EP1194247B1 - Improved pre-compression spray pump - Google Patents

Improved pre-compression spray pump Download PDF

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Publication number
EP1194247B1
EP1194247B1 EP20000951630 EP00951630A EP1194247B1 EP 1194247 B1 EP1194247 B1 EP 1194247B1 EP 20000951630 EP20000951630 EP 20000951630 EP 00951630 A EP00951630 A EP 00951630A EP 1194247 B1 EP1194247 B1 EP 1194247B1
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EP
European Patent Office
Prior art keywords
pump
outlet valve
inlet valve
valve
lever element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP20000951630
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German (de)
French (fr)
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EP1194247A1 (en
Inventor
Ludovic Petit
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aptar France SAS
Original Assignee
Valois SAS
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Publication date
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Publication of EP1194247A1 publication Critical patent/EP1194247A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1038—Pressure accumulation pumps, i.e. pumps comprising a pressure accumulation chamber
    • B05B11/1039—Pressure accumulation pumps, i.e. pumps comprising a pressure accumulation chamber the outlet valve being mechanically opened 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
    • B05B11/1001—Piston pumps

Definitions

  • the present invention relates to a precompression pump for dispensing metered quantities of fluid, and more particularly a precompression pump in which the distribution of the product is carried out independently of the force actuation exerted on the pump by the user.
  • the outlet valve of the pump chamber must guarantee that the sealing chamber is completely sealed pump during the entire actuation stroke of the pump, and only open at the very end actuation of said pump to allow the expulsion of the product.
  • this outlet valve is produced under the form of an elastically deformable sleeve disposed between the pump body and the rod mobile pump actuation. This valve must be rigid enough not to deform during actuation of the pump under the effect of the pressure created in the pump chamber. Its opening by elastic deformation is carried out at the end actuation using a shoulder formed in the pump body.
  • This type of valve has the disadvantage that it must be both rigid enough not to deform before the end of the pump stroke, and sufficiently deformable for, at the end actuation, deform without exaggerated effort under the effect of a mechanical cam. A a satisfactory balance between these two conflicting requirements is difficult to find and the reliable operation of the pump may be impaired by said outlet valve. In particular, the slightest differences in size or stiffness due to the manufacturing tolerances of the outlet valve can cause such a malfunction.
  • the present invention also aims to provide such a pump to precompression which is simple and easy to manufacture and assemble, and reliable in its use.
  • the present invention also aims to provide such a pump to precompression which ensures a total and reproducible distribution of the content of the pump chamber on each actuation, regardless of actuation force of the user.
  • the object of the present invention is therefore to distribute metered quantities of product fluid, comprising a piston integral with an actuating rod and sliding in a pump body comprising a pump chamber defined between an inlet valve and a outlet valve, characterized in that, upon actuation, said outlet valve is biased towards its closed position by the pressure of the product contained in the chamber pump, and in that, at the end of actuation of the pump, a lever element moves said outlet valve to its open position to allow the expulsion of the product contained in the pump chamber.
  • the outlet valve of the pump of the present invention is not required to withstand the pressure of the product during any the pump actuation stroke, but is instead biased towards its position of closure by said product contained in the pump chamber. So there is no risk anticipated opening of the outlet valve.
  • the fact that the outlet valve is biased towards its closed position by the pressure of the product contained in the chamber pump it is not required to be made with a predetermined rigidity, and its opening at the end of the actuation stroke, by a lever element is easily obtained without having to overcome a resistance to deformation inherent in the material of the outlet valve, as is the case in the devices of the prior state.
  • said lever element slides with said piston and said check valve. outlet to a cam member integral with the pump body which, at the end of actuation of the pump deforms and / or moves the lever element to open the outlet valve.
  • said cam member is formed by a shoulder of the body of pump.
  • said lever element is made in one piece with said outlet valve.
  • said inlet valve in the pump rest position, said inlet valve is stressed towards its open position by a spring and, when the pump is actuated, said inlet valve is biased towards its closed position and moves by compressing the spring under the effect of the pressure of the product contained in the pump chamber, said spring being suddenly released when opening the outlet valve at the end pump actuation, thereby returning the inlet valve to its rest position and expelling the product contained in the pump chamber regardless of the force actuation exerted on the pump by the user.
  • said spring of the inlet valve in addition to the expulsion of the product, also returns the piston to its rest position.
  • said inlet valve is produced in the form of a hollow cylinder closed on one side by a bottom wall, the edge of the open end of said hollow cylinder cooperating, from the start of actuation of the pump, with a cylinder of the body pump to close the inlet valve, the spring resting on the one hand on the bottom wall of the inlet valve and on the other hand on a part of the pump body.
  • the present invention also relates to a product distribution device fluid, characterized in that it comprises such a precompression pump.
  • a precompression pump comprises a pump body 3 in which slides a piston 1 secured to an actuating rod 2 on which the user presses to activate the pump. Piston 1 slides in a pump 10 defined in the pump body 3 between an inlet valve 11 and a valve exit 12.
  • the outlet valve 12 is produced so that when actuation of the pump, it is urged towards its closed position by the pressure of the product contained in pump chamber 10. It is only at the end of actuation of the pump that said outlet valve 12 is moved to its open position for allow the expulsion of the product contained in the pump chamber 10.
  • This opening is made, according to the invention, using a lever element 30, which is preferably disposed between the actuating rod 2 and said outlet valve 12.
  • the lever element 30 is disposed between the outlet valve 12 and the actuating rod 2, the unit formed by the actuating rod 2, the check valve outlet 12 and of the lever element 30 sliding in the pump body 3, together with the piston 1, when the pump is actuated.
  • the pump body 3 comprises a cam member 4 which, at the end of actuation of the pump, as shown in Figure 3, deforms and / or moves the lever member 30 to open the outlet valve 12.
  • this cam member 4 can be produced by a shoulder of the pump body.
  • the present invention applies more particularly to precompression pumps in which the product contained in the pump chamber 10 is expelled regardless of the actuating force exerted by the user.
  • the inlet valve 11 can cooperate with a spring 20 which, when the pump, is compressed by the movement of the inlet valve 11 under the effect of pressure created in the pump chamber 10.
  • said spring 20 of the inlet valve 11 also acts as a return spring for the pump, thus returning the piston 1 to its rest position after expulsion of the product.
  • said inlet valve 11 can be produced in the form of a cylinder hollow 10 closed on one side by a bottom wall 111, the edge 113 of the open end of said hollow cylinder 10 cooperating from the start of actuation of the pump with a cylinder 7 of the pump body 3 to close the inlet valve 11.
  • the spring 20 is supported advantageously on the one hand on the bottom wall 111 of the inlet valve 11 and on the other hand on a part 9 of the pump body 3.
  • the invention is not limited to this advantageous construction of the inlet valve.
  • the operation of the pump is therefore as follows: in the rest position of the pump, shown in Figure 1, the inlet valve 11 is biased towards its position opening by the spring 20.
  • the inlet valve 11 is biased towards its closed position by the pressure of the product contained in the chamber pump 10 and moves by compressing the spring 20 under the effect of said pressure of the product.
  • the outlet valve 12 is biased towards its closed position also by the pressure of the product contained in the pump chamber 10, as represented in figure 2.
  • the outlet valve 12 is opened by the lever element 30 cooperating with the shoulder 4 of the pump body, which suddenly releases the spring 20, the latter thus bringing the inlet valve 11 towards its starting position by expelling the product contained in the pump chamber 10 regardless of the actuating force exerted on the pump by the user.
  • the reliability of the pump on the invention is improved by the fact that the outlet valve 12 does not risk not open before the end of the pump actuation stroke.
  • valve outlet 12 and the lever element 30 are produced separately.
  • the outlet valve 12 is arranged at the lower end of the actuating rod 2 inside the chamber pump 10, and the lever element 30 is advantageously disposed between the rod actuator 2 and said outlet valve 12.
  • the latter may advantageously include a radial wall 121, which holds the lever element 30 between the lower end of the actuating rod 2 and said valve 12.
  • the outlet valve 12 and the element of lever 30 are made in one piece.
  • the lever portion 30 of the check valve outlet 12 is produced by a radial wall cooperating at its radially external end with the shoulder 4 of the pump body and provided with a support member 31 which cooperates with the lower end of the actuating rod 2.
  • the lever element part 30 is connected to the central body of the outlet valve 12 in a deformable manner so that when the valve outlet 12 arrives on the shoulder 4 of the pump body, the radially outer end of said lever part 30 rests on said shoulder 4, while the upper end of the support member 31 cooperates with the actuating rod 2.
  • FIG. 5 another alternative embodiment is shown, in which the inlet valve 11 incorporates a ball 211.
  • This ball 211 is stressed during actuation of the pump in its closed position and lifts from its seat valve to allow filling of the metering chamber 10, when the pump returns to its rest position.
  • the filling of the pump is carried out gradually during the return of the piston to its position of rest.
  • FIG. 5 thus shows that the outlet valve 12 can extend so any in the actuating rod.

