EP1706213A1 - Fluid product dispensing member - Google Patents

Fluid product dispensing member

Info

Publication number
EP1706213A1
EP1706213A1 EP04817622A EP04817622A EP1706213A1 EP 1706213 A1 EP1706213 A1 EP 1706213A1 EP 04817622 A EP04817622 A EP 04817622A EP 04817622 A EP04817622 A EP 04817622A EP 1706213 A1 EP1706213 A1 EP 1706213A1
Authority
EP
European Patent Office
Prior art keywords
pusher
piston
differential piston
member according
chamber
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.)
Withdrawn
Application number
EP04817622A
Other languages
German (de)
French (fr)
Inventor
Firmin Garcia
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aptar France SAS
Original Assignee
Valois SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valois SAS filed Critical Valois SAS
Publication of EP1706213A1 publication Critical patent/EP1706213A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1001—Piston pumps
    • B05B11/1004—Piston pumps comprising a movable cylinder and a stationary piston
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1038—Pressure accumulation pumps, i.e. pumps comprising a pressure accumulation chamber
    • B05B11/104—Pressure accumulation pumps, i.e. pumps comprising a pressure accumulation chamber the outlet valve being opened by pressure after a defined accumulation stroke
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1073—Springs
    • B05B11/1074—Springs located outside pump chambers
    • 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
    • B05B11/1077—Springs characterised by a particular shape or material
    • 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
    • B05B11/1066—Pump inlet valves
    • B05B11/107—Gate valves; Sliding valves

