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)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=34630467

Family Applications (1)

Country Status (7)

Families Citing this family (8)

Citations (4)

• 2003
  • 2003-12-22 FR FR0315192A patent/FR2864045B1/fr not_active Expired - Fee Related
• 2004
  • 2004-05-14 ES ES04742737T patent/ES2349593T3/es not_active Expired - Lifetime
  • 2004-05-14 CN CNA200480040753XA patent/CN1905948A/zh active Pending
  • 2004-05-14 CN CNA2004800384010A patent/CN1898030A/zh active Pending
  • 2004-12-20 BR BRPI0417925-0A patent/BRPI0417925A/pt not_active Application Discontinuation
  • 2004-12-20 CN CNA2004800381370A patent/CN1898029A/zh active Pending
  • 2004-12-20 JP JP2006546277A patent/JP2007515285A/ja not_active Withdrawn
  • 2004-12-20 WO PCT/FR2004/050727 patent/WO2005063404A1/fr not_active Application Discontinuation
  • 2004-12-20 EP EP04817622A patent/EP1706213A1/fr not_active Withdrawn

Patent Citations (5)

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