EP1268083B1 - Dispensing member with outlet valve formed by a differential piston - Google Patents

Dispensing member with outlet valve formed by a differential piston Download PDF

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Publication number
EP1268083B1
EP1268083B1 EP01907797A EP01907797A EP1268083B1 EP 1268083 B1 EP1268083 B1 EP 1268083B1 EP 01907797 A EP01907797 A EP 01907797A EP 01907797 A EP01907797 A EP 01907797A EP 1268083 B1 EP1268083 B1 EP 1268083B1
Authority
EP
European Patent Office
Prior art keywords
piston
dispensing member
differential piston
chamber
member according
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
EP01907797A
Other languages
German (de)
French (fr)
Other versions
EP1268083A1 (en
Inventor
Firmin Garcia
stéphane Beranger
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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Filing date
Publication date
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Publication of EP1268083A1 publication Critical patent/EP1268083A1/en
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Publication of EP1268083B1 publication Critical patent/EP1268083B1/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
    • B05B11/1038—Pressure accumulation pumps, i.e. pumps comprising a pressure accumulation chamber
    • B05B11/104—Pressure accumulation pumps, i.e. pumps comprising a pressure accumulation chamber the outlet valve being opened by pressure after a defined accumulation stroke
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1001—Piston pumps
    • B05B11/1015—Piston pumps actuated without substantial movement of the nozzle in the direction of the pressure 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
    • B05B11/1021—Piston pumps having an outlet valve which is a gate valve
    • B05B11/1022—Piston pumps having an outlet valve which is a gate valve actuated by pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1073—Springs
    • B05B11/1074—Springs located outside pump chambers