Definitions

  • the present invention relates to a fluid product dispensing member generally intended to be associated with a fluid product reservoir to constitute together a fluid product dispenser. It is a dispensing member, the actuation of which is generally carried out manually using a finger of the user.
  • the fluid product is distributed in the form of a jet of fine spray droplets, a continuous stream or even a dab of fluid product, particularly in the case of viscous products, such as cosmetic creams.
  • a fluid dispenser member can in particular be used in the fields of perfumery, cosmetics or even pharmacy to distribute more or less viscous products.
  • the present invention relates more particularly, but not exclusively, to a type of dispensing member which is commonly designated by the term "push-pump".
  • the dispensing member comprises a pusher not only forming a dispensing orifice but further defining a part of a fluid chamber in which the fluid is selectively pressurized.
  • a pump it is a pump chamber.
  • a special feature of this push-button pump is that an internal surface of the push-button, of generally substantially cylindrical shape, serves as a sealed sliding barrel for a piston which moves in sealed contact in this barrel, thereby selectively unmasking the orifice of distribution.
  • This piston is generally a piston of the differential type which moves in response to a change in pressure of the fluid inside the chamber. This differential piston is to be distinguished from the main piston, the displacement of which is generated by the actuation of the pusher.
  • a differential piston and a main piston displaceable in sealed contact in respective drums.
  • the main barrel for the main piston can also be formed by the pusher. This is notably the case in the pump described in document WO 97/23304.
  • the pusher comprises a bearing wall on which pressure is exerted using a finger to actuate the pusher.
  • the pusher comprises a skirt which extends downwards from the support wall. This skirt forms a first sealed sliding barrel for a differential piston and a second was main for the main piston of the pump.
  • the differential piston is dissociated from the main piston.
  • the differential piston is biased away from the support wall by a spring which serves both as a return spring and as a precompression spring.
  • the sliding barrel of the differential piston is formed with an outlet duct which leads to an attached nozzle in a housing formed in the skirt of the pusher.
  • This nozzle forms a dispensing orifice at the level of which the fluid product leaves the dispensing member.
  • the housing formed by the skirt is produced with a swirl system which cooperates with the nozzle to drive the fluid product in a swirl movement before exiting through the dispensing orifice.
  • This swirl system is conventionally constituted by one or more tangential swirl channels opening into a swirl chamber precisely centered on the dispensing orifice.
  • the swirl system is in the form of a recess network inside the housing of the skirt. This recess network is then completed by the attached nozzle which isolates the swirl channels as well as the chamber.
  • the sliding barrel of the differential piston is in the form of a cylindrical surface only interrupted at the outlet channel.
  • the main piston rises in the main barrel of the pusher, which has the effect of displacing the differential piston by sealed sliding inside the differential barrel.
  • the active sealing lip of the differential piston which is in direct contact with the fluid, slides in the lower part of the barrel located under the outlet channel.
  • the pump of document WO 97/23304 consists of five essential constituent elements, namely a body intended to be associated with a reservoir of fluid product, the pusher, a ball forming an inlet valve, the differential piston and the nozzle.
  • the body forms the main piston.
  • the differential piston is pushed by the return and precompression spring against the body which thus forms a rest stop for the differential piston.
  • the differential piston leaves its abutment contact on the body and moves upwards towards the distribution wall in order to unmask the outlet conduit which leads to the nozzle. Consequently, the rest position of the differential piston is directly dependent on the body.
  • the object of the present invention is to define a dispensing member whose displacement of the differential piston is completely independent of the body.
  • the present invention provides a fluid dispenser member intended to be associated with a fluid reservoir, comprising a chamber in which the fluid product is pressurized, the chamber comprising an inlet valve and a outlet, a dispensing orifice, a main piston in leaktight sliding contact in a main barrel to vary the volume of the chamber, an actuator which can be actuated to generate a relative displacement between the main piston and the main barrel, a differential piston in contact with sealed sliding in the pusher to selectively unmask the outlet from the chamber, characterized in that it further comprises stroke limiting means for limiting the stroke of the differential piston in the pusher, said limiting means being provided between the pusher and the differential piton.
  • the differential piston is linked to the pusher so that its movement is only dependent on its interaction with the pusher, and no longer with the body.
  • the pusher and the differential piston together constitute an independent entity which can be mounted on the body in a single operation.
  • the differential piston is neither really dependent on the pusher nor really on the body, so that the mounting of the pump is relatively complicated. With a differential piston trapped in the pusher, the mounting of the dispensing member is much simpler.
  • the pusher comprises a bearing wall on which one presses to actuate the pusher along an actuation axis and a substantially cylindrical peripheral skirt, the differential piston being in sealed sliding contact with a sliding barrel formed by an internal surface of the skirt.
  • the stroke limiting means comprise a retaining member formed at the level of the support wall and a latching element formed by the differential piston, said latching element being engaged with the retaining member so to allow axial displacement of the differential piston over a limited stroke between a high stop and a low stop.
  • the retaining member comprises at least one retaining profile and the fastening element comprises at least one fastening head capable of coming into engagement with said at least one retaining profile in bottom stop.
  • the support wall comprises an external support surface and an internal surface, the hooking element coming into high abutment against said internal surface. The stroke limitation means are thus formed together by the pusher, at its bearing wall, and by the differential piston.
  • the differential piston comprises a plate defining an external periphery forming at least one sealing lip in sealing sliding contact with the barrel of the skirt, the hooking element extending from the plate towards the support wall.
  • the differential piston comprises an axial rod cooperating with a valve seat to form together said inlet valve.
  • the differential piston is biased by spring means which are formed integrally by the pusher.
  • the spring means comprise elastically deformable lugs.
  • the dispensing member comprises a return spring urging the pusher in the rest position, said spring being formed in one piece by the pusher.
  • - Figure 1 is a vertical cross-sectional view through a dispensing member according to a first embodiment in the idle state and associated with a fluid reservoir shown only partially
  • - Figure 2 is a view similar to Figure 1 in the actuated position
  • - Figure 3 is a vertical cross section similar to that of Figures 1 and 2 for another embodiment of the invention in the rest position
  • - Figure 4 is a view similar to FIG. 3 in the actuated position.
  • the embodiment of the dispensing member according to the invention shown in Figures 1 and 2 is shown in association with a container 50 defining an opening in the form of a neck 53 which advantageously has at its external surface a fixing profile.