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

Abstract

The invention concerns a pre-compression spray pump for dispensing measured amounts of a fluid product, comprising a piston (1) integral with an actuating rod (2) and sliding in a pump body (3) comprising a pump chamber (10) defined between an intake valve (11) and an outlet valve (12). The invention is characterised in that when the pump is actuated, the outlet valve (12) is urged towards its closing position by the pressure of the product contained in the pump chamber (10), and when the pump ceases to be actuated, a lever element (30) moves said outlet valve (12) towards its opening position to enable the product contained in the pump chamber (10) to be expelled.

Description

La présente invention concerne une pompe à précompression pour distribuer des quantités dosées de produit fluide, et plus particulièrement une pompe à précompression dans laquelle la distribution du produit est réalisée indépendamment de la force d'actionnement exercée sur la pompe par l'utilisateur.The present invention relates to a precompression pump for dispensing metered quantities of fluid, and more particularly a precompression pump in which the distribution of the product is carried out independently of the force actuation exerted on the pump by the user.

Les documents WO 87/04373 et EP-0 265 270 divulguent des pompes de ce type. Lors de l'actionnement de la pompe, un ressort est comprimé sous l'effet de la pression créée à l'intérieur de la chambre de pompe, ledit ressort étant libéré en fin d'actionnement après ouverture d'un clapet de sortie, de sorte que la dose de produit contenue dans la chambre de pompe est expulsée par ledit ressort, indépendamment de la force d'actionnement de l'utilisateur.Documents WO 87/04373 and EP-0 265 270 disclose pumps of this type. When the pump is actuated, a spring is compressed under the effect of pressure created inside the pump chamber, said spring being released at the end of actuation after opening an outlet valve, so that the dose of product contained in the pump chamber is expelled by said spring, regardless of the force user activation.