Definitions

  • the present invention relates to a fluid dispenser member for mounting on the neck of a container.
  • this dispensing member comprises a body defining a chamber, an actuating rod provided with a pusher, a piston mounted on the actuating rod and sliding in a sealed manner in the chamber, an inlet valve and an outlet valve. Pressing the pusher moves the piston which reduces the volume of the pump chamber and thus puts the fluid it contains under pressure. The inlet valve closes and the outlet valve opens to expel the fluid product from the chamber to the outside.
  • the outlet valve is located inside the pump chamber and slidably mounted on the actuating rod.
  • the piston is formed by a sleeve defining on its outer periphery a sealing lip for sealingly sliding against the inner wall of the body.
  • the sleeve slides on the actuating rod so as to selectively mask and unmask one or more outlets communicating with an inner conduit formed within the actuating rod.
  • the outlet orifice is located on the pusher so that it is movable with the latter.
  • This type of distribution member is described in particular in WO 95/29016.
  • the piston is biased by a spring which bears on the one hand on the piston sleeve, and on the other hand against a stop collar formed by an actuating rod.
  • said differential piston slides in the body.
  • the body defines a cylindrical section in which the differential piston slides, said cylindrical section being provided with a passage hole selectively closable by said differential piston.
  • the dispensing member will be fixed spray, that is to say provided with a dispensing orifice that does not move with the rod and the pusher.
  • a ferrule is engaged in the body to define the rest position of the piston, said differential piston being biased by the spring against said ferrule.
  • the differential piston slides sealingly on a cylindrical sleeve formed by the ferrule.
  • the shell here fulfills a dual function, namely that of stop for the piston in the rest position and that of stop for the differential piston also in the rest position.
  • the cylindrical sleeve of the ferrule also serves as guide means for the actuating rod to keep it in line.
  • the differential piston is disposed between the pusher and the ferrule.
  • the spring is located outside the chamber.
  • the differential piston is located outside the chamber.
  • the fluid dispenser member which is here a precompression pump is shown mounted on a neck of a container.
  • a fixing ring 3 which cooperates with the inner wall of the neck 10, for example by snapping.
  • the fixing ring 3 can also form a housing in which a nozzle 8 is engaged.
  • the pump will then be of the fixed spray type.
  • a trim ring 9 for example metal.
  • the pump also comprises a body 2 engaged inside the fixing ring 3.
  • a piston 4 is slidably mounted inside a barrel 20 defined by the body 2.
  • the piston 4 is mounted at the end of an actuating rod 5 which terminates at its upper end by a pusher 51 on which is pressed to actuate the pump.
  • the piston 4 and the body 2 together define a pump chamber 43 which communicates with the container through an inlet 230.
  • the pump chamber is connected to the nozzle 8 by a discharge channel 23 which is formed between the body 2 and the fixing ring 3.
  • a ferrule 6 is further engaged in the pump body 2: this ferrule 6 comprises a sleeve 61 which forms at its lower end an abutment surface for the piston 4 in the rest position.
  • the sleeve 6 forms a sleeve 62 through which the actuating rod 5 extends. This sleeve 62 consequently constitutes guiding means for keeping the actuating rod 5 in the axis.
  • the ferrule also defines its bearing surface 64.
  • a differential piston 7 is provided to serve as a movable outlet valve member.
  • the differential piston 7 is biased by a spring 52 against the bearing surface 64 of the shell 6.
  • the spring 52 is supported on the one hand against the differential piston 7 and on the other hand against the underside of the pusher 51.
  • differential piston is formed with a central sleeve 71 for sealingly sliding on the sleeve 62 formed by the collar 6.
  • the differential piston is formed with an outer sealing lip 72 in sealing contact with the 2. More precisely, the body 2 forms at its upper end a cylindrical section 26 in which the differential piston 7 slides. This cylindrical section 26 is pierced with a through hole 25 which communicates with an outlet duct 35 formed by the 3.
  • the product can flow through the nozzle 8, advantageously passing through channels and a swirling chamber. Since the sealing lip 72 of the differential piston 7 slides against the inner wall of the cylindrical section 26, it selectively masks and unmasks the through hole 25. Therefore, the fluid product from the pump chamber 43 through the discharge channel 23 can flow through the through hole 25 when the differential piston 7 unmasks the hole 25. In other words, the product at the outlet of the discharge channel 23 enters a valve chamber of outlet 74 which increases in volume when the pressure inside the pump chamber 43 is sufficient to raise the differential piston 7 on the sleeve 62 of the ferrule 6 against the spring 52. It should therefore also be noted that the spring 52 serves as both a return piston and precompression.
  • the internal diameter of the cylindrical section 26 is different from that of the barrel 20 of the body 2 in which the piston 4 slides.
  • the diameter of the cylindrical section 26 is greater than that of the so that a reduction effect is created, since the differential piston 7 has a shorter stroke than that of the piston 4. Indeed, it suffices for the differential piston 7 to move less than a millimeter to unmask the piston. through hole 25, while the piston moves about a centimeter.
  • the single return spring and precompression 52 is located outside the chamber 43, that is to say out of contact with the fluid to be dispensed.
  • the ferrule 6 fills in this pump several functions at the same time, namely that of high dead point for the piston 4, that of stop for the differential piston 7, that of sliding wall with its sealing sleeve 62 for the differential piston 7, that of guiding means with its sleeve 62 for the actuating rod 5.
  • the ferrule 6 performs an additional function of locking with its sleeve 61 by blocking the snap of the fixing ring 3 to the interior of the neck 10 of the container 1.
  • Such a ferrule 6 may for example be implemented with a differential piston having other characteristics.
  • FIGS. 2a, 2b and 2c explain a complete operating cycle of such a pump.
  • the piston 4 In the position shown in FIG. 2a, the piston 4 is in its high position in abutment against the shell 6. No pressure is exerted on the pusher 51 and the spring 52 is in its most relaxed state with the differential piston 7 biased against the shell 6. The through hole 25 is then closed by the outer peripheral lip 72 of the differential piston 7.
  • the pressurized product has the effect of displacing the piston differential against the spring 52 until its outer peripheral lip 72 unmasks the through hole 25, as shown in Figure 2b.
  • the fluid product can then escape through the passage 25 and the nozzle.
  • the outlet valve remains open as long as the pressure is sufficient to hold the lip 72 above the through hole 25.

