EP1606192A1 - Product distributor comprising a pump operated by a plunger - Google Patents

Product distributor comprising a pump operated by a plunger

Info

Publication number
EP1606192A1
EP1606192A1 EP04722848A EP04722848A EP1606192A1 EP 1606192 A1 EP1606192 A1 EP 1606192A1 EP 04722848 A EP04722848 A EP 04722848A EP 04722848 A EP04722848 A EP 04722848A EP 1606192 A1 EP1606192 A1 EP 1606192A1
Authority
EP
European Patent Office
Prior art keywords
piston
pump body
pusher
reservoir
chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04722848A
Other languages
German (de)
French (fr)
Other versions
EP1606192B1 (en
Inventor
Jean-Louis Bougamont
Maurice Petitjean
Pierre Dumont
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=32947203&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1606192(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Rexam Dispensing Systems SAS filed Critical Rexam Dispensing Systems SAS
Publication of EP1606192A1 publication Critical patent/EP1606192A1/en
Application granted granted Critical
Publication of EP1606192B1 publication Critical patent/EP1606192B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1001—Piston pumps
    • B05B11/1023—Piston pumps having an outlet valve opened by deformation or displacement of the piston relative to its actuating stem
    • B05B11/1026—Piston pumps having an outlet valve opened by deformation or displacement of the piston relative to its actuating stem the piston being deformable and its deformation allowing opening of the outlet
    • 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
    • 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

