de l'interface entre lesdites surfaces radiales annulaires 42 et 43' pour favoriser l'étanchéité du clapet de sortie 40 en position de fermeture. Le clapet de sortie 40 est ainsi sollicité vers sa position de fermeture dès qu'une pression est créée dans la chambre de pompe 11, ce qui assure une étanchéité totale dudit clapet.Figures 1 to 4 show an advantageous embodiment of the present invention. In this embodiment, the outlet valve 40 comprises a valve element 41 which cooperates with a valve seat 42. The valve element 41 comprises a valve head 43 which cooperates in leaktight manner with said valve seat 42 in valve 40 closed position. The valve element 41 also includes a valve body 44 which in the example shown extends axially from said valve head 43. Advantageously, the diameter of the valve body 44 is smaller. to the diameter of the valve head 43, and the valve body 44 comprises on the side opposite to said valve head 43, a foot valve 45 whose diameter is again greater than the diameter of said valve body 44. In this way, the valve body 44 defines a central part of smaller diameter disposed between the valve head 43 and the valve foot 45. L the valve control element 60 is slidably mounted around said valve body 44, in particular around said portion of smaller diameter, and mechanically cooperates on the one hand with the valve foot 45 to open the outlet valve 40, and on the other hand with the valve head 43 to close the outlet valve 40. These opening and closing operations of the outlet valve are carried out mechanically by said valve control element 60. Advantageously, the valve seat 42 of the outlet valve 40 is formed inside said first piston 20, or high piston, said valve head 43 being inserted with friction in said first piston 20. In this way, a higher force said friction force is necessary to move said valve head 43 relative to said valve seat 42 between these closed and open positions. Advantageously, the valve seat 42 can be formed by a transverse or radial annular surface, approximately perpendicular to the central axis of the pump, and which surrounds the inlet 71 with an expulsion channel 70 connecting the pump chamber. 11 to a dispensing orifice. Conventionally, the high piston 20 can be secured to an actuating rod which incorporates the central channel 70 for expelling the product. The valve head 43 advantageously cooperates with said radial annular surface 42 via a respective radial surface 43 '. A particular profile may be provided at the interface between said annular radial surfaces 42 and 43 'to promote the sealing of the outlet valve 40 in the closed position. The outlet valve 40 is thus urged towards its closed position as soon as a pressure is created in the pump chamber 11, which ensures a total tightness of said valve.
Avantageusement, le piston haut 20 comporte un manchon axial interne 21 dans lequel coulisse ladite tête de clapet 43. Pour réaliser l'invention, le diamètre interne dudit manchon axial 21 peut être légèrement inférieur au diamètre externe de ladite tête de clapet 43. De cette manière on définit ladite force de frottement entre ladite tête de clapet 43 et ledit manchon axial 21 j et par conséquent également la force nécessaire pour déplacer ladite tête de clapet 43 par rapport audit siège de clapet 42. Avantageusement, comme représenté sur les figures 3 et 4, le manchon axial 21 du piston haut 20 peut comporter des moyens de butée 22, réalisés par exemple sous la forme d'un épaulement radial continu ou segmenté, pour définir la position d'ouverture de ladite tête de clapet 43. Avantageusement, la surface 23 du manchon axial 21 sur laquelle coulisse la tête de clapet 43 peut être au moins partiellement tronconique, en se rétrécissant entre la position de fermeture et la position d'ouverture, comme représenté sur la figure 5. Eventuellement, cette partie tronconique 23 peut être combinée avec un épaulement de butée tel que décrit ci-dessus. De plus, dans sa configuration particulière représentée sur les dessins, la tête de clapet 43 peut comporter des moyens de passage de produit 48, par exemple réalisés sous la forme d'une ou plusieurs ouverture(s) qui peut(vent) être prévue(s) sur la périphérie de ladite tête de clapet 43.Advantageously, the top piston 20 comprises an internal axial sleeve 21 in which said valve head 43 slides. To carry out the invention, the internal diameter of said axial sleeve 21 can be slightly less than the external diameter of said valve head 43. From this way we define said friction force between said valve head 43 and said axial sleeve 21 j and therefore also the force necessary to move said valve head 43 relative to said valve seat 42. Advantageously, as shown in FIGS. 3 and 4, the sleeve axial 21 of the high piston 20 may include stop means 22, produced for example in the form of a continuous or segmented radial shoulder, to define the open position of said valve head 43. Advantageously, the surface 23 of the sleeve axial 21 on which slides the valve head 43 can be at least partially frustoconical, narrowing between the closed position and the open position, as shown in Figure 5. Optionally, this frustoconical portion 23 can be combined with a abutment shoulder as described above. In addition, in its particular configuration shown in the drawings, the valve head 43 may include product passage means 48, for example made in the form of one or more opening (s) which may (wind) be provided ( s) on the periphery of said valve head 43.