Landscapes

  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Closures For Containers (AREA)
  • Reciprocating Pumps (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

The invention concerns a fluid dispensing member comprising: a body (2) defining a chamber (43); an actuating rod (5) provided with a push element (51); a piston (4) mounted on the actuating rod (5) and sliding sealed in the chamber; an inlet valve, and an outlet valve (7). The invention is characterised in that the outlet valve comprises a differential piston (7) mobile under the action of pressure exerted on the fluid product by the piston (4) countering the action of a spring (52) supported on the differential piston and on the push-button.

Description

La présente invention concerne un organe de distribution de produit fluide destiné à être monté sur le col d'un récipient. De manière classique, cet organe de distribution comprend un corps définissant une chambre, une tige d'actionnement pourvue d'un poussoir, un piston monté sur la tige d'actionnement et coulissant de manière étanche dans la chambre, un clapet d'entrée et un clapet de sortie. En appuyant sur le poussoir, on déplace le piston qui réduit le volume de la chambre de la pompe et met ainsi le produit fluide qu'elle contient sous pression. Le clapet d'entrée se ferme et le clapet de sortie s'ouvre de manière à refouler le produit fluide de la chambre vers l'extérieur.The present invention relates to a fluid dispenser member for mounting on the neck of a container. In a conventional manner, this dispensing member comprises a body defining a chamber, an actuating rod provided with a pusher, a piston mounted on the actuating rod and sliding in a sealed manner in the chamber, an inlet valve and an outlet valve. Pressing the pusher moves the piston which reduces the volume of the pump chamber and thus puts the fluid it contains under pressure. The inlet valve closes and the outlet valve opens to expel the fluid product from the chamber to the outside.

Il existe déjà dans l'art antérieur de nombreux organes de distribution tels que des pompes, dans lesquelles le clapet de sortie est situé à l'intérieur de la chambre de pompe et monté coulissant sur la tige d'actionnement. Dans ce cas, le piston est formé par une manchette définissant sur sa périphérie extérieure une lèvre d'étanchéité destinée à coulisser de manière étanche contre la paroi interne du corps. En outre, la manchette coulisse sur la tige d'actionnement de manière à masquer et démasquer sélectivement un ou plusieurs orifices de sortie communiquant avec un conduit interne formé à l'intérieur de la tige d'actionnement. Bien évidemment, dans ce type d'organe de distribution, l'orifice de sortie est situé sur le poussoir de sorte qu'il est mobile avec ce dernier. Ce genre d'organe de distribution est notamment décrit dans le document WO 95/29016. Le piston est sollicité par un ressort qui prend appui d'une part sur la manchette de piston, et d'autre part contre une collerette de butée formé par une tige d'actionnement.Numerous dispensing members such as pumps already exist in the prior art, in which the outlet valve is located inside the pump chamber and slidably mounted on the actuating rod. In this case, the piston is formed by a sleeve defining on its outer periphery a sealing lip for sealingly sliding against the inner wall of the body. In addition, the sleeve slides on the actuating rod so as to selectively mask and unmask one or more outlets communicating with an inner conduit formed within the actuating rod. Of course, in this type of dispensing member, the outlet orifice is located on the pusher so that it is movable with the latter. This type of distribution member is described in particular in WO 95/29016. The piston is biased by a spring which bears on the one hand on the piston sleeve, and on the other hand against a stop collar formed by an actuating rod.

Ce genre de pompe présente cependant le désavantage que le clapet de sortie est directement lié au piston. Il n'est donc pas possible de créer ou de profiter d'une démultiplication qui permettrait soit de durcir, soit d'adoucir le fonctionnement de la pompe, et notamment l'ouverture de son clapet de sortie.This kind of pump, however, has the disadvantage that the outlet valve is directly connected to the piston. It is therefore not possible to create or benefit from a gear that would either harden or soften the operation of the pump, including the opening of its outlet valve.