  • Product dispenser including push-button pump
  • the invention relates to a dispenser for a liquid or slightly pasty product, essentially consisting of a reservoir and a push-button actuated pump, said pump being forced into the reservoir.
  • the invention applies more particularly to the field of distribution of cosmetic products. It targets in particular a cream or gel dispenser for cosmetic use.
  • the invention can also be applied to a sprayer designed to contain a dose of a luxury product such as for example a perfume.
  • the dispenser is equipped with a spray nozzle.
  • Such distributors or sprayers when they are miniature are mainly intended to be distributed free of charge to customers, to publicize and appreciate the products they contain.
  • the document FR 2 740 118 describes a device in which a pumping chamber containing the entire product is defined. This chamber is directly defined between the reservoir and a piston. The device does not make it possible to dose the quantity extracted.
  • a liquid product dispenser in particular a sprayer, generally comprising a reservoir and a pusher pump installed in this reservoir.
  • the pump comprises a pump body in which a piston is mounted.
  • a liquid metering chamber is defined in the pump body and the piston forms a movable wall of this chamber.
  • An intake valve establishes communication between the metering chamber and the reservoir containing the liquid to be sprayed and an exhaust valve establishes communication between the metering chamber and means for dispensing the product.
  • a spring biases the piston towards a predetermined relaxed position for which the metering chamber is at its maximum volume.
  • the pump body is mounted in the mouth of the tank. Each actuation of the pusher corresponds to the expulsion of a predetermined quantity of product.
  • the object of the invention is to simplify the structure of a metering dispenser adaptable to a cosmetic product in cream or gel or to a liquid product to be sprayed.
  • the invention makes it possible to reduce the number of parts which compose it.
  • the invention relates to a liquid or pasty product dispenser comprising a reservoir and a pump actuated by a pusher, said pusher being linked to a piston movable inside a pump body, characterized in that said body pump has a tubular section of smaller section than that of the reservoir, housing the piston and an annular spacer by which it is mounted tight against the inner wall of the pump body so as to provide an annular chamber for said product between the outer surface of said tubular part and the interior surface of said reservoir, in that a metering chamber, cylindrical, communicating with said annular chamber is located at the bottom of said reservoir, in that said piston engages and slides in leaktight manner in said chamber metering when said pusher is actuated and in that a discharge valve is arranged in said piston.
  • the metering chamber is defined at the lower part of the pump body which, no longer comprising the conventional suction tube, is pressed as far as possible into the reservoir. Under these conditions, the metering chamber is located at the bottom of the tank and the product confined in said annular chamber can flow by gravity to said metering chamber when the piston is not actuated. In this position, the metering chamber communicates with the annular chamber through the lateral passages of the pump body. This communication is interrupted by the piston when the pusher is actuated.
  • the metering chamber is defined in the reservoir itself, at the bottom thereof.
  • Said reservoir has a portion of smaller section forming said cylindrical metering chamber and the internal end of the pump body opens opposite said metering chamber to allow said piston to engage therein.
  • the reservoir may comprise an annular shoulder defined between the annular chamber and the metering chamber and the pump body abuts against this shoulder, which precisely stabilizes the position of the latter inside the reservoir. .
  • the aforementioned passages are provided in the vicinity of the internal end of the pump body to allow the product to flow, by gravity, between the annular chamber and the metering chamber.
  • the internal end of the piston comprises a frustoconical skirt of relatively flexible material sized so that its free circular edge can slide in leaktight manner in the metering chamber.
  • This frustoconical skirt can therefore ensure a certain pressurization of the metering chamber when the pusher is pressed. It is part of the discharge valve.
  • the term "internal end" of an element means that which is most engaged in the tank.
  • the piston comprises a rigid rod force-fitted into an axial sleeve of the pusher and the frustoconical skirt is extended by a tubular portion coming from molding and mounted on said rod.
  • the aforementioned discharge valve is defined between an enlarged free end of said rod and an annular rib projecting from the internal surface of said frustoconical skirt.
  • a discharge channel is arranged between said discharge valve and the outlet orifice defined in the pusher.
  • the pusher houses a spray nozzle.
  • the tubular portion integral with the frustoconical skirt is slidably mounted on said rod with a predetermined axial clearance, which allows the opening of the valve. delivery without creating significant overpressure in the dosing chamber. In this way, the product is expelled slowly, without jet formation.
  • the tubular portion integral with the frustoconical skirt is immobilized on the rod but due to its elasticity, the frustoconical skirt can deform to open a passage to the drainage channel communicating with the outlet orifice.
  • the latter is generally combined with spraying means located in the pusher.
  • the deformation of the frustoconical skirt necessary to cause the opening of the discharge valve implies a higher pressure rise in the metering chamber, favorable to the spraying of the product.
  • the free edge of the piston is released from the wall of the pump body; it therefore does not risk being deformed during a period of non-use and retains its original shape suitable for coming into tight contact with the cylindrical wall of said metering chamber.
  • the pump body is perfectly positioned inside the container; it is guided by the inner wall of the container and abuts at the bottom of the tank or against the shoulder defined in the vicinity of the metering chamber. Consequently, the pusher can adapt very closely to the top of the container. It has a side skirt which engages in the container and the radial overlap between the pusher and the interior wall of the container is minimum.
  • FIG. 1 is an elevational view in section of a dispenser in its non-use position
  • FIG. 2 is a view similar to Figure 1 showing the dispenser during a phase of use of the product
  • FIG. 3 and 4 are views similar to Figure 2, illustrating variants
  • FIG. 5 is an elevational view in section of a sprayer according to the invention in its non-use position
  • FIG. 6 is a view similar to Figure 5 showing the sprayer during a use phase.
  • the liquid product dispenser 11 shown in Figures 1 and 2 is here a pasty or gel cosmetic product dispenser. It comprises a reservoir 14 and a pump 16 with push-button actuation 18.
  • a metering chamber 20 is defined at the bottom of the pump body 22 mounted in said reservoir.
  • the plunger 18 is linked to a piston 24 movable inside the pump body.
  • the latter comprises a tubular part 26 of smaller section than that of the body 27 of the tank.
  • the pump body houses the piston 24.
  • the pump body 22 comprises an annular spacer 28 preferably comprising a skirt 30 as shown, mounted tight against the internal wall of the body 27 of the reservoir.
  • annular chamber 32 is defined for the product to be dispensed, this annular chamber being essentially delimited between the exterior surface of said tubular part of the pump body and the interior surface of the reservoir body.
  • the annular spacer 28 closes the annular chamber at the top.
  • the bottom of the tank has a portion 34 of smaller section which is connected to the tank body of larger section by a frustoconical wall 36.
  • the pump body 22 is in two parts made of molded plastic.
  • One is constituted by the tubular part 26 (extended radially by the annular spacer 28) which is open at its internal end.
  • the other forms a sort of cylindrical cup 29 which fits axially at the end of the tubular part 26 and closes the pump body.
  • the edge of the cup 29 comes to rest against an external shoulder 31 of the tubular part 26.
  • Slits made longitudinally in the side wall of the cup 29 defining passages 40 allowing the product to flow between the annular chamber 32 and the metering 20, by gravity when the piston is in a retracted position inside the pump body ( Figure 1).
  • said metering chamber is defined at the bottom of the cup 29.
  • the internal end of the tubular part 26 opens opposite the metering chamber 20 to allow the piston 24 to engage therein when the pusher 18 is actuated. In this stroke, the piston slides tightly in the metering chamber.
  • the internal end of the piston, facing the metering chamber, has a frustoconical skirt 42 dimensioned so that its free circular edge 43 can slide tightly in the dosing chamber. This frustoconical skirt therefore defines an inlet valve with the cup 29, near the ends of the slots defining the passages 40. This valve controls the passage of the product between the annular chamber 32 and the metering chamber 20.
