EP1949973A1 - Pump for dispensing a dose of a liquid product and range including such pumps - Google Patents

Pump for dispensing a dose of a liquid product and range including such pumps Download PDF

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Publication number
EP1949973A1
EP1949973A1 EP07122890A EP07122890A EP1949973A1 EP 1949973 A1 EP1949973 A1 EP 1949973A1 EP 07122890 A EP07122890 A EP 07122890A EP 07122890 A EP07122890 A EP 07122890A EP 1949973 A1 EP1949973 A1 EP 1949973A1
Authority
EP
European Patent Office
Prior art keywords
pump
piston
end member
stop
orifice
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.)
Granted
Application number
EP07122890A
Other languages
German (de)
French (fr)
Other versions
EP1949973B1 (en
Inventor
Yohann Langlois
Christophe Roy
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.)
Silgan Dispensing Systems Le Treport SAS
Original Assignee
Rexam Dispensing Systems 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 Rexam Dispensing Systems SAS filed Critical Rexam Dispensing Systems SAS
Publication of EP1949973A1 publication Critical patent/EP1949973A1/en
Application granted granted Critical
Publication of EP1949973B1 publication Critical patent/EP1949973B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1001—Piston pumps
    • B05B11/1005—Piston pumps with means for adjusting or modifying pump stroke
    • B05B11/1007—Piston pumps with means for adjusting or modifying pump stroke by adjusting or modifying the pump end-of-sucking-stroke position
    • 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
    • B05B11/1005—Piston pumps with means for adjusting or modifying pump stroke
    • B05B11/1008—Piston pumps with means for adjusting or modifying pump stroke by adjusting or modifying the pump end-of-dispensing-stroke position
    • 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
    • B05B11/1023—Piston pumps having an outlet valve opened by deformation or displacement of the piston relative to its actuating stem
    • 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
    • B05B11/1023—Piston pumps having an outlet valve opened by deformation or displacement of the piston relative to its actuating stem
    • B05B11/1025—Piston pumps having an outlet valve opened by deformation or displacement of the piston relative to its actuating stem a spring urging the outlet valve in its closed position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1073—Springs
    • B05B11/1074—Springs located outside pump chambers