  • the container 50 internally defines a fluid product reservoir 5.
  • the dispensing member comprises three constituent elements, namely a body 10, a pusher 20 and a piston member 30. These three parts can be produced by injection / molding of material plastic.
  • the body 10 comprises a fixing ring 11 cooperating with the neck 53 of the container 50. More specifically, the ring 11 engages around the neck 53.
  • the body 10 may also include a self-sealing lip 12 in sealing contact with the wall internal of the neck 53.
  • a guide bush 14 can extend in the extension of the fixing ring 11.
  • the ring 14 comprises at its upper end a re-entrant flap 141 whose function will be given below.
  • the body 10 also comprises a crown 13 which extends concentrically inside the guide sleeve 14. Thus, an annular space is created between the sleeve 14 and the crown 13.
  • the upper end of the crown 13 forms a main piston 133 in the form of a sealing lip.
  • the body 10 also comprises an inlet sleeve 16 which extends concentrically inside the crown 13.
  • the upper end of the sleeve 16 forms a profile or valve seat 161.
  • the body 10 forms in one piece a dip tube 15 which extends into the container 50.
  • the dip tube internally defines an inlet conduit 18 which extends into the inlet sleeve 16.
  • the pusher 20 comprises a wall support 21 and a peripheral skirt 22.
  • the skirt 22 is connected to the support wall 20 at its outer periphery.
  • the support wall 21 comprises an external support surface 211 as well as an internal surface 212.
  • the support wall 21 and the skirt 22 have a general shape of a bucket turned over with the bottom of the bucket formed by the wall of support 21 and the cylindrical side wall formed by the skirt 22.
  • the support wall 21 comprises spring means in the form of legs or elastically deformable blades 27 which extend from the internal surface 212.
  • the support wall 21 comprises a retaining member 28 which also extends from the internal surface 212.
  • the retaining member 28 comprises at least one retaining profile 281 having a retaining edge oriented towards the surface internal 212.
  • the retaining member may comprise several retaining profiles formed on the outside of a tower which extends downwards from the support wall 21.
  • the skirt 22 comprises a wall of distribution 23 as well as a guide wall 24.
  • the wall of distribution 23 is connected by its upper end to the external periphery of the support wall 21.
  • the guide wall 24 is connected by its upper end to the lower end of the distribution wall 23.
  • the distribution wall 23 includes an external surface as well as a surface internal 232.
  • the internal surface is at least partially cylindrical so as to constitute a sealed sliding barrel.
  • the internal wall 232 is advantageously formed with a swirl system 26 which forms a hollow network in the cylindrical surface 232.
  • This swirl system can comprise one or more swirl channels as well as a swirl chamber.
  • the distribution wall 23 is formed with a distribution orifice which passes through the wall so as to extend from the internal surface to the external surface.
  • the dispensing orifice 25 is centered relative to the swirl system 26.
  • the guide wall 24 is engaged in the annular space formed between the guide bush 14 and the crown 13.
  • the guide wall forms a shoulder 241 intended to come into abutment under the re-entrant flap 141 of the sleeve 14.
  • the internal surface 242 of the guide wall 24 forms a main barrel in which the main piston 133 is movable in sealed contact.
  • the guide wall 24 is biased by a spring 40 which pushes the shoulder 241 against the re-entrant flap 141.
  • the spring 40 can advantageously be produced in a single piece by the pusher in the extension of the guide wall 24.
  • the piston main 133 can slide inside the pusher, or more precisely inside the guide wall 24 which internally forms the main barrel 242.
  • the piston member 30 here forms a differential piston associated with a movable valve member input.
  • the piston member 30 comprises a plate 31 which forms at its external periphery two sealing lips 32 and 33. The plate 31 and its two lips together form the differential piston.
  • the plate 31 forms an annular housing 311 intended to receive the free ends of the elastically deformable tabs 27 formed by the support wall 21.
  • the piston member 30 forms a hooking element 39 which extends from the plate 31 in the direction of the support wall 21.
  • This attachment element 39 comprises attachment heads 392 situated at the end of lugs 391. The attachment heads 392 are engaged between the internal wall 212 and the retaining profiles 281 formed by the retaining member 28. Thus, the heads can move over a limited stroke between the retaining profiles and the internal surface of the support wall.
  • the elastically deformable tabs 27 urge the piston member 30 away from the support wall 21, so that the latching heads 392 are pushed into engagement with the retaining profiles 281.
  • the latching heads 392 can come into contact against the internal surface 212 by bending the elastically deformable legs
  • a pump chamber 1 is created between the body of the pusher and the piston member.
  • the pump chamber 1 is isolated from the outside by the lower lip 33 but communicates however with the tank through the open inlet valve. From the rest position in FIG. 1, pressure can be exerted on the external support surface 211 of the support wall 21. This has the effect of displacing the pusher and the piston member relative to the body. In one firstly, the inlet valve will be closed because the axial rod 37 penetrates deeper into the sleeve 16 so as to create a sliding sealed contact. From this moment, the pump chamber 1 is isolated from the outside.
  • the container 50, the body 10 and the piston member 30 may be identical to those of Figures 1 and 2
  • the pusher 20 comprises a distribution wall 23 and a guide wall 24 internally forming a main barrel for the main piston 133.
  • the support wall 21 also forms elastically deformable lugs 27 as well as a retaining member 28.
  • the displacement of the piston member inside the pusher 20 may be identical to that of the embodiment of FIGS. 1 and 2.
  • the pusher 20 is here associated with a cap 60 which covers the support wall 21 and the actuating wall 23.
  • the pusher can for example engage in force inside the cap.
  • the cap 60 comprises an outer peripheral crown 63 which extends concentrically in tight contact around the distribution wall 23. This crown 63 is formed with a distribution orifice 65.
  • the external surface of the wall distribution 23 which is formed with a swirl system 26 which is centered on the distribution orifice 65.
  • the return spring is formed by or in the extension of the guide wall 24 and bears the reference numeral 244.
  • the piston member 30 is trapped in the pusher while leaving it a limited axial displacement Herté, ⁇ it should also be noted that the precompression spring is formed integrally by the pusher. On the other hand, the captivity of the piston member and its limited movement are entirely ensured by the pusher and the piston member, without additional part.

Landscapes

  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Closures For Containers (AREA)
  • Coating Apparatus (AREA)
  • Reciprocating Pumps (AREA)

Abstract

The invention relates to a fluid product dispensing member which is intended to be connected to a fluid product tank (50). The inventive dispensing member consists of: a chamber (1) in which the fluid product is pressurised, said chamber comprising an inlet check valve (161, 38) and an outlet; a dispensing port (25); a main piston (133) which is in sealed sliding contact in a main barrel (242), such that the volume of the chamber can be varied; a push rod (20) which can be actuated in order to generate a relative movement between the main piston and the main barrel; and a differential piston (31, 32, 33) which is in sealed sliding contact in the push rod in order selectively to uncover the outlet of the chamber. The invention is characterised in that it also comprises stroke-limiting means (28, 39) for limiting the stroke of the differential piston in the push rod, said limiting means being provided between the push rod and the differential piston.

