EP2004333A1 - Fluid product dispensing pump - Google Patents

Fluid product dispensing pump

Info

Publication number
EP2004333A1
EP2004333A1 EP07731781A EP07731781A EP2004333A1 EP 2004333 A1 EP2004333 A1 EP 2004333A1 EP 07731781 A EP07731781 A EP 07731781A EP 07731781 A EP07731781 A EP 07731781A EP 2004333 A1 EP2004333 A1 EP 2004333A1
Authority
EP
European Patent Office
Prior art keywords
pump
piston
fluid
pump chamber
bypass passage
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
EP07731781A
Other languages
German (de)
French (fr)
Other versions
EP2004333B1 (en
Inventor
Samuel Pruvot
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aptar France SAS
Original Assignee
Valois SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valois SAS filed Critical Valois SAS
Publication of EP2004333A1 publication Critical patent/EP2004333A1/en
Application granted granted Critical
Publication of EP2004333B1 publication Critical patent/EP2004333B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1001—Piston pumps
    • B05B11/1004—Piston pumps comprising a movable cylinder and a stationary piston
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1001—Piston pumps
    • B05B11/1016—Piston pumps the outlet valve having a valve seat located downstream a movable valve element controlled by a pressure actuated controlling element
    • 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
    • B05B11/1061—Pump priming means
    • B05B11/1063—Air exhausted from the pump chamber being discharged into the container during priming