Definitions

  • the invention relates to a pump for dispensing a dose of fluid and a range comprising such pumps.
  • the compression member may be angularly offset relative to the central axis, causing a seal fault between the piston and the body and a risk of premature wear of the piston.
  • the invention aims to overcome the problems mentioned above.
  • the invention proposes a pump of the aforementioned type in which the limit stop is formed by a shoulder formed on the inner surface of the end member, the nozzle comprising a flange movable in the body of the end member. end facing the inner surface of said end member, the collar being adapted to abut against the shoulder in the end position.
  • the collar provides guiding the nozzle in the end member when the compression member is moved according to the stroke.
  • the support of the flange on the shoulder is evenly distributed within the end member.
  • the compression member extends along the central axis at all stages of operation of the pump, which ensures a distributed support between the piston and the body. The seal between the piston and the body can thus be ensured and the wear of the piston can be limited.
  • the invention also aims to allow the simple realization of a range of pumps in which pumps having similar components, materials, technical characteristics and operation can dispense doses of fluid of different volume.
  • the invention also proposes a range of pumps comprising at least first and second pumps as defined above, said first and second pumps being adapted to dispense doses of fluid product respectively having first and second different volumes.
  • the respective end stops of the end member of the first and second pumps being located respectively at first and second distances from the inlet, said first and second distances being different from one of the other
  • Each pump of such a range is adapted to dispense a dose of fluid product of a determined volume.
  • the end member forms a single module for adjusting the volume of the dose to be dispensed. so as to reduce the number of manufacturing operations and to limit the adaptation of the design machines to be able to vary the volumes of the dose to be dispensed by the pumps of the same range.
  • a pump for dispensing a dose of fluid, liquid or viscous product, for example from the field of perfumery, pharmacy, cosmetics or other.
  • the pump may belong to a range of pumps in which pumps, having similar components, materials, technical characteristics and operation, are adapted to dispense fluid doses having different volumes.
  • the pump is intended to be arranged by the first end 3 of the body 1 in an opening of a tank, not shown, and fixed in a known manner, for example by fitting and / or by means of a fastener, to the reservoir so that it can take a dose of fluid contained in the reservoir.
  • the terms “upper” or “high” and “lower” or “low” will be understood with respect to locations located respectively close to the second end 4 of the body 1 and close to the first end. 3 of the body 1.
  • the terms “axial” or “longitudinal” and “radial” or “transverse” refer to planes respectively parallel and perpendicular to the central axis A.
  • the body 1 and the compression member delimit a metering chamber 2 formed between the inlet port 6 and the exhaust port.
  • the compression member can then be moved inside the body 1 according to the stroke so, by varying the volume of the metering chamber 2, to be able alternately to introduce fluid into the metering chamber 2 by the intake port 6 and make out the fluid from the metering chamber 2 through the exhaust port.
  • the body 1 has an annular side wall 7 in which the compression member is mounted.
  • the side wall 7 has an inner surface, a surface outer, a lower end, an open upper end having an annular flange 5 protruding outwardly and forming the second end 4 of the body 1.
  • a through hole forming a vent hole 8 may be formed in the side wall 7 so as to allow air passage between the outside and the inside of the tank to compensate for the dose of fluid taken by the pump.
  • the body 1 may also have an annular bottom wall 9 which extends from the lower end of the side wall 7 and whose free end forms the first end 3 of the body 1 that is, the lower end.
  • the bottom wall 9 internally comprises the inlet port 6 and an inlet valve, for example a ball valve comprising a ball 10 and a seat 11, adapted to allow the selective sealing of the inlet port 6 , that is to say its opening, the ball 10 being spaced from the seat 11, or its closure, the ball 10 resting on the seat 11.
  • the abutment members 12 may be provided opposite and away from the seat 11 to form a cage limiting the movements of the ball 10.
  • the bottom wall 9 may for example receive by fitting a dip tube, not shown, for communicating the metering chamber with the reservoir.
  • the invention is however not limited in particular to a body 1 or an intake valve as described above.
  • the body 1 may be devoid of bottom wall 9, the lower end of the side wall 7 forming the first end 3 of the body 1, or comprise an inner wall surrounded by the side wall 7, the inlet valve and the inlet port 6 being adapted accordingly.
  • the pump further comprises an end member 14 having a central opening and associated with the upper end 4 of the body 1.
  • the end member 14 may comprise a tubular wall which extends along the central axis A.
  • the end member 14 then has an outer surface and an inner surface which delimits the central opening.
  • the tubular wall of the end member 14 can form a lower tubular skirt 14a fitted inside the body 1.
  • the outer surface of the skirt 14a can then be arranged at least locally in contact with the inner surface of the side wall 7 of the body 1.
  • an annular ring 28 may be provided on the outer surface of the skirt 14a to come into contact with the inner surface of the body 1 and allow the attachment of the end member 14 inside the body 1.
  • a shoulder 15 protruding radially outwardly can be provided at one end of the skirt 14a to rest on the flange 5 of the body 1.
  • the skirt 14a may then have a free end 37, opposite the shoulder 15, which may be spaced from the inner surface of the body 1.
  • the skirt 14a may comprise an axial end zone 38 which comprises the free end 37 and which is offset radially with respect to the central axis A towards the interior of the body 1.
  • An annular space can thus be formed between the inner surface of the body 1 and the outer surface of the end zone 38 of the skirt 14a.
  • the inner surface of the side wall 7 of the body 1 can be adapted and, for example, have an enlarged part at the upper end 4 and a restricted portion against which the skirt 14a is fitted, an inclined portion joining the two parts.
  • end member 14 with the second end 4 of the body 1 by any other means and the end member 14 can be associated with the outer surface of the side wall 7 of the body 1.
  • tubular wall of the end member 14 may also form an upper tubular sleeve 14b which protrudes with respect to the upper end 4 of the body 1.
  • the nozzle 20 may comprise an elongated axial actuating tube 21 which delimits an outlet duct for the fluid product from the metering chamber 2 to the outside.
  • the actuating tube 21 extends inside the end member 14 and comprises an open bottom end disposed inside the body 1 and located near the inlet port 6, and an open upper end, located at a distance from the inlet orifice 6 and protruding with respect to the upper end 4 of the body 1.
  • the upper end of the actuating tube 21 may be adapted to allow the attachment of an actuator, such as a pusher not shown, on which a user can exert pressure to actuate the pump by moving the nozzle 20 from the home position to the end position.
  • an actuator such as a pusher not shown
  • the nozzle 20 is resiliently biased towards the rest position.
  • the actuating tube 21 may have an annular rim 23 which extends radially outwards.
  • An elastic member for example a compression spring 17, can then extend between the edge 23 of the actuating tube 21 and a radial projection 16 which extends from the inner surface of the end member 14 inward, substantially to the opposite of the ring 28.
  • the compression spring 17 thus disposed around the actuating tube 21 outside the metering chamber 2 improves the compactness of the pump and prevents contact between the fluid and the compression spring 17.
  • the end member 14 includes the rest stop and the end stop.
  • the free end 37 of the skirt 14a forms the rest stop against which the piston 25 is directly in abutment in the rest position of the compression member.
  • the end stop can be formed, for example in the form of a shoulder 39, on the inner surface of the end member 14.
  • the nozzle 20 can then be adapted to abut directly against the shoulder 39 in the end position.
  • the shoulder 39 is an annular projection on the inner surface of the tubular wall of the end member.
  • the rest stop is then located between the limit stop and the lower end 3 of the body.
  • the axial stroke of the compression member is defined by the difference between, on the one hand, the distance of the parts of the piston 25 and the nozzle 20 intended to abut on the stops of rest and end of stroke and, d ' on the other hand, the distance between the free end 37 and the shoulder 39 of the end member 14.
  • first d1 and second d2 distances from the inlet port 6 the first distance d1 being fixed regardless of the volume of the dose to be dispensed and the second distance d2 being adapted to be modulated so as to set a volume for the dose.
  • All pumps of the same range distributing doses of different volumes can thus have the same rest position, which simplifies the realization of the bodies of dressing of the upper part of the pump and can be the same for all the pumps.
  • the free end 37 of the skirt 14a may be adapted in particular to provide a seal between the piston 25 and the end member 14, in the rest position, without having to be modified and developed in a pump to the other.
  • FIG. 1 and 2 there is shown a first pump adapted to dispense doses of fluid product having a first volume.
  • the free end 37 of the end member 14 is located at a distance d1 from the inlet port 6 and the shoulder 39 is located at a distance d2 from the inlet port 6.
  • the shoulder 39 can then be on the inner surface of the skirt 14a.
  • a second pump belonging to the same range as the first pump is adapted to dispense doses of fluid product having a second volume different from the first volume, for example, less than the first volume.
  • the free end 37 of the end member 14 is situated at the same distance d1 from the inlet orifice 6 as the first pump but the shoulder 39 is located at a distance d2 'from the orifice d different admission 6, for example greater than that of the first pump.
  • the shoulder 39 can then be on the inner surface of the sleeve 14b.
  • the actuating tube 21 may comprise a collar 19 which extends axially from the free end of the rim 23 of the actuating tube 21 to be in abutment against the annular shoulder 39 in the end position. In the end-of-travel position, the support of the flange 19 on the shoulder 39 can thus be evenly distributed over an annular zone of the end member 14.
  • the actuating tube 21 is held in accordance with FIG. axis A which ensures a distributed support between the piston 25 and the body 1.
  • the flange 19 surrounding a portion of the actuating tube 21 has an external transverse dimension substantially equal to or less than the internal transverse dimension of a portion of the inner surface of the end member 14 so as to be movable, in particular together with the actuating tube 21, in the end member 14 facing the inner surface of said end member 14.
  • the flange 19 is integrally formed with the actuating tube 21.
  • provision may however be made for the flange 19 and / or the rim 23 to be attached.
  • the position on the nozzle 20 and / or the length of the flange 19 are also adjustable to be able to vary the stroke of the compression member and the volume of the dose of fluid product to distribute.
  • the nozzle 20 may also comprise an insert 22 elongate assembled to the actuating tube 21.
  • the insert 22 may comprise a base 30 which extends generally transversely with respect to the central axis A and which is disposed inside the metering chamber 2 opposite the intake port 6.
  • the base 30 may have a concavity facing upwards and comprise a central portion 31 and a frustoconical peripheral flange 32 flaring upwards.
  • the insert 22 and the actuating tube 21 define between them one or more passages, forming the exhaust port, for the fluid product from the metering chamber 2 to the outlet duct.
  • the piston 25 can then be mounted to slide axially on the nozzle 20 and comprise annular sealing surfaces adapted to come into sealing contact with annular sealing surfaces formed on the base 30 and thus form an exhaust valve 33 selectively closing during the sliding of the piston 25 on the nozzle 20, the exhaust port.
  • the actuating tube 21 may have, in the vicinity of the lower end, an end portion 24 of reduced transverse dimension.
  • the end portion 24 on which the piston 25 is slidably mounted may, for example, be delimited upwards by a shoulder or a flared portion 18.
  • the actuating tube 21 and the insert 22 may be two separate pieces assembled after the piston 25 has been mounted on the actuating tube 21.
  • the insert 22 can be inserted into the open end of the tube actuation 21.
  • the rim 23 being integral with the actuating tube 21, the end portion 24 of the actuating tube 21 is inserted into the end member 14 through the central opening of the sleeve 14b prior to the assembly of the piston 25 and the insert 22 and the mounting of the end member 14 on the body 1 of the pump.
  • the edge 23 and the flange 19 can however be attached, the mounting of the end member 14 can then be performed after the assembly of the piston 25 and the insert 22.
  • a swiveling may be provided between the insert 22 and the actuating tube 21.
  • the insert 22 may comprise a rod 34 which extends from the central portion 31 of the base 30 substantially perpendicular thereto.
  • the rod 34 may comprise a free end, opposite the base 30, provided with a head 35 snapped onto an annular flange 36 formed inside the actuating tube 21, an axial clearance and a transverse clearance being formed between the insert 22 and the actuating tube 21.
  • the insert 22 may comprise a hollow rod 34 delimiting a lower portion of the outlet duct and the exhaust orifice may be provided transversely on the actuating tube 21 or, where appropriate , on the hollow stem.
  • the piston 25 is adapted to bear tightly against the inner surface of the side wall 7 of the body 1 and in contact with the sealing surfaces of the base 30.
  • the piston 25 may comprise a central sleeve 26 slidably mounted on the end portion 24 of the actuating tube 21 between the flared portion 18 and the base 30, the distance between the flared portion 18 and the base 30 being adapted to obtain a sufficient opening of the exhaust valve 33.
  • the insert 22 comprises a hollow rod 34, it could be provided to mount the piston 25 on the insert 22.
  • the central sleeve 26 may have a lower free end which extends into the concavity of the base 30 so as to define the sealing surfaces coming into contact with the sealing surfaces of the base 30.
  • the sealing surfaces of the base 30 can thus be located on either side of the free end of the sleeve 26 to provide an improved seal of the exhaust valve 33.
  • the piston 25 may also comprise an axial annular sleeve 27 surrounding the central sleeve 26 and connected thereto by a substantially radial wall.
  • the sleeve 27 may define an upper lip and a lower lip which come into rubbing contact with the inner surface of the side wall 7 of the body 1, the vent hole 8 being disposed between the upper and lower lips in the rest position.
  • the piston 25 may comprise an annular groove 41, formed for example between the upper lip and the central sleeve 26, in which the extreme zone 38 of the skirt 14a is arranged in sealed contact in the rest position.
  • the nozzle 20 urged by the compression spring 17 is in its rest position ( figures 1 and 3 ).
  • the piston 25 is in abutment against the free end 37 of the skirt 14a of the end member 14, a sealed contact being established between the end zone 38 of the skirt 14a and the piston 25.
  • the free end of the sleeve central 26 rests against the base 30 to close the exhaust valve 33.
  • the inlet valve is closed.
  • the frictional force between the piston 25 and the body 1 is greater than the frictional force between the piston 25 and the nozzle 20.
  • the actuating tube 21 slides by relative to the piston 25 so as to open the exhaust valve 33.
  • the actuating tube 21 can slide relative to the piston 25 until the lower end of the actuating tube 21 abuts against a narrowing of the central sleeve 26 or until the shoulder or the flared portion 18 of the actuating tube 21 abuts against the central sleeve 26.
  • the displacement of the actuating tube 21 causes the piston 25 to move towards the inlet orifice 6.
  • the displacement of the nozzle 20 can be continued until the flange 19 comes into abutment against the annular shoulder 39 .
  • the compression member reaches the end position ( figures 2 and 4 ), the inlet valve being closed.
  • the compression spring 17 urges the actuating tube 21 towards the remote position and, because of the difference in the friction forces, the actuating tube 21 slides relative to the piston 25 until the central sleeve 26 comes into contact with the base 30 and closes the exhaust valve 33. Then, the rise of the nozzle 20 is accompanied by the raising of the piston 25 in the body 1 and therefore d an increase in the volume of the metering chamber 2. A depression is created in the metering chamber 2, which causes the opening of the intake valve, the ball 10 being offset relative to the seat 11, and a suction of the produced in the dosing chamber 2.
  • an elastic member such as a pre-compression spring, particularly in the presence of a fluid product of low viscosity, this spring being in high support on the one hand on the nozzle 20, for example against a shoulder, and on the other hand in a low support against the piston 25, so that it is necessary that a certain pressure is reached in the metering chamber 2 so that the exhaust valve 33 opens.
  • the displacement of the nozzle 20 from the rest position to the end position allows, when the metering chamber 2 is filled with air, before the first use, to expel air for the replace with fluid.
  • the base 30 has a filling member 40, for example integral with the free end of the flange 32.
  • the filling member 40 can be adapted to occupy a dead volume of the metering chamber 2, for example between the central sleeve 26 and the sleeve 27. It can also be provided that the filling member 40 is adapted to bear against the inner surface of the sleeve 27 in the rest position to improve the sealing of the pump.

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

Abstract

The pump has a tubular body (1) extending along a central axis (A) between a lower end (3) and an upper end (4) of the body. An end member (14) has a central opening associated with the upper end of the body. A dosage chamber (2) is formed between an inlet orifice (6) and an exhaust orifice, and is delimited by the body and a compression unit. An inlet valve and an exhaust valve (33) selectively close the inlet orifice and the exhaust orifice, respectively. The compression unit is stopped against a limit stop i.e. shoulder (39), of the end member in stroke end position.