Le fonctionnement de la pompe selon l'invention est le suivant. Lorsque l'utilisateur actionne la pompe à partir de sa position de repos représentée sur la figure 1, il sollicite la tige d'actionnement, qui est solidaire du piston haut 20, axialement vers le bas sur la figure 1, ce qui crée une surpression à l'intérieur de la chambre de pompe 11. Cette surpression ferme automatiquement le clapet d'entrée 80 et provoque un déplacement du piston bas 30 sous l'effet de la pression créée à l'intérieur de la chambre de pompe 11. Le diamètre du corps de pompe dans lequel coulisse le piston bas étant inférieur au diamètre du corps de pompe dans lequel coulisse le piston haut, le piston bas 30 se déplace plus vite axialement vers le bas que le piston haut 20. Comme visible sur les figures 1 et 2, le piston bas 30 coopère avec l'élément de commande 60 par rintermédiaire d'un épaulement radial, de sorte que lorsque le piston bas 30 se déplace axialement, il entraîne avec lui ledit organe de commande de clapet 60. Ledit élément de commande de clapet 60 coulisse donc autour du corps de clapet 44 de diamètre réduit. En effet, l'élément de clapet 41 se déplace ensemble avec le premier piston 20 alors que l'élément de commande de clapet 60 se déplace ensemble avec le second piston 30, de sorte que l'élément de commande de clapet 60 se déplace plus vite axialement vers le bas que l'élément de clapet 41. Lorsque l'élément de commande de clapet 60 arrive à la position d'extrémité inférieure, dans laquelle il coopère par l'intermédiaire d'un épaulement 61 avec le pied de clapet 45, il va alors entraîner ledit élément de clapet 41 axialement vers le bas, de sorte que ledit élément de clapet 41 va se décoller du siège de clapet 42 contre lequel il était pressé par la pression du produit contenu dans la chambre de pompe 11. Comme représenté sur la figure 4, l'élément de clapet 41, et notamment la tête de clapet 43, se déplace axialement à l'intérieur du manchon axial interne 21 du premier piston 20 sur une faible distance A, suffisante pour ouvrir un passage au produit contenu dans la chambre de pompe 11. Le produit contenu dans ladite chambre de pompe 11 s'écoule alors par ledit passage de produit 48 vers ledit canal d'expulsion 70 contenu à rintérieur dudit premier piston 20. L'épaulement 22 (et/ou la surface tronconique 23), qui peut être prévu dans la paroi latérale du manchon axial 21, définit avantageusement la positon d'ouverture du clapet de sortie 40, représenté sur la figure 4. Comme représenté schématiquement de manière très exagérée sur les figures 3 et 4, le diamètre externe de la tête de clapet 43 est supérieur au diamètre interne du manchon axial 21. Ceci provoque un coincement par frottement de ladite tête de clapet 43 dans ledit manchon axial 21, ledit frottement étant suffisant pour mamtenir ledit clapet de sortie 40 en position ouverture pendant toute la durée de l'expulsion du produit contenu dans la chambre de pompe 11. Il n'y a donc pas de risque que le clapet de sortie 40 se referme avant l'expulsion totale de la dose de produit contenu dans la chambre de pompe 11, ce qui rend la distribution et le fonctionnement de la pompe fiable et sûre, notamment en ce qui concerne la reproductibilité de la dose. Lorsque l'utilisateur relâche la pression sur la pompe, le ressort de rappel 50 ramène l'élément de commande 60 axialement vers le haut, de sorte que cet élément de commande de clapet coulisse à nouveau autour dudit corps de clapet 44 jusqu'à ce qu'il vienne coopérer avec la tête de clapet 43 par l'intermédiaire de son épaulement 61. La force de frottement entre la tête de clapet 43 et le manchon axial 21 est alors définie de telle sorte qu'elle est légèrement inférieure à la force exercée par le ressort de rappel 50 sur l'élément de commande de clapet 60. Ainsi, cet élément de commande de clapet 60 va refermer mécaniquement le clapet de sortie 40 en repoussant axialement l'élément de clapet 41 vers le haut en contact étanche avec le siège de clapet 42, malgré la force de frottement existant entre la tête de clapet 43 et le manchon axial 21 du piston haut 20.The operation of the pump according to the invention is as follows. When the user actuates the pump from its rest position shown in FIG. 1, he requests the actuating rod, which is integral with the high piston 20, axially downwards in FIG. 1, which creates an overpressure inside the pump chamber 11. This overpressure automatically closes the inlet valve 80 and causes the bottom piston 30 to move under the effect of the pressure created inside the pump chamber 11. The diameter of the pump body in which the low piston slides being less than the diameter of the pump body in which the high piston slides, the low piston 30 moves axially faster than the high piston 20. As can be seen in FIGS. 1 and 2, the low piston 30 cooperates with the control element 60 by means of a radial shoulder, so that when the low piston 30 moves axially, it drives with it said valve control member 60. Said control element valve member 60 therefore slides around the valve body 44 of reduced diameter. Indeed, the valve element 41 moves together with the first piston 20 while the valve control element 60 moves together with the second piston 30, so that the valve control member 60 moves axially faster downward than the valve member 41. When the valve control member 60 reaches the lower end position , in which it cooperates by means of a shoulder 61 with the valve foot 45, it will then drive said valve element 41 