Pour assurer un fonctionnement fiable de ce type de dispositif, le clapet de sortie de la chambre de pompe doit garantir l'obturation totalement étanche de la chambre de pompe pendant toute la course d'actionnement de la pompe, et ne s'ouvrir qu'en toute fin d'actionnement de ladite pompe pour permettre l'expulsion du produit. Dans les documents de l'état de la technique susmentionnés, ce clapet de sortie est réalisé sous la forme d'un manchon élastiquement déformable disposé entre le corps de pompe et la tige d'actionnement mobile de la pompe. Ce clapet doit être suffisamment rigide pour ne pas se déformer pendant l'actionnement de la pompe sous l'effet de la pression créée dans la chambre de pompe. Son ouverture par déformation élastique est réalisée en fin d'actionnement à l'aide d'un épaulement formé dans le corps de pompe. Ce type de clapet de sortie présente l'inconvénient qu'il doit être à la fois suffisamment rigide pour ne pas se déformer avant la fin de la course de la pompe, et suffisamment déformable pour, en fin d'actionnement, se déformer sans effort exagéré sous l'effet d'une came mécanique. Un équilibre satisfaisant entre ces deux exigences contradictoires est difficile à trouver et le fonctionnement fiable de la pompe peut être altéré par ledit clapet de sortie. En particulier, les moindres différences de dimension ou de rigidité dues aux tolérances de fabrication du clapet de sortie peuvent engendrer un tel dysfonctionnement.To ensure reliable operation of this type of device, the outlet valve of the pump chamber must guarantee that the sealing chamber is completely sealed pump during the entire actuation stroke of the pump, and only open at the very end actuation of said pump to allow the expulsion of the product. In the above-mentioned prior art documents, this outlet valve is produced under the form of an elastically deformable sleeve disposed between the pump body and the rod mobile pump actuation. This valve must be rigid enough not to deform during actuation of the pump under the effect of the pressure created in the pump chamber. Its opening by elastic deformation is carried out at the end actuation using a shoulder formed in the pump body. This type of valve has the disadvantage that it must be both rigid enough not to deform before the end of the pump stroke, and sufficiently deformable for, at the end actuation, deform without exaggerated effort under the effect of a mechanical cam. A a satisfactory balance between these two conflicting requirements is difficult to find and the reliable operation of the pump may be impaired by said outlet valve. In particular, the slightest differences in size or stiffness due to the manufacturing tolerances of the outlet valve can cause such a malfunction.

C'est un but de la présente invention de fournir une pompe à précompression, en particulier une pompe à précompression dans laquelle la distribution du produit est réalisée indépendamment de la force d'actionnement de l'utilisateur, qui ne reproduit pas les inconvénients susmentionnés.It is an object of the present invention to provide a precompression pump, in in particular a precompression pump in which the product is dispensed regardless of the actuation force of the user, who does not reproduce the disadvantages mentioned above.

La présente invention a également pour but de fournir une telle pompe à précompression qui soit simple et facile à fabriquer et à assembler, et fiable dans son utilisation. The present invention also aims to provide such a pump to precompression which is simple and easy to manufacture and assemble, and reliable in its use.

La présente invention a également pour but de fournir une telle pompe à précompression qui assure une distribution totale et reproductible du contenu de la chambre de pompe à chaque actionnement, indépendamment de la force d'actionnement de l'utilisateur.The present invention also aims to provide such a pump to precompression which ensures a total and reproducible distribution of the content of the pump chamber on each actuation, regardless of actuation force of the user.

La présente invention a donc pour objet de distribuer des quantités dosées de produit fluide, comportant un piston solidaire d'une tige d'actionnement et coulissant dans un corps de pompe comprenant une chambre de pompe définie entre un clapet d'entrée et un clapet de sortie, caractérisé en ce que, lors de l'actionnement, ledit clapet de sortie est sollicité vers sa position de fermeture par la pression du produit contenu dans la chambre de pompe, et en ce que, en fin d'actionnement de la pompe, un élément de levier déplace ledit clapet de sortie vers sa position d'ouverture pour permettre l'expulsion du produit contenu dans la chambre de pompe.The object of the present invention is therefore to distribute metered quantities of product fluid, comprising a piston integral with an actuating rod and sliding in a pump body comprising a pump chamber defined between an inlet valve and a outlet valve, characterized in that, upon actuation, said outlet valve is biased towards its closed position by the pressure of the product contained in the chamber pump, and in that, at the end of actuation of the pump, a lever element moves said outlet valve to its open position to allow the expulsion of the product contained in the pump chamber.

Ainsi, contrairement aux dispositifs de l'art antérieur, le clapet de sortie de la pompe de la présente invention n'est pas obligé de résister à la pression du produit pendant toute la course d'actionnement de la pompe, mais est au contraire sollicité vers sa position de fermeture par ledit produit contenu dans la chambre de pompe. Il n'y a donc aucun risque d'ouverture anticipée du clapet de sortie. D'autre part, du fait que le clapet de sortie est sollicité vers sa position de fermeture par la pression du produit contenu dans la chambre de pompe, il n'est pas obligé d'être réalisé avec une rigidité prédéterminée, et son ouverture en fin de course d'actionnement, par un élément de levier est facilement obtenue sans avoir à surmonter une résistance à la déformation inhérente au matériau du clapet de sortie, comme cela est le cas dans les dispositifs de l'état antérieur.Thus, unlike the devices of the prior art, the outlet valve of the pump of the present invention is not required to withstand the pressure of the product during any the pump actuation stroke, but is instead biased towards its position of closure by said product contained in the pump chamber. So there is no risk anticipated opening of the outlet valve. On the other hand, the fact that the outlet valve is biased towards its closed position by the pressure of the product contained in the chamber pump, it is not required to be made with a predetermined rigidity, and its opening at the end of the actuation stroke, by a lever element is easily obtained without having to overcome a resistance to deformation inherent in the material of the outlet valve, as is the case in the devices of the prior state.