Description

L'invention se rapporte à une pompe pour distribuer une dose de produit fluide ainsi qu'à une gamme comprenant de telles pompes.The invention relates to a pump for dispensing a dose of fluid and a range comprising such pumps.

Plus particulièrement, l'invention se rapporte à une pompe pour distribuer une dose de produit fluide, comprenant :

  • un corps tubulaire s'étendant selon un axe central entre une première et une deuxième extrémités et comportant un orifice d'admission au voisinage de la première extrémité,
  • un organe d'extrémité présentant une ouverture centrale et associé à la deuxième extrémité du corps, l'organe d'extrémité comportant une paroi tubulaire qui s'étend selon l'axe central et qui présente une surface extérieure et une surface intérieure, l'organe d'extrémité comportant une butée de repos et une butée de fin de course,
  • un organe de compression monté mobile à l'intérieur du corps selon une course axiale entre une position de repos, éloignée de l'orifice d'admission et dans laquelle ledit organe de compression est en butée contre la butée de repos, et une position de fin de course, rapprochée de l'orifice d'admission et dans laquelle ledit organe de compression est en butée contre la butée de fin de course, ledit organe de compression étant rappelé élastiquement vers la position de repos et comprenant un gicleur s'étendant dans l'ouverture centrale de l'organe d'extrémité, un piston coulissant à l'intérieur du corps et un orifice d'échappement,
  • une chambre de dosage formée entre l'orifice d'admission et l'orifice d'échappement et délimitée par le corps et l'organe de compression,
  • un clapet d'admission et un clapet d'échappement adaptés pour obturer sélectivement respectivement l'orifice d'admission et l'orifice d'échappement.
More particularly, the invention relates to a pump for dispensing a dose of fluid, comprising:
  • a tubular body extending along a central axis between a first and a second end and having an inlet orifice in the vicinity of the first end,
  • an end member having a central opening and associated with the second end of the body, the end member having a tubular wall which extends along the central axis and which has an outer surface and an inner surface, the end member comprising a rest stop and an end stop,
  • a compression member mounted movably inside the body in an axial stroke between a rest position, remote from the inlet and in which said compression member abuts against the rest stop, and a position of end of stroke, close to the inlet orifice and wherein said compression member is in abutment against the limit stop, said compression member being resiliently biased towards the rest position and comprising a nozzle extending into the central opening of the end member, a piston sliding inside the body and an exhaust port,
  • a metering chamber formed between the intake port and the exhaust port and delimited by the body and the compression member,
  • an intake valve and an exhaust valve adapted to selectively close the orifice respectively intake and the exhaust port.

Le document WO-2006/008597 décrit une pompe de ce type dans laquelle l'organe d'extrémité est pourvu d'une rainure pour limiter la course de l'organe de compression.The document WO-2006/008597 describes a pump of this type in which the end member is provided with a groove to limit the stroke of the compression member.

Toutefois, dans une telle pompe, l'organe de compression peut être décalé angulairement par rapport à l'axe central, provoquant un défaut d'étanchéité entre le piston et le corps ainsi qu'un risque d'usure prématurée du piston.However, in such a pump, the compression member may be angularly offset relative to the central axis, causing a seal fault between the piston and the body and a risk of premature wear of the piston.

L'invention vise à pallier les problèmes évoqués ci-dessus.The invention aims to overcome the problems mentioned above.

A cet effet, l'invention propose une pompe du type précité dans laquelle la butée de fin de course est formée par un épaulement ménagé sur la surface intérieure de l'organe d'extrémité, le gicleur comprenant une collerette mobile dans l'organe d'extrémité en regard de la surface intérieure dudit organe d'extrémité, la collerette étant adaptée pour être en butée contre l'épaulement en position de fin de course.For this purpose, the invention proposes a pump of the aforementioned type in which the limit stop is formed by a shoulder formed on the inner surface of the end member, the nozzle comprising a flange movable in the body of the end member. end facing the inner surface of said end member, the collar being adapted to abut against the shoulder in the end position.

Ainsi, la collerette offre un guidage du gicleur dans l'organe d'extrémité lorsque l'organe de compression est déplacé selon la course. De plus, en position de fin de course, l'appui de la collerette sur l'épaulement est réparti de manière uniforme à l'intérieur de l'organe d'extrémité. L'organe de compression s'étend selon l'axe central à tous les stades du fonctionnement de la pompe, ce qui assure un appui réparti entre le piston et le corps. L'étanchéité entre le piston et le corps peut ainsi être assurée et l'usure du piston peut être limitée.Thus, the collar provides guiding the nozzle in the end member when the compression member is moved according to the stroke. In addition, in the end position, the support of the flange on the shoulder is evenly distributed within the end member. The compression member extends along the central axis at all stages of operation of the pump, which ensures a distributed support between the piston and the body. The seal between the piston and the body can thus be ensured and the wear of the piston can be limited.

Dans des modes de réalisation particuliers, la pompe peut présenter, de manière éventuellement complémentaire, une ou plusieurs des dispositions suivantes :

  • le gicleur est adapté pour être en butée directement contre la butée de fin de course en position de fin de course,
  • l'organe d'extrémité comporte une jupe tubulaire emmanchée à l'intérieur du corps et présentant une extrémité libre qui forme la butée de repos, le piston étant en butée directement contre l'extrémité libre de la jupe en position de repos : l'extrémité libre de la jupe peut alors former une partie sensible de l'organe d'extrémité permettant de réaliser une étanchéité entre le piston et l'organe d'extrémité en position de repos, la pompe telle que définie ci-dessus peut permettre d'éviter la modification de cette partie de l'organe d'extrémité et d'éviter l'adaptation, la mise au point et le contrôle particulièrement précis et délicats des machines de conception de cette partie,
  • la jupe comporte une zone extrême axiale qui comprend l'extrémité libre et qui est décalée radialement vers l'intérieur du corps, le piston comportant une rainure annulaire dans laquelle la zone extrême est disposée en contact étanche en position de repos.
In particular embodiments, the pump may optionally present one or more of the following provisions:
  • the nozzle is adapted to abut directly against the limit stop in the end position,
  • the end member has a tubular skirt fitted inside the body and having a free end which forms the rest stop, the piston being in abutment directly against the free end of the skirt in the rest position: the free end of the skirt can then form a sensitive part of the end member allowing to achieve a seal between the piston and the end member in the rest position, the pump as defined above can prevent the modification of this part of the end member and avoid adaptation , the particularly precise and delicate tuning and control of the design machines of this part,
  • the skirt comprises an axial end zone which comprises the free end and which is offset radially towards the inside of the body, the piston comprising an annular groove in which the end zone is arranged in sealing contact in the rest position.

L'invention vise également à permettre la réalisation simple d'une gamme de pompes dans laquelle les pompes présentant des composants, des matériaux, des caractéristiques techniques et un fonctionnement analogues peuvent distribuer des doses de produit fluide de volume différent.The invention also aims to allow the simple realization of a range of pumps in which pumps having similar components, materials, technical characteristics and operation can dispense doses of fluid of different volume.

A cet effet, l'invention propose également une gamme de pompes comprenant au moins des première et deuxième pompes telles que définies ci-dessus, lesdites première et deuxième pompes étant adaptées pour distribuer des doses de produit fluide présentant respectivement des premier et deuxième volumes différents, les butées de fin de course respectives de l'organe d'extrémité des première et deuxième pompes étant situées respectivement à des première et deuxième distances de l'orifice d'admission, lesdites première et deuxième distances étant différentes l'une de l'autreFor this purpose, the invention also proposes a range of pumps comprising at least first and second pumps as defined above, said first and second pumps being adapted to dispense doses of fluid product respectively having first and second different volumes. the respective end stops of the end member of the first and second pumps being located respectively at first and second distances from the inlet, said first and second distances being different from one of the other

Chaque pompe d'une telle gamme est adaptée pour distribuer une dose de produit fluide d'un volume déterminé. L'organe d'extrémité forme un module unique permettant le réglage du volume de la dose à distribuer de sorte à réduire le nombre d'opérations de fabrication et à limiter l'adaptation des machines de conception pour pouvoir faire varier les volumes de la dose à distribuer par les pompes d'une même gamme.Each pump of such a range is adapted to dispense a dose of fluid product of a determined volume. The end member forms a single module for adjusting the volume of the dose to be dispensed. so as to reduce the number of manufacturing operations and to limit the adaptation of the design machines to be able to vary the volumes of the dose to be dispensed by the pumps of the same range.

D'autres objets et avantages de l'invention apparaîtront à la lecture de la description qui suit, faite en référence aux dessins annexés dans lesquels :

  • la figure 1 est une représentation en coupe longitudinale d'une pompe dans une position de repos selon un mode de réalisation de l'invention, ladite pompe étant adaptée pour distribuer une dose de produit fluide présentant un premier volume,
  • la figure 2 est une représentation en coupe longitudinale de la pompe de la figure 1 dans une position de fin de course,
  • la figure 3 est une représentation en coupe longitudinale d'une pompe analogue à celle de la figure 1 dans la position de repos, ladite pompe étant adaptée pour distribuer une dose de produit fluide présentant un deuxième volume différent du premier volume,
  • la figure 4 est une représentation en coupe longitudinale de la pompe de la figure 3, dans la position de fin de course.
Other objects and advantages of the invention will appear on reading the description which follows, made with reference to the appended drawings in which:
  • the figure 1 is a representation in longitudinal section of a pump in a rest position according to one embodiment of the invention, said pump being adapted to dispense a dose of fluid product having a first volume,
  • the figure 2 is a representation in longitudinal section of the pump of the figure 1 in an end position,
  • the figure 3 is a representation in longitudinal section of a pump similar to that of the figure 1 in the rest position, said pump being adapted to dispense a dose of fluid having a second volume different from the first volume,
  • the figure 4 is a representation in longitudinal section of the pump of the figure 3 , in the end position.