Pour ce faire, la présente invention propose un organe de distribution de produit fluide comprenant :

  • un corps définissant une chambre,
  • une tige d'actionnement pourvue d'un poussoir,
  • un piston monté sur la tige d'actionnement et coulissant de manière étanche dans la chambre,
  • un clapet d'entrée, et
  • un clapet de sortie,
le clapet de sortie comprenant un piston différentiel déplaçable sous l'action de la pression exercée sur le produit fluide par le piston contre l'action d'un ressort qui prend appui d'une part sur le piston différentiel et d'autre part sur le poussoir. Le piston et le piston différentiel sont ainsi totalement dissociés, de sorte qu'ils ont chacun un déplacement propre. En l'occurrence, ils peuvent avoir des courses ainsi que des diamètres différents. Par exemple, le piston différentiel peut avoir un diamètre plus important que le piston qui coulisse dans la chambre.To do this, the present invention provides a fluid dispenser member comprising:
  • a body defining a room,
  • an actuating rod provided with a pusher,
  • a piston mounted on the actuating rod and sliding in a sealed manner in the chamber,
  • an inlet flap, and
  • a check valve,
the outlet valve comprising a differential piston displaceable under the action of the pressure exerted on the fluid by the piston against the action of a spring which bears on the one hand on the differential piston and on the other hand on the button. The piston and the differential piston are thus completely dissociated, so that they each have their own displacement. In this case, they can have different races and diameters. For example, the differential piston may have a larger diameter than the piston which slides in the chamber.

Selon une caractéristique de l'invention, ledit piston différentiel coulisse dans le corps. Avantageusement, le corps définit une section cylindrique dans laquelle le piston différentiel coulisse, ladite section cylindrique étant pourvue d'un trou de passage sélectivement obturable par ledit piston différentiel. Dans ce cas, l'organe de distribution sera à spray fixe, c'est-à-dire pourvu d'un orifice de distribution qui ne se déplace pas avec la tige et le poussoir.According to one characteristic of the invention, said differential piston slides in the body. Advantageously, the body defines a cylindrical section in which the differential piston slides, said cylindrical section being provided with a passage hole selectively closable by said differential piston. In this case, the dispensing member will be fixed spray, that is to say provided with a dispensing orifice that does not move with the rod and the pusher.

Selon une forme de réalisation pratique, une virole est engagée dans le corps pour définir la position de repos du piston, ledit piston différentiel étant sollicité par le ressort contre ladite virole. Avantageusement, le piston différentiel coulisse de manière étanche sur une manchette cylindrique formée par la virole. La virole remplit ici une double fonction, à savoir celle de butée pour le piston en position de repos et celle de butée pour le piston différentiel également en position de repos. De plus, la manchette cylindrique de la virole sert également de moyen de guidage pour la tige d'actionnement afin de la garder dans l'axe.According to a practical embodiment, a ferrule is engaged in the body to define the rest position of the piston, said differential piston being biased by the spring against said ferrule. Advantageously, the differential piston slides sealingly on a cylindrical sleeve formed by the ferrule. The shell here fulfills a dual function, namely that of stop for the piston in the rest position and that of stop for the differential piston also in the rest position. In addition, the cylindrical sleeve of the ferrule also serves as guide means for the actuating rod to keep it in line.

Selon un mode de réalisation, le piston différentiel est disposé entre le poussoir et la virole. En outre, le ressort est situé à l'extérieur de la chambre. D'autre part, le piston différentiel est situé à l'extérieur de la chambre.According to one embodiment, the differential piston is disposed between the pusher and the ferrule. In addition, the spring is located outside the chamber. On the other hand, the differential piston is located outside the chamber.

L'invention sera maintenant plus amplement décrite en référence aux dessins joints donnant à titre d'exemple non limitatif un mode de réalisation de l'invention.The invention will now be more fully described with reference to the accompanying drawings giving by way of non-limiting example an embodiment of the invention.

Sur les dessins :

  • la figure 1 est une vue en section transversale verticale à travers un organe de distribution monté sur un col de récipient, ledit organe étant en position de repos,
  • les figures 22a, 2b et 2c sont des vues en section transversale servant à illustrer le fonctionnement de l'organe de distribution de la figure 1.
On the drawings:
  • FIG. 1 is a view in vertical cross section through a dispensing member mounted on a container neck, said member being in the rest position,
  • Figures 22a, 2b and 2c are cross-sectional views for illustrating the operation of the dispensing member of Figure 1.