  • the piston 24 and the pusher 18 are biased towards the outside of the reservoir by a spring 45 bearing between an upper shoulder of the pump body and the plunger.
  • the piston 24 comprises a rigid rod 52 forcibly mounted in an axial sleeve 54 of the pusher.
  • the frustoconical skirt is extended by a tubular portion 56 coming from molding and mounted sliding on this rod.
  • the upper end of the tubular portion 56 is slidably engaged in a cylindrical enlargement 54a of the sleeve 54 formed at the inner end of the latter.
  • a discharge valve 58 is formed between an enlarged free end 59, here frustoconical, of said rod and an annular rib 60 projecting from the internal surface of said frustoconical skirt.
  • the frustoconical end 59 of the rod extends inside the frustoconical skirt 42.
  • the annular rib 60 When the pusher is not actuated and the piston is retracted inside the pump body, the annular rib 60 is in waterproof support against the end enlarged free 59 of the rod.
  • This arrangement defines the discharge valve, which is closed in this position.
  • a discharge channel is arranged between this discharge valve 58 and an outlet orifice 62 defined in the pusher.
  • the discharge channel is defined by a groove or a flat 66 practiced longitudinally on the surface of the rod 52, an axial conduit 67 formed in the pusher, in the extension of the rod and a radial conduit 68 practiced in the pusher and extending between the conduit 67 and the outlet orifice 62.
  • Fins 55 are defined in the sleeve 54 to prevent the end of the rod from blocking the axial conduit 67 of the pusher.
  • the pusher 18 also includes a side skirt 70 engaged in the opening of the tank. Because the pump body 16 is precisely positioned in the reservoir and held therein by force-tightening at the level of the spacer 28, the radial overlap e between the external wall of the side skirt 70 of the pusher and the inner wall of the reservoir 14 is perfectly controlled and relatively weak. The operation is as follows.
  • the dispenser occupies the position of FIG. 1, the product can flow freely between the annular chamber 32 and the metering chamber 20. The latter is therefore filled, at least by gravity, as soon as the dispenser is held vertically.
  • the piston 24 moves towards the open lower end of the pump body until it comes into tight contact with the cylindrical side wall of the metering chamber 20 below the passages 40 From this moment, the communication between the annular chamber 32 and the metering chamber 20 is cut and, continuing its stroke, the piston causes a slight increase in pressure in the metering chamber. This increase in pressure results in an uplift of the frustoconical skirt 42 which causes an opening of the discharge valve 58. From this moment, the product trapped in the metering chamber can rise up to the outlet orifice 62.
  • the dispenser can be easily manufactured.
  • the reservoir 14 is easily moldable since it has only one wall.
  • the perfect positioning of the pump body 22 inside the tank makes it possible, as mentioned above, to obtain a very low Page not submitted at time of filing.
  • the liquid product dispenser 111 shown in FIGS. 5 and 6 is here a sprayer and more particularly a miniature sprayer comprising a reservoir 114 of small capacity and a pump 116 with push-button actuation 118.
  • the pump and the reservoir are combined in the measurement where, as will be seen later, a metering chamber 120 is directly arranged at the bottom of the tank in the extension of the pump body 122 mounted in said tank.
  • the plunger 118 is linked to a piston 124 movable inside the pump body.
  • the latter comprises a tubular part 126 of smaller section than that of the body 127 of the reservoir and which houses the piston 124.
  • the pump body 122 comprises an annular spacer 128 preferably comprising a skirt 130 as shown, mounted tight against the internal wall of the body 127 of the reservoir.
  • an annular chamber 132 is defined for the liquid product to be sprayed, this annular chamber being essentially delimited between the exterior surface of said tubular part of the pump body and the interior surface of the reservoir body.
  • the annular spacer 128 closes the annular chamber at the top.
  • the bottom of the tank has a portion 134 of smaller section which is connected to the tank body of larger section by a frustoconical wall 136 and an annular shoulder 138 surrounding the edge of the portion 134 of small section.
  • the metering chamber 120 is essentially delimited in the part 134 of small section.
  • the annular shoulder 138 extends between the edge of the metering chamber 120 and the adjacent end of the frustoconical wall 136. It forms a stop for the internal end of the pump body 122.
  • the body . pump has passages 140 allowing the flow of product between the annular chamber 132 and the metering chamber 120, by gravity when the piston is in a retracted position inside the pump body ( Figure 1).
  • the internal end of the pump body opens opposite the metering chamber 120 to allow the piston 124 to engage therein when the pusher 118 is actuated. In this stroke, the piston slides tightly in the metering chamber.
  • the internal end of the piston, facing the metering chamber, comprises a frustoconical skirt 142 of relatively flexible material, for example a flexible thermoplastic or an elastomer, dimensioned so that its free circular edge 143 can slide in leaktight manner in the metering chamber.
  • This frustoconical skirt therefore defines an intake valve with the edge of the portion 134 of smaller section of the reservoir, near the annular shoulder 138.
  • This valve controls the passage of the liquid between the annular chamber 132 and the metering chamber 120
  • the piston 124 and the pusher 118 are biased towards the outside of the reservoir by a spring 145 bearing between an upper shoulder of the pump body and the pusher. Consequently, under the action of this spring, the piston 124 is retracted inside the pump body and the liquid can flow, by gravity, between the annular chamber 132 and the metering chamber 120. In this position , the free edge of the piston, that is to say the edge 143 of the frustoconical skirt 142 is released from the wall of the pump body.
  • the piston 124 comprises a rigid rod 152 forcibly mounted in an axial sleeve 154 of the pusher.
  • the frustoconical skirt in flexible material is extended by a tubular portion 156 molded and fixed on this rod.
  • a discharge valve 158 is formed between an enlarged free end 159, here frustoconical, of said rod and an annular rib 160 projecting from the internal surface of said frustoconical skirt.
  • the frustoconical end 159 of the rod extends inside the frustoconical skirt 142.
  • This arrangement defines the discharge valve, which is closed in this position.
  • a discharge channel is arranged between this discharge valve 158 and an outlet orifice 162 defined in the pusher, more particularly here the outlet orifice of a spray nozzle 64 forcibly mounted in a lateral cavity of the pusher.
  • the evacuation channel is defined by a groove or a flat 166 practiced longitudinally on the surface of the rod 152, an axial conduit 167 practiced in the pusher, in the extension of the rod and a radial conduit 168 practiced in the pusher and extending between the duct 167 and the cavity containing the spray nozzle 164.
  • Fins are defined in the sleeve 154 to prevent the end of the rod from blocking the axial duct 167 of the pusher.
  • the pusher 118 also includes a side skirt 170 engaged in the opening of the reservoir. Because the pump body 116 is precisely positioned in the reservoir and held therein by force-tightening at the level of the spacer 128, the radial overlap e between the external wall of the side skirt 170 of the pusher and the inner wall of the tank 114 is perfectly controlled and relatively weak. The operation is as follows.
  • the dispenser occupies the position of FIG. 5, the liquid can flow freely between the annular chamber 132 and the metering chamber 120. The latter is therefore filled, by gravity, as soon as the dispenser is held vertically.
  • the piston 124 moves towards the open lower end of the pump body until it comes into tight contact with the cylindrical side wall of the metering chamber 120. From this at the moment, the communication between the annular chamber 132 and the metering chamber 120 is cut off and, continuing its stroke, the piston causes a pressure increase in the metering chamber. This pressure increase results in a deformation of the frustoconical skirt 142 which causes an opening of the discharge valve 158. From this moment, the liquid trapped in the metering chamber can rise up to the spray nozzle 64 of where it is ejected as a jet of fine droplets. This is illustrated in Figure 6.
  • the sprayer which has just been described may also, as a variant, include a completely closed pump body as described with reference to FIG. 1 or supported on the bottom of the portion 134 of reduced section as described with reference to FIG. 3.

Landscapes

  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Reciprocating Pumps (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Fertilizing (AREA)
  • Closures For Containers (AREA)

Abstract

The dispenser comprises a reservoir and a pump that is activated by a tappet, comprising a pump body that includes a tubular part with a smaller gauge than that of the reservoir, covering the piston, and an annular spacer by means of which it is tightly mounted against the inner wall of the reservoir such as to define an annular chamber for the product, which communicates with a dosage chamber located in the bottom of the reservoir.