Sur les figures, les mêmes références désignent des éléments identiques ou analogues.In the figures, the same references designate identical or similar elements.

Sur les figures, on représente un mode de réalisation particulier d'une pompe permettant de distribuer une dose de produit fluide, liquide ou visqueux, par exemple du domaine de la parfumerie, de la pharmacie, de la cosmétique ou autre.In the figures, there is shown a particular embodiment of a pump for dispensing a dose of fluid, liquid or viscous product, for example from the field of perfumery, pharmacy, cosmetics or other.

La pompe peut appartenir à une gamme de pompes dans laquelle des pompes, présentant des composants, des matériaux, des caractéristiques techniques et un fonctionnement analogues, sont adaptées pour distribuer des doses de produit fluide présentant des volumes différents.The pump may belong to a range of pumps in which pumps, having similar components, materials, technical characteristics and operation, are adapted to dispense fluid doses having different volumes.

La pompe comprend :

  • un corps 1 tubulaire s'étendant selon un axe central A entre une première 3 et une deuxième 4 extrémités et comportant un orifice d'admission 6 du produit fluide au voisinage de la première extrémité 3,
  • un organe de compression monté mobile à l'intérieur du corps 1 selon une course axiale entre une position de repos, éloignée de l'orifice d'admission 6 (figures 1 et 3), et une position de fin de course, rapprochée de l'orifice d'admission 6 (figures 2 et 4), l'organe de compression comprenant un orifice d'échappement.
The pump includes:
  • a tubular body 1 extending along a central axis A between a first 3 and a second 4 ends and having an inlet 6 for the fluid in the vicinity of the first end 3,
  • a compression member movably mounted inside the body 1 in an axial stroke between a rest position, remote from the inlet orifice 6 ( figures 1 and 3 ), and an end position, close to the inlet port 6 ( figures 2 and 4 ), the compression member comprising an exhaust port.

La pompe est destinée à être disposée par la première extrémité 3 du corps 1 dans une ouverture d'un réservoir, non représenté, et fixée de façon connue en soi, par exemple par emmanchement et/ou au moyen d'un organe de fixation, au réservoir de sorte à pouvoir prélever une dose de produit fluide contenu dans le réservoir.The pump is intended to be arranged by the first end 3 of the body 1 in an opening of a tank, not shown, and fixed in a known manner, for example by fitting and / or by means of a fastener, to the reservoir so that it can take a dose of fluid contained in the reservoir.

Dans la suite de la description, les termes « supérieur » ou « haut » et « inférieur » ou « bas » seront compris par rapport à des localisations situées respectivement à proximité de la deuxième extrémité 4 du corps 1 et à proximité de la première extrémité 3 du corps 1. Par ailleurs, les termes « axial » ou « longitudinal » et « radial » ou « transversal » font référence à des plans respectivement parallèle et perpendiculaire à l'axe central A.In the remainder of the description, the terms "upper" or "high" and "lower" or "low" will be understood with respect to locations located respectively close to the second end 4 of the body 1 and close to the first end. 3 of the body 1. In addition, the terms "axial" or "longitudinal" and "radial" or "transverse" refer to planes respectively parallel and perpendicular to the central axis A.

Le corps 1 et l'organe de compression délimitent une chambre de dosage 2 formée entre l'orifice d'admission 6 et l'orifice d'échappement. L'organe de compression peut alors être déplacé à l'intérieur du corps 1 selon la course de sorte, en faisant varier le volume de la chambre de dosage 2, à pouvoir alternativement faire entrer du produit fluide dans la chambre de dosage 2 par l'orifice d'admission 6 et faire sortir le produit fluide de la chambre de dosage 2 par l'orifice d'échappement.The body 1 and the compression member delimit a metering chamber 2 formed between the inlet port 6 and the exhaust port. The compression member can then be moved inside the body 1 according to the stroke so, by varying the volume of the metering chamber 2, to be able alternately to introduce fluid into the metering chamber 2 by the intake port 6 and make out the fluid from the metering chamber 2 through the exhaust port.

Le corps 1 comporte une paroi latérale 7 annulaire dans laquelle l'organe de compression est monté. La paroi latérale 7 présente une surface intérieure, une surface extérieure, une extrémité inférieure, une extrémité supérieure ouverte comportant un rebord annulaire 5 saillant vers l'extérieur et formant la deuxième extrémité 4 du corps 1.The body 1 has an annular side wall 7 in which the compression member is mounted. The side wall 7 has an inner surface, a surface outer, a lower end, an open upper end having an annular flange 5 protruding outwardly and forming the second end 4 of the body 1.

Un trou traversant formant trou d'évent 8 peut être ménagé dans la paroi latérale 7 de sorte à permettre un passage d'air entre l'extérieur et l'intérieur du réservoir pour compenser la dose de produit fluide prélevé par la pompe.A through hole forming a vent hole 8 may be formed in the side wall 7 so as to allow air passage between the outside and the inside of the tank to compensate for the dose of fluid taken by the pump.

Dans le mode de réalisation particulier représenté, on prévoit que le corps 1 puisse également présenter une paroi inférieure annulaire 9 qui s'étend depuis l'extrémité inférieure de la paroi latérale 7 et dont l'extrémité libre forme la première extrémité 3 du corps 1, c'est-à-dire l'extrémité inférieure.In the particular embodiment shown, it is provided that the body 1 may also have an annular bottom wall 9 which extends from the lower end of the side wall 7 and whose free end forms the first end 3 of the body 1 that is, the lower end.

La paroi inférieure 9 comporte intérieurement l'orifice d'admission 6 et un clapet d'admission, par exemple un clapet à bille comprenant une bille 10 et un siège 11, adapté pour permettre l'obturation sélective de l'orifice d'admission 6, c'est-à-dire son ouverture, la bille 10 étant écartée du siège 11, ou sa fermeture, la bille 10 reposant sur le siège 11. Des organes de butée 12 peuvent être prévus en regard et à distance du siège 11 pour former une cage limitant les déplacements de la bille 10.The bottom wall 9 internally comprises the inlet port 6 and an inlet valve, for example a ball valve comprising a ball 10 and a seat 11, adapted to allow the selective sealing of the inlet port 6 , that is to say its opening, the ball 10 being spaced from the seat 11, or its closure, the ball 10 resting on the seat 11. The abutment members 12 may be provided opposite and away from the seat 11 to form a cage limiting the movements of the ball 10.

La paroi inférieure 9 peut par exemple recevoir par emmanchement un tube plongeur, non représenté, permettant de mettre en communication la chambre de dosage avec le réservoir.The bottom wall 9 may for example receive by fitting a dip tube, not shown, for communicating the metering chamber with the reservoir.

L'invention n'est toutefois pas limitée notamment à un corps 1 ou un clapet d'admission tels que décrits ci-dessus. Par exemple, le corps 1 peut être dépourvu de paroi inférieure 9, l'extrémité inférieure de la paroi latérale 7 formant la première extrémité 3 du corps 1, ou comprendre une paroi intérieure entourée par la paroi latérale 7, le clapet d'admission et l'orifice d'admission 6 étant adaptés en conséquence.The invention is however not limited in particular to a body 1 or an intake valve as described above. For example, the body 1 may be devoid of bottom wall 9, the lower end of the side wall 7 forming the first end 3 of the body 1, or comprise an inner wall surrounded by the side wall 7, the inlet valve and the inlet port 6 being adapted accordingly.

La pompe comprend en outre un organe d'extrémité 14 présentant une ouverture centrale et associé à l'extrémité supérieure 4 du corps 1.The pump further comprises an end member 14 having a central opening and associated with the upper end 4 of the body 1.

Pour fermer l'extrémité supérieure 4 du corps 1 et permettre le guidage de l'organe de distribution en translation selon l'axe central A, l'organe d'extrémité 14 peut comporter une paroi tubulaire qui s'étend selon l'axe central A. L'organe d'extrémité 14 présente alors une surface extérieure et une surface intérieure qui délimite l'ouverture centrale.To close the upper end 4 of the body 1 and allow the guide of the translation member in translation along the central axis A, the end member 14 may comprise a tubular wall which extends along the central axis A. The end member 14 then has an outer surface and an inner surface which delimits the central opening.