On se référera tout d'abord à la figure 1 pour décrire la structure d'un organe de distribution selon une forme préférée de l'invention. L'organe de distribution de produit fluide qui est ici une pompe à précompression est représenté monté sur un col 10 d'un récipient. Pour sa fixation, on utilise une bague de fixation 3 qui coopère avec la paroi interne du col 10, par exemple par encliquetage. La bague de fixation 3 peut également former un logement dans lequel est engagé un gicleur 8. La pompe sera alors du type à spray fixe.Referring first to Figure 1 to describe the structure of a dispensing member according to a preferred form of the invention. The fluid dispenser member which is here a precompression pump is shown mounted on a neck of a container. For fixing, using a fixing ring 3 which cooperates with the inner wall of the neck 10, for example by snapping. The fixing ring 3 can also form a housing in which a nozzle 8 is engaged. The pump will then be of the fixed spray type.

Pour masquer la bague de fixation 3, ainsi, que le col 10, il est prévu d'une frette d'habillage 9 par exemple en métal.To hide the fixing ring 3, as the collar 10, there is provided a trim ring 9 for example metal.

La pompe comprend également un corps 2 engagé à l'intérieur de la bague de fixation 3.The pump also comprises a body 2 engaged inside the fixing ring 3.

Un piston 4 est monté coulissant à l'intérieur d'un fût 20 défini par le corps 2. Le piston 4 est monté à l'extrémité d'une tige d'actionnement 5 qui se termine à son extrémité supérieure par un poussoir 51 sur lequel on appuie pour actionner la pompe. Le piston 4 et le corps 2 définissent ensemble une chambre de pompe 43 qui communique avec le récipient par une entrée 230. D'autre part, la chambre de pompe est reliée au gicleur 8 par un canal de refoulement 23 qui est formé entre le corps 2 et la bague de fixation 3.A piston 4 is slidably mounted inside a barrel 20 defined by the body 2. The piston 4 is mounted at the end of an actuating rod 5 which terminates at its upper end by a pusher 51 on which is pressed to actuate the pump. The piston 4 and the body 2 together define a pump chamber 43 which communicates with the container through an inlet 230. On the other hand, the pump chamber is connected to the nozzle 8 by a discharge channel 23 which is formed between the body 2 and the fixing ring 3.

Une virole 6 est d'autre part engagée dans le corps de pompe 2 : cette virole 6 comprend une douille 61 qui forme à son extrémité inférieure une surface de butée pour le piston 4 en position de repos. D'autre part, la douille 6 forme une manchette 62 au travers de laquelle s'étend la tige d'actionnement 5. Cette manchette 62 constitue par conséquent des moyens de guidage pour maintenir la tige d'actionnement 5 dans l'axe. La virole définit également sa surface d'appui 64.A ferrule 6 is further engaged in the pump body 2: this ferrule 6 comprises a sleeve 61 which forms at its lower end an abutment surface for the piston 4 in the rest position. On the other hand, the sleeve 6 forms a sleeve 62 through which the actuating rod 5 extends. This sleeve 62 consequently constitutes guiding means for keeping the actuating rod 5 in the axis. The ferrule also defines its bearing surface 64.