Description

Distributeur de produit comprenant une pompe à actionnement par poussoir Product dispenser including push-button pump
L'invention se rapporte à un distributeur de produit liquide ou légèrement pâteux, essentiellement constitué d'un réservoir et d'une pompe à actionnement par poussoir, ladite pompe étant emboîtée à force dans le réservoir. L'invention s'applique plus particulièrement au domaine de la distribution des produits cosmétiques. Elle vise notamment un distributeur de crème ou gel à usage cosmétique. Dans un autre domaine, celui des pulvérisateurs, l'invention peut aussi s'appliquer à un pulvérisateur conçu pour contenir une dose d'un produit de luxe comme par exemple un parfum. Dans ce dernier cas, le distributeur est équipé d'une buse de pulvérisation. De tels distributeurs ou pulvérisateurs lorsqu'ils sont miniatures sont principalement destinés à être distribués gratuitement à la clientèle, pour faire connaître et apprécier les produits qu'ils contiennent.The invention relates to a dispenser for a liquid or slightly pasty product, essentially consisting of a reservoir and a push-button actuated pump, said pump being forced into the reservoir. The invention applies more particularly to the field of distribution of cosmetic products. It targets in particular a cream or gel dispenser for cosmetic use. In another field, that of sprayers, the invention can also be applied to a sprayer designed to contain a dose of a luxury product such as for example a perfume. In the latter case, the dispenser is equipped with a spray nozzle. Such distributors or sprayers when they are miniature are mainly intended to be distributed free of charge to customers, to publicize and appreciate the products they contain.
Dans les domaines définis ci-dessus, on vise constamment à simplifier la structure du dispositif et à abaisser les coûts de fabrication. Par conséquent, on cherche à réduire le nombre de composants et à rendre ceux-ci plus facile à fabriquer, notamment par moulage. On vise aussi à rendre l'assemblage plus facileIn the areas defined above, we constantly aim to simplify the structure of the device and lower manufacturing costs. Consequently, it is sought to reduce the number of components and to make them easier to manufacture, in particular by molding. We also aim to make assembly easier
Par exemple dans le domaine des distributeurs de produits liquides épais ou pâteux, tels que certains cosmétiques, le document FR 2 740 118 décrit un dispositif dans lequel est définie une chambre de pompage renfermant la totalité du produit. Cette chambre est directement définie entre le réservoir et un piston. Le dispositif ne permet pas de doser la quantité extraite. Par ailleurs, on connaît aussi un distributeur de produit liquide, notamment un pulvérisateur, comprenant généralement un réservoir et une pompe à poussoir installée dans ce réservoir. La pompe comprend un corps de pompe dans lequel est monté un piston. Une chambre de dosage du liquide est définie dans le corps de pompe et le piston forme une paroi mobile de cette chambre. Un clapet d'admission établit la communication entre la chambre de dosage et le réservoir contenant du liquide à pulvériser et un clapet d'échappement établit la communication entre la chambre de dosage et des moyens de distribution du produit. Un ressort sollicite le piston vers une position relâchée prédéterminée pour laquelle la chambre de dosage est à son volume maximum. Le corps de pompe est monté dans l'embouchure du réservoir. A chaque actionnement du poussoir correspond l'expulsion d'une quantité prédéterminée de produit.For example, in the field of distributors of thick or pasty liquid products, such as certain cosmetics, the document FR 2 740 118 describes a device in which a pumping chamber containing the entire product is defined. This chamber is directly defined between the reservoir and a piston. The device does not make it possible to dose the quantity extracted. Furthermore, there is also known a liquid product dispenser, in particular a sprayer, generally comprising a reservoir and a pusher pump installed in this reservoir. The pump comprises a pump body in which a piston is mounted. A liquid metering chamber is defined in the pump body and the piston forms a movable wall of this chamber. An intake valve establishes communication between the metering chamber and the reservoir containing the liquid to be sprayed and an exhaust valve establishes communication between the metering chamber and means for dispensing the product. A spring biases the piston towards a predetermined relaxed position for which the metering chamber is at its maximum volume. The pump body is mounted in the mouth of the tank. Each actuation of the pusher corresponds to the expulsion of a predetermined quantity of product.
L'invention a pour objet de simplifier la structure d'un distributeur doseur adaptable à un produit cosmétique en crème ou en gel ou à un produit liquide à pulvériser. L'invention permet de réduire le nombre de pièces qui le compose.The object of the invention is to simplify the structure of a metering dispenser adaptable to a cosmetic product in cream or gel or to a liquid product to be sprayed. The invention makes it possible to reduce the number of parts which compose it.
Plus précisément, l'invention concerne un distributeur de produit liquide ou pâteux comprenant un réservoir et une pompe à actionnement par poussoir, ledit poussoir étant lié à un piston mobile à l'intérieur d'un corps de pompe, caractérisé en ce que ledit corps de pompe comporte une partie tubulaire de section plus faible que celle du réservoir, abritant le piston et une entretoise annulaire par laquelle il est monté serré contre la paroi interne du corps de pompe de façon à ménager une chambre annulaire pour ledit produit entre la surface extérieure de ladite partie tubulaire et la surface intérieure dudit réservoir, en ce qu'une chambre de dosage, cylindrique, communiquant avec ladite chambre annulaire est située au fond dudit réservoir, en ce que ledit piston s'engage et coulisse de façon étanche dans ladite chambre de dosage lorsque ledit poussoir est actionné et en ce qu'un clapet de refoulement est agencé dans ledit piston.More specifically, the invention relates to a liquid or pasty product dispenser comprising a reservoir and a pump actuated by a pusher, said pusher being linked to a piston movable inside a pump body, characterized in that said body pump has a tubular section of smaller section than that of the reservoir, housing the piston and an annular spacer by which it is mounted tight against the inner wall of the pump body so as to provide an annular chamber for said product between the outer surface of said tubular part and the interior surface of said reservoir, in that a metering chamber, cylindrical, communicating with said annular chamber is located at the bottom of said reservoir, in that said piston engages and slides in leaktight manner in said chamber metering when said pusher is actuated and in that a discharge valve is arranged in said piston.
Selon un mode de réalisation possible, la chambre de dosage est définie à la partie inférieure du corps de pompe lequel, ne comportant plus le classique tube d'aspiration se trouve enfoncé au maximum dans le réservoir. Dans ces conditions, la chambre de dosage se situe bien au fond du réservoir et le produit confiné dans ladite chambre annulaire peut s'écouler par gravité vers ladite chambre de dosage lorsque le piston n'est pas actionné. Dans cette position, la chambre de dosage communique avec la chambre annulaire par les passages latéraux du corps de pompe. Cette communication est interrompue par le piston lorsque le poussoir est actionné.According to one possible embodiment, the metering chamber is defined at the lower part of the pump body which, no longer comprising the conventional suction tube, is pressed as far as possible into the reservoir. Under these conditions, the metering chamber is located at the bottom of the tank and the product confined in said annular chamber can flow by gravity to said metering chamber when the piston is not actuated. In this position, the metering chamber communicates with the annular chamber through the lateral passages of the pump body. This communication is interrupted by the piston when the pusher is actuated.
Selon un autre mode de réalisation possible, la chambre de dosage est définie dans le réservoir lui-même, au fond de celui-ci. Ledit réservoir comporte une partie de section plus faible formant ladite chambre de dosage cylindrique et l'extrémité interne du corps de pompe s'ouvre en regard de ladite chambre de dosage pour permettre audit piston de s'engager dans celle-ci. Ce mode de réalisation présente l'avantage de pouvoir réaliser le corps de pompe en une seule pièce. Dans ce cas, le réservoir peut comporter un épaulement annulaire défini entre la chambre annulaire et la chambre de dosage et le corps de pompe vient en butée contre cet épaulement, ce qui stabilise avec précision la position de celui-ci à l'intérieur du réservoir. Les passages précités sont ménagés au voisinage de l'extrémité interne du corps de pompe pour permettre l'écoulement du produit, par gravité, entre la chambre annulaire et la chambre de dosage.According to another possible embodiment, the metering chamber is defined in the reservoir itself, at the bottom thereof. Said reservoir has a portion of smaller section forming said cylindrical metering chamber and the internal end of the pump body opens opposite said metering chamber to allow said piston to engage therein. This embodiment presents the advantage of being able to make the pump body in one piece. In this case, the reservoir may comprise an annular shoulder defined between the annular chamber and the metering chamber and the pump body abuts against this shoulder, which precisely stabilizes the position of the latter inside the reservoir. . The aforementioned passages are provided in the vicinity of the internal end of the pump body to allow the product to flow, by gravity, between the annular chamber and the metering chamber.
Selon un mode de réalisation, l'extrémité interne du piston comporte une jupe tronconique en matériau relativement souple dimensionnée pour que son bord libre circulaire puisse coulisser de façon étanche dans la chambre de dosage. Cette jupe tronconique peut donc assurer une certaine mise en pression de la chambre de dosage lorsque l'on appuie sur le poussoir. Elle fait partie du clapet de refoulement. On entend par "extrémité interne" d'un élément, celle qui se trouve le plus engagée dans le réservoir.According to one embodiment, the internal end of the piston comprises a frustoconical skirt of relatively flexible material sized so that its free circular edge can slide in leaktight manner in the metering chamber. This frustoconical skirt can therefore ensure a certain pressurization of the metering chamber when the pusher is pressed. It is part of the discharge valve. The term "internal end" of an element means that which is most engaged in the tank.