axially downward, so that said valve element 41 will come off the valve seat 42 against which it was pressed by the pressure of the product contained in the pump chamber 11. As shown in FIG. 4, the valve element 41, and in particular the valve head 43, moves axially inside the sleeve internal axial 21 of the first piston 20 over a short distance A, sufficient to open a passage for the product contained in the pump chamber 11. The product contained in said pump chamber 11 then flows through said product passage 48 towards said can al expulsion 70 contained inside said first piston 20. The shoulder 22 (and / or the frustoconical surface 23), which can be provided in the side wall of the axial sleeve 21, advantageously defines the opening position of the valve outlet 40, shown in FIG. 4. As shown schematically in a very exaggerated manner in FIGS. 3 and 4, the external diameter of the valve head 43 is greater than the internal diameter of the axial sleeve 21. This causes said friction to jam valve head 43 in said axial sleeve 21, said friction being sufficient to maintain said outlet valve 40 in the open position throughout the expulsion of the product contained in the pump chamber 11. There is therefore no risk that the outlet valve 40 closes before the total expulsion of the dose of product contained in the pump chamber 11, which makes the distribution and operation of the pump reliable and safe, in particular regarding dose reproducibility. When the user releases the pressure on the pump, the return spring 50 brings the control element 60 axially upward, so that this valve control element slides again around said valve body 44 until that it comes to cooperate with the valve head 43 by means of its shoulder 61. The friction force between the valve head 43 and the axial sleeve 21 is then defined so that it is slightly less than the force exerted by the return spring 50 on the valve control element 60. Thus, this valve control element 60 will mechanically close the outlet valve 40 by pushing axially the valve element 41 towards the high in tight contact with the valve seat 42, despite the friction force existing between the valve head 43 and the axial sleeve 21 of the high piston 20.
La présente invention fournit donc une pompe de distribution de produit fluide dans laquelle le clapet de sortie est sollicité vers sa position de fermeture pendant toute la course d'actionnement de la pompe, ce qui garantit une étanchéité absolue à ce niveau là, puis est ouvert mécaniquement en fin de course pour permettre l'expulsion du produit contenu dans la chambre de pompe, la distribution de la totalité de la dose contenue dans la chambre de pompe étant garantie par le fait que le clapet de sortie ne peut pas se refermer accidentellement sous l'effet du flux du produit sortant avant la fin d'expulsion du produit contenu dans la chambre de pompe.The present invention therefore provides a fluid dispensing pump in which the outlet valve is biased towards its closed position during the entire actuation stroke of the pump, which guarantees an absolute seal at this level, then is opened. mechanically at the end of the stroke to allow the expulsion of the product contained in the pump chamber, the distribution of the entire dose contained in the pump chamber being guaranteed by the fact that the outlet valve cannot accidentally close under the effect of the flow of product leaving before the end of expulsion of the product contained in the pump chamber.
La présente invention a été décrite en référence à un mode de réalisation particulier de celle-ci, mais il est entendu que toute modification peut y être apportée par un homme du métier sans sortir du cadre de la présente invention tel que défini par les revendications annexées. En particulier, la forme spécifique du clapet de sortie, à savoir de son élément de clapet et du siège de clapet, ainsi que la forme de l'élément de commande de clapet pouvant être réalisée de manière différente, à condition qu'ils réalisent la fonction d'ouverture et de fermeture mécanique dudit clapet de sortie. On peut aussi envisager des moyens de blocage du clapet de sortie en position d'ouverture qui soient réalisés de manière différente d'un coincement. Par exemple, on pourrait utiliser des moyens de blocage mécaniques qui empêcheraient une fermeture du clapet de sortie jusqu'à ce que ces moyens de blocage soient libérés d'une quelconque manière au moment du retour de la pompe vers sa position de repos, après chaque actionnement. D'autres variantes sont également envisageables. The present invention has been described with reference to a particular embodiment thereof, but it is understood that any modification may be made to it by a person skilled in the art without departing from the scope of the present invention as defined by the appended claims . In particular, the specific shape of the outlet valve, namely of its valve element and of the valve seat, as well as the shape of the valve control element which can be produced in different ways, provided that they achieve the mechanical opening and closing function of said outlet valve. It is also possible to envisage means for blocking the outlet valve in the open position which are produced differently from jamming. For example, mechanical locking means could be used which would prevent closing of the outlet valve until these locking means are released in any way when the pump returns to its rest position, after each actuation. Other variants are also possible.