Definitions

  • the present invention relates to a fluid dispenser pump and a fluid dispenser device comprising such a pump.
  • Fluid dispensing pumps are well known in the state of the art, in particular for dispensing fluid, liquid or pasty products in the fields of cosmetics, perfumery or pharmacy. They generally comprise a piston sliding in a pump body, more particularly in a pump chamber provided in this pump body, and adapted to dispense a dose of fluid product with each actuation of the pump.
  • the pump chamber generally comprises an inlet valve to enable the dose of product expelled to be defined at each actuation.
  • some pumps sometimes incorporate shutters at the dispensing orifice, to prevent contamination of the product between two actuations. A problem with this type of pump is priming.
  • the pump chamber is filled with air, and it is therefore necessary to expel this air completely to allow filling of said pump chamber with fluid and allow dosing accurate and reproducible with each actuation of the pump. Priming is made all the more complicated as the pump has a shutter. It is difficult to expel the air contained in the pump chamber out of it, in particular because of the presence of said shutter.
  • the present invention aims to provide a fluid dispensing pump that does not reproduce the aforementioned drawbacks.
  • the present invention aims to provide a fluid dispensing pump which avoids any risk of blockage of the pump, in particular by avoiding an excessive increase in the vacuum in the tank relative to that in the pump chamber.
  • the present invention also aims to provide a fluid dispenser pump that is simple and inexpensive to manufacture and assemble.
  • the present invention therefore relates to a fluid dispenser pump comprising a pump body, a pump chamber, at least a first piston sliding in said pump chamber between a rest position and a position actuated to dispense the fluid product. , and a dispensing orifice, said pump chamber having an inlet valve separating the pump chamber from a channel extending to a fluid reservoir, a bypass passage being provided between said channel and said pump chamber said bypass passage being disposed upstream of said inlet valve, said bypass passage connecting the pump chamber to the reservoir in the actuated position of the piston.
  • the inlet valve comprises a valve seat secured to the first piston and a valve element, said first piston sliding in a sealed manner in said pump body, said pump body having at least one opening cooperating with the first piston in actuated position to open said bypass passage and allow pressure equalization between the pump chamber and the reservoir.
  • said pump comprises a dispensing head incorporating said dispensing orifice.
  • said pump comprises a shutter displaceable and / or deformable between a closed position of the dispensing orifice and an open position of the dispensing orifice.
  • said shutter comprises at least one second piston cooperating sealingly with the head in any position.
  • the pump body is made of a one-piece piece with said shutter.
  • said shutter is biased elastically, in particular by a spring, towards its closed position and is moved and / or deformed towards its open position by the pressure of the product contained in the pump chamber.
  • valve element is a ball.
  • a single spring urges said first piston towards its rest position and said shutter towards its closed position.
  • said spring is out of contact with the fluid product.
  • said first piston and said valve seat are made integrally with a fastening element such as a snap ring, crimpable or screwable, adapted to fix said pump on a fluid reservoir.
  • a fastening element such as a snap ring, crimpable or screwable
  • said first piston is integral with a hollow rod at least partially forming said channel, said inlet valve and said bypass passage.
  • said hollow rod is connected to a dip tube extending into said tank.
  • said hollow rod comprises on its outer surface, between said bypass passage and said first piston, passage means ensuring a connection between the pump chamber and the bypass passage in the actuated position of the first piston, independently of the deformation of the components of the pump under the effect of the depression generated at each actuation.
  • said passage means comprise at least one groove and / or rib.
  • FIG. a schematic cross-sectional view of a fluid dispensing device comprising a pump according to an advantageous embodiment of the present invention, in the actuated position; and FIG. 2 is an enlarged detail view of part A of FIG. 1.
  • the dispensing pump according to the present invention comprises a pump body 10 in which at least a first piston 72 slides between a rest position and an actuated position (shown in the figures).