Avantageusement, ledit élément de levier coulisse avec ledit piston et ledit clapet de sortie jusqu'à un organe de came solidaire du corps de pompe qui, en fin d'actionnement de la pompe, déforme et/ou déplace l'élément de levier pour ouvrir le clapet de sortie.Advantageously, said lever element slides with said piston and said check valve. outlet to a cam member integral with the pump body which, at the end of actuation of the pump deforms and / or moves the lever element to open the outlet valve.

Avantageusement, ledit organe de came est formé par un épaulement du corps de pompe.Advantageously, said cam member is formed by a shoulder of the body of pump.

Selon une première variante de réalisation avantageuse de la présente invention, ledit élément de levier est réalisé d'une pièce avec ledit clapet de sortie.According to a first advantageous alternative embodiment of the present invention, said lever element is made in one piece with said outlet valve.

Selon une deuxième variante de réalisation avantageuse de la présente invention, une pompe dans laquelle ledit élément de levier est réalisé séparément dudit clapet de sortie.According to a second advantageous alternative embodiment of the present invention, a pump in which said lever element is produced separately from said check valve exit.

De préférence, en position de repos de la pompe, ledit clapet d'entrée est sollicité vers sa position d'ouverture par un ressort et, lors de l'actionnement de la pompe, ledit clapet d'entrée est sollicité vers sa position de fermeture et se déplace en comprimant le ressort sous l'effet de la pression du produit contenu dans la chambre de pompe, ledit ressort étant brusquement libéré lors de l'ouverture de clapet de sortie en fin d'actionnement de la pompe, ramenant ainsi le clapet d'entrée vers sa position de repos et expulsant le produit contenu dans la chambre de pompe indépendamment de la force d'actionnement exercée sur la pompe par l'utilisateur.Preferably, in the pump rest position, said inlet valve is stressed towards its open position by a spring and, when the pump is actuated, said inlet valve is biased towards its closed position and moves by compressing the spring under the effect of the pressure of the product contained in the pump chamber, said spring being suddenly released when opening the outlet valve at the end pump actuation, thereby returning the inlet valve to its rest position and expelling the product contained in the pump chamber regardless of the force actuation exerted on the pump by the user.

Avantageusement, ledit ressort du clapet d'entrée, outre l'expulsion du produit, ramène aussi le piston dans sa position de repos.Advantageously, said spring of the inlet valve, in addition to the expulsion of the product, also returns the piston to its rest position.

Avantageusement, ledit clapet d'entrée est réalisé sous la forme d'un cylindre creux fermé d'un côté par une paroi de fond, le bord de l'extrémité ouverte dudit cylindre creux coopérant, dès le début de l'actionnement de la pompe, avec un cylindre du corps de pompe pour fermer le clapet d'entrée, le ressort s'appuyant d'une part sur la paroi de fond du clapet d'entrée et d'autre part sur une partie du corps de pompe.Advantageously, said inlet valve is produced in the form of a hollow cylinder closed on one side by a bottom wall, the edge of the open end of said hollow cylinder cooperating, from the start of actuation of the pump, with a cylinder of the body pump to close the inlet valve, the spring resting on the one hand on the bottom wall of the inlet valve and on the other hand on a part of the pump body.

La présente invention a également pour objet un dispositif de distribution de produit fluide, caractérisé en ce qu'il comporte une telle pompe à précompression.The present invention also relates to a product distribution device fluid, characterized in that it comprises such a precompression pump.

Les caractéristiques et avantages de la présente invention apparaítront plus clairement à partir de la description détaillée suivante de deux variantes de réalisation avantageuses de l'invention, donnés à titre d'exemples non-limitatifs en regard des dessins joints, sur lesquels :

  • la figure 1 est une vue schématique en section transversale d'une pompe selon une première variante de réalisation avantageuse de la présente invention, en position de repos,
  • la figure 2 est une figure similaire à celle de la figure 1, représentée dans une position en cours d'actionnement de la pompe,
  • la figure 3 est une figure similaire à celle des figures 1 et 2, représentée en position de fin d'actionnement de la pompe,
  • la figure 4 est une vue schématique en section transversale d'une deuxième variante de réalisation avantageuse de la présente invention, représentée en position de repos, et
  • la figure 5 est une vue schématique en section transversale d'une troisième variante de réalisation avantageuse de la présente invention, représentée en position de repos.
The characteristics and advantages of the present invention will appear more clearly from the following detailed description of two advantageous alternative embodiments of the invention, given by way of non-limiting examples with reference to the accompanying drawings, in which:
  • FIG. 1 is a diagrammatic view in cross section of a pump according to a first advantageous alternative embodiment of the present invention, in the rest position,
  • FIG. 2 is a figure similar to that of FIG. 1, shown in a position during actuation of the pump,
  • FIG. 3 is a figure similar to that of FIGS. 1 and 2, shown in the end position of actuation of the pump,
  • FIG. 4 is a schematic cross-sectional view of a second advantageous alternative embodiment of the present invention, shown in the rest position, and
  • Figure 5 is a schematic cross-sectional view of a third advantageous alternative embodiment of the present invention, shown in the rest position.