Claims

Revendications claims
1.- Pompe de distribution de produit fluide actionnée manuellement pour distribuer une dose de produit fluide à chaque actionnement, ladite pompe comportant un corps de pompe (10) contenant une chambre de pompe (11) et un ressort de rappel (50) sollicitant élastiquement la pompe vers sa position de repos et la ramenant automatiquement dans cette position de repos après chaque actionnement, ladite chambre de pompe (11) comportant un clapet de sortie (40), ledit clapet de sortie (40) étant, pendant l'actionnement de la pompe, sollicité par la pression du produit vers une position de fermeture et étant ouvert mécaniquement par un élément de commande de clapet (60) en fin d'actionnement, lorsque la dose est complète, caractérisée en ce que la pompe comporte des moyens de blocage de clapet pour mamtenir le clapet de sortie (40) en position ouverte pendant l'expulsion du produit hors de la chambre de pompe (11), pour éviter que l'écoulement du produit fluide ne referme ledit clapet de sortie (40) avant l'expulsion de la totalité de la dose de produit fluide, ledit clapet de sortie (40) étant fermé mécaniquement en fin d'expulsion du produit fluide par ledit élément de commande de clapet (60), sous l'effet dudit ressort de rappel (50) de la pompe.1.- Fluid dispensing pump manually actuated to dispense a dose of fluid product on each actuation, said pump comprising a pump body (10) containing a pump chamber (11) and a return spring (50) urging elastically the pump to its rest position and automatically returning it to this rest position after each actuation, said pump chamber (11) comprising an outlet valve (40), said outlet valve (40) being, during actuation of the pump, urged by the pressure of the product towards a closed position and being opened mechanically by a valve control element (60) at the end of actuation, when the dose is complete, characterized in that the pump comprises means for valve blocking to hold the outlet valve (40) in the open position during the expulsion of the product from the pump chamber (11), to prevent the flow of the fluid product from closing said c the outlet flap (40) before the expulsion of the entire dose of fluid product, said outlet valve (40) being mechanically closed at the end of expulsion of the fluid product by said valve control element (60), under the effect of said return spring (50) of the pump.
2.- Pompe selon la revendication 1, dans laquelle la chambre de pompe (11) est définie entre un premier piston (20) et un second piston2.- Pump according to claim 1, wherein the pump chamber (11) is defined between a first piston (20) and a second piston
(30).(30).
3.- Pompe selon la revendication 1 ou 2, dans laquelle lesdits moyens de blocage de clapet consistent en un coincement du clapet de sortie (40) en position d'ouverture. 3.- Pump according to claim 1 or 2, wherein said valve blocking means consist of a jamming of the outlet valve (40) in the open position.
4.- Pompe selon l'une quelconque des revendications précédentes, dans laquelle ledit clapet de sortie (40) comporte un élément de clapet (41) et un siège de clapet (42), ledit élément de clapet (41) comportant une tête de clapet (43) coopérant de manière étanche avec ledit siège de clapet (42) en position de fermeture du clapet (40), et un corps de clapet (44) s'étendant axialement à partir de ladite tête de clapet (43), le diamètre dudit corps de clapet (44) étant inférieur au diamètre de ladite tête (43), ledit corps de clapet (44) comportant du côté opposé à ladite tête de clapet (43), un pied de clapet (45) dont le diamètre est supérieur au diamètre dudit corps de clapet (44), l'élément de commande de clapet (60) étant monté coulissant autour dudit corps de clapet (44) et coopérant mécaniquement avec ledit pied de clapet (45) pour ouvrir le clapet de sortie (40), et avec ladite tête de clapet (43) pour fermer le clapet de sortie (40).4.- Pump according to any one of the preceding claims, in which said outlet valve (40) comprises a valve element (41) and a valve seat (42), said valve element (41) comprising a head. valve (43) cooperating sealingly with said valve seat (42) in the valve closed position (40), and a valve body (44) extending axially from said valve head (43), the diameter of said valve body (44) being less than the diameter of said head (43), said valve body (44) comprising, on the side opposite to said valve head (43), a valve foot (45) whose diameter is greater than diameter of said valve body (44), the valve control element (60) being slidably mounted around said valve body (44) and mechanically cooperating with said valve foot (45) to open the outlet valve (40) , and with said valve head (43) to close the outlet valve (40).