Description

Organe de distribution de produit fluide Fluid product distribution member
La présente invention concerne un organe de distribution de produit fluide généralement destiné à être associé à un réservoir de produit fluide pour constituer ensemble un distributeur de produit fluide. Il s'agit d'un organe de distribution dont l'actionnement est généralement réalisé manuellement à l'aide d'un doigt de l'utilisateur. Le produit fluide est distribué sous la forme d'un jet de fines gouttelettes pulvérisées, d'un filet continu ou encore d'une noisette de produit fluide, particulièrement dans le cas de produit visqueux, comme des crèmes cosmétiques. Un tel organe de distribution de produit fluide peut notamment être utilisé dans les domaines de la parfumerie, de la cosmétique ou encore de la pharmacie pour distribuer des produits plus ou moins visqueux. La présente invention s'intéresse plus particulièrement, mais pas exclusivement, à un type d'organe de distribution qui est communément désigné sous le terme de « pompe-poussoir ». Une telle désignation s'explique par le fait que l'organe de distribution comprend un poussoir formant non seulement un orifice de distribution mais définissant en outre une partie d'une chambre de produit fluide dans laquelle du produit fluide est sélectivement mis sous pression. Dans le cas d'une pompe, il s'agit d'une chambre de pompe. Une particularité de cette pompe-poussoir réside dans le fait qu'une surface interne du poussoir, de forme générale sensiblement cylindrique, sert de fût de coulissement étanche pour un piston qui se déplace en contact étanche dans ce fût pour ainsi démasquer sélectivement l'orifice de distribution. Ce piston est en général un piston du type différentiel qui se déplace en réponse à une variation de pression du produit fluide à l'intérieur de la chambre. Ce piston différentiel est à différencier du piston principal dont le déplacement est généré par l'actionnement du poussoir. Ainsi, dans une telle pompe-poussoir, il y a un piston différentiel et un piston principal, déplaçables en contact étanche dans des fûts respectifs. Le fût principal pour le piston principal peut également être formé par le poussoir. Ceci est notamment le cas dans la pompe décrite dans le document WO 97/23304. Le poussoir comprend une paroi d'appui sur laquelle on exerce une pression à l'aide d'un doigt pour actionner le poussoir. En outre, le poussoir comprend une jupe qui s'étend vers le bas à partir de la paroi d'appui. Cette jupe forme un premier fût de coulissement étanche pour un piston différentiel et un second fut principal pour le piston principal de la pompe. Le piston différentiel est dissocié du piston principal. Le piston différentiel est sollicité en éloignement de la paroi d'appui par un ressort qui sert à la fois de ressort de rappel et de ressort de précompression. Le fût de coulissement du piston différentiel est formé avec un conduit de sortie qui mène à un gicleur rapporté dans un logement formé dans la jupe du poussoir. Ce gicleur forme un orifice de distribution au niveau duquel le produit fluide sort de l'organe de distribution. En outre, le logement formé par la jupe est réalisé avec un système de tourbillonnement qui coopère avec le gicleur pour entraîner le produit fluide dans un mouvement de tourbillonnement avant de sortir à travers l'orifice de distribution. Ce système de tourbillonnement est constitué de manière conventionnelle par un ou plusieurs canaux de tourbillonnement tangentiels débouchant dans une chambre de tourbillonnement centrée de manière précise sur l'orifice de distribution. Le système de tourbillonnement se présente sous la forme d'un réseau d'évidement à l'intérieur du logement de la jupe. Ce réseau d'évidement est ensuite complété par le gicleur rapporté qui vient isoler les canaux de tourbillonnement ainsi que la chambre. Ainsi, le fût de coulissement du piston différentiel se présente sous la forme d'une surface cylindrique uniquement interrompue au niveau du canal de sortie. Lorsque l'on appuie sur le poussoir, le piston principal remonte dans le fut principal du poussoir ce qui a pour effet de déplacer le piston différentiel par coulissement étanche à l'intérieur du fût différentiel. Ceci a pour effet de comprimer le ressort : le piston différentiel se déplace alors vers le haut en direction de la paroi d'appui du poussoir. La lèvre d'étanchéité active du piston différentiel, qui est directement en contact avec le produit fluide, coulisse dans la partie inférieure du fût située sous le canal de sortie. Dès que le piston différentiel arrive au niveau du conduit de sortie, le produit fluide mis sous pression dans la chambre est refoulé hors de la chambre à travers ce conduit et parvient jusqu'au gicleur où il est mis en tourbillonnement et éjecté à travers l'orifice de distribution. La pompe du document WO 97/23304 est constituée de cinq éléments constitutifs essentiels, à savoir un corps destiné à être associé à un réservoir de produit fluide, le poussoir, une bille formant clapet d'entrée, le piston différentiel et le gicleur. Le corps forme le piston principal. Dans ce document de l'art antérieur, le piston différentiel est repoussé par le ressort de rappel et de précompression contre le corps qui forme ainsi une butée de repos pour le piston différentiel. Lorsque la pression monte dans la chambre, le piston différentiel quitte son contact de butée sur le corps et se déplace vers le haut en direction de la paroi de distribution afin de démasquer le conduit de sortie qui mène au gicleur. Par conséquent, la position de repos du piston différentiel est directement dépendante du corps. La présente invention a pour but de définir un organe de distribution dont le déplacement du piston différentiel est totalement indépendant du corps. Pour atteindre ce but, la présente invention propose un organe de distribution de produit fluide destiné à être associé à un réservoir de produit fluide, comprenant une chambre dans laquelle du produit fluide est mis sous pression, la chambre comprenant un clapet d'entrée et une sortie, un orifice de distribution, un piston principal en contact coulissant étanche dans un fût principal pour faire varier le volume de la chambre, un poussoir actionnable pour générer un déplacement relatif entre le piston principal et le fût principal, un piston différentiel en contact de coulissement étanche dans le poussoir pour démasquer sélectivement la sortie de la chambre, caractérisé en ce qu'il comprend en outre des moyens de limitation de course pour limiter la course du piston différentiel dans le poussoir, lesdits moyens de limitation étant prévus entre le poussoir et le piton différentiel. Ainsi, le piston différentiel est lié au poussoir de sorte que son déplacement est uniquement dépendant de son interaction avec le poussoir, et non plus avec le corps. De cette façon, le poussoir et le piston différentiel constituent ensemble une entité indépendante qui peut être montée sur le corps en une seule opération. Dans le document de l'art antérieur précité, le piston différentiel n'est dépendant ni vraiment du poussoir ni vraiment du corps, de sorte que le montage de la pompe est relativement compliqué. Avec un piston différentiel prisonnier du poussoir, le montage de l'organe de distribution est beaucoup plus simple. Selon une forme de réalisation avantageuse, le poussoir comprend une paroi d'appui sur laquelle on appuie pour actionner le poussoir selon un axe d'actionnement et une jupe périphérique sensiblement cylindrique, le piston différentiel étant en contact de coulissement étanche avec un fût de coulissement formé par une surface interne de la jupe. Avantageusement, les moyens de limitation de course comprennent un organe de retenue formé au niveau de la paroi d'appui et un élément d'accrochage formé par le piston différentiel, ledit élément d'accrochage étant en prise avec l'organe de retenue de manière à permettre un déplacement axial du piston différentiel sur une course limitée entre une butée haute et une butée basse. Avantageusement, l'organe de retenue comprend au moins un profil de retenue et l'élément d'accrochage comprend au moins une tête d'accrochage apte à venir en prise avec ledit au moins un profil de retenue en butée basse. Avantageusement, la paroi d'appui comprend une surface externe d'appui et une surface interne, l'élément d'accrochage venant en butée haute contre ladite surface interne. Les moyens de limitation de course sont ainsi formés ensemble par le poussoir, au niveau de sa paroi d'appui, et par le piston différentiel. Selon une forme de réalisation avantageuse, le piston différentiel comprend un plateau définissant une périphérie externe formant au moins une lèvre d'étanchéité en contact de coulissement étanche avec le fût de la jupe, l'élément d'accrochage s'étendant à partir du plateau vers la paroi d'appui. Avantageusement, le piston différentiel comprend une tige axiale coopérant avec un siège de clapet pour former ensemble ledit clapet d'entrée. Selon un autre aspect de l'invention, le piston différentiel est sollicité par des moyens de ressort qui sont formés de manière monobloc par le poussoir. Avantageusement, les moyens de ressort comprennent des pattes elastiquement déformables. Selon un autre aspect de l'invention, l'organe de distribution comprend un ressort de rappel sollicitant le poussoir en position de repos, ledit ressort étant formé de manière monobloc par le poussoir. L'invention sera maintenant plus amplement décrite en référence aux dessins donnant à titre d'exemples non limitatifs plusieurs modes de réalisation de l'invention. Sur les figures : - la figure 1 est une vue en coupe transversale verticale à travers un organe de distribution selon un premier mode de réalisation à l'état de repos et associé à un réservoir de produit fluide représenté seulement partiellement, - la figure 2 est une vue similaire à la figure 1 en position actionnée, - la figure 3 est une vue en coupe transversale verticale similaire à celle des figures 1 et 2 pour un autre mode de réalisation de l'invention en position de repos, et - la figure 4 est une vue