La présente invention va être décrite en référence à trois modes de réalisation d'une pompe à précompression pour lesquels l'expulsion du produit contenu dans la chambre de pompe est réalisée indépendamment de la force d'actionnement exercée sur la pompe par l'utilisateur. Il est toutefois entendu que la présente invention s'applique à tout type de pompe à précompression, et n'est pas limité par les modes de réalisation représentés sur les dessins.The present invention will be described with reference to three embodiments of a precompression pump for which the expulsion of the product contained in the pump is produced independently of the actuating force exerted on the pump by the user. It is however understood that the present invention applies to any type of precompression pump, and is not limited by the embodiments shown in the drawings.

En référence aux dessins, une pompe à précompression comporte un corps de pompe 3 dans lequel coulisse un piston 1 solidaire d'une tige d'actionnement 2 sur laquelle l'utilisateur appuie pour actionner la pompe. Le piston 1 coulisse dans une chambre de pompe 10 définie dans le corps de pompe 3 entre un clapet d'entrée 11 et un clapet de sortie 12.With reference to the drawings, a precompression pump comprises a pump body 3 in which slides a piston 1 secured to an actuating rod 2 on which the user presses to activate the pump. Piston 1 slides in a pump 10 defined in the pump body 3 between an inlet valve 11 and a valve exit 12.

Selon l'invention, le clapet de sortie 12 est réalisé de telle sorte que lors de l'actionnement de la pompe, il est sollicité vers sa position de fermeture par la pression du produit contenu dans la chambre de pompe 10. C'est seulement en fin d'actionnement de la pompe que ledit clapet de sortie 12 est déplacé vers sa position d'ouverture pour permettre l'expulsion du produit contenu dans la chambre de pompe 10. Cette ouverture est réalisée, selon l'invention, à l'aide d'un élément de levier 30, qui est de préférence disposé entre la tige d'actionnement 2 et ledit clapet de sortie 12. Avantageusement, comme représenté sur les dessins, l'élément de levier 30 est disposé entre le clapet de sortie 12 et la tige d'actionnement 2, l'unité formée de la tige d'actionnement 2, du clapet de sortie 12 et de l'élément de levier 30 coulissant dans le corps de pompe 3, ensemble avec le piston 1, lors de l'actionnement de la pompe. Avantageusement, le corps de pompe 3 comporte un organe de came 4 qui, en fin d'actionnement de la pompe, comme représentée sur la figure 3, déforme et/ou déplace l'élément de levier 30 pour ouvrir le clapet de sortie 12. En particulier, cet organe de came 4 peut être réalisé par un épaulement du corps de pompe.According to the invention, the outlet valve 12 is produced so that when actuation of the pump, it is urged towards its closed position by the pressure of the product contained in pump chamber 10. It is only at the end of actuation of the pump that said outlet valve 12 is moved to its open position for allow the expulsion of the product contained in the pump chamber 10. This opening is made, according to the invention, using a lever element 30, which is preferably disposed between the actuating rod 2 and said outlet valve 12. Advantageously, as shown in the drawings, the lever element 30 is disposed between the outlet valve 12 and the actuating rod 2, the unit formed by the actuating rod 2, the check valve outlet 12 and of the lever element 30 sliding in the pump body 3, together with the piston 1, when the pump is actuated. Advantageously, the pump body 3 comprises a cam member 4 which, at the end of actuation of the pump, as shown in Figure 3, deforms and / or moves the lever member 30 to open the outlet valve 12. In particular, this cam member 4 can be produced by a shoulder of the pump body.

La présente invention s'applique plus particulièrement aux pompes à précompression dans lesquelles l'expulsion du produit contenu dans la chambre de pompe 10 est réalisée indépendamment de la force d'actionnement exercée par l'utilisateur. Pour ce faire, le clapet d'entrée 11 peut coopérer avec un ressort 20 qui, lors de l'actionnement de la pompe, est comprimé par le déplacement du clapet d'entrée 11 sous l'effet de la pression créée dans la chambre de pompe 10. En fin de course d'actionnement de la pompe, lorsque le clapet de sortie 12 est ouvert par l'élément de levier 30, ledit ressort comprimé 20 va être brusquement libéré, de sorte que le produit contenu dans la chambre de pompe 10 est expulsé par l'intermédiaire dudit ressort. De préférence, comme représenté sur les dessins, ledit ressort 20 du clapet d'entrée 11 agit aussi en tant que ressort de rappel de la pompe, ramenant ainsi le piston 1 dans sa position de repos après expulsion du produit. Avantageusement, ledit clapet d'entrée 11 peut être réalisé sous la forme d'un cylindre creux 10 fermé d'un côté par une paroi de fond 111, le bord 113 de l'extrémité ouverte dudit cylindre creux 10 coopérant dès le début de l'actionnement de la pompe avec un cylindre 7 du corps de pompe 3 pour fermer le clapet d'entrée 11. Le ressort 20 s'appuie avantageusement d'une part sur la paroi de fond 111 du clapet d'entrée 11 et d'autre part sur une partie 9 du corps de pompe 3. Bien entendu, l'invention n'est pas limitée à cette réalisation avantageuse du clapet d'entrée.The present invention applies more particularly to precompression pumps in which the product contained in the pump chamber 10 is expelled regardless of the actuating force exerted by the user. To do this, the inlet valve 11 can cooperate with a spring 20 which, when the pump, is compressed by the movement of the inlet valve 11 under the effect of pressure created in the pump chamber 10. At the end of the pump actuation stroke, when the outlet valve 12 is opened by the lever element 30, said compressed spring 20 will be suddenly released, so that the product contained in the pump chamber 10 is expelled through said spring. Preferably, as shown in the drawings, said spring 20 of the inlet valve 11 also acts as a return spring for the pump, thus returning the piston 1 to its rest position after expulsion of the product. Advantageously, said inlet valve 11 can be produced in the form of a cylinder hollow 10 closed on one side by a bottom wall 111, the edge 113 of the open end of said hollow cylinder 10 cooperating from the start of actuation of the pump with a cylinder 7 of the pump body 3 to close the inlet valve 11. The spring 20 is supported advantageously on the one hand on the bottom wall 111 of the inlet valve 11 and on the other hand on a part 9 of the pump body 3. Of course, the invention is not limited to this advantageous construction of the inlet valve.