Selon un mode de réalisation, le piston comporte une tige rigide montée à force dans un manchon axial du poussoir et la jupe tronconique est prolongée par une portion tubulaire venue de moulage et montée sur ladite tige. Le clapet de refoulement précité est défini entre une extrémité libre élargie de ladite tige et une nervure annulaire faisant saillie à la surface interne de ladite jupe tronconique. Un canal d'évacuation est agencé entre ledit clapet de refoulement et l'orifice de sortie défini dans le poussoir. Dans le cas d'un pulvérisateur, le poussoir abrite une buse de pulvérisation.According to one embodiment, the piston comprises a rigid rod force-fitted into an axial sleeve of the pusher and the frustoconical skirt is extended by a tubular portion coming from molding and mounted on said rod. The aforementioned discharge valve is defined between an enlarged free end of said rod and an annular rib projecting from the internal surface of said frustoconical skirt. A discharge channel is arranged between said discharge valve and the outlet orifice defined in the pusher. In the case of a sprayer, the pusher houses a spray nozzle.
Selon un mode de réalisation plus particulièrement indiqué pour un distributeur de produit cosmétique pâteux ou sous forme de gel, la portion tubulaire solidaire de la jupe tronconique est montée coulissante sur ladite tige avec un débattement axial prédéterminé, ce qui permet l'ouverture du clapet de refoulement sans créer de surpression importante dans la chambre de dosage. De cette façon, le produit est expulsé lentement, sans formation de jet.According to an embodiment more particularly indicated for a dispenser of pasty cosmetic product or in gel form, the tubular portion integral with the frustoconical skirt is slidably mounted on said rod with a predetermined axial clearance, which allows the opening of the valve. delivery without creating significant overpressure in the dosing chamber. In this way, the product is expelled slowly, without jet formation.
Selon un autre mode de réalisation plus particulièrement indiqué pour un distributeur de produit liquide à pulvériser, la portion tubulaire solidaire de la jupe tronconique est immobilisée sur la tige mais en raison de son élasticité, la jupe tronconique peut se déformer pour ouvrir un passage vers le canal d'évacuation communiquant avec l'orifice de sortie. Ce dernier est généralement combiné à des moyens de pulvérisation situés dans le poussoir. Dans ce cas, la déformation de la jupe tronconique nécessaire pour provoquer l'ouverture du clapet de refoulement implique une montée en pression plus importante dans la chambre de dosage, favorable à la pulvérisation du produit.According to another embodiment more particularly indicated for a dispenser of liquid product to be sprayed, the tubular portion integral with the frustoconical skirt is immobilized on the rod but due to its elasticity, the frustoconical skirt can deform to open a passage to the drainage channel communicating with the outlet orifice. The latter is generally combined with spraying means located in the pusher. In this case, the deformation of the frustoconical skirt necessary to cause the opening of the discharge valve implies a higher pressure rise in the metering chamber, favorable to the spraying of the product.
Avantageusement, dans une position, rétractée à l'intérieur du corps d'une pompe, le bord libre du piston est dégagé de la paroi du corps de pompe ; il ne risque donc pas d'être déformé pendant une période de non-utilisation et conservé sa forme d'origine propre à entrer en contact étanche avec la paroi cylindrique de ladite chambre de dosage.Advantageously, in a position, retracted inside the body of a pump, the free edge of the piston is released from the wall of the pump body; it therefore does not risk being deformed during a period of non-use and retains its original shape suitable for coming into tight contact with the cylindrical wall of said metering chamber.
Toutes les pièces peuvent être en matière plastique moulée. Chacune d'elle est facile à mouler. D'autre part, le corps de pompe est parfaitement positionné à l'intérieur du récipient ; il est guidé par la paroi intérieure du récipient et vient en butée au fond du réservoir ou contre l'épaulement défini au voisinage de la chambre de dosage. En conséquence, le poussoir peut s'adapter de façon très ajustée à la partie supérieure du récipient. Il comporte une jupe latérale qui s'engage dans le récipient et le recouvrement radial entre le poussoir et la paroi intérieure du récipient est minimum.All parts can be molded plastic. Each of them is easy to mold. On the other hand, the pump body is perfectly positioned inside the container; it is guided by the inner wall of the container and abuts at the bottom of the tank or against the shoulder defined in the vicinity of the metering chamber. Consequently, the pusher can adapt very closely to the top of the container. It has a side skirt which engages in the container and the radial overlap between the pusher and the interior wall of the container is minimum.
L'invention sera mieux comprise et d'autres avantages de celle- ci apparaîtront mieux à la lumière de la description qui va suivre d'un mode de réalisation actuellement préféré d'un distributeur de produit liquide conforme à son principe, donnée uniquement à titre d'exemple et faite en référence aux dessins annexés dans lesquels :The invention will be better understood and other advantages thereof will appear better in the light of the following description of a currently preferred embodiment of a liquid product dispenser in accordance with its principle, given solely by way of example and made with reference to the accompanying drawings in which:
- la figure 1 est une vue en élévation et en coupe d'un distributeur dans sa position de non-utilisation ;- Figure 1 is an elevational view in section of a dispenser in its non-use position;
- la figure 2 est une vue analogue à la figure 1 représentant le distributeur pendant une phase d'utilisation du produit ; - les figures 3 et 4 sont des vues analogues à la figure 2, illustrant des variantes ; et- Figure 2 is a view similar to Figure 1 showing the dispenser during a phase of use of the product; - Figures 3 and 4 are views similar to Figure 2, illustrating variants; and
- la figure 5 est une vue en élévation et en coupe d'un pulvérisateur selon l'invention dans sa position de non-utilisation ; et- Figure 5 is an elevational view in section of a sprayer according to the invention in its non-use position; and
- la figure 6 est une vue analogue à la figure 5 représentant le pulvérisateur pendant une phase d'utilisation. Le distributeur de produit liquide 11 représenté sur les figures 1 et 2 est ici un distributeur de produit cosmétique pâteux ou en gel. Il comprend un réservoir 14 et une pompe 16 à actionnement par poussoir 18. Une chambre de dosage 20 est définie au fond du corps de pompe 22 monté dans ledit réservoir. Le poussoir 18 est lié à un piston 24 mobile à l'intérieur du corps de pompe. Ce dernier comporte une partie tubulaire 26 de section plus faible que celle du corps 27 du réservoir. Le corps de pompe abrite le piston 24. De plus, le corps de pompe 22 comprend une entretoise annulaire 28 comportant de préférence une jupe 30 comme représenté, montée serrée contre la paroi interne du corps 27 du réservoir. De cette façon, on définit une chambre annulaire 32 pour le produit à distribuer, cette chambre annulaire étant essentiellement délimitée entre la surface extérieure de ladite partie tubulaire du corps de pompe et la surface intérieure du corps de réservoir. L'entretoise annulaire 28 ferme la chambre annulaire en partie supérieure. Le fond du réservoir comporte une partie 34 de section plus faible qui se raccorde au corps de réservoir de plus grande section par une paroi tronconique 36.- Figure 6 is a view similar to Figure 5 showing the sprayer during a use phase. The liquid product dispenser 11 shown in Figures 1 and 2 is here a pasty or gel cosmetic product dispenser. It comprises a reservoir 14 and a pump 16 with push-button actuation 18. A metering chamber 20 is defined at the bottom of the pump body 22 mounted in said reservoir. The plunger 18 is linked to a piston 24 movable inside the pump body. The latter comprises a tubular part 26 of smaller section than that of the body 27 of the tank. The pump body houses the piston 24. In addition, the pump body 22 comprises an annular spacer 28 preferably comprising a skirt 30 as shown, mounted tight against the internal wall of the body 27 of the reservoir. In this way, an annular chamber 32 is defined for the product to be dispensed, this annular chamber being essentially delimited between the exterior surface of said tubular part of the pump body and the interior surface of the reservoir body. The annular spacer 28 closes the annular chamber at the top. The bottom of the tank has a portion 34 of smaller section which is connected to the tank body of larger section by a frustoconical wall 36.
Plus précisément, le corps de pompe 22 est en deux parties en matière plastique moulée. L'une est constituée par la partie tubulaire 26 (prolongée radialement par l'entretoise annulaire 28) qui est ouverte à son extrémité interne. L'autre forme une sorte de coupelle cylindrique 29 qui vient s'emboîter axialement à l'extrémité de la partie tubulaire 26 et fermer le corps de pompe. Le bord de la coupelle 29 vient reposer contre un épaulement extérieur 31 de la partie tubulaire 26. Des fentes pratiquées longitudinalement dans la paroi latérale de la coupelle 29 définissant des passages 40 permettant l'écoulement du produit entre la chambre annulaire 32 et la chambre de dosage 20, par gravité lorsque le piston est dans une position rétractée à l'intérieur du corps de pompe (figure 1). Dans cet exemple, ladite chambre de dosage est définie au fond de la coupelle 29.More specifically, the pump body 22 is in two parts made of molded plastic. One is constituted by the tubular part 26 (extended radially by the annular spacer 28) which is open at its internal end. The other forms a sort of cylindrical cup 29 which fits axially at the end of the tubular part 26 and closes the pump body. The edge of the cup 29 comes to rest against an external shoulder 31 of the tubular part 26. Slits made longitudinally in the side wall of the cup 29 defining passages 40 allowing the product to flow between the annular chamber 32 and the metering 20, by gravity when the piston is in a retracted position inside the pump body (Figure 1). In this example, said metering chamber is defined at the bottom of the cup 29.