similaire à la figure*3 en position actionnée. Le mode de réalisation de l'organe de distribution selon l'invention représenté sur les figures 1 et 2 est représenté en association avec un récipient 50 définissant une ouverture sous la forme d'un col 53 qui présente avantageusement au niveau de sa surface externe un profil de fixation. Le récipient 50 définit intérieurement un réservoir de produit fluide 5. L'organe de distribution comprend trois éléments constitutifs, à savoir un corps 10, un poussoir 20 et un organe de piston 30. Ces trois pièces peuvent être réalisées par injection/moulage de matière plastique. Le corps 10 comprend une bague de fixation 11 coopérant avec le col 53 du récipient 50. Plus précisément, la bague 11 vient en prise autour du col 53. Le corps 10 peut également comprendre une lèvre autojointante 12 en contact d'étanchéité avec la paroi interne du col 53. Une douille de guidage 14 peut s'étendre dans le prolongement de la bague de fixation 11. La bague 14 comprend au niveau de son extrémité supérieure un rabat rentrant 141 dont la fonction sera donnée ci-après. Le corps 10 comprend également une couronne 13 qui s'étend de manière concentrique à l'intérieur de la douille de guidage 14. Ainsi, il est créé un espace annulaire entre la douille 14 et la couronne 13. L'extrémité supérieure de la couronne 13 forme un piston principal 133 sous la forme d'une lèvre d'étanchéité. Le corps 10 comprend également un manchon d'entrée 16 qui s'étend de manière concentrique à l'intérieur de la couronne 13. L'extrémité supérieure du manchon 16 forme un profil ou siège de clapet 161. D'autre part, le corps 10 forme de manière monobloc un tube plongeur 15 qui s'étend dans le récipient 50. Le tube plongeur définit intérieurement un conduit d'entrée 18 qui s'étend jusque dans le manchon d'entrée 16. Le poussoir 20 comprend une paroi d'appui 21 ainsi qu'une jupe périphérique 22. La jupe 22 se raccorde à la paroi d'appui 20 au niveau de sa périphérie extérieure. La paroi d'appui 21 comprend une surface externe d'appui 211 ainsi qu'une surface interne 212. La paroi d'appui 21 et la jupe 22 présentent une forme générale de godet retourné avec le fond du godet formé par la paroi d'appui 21 et la paroi latérale cylindrique formée par la jupe 22. La paroi d'appui 21 comprend des moyens de ressort sous la forme de pattes ou de lames elastiquement déformables 27 qui s'étendent à partir de la surface interne 212. D'autre part, la paroi d'appui 21 comprend un organe de retenue 28 qui s'étend également à partir de la surface interne 212. L'organe de retenue 28 comprend au moins un profil de retenue 281 présentant une arête de retenue orientée vers la surface interne 212. En pratique, l'organe de retenue peut comprendre plusieurs profils de retenue formés à l'extérieur d'une tourette qui s'étend vers le bas à partir de la paroi d'appui 21. La jupe 22 comprend une paroi de distribution 23 ainsi qu'une paroi de guidage 24. La paroi de distribution 23 est reliée par son extrémité supérieure à la périphérie externe de la paroi d'appui 21. La paroi de guidage 24 se raccorde par son extrémité supérieure à l'extrémité inférieure de la paroi de distribution 23.The present invention relates to a fluid product dispensing member generally intended to be associated with a fluid product reservoir to constitute together a fluid product dispenser. It is a dispensing member, the actuation of which is generally carried out manually using a finger of the user. The fluid product is distributed in the form of a jet of fine spray droplets, a continuous stream or even a dab of fluid product, particularly in the case of viscous products, such as cosmetic creams. Such a fluid dispenser member can in particular be used in the fields of perfumery, cosmetics or even pharmacy to distribute more or less viscous products. The present invention relates more particularly, but not exclusively, to a type of dispensing member which is commonly designated by the term "push-pump". This designation is explained by the fact that the dispensing member comprises a pusher not only forming a dispensing orifice but further defining a part of a fluid chamber in which the fluid is selectively pressurized. In the case of a pump, it is a pump chamber. A special feature of this push-button pump is that an internal surface of the push-button, of generally substantially cylindrical shape, serves as a sealed sliding barrel for a piston which moves in sealed contact in this barrel, thereby selectively unmasking the orifice of distribution. This piston is generally a piston of the differential type which moves in response to a change in pressure of the fluid inside the chamber. This differential piston is to be distinguished from the main piston, the displacement of which is generated by the actuation of the pusher. Thus, in such a push-up pump, there is a differential piston and a main piston, displaceable in sealed contact in respective drums. The main barrel for the main piston can also be formed by the pusher. This is notably the case in the pump described in document WO 97/23304. The pusher comprises a bearing wall on which pressure is exerted using a finger to actuate the pusher. In addition, the pusher comprises a skirt which extends downwards from the support wall. This skirt forms a first sealed sliding barrel for a differential piston and a second was main for the main piston of the pump. The differential piston is dissociated from the main piston. The differential piston is biased away from the support wall by a spring which serves both as a return spring and as a precompression spring. The sliding barrel of the differential piston is formed with an outlet duct which leads to an attached nozzle in a housing formed in the skirt of the pusher. This nozzle forms a dispensing orifice at the level of which the fluid product leaves the dispensing member. In addition, the housing formed by the skirt is produced with a swirl system which cooperates with the nozzle to drive the fluid product in a swirl movement before exiting through the dispensing orifice. This swirl system is conventionally constituted by one or more tangential swirl channels opening into a swirl chamber precisely centered on the dispensing orifice. The swirl system is in the form of a recess network inside the housing of the skirt. This recess network is then completed by the attached nozzle which isolates the swirl channels as well as the chamber. Thus, the sliding barrel of the differential piston is in the form of a cylindrical surface only interrupted at the outlet channel. When the pusher is pressed, the main piston rises in the main barrel of the pusher, which has the effect of displacing the differential piston by sealed sliding inside the differential barrel. This has the effect of compressing the spring: the differential piston then moves upwards towards the support wall of the pusher. The active sealing lip of the differential piston, which is in direct contact with the fluid, slides in the lower part of the barrel located under the outlet channel. As soon as the differential piston reaches the level of the outlet duct, the fluid product pressurized in the chamber is forced out of the chamber through this conduit and reaches the nozzle where it is swirled and ejected through the dispensing orifice. The pump of document WO 97/23304 consists of five essential constituent elements, namely a body intended to be associated with a reservoir of fluid product, the pusher, a ball forming an inlet valve, the differential piston and the nozzle. The body forms the main piston. In this document of the prior art, the differential piston is pushed by the return and precompression spring against the body which thus forms a rest stop for the differential piston. When the pressure rises in the chamber, the differential piston leaves its abutment contact on the body and moves upwards towards the distribution wall in order to unmask the outlet conduit which leads to the nozzle. Consequently, the rest position of the differential piston is directly dependent on the body. The object of the present invention is to define a dispensing member whose displacement of the differential piston is completely independent of the body. To achieve this object, the present invention provides a fluid dispenser member intended to be associated with a fluid reservoir, comprising a chamber in which the fluid product is pressurized, the chamber comprising an inlet valve and a outlet, a dispensing orifice, a main piston in leaktight sliding contact in a main barrel to vary the volume of the chamber, an actuator which can be actuated to generate a relative displacement between the main piston and the main barrel, a differential piston in contact with sealed sliding in the pusher to selectively unmask the outlet from the chamber, characterized in that it further comprises stroke limiting means for limiting the stroke of the differential piston in the pusher, said limiting means being provided between the pusher and the differential piton. Thus, the differential piston is linked to the pusher so that its movement is only dependent on its interaction with the pusher, and no longer with the body. In this way, the pusher and the differential piston together constitute an independent entity which can be mounted on the body in a single operation. In the document of the aforementioned prior art, the differential piston is neither really dependent on the pusher nor really on the body, so that the mounting of the pump is relatively complicated. With a differential piston trapped in the pusher, the mounting of the dispensing member is much simpler. According to an advantageous embodiment, the pusher comprises a bearing wall on which one presses to actuate the pusher along an actuation axis and a substantially cylindrical peripheral skirt, the differential piston being in sealed sliding contact with a sliding barrel formed by an internal surface of the skirt. Advantageously, the stroke limiting means comprise a retaining member formed at the level of the support wall and a latching element formed by the differential