Le fonctionnement de la pompe est donc le suivant : en position de repos de la pompe, représentée sur la figure 1, le clapet d'entrée 11 est sollicité vers sa position d'ouverture par le ressort 20. Lors de l'actionnement de la pompe, le clapet d'entrée 11 est sollicité vers sa position de fermeture par la pression du produit contenu dans la chambre de pompe 10 et se déplace en comprimant le ressort 20 sous l'effet de ladite pression du produit. Simultanément le clapet de sortie 12 est sollicité vers sa position de fermeture également par la pression du produit contenu dans la chambre de pompe 10, comme représenté sur la figure 2. En fin d'actionnement de la pompe (figure 3), le clapet de sortie 12 est ouvert par l'élément de levier 30 coopérant avec l'épaulement 4 du corps de pompe, ce qui libère brusquement le ressort 20, ce dernier ramenant ainsi le clapet d'entrée 11 vers sa position de départ en expulsant le produit contenu dans la chambre de pompe 10 indépendamment de la force d'actionnement exercée sur la pompe par l'utilisateur. La fiabilité de la pompe sur l'invention est améliorée du fait que le clapet de sortie 12 ne risque pas de s'ouvrir avant la fin de la course d'actionnement de la pompe.The operation of the pump is therefore as follows: in the rest position of the pump, shown in Figure 1, the inlet valve 11 is biased towards its position opening by the spring 20. When the pump is actuated, the inlet valve 11 is biased towards its closed position by the pressure of the product contained in the chamber pump 10 and moves by compressing the spring 20 under the effect of said pressure of the product. Simultaneously the outlet valve 12 is biased towards its closed position also by the pressure of the product contained in the pump chamber 10, as represented in figure 2. At the end of actuation of the pump (figure 3), the outlet valve 12 is opened by the lever element 30 cooperating with the shoulder 4 of the pump body, which suddenly releases the spring 20, the latter thus bringing the inlet valve 11 towards its starting position by expelling the product contained in the pump chamber 10 regardless of the actuating force exerted on the pump by the user. The reliability of the pump on the invention is improved by the fact that the outlet valve 12 does not risk not open before the end of the pump actuation stroke.

En référence aux figures 1 à 3, il est représenté une première variante de réalisation avantageuse du clapet de sortie 12. Dans cette première variante de réalisation, le clapet de sortie 12 et l'élément de levier 30 sont réalisés de manière séparée. Le clapet de sortie 12 est disposé à l'extrémité inférieure de la tige d'actionnement 2 à l'intérieur de la chambre de pompe 10, et l'élément de levier 30 est avantageusement disposé entre la tige d'actionnement 2 et ledit clapet de sortie 12. Ce dernier peut avantageusement comporter une paroi radiale 121, qui maintient l'élément de levier 30 entre l'extrémité inférieure de la tige d'actionnement 2 et ledit clapet 12. Ainsi, comme visible sur la figure 3, lorsque l'élément de levier 30 arrive au niveau de l'épaulement 4 du corps de pompe, la tige d'actionnement 2 qui continue à appuyer sur ledit élément de levier 30 le fait basculer de sorte qu'il coopère avec ladite paroi 121 du clapet de sortie 12 pour déplacer celui-ci axialement par rapport à la tige d'actionnement 2 ouvrant ainsi ledit clapet de sortie et sorte qu'il coopère avec ladite paroi 121 du clapet de sortie 12 pour déplacer celui-ci axialement par rapport à la tige d'actionnement 2 ouvrant ainsi ledit clapet de sortie et libérant le passage pour le produit contenu dans la chambre de pompe 10. Cette construction très simple du clapet de sonie 12 et de l'élément de levier 30 n'implique aucune exigence de haute précision sur les dimensions de ces éléments, la coopération entre la tige d'actionnement 2, l'élément de levier 30 et le clapet de sortie 12 étant mécaniquement réalisée en fin de course d'actionnement de la pompe.Referring to Figures 1 to 3, there is shown a first embodiment advantageous of the outlet valve 12. In this first alternative embodiment, the valve outlet 12 and the lever element 30 are produced separately. The outlet valve 12 is arranged at the lower end of the actuating rod 2 inside the chamber pump 10, and the lever element 30 is advantageously disposed between the rod actuator 2 and said outlet valve 12. The latter may advantageously include a radial wall 121, which holds the lever element 30 between the lower end of the actuating rod 2 and said valve 12. Thus, as visible in FIG. 3, when the lever element 30 arrives at the shoulder 4 of the pump body, the rod actuator 2 which continues to press said lever element 30 causes it to tilt so that it cooperates with said wall 121 of the outlet valve 12 to move the latter axially with respect to the actuating rod 2 thus opening said outlet valve and so that it cooperates with said wall 121 of the outlet valve 12 to move the latter axially with respect to the actuating rod 2 thus opening said outlet valve and freeing the passage for the product contained in the pump chamber 10. This very simple construction of the loudness valve 12 and of the lever element 30 does not imply no requirement for high precision on the dimensions of these elements, cooperation between the actuating rod 2, the lever element 30 and the outlet valve 12 being mechanically performed at the end of the pump actuation stroke.