En particulier, la paroi tubulaire de l'organe d'extrémité 14 peut former une jupe 14a tubulaire inférieure emmanchée à l'intérieur du corps 1. La surface extérieure de la jupe 14a peut alors être disposée au moins localement en contact avec la surface intérieure de la paroi latérale 7 du corps 1. Par exemple, un jonc annulaire 28 peut être prévu sur la surface extérieure de la jupe 14a pour venir en contact avec la surface intérieure du corps 1 et permettre la fixation de l'organe d'extrémité 14 à l'intérieur du corps 1. Par ailleurs, un épaulement 15 saillant radialement vers l'extérieur peut être prévu à une extrémité de la jupe 14a pour reposer sur le rebord 5 du corps 1.In particular, the tubular wall of the end member 14 can form a lower tubular skirt 14a fitted inside the body 1. The outer surface of the skirt 14a can then be arranged at least locally in contact with the inner surface of the side wall 7 of the body 1. For example, an annular ring 28 may be provided on the outer surface of the skirt 14a to come into contact with the inner surface of the body 1 and allow the attachment of the end member 14 inside the body 1. Furthermore, a shoulder 15 protruding radially outwardly can be provided at one end of the skirt 14a to rest on the flange 5 of the body 1.

La jupe 14a peut alors présenter une extrémité libre 37, à l'opposé de l'épaulement 15, qui peut être écartée de la surface intérieure du corps 1. En particulier, la jupe 14a peut comporter une zone extrême 38 axiale qui comprend l'extrémité libre 37 et qui est décalée radialement par rapport à l'axe central A vers l'intérieur du corps 1. Un espace annulaire peut ainsi être formé entre la surface intérieure du corps 1 et la surface extérieure de la zone extrême 38 de la jupe 14a.The skirt 14a may then have a free end 37, opposite the shoulder 15, which may be spaced from the inner surface of the body 1. In particular, the skirt 14a may comprise an axial end zone 38 which comprises the free end 37 and which is offset radially with respect to the central axis A towards the interior of the body 1. An annular space can thus be formed between the inner surface of the body 1 and the outer surface of the end zone 38 of the skirt 14a.

Pour faciliter l'introduction de la jupe 14a de l'organe d'extrémité 14, la surface intérieure de la paroi latérale 7 du corps 1 peut être adaptée et, par exemple, présenter une partie élargie à l'extrémité supérieure 4 et une partie restreinte contre laquelle la jupe 14a est emmanchée, une portion inclinée joignant les deux parties.To facilitate the introduction of the skirt 14a of the end member 14, the inner surface of the side wall 7 of the body 1 can be adapted and, for example, have an enlarged part at the upper end 4 and a restricted portion against which the skirt 14a is fitted, an inclined portion joining the two parts.

Dans d'autres modes de réalisation, on peut prévoir d'associer l'organe d'extrémité 14 à la deuxième extrémité 4 du corps 1 par tout autre moyen et l'organe d'extrémité 14 peut être associé à la surface extérieure de la paroi latérale 7 du corps 1.In other embodiments, it is possible to associate the end member 14 with the second end 4 of the body 1 by any other means and the end member 14 can be associated with the outer surface of the side wall 7 of the body 1.

Sur les figures, la paroi tubulaire de l'organe d'extrémité 14 peut également former un manchon 14b tubulaire supérieur qui fait saillie par rapport à l'extrémité supérieure 4 du corps 1.In the figures, the tubular wall of the end member 14 may also form an upper tubular sleeve 14b which protrudes with respect to the upper end 4 of the body 1.

L'organe de compression comprend :

  • un gicleur 20 s'étendant dans l'ouverture centrale de l'organe d'extrémité 14,
  • un piston 25 coulissant à l'intérieur du corps 1.
The compression member comprises:
  • a nozzle 20 extending into the central opening of the end member 14,
  • a piston 25 sliding inside the body 1.

Dans le mode de réalisation représenté, le gicleur 20 peut comprendre un tube d'actionnement 21 axial allongé qui délimite un conduit de sortie pour le produit fluide depuis la chambre de dosage 2 vers l'extérieur.In the embodiment shown, the nozzle 20 may comprise an elongated axial actuating tube 21 which delimits an outlet duct for the fluid product from the metering chamber 2 to the outside.

Le tube d'actionnement 21 s'étend à l'intérieur de l'organe d'extrémité 14 et comprend une extrémité inférieure ouverte, disposée à l'intérieur du corps 1 et située à proximité de l'orifice d'admission 6, et une extrémité supérieure ouverte, située à distance de l'orifice d'admission 6 et saillante par rapport à l'extrémité supérieure 4 du corps 1.The actuating tube 21 extends inside the end member 14 and comprises an open bottom end disposed inside the body 1 and located near the inlet port 6, and an open upper end, located at a distance from the inlet orifice 6 and protruding with respect to the upper end 4 of the body 1.

L'extrémité supérieure du tube d'actionnement 21 peut être adaptée pour permettre la fixation d'un organe d'actionnement, tel qu'un poussoir non représenté, sur lequel un utilisateur peut exercer une pression pour actionner la pompe en déplaçant le gicleur 20 depuis la position de repos vers la position de fin de course.The upper end of the actuating tube 21 may be adapted to allow the attachment of an actuator, such as a pusher not shown, on which a user can exert pressure to actuate the pump by moving the nozzle 20 from the home position to the end position.

En outre, on prévoit que le gicleur 20 soit rappelé élastiquement vers la position de repos.In addition, it is expected that the nozzle 20 is resiliently biased towards the rest position.

Pour ce faire, le tube d'actionnement 21 peut présenter une bordure 23 annulaire qui s'étend radialement vers l'extérieur. Un organe élastique, par exemple un ressort de compression 17, peut alors s'étendre entre la bordure 23 du tube d'actionnement 21 et une saillie radiale 16 qui s'étend depuis la surface intérieure de l'organe d'extrémité 14 vers l'intérieur, sensiblement à l'opposé du jonc 28.To do this, the actuating tube 21 may have an annular rim 23 which extends radially outwards. An elastic member, for example a compression spring 17, can then extend between the edge 23 of the actuating tube 21 and a radial projection 16 which extends from the inner surface of the end member 14 inward, substantially to the opposite of the ring 28.

Le ressort de compression 17 ainsi disposé autour du tube d'actionnement 21 à l'extérieur de la chambre de dosage 2 permet d'améliorer la compacité de la pompe et d'éviter le contact entre le produit fluide et le ressort de compression 17. On peut toutefois prévoir, en variante, toute autre disposition adaptée du ressort de compression 17, notamment à l'extérieur de l'organe d'extrémité 14, ou tout autre type d'organe élastique.The compression spring 17 thus disposed around the actuating tube 21 outside the metering chamber 2 improves the compactness of the pump and prevents contact between the fluid and the compression spring 17. However, it is possible to alternatively provide any other suitable arrangement of the compression spring 17, in particular outside the end member 14, or any other type of elastic member.

Pour définir la course axiale de l'organe de compression, la pompe présente en outre .

  • une butée de repos contre laquelle l'organe de compression est en butée en position de repos, comme représenté sur les figures 1 et 3, et
  • une butée de fin de course contre laquelle l'organe de compression est en butée en position de fin de course, comme représenté sur les figures 2 et 4.
To define the axial stroke of the compression member, the pump also has.
  • a rest stop against which the compression member is in abutment in the rest position, as shown in the figures 1 and 3 , and
  • an end stop against which the compression member is in abutment in the end position, as shown in FIG. figures 2 and 4 .

On prévoit, en particulier, que l'organe d'extrémité 14 comporte la butée de repos et la butée de fin de course.In particular, the end member 14 includes the rest stop and the end stop.

On peut notamment prévoir que l'extrémité libre 37 de la jupe 14a forme la butée de repos contre laquelle le piston 25 est directement en butée en position de repos de l'organe de compression.It may in particular be provided that the free end 37 of the skirt 14a forms the rest stop against which the piston 25 is directly in abutment in the rest position of the compression member.

Par ailleurs, la butée de fin de course peut être ménagée, par exemple sous la forme d'un épaulement 39, sur la surface intérieure de l'organe d'extrémité 14. Le gicleur 20 peut alors être adapté pour être en butée directement contre l'épaulement 39 en position de fin de course. L'épaulement 39 constitue une saillie annulaire sur la surface intérieure de la paroi tubulaire de l'organe d'extrémité.Furthermore, the end stop can be formed, for example in the form of a shoulder 39, on the inner surface of the end member 14. The nozzle 20 can then be adapted to abut directly against the shoulder 39 in the end position. The shoulder 39 is an annular projection on the inner surface of the tubular wall of the end member.

La butée de repos est alors située entre la butée de fin de course et l'extrémité inférieure 3 du corps. La course axiale de l'organe de compression est définie par la différence entre, d'une part, la distance des parties du piston 25 et du gicleur 20 destinées à venir en butée sur les butées de repos et de fin de course et, d'autre part, la distance entre l'extrémité libre 37 et l'épaulement 39 de l'organe d'extrémité 14.The rest stop is then located between the limit stop and the lower end 3 of the body. The axial stroke of the compression member is defined by the difference between, on the one hand, the distance of the parts of the piston 25 and the nozzle 20 intended to abut on the stops of rest and end of stroke and, d ' on the other hand, the distance between the free end 37 and the shoulder 39 of the end member 14.

Afin de pouvoir disposer d'un même encombrement de l'organe d'extrémité 14 ainsi que d'une hauteur de jupe 14a identique quel que soit le volume de la dose à distribuer, on peut prévoir que les butées de repos et de fin de course soient situées respectivement à des première d1 et deuxième d2 distances de l'orifice d'admission 6, la première distance d1 étant fixe quel que soit le volume de la dose à distribuer et la deuxième distance d2 étant adaptée pour être modulée de sorte à définir un volume pour la dose.In order to be able to have the same size of the end member 14 as well as an identical skirt height 14a irrespective of the volume of the dose to be dispensed, it is possible for the rest and end stops of stroke are located respectively at first d1 and second d2 distances from the inlet port 6, the first distance d1 being fixed regardless of the volume of the dose to be dispensed and the second distance d2 being adapted to be modulated so as to set a volume for the dose.