Selon l'invention, un piston différentiel 7 est prévu pour servir d'organe de clapet mobile de sortie. Le piston différentiel 7 est sollicité par un ressort 52 contre la surface d'appui 64 de la virole 6. Le ressort 52 prend appui d'une part contre le piston différentiel 7 et d'autre part contre la face inférieure du poussoir 51. Le piston différentiel est formé avec un manchon central 71 destiné à coulisser de manière étanche sur la manchette 62 formée par la virole 6. D'autre part, le piston différentiel est formé avec une lèvre d'étanchéité extérieure 72 en contact de coulissement étanche avec le corps 2. Plus précisément, le corps 2 forme à son extrémité supérieure une section cylindrique 26 dans laquelle coulisse le piston différentiel 7. Cette section cylindrique 26 est percée d'un trou de passage 25 qui communique avec un conduit de sortie 35 formé par la bague de fixation 3. De là, le produit peut s'écouler à travers le gicleur 8 en passant avantageusement à travers des canaux et une chambre de tourbillonnement. Etant donné que la lèvre d'étanchéité 72 du piston différentiel 7 coulisse contre la paroi interne de la section cylindrique 26, elle masque et démasque sélectivement le trou de passage 25. Par conséquent, le produit fluide en provenance de la chambre de pompe 43 à travers le canal de refoulement 23 peut s'écouler à travers le trou de passage 25 lorsque le piston différentiel 7 démasque le trou 25. En d'autres termes, le produit à la sortie du canal de refoulement 23 pénètre dans une chambre de clapet de sortie 74 qui augmente de volume lorsque la pression à l'intérieur de la chambre de pompe 43 est suffisante pour faire remonter le piston différentiel 7 sur la manchette 62 de la virole 6 à l'encontre du ressort 52. Il faut par conséquent également noter que le ressort 52 sert à la fois de piston de rappel et de précompression.According to the invention, a differential piston 7 is provided to serve as a movable outlet valve member. The differential piston 7 is biased by a spring 52 against the bearing surface 64 of the shell 6. The spring 52 is supported on the one hand against the differential piston 7 and on the other hand against the underside of the pusher 51. differential piston is formed with a central sleeve 71 for sealingly sliding on the sleeve 62 formed by the collar 6. On the other hand, the differential piston is formed with an outer sealing lip 72 in sealing contact with the 2. More precisely, the body 2 forms at its upper end a cylindrical section 26 in which the differential piston 7 slides. This cylindrical section 26 is pierced with a through hole 25 which communicates with an outlet duct 35 formed by the 3. From there, the product can flow through the nozzle 8, advantageously passing through channels and a swirling chamber. Since the sealing lip 72 of the differential piston 7 slides against the inner wall of the cylindrical section 26, it selectively masks and unmasks the through hole 25. Therefore, the fluid product from the pump chamber 43 through the discharge channel 23 can flow through the through hole 25 when the differential piston 7 unmasks the hole 25. In other words, the product at the outlet of the discharge channel 23 enters a valve chamber of outlet 74 which increases in volume when the pressure inside the pump chamber 43 is sufficient to raise the differential piston 7 on the sleeve 62 of the ferrule 6 against the spring 52. It should therefore also be noted that the spring 52 serves as both a return piston and precompression.

Selon l'invention, le diamètre interne de la section cylindrique 26 est différent de celui du fût 20 du corps 2 dans lequel coulisse le piston 4. Dans l'exemple de réalisation représenté, le diamètre de la section cylindrique 26 est supérieur à celui du fût de sorte qu'il est créé un effet de démultiplication, étant donné que le piston différentiel 7 a une course inférieure à celle du piston 4. En effet, il suffit au piston différentiel 7 de se déplacer de moins de un millimètre pour démasquer le trou de passage 25, alors que le piston se déplace de près de un centimètre.According to the invention, the internal diameter of the cylindrical section 26 is different from that of the barrel 20 of the body 2 in which the piston 4 slides. In the exemplary embodiment shown, the diameter of the cylindrical section 26 is greater than that of the so that a reduction effect is created, since the differential piston 7 has a shorter stroke than that of the piston 4. Indeed, it suffices for the differential piston 7 to move less than a millimeter to unmask the piston. through hole 25, while the piston moves about a centimeter.

Il faut également remarquer que le ressort unique de rappel et de précompression 52 est situé à l'extérieur de la chambre 43, c'est-à-dire hors de contact du produit fluide à distribuer.It should also be noted that the single return spring and precompression 52 is located outside the chamber 43, that is to say out of contact with the fluid to be dispensed.

Il faut également remarquer que la virole 6 remplit dans cette pompe plusieurs fonctions à la fois, à savoir celle de point mort haut pour le piston 4, celle de butée pour le piston différentiel 7, celle de paroi de coulissement étanche avec sa manchette 62 pour le piston différentiel 7, celle de moyen de guidage avec sa manchette 62 pour la tige d'actionnement 5. En outre, la virole 6 remplit une fonction supplémentaire de blocage avec sa douille 61 en bloquant l'encliquetage de la bague de fixation 3 à l'intérieur du col 10 du récipient 1. Une telle virole 6 peut par exemple être mise en oeuvre avec un piston différentiel ayant d'autres caractéristiques.It should also be noted that the ferrule 6 fills in this pump several functions at the same time, namely that of high dead point for the piston 4, that of stop for the differential piston 7, that of sliding wall with its sealing sleeve 62 for the differential piston 7, that of guiding means with its sleeve 62 for the actuating rod 5. In addition, the ferrule 6 performs an additional function of locking with its sleeve 61 by blocking the snap of the fixing ring 3 to the interior of the neck 10 of the container 1. Such a ferrule 6 may for example be implemented with a differential piston having other characteristics.