5.- Pompe selon la revendication 4, dans laquelle le siège de clapet (42) est formé dans ledit premier piston (20), ladite tête de clapet (43) étant insérée avec frottement dans ledit premier piston (20), une force supérieure à ladite force de frottement étant nécessaire pour déplacer ladite tête de clapet (43) par rapport audit siège de clapet (42) entre ses positions de fermeture et d'ouverture.5.- Pump according to claim 4, wherein the valve seat (42) is formed in said first piston (20), said valve head (43) being inserted with friction in said first piston (20), a higher force said frictional force being necessary to move said valve head (43) relative to said valve seat (42) between its closed and open positions.
6.- Pompe selon la revendication 5, dans laquelle le siège de clapet (42) est formé par une surface annulaire radiale environ perpendiculaire à l'axe central de la pompe et entourant l'entrée (71) d'un canal d'expulsion (70) reliant la chambre de pompe (11) à un orifice de distribution, ladite tête de clapet (43) coopérant avec ladite surface annulaire radiale (42) par intermédiaire d'une surface radiale respective (43'). 6.- Pump according to claim 5, wherein the valve seat (42) is formed by a radial annular surface approximately perpendicular to the central axis of the pump and surrounding the inlet (71) of an expulsion channel. (70) connecting the pump chamber (11) to a dispensing orifice, said valve head (43) cooperating with said radial annular surface (42) via a respective radial surface (43 ').
7.- Pompe selon la revendication 5 ou 6, dans laquelle le premier piston (20) comporte un manchon axial (21) dans lequel coulisse ladite tête de clapet (43), le diamètre interne dudit manchon axial (21) étant légèrement inférieur au diamètre externe de ladite tête de clapet (43) pour définir ladite force de frottement, et donc la force nécessaire pour déplacer ladite tête de clapet (43) par rapport audit siège de clapet (42).7.- Pump according to claim 5 or 6, wherein the first piston (20) comprises an axial sleeve (21) in which slides said valve head (43), the internal diameter of said axial sleeve (21) being slightly less than external diameter of said valve head (43) to define said friction force, and therefore the force necessary to move said valve head (43) relative to said valve seat (42).
8.- Pompe selon la revendication 7, dans laquelle ledit manchon axial (21) comporte des moyens de butée (22), tel qu'un épaulement radial, pour définir la position d'ouverture de ladite tête de clapet (43).8.- Pump according to claim 7, wherein said axial sleeve (21) comprises stop means (22), such as a radial shoulder, to define the open position of said valve head (43).
9.- Pompe selon la revendication 7 ou 8, dans laquelle la surface (23) dudit manchon axial (21) sur laquelle couhsse ladite tête de clapet (43) est au moins partiellement tronconique. 9.- Pump according to claim 7 or 8, wherein the surface (23) of said axial sleeve (21) on which couhsse said valve head (43) is at least partially frustoconical.
10.- Pompe selon l'une quelconque des revendications 4 à 9, dans laquelle ladite tête de clapet (43) comporte des moyens de passage de produit (48), telle(s) qu'une ou plusieurs ouverture(s) prévue(s) sur la périphérie de ladite tête de clapet (43).10.- Pump according to any one of claims 4 to 9, wherein said valve head (43) comprises product passage means (48), such (s) as one or more opening (s) provided ( s) on the periphery of said valve head (43).
11.- Dispositif de distribution de produit fluide, caractérisé en ce qu'il comporte une pompe selon l'une quelconque des revendications précédentes. 11. A device for dispensing a fluid product, characterized in that it comprises a pump according to any one of the preceding claims.
PCT/FR2003/001182 2002-04-17 2003-04-14 Distribution pump for a liquid product WO2003086650A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP03740604A EP1497039B1 (en) 2002-04-17 2003-04-14 Distribution pump for a liquid product
JP2003583649A JP4295121B2 (en) 2002-04-17 2003-04-14 Fluid dispenser pump
CN03808560.7A CN1646231B (en) 2002-04-17 2003-04-14 Distributor for a liquid product
AU2003262156A AU2003262156A1 (en) 2002-04-17 2003-04-14 Distribution pump for a liquid product
DE60301572T DE60301572T2 (en) 2002-04-17 2003-04-14 DISTRIBUTION PUMP FOR MEDIA