  • This first piston 72 partially defines a pump chamber 20 and the actuation of the pump causes the dispensing of a dose of product contained in the pump chamber 20 through a dispensing orifice 45, preferably formed in a pump head. Distribution 40.
  • the pump may advantageously comprise a shutter 38, disposed directly upstream of the dispensing orifice 45, and cooperating with it by being displaceable and / or deformable between a closed position of the dispensing orifice 45 and an open position thereof.
  • the pump chamber 20 comprises an inlet valve 70, which may be in the form of a ball 75 forming a valve element and cooperating with a valve seat 71.
  • the valve element 75 is shown in the form of a ball, but it could be realized in a different way.
  • the pump body 10 is preferably formed of a one-piece piece with the shutter 38, inside thereof.
  • the piston 72 and the valve seat 71 are integral with a hollow rod 118 which may also incorporate a fixing ring 15 adapted to fix the pump on a reservoir 60 containing the fluid, advantageously with the interposition of a gasket. 65.
  • the hollow rod 118 defines a channel 18 extending towards the tank 60.
  • a dip tube 218, intended to extend to the bottom of the reservoir 60 to distribute all the product it contains, can also be connected or made in one piece with said hollow rod 118.
  • the pump has only one spring 50 adapted to return the first piston 72 to its rest position and the shutter 38 to its closed position after each actuation.
  • This spring 50 is advantageously out of contact with the fluid, which eliminates any risk of alteration of the fluid in question.
  • the shutter 38 slides axially between its open and closed positions in a sleeve 150 provided in the bottom of the actuating head 40.
  • a spraying profile (not shown) is preferably made in said sleeve to enable a swirling of the product at the time of its expulsion, to form a spray.
  • said shutter 38 comprises at least one second piston 34 cooperating sealingly with the dispensing head 40, in all positions.
  • the shutter 38 comprises a second piston 34 making it possible to isolate the spring 50 and a third piston 35 defining the pump chamber 20.
  • a bypass passage 74 is provided between the channel 18 and the pump chamber 20, upstream of the inlet valve 70.
  • This bypass passage 74 makes it possible on the one hand to connect the pump chamber 20 to the channel 18 during the priming the pump.
  • this bypass passage 74 can be made in the form of a lateral bore made in the valve seat 71 upstream of the valve member 75.
  • the valve seat 71 is then advantageously arranged upstream of the first piston. 72, which slides in a sealed manner in said pump body 10, the latter comprising at least one opening 32 adapted to cooperate with said first piston 72 during priming.
  • the bypass passage 74 also makes it possible to connect the pump chamber 20 to the channel 18 and therefore to the reservoir 60, when the first piston 72 reaches its actuated position. This makes it possible to balance the pressures in the pump chamber 20 and in the reservoir 60, and thus prevents the relative increase of the vacuum in the tank relative to that in the pump chamber, which would otherwise risk blocking the pump. by preventing the opening of the inlet valve 70 of the pump chamber.
  • passage means 200 are provided to ensure the connection between the pump chamber 20 and the bypass passage 74, in the actuated position of the first piston 72.
  • These passage means may comprise one or more grooves and / or ribs, and more generally any type of profile.
  • these passage means 200 are formed on the outer surface of the inner rod 118 whose upper end forms the first piston 72.
  • these passage means 200 are provided between the bypass passage 74 and said at least one opening 32 of the pump body 10. The presence of these passage means 200 prevents clogging or plugging of the passage due for example to the natural deformation of certain components of the pump, which can occur under the effect of the depression generated at each actuation.
  • the present invention therefore provides a pump that does not present a risk of blockage.
  • the bypass passage 74 provided upstream of the inlet valve 70 of the pump chamber 20 thus provides a dual function, namely on the one hand an air discharge passage during priming, and secondly a balancing passage of the pressures between the pump chamber and the reservoir after each actuation, to ensure proper operation of the pump.
  • the plunger tube 18 could be made in one piece with the fixing element 15 which fixes the pump on the reservoir 60 and / or with the hollow rod 118.
  • the shapes of the shutter 38, the body 10 of the pump, the first piston 72, the inlet valve 70 of the pump chamber 20 or the other elements could be made differently if necessary.
  • Other modifications are also conceivable for those skilled in the art without departing from the scope of the present invention as defined by the appended claims.