Toutes les pompes d'une même gamme distribuant des doses de volumes différents peuvent ainsi présenter une même position de repos, ce qui simplifie la réalisation des organes d'habillage de la partie supérieure de la pompe et d'actionnement qui peuvent être les mêmes pour toutes les pompes. En outre, l'extrémité libre 37 de la jupe 14a peut être adaptée notamment pour réaliser une étanchéité entre le piston 25 et l'organe d'extrémité 14, en position de repos, sans avoir à être modifiée et mise au point d'une pompe à l'autre.All pumps of the same range distributing doses of different volumes can thus have the same rest position, which simplifies the realization of the bodies of dressing of the upper part of the pump and can be the same for all the pumps. In addition, the free end 37 of the skirt 14a may be adapted in particular to provide a seal between the piston 25 and the end member 14, in the rest position, without having to be modified and developed in a pump to the other.

Par exemple, sur les figures 1 et 2, on représente une première pompe adaptée pour distribuer des doses de produit fluide présentant un premier volume. L'extrémité libre 37 de l'organe d'extrémité 14 est située à une distance d1 de l'orifice d'admission 6 et l'épaulement 39 est situé à une distance d2 de l'orifice d'admission 6. L'épaulement 39 peut alors se trouver sur la surface intérieure de la jupe 14a.For example, on Figures 1 and 2 , there is shown a first pump adapted to dispense doses of fluid product having a first volume. The free end 37 of the end member 14 is located at a distance d1 from the inlet port 6 and the shoulder 39 is located at a distance d2 from the inlet port 6. The shoulder 39 can then be on the inner surface of the skirt 14a.

Et sur les figures 3 et 4, une deuxième pompe appartenant à la même gamme que la première pompe est adaptée pour distribuer des doses de produit fluide présentant un deuxième volume différent du premier volume, par exemple inférieur au premier volume. L'extrémité libre 37 de l'organe d'extrémité 14 est située à la même distance d1 de l'orifice d'admission 6 que celle la première pompe mais l'épaulement 39 est situé à une distance d2' de l'orifice d'admission 6 différente, par exemple supérieure, de celle de la première pompe. L'épaulement 39 peut alors se trouver sur la surface intérieure du manchon 14b.And on the Figures 3 and 4 a second pump belonging to the same range as the first pump is adapted to dispense doses of fluid product having a second volume different from the first volume, for example, less than the first volume. The free end 37 of the end member 14 is situated at the same distance d1 from the inlet orifice 6 as the first pump but the shoulder 39 is located at a distance d2 'from the orifice d different admission 6, for example greater than that of the first pump. The shoulder 39 can then be on the inner surface of the sleeve 14b.

Pour assurer le guidage en translation selon l'axe central A du tube d'actionnement 21, le tube d'actionnement 21 peut comprendre une collerette 19 qui s'étend axialement depuis l'extrémité libre de la bordure 23 du tube d'actionnement 21 pour pouvoir être en butée contre l'épaulement 39 annulaire en position de fin de course. En position de fin de course, l'appui de la collerette 19 sur l'épaulement 39 peut ainsi être réparti de manière uniforme sur une zone annulaire de l'organe d'extrémité 14. Le tube d'actionnement 21 est maintenu selon l'axe A ce qui assure un appui réparti entre le piston 25 et le corps 1.To ensure translation guidance along the central axis A of the actuating tube 21, the actuating tube 21 may comprise a collar 19 which extends axially from the free end of the rim 23 of the actuating tube 21 to be in abutment against the annular shoulder 39 in the end position. In the end-of-travel position, the support of the flange 19 on the shoulder 39 can thus be evenly distributed over an annular zone of the end member 14. The actuating tube 21 is held in accordance with FIG. axis A which ensures a distributed support between the piston 25 and the body 1.

La collerette 19 qui entoure une partie du tube d'actionnement 21 présente une dimension transversale extérieure sensiblement égale ou inférieure à la dimension transversale intérieure d'une partie de la surface intérieure de l'organe d'extrémité 14 de sorte à être mobile, notamment conjointement avec le tube d'actionnement 21, dans l'organe d'extrémité 14 en regard de la surface intérieure dudit organe d'extrémité 14.The flange 19 surrounding a portion of the actuating tube 21 has an external transverse dimension substantially equal to or less than the internal transverse dimension of a portion of the inner surface of the end member 14 so as to be movable, in particular together with the actuating tube 21, in the end member 14 facing the inner surface of said end member 14.

Dans le mode de réalisation représenté, la collerette 19 est venue de matière avec le tube d'actionnement 21. En variante, on peut toutefois prévoir que la collerette 19 et/ou la bordure 23 soient rapportées. D'autre part, on peut également prévoir que la position sur le gicleur 20 et/ou la longueur de la collerette 19 soient également modulables pour pouvoir faire varier la course de l'organe de compression et le volume de la dose de produit fluide à distribuer.In the embodiment shown, the flange 19 is integrally formed with the actuating tube 21. In a variant, provision may however be made for the flange 19 and / or the rim 23 to be attached. On the other hand, it can also be provided that the position on the nozzle 20 and / or the length of the flange 19 are also adjustable to be able to vary the stroke of the compression member and the volume of the dose of fluid product to distribute.

Par ailleurs, on prévoit, sur les figures, que le gicleur 20 puisse également comprendre un insert 22 allongé assemblé au tube d'actionnement 21. L'insert 22 peut comporter une base 30 qui s'étend globalement transversalement par rapport à l'axe central A et qui est disposée à l'intérieur de la chambre de dosage 2 en regard de l'orifice d'admission 6. Par exemple, la base 30 peut présenter une concavité tournée vers le haut et comprendre une partie centrale 31 et une collerette 32 périphérique tronconique s'évasant vers le haut.Furthermore, it is provided in the figures that the nozzle 20 may also comprise an insert 22 elongate assembled to the actuating tube 21. The insert 22 may comprise a base 30 which extends generally transversely with respect to the central axis A and which is disposed inside the metering chamber 2 opposite the intake port 6. For example, the base 30 may have a concavity facing upwards and comprise a central portion 31 and a frustoconical peripheral flange 32 flaring upwards.

L'insert 22 et le tube d'actionnement 21 définissent entre eux un ou plusieurs passages, formant l'orifice d'échappement, pour le produit fluide depuis la chambre de dosage 2 vers le conduit de sortie.The insert 22 and the actuating tube 21 define between them one or more passages, forming the exhaust port, for the fluid product from the metering chamber 2 to the outlet duct.

Le piston 25 peut alors être monté coulissant axialement sur le gicleur 20 et comprendre des portées d'étanchéité annulaires adaptées pour venir en contact étanche avec des portées d'étanchéité annulaires formées sur la base 30 et ainsi former un clapet d'échappement 33 obturant sélectivement, lors du coulissement du piston 25 sur le gicleur 20, l'orifice d'échappement.The piston 25 can then be mounted to slide axially on the nozzle 20 and comprise annular sealing surfaces adapted to come into sealing contact with annular sealing surfaces formed on the base 30 and thus form an exhaust valve 33 selectively closing during the sliding of the piston 25 on the nozzle 20, the exhaust port.

Le tube d'actionnement 21 peut présenter, au voisinage de l'extrémité inférieure, une portion extrême 24 de dimension transversale réduite. La portion extrême 24 sur laquelle le piston 25 est monté coulissant peut, par exemple, être délimitée vers le haut par un épaulement ou une portion évasée 18.The actuating tube 21 may have, in the vicinity of the lower end, an end portion 24 of reduced transverse dimension. The end portion 24 on which the piston 25 is slidably mounted may, for example, be delimited upwards by a shoulder or a flared portion 18.

Pour permettre le montage du piston 25 sur le gicleur 20 présentant, d'une part, la bordure 23 et la portion évasée 18 sur le tube d'actionnement 21 et, d'autre part, la base 30 sur l'insert 22, le tube d'actionnement 21 et l'insert 22 peuvent être deux pièces distinctes assemblées après que le piston 25 a été monté sur le tube d'actionnement 21. En particulier, l'insert 22 peut être inséré dans l'extrémité ouverte du tube d'actionnement 21.To enable the piston 25 to be mounted on the nozzle 20 having, on the one hand, the rim 23 and the flared portion 18 on the actuating tube 21 and, on the other hand, the base 30 on the insert 22, the actuating tube 21 and the insert 22 may be two separate pieces assembled after the piston 25 has been mounted on the actuating tube 21. In particular, the insert 22 can be inserted into the open end of the tube actuation 21.

Par ailleurs, la bordure 23 étant venue de matière avec le tube d'actionnement 21, la portion extrême 24 du tube d'actionnement 21 est insérée dans l'organe d'extrémité 14 par l'ouverture centrale du manchon 14b préalablement à l'assemblage du piston 25 et de l'insert 22 et au montage de l'organe d'extrémité 14 sur le corps 1 de la pompe. Comme indiqué précédemment, la bordure 23 et la collerette 19 peuvent toutefois être rapportées, le montage de l'organe d'extrémité 14 pouvant alors être réalisé après l'assemblage du piston 25 et de l'insert 22.Furthermore, the rim 23 being integral with the actuating tube 21, the end portion 24 of the actuating tube 21 is inserted into the end member 14 through the central opening of the sleeve 14b prior to the assembly of the piston 25 and the insert 22 and the mounting of the end member 14 on the body 1 of the pump. As indicated above, the edge 23 and the flange 19 can however be attached, the mounting of the end member 14 can then be performed after the assembly of the piston 25 and the insert 22.