L'extrémité interne de la partie tubulaire 26 s'ouvre en regard de la chambre de dosage 20 pour permettre au piston 24 de s'engager dans celle-ci lorsque le poussoir 18 est actionné. Dans cette course, le piston coulisse de façon étanche dans la chambre de dosage. L'extrémité interne du piston, en regard de la chambre de dosage comporte une jupe tronconique 42 dimensionnée pour que son bord libre circulaire 43 puisse coulisser de façon étanche dans la chambre de dosage. Cette jupe tronconique définit donc un clapet d'admission avec la coupelle 29, près des extrémités des fentes définissant les passages 40. Ce clapet commande le passage du produit entre la chambre annulaire 32 et la chambre de dosage 20. Le piston 24 et le poussoir 18 sont sollicités vers l'extérieur du réservoir par un ressort 45 prenant appui entre un épaulement supérieur du corps de pompe et le poussoir. Par conséquent, sous l'action de ce ressort, le piston 24 est rétracté à l'intérieur du corps de pompe et le produit peut s'écouler, par gravité, entre la chambre annulaire 32 et la chambre de dosage 20. Dans cette position, le bord libre du piston, c'est-à-dire le bord 43 de la jupe tronconique 42 est dégagé de la paroi du corps de pompe. En effet, un léger jeu subsiste entre ce bord libre et la paroi du corps de pompe et par conséquent, dans cette position de non-utilisation, la jupe tronconique 42 du piston ne risque pas d'être déformée. Dans cette position, la surface extérieure de la jupe tronconique vient en contact de butée avec un bord circulaire 48 défini dans le corps de pompe. Ce contact, relativement étanche est maintenu sous la sollicitation du ressort 45. Bien entendu, dans cette position de repos du piston les passages 40 entre la chambre annulaire 32 et la chambre de dosage 20 sont ouverts. Le piston 24 est guidé en coulissement dans un alésage 50 du corps de pompe. Le coulissement est suffisamment étanche pour que le liquide ne puisse s'écouler le long de cet alésage.The internal end of the tubular part 26 opens opposite the metering chamber 20 to allow the piston 24 to engage therein when the pusher 18 is actuated. In this stroke, the piston slides tightly in the metering chamber. The internal end of the piston, facing the metering chamber, has a frustoconical skirt 42 dimensioned so that its free circular edge 43 can slide tightly in the dosing chamber. This frustoconical skirt therefore defines an inlet valve with the cup 29, near the ends of the slots defining the passages 40. This valve controls the passage of the product between the annular chamber 32 and the metering chamber 20. The piston 24 and the pusher 18 are biased towards the outside of the reservoir by a spring 45 bearing between an upper shoulder of the pump body and the plunger. Consequently, under the action of this spring, the piston 24 is retracted inside the pump body and the product can flow, by gravity, between the annular chamber 32 and the metering chamber 20. In this position , the free edge of the piston, that is to say the edge 43 of the frustoconical skirt 42 is released from the wall of the pump body. Indeed, a slight clearance remains between this free edge and the wall of the pump body and therefore, in this position of non-use, the frustoconical skirt 42 of the piston is not likely to be deformed. In this position, the outer surface of the frustoconical skirt comes into abutment contact with a circular edge 48 defined in the pump body. This relatively sealed contact is maintained under the bias of the spring 45. Of course, in this position of rest of the piston, the passages 40 between the annular chamber 32 and the metering chamber 20 are open. The piston 24 is guided in sliding in a bore 50 of the pump body. The sliding is sufficiently tight so that the liquid cannot flow along this bore.
Le piston 24 comporte une tige rigide 52 montée à force dans un manchon axial 54 du poussoir. La jupe tronconique est prolongée par une portion tubulaire 56 venue de moulage et montée coulissante sur cette tige. L'extrémité supérieure de la portion tubulaire 56 est engagée à coulissement étanche dans un élargissement cylindrique 54a du manchon 54 ménagé à l'extrémité interne de celui-ci. Par ce moyen, le piston 24 peut coulisser d'une course h le long de la tige 52. Un clapet de refoulement 58 est formé entre une extrémité libre élargie 59, ici tronconique, de ladite tige et une nervure annulaire 60 faisant saillie à la surface interne de ladite jupe tronconique. L'extrémité tronconique 59 de la tige s'étend à l'intérieur de la jupe tronconique 42. Lorsque le poussoir n'est pas actionné et que le piston est rétracté à l'intérieur du corps de pompe, la nervure annulaire 60 est en appui étanche contre l'extrémité libre élargie 59 de la tige. Cet agencement définit le clapet de refoulement, qui est fermé dans cette position. Un canal d'évacuation est agencé entre ce clapet de refoulement 58 et un orifice de sortie 62 défini dans le poussoir. Dans l'exemple, le canal d'évacuation est défini par une rainure ou un méplat 66 pratiqué longitudinalement à la surface de la tige 52, un conduit axial 67 pratiqué dans le poussoir, dans le prolongement de la tige et un conduit radial 68 pratiqué dans le poussoir et s'étendant entre le conduit 67 et l'orifice de sortie 62. Des ailettes 55 sont définies dans le manchon 54 pour éviter que l'extrémité de la tige vienne obturer le conduit axial 67 du poussoir. Le poussoir 18 comporte aussi une jupe latérale 70 engagée dans l'ouverture du réservoir. Du fait que le corps de pompe 16 est positionné avec précision dans le réservoir et maintenu dans celui-ci par serrage à force au niveau de l'entretoise 28, le recouvrement radial e entre la paroi externe de la jupe latérale 70 du poussoir et la paroi interne du réservoir 14 est parfaitement contrôlé et relativement faible. Le fonctionnement est le suivant.The piston 24 comprises a rigid rod 52 forcibly mounted in an axial sleeve 54 of the pusher. The frustoconical skirt is extended by a tubular portion 56 coming from molding and mounted sliding on this rod. The upper end of the tubular portion 56 is slidably engaged in a cylindrical enlargement 54a of the sleeve 54 formed at the inner end of the latter. By this means, the piston 24 can slide with a stroke h along the rod 52. A discharge valve 58 is formed between an enlarged free end 59, here frustoconical, of said rod and an annular rib 60 projecting from the internal surface of said frustoconical skirt. The frustoconical end 59 of the rod extends inside the frustoconical skirt 42. When the pusher is not actuated and the piston is retracted inside the pump body, the annular rib 60 is in waterproof support against the end enlarged free 59 of the rod. This arrangement defines the discharge valve, which is closed in this position. A discharge channel is arranged between this discharge valve 58 and an outlet orifice 62 defined in the pusher. In the example, the discharge channel is defined by a groove or a flat 66 practiced longitudinally on the surface of the rod 52, an axial conduit 67 formed in the pusher, in the extension of the rod and a radial conduit 68 practiced in the pusher and extending between the conduit 67 and the outlet orifice 62. Fins 55 are defined in the sleeve 54 to prevent the end of the rod from blocking the axial conduit 67 of the pusher. The pusher 18 also includes a side skirt 70 engaged in the opening of the tank. Because the pump body 16 is precisely positioned in the reservoir and held therein by force-tightening at the level of the spacer 28, the radial overlap e between the external wall of the side skirt 70 of the pusher and the inner wall of the reservoir 14 is perfectly controlled and relatively weak. The operation is as follows.
En position de non-utilisation, le distributeur occupe la position de la figure 1, le produit peut s'écouler librement entre la chambre annulaire 32 et la chambre de dosage 20. Cette dernière est donc remplie, au moins par gravité, dès lors que le distributeur est maintenu verticalement. Dès que l'on commence à appuyer sur le poussoir, le piston 24 se déplace vers l'extrémité inférieure ouverte du corps de pompe jusqu'à venir en contact étanche avec la paroi latérale cylindrique de la chambre de dosage 20 en dessous des passages 40. A partir de ce moment, la communication entre la chambre annulaire 32 et la chambre de dosage 20 est coupée et, poursuivant sa course, le piston provoque une légère élévation de pression dans la chambre de dosage. Cette élévation de pression se traduit par un soulèvement de la jupe tronconique 42 qui provoque une ouverture du clapet de refoulement 58. A partir de ce moment, le produit emprisonné dans la chambre de dosage peut remonter jusqu'à l'orifice de sortie 62.In the non-use position, the dispenser occupies the position of FIG. 1, the product can flow freely between the annular chamber 32 and the metering chamber 20. The latter is therefore filled, at least by gravity, as soon as the dispenser is held vertically. As soon as one begins to press the plunger, the piston 24 moves towards the open lower end of the pump body until it comes into tight contact with the cylindrical side wall of the metering chamber 20 below the passages 40 From this moment, the communication between the annular chamber 32 and the metering chamber 20 is cut and, continuing its stroke, the piston causes a slight increase in pressure in the metering chamber. This increase in pressure results in an uplift of the frustoconical skirt 42 which causes an opening of the discharge valve 58. From this moment, the product trapped in the metering chamber can rise up to the outlet orifice 62.
Il est à noter que toutes les pièces du distributeur peuvent être facilement fabriquées. En particulier, le réservoir 14 est facilement moulable puisqu'il ne comporte qu'une seule paroi. En outre, le positionnement parfait du corps de pompe 22 à l'intérieur du réservoir permet d'obtenir, comme mentionné précédemment, un très faible Page non soumise au moment du dépôt. Note that all parts of the dispenser can be easily manufactured. In particular, the reservoir 14 is easily moldable since it has only one wall. In addition, the perfect positioning of the pump body 22 inside the tank makes it possible, as mentioned above, to obtain a very low Page not submitted at time of filing.
Le distributeur de produit liquide 111 représenté sur les figures 5 et 6 est ici un pulvérisateur et plus particulièrement un pulvérisateur miniature comprenant un réservoir 114 de faible contenance et une pompe 116 à actionnement par poussoir 118. La pompe et le réservoir sont combinés dans la mesure où, comme on le verra plus loin, une chambre de dosage 120 est directement aménagée au fond du réservoir dans le prolongement du corps de pompe 122 monté dans ledit réservoir. Le poussoir 118 est lié à un piston 124 mobile à l'intérieur du corps de pompe. Ce dernier comporte une partie tubulaire 126 de section plus faible que celle du corps 127 du réservoir et qui abrite le piston 124. De plus, le corps de pompe 122 comprend une entretoise annulaire 128 comportant de préférence une jupe 130 comme représenté, montée serrée contre la paroi interne du corps 127 du réservoir. De cette façon, on définit une chambre annulaire 132 pour le produit liquide à pulvériser, cette chambre annulaire étant essentiellement délimitée entre la surface extérieure de ladite partie tubulaire du corps de pompe et la surface intérieure du corps de réservoir. L'entretoise annulaire 128 ferme la chambre annulaire en partie supérieure. Le fond du réservoir comporte une partie 134 de section plus faible qui se raccorde au corps de réservoir de plus grande section par une paroi tronconique 136 et un épaulement annulaire 138 entourant le bord de la partie 134 de faible section. La chambre de dosage 120 se trouve essentiellement délimitée dans la partie 134 de faible section. L'épaulement annulaire 138 s'étend entre le bord de la chambre de dosage 120 et l'extrémité adjacente de la paroi tronconique 136. Il forme une butée pour l'extrémité interne du corps de pompe 122.The liquid product dispenser 111 shown in FIGS. 5 and 6 is here a sprayer and more particularly a miniature sprayer comprising a reservoir 114 of small capacity and a pump 116 with push-button actuation 118. The pump and the reservoir are combined in the measurement where, as will be seen later, a metering chamber 120 is directly arranged at the bottom of the tank in the extension of the pump body 122 mounted in said tank. The plunger 118 is linked to a piston 124 movable inside the pump body. The latter comprises a tubular part 126 of smaller section than that of the body 127 of the reservoir and which houses the piston 124. In addition, the pump body 122 comprises an annular spacer 128 preferably comprising a skirt 130 as shown, mounted tight against the internal wall of the body 127 of the reservoir. In this way, an annular chamber 132 is defined for the liquid product to be sprayed, this annular chamber being essentially delimited between the exterior surface of said tubular part of the pump body and the interior surface of the reservoir body. The annular spacer 128 closes the annular chamber at the top. The bottom of the tank has a portion 134 of smaller section which is connected to the tank body of larger section by a frustoconical wall 136 and an annular shoulder 138 surrounding the edge of the portion 134 of small section. The metering chamber 120 is essentially delimited in the part 134 of small section. The annular shoulder 138 extends between the edge of the metering chamber 120 and the adjacent end of the frustoconical wall 136. It forms a stop for the internal end of the pump body 122.