En référence à la figure 4, il est représenté une deuxième variante de réalisation avantageuse de la présente invention, dans laquelle le clapet de sortie 12 et l'élément de levier 30 sont réalisés d'une seule pièce. Dans ce cas, la partie de levier 30 du clapet de sortie 12 est réalisée par une paroi radiale coopérant par son extrémité radialement externe avec l'épaulement 4 du corps de pompe et pourvu d'un organe d'appui 31 qui coopère avec l'extrémité inférieure de la tige d'actionnement 2. La partie d'élément de levier 30 est reliée au corps central du clapet de sortie 12 de manière déformable de sorte que lorsque le clapet de sortie 12 arrive sur l'épaulement 4 du corps de pompe, l'extrémité radialement externe de ladite partie de levier 30 s'appuie sur ledit épaulement 4, alors que l'extrémité supérieure de l'organe d'appui 31 coopère avec la tige d'actionnement 2. Ainsi, en fin de course d'actionnement de la pompe, la partie centrale du clapet de sortie 12 est déplacée axialement par rapport à la tige d'actionnement 2 pour ouvrir le passage permettant l'expulsion du produit contenu dans la chambre de pompe. La fabrication et l'assemblage sont également très simples dans cette deuxième variante de réalisation, et la fiabilité de fonctionnement de la pompe est également assurée.Referring to Figure 4, there is shown a second alternative embodiment advantageous of the present invention, in which the outlet valve 12 and the element of lever 30 are made in one piece. In this case, the lever portion 30 of the check valve outlet 12 is produced by a radial wall cooperating at its radially external end with the shoulder 4 of the pump body and provided with a support member 31 which cooperates with the lower end of the actuating rod 2. The lever element part 30 is connected to the central body of the outlet valve 12 in a deformable manner so that when the valve outlet 12 arrives on the shoulder 4 of the pump body, the radially outer end of said lever part 30 rests on said shoulder 4, while the upper end of the support member 31 cooperates with the actuating rod 2. Thus, at the end of the race pump actuation, the central part of the outlet valve 12 is moved axially relative to the actuating rod 2 to open the passage allowing the expulsion of the product contained in the pump chamber. Manufacturing and assembly are also very simple in this second variant embodiment, and the reliability of pump operation is also ensured.

En référence à la figure 5, il est représenté une autre variante de réalisation, dans laquelle le clapet d'entrée 11 incorpore une bille 211. Cette bille 211 est sollicitée pendant l'actionnement de la pompe dans sa position de fermeture et se soulève de son siège de clapet pour permettre le remplissage de la chambre de dosage 10, lorsque la pompe retourne vers sa position de repos. Dans cette variante, le remplissage de la chambre de pompe est réalisé de manière progressive pendant le retour du piston vers sa position de repos. La figure 5 montre ainsi que le clapet de sortie 12 peut s'étendre de manière quelconque dans la tige d'actionnement.With reference to FIG. 5, another alternative embodiment is shown, in which the inlet valve 11 incorporates a ball 211. This ball 211 is stressed during actuation of the pump in its closed position and lifts from its seat valve to allow filling of the metering chamber 10, when the pump returns to its rest position. In this variant, the filling of the pump is carried out gradually during the return of the piston to its position of rest. FIG. 5 thus shows that the outlet valve 12 can extend so any in the actuating rod.

Bien entendu, l'invention n'est pas limitée aux trois exemples de réalisation du clapet de sortie représentées sur les dessins, et la portée de l'invention est au contraire définie par les revendications annexées.Of course, the invention is not limited to the three exemplary embodiments of the valve. shown in the drawings, and the scope of the invention is on the contrary defined by the appended claims.

Claims (9)