Abstract

The invention concerns a fluid product dispensing pump comprising a pump body (10), a pump chamber (20), at least one first plunger (72) sliding in said pump chamber (20) between an inactive position and an actuated position for dispensing the fluid product, and a dispensing orifice (45), said pump chamber comprising an input valve (70) separating the pump chamber (20) from a channel (18) extending towards a fluid product reservoir (60), a bypass passage (74) being provided between said channel (18) and said pump chamber (20), said bypass passage (74) being arranged upstream of said input valve (70), said bypass passage connecting the pump chamber (20) to the reservoir (60) when the plunger (72) is in actuated position.

Description

Pompe de distribution de produit fluide Fluid dispensing pump
La présente invention concerne une pompe de distribution de produit fluide et un dispositif de distribution de produit fluide comportant une telle pompe.The present invention relates to a fluid dispenser pump and a fluid dispenser device comprising such a pump.
Les pompes de distribution de produit fluide sont bien connues dans l'état de la technique, notamment pour distribuer des produits fluides, liquides ou pâteux dans les domaines de la cosmétique, de la parfumerie ou de la pharmacie. Elles comportent généralement un piston coulissant dans un corps de pompe, plus particulièrement dans une chambre de pompe prévue dans ce corps de pompe, et adapté à distribuer une dose de produit fluide à chaque actionnement de la pompe. La chambre de pompe comporte généralement un clapet d'entrée pour permettre de définir la dose de produit expulsée à chaque actionnement. Par ailleurs, notamment avec les produits pharmaceutiques, certaines pompes incorporent parfois des obturateurs au niveau de l'orifice de distribution, pour éviter toute contamination du produit entre deux actionnements. Un problème qui se pose avec ce type de pompe concerne l'amorçage. En effet, avant le premier actionnement de la pompe, la chambre de pompe est remplie d'air, et il est donc nécessaire d'expulser cet air en totalité pour permettre un remplissage de ladite chambre de pompe avec du produit fluide et permettre un dosage précis et reproductible à chaque actionnement de la pompe. L'amorçage est rendu d'autant plus compliqué que la pompe comporte un obturateur. Il est difficile d'expulser l'air contenu dans la chambre de pompe hors de celle-ci, notamment en raison de la présence dudit obturateur.Fluid dispensing pumps are well known in the state of the art, in particular for dispensing fluid, liquid or pasty products in the fields of cosmetics, perfumery or pharmacy. They generally comprise a piston sliding in a pump body, more particularly in a pump chamber provided in this pump body, and adapted to dispense a dose of fluid product with each actuation of the pump. The pump chamber generally comprises an inlet valve to enable the dose of product expelled to be defined at each actuation. Moreover, especially with pharmaceutical products, some pumps sometimes incorporate shutters at the dispensing orifice, to prevent contamination of the product between two actuations. A problem with this type of pump is priming. Indeed, before the first actuation of the pump, the pump chamber is filled with air, and it is therefore necessary to expel this air completely to allow filling of said pump chamber with fluid and allow dosing accurate and reproducible with each actuation of the pump. Priming is made all the more complicated as the pump has a shutter. It is difficult to expel the air contained in the pump chamber out of it, in particular because of the presence of said shutter.
Un autre problème qui peut se poser avec les pompes de distribution de produit fluide concerne la qualité du spray, lorsqu'il s'agit d'une pompe de pulvérisation. En effet, particulièrement lorsqu'il y a un obturateur prévu au niveau de l'orifice de distribution, la qualité et les caractéristiques du spray au moment de l'expulsion sont dépendantes dudit obturateur. Or, la plupart de ces obturateurs étant déplacés par la pression du produit créée lors de l'actionnement, des actionnements avec des intensités ou des forces axiales différentes peuvent provoquer des modifications au niveau des caractéristiques du spray. En particulier dans les pompes dans lesquelles l'obturateur se déplace axialement en éloignement de l'orifice de distribution lors de l'actionnement de la pompe, un déplacement trop important dudit obturateur risque de provoquer une perte de qualité du spray, et par conséquent une mauvaise distribution de la dose.Another problem that may arise with fluid dispensing pumps is the quality of the spray, when it is a spray pump. Indeed, particularly when there is a shutter provided at the dispensing orifice, the quality and characteristics of the spray at the time of expulsion are dependent on said shutter. However, most of these shutters being displaced by the pressure of the product created during actuation, actuations with intensities or axial forces may cause changes in the characteristics of the spray. In particular in pumps in which the shutter moves axially away from the dispensing orifice during the actuation of the pump, excessive displacement of said shutter may cause a loss of quality of the spray, and therefore a poor dose distribution.