Pour que le positionnement relatif de l'insert 22 et du tube d'actionnement 21 puisse assurer un contact étanche et uniforme entre les portées d'étanchéité de la base 30 et du piston 25 et un appui satisfaisant du piston 25 sur le corps 1 de la pompe, un rotulage peut être ménagé entre l'insert 22 et le tube d'actionnement 21.So that the relative positioning of the insert 22 and the actuating tube 21 can ensure a tight and uniform contact between the sealing faces of the base 30 and the piston 25 and a satisfactory support of the piston 25 on the body 1 of the pump, a swiveling may be provided between the insert 22 and the actuating tube 21.

En particulier, l'insert 22 peut comporter une tige 34 qui s'étend depuis la partie centrale 31 de la base 30 sensiblement perpendiculairement à celle-ci. La tige 34 peut comprendre une extrémité libre, à l'opposé de la base 30, pourvue d'une tête 35 encliquetée sur un rebord annulaire 36 formé à l'intérieur du tube d'actionnement 21, un jeu axial et un jeu transversal étant ménagés entre l'insert 22 et le tube d'actionnement 21.In particular, the insert 22 may comprise a rod 34 which extends from the central portion 31 of the base 30 substantially perpendicular thereto. The rod 34 may comprise a free end, opposite the base 30, provided with a head 35 snapped onto an annular flange 36 formed inside the actuating tube 21, an axial clearance and a transverse clearance being formed between the insert 22 and the actuating tube 21.

Dans d'autres modes de réalisation, l'insert 22 peut comprendre une tige 34 creuse qui délimite une partie inférieure du conduit de sortie et l'orifice d'échappement peut être prévu transversalement sur le tube d'actionnement 21 ou, le cas échéant, sur la tige creuse.In other embodiments, the insert 22 may comprise a hollow rod 34 delimiting a lower portion of the outlet duct and the exhaust orifice may be provided transversely on the actuating tube 21 or, where appropriate , on the hollow stem.

Le piston 25 est adapté pour venir en appui étanche contre la surface intérieure de la paroi latérale 7 du corps 1 et en contact avec les portées d'étanchéité de la base 30.The piston 25 is adapted to bear tightly against the inner surface of the side wall 7 of the body 1 and in contact with the sealing surfaces of the base 30.

En particulier, le piston 25 peut comprendre un manchon central 26 monté coulissant sur la portion extrême 24 du tube d'actionnement 21 entre la portion évasée 18 et la base 30, la distance entre la portion évasée 18 et la base 30 étant adaptée pour obtenir une ouverture suffisante du clapet d'échappement 33. En variante, dans le cas où l'insert 22 comprend une tige 34 creuse, on pourrait prévoir de monter le piston 25 sur l'insert 22.In particular, the piston 25 may comprise a central sleeve 26 slidably mounted on the end portion 24 of the actuating tube 21 between the flared portion 18 and the base 30, the distance between the flared portion 18 and the base 30 being adapted to obtain a sufficient opening of the exhaust valve 33. Alternatively, in the case where the insert 22 comprises a hollow rod 34, it could be provided to mount the piston 25 on the insert 22.

Le manchon central 26 peut présenter une extrémité libre inférieure qui s'étend dans la concavité de la base 30 de sorte à définir les portées d'étanchéité venant en contact avec les portées d'étanchéité de la base 30. Les portées d'étanchéité de la base 30 peuvent ainsi être situées de part et d'autre de l'extrémité libre du manchon 26 pour réaliser une étanchéité améliorée du clapet d'échappement 33.The central sleeve 26 may have a lower free end which extends into the concavity of the base 30 so as to define the sealing surfaces coming into contact with the sealing surfaces of the base 30. The sealing surfaces of the base 30 can thus be located on either side of the free end of the sleeve 26 to provide an improved seal of the exhaust valve 33.

Le piston 25 peut également comprendre une douille 27 annulaire axiale entourant le manchon central 26 et reliée à celui-ci par une paroi sensiblement radiale. La douille 27 peut définir une lèvre supérieure et une lèvre inférieure qui viennent en contact frottant avec la surface intérieure de la paroi latérale 7 du corps 1, le trou d'évent 8 étant disposé entre les lèvres supérieure et inférieure en position de repos.The piston 25 may also comprise an axial annular sleeve 27 surrounding the central sleeve 26 and connected thereto by a substantially radial wall. The sleeve 27 may define an upper lip and a lower lip which come into rubbing contact with the inner surface of the side wall 7 of the body 1, the vent hole 8 being disposed between the upper and lower lips in the rest position.

Pour améliorer l'étanchéité entre l'organe d'extrémité 14 et le piston 25 en position de repos, le piston 25 peut comporter une rainure annulaire 41, formée par exemple entre la lèvre supérieure et le manchon central 26, dans laquelle la zone extrême 38 de la jupe 14a est disposée en contact étanche en position de repos.To improve the seal between the end member 14 and the piston 25 in the rest position, the piston 25 may comprise an annular groove 41, formed for example between the upper lip and the central sleeve 26, in which the extreme zone 38 of the skirt 14a is arranged in sealed contact in the rest position.

En relation avec les figures, on décrit l'actionnement de la pompe par l'utilisateur pour distribuer une dose de produit fluide.In relation to the figures, the actuation of the pump by the user for dispensing a dose of fluid product is described.

En l'absence de sollicitation extérieure, le gicleur 20 sollicité par le ressort de compression 17 est dans sa position de repos (figures 1 et 3). Le piston 25 est en butée contre l'extrémité libre 37 de la jupe 14a de l'organe d'extrémité 14, un contact étanche étant établi entre la zone extrême 38 de la jupe 14a et le piston 25. L'extrémité libre du manchon central 26 repose contre la base 30 pour fermer le clapet d'échappement 33. Par ailleurs, le clapet d'admission est fermé.In the absence of external stress, the nozzle 20 urged by the compression spring 17 is in its rest position ( figures 1 and 3 ). The piston 25 is in abutment against the free end 37 of the skirt 14a of the end member 14, a sealed contact being established between the end zone 38 of the skirt 14a and the piston 25. The free end of the sleeve central 26 rests against the base 30 to close the exhaust valve 33. In addition, the inlet valve is closed.

Dans les modes de réalisation représentés, on prévoit que la force de frottement entre le piston 25 et le corps 1 soit supérieure à la force de frottement entre le piston 25 et le gicleur 20. Lorsque l'utilisateur exerce une pression P, par l'intermédiaire par exemple du poussoir, sur le tube d'actionnement 21, du fait de la différence entre les forces de frottement, le tube d'actionnement 21 coulisse par rapport au piston 25 de sorte à ouvrir le clapet d'échappement 33. Par exemple, le tube d'actionnement 21 peut coulisser par rapport au piston 25 jusqu'à ce que l'extrémité inférieure du tube d'actionnement 21 vienne en butée contre un rétrécissement du manchon central 26 ou jusqu'à ce que l'épaulement ou la portion évasée 18 du tube d'actionnement 21 vienne en butée contre le manchon central 26.In the embodiments shown, it is expected that the frictional force between the piston 25 and the body 1 is greater than the frictional force between the piston 25 and the nozzle 20. When the user exerts a pressure P, for example through the pusher, on the actuating tube 21, because of the difference between the friction forces, the actuating tube 21 slides by relative to the piston 25 so as to open the exhaust valve 33. For example, the actuating tube 21 can slide relative to the piston 25 until the lower end of the actuating tube 21 abuts against a narrowing of the central sleeve 26 or until the shoulder or the flared portion 18 of the actuating tube 21 abuts against the central sleeve 26.

Ensuite, le déplacement du tube d'actionnement 21 entraîne le déplacement du piston 25 vers l'orifice d'admission 6. Le déplacement du gicleur 20 peut être poursuivi jusqu'à ce que la collerette 19 vienne en butée contre l'épaulement 39 annulaire. L'organe de compression atteint la position de fin de course (figures 2 et 4), le clapet d'admission étant alors fermé.Then, the displacement of the actuating tube 21 causes the piston 25 to move towards the inlet orifice 6. The displacement of the nozzle 20 can be continued until the flange 19 comes into abutment against the annular shoulder 39 . The compression member reaches the end position ( figures 2 and 4 ), the inlet valve being closed.

Lorsque l'utilisateur relâche la pression P sur le poussoir, le ressort de compression 17 sollicite le tube d'actionnement 21 vers la position éloignée et, du fait de la différence des forces de frottement, le tube d'actionnement 21 coulisse par rapport au piston 25 jusqu'à ce que le manchon central 26 vienne en contact avec la base 30 et ferme le clapet d'échappement 33. Ensuite, la remontée du gicleur 20 s'accompagne de la remontée du piston 25 dans le corps 1 et donc d'une augmentation du volume de la chambre de dosage 2. Une dépression est créée dans la chambre de dosage 2, ce qui provoque l'ouverture du clapet d'admission, la bille 10 étant décalée par rapport au siège 11, et une aspiration du produit dans la chambre de dosage 2.When the user releases the pressure P on the pusher, the compression spring 17 urges the actuating tube 21 towards the remote position and, because of the difference in the friction forces, the actuating tube 21 slides relative to the piston 25 until the central sleeve 26 comes into contact with the base 30 and closes the exhaust valve 33. Then, the rise of the nozzle 20 is accompanied by the raising of the piston 25 in the body 1 and therefore d an increase in the volume of the metering chamber 2. A depression is created in the metering chamber 2, which causes the opening of the intake valve, the ball 10 being offset relative to the seat 11, and a suction of the produced in the dosing chamber 2.