Il sera maintenant fait référence aux figures 2a, 2b et 2c pour expliquer un cycle d'actionnement complet d'une telle pompe. Dans la position représentée sur la figure 2a, le piston 4 est dans sa position haute en butée contre la virole 6. Aucune pression n'est exercée sur le poussoir 51 et le ressort 52 est dans son état le plus détendu avec le piston différentiel 7 sollicité contre la virole 6. Le trou de passage 25 est alors obturé par la lèvre périphérique extérieure 72 du piston différentiel 7. En exerçant une pression sur le poussoir 51, le piston 4 descend dans la chambre de pompe 43 et le produit fluide stocké à l'intérieur est refoulé par le canal de refoulement 23 jusque dans la chambre de clapet de sortie 74. Le produit sous pression a pour effet de déplacer le piston différentiel à l'encontre du ressort 52 jusqu'à ce que sa lèvre périphérique extérieure 72 démasque le trou de passage 25, comme représenté sur la figure 2b. Le produit fluide peut alors s'échapper à travers le passage 25 et le gicleur. Le clapet de sortie reste ouvert tant que la pression est suffisante pour maintenir la lèvre 72 au-dessus du trou de passage 25. Lorsque le poussoir 51 est complètement enfoncé, comme représenté sur la figure 3, il n'y a pratiquement plus de produit à l'intérieur de la chambre 43 et la pression est complètement tombée de sorte que le ressort 52 peut ramener le piston différentiel 7 dans sa position de repos en butée contre la virole 6. Le trou de passage 25 est alors à nouveau masqué par la lèvre 72. En relâchant la pression sur le poussoir 51, le piston remonte sous l'action de rappel du ressort 52 alors que le piston différentiel reste complètement immobile, plaqué sur la virole 6. La remontée du piston 4 a pour effet d'aspirer du produit à l'intérieur de la chambre en provenance du récipient. Le cycle de fonctionnement est alors terminé.Reference will now be made to FIGS. 2a, 2b and 2c to explain a complete operating cycle of such a pump. In the position shown in FIG. 2a, the piston 4 is in its high position in abutment against the shell 6. No pressure is exerted on the pusher 51 and the spring 52 is in its most relaxed state with the differential piston 7 biased against the shell 6. The through hole 25 is then closed by the outer peripheral lip 72 of the differential piston 7. By exerting pressure on the pusher 51, the piston 4 descends into the pump chamber 43 and the fluid product stored inside is discharged through the discharge channel 23 into the outlet valve chamber 74. The pressurized product has the effect of displacing the piston differential against the spring 52 until its outer peripheral lip 72 unmasks the through hole 25, as shown in Figure 2b. The fluid product can then escape through the passage 25 and the nozzle. The outlet valve remains open as long as the pressure is sufficient to hold the lip 72 above the through hole 25. When the pusher 51 is fully depressed, as shown in FIG. 3, there is practically no product left. inside the chamber 43 and the pressure is completely dropped so that the spring 52 can return the differential piston 7 in its rest position in abutment against the ferrule 6. The passage hole 25 is then again masked by the lip 72. By releasing the pressure on the pusher 51, the piston rises under the return action of the spring 52 while the differential piston remains completely immobile, plated on the shell 6. The rise of the piston 4 has the effect of sucking of the product inside the chamber from the container. The operating cycle is then completed.