piston, said latching element being engaged with the retaining member so to allow axial displacement of the differential piston over a limited stroke between a high stop and a low stop. Advantageously, the retaining member comprises at least one retaining profile and the fastening element comprises at least one fastening head capable of coming into engagement with said at least one retaining profile in bottom stop. Advantageously, the support wall comprises an external support surface and an internal surface, the hooking element coming into high abutment against said internal surface. The stroke limitation means are thus formed together by the pusher, at its bearing wall, and by the differential piston. According to an advantageous embodiment, the differential piston comprises a plate defining an external periphery forming at least one sealing lip in sealing sliding contact with the barrel of the skirt, the hooking element extending from the plate towards the support wall. Advantageously, the differential piston comprises an axial rod cooperating with a valve seat to form together said inlet valve. According to another aspect of the invention, the differential piston is biased by spring means which are formed integrally by the pusher. Advantageously, the spring means comprise elastically deformable lugs. According to another aspect of the invention, the dispensing member comprises a return spring urging the pusher in the rest position, said spring being formed in one piece by the pusher. The invention will now be described more fully with reference to the drawings giving by way of nonlimiting examples several embodiments of the invention. In the figures: - Figure 1 is a vertical cross-sectional view through a dispensing member according to a first embodiment in the idle state and associated with a fluid reservoir shown only partially, - Figure 2 is a view similar to Figure 1 in the actuated position, - Figure 3 is a vertical cross section similar to that of Figures 1 and 2 for another embodiment of the invention in the rest position, and - Figure 4 is a view similar to FIG. 3 in the actuated position. The embodiment of the dispensing member according to the invention shown in Figures 1 and 2 is shown in association with a container 50 defining an opening in the form of a neck 53 which advantageously has at its external surface a fixing profile. The container 50 internally defines a fluid product reservoir 5. The dispensing member comprises three constituent elements, namely a body 10, a pusher 20 and a piston member 30. These three parts can be produced by injection / molding of material plastic. The body 10 comprises a fixing ring 11 cooperating with the neck 53 of the container 50. More specifically, the ring 11 engages around the neck 53. The body 10 may also include a self-sealing lip 12 in sealing contact with the wall internal of the neck 53. A guide bush 14 can extend in the extension of the fixing ring 11. The ring 14 comprises at its upper end a re-entrant flap 141 whose function will be given below. The body 10 also comprises a crown 13 which extends concentrically inside the guide sleeve 14. Thus, an annular space is created between the sleeve 14 and the crown 13. The upper end of the crown 13 forms a main piston 133 in the form of a sealing lip. The body 10 also comprises an inlet sleeve 16 which extends concentrically inside the crown 13. The upper end of the sleeve 16 forms a profile or valve seat 161. On the other hand, the body 10 forms in one piece a dip tube 15 which extends into the container 50. The dip tube internally defines an inlet conduit 18 which extends into the inlet sleeve 16. The pusher 20 comprises a wall support 21 and a peripheral skirt 22. The skirt 22 is connected to the support wall 20 at its outer periphery. The support wall 21 comprises an external support surface 211 as well as an internal surface 212. The support wall 21 and the skirt 22 have a general shape of a bucket turned over with the bottom of the bucket formed by the wall of support 21 and the cylindrical side wall formed by the skirt 22. The support wall 21 comprises spring means in the form of legs or elastically deformable blades 27 which extend from the internal surface 212. On the other hand hand, the support wall 21 comprises a retaining member 28 which also extends from the internal surface 212. The retaining member 28 comprises at least one retaining profile 281 having a retaining edge oriented towards the surface internal 212. In practice, the retaining member may comprise several retaining profiles formed on the outside of a tower which extends downwards from the support wall 21. The skirt 22 comprises a wall of distribution 23 as well as a guide wall 24. The wall of distribution 23 is connected by its upper end to the external periphery of the support wall 21. The guide wall 24 is connected by its upper end to the lower end of the distribution wall 23.
La paroi de distribution 23 comprend une surface externe ainsi qu'une surface interne 232. La surface interne est au moins partiellement cylindrique de manière à constituer un fut de coulissement étanche. La paroi interne 232 est avantageusement formée avec un système de tourbillonnement 26 qui forme un réseau évidé dans la surface cylindrique 232. Ce système de tourbillonnement peut comprendre un ou plusieurs canaux de tourbillonnement ainsi qu'une chambre de tourbillonnement. D'autre part, la paroi de distribution 23 est formée avec un orifice de distribution qui traverse la paroi de manière à s'étendre de la surface interne jusqu'à la surface externe. L'orifice de distribution 25 est centré par rapport au système de tourbillonnement 26. La paroi de guidage 24 est engagée dans l'espace annulaire formé entre la douille de guidage 14 et la couronne 13. La paroi de guidage forme un épaulement 241 destiné à venir en butée sous le rabat rentrant 141 de la douille 14. Avantageusement, la surface interne 242 de la paroi de guidage 24 forme un fût principal dans lequel le piston principal 133 est déplaçable en contact étanche. La paroi de guidage 24 est sollicitée par un ressort 40 qui pousse l'épaulement 241 contre le rabat rentrant 141. Le ressort 40 peut avantageusement être réalisé de manière monobloc par le poussoir dans le prolongement de la paroi de guidage 24. Ainsi, le piston principal 133 peut coulisser à l'intérieur du poussoir, ou plus précisément à l'intérieur de la paroi de guidage 24 qui forme intérieurement le fût principal 242. L'organe de piston 30 forme ici un piston différentiel associé à un organe mobile de clapet d'entrée. L'organe de piston 30 comprend un plateau 31 qui forme au niveau de sa périphérie externe deux lèvres d'étanchéité 32 et 33. Le plateau 31 et ses deux lèvres forment ensemble le piston différentiel. En position de repos représentée sur la figure 1, la lèvre supérieure 32 est positionnée au- dessus du système de tourbillonnement, alors que la lèvre inférieure 33 est positionnée en dessous du système de tourbillonnement. Ainsi, le système de tourbillonnement ne peut pas communiquer avec l'intérieur du poussoir. D'autre part, le plateau 31 forme un logement annulaire 311 destiné à recevoir les extrémités libres des pattes elastiquement déformables 27 formées par la paroi d'appui 21. En outre, l'organe de piston 30 forme un élément d'accrochage 39 qui s'étend à partir du plateau 31 en direction de la paroi d'appui 21. Cet élément d'accrochage 39 comprend des têtes d'accrochage 392 situées à l'extrémité de pattes 391. Les têtes d'accrochage 392 sont en prise entre la paroi interne 212 et les profils de retenue 281 formés par l'organe de retenue 28. Ainsi, les têtes peuvent se déplacer sur une course limitée entre les profils de retenue et la surface interne de la paroi d'appui. Cependant, les pattes elastiquement déformables 27 sollicitent l'organe de piston 30 en éloignement de la paroi d'appui 21, de sorte que les têtes d'accrochage 392 sont poussées en prise avec les profils de retenue 281. Les têtes d'accrochage 392 peuvent venir en contact contre la surface interne 212 en fléchissant les pattes elastiquement déformablesThe distribution wall 23 includes an external surface as well as a surface internal 232. The internal surface is at least partially cylindrical so as to constitute a sealed sliding barrel. The internal wall 232 is advantageously formed with a swirl system 26 which forms a hollow network in the cylindrical surface 232. This swirl system can comprise one or more swirl channels as well as a swirl chamber. On the other hand, the distribution wall 23 is formed with a distribution orifice which passes through the wall so as to extend from the internal surface to the external surface. The dispensing orifice 25 is centered relative to the swirl system 26. The guide wall 24 is engaged in the annular space formed between the guide bush 14 and the crown 13. The guide wall forms a shoulder 241 intended to come into abutment under the re-entrant flap 141 of the sleeve 14. Advantageously, the internal surface 242 of the guide wall 24 forms a main barrel in which the main piston 133 is movable in sealed contact. The guide wall 24 is biased by a spring 40 which pushes the shoulder 241 against the re-entrant flap 141. The spring 40 can advantageously be produced in a single piece by the pusher in the extension of the guide wall 24. Thus, the piston main 133 can slide inside the pusher, or more precisely inside the guide wall 24 which internally forms the main barrel 242. The piston member 30 here forms a differential piston associated with a movable valve member input. The piston member 30 comprises a plate 31 which forms at its external periphery two sealing lips 32 and 33. The plate 31 and its two lips together form the differential piston. In the rest position shown in Figure 1, the upper lip 32 is positioned above the swirl system, while the lower lip 33 is positioned below the swirl system. Thus, the swirl system cannot communicate with the interior of the pusher. On the other hand, the plate 31 forms an annular housing 311 intended to receive the free ends of the elastically deformable tabs 27 formed by the support wall 21. In addition, the piston member 30 forms a hooking element 39 which extends from the plate 31 in the direction of the support wall 21. This attachment element 39 comprises attachment heads 392 situated at the end of lugs 391. The attachment heads 392 are engaged between the internal wall 212 and the retaining profiles 281 formed by the retaining member 28. Thus, the heads can move over a limited stroke between the retaining profiles and the internal surface of the support wall. However, the elastically deformable tabs 27 urge the piston member 30 away from the support wall 21, so that the latching heads 392 are pushed into engagement with the retaining profiles 281. The latching heads 392 can come into contact against the internal surface 212 by bending the elastically deformable legs