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0204809A FR2838783B1 (en) 2002-04-17 2002-04-17 FLUID PRODUCT DISPENSING PUMP
FR02/04809 2002-04-17

Publications (1)

Publication Number Publication Date
WO2003086650A1 true WO2003086650A1 (en) 2003-10-23

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Application Number Title Priority Date Filing Date
PCT/FR2003/001182 WO2003086650A1 (en) 2002-04-17 2003-04-14 Distribution pump for a liquid product

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EP (1) EP1497039B1 (en)
JP (1) JP4295121B2 (en)
CN (1) CN1646231B (en)
AU (1) AU2003262156A1 (en)
DE (1) DE60301572T2 (en)
FR (1) FR2838783B1 (en)
WO (1) WO2003086650A1 (en)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
JP2007511339A (en) * 2003-11-07 2007-05-10 バルワー エス．アー．エス． Fluid product dosing pump
US20140001213A1 (en) * 2011-03-25 2014-01-02 Aptar France S.A.S. Pump for dispensing a fluid material

Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
GB0610666D0 (en) * 2006-05-30 2006-07-05 Glaxo Group Ltd Fluid dispenser
DE102009006428B4 (en) * 2009-01-23 2011-06-22 Ing. Erich Pfeiffer GmbH, 78315 discharge
CN103721881B (en) * 2013-12-13 2016-06-29 中山市美捷时包装制品有限公司 The aerosol apparatus of mouth structure grabbed by a kind of band easy to connect
CN107934182A (en) * 2017-12-22 2018-04-20 余姚晟祺塑业有限公司 A kind of new type nozzle

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EP0614702A2 (en) * 1993-03-08 1994-09-14 SPRÜHVENTILE GmbH Fluid pump dispenser for pharmaceutical applications

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US5697530A (en) * 1996-01-29 1997-12-16 Monturas, S.A. Precompression pump sprayer
FR2764005B1 (en) * 1997-05-29 2004-12-10 Sofab ARTICULATED PISTON PUMP

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Publication number Priority date Publication date Assignee Title
EP0614702A2 (en) * 1993-03-08 1994-09-14 SPRÜHVENTILE GmbH Fluid pump dispenser for pharmaceutical applications

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007511339A (en) * 2003-11-07 2007-05-10 バルワー エス．アー．エス． Fluid product dosing pump
JP4825678B2 (en) * 2003-11-07 2011-11-30 バルワー エス．アー．エス． Fluid product dosing pump
US20140001213A1 (en) * 2011-03-25 2014-01-02 Aptar France S.A.S. Pump for dispensing a fluid material
US9364842B2 (en) * 2011-03-25 2016-06-14 Aptar France Sas Pump for dispensing a fluid material

Also Published As

Publication number Publication date
CN1646231B (en) 2010-09-29
CN1646231A (en) 2005-07-27
DE60301572D1 (en) 2005-10-13
EP1497039B1 (en) 2005-09-07
FR2838783B1 (en) 2004-07-09
JP2005526603A (en) 2005-09-08
AU2003262156A1 (en) 2003-10-27
FR2838783A1 (en) 2003-10-24
DE60301572T2 (en) 2006-06-22
JP4295121B2 (en) 2009-07-15
EP1497039A1 (en) 2005-01-19

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