  1. A pre-compression pump for dispensing metered quantities of fluid, said pump including a piston (1) secured to or integral with an actuating rod (2) and slidably-received in a pump body (3) including a pump chamber (10) defined between an inlet valve (11) and, an outlet valve (12), said pre-compression pump being characterized in that, when the pump is actuated, said outlet valve (12) is urged towards its closed position by the pressure of the fluid contained in the pump chamber (10), and in that, at the end of the actuating stroke of the pump, a lever element (30) moves said outlet valve (12) towards its open position to enable the fluid contained in the pump chamber (10) to be expelled.
  2. A pump according to claim 1, in which said lever element (30) is mounted to slide with said piston (1) and said outlet valve (12) to reach a cam member (4) which is secured to or integral with the pump body (3) and which, at the end of the actuating stroke of the pump, deforms and/or displaces the lever element (30) so as to open the outlet valve (12).
  3. A pump according to claim 2, in which said cam member is formed by a shoulder in the pump body (3).
  4. A pump according to any preceding claim, in which said lever element (30) is made integrally with said outlet valve (12).
  5. A pump according to any one of claims 1 to 3, in which said lever element (30) is made separately from said outlet valve (12).
  6. A pump according to any preceding claim, in which, when the pump is in the rest position, said inlet valve (11) is urged towards its open position by a spring (20), and, when the pump is actuated, said inlet valve (11) is urged towards its closed position and moves by compressing the spring (20) under the effect of the pressure of the fluid contained in the pump chamber (10), said spring (20) being released suddenly when the outlet valve (12) opens at the end of the actuating stroke of the pump, thereby bringing the inlet valve (11) back towards its rest position and expelling the fluid contained in the pump chamber (10) independently of the actuating force exerted on the pump by the user.
  7. A pump according to claim 6, in which, in addition to expelling the fluid, said spring (20) of the inlet valve (11) also returns the piston (1) to its rest position.
  8. A pump according to claim 6 or 7, in which said inlet valve (11) is made in the form of a hollow cylinder (10) closed at one end by an end wall (111), the edge (113) of the open end of said hollow cylinder (10) co-operating, as of the beginning of the actuating stroke of the pump, with a cylinder (7) of the pump body (3) to close the inlet valve (11), the spring (20) bearing at one end against the end wall (111) of the inlet valve (11) and at its other end against a portion (9) of the pump body (3).
  9. A fluid dispenser device, characterized in that it includes a pre-compression pump according to any preceding claim.
EP20000951630 1999-06-30 2000-06-21 Improved pre-compression spray pump Expired - Lifetime EP1194247B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9908361A FR2795779B1 (en) 1999-06-30 1999-06-30 IMPROVED PRE-PRESSURE PUMP
FR9908361 1999-06-30
PCT/FR2000/001717 WO2001002100A1 (en) 1999-06-30 2000-06-21 Improved pre-compression spray pump

Publications (2)

Publication Number Publication Date
EP1194247A1 EP1194247A1 (en) 2002-04-10
EP1194247B1 true EP1194247B1 (en) 2003-08-27

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EP20000951630 Expired - Lifetime EP1194247B1 (en) 1999-06-30 2000-06-21 Improved pre-compression spray pump

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US (1) US6446841B1 (en)
EP (1) EP1194247B1 (en)
JP (1) JP2003503633A (en)
CN (1) CN1128683C (en)
DE (1) DE60004847T2 (en)
FR (1) FR2795779B1 (en)
WO (1) WO2001002100A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6554160B2 (en) * 2001-03-22 2003-04-29 Valois S.A. Dispenser member such as a pump or a valve
US7255248B2 (en) * 2002-08-29 2007-08-14 Emsar, Inc. Plug style pump
US7467908B2 (en) * 2003-12-24 2008-12-23 Lucas Publications, Inc. Fluid dispenser assembly
ITMI20041249A1 (en) * 2004-06-22 2004-09-22 Lumson Spa MANUALLY OPERATED PUMP FOR DISPENSING CREAMY SUBSTANCES
US8668401B2 (en) 2010-04-05 2014-03-11 Frank Francavilla Mascara dispensing device
FR3002293B1 (en) * 2013-02-15 2015-04-10 Aptar France Sas IMPROVED PRECOMPRESSION PUMP.
CN105923253B (en) * 2016-05-20 2017-10-03 浙江正庄实业有限公司 Push type foam pump and its fuel injection quantity control method
FR3095968B1 (en) 2019-05-14 2021-10-01 Aptar France Sas Fluid dispenser device
FR3096089B1 (en) 2019-05-14 2022-08-05 Aptar France Sas Method of assembling a high pressure pre-compression pump
FR3096090B1 (en) 2019-05-14 2022-10-28 Aptar France Sas High pressure pre-compression pump
FR3100724B1 (en) 2019-09-17 2023-03-24 Aptar France Sas High pressure pre-compression pump

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US4693675A (en) 1986-01-16 1987-09-15 The Pharmasol Corporation Non-throttling discharge pump
GB8625491D0 (en) 1986-10-24 1986-11-26 Bespak Plc Discharge pump assembly
FR2656901B1 (en) * 1990-01-08 1993-02-19 Step Soc Tech Pulverisation IMPROVEMENT OF A PREPRESSURE DOSING PUMP TO IMPROVE THE PRIMING AND GUARANTEE ITS EASE OF ASSEMBLY.
GB2245936A (en) * 1990-05-01 1992-01-15 Bespak Plc Dispencing device
FR2714119B1 (en) * 1993-12-22 1996-02-23 Step Manual adjustable dose spray pump.
US5626264A (en) * 1996-08-09 1997-05-06 Calmar Inc. Precompression pump sprayer
US6170713B1 (en) * 1998-10-28 2001-01-09 Emson, Inc. Double spring precompression pump with priming feature
US6340102B1 (en) * 1999-02-19 2002-01-22 Cheng-Yuan Su Sealing valve structure for liquid sprayers

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DE60004847T2 (en) 2004-07-08
JP2003503633A (en) 2003-01-28
CN1128683C (en) 2003-11-26
DE60004847D1 (en) 2003-10-02
WO2001002100A1 (en) 2001-01-11
FR2795779A1 (en) 2001-01-05
US6446841B1 (en) 2002-09-10
EP1194247A1 (en) 2002-04-10
CN1341042A (en) 2002-03-20
FR2795779B1 (en) 2001-09-14

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