Claims (10)

  1. A fluid-dispensing member comprising:
    a body (2) defining a chamber (43) ;
    an actuating rod (5) provided with a pusher (51);
    a piston (4) mounted on the actuating rod (5) to slide in leaktight manner in the chamber;
    an inlet valve; and
    an outlet valve (7);
       said fluid-dispensing member being characterized in that the outlet valve comprises a differential piston (7) that can be moved under the action of the pressure exerted on the fluid by the piston (4) against the action of a spring (52) which abuts at one end against the differential piston, and at its other end against the pusher.
  2. A dispensing member according to claim 1, in which said differential piston (7) is mounted to slide in the body (2).
  3. A dispensing member according to claim 2, in which the body (2) defines a cylindrical section (26) in which the differential piston is slidably received, said cylindrical section being provided with a through hole (25) that can be closed off selectively by said differential piston.
  4. A dispensing member according to any preceding claim, in which a ferrule (6) is engaged in the body (2) to define the rest position of the piston (4), said differential piston (7) being urged against said ferrule (6) by the spring (52).
  5. A dispensing member according to claim 4, in which the differential piston (7) is mounted to slide in leaktight manner on cylindrical sleeving (62) formed by a ferrule (6).
  6. A dispensing member according to claim 4, 5, or 6, in which the differential piston (7) is disposed between the pusher (51) and the ferrule (6).
  7. A dispensing member according to any preceding claim, in which the spring is situated outside the chamber.
  8. A dispensing member according to any preceding claim, in which the differential piston (7) is situated outside the chamber (43).
  9. A dispensing member according to any one of claims 3 to 8, in which the cylindrical section (26) has an inside diameter different from the inside diameter of the chamber (43) in which the piston is mounted to slide.
  10. A dispensing member according to claim 9, in which the inside diameter of the cylindrical section is greater than the inside diameter of the chamber.
EP01907797A 2000-03-20 2001-02-14 Dispensing member with outlet valve formed by a differential piston Expired - Lifetime EP1268083B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0003533 2000-03-20
FR0003533A FR2806330B1 (en) 2000-03-20 2000-03-20 VALVE DISPENSING DEVICE FORMED BY A DIFFERENTIAL PISTON
PCT/FR2001/000437 WO2001070412A1 (en) 2000-03-20 2001-02-14 Dispensing member with outlet valve formed by a differential piston

Publications (2)

Publication Number Publication Date
EP1268083A1 EP1268083A1 (en) 2003-01-02
EP1268083B1 true EP1268083B1 (en) 2005-09-21

Family

ID=8848287

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01907797A Expired - Lifetime EP1268083B1 (en) 2000-03-20 2001-02-14 Dispensing member with outlet valve formed by a differential piston

Country Status (9)

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US (1) US6371337B2 (en)
EP (1) EP1268083B1 (en)
JP (1) JP2004511324A (en)
CN (1) CN1171686C (en)
BR (1) BR0109431A (en)
DE (1) DE60113516T2 (en)
ES (1) ES2250357T3 (en)
FR (1) FR2806330B1 (en)
WO (1) WO2001070412A1 (en)

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KR100755809B1 (en) * 2001-03-23 2007-09-05 주식회사 종우실업 finger-operated spray pump ejaculating fluid in fixed quantity
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WO2003099706A1 (en) * 2002-05-23 2003-12-04 Cohen, Ben, Z. Medically accurate pump system
FR2840890B1 (en) * 2002-06-14 2004-10-15 Valois Sa FIXING MEMBER AND FLUID PRODUCT DISPENSER COMPRISING SUCH A FIXING MEMBER
US7255248B2 (en) * 2002-08-29 2007-08-14 Emsar, Inc. Plug style pump
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Also Published As

Publication number Publication date
ES2250357T3 (en) 2006-04-16
WO2001070412A1 (en) 2001-09-27
BR0109431A (en) 2002-12-10
US20010022309A1 (en) 2001-09-20
DE60113516D1 (en) 2005-10-27
DE60113516T2 (en) 2006-06-14
US6371337B2 (en) 2002-04-16
CN1424943A (en) 2003-06-18
FR2806330A1 (en) 2001-09-21
EP1268083A1 (en) 2003-01-02
CN1171686C (en) 2004-10-20
JP2004511324A (en) 2004-04-15
FR2806330B1 (en) 2002-10-25

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