27. Il existe ainsi des moyens de Hmitation de course constitués par la coopération de l'organe de retenue avec l'élément d'accrochage. L'organe de piston 30 est ainsi prisonnier à l'intérieur du poussoir tout en étant capable de se déplacer axialement sur une course limitée. Les pattes elastiquement déformables 27 sollicitent cependant l'organe de piston en position de repos, dans laquelle les têtes d'accrochage sont en prises avec les profils de retenue. En outre, les lèvres d'étanchéité 32 et 33 sont positionnées de part et d'autre du système de tourbillonnement de manière à l'isoler. Ceci correspond à la position de repos représentée sur la figure 1. D'autre part, l'organe de piston 30 forme également une tige centrale axiale 37 qui présente au niveau de son extrémité inférieure un profil de clapet d'entrée 38 qui coopère avec le profil correspondant 161 du manchon 16 pour former ensemble le clapet d'entrée. Dans la position de repos, le clapet d'entrée est ouvert. Ainsi, une chambre de pompe 1 est créée entre le corps le poussoir et l'organe de piston. La chambre de pompe 1 est isolée de l'extérieur par la lèvre inférieure 33 mais communique cependant avec le réservoir à travers le clapet d'entrée ouvert. A partir de la position de repos de la figure 1, on peut exercer une pression sur la surface d'appui externe 211 de la paroi d'appui 21. Ceci a pour effet de déplacer le poussoir et l'organe de piston par rapport au corps. Dans un premier temps, le clapet d'entrée va être fermé du fait que la tige axiale 37 pénètre plus profondément dans le manchon 16 de manière à créer un contact étanche coulissant. A partir de ce moment, la chambre de pompe 1 est isolée de l'extérieur. Le produit fluide dans la chambre de pompe est alors soumis à une augmentation de pression, ce qui a pour effet de déplacer l'organe de piston 30 en direction de la paroi d'appui 21, à l'encontre de la force de ressort exercée par les pattes élastiques 27. Ainsi, la lèvre inférieure 33 va se déplacer vers le haut jusqu'à arriver au niveau du système de tourbillonnement 26. A partir de ce moment, le produit fluide trouve un passage de sortie à travers le système de tourbillonnement et l'orifice de distribution. Cette position d'actionnement est représentée sur la figure 2. Pour atteindre cette position, il faut que la pression à l'intérieur de la chambre de pompe soit supérieure à la raideur des pattes elastiquement déformables 27, qui jouent par conséquence un rôle de ressort de précompression. L'organe de piston 30 peut se déplacer en direction de la paroi d'appui 21 jusqu'à ce que les têtes d'accrochage 392 arrivent en butée contre la surface interne 212. Dans cette position, qui est celle de la figure 2, la lèvre d'étanchéité inférieure 33 du piston différentiel est positionnée au niveau du27. There are thus means of stroke limitation constituted by the cooperation of the retaining member with the hooking element. The piston member 30 is thus trapped inside the pusher while being able to move axially over a limited stroke. The elastically deformable tabs 27, however, urge the piston member in the rest position, in which the hooking heads are engaged with the retaining profiles. In addition, the sealing lips 32 and 33 are positioned on either side of the swirl system so as to isolate it. This corresponds to the rest position shown in Figure 1. On the other hand, the piston member 30 also forms an axial central rod 37 which has at its lower end an inlet valve profile 38 which cooperates with the corresponding profile 161 of the sleeve 16 to form together the inlet valve. In the rest position, the inlet valve is open. Thus, a pump chamber 1 is created between the body of the pusher and the piston member. The pump chamber 1 is isolated from the outside by the lower lip 33 but communicates however with the tank through the open inlet valve. From the rest position in FIG. 1, pressure can be exerted on the external support surface 211 of the support wall 21. This has the effect of displacing the pusher and the piston member relative to the body. In one firstly, the inlet valve will be closed because the axial rod 37 penetrates deeper into the sleeve 16 so as to create a sliding sealed contact. From this moment, the pump chamber 1 is isolated from the outside. The fluid in the pump chamber is then subjected to an increase in pressure, which has the effect of displacing the piston member 30 in the direction of the support wall 21, against the spring force exerted by the elastic tabs 27. Thus, the lower lip 33 will move upwards until it reaches the level of the swirl system 26. From this moment, the fluid product finds an outlet passage through the swirl system and the dispensing orifice. This actuating position is shown in Figure 2. To reach this position, the pressure inside the pump chamber must be greater than the stiffness of the elastically deformable tabs 27, which consequently act as a spring precompression. The piston member 30 can move in the direction of the support wall 21 until the hooking heads 392 abut against the internal surface 212. In this position, which is that of FIG. 2, the lower sealing lip 33 of the differential piston is positioned at the level of the
« système de tourbillonnement. Dès que la pression à l'intérieur de la chambre diminue à nouveau, l'organe de piston 30 peut s'éloigner à nouveau de la paroi d'appui 21 sous l'action des pattes élastiques 27. L'organe de piston 30 revient finalement dans sa position de repos représentée sur la figure 1. Dans le second mode de réalisation représenté sur les figures 3 et 4, le récipient 50, le corps 10 et l'organe de piston 30 peuvent être identiques à ceux des figures 1 et 2. Le poussoir 20 comprend une paroi de distribution 23 et une paroi de guidage 24 formant intérieurement un fût principal pour le piston principal 133. La paroi d'appui 21 forme également des pattes elastiquement déformables 27 ainsi qu'un organe de retenue 28. Le déplacement de l'organe de piston à l'intérieur du poussoir 20 peut être identique à celui du mode de réalisation des figures 1 et 2. Cependant, la surface interne de la paroi de distribution 23 n'est pas formée avec un système de tourbillonnement, mais uniquement avec un conduit traversant 25, qui ne forme pas l'orifice de distribution. Le poussoir 20 est ici associé à une coiffe 60 qui vient recouvrir la paroi d'appui 21 et la paroi d'actionnement 23. Le poussoir peut par exemple engager en force à l'intérieur de la coiffe. La coiffe 60 comprend une couronne périphérique extérieur 63 qui s'étend de manière concentrique en contact serrant autour de la paroi de distribution 23. Cette couronne 63 est formée avec un orifice de distribution 65. D'autre part, la surface externe de la paroi de distribution 23 qui est formée avec un système de tourbillonnement 26 qui est centré sur l'orifice de distribution 65. On peut aussi remarquer que le ressort de rappel est formé par ou dans le prolongement de la paroi de guidage 24 et porte la référence numérique 244. L'organe de piston 30 est prisonnier du poussoir tout en lui laissant une Hberté de déplacement axial limitée, π faut aussi noter que le ressort de précompression est formé de manière monobloc par le poussoir. D'autre part, la captivité de l'organe de piston et son déplacement limité sont entièrement assurés par le poussoir et l'organe de piston, sans pièce supplémentaire. "Swirl system. As soon as the pressure inside the chamber decreases again, the piston member 30 can move away again from the bearing wall 21 under the action of the elastic tabs 27. The piston member 30 returns finally in its rest position shown in Figure 1. In the second embodiment shown in Figures 3 and 4, the container 50, the body 10 and the piston member 30 may be identical to those of Figures 1 and 2 The pusher 20 comprises a distribution wall 23 and a guide wall 24 internally forming a main barrel for the main piston 133. The support wall 21 also forms elastically deformable lugs 27 as well as a retaining member 28. The displacement of the piston member inside the pusher 20 may be identical to that of the embodiment of FIGS. 1 and 2. However, the internal surface of the distribution wall 23 is not formed with a swirl system , but only ent with a through conduit 25, which does not form the orifice of distribution. The pusher 20 is here associated with a cap 60 which covers the support wall 21 and the actuating wall 23. The pusher can for example engage in force inside the cap. The cap 60 comprises an outer peripheral crown 63 which extends concentrically in tight contact around the distribution wall 23. This crown 63 is formed with a distribution orifice 65. On the other hand, the external surface of the wall distribution 23 which is formed with a swirl system 26 which is centered on the distribution orifice 65. It may also be noted that the return spring is formed by or in the extension of the guide wall 24 and bears the reference numeral 244. The piston member 30 is trapped in the pusher while leaving it a limited axial displacement Herté, π it should also be noted that the precompression spring is formed integrally by the pusher. On the other hand, the captivity of the piston member and its limited movement are entirely ensured by the pusher and the piston member, without additional part.