Au voisinage de son extrémité interne, le corps . de pompe comporte des passages 140 permettant l'écoulement du produit entre la chambre annulaire 132 et la chambre de dosage 120, par gravité lorsque le piston est dans une position rétractée à l'intérieur du corps de pompe (figure 1).In the vicinity of its internal end, the body . pump has passages 140 allowing the flow of product between the annular chamber 132 and the metering chamber 120, by gravity when the piston is in a retracted position inside the pump body (Figure 1).
L'extrémité interne du corps de pompe s'ouvre en regard de la chambre de dosage 120 pour permettre au piston 124 de s'engager dans celle-ci lorsque le poussoir 118 est actionné. Dans cette course, le piston coulisse de façon étanche dans la chambre de dosage. L'extrémité interne du piston, en regard de la chambre de dosage comporte une jupe tronconique 142 en matériau relativement souple, par exemple un thermoplastique souple ou un élastomère, dimensionnée pour que son bord libre circulaire 143 puisse coulisser de façon étanche dans la chambre de dosage. Cette jupe tronconique définit donc un clapet d'admission avec le bord de la partie 134 de section plus faible du réservoir, près de l'épaulement annulaire 138. Ce clapet commande le passage du liquide entre la chambre annulaire 132 et la chambre de dosage 120. Le piston 124 et le poussoir 118 sont sollicités vers l'extérieur du réservoir par un ressort 145 prenant appui entre un épaulement supérieur du corps de pompe et le poussoir. Par conséquent, sous l'action de ce ressort, le piston 124 est rétracté à l'intérieur du corps de pompe et le liquide peut s'écouler, par gravité, entre la chambre annulaire 132 et la chambre de dosage 120. Dans cette position, le bord libre du piston, c'est- à-dire le bord 143 de la jupe tronconique 142 est dégagé de la paroi du corps de pompe. En effet, un léger jeu subsiste entre ce bord libre et la paroi du corps de pompe et par conséquent, dans cette position de non- utilisation, la jupe tronconique 142 du piston ne risque pas d'être déformée. Dans cette position, la surface extérieure de la jupe tronconique vient en contact de butée avec un bord circulaire 148 défini dans le corps de pompe. Ce contact, relativement étanche est maintenu sous la sollicitation du ressort 145. Bien entendu, dans cette position de repos du piston les passages 140 entre la chambre annulaire 132 et la chambre de dosage 120 sont ouverts. Le piston 124 est guidé en coulissement dans un alésage 150 du corps de pompe. Le coulissement est suffisamment étanche pour que le liquide ne puisse s'écouler le long de cet alésage.The internal end of the pump body opens opposite the metering chamber 120 to allow the piston 124 to engage therein when the pusher 118 is actuated. In this stroke, the piston slides tightly in the metering chamber. The internal end of the piston, facing the metering chamber, comprises a frustoconical skirt 142 of relatively flexible material, for example a flexible thermoplastic or an elastomer, dimensioned so that its free circular edge 143 can slide in leaktight manner in the metering chamber. This frustoconical skirt therefore defines an intake valve with the edge of the portion 134 of smaller section of the reservoir, near the annular shoulder 138. This valve controls the passage of the liquid between the annular chamber 132 and the metering chamber 120 The piston 124 and the pusher 118 are biased towards the outside of the reservoir by a spring 145 bearing between an upper shoulder of the pump body and the pusher. Consequently, under the action of this spring, the piston 124 is retracted inside the pump body and the liquid can flow, by gravity, between the annular chamber 132 and the metering chamber 120. In this position , the free edge of the piston, that is to say the edge 143 of the frustoconical skirt 142 is released from the wall of the pump body. Indeed, a slight clearance remains between this free edge and the wall of the pump body and therefore, in this position of non-use, the frustoconical skirt 142 of the piston is not likely to be deformed. In this position, the outer surface of the frustoconical skirt comes into abutment contact with a circular edge 148 defined in the pump body. This relatively sealed contact is maintained under the bias of the spring 145. Of course, in this position of rest of the piston, the passages 140 between the annular chamber 132 and the metering chamber 120 are open. The piston 124 is guided in sliding in a bore 150 of the pump body. The sliding is sufficiently tight so that the liquid cannot flow along this bore.
Le piston 124 comporte une tige rigide 152 montée à force dans un manchon axial 154 du poussoir. La jupe tronconique en matériau souple est prolongée par une portion tubulaire 156 venue de moulage et fixée sur cette tige. Un clapet de refoulement 158 est formé entre une extrémité libre élargie 159, ici tronconique, de ladite tige et une nervure annulaire 160 faisant saillie à la surface interne de ladite jupe tronconique. L'extrémité tronconique 159 de la tige s'étend à l'intérieur de la jupe tronconique 142. Lorsque le poussoir n'est pas actionné et que le piston est rétracté à l'intérieur du corps de pompe, la nervure annulaire 160 est en appui étanche contre l'extrémité libre élargie 159 de la tige. Cet agencement définit le clapet de refoulement, qui est fermé dans cette position. Un canal d'évacuation est agencé entre ce clapet de refoulement 158 et un orifice de sortie 162 défini dans le poussoir, plus particulièrement ici l'orifice de sortie d'une buse de pulvérisation 64 montée à force dans une cavité latérale du poussoir. Dans l'exemple, le canal d'évacuation est défini par une rainure ou un méplat 166 pratiqué longitudinalement à la surface de la tige 152, un conduit axial 167 pratiqué dans le poussoir, dans le prolongement de la tige et un conduit radial 168 pratiqué dans le poussoir et s'étendant entre le conduit 167 et la cavité renfermant la buse de pulvérisation 164. Des ailettes sont définies dans le manchon 154 pour éviter que l'extrémité de la tige vienne obturer le conduit axial 167 du poussoir. Le poussoir 118 comporte aussi une jupe latérale 170 engagée dans l'ouverture du réservoir. Du fait que le corps de pompe 116 est positionné avec précision dans le réservoir et maintenu dans celui-ci par serrage à force au niveau de l'entretoise 128, le recouvrement radial e entre la paroi externe de la jupe latérale 170 du poussoir et la paroi interne du réservoir 114 est parfaitement contrôlé et relativement faible. Le fonctionnement est le suivant.The piston 124 comprises a rigid rod 152 forcibly mounted in an axial sleeve 154 of the pusher. The frustoconical skirt in flexible material is extended by a tubular portion 156 molded and fixed on this rod. A discharge valve 158 is formed between an enlarged free end 159, here frustoconical, of said rod and an annular rib 160 projecting from the internal surface of said frustoconical skirt. The frustoconical end 159 of the rod extends inside the frustoconical skirt 142. When the pusher is not actuated and the piston is retracted inside the pump body, the annular rib 160 is in watertight support against the enlarged free end 159 of the rod. This arrangement defines the discharge valve, which is closed in this position. A discharge channel is arranged between this discharge valve 158 and an outlet orifice 162 defined in the pusher, more particularly here the outlet orifice of a spray nozzle 64 forcibly mounted in a lateral cavity of the pusher. In the example, the evacuation channel is defined by a groove or a flat 166 practiced longitudinally on the surface of the rod 152, an axial conduit 167 practiced in the pusher, in the extension of the rod and a radial conduit 168 practiced in the pusher and extending between the duct 167 and the cavity containing the spray nozzle 164. Fins are defined in the sleeve 154 to prevent the end of the rod from blocking the axial duct 167 of the pusher. The pusher 118 also includes a side skirt 170 engaged in the opening of the reservoir. Because the pump body 116 is precisely positioned in the reservoir and held therein by force-tightening at the level of the spacer 128, the radial overlap e between the external wall of the side skirt 170 of the pusher and the inner wall of the tank 114 is perfectly controlled and relatively weak. The operation is as follows.
En position de non-utilisation, le distributeur occupe la position de la figure 5, le liquide peut s'écouler librement entre la chambre annulaire 132 et la chambre de dosage 120. Cette dernière est donc remplie, par gravité, dès lors que le distributeur est maintenu verticalement. Dès que l'on commence à appuyer sur le poussoir, le piston 124 se déplace vers l'extrémité inférieure ouverte du corps de pompe jusqu'à venir en contact étanche avec la paroi latérale cylindrique de la chambre de dosage 120. A partir de ce moment, la communication entre la chambre annulaire 132 et la chambre de dosage 120 est coupée et, poursuivant sa course, le piston provoque une élévation de pression dans la chambre de dosage. Cette élévation de pression se traduit par une déformation de la jupe tronconique 142 qui provoque une ouverture du clapet de refoulement 158. A partir de ce moment, le liquide emprisonné dans la chambre de dosage peut remonter jusqu'à la buse de pulvérisation 64 d'où il est éjecté sous forme d'un jet de fines gouttelettes. C'est ce qui est illustré à la figure 6.In the non-use position, the dispenser occupies the position of FIG. 5, the liquid can flow freely between the annular chamber 132 and the metering chamber 120. The latter is therefore filled, by gravity, as soon as the dispenser is held vertically. As soon as one begins to press the plunger, the piston 124 moves towards the open lower end of the pump body until it comes into tight contact with the cylindrical side wall of the metering chamber 120. From this at the moment, the communication between the annular chamber 132 and the metering chamber 120 is cut off and, continuing its stroke, the piston causes a pressure increase in the metering chamber. This pressure increase results in a deformation of the frustoconical skirt 142 which causes an opening of the discharge valve 158. From this moment, the liquid trapped in the metering chamber can rise up to the spray nozzle 64 of where it is ejected as a jet of fine droplets. This is illustrated in Figure 6.
Bien entendu, le pulvérisateur qui vient d'être décrit peut aussi, en variante, comporter un corps de pompe totalement fermé comme décrit en référence à la figure 1 ou prenant appui sur le fond de la partie 134 de section réduite comme décrit en référence à la figure 3. Of course, the sprayer which has just been described may also, as a variant, include a completely closed pump body as described with reference to FIG. 1 or supported on the bottom of the portion 134 of reduced section as described with reference to FIG. 3.