Dans d'autres modes de réalisation, on pourrait prévoir de commander l'ouverture et la fermeture du clapet d'échappement 33 à l'aide d'un organe élastique tel qu'un ressort de pré-compression, notamment en présence d'un produit fluide de basse viscosité, ce ressort étant en appui haut d'une part sur le gicleur 20, par exemple contre un épaulement, et d'autre part en appui bas contre le piston 25, et ce afin qu'il soit nécessaire qu'une certaine pression soit atteinte dans la chambre de dosage 2 pour que le clapet d'échappement 33 s'ouvre.In other embodiments, it would be possible to control the opening and closing of the exhaust valve 33 by means of an elastic member such as a pre-compression spring, particularly in the presence of a fluid product of low viscosity, this spring being in high support on the one hand on the nozzle 20, for example against a shoulder, and on the other hand in a low support against the piston 25, so that it is necessary that a certain pressure is reached in the metering chamber 2 so that the exhaust valve 33 opens.

Dans une phase d'amorçage, le déplacement du gicleur 20 de la position de repos vers la position de fin de course permet, lorsque la chambre de dosage 2 est remplie d'air, avant la première utilisation, de chasser l'air pour le remplacer par du produit fluide.In a priming phase, the displacement of the nozzle 20 from the rest position to the end position allows, when the metering chamber 2 is filled with air, before the first use, to expel air for the replace with fluid.

Pour assurer un amorçage rapide de la pompe et améliorer les capacités d'aspiration de la pompe, la base 30 présente un organe de remplissage 40, par exemple venu de matière avec l'extrémité libre de la collerette 32. L'organe de remplissage 40 peut être adapté pour occuper un volume mort de la chambre de dosage 2, par exemple entre le manchon central 26 et la douille 27. On peut également prévoir que l'organe de remplissage 40 soit adapté pour venir en appui contre la surface intérieure de la douille 27 en position de repos pour améliorer l'étanchéité de la pompe.To ensure rapid priming of the pump and improve the suction capabilities of the pump, the base 30 has a filling member 40, for example integral with the free end of the flange 32. The filling member 40 can be adapted to occupy a dead volume of the metering chamber 2, for example between the central sleeve 26 and the sleeve 27. It can also be provided that the filling member 40 is adapted to bear against the inner surface of the sleeve 27 in the rest position to improve the sealing of the pump.

Claims (5)

Pompe pour distribuer une dose de produit fluide, comprenant : - un corps (1) tubulaire s'étendant selon un axe central (A) entre une première (3) et une deuxième (4) extrémités et comportant un orifice d'admission (6) au voisinage de la première extrémité (3), - un organe d'extrémité (14) présentant une ouverture centrale et associé à la deuxième extrémité (4) du corps (1), l'organe d'extrémité (14) comportant une paroi tubulaire qui s'étend selon l'axe central (A) et qui présente une surface extérieure et une surface intérieure, l'organe d'extrémité (14) comportant une butée de repos (37) et une butée de fin de course (39), - un organe de compression monté mobile à l'intérieur du corps (1) selon une course axiale entre une position de repos, éloignée de l'orifice d'admission (6) et dans laquelle ledit organe de compression est en butée contre la butée de repos (37), et une position de fin de course, rapprochée de l'orifice d'admission (6) et dans laquelle ledit organe de compression est en butée contre la butée de fin de course (39), ledit organe de compression étant rappelé élastiquement vers la position de repos et comprenant un gicleur (20) s'étendant dans l'ouverture centrale de l'organe d'extrémité (14), un piston (25) coulissant à l'intérieur du corps (1) et un orifice d'échappement, - une chambre de dosage (2) formée entre l'orifice d'admission (6) et l'orifice d'échappement et délimitée par le corps (1) et l'organe de compression, - un clapet d'admission et un clapet d'échappement (33) adaptés pour obturer sélectivement respectivement l'orifice d'admission (6) et l'orifice d'échappement, ladite pompe étant caractérisée en ce que la butée de fin de course (39) est formée par un épaulement ménagé sur la surface intérieure de l'organe d'extrémité (14), le gicleur (20) comprenant une collerette (19) mobile dans l'organe d'extrémité (14) en regard de la surface intérieure dudit organe d'extrémité (14), la collerette (19) étant adaptée pour être en butée contre l'épaulement (39) en position de fin de course.Pump for dispensing a dose of fluid, comprising: a tubular body (1) extending along a central axis (A) between a first (3) and a second (4) end and comprising an inlet (6) in the vicinity of the first end (3), - an end member (14) having a central opening and associated with the second end (4) of the body (1), the end member (14) having a tubular wall which extends along the central axis (A) having an outer surface and an inner surface, the end member (14) having a rest stop (37) and an end stop (39), a compression member mounted movably inside the body (1) in an axial stroke between a rest position, remote from the inlet orifice (6) and in which the said compression member abuts against the stop resting device (37), and a limit position close to the inlet orifice (6) and in which the said compression member is in abutment with the limit stop (39), the said compression member being elastically biased towards the rest position and comprising a nozzle (20) extending into the central opening of the end member (14), a piston (25) sliding inside the body (1) and an exhaust port, a metering chamber (2) formed between the inlet orifice (6) and the exhaust orifice and delimited by the body (1) and the compression member, an intake valve and an exhaust valve (33) adapted to selectively close the inlet orifice (6) and the exhaust orifice respectively, said pump being characterized in that the end stop (39) is formed by a shoulder formed on the inner surface of the end member (14), the nozzle (20) comprising a collar (19) movable in the end member (14) facing the inner surface of said end member (14), the collar (19) being adapted to abut against the shoulder (39) in the end position. Pompe selon la revendication 1, dans laquelle le gicleur (20) est adapté pour être en butée directement contre la butée de fin de course (39) en position de fin de course.Pump according to claim 1, wherein the nozzle (20) is adapted to abut directly against the limit stop (39) in the end position. Pompe selon la revendication 1 ou 2, dans laquelle l'organe d'extrémité (14) comporte une jupe (14a) tubulaire emmanchée à l'intérieur du corps (1) et présentant une extrémité libre (37) qui forme la butée de repos, le piston (25) étant en butée directement contre l'extrémité libre (37) de la jupe (14a) en position de repos.Pump according to claim 1 or 2, wherein the end member (14) comprises a tubular skirt (14a) fitted inside the body (1) and having a free end (37) which forms the rest stop , the piston (25) being in abutment directly against the free end (37) of the skirt (14a) in the rest position. Pompe selon la revendication 3, dans laquelle la jupe (14a) comporte une zone extrême (38) axiale qui comprend l'extrémité libre (37) et qui est décalée radialement vers l'intérieur du corps (1), le piston (25) comportant une rainure (41) annulaire dans laquelle la zone extrême (38) est disposée en contact étanche en position de repos.Pump according to Claim 3, in which the skirt (14a) has an axial end zone (38) which comprises the free end (37) and which is offset radially towards the inside of the body (1), the piston (25). having an annular groove (41) in which the end zone (38) is arranged in sealing contact in the rest position. Gamme de pompes comprenant au moins des première et deuxième pompes selon l'une quelconque des revendications 1 à 4, lesdites première et deuxième pompes étant adaptées pour distribuer des doses de produit fluide présentant respectivement des premier et deuxième volumes différents, les butées de fin de course (39) respectives de l'organe d'extrémité (14) des première et deuxième pompes étant situées respectivement à des première et deuxième distances (d2, d2') de l'orifice d'admission (6), lesdites première et deuxième distances étant différentes l'une de l'autre.A range of pumps comprising at least first and second pumps according to any one of claims 1 to 4, said first and second pumps being adapted to dispense doses of fluid product respectively having first and second different volumes, the end stops of respective stroke (39) of the end member (14) of the first and second pumps being respectively at first and second distances (d2, d2 ') of the inlet port (6), said first and second distances are different from each other.
EP07122890.2A 2007-01-23 2007-12-11 Pump for dispensing a dose of a liquid product and range including such pumps Active EP1949973B1 (en)

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FR0700462A FR2911640B1 (en) 2007-01-23 2007-01-23 PUMP FOR DISPENSING A DOSE OF FLUID PRODUCT AND RANGE COMPRISING SUCH PUMPS.

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ES2535833T3 (en) 2015-05-18
BRPI0800968A8 (en) 2015-04-07
BRPI0800968B1 (en) 2020-09-24
BRPI0800968A2 (en) 2009-02-10
CN101229534B (en) 2013-08-07
US20080210713A1 (en) 2008-09-04
CN101229534A (en) 2008-07-30
US7954677B2 (en) 2011-06-07
FR2911640A1 (en) 2008-07-25
EP1949973B1 (en) 2015-02-11
FR2911640B1 (en) 2012-09-21

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