Claims

Revendications claims
1.- Organe de distribution de produit fluide destiné à être associé à un réservoir de produit fluide (50), comprenant : - une chambre (1) dans laquelle du produit fluide est mis sous pression, la chambre comprenant un clapet d'entrée (161, 38) et une sortie, - un orifice de distribution (25), - un piston principal (133) en contact coulissant étanche dans un fût principal (242) pour faire varier le volume de la chambre, - un poussoir (20) actionnable pour générer un déplacement relatif entre le piston principal et le fût principal, - un piston différentiel (31, 32, 33) en contact de coulissement étanche dans le poussoir pour démasquer sélectivement la sortie de la chambre, caractérisé en ce qu'il comprend en outre des moyens de limitation de course (28, 39) pour limiter la course du piston différentiel dans le poussoir, lesdits moyens de limitation étant prévus entre le poussoir et le piton différentiel. 1.- Fluid product distribution member intended to be associated with a fluid product reservoir (50), comprising: - a chamber (1) in which the fluid product is pressurized, the chamber comprising an inlet valve ( 161, 38) and an outlet, - a dispensing orifice (25), - a main piston (133) in sealed sliding contact in a main barrel (242) to vary the volume of the chamber, - a pusher (20) actuatable to generate a relative displacement between the main piston and the main barrel, - a differential piston (31, 32, 33) in sealed sliding contact in the pusher to selectively unmask the outlet of the chamber, characterized in that it comprises further stroke limiting means (28, 39) for limiting the stroke of the differential piston in the pusher, said limiting means being provided between the pusher and the differential stud.
2.- Organe de distribution de produit fluide selon la revendication 1, dans lequel le poussoir comprend une paroi d'appui (21) sur laquelle on appuie pour actionner le poussoir selon un axe d'actionnement (X) et une jupe périphérique sensiblement cylindrique (22), le piston différentiel étant en contact de coulissement étanche avec un f t de coulissement formée par une surface interne (232) de la jupe. 2.- fluid dispenser member according to claim 1, wherein the pusher comprises a support wall (21) on which is pressed to actuate the pusher along an actuation axis (X) and a substantially cylindrical peripheral skirt (22), the differential piston being in sealed sliding contact with a sliding ft formed by an internal surface (232) of the skirt.
3.- Organe de distribution de produit fluide selon la revendication 2, dans lequel les moyens de limitation de course comprennent un organe de retenue (28) formé au niveau de la paroi d'appui et un élément d'accrochage (39) formé par le piston différentiel, ledit élément d'accrochage étant en prise avec l'organe de retenue de manière à permettre un déplacement axial du piston différentiel sur une course limitée entre une butée haute et une butée basse. 3.- fluid dispenser member according to claim 2, wherein the stroke limiting means comprise a retaining member (28) formed at the support wall and a hooking element (39) formed by the differential piston, said hooking element being engaged with the retaining member so as to allow an axial displacement of the differential piston over a limited stroke between a high stop and a low stop.
4.- Organe de distribution de produit fluide selon la revendication 3, dans lequel l'organe de retenue (28) comprend au moins un profil de retenue (281) et l'élément d'accrochage (39) comprend au moins une tête d'accrochage (392) apte à venir en prise avec ledit au moins un profil de retenue en butée basse. 4. A fluid dispenser member according to claim 3, wherein the retaining member (28) comprises at least one profile of retainer (281) and the attachment element (39) comprises at least one attachment head (392) capable of coming into engagement with said at least one retention profile in bottom stop.
5.- Organe de distribution de produit fluide selon la revendication 3 ou 4, dans lequel la paroi d'appui comprend une surface externe d'appui5.- fluid product dispensing member according to claim 3 or 4, wherein the support wall comprises an external support surface
(211) et une surface interne (212), l'élément d'accrochage (39) venant en butée haute contre ladite surface interne. (211) and an internal surface (212), the hooking element (39) coming into high abutment against said internal surface.
6.- Organe de distribution de produit fluide selon la revendication 3 à6.- fluid product distribution member according to claim 3 to
5, dans lequel le piston différentiel comprend un plateau (31) définissant une périphérie externe formant au moins une lèvre d'étanchéité (32, 33) en contact de coulissement étanche avec le fût de la jupe, l'élément d'accrochage s'étendant à partir du plateau vers la paroi d'appui. 5, in which the differential piston comprises a plate (31) defining an external periphery forming at least one sealing lip (32, 33) in sealed sliding contact with the barrel of the skirt, the latching element s' extending from the tray to the support wall.
7.- Organe de distribution de produit fluide selon l'une quelconque des revendications précédentes, dans lequel le piston différentiel comprend une tige axiale (37) coopérant avec un siège de clapet (161) pour former ensemble ledit clapet d'entrée. 7. A fluid dispenser member according to any one of the preceding claims, wherein the differential piston comprises an axial rod (37) cooperating with a valve seat (161) to form together said inlet valve.
8.- Organe de distribution de produit fluide selon l'une quelconque des revendications précédentes, dans lequel le piston différentiel est sollicité par des moyens de ressort (27) qui sont formés de manière monobloc par le poussoir. 8. A fluid dispenser member according to any one of the preceding claims, wherein the differential piston is biased by spring means (27) which are formed integrally by the pusher.
9.- Organe de distribution de produit fluide selon la revendication 8, dans lequel les moyens de ressort comprennent des pattes elastiquement déformables (27). 9. A fluid dispenser member according to claim 8, wherein the spring means comprise elastically deformable tabs (27).
10.- Organe de distribution de produit fluide selon l'une quelconque des revendications précédentes, comprenant un ressort de rappel (244) sollicitant le poussoir en position de repos, ledit ressort étant formé de manière monobloc par le poussoir. 10. A fluid dispenser member according to any one of the preceding claims, comprising a return spring (244) urging the pusher in the rest position, said spring being formed integrally by the pusher.
EP04817622A 2003-12-22 2004-12-20 Fluid product dispensing member Withdrawn EP1706213A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0315192A FR2864045B1 (en) 2003-12-22 2003-12-22 FLUID PRODUCT DISPENSING MEMBER.
PCT/FR2004/050727 WO2005063404A1 (en) 2003-12-22 2004-12-20 Fluid product dispensing member

Publications (1)

Publication Number Publication Date
EP1706213A1 true EP1706213A1 (en) 2006-10-04

Family

ID=34630467

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04817622A Withdrawn EP1706213A1 (en) 2003-12-22 2004-12-20 Fluid product dispensing member

Country Status (7)

Country Link
EP (1) EP1706213A1 (en)
JP (1) JP2007515285A (en)
CN (3) CN1898030A (en)
BR (1) BRPI0417925A (en)
ES (1) ES2349593T3 (en)
FR (1) FR2864045B1 (en)
WO (1) WO2005063404A1 (en)

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US8267609B2 (en) * 2009-03-19 2012-09-18 Jbl Radical Innovations, Llc Vial for delivering contents onto a substrate
CN102430534B (en) * 2011-10-28 2013-06-26 中国农业科学院农田灌溉研究所 Pulse energy storage type high-pressure water jet cleaning system
CN104760767A (en) * 2014-01-08 2015-07-08 李和伟 Packaging device of freeze-drying excipient preparation with barrier property and manufacturing method of packaging device
FR3032188B1 (en) * 2014-12-19 2017-11-17 Albea Le Treport SYSTEM FOR ACTUATING A FLUID PRODUCT DISPENSING MEMBER
CN108025322B (en) * 2015-07-09 2021-04-13 分配技术有限公司 System for dosed dispensing of a fluid and manufacturing method
DE102016205772B4 (en) 2016-04-07 2017-11-30 Minimax Gmbh & Co. Kg Quick opening valve for a pressurized extinguishing fluid container and extinguishing fluid container with selbigem
CN107628355B (en) * 2016-07-19 2023-05-26 丁要武 Emulsion pump with water inlet prevention mechanism
KR101906979B1 (en) * 2017-03-09 2018-10-11 (주)연우 Pump vessel for dispensing of bead

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DE3928521A1 (en) * 1989-08-29 1991-03-14 Megaplast Dosiersysteme DOSING PUMP
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See also references of WO2005063404A1 *

Also Published As

Publication number Publication date
FR2864045A1 (en) 2005-06-24
BRPI0417925A (en) 2007-04-17
ES2349593T3 (en) 2011-01-05
WO2005063404A1 (en) 2005-07-14
JP2007515285A (en) 2007-06-14
FR2864045B1 (en) 2006-03-31
CN1905948A (en) 2007-01-31
CN1898030A (en) 2007-01-17
CN1898029A (en) 2007-01-17

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