Claims

REVENDICATIONS
1. Distributeur de produit liquide ou pâteux comprenant un réservoir (14) et une pompe (16) à actionnement par poussoir (18), ledit poussoir étant lié à un piston (24) mobile à l'intérieur d'un corps de pompe (22), caractérisé en ce que ledit corps de pompe comporte une partie tubulaire (26) de section plus faible que celle du réservoir, abritant le piston et une entretoise annulaire (28) par laquelle il est monté serré contre la paroi interne du réservoir de façon à ménager une chambre annulaire (32) pour ledit produit entre la surface extérieure de ladite partie tubulaire et la surface intérieure dudit réservoir, en ce qu'une chambre de dosage (20), cylindrique, communiquant avec ladite chambre annulaire, est située au fond dudit réservoir, en ce que ledit piston (24) s'engage et coulisse de façon étanche dans ladite chambre de dosage lorsque ledit poussoir est actionné, et en ce qu'un clapet de refoulement (58) est agencé dans ledit piston.1. Distributor of liquid or pasty product comprising a reservoir (14) and a pump (16) actuated by a pusher (18), said pusher being linked to a piston (24) movable inside a pump body ( 22), characterized in that said pump body comprises a tubular part (26) of smaller section than that of the reservoir, housing the piston and an annular spacer (28) by which it is mounted tight against the internal wall of the reservoir so as to provide an annular chamber (32) for said product between the exterior surface of said tubular part and the interior surface of said reservoir, in that a metering chamber (20), cylindrical, communicating with said annular chamber, is located at bottom of said tank, in that said piston (24) engages and slides in leaktight manner in said metering chamber when said pusher is actuated, and in that a discharge valve (58) is arranged in said piston.
2. Distributeur selon la revendication 1, caractérisé en ce que la paroi dudit corps de pompe comporte des passages (40) ménagés au voisinage de son extrémité interne pour permettre l'écoulement dudit produit entre ladite chambre annulaire (32) et ladite chambre de dosage (20), dans une position du piston ou celui-ci est rétracté à l'intérieur dudit corps de pompe.2. Dispenser according to claim 1, characterized in that the wall of said pump body has passages (40) formed in the vicinity of its internal end to allow the flow of said product between said annular chamber (32) and said metering chamber (20), in a position of the piston where the latter is retracted inside said pump body.
3. Distributeur selon l'une des revendications précédentes, caractérisé en ce que l'extrémité interne dudit piston comporte une jupe tronconique (42) en matériau souple, dimensionnée pour que son bord libre (43) puisse coulisser de façon étanche dans ladite chambre de dosage.3. Dispenser according to one of the preceding claims, characterized in that the internal end of said piston comprises a frustoconical skirt (42) of flexible material, dimensioned so that its free edge (43) can slide in leaktight manner in said chamber. dosage.
4. Distributeur selon la revendication 3, caractérisé en ce que la surface extérieure de ladite jupe tronconique (42) vient en contact de butée avec un bord circulaire (48) défini dans le corps de pompe, sous la sollicitation d'un ressort (45), les passages (40) ménagés entre ladite chambre annulaire et ladite chambre de dosage étant ouverts dans^ cette position rétractée dudit piston.4. Distributor according to claim 3, characterized in that the outer surface of said frustoconical skirt (42) comes into abutment contact with a circular edge (48) defined in the pump body, under the bias of a spring (45 ), the passages (40) provided between said annular chamber and said measuring chamber being open in ^ this retracted position of said piston.
5. Distributeur selon l'une des revendications 3 ou 4, caractérisé en ce que ledit piston comporte une tige rigide (52) montée à force dans un manchon axial dudit poussoir, en ce que ladite jupe tronconique est prolongée par une portion tubulaire (56) venue de moulage et montée sur ladite tige et en ce qu'un clapet de refoulement (58) est formé entre une extrémité libre élargie (59) de ladite tige (52) et une nervure annulaire (60) faisant saillie à la surface interne de ladite jupe tronconique et en ce qu'un canal d'évacuation est agencé entre ledit clapet de refoulement et un orifice de sortie (62) défini dans ledit poussoir.5. Distributor according to one of claims 3 or 4, characterized in that said piston comprises a rigid rod (52) force-fitted into an axial sleeve of said pusher, in that said frustoconical skirt is extended by a tubular portion (56) molded and mounted on said rod and in that a discharge valve (58) is formed between an enlarged free end (59) of said rod (52) and an annular rib (60 ) protruding from the internal surface of said frustoconical skirt and in that a discharge channel is arranged between said discharge valve and an outlet orifice (62) defined in said pusher.
6. Distributeur selon la revendication 5, caractérisé en ce que ladite extrémité libre (59) de ladite tige est tronconique et en ce qu'elle s'étend à l'intérieur de ladite jupe tronconique (42). 6. Distributor according to claim 5, characterized in that said free end (59) of said rod is frustoconical and in that it extends inside said frustoconical skirt (42).
7. Distributeur selon l'une des revendications 5 ou 6, caractérisé en ce que ledit piston est monté coulissant sur ladite tige avec une course h prédéterminée.7. Distributor according to one of claims 5 or 6, characterized in that said piston is slidably mounted on said rod with a predetermined stroke h.
8. Distributeur selon l'une des revendications 5 ou 6, caractérisé en ce que ledit piston est fixé sur la tige et en ce que ladite jupe tronconique est en matériau souple déformable.8. Distributor according to one of claims 5 or 6, characterized in that said piston is fixed on the rod and in that said frustoconical skirt is made of flexible deformable material.
9. Distributeur selon l'une des revendications précédentes, caractérisé en ce que ledit corps de pompe comporte une coupelle cylindrique (29) qui vient s'emboîter axialement à son extrémité interne pour délimiter ladite chambre de dosage (20). 9. Dispenser according to one of the preceding claims, characterized in that said pump body comprises a cylindrical cup (29) which comes to axially fit at its internal end to delimit said metering chamber (20).
10. Distributeur selon l'une des revendications 1 à 9, caractérisé en ce que l'extrémité interne dudit corps de pompe est ouverte et vient en butée contre le fond du réservoir.10. Distributor according to one of claims 1 to 9, characterized in that the internal end of said pump body is open and abuts against the bottom of the tank.
11. Distributeur selon l'une des revendications 1 à 9, caractérisé en ce que ledit réservoir (14) comporte un épaulement annulaire (38) défini entre ladite chambre annulaire et ladite chambre de dosage et en ce que le corps de pompe est en butée contre cet épaulement.11. Dispenser according to one of claims 1 to 9, characterized in that said reservoir (14) has an annular shoulder (38) defined between said annular chamber and said metering chamber and in that the pump body is in abutment against this shoulder.
12. Distributeur selon l'une des revendications précédentes, caractérisé en ce que ledit piston est guidé en coulissement dans un alésage (50) du corps de pompe. 12. Distributor according to one of the preceding claims, characterized in that said piston is guided in sliding in a bore (50) of the pump body.
13. Distributeur selon l'une des revendications précédentes, caractérisé en ce que ledit poussoir comporte une jupe latérale (70) engagée dans l'ouverture dudit réservoir avec recouvrement radial faible contrôlé entre la paroi externe de ladite jupe latérale et la paroi intérieure dudit réservoir, contre laquelle ladite entretoise annulaire (28) est montée serrée pour assurer le positionnement dudit corps de pompe à l'intérieur dudit réservoir. 13. Dispenser according to one of the preceding claims, characterized in that said pusher comprises a side skirt (70) engaged in the opening of said tank with low radial overlap controlled between the outer wall of said side skirt and the inner wall of said tank , against which said annular spacer (28) is mounted tight to ensure the positioning of said pump body inside said tank.
EP04722848A 2003-03-27 2004-03-24 Product distributor comprising a pump operated by a plunger Revoked EP1606192B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0303755 2003-03-27
FR0303755A FR2852934B1 (en) 2003-03-27 2003-03-27 PRODUCT DISPENSER COMPRISING A PUSH-ACTUATING PUMP
PCT/EP2004/003116 WO2004085286A1 (en) 2003-03-27 2004-03-24 Product distributor comprising a pump operated by a plunger

Publications (2)

Publication Number Publication Date
EP1606192A1 true EP1606192A1 (en) 2005-12-21
EP1606192B1 EP1606192B1 (en) 2007-10-17

Family

ID=32947203

Family Applications (1)

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EP04722848A Revoked EP1606192B1 (en) 2003-03-27 2004-03-24 Product distributor comprising a pump operated by a plunger

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US (1) US7243821B2 (en)
EP (1) EP1606192B1 (en)
JP (1) JP2006521247A (en)
CN (1) CN1767987A (en)
AT (1) ATE375937T1 (en)
BR (1) BRPI0409025A (en)
CA (1) CA2519525A1 (en)
DE (1) DE602004009551T2 (en)
ES (1) ES2294484T3 (en)
FR (1) FR2852934B1 (en)
MX (1) MXPA05010153A (en)
WO (1) WO2004085286A1 (en)

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Also Published As

Publication number Publication date
FR2852934B1 (en) 2005-12-23
EP1606192B1 (en) 2007-10-17
DE602004009551T2 (en) 2008-07-31
MXPA05010153A (en) 2005-11-16
CA2519525A1 (en) 2004-10-07
FR2852934A1 (en) 2004-10-01
BRPI0409025A (en) 2006-03-28
WO2004085286A1 (en) 2004-10-07
ATE375937T1 (en) 2007-11-15
CN1767987A (en) 2006-05-03
US20060065675A1 (en) 2006-03-30
DE602004009551D1 (en) 2007-11-29
WO2004085286A8 (en) 2006-01-19
JP2006521247A (en) 2006-09-21
US7243821B2 (en) 2007-07-17
ES2294484T3 (en) 2008-04-01

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