Un autre problème qui peut aussi se poser avec les pompes de distribution de produit fluide concerne le risque de blocage de la pompe. En particulier, ce risque peut survenir avec les pompes à dépression fonctionnant sans reprise d'air extérieur si la dépression dans le réservoir de produit dépasse celle que la chambre de pompe ou de dosage est capable de générer lorsque la pompe revient vers sa position de repos après un actionnement. Le clapet d'entrée de la chambre de pompe peut alors se bloquer et ainsi bloquer la pompe dans son ensemble. Dans ce cas, le pouvoir d'aspiration naturel de la pompe est insuffisant pour contrer la dépression du réservoir, si ce niveau de dépression n'est pas systématiquement retransmis à la chambre de pompe après chaque actionnement. Or, au fur et à mesure qu'une pompe est utilisée, certaines de ses pièces constitutives, réalisées généralement en matière plastique plus ou moins rigide, risquent de se déformer naturellement sous l'effet de la dépression et ainsi sont susceptibles d'engendrer cette augmentation relative désavantageuse de la dépression dans le réservoir par rapport à celle de la chambre de pompe.Another problem that can also arise with fluid dispensing pumps concerns the risk of blockage of the pump. In particular, this risk can occur with vacuum pumps operating without external air intake if the vacuum in the product tank exceeds that which the pump or metering chamber is able to generate when the pump returns to its rest position after an actuation. The inlet valve of the pump chamber can then become blocked and thus block the pump as a whole. In this case, the natural suction power of the pump is insufficient to counter the depression of the tank, if this vacuum level is not systematically retransmitted to the pump chamber after each actuation. However, as a pump is used, some of its constituent parts, generally made of plastic more or less rigid, may deform naturally under the effect of depression and are likely to cause this. relative disadvantageous increase of the depression in the tank compared to that of the pump chamber.
La présente invention a pour but de fournir une pompe de distribution de produit fluide qui ne reproduit pas les inconvénients susmentionnés.The present invention aims to provide a fluid dispensing pump that does not reproduce the aforementioned drawbacks.
Plus particulièrement, la présente invention a pour but de fournir une pompe de distribution de produit fluide qui évite tout risque de blocage de la pompe, notamment en évitant une augmentation excessive de la dépression dans le réservoir par rapport à celle dans la chambre de pompe.More particularly, the present invention aims to provide a fluid dispensing pump which avoids any risk of blockage of the pump, in particular by avoiding an excessive increase in the vacuum in the tank relative to that in the pump chamber.
La présente invention a aussi pour but de fournir une pompe de distribution de produit fluide qui permet de réaliser un amorçage sûr et fiable de manière simple et peu coûteuse. La présente invention a également pour but de fournir une pompe de distribution de produit fluide qui garantit un spray de pulvérisation à chaque actionnement de la pompe, indépendamment de la force que l'utilisateur exerce sur celle-ci lors de son actionnement. La présente invention a aussi pour objet de fournir une pompe de distribution de produit fluide qui soit simple et peu coûteuse à fabriquer et à assembler.The present invention also aims to provide a fluid dispensing pump that allows a safe and reliable priming in a simple and inexpensive way. Another object of the present invention is to provide a fluid dispenser pump which guarantees a spray spray each time the pump is actuated, regardless of the force that the user exerts on it when it is actuated. The present invention also aims to provide a fluid dispenser pump that is simple and inexpensive to manufacture and assemble.
La présente invention a donc pour objet une pompe de distribution de produit fluide comportant un corps de pompe, une chambre de pompe, au moins un premier piston coulissant dans ladite chambre de pompe entre une position de repos et une position actionnée pour distribuer le produit fluide, et un orifice de distribution, ladite chambre de pompe comportant un clapet d'entrée séparant la chambre de pompe d'un canal s'étendant vers un réservoir de produit fluide, un passage de dérivation étant prévu entre ledit canal et ladite chambre de pompe, ledit passage de dérivation étant disposé en amont dudit clapet d'entrée, ledit passage de dérivation reliant la chambre de pompe au réservoir en position actionnée du piston.The present invention therefore relates to a fluid dispenser pump comprising a pump body, a pump chamber, at least a first piston sliding in said pump chamber between a rest position and a position actuated to dispense the fluid product. , and a dispensing orifice, said pump chamber having an inlet valve separating the pump chamber from a channel extending to a fluid reservoir, a bypass passage being provided between said channel and said pump chamber said bypass passage being disposed upstream of said inlet valve, said bypass passage connecting the pump chamber to the reservoir in the actuated position of the piston.
Avantageusement, le clapet d'entrée comporte un siège de clapet solidaire du premier piston et un élément de clapet, ledit premier piston coulissant de manière étanche dans ledit corps de pompe, ledit corps de pompe comportant au moins une ouverture coopérant avec le premier piston en position actionnée pour ouvrir ledit passage de dérivation et permettre une égalisation de pression entre la chambre de pompe et le réservoir.Advantageously, the inlet valve comprises a valve seat secured to the first piston and a valve element, said first piston sliding in a sealed manner in said pump body, said pump body having at least one opening cooperating with the first piston in actuated position to open said bypass passage and allow pressure equalization between the pump chamber and the reservoir.
Avantageusement, ladite pompe comporte une tête de distribution incorporant ledit orifice de distribution.Advantageously, said pump comprises a dispensing head incorporating said dispensing orifice.
Avantageusement, ladite pompe comporte un obturateur déplaçable et/ou déformable entre une position d'obturation de l'orifice de distribution et une position d'ouverture de l'orifice de distribution.Advantageously, said pump comprises a shutter displaceable and / or deformable between a closed position of the dispensing orifice and an open position of the dispensing orifice.
Avantageusement, ledit obturateur comporte au moins un second piston coopérant de manière étanche avec la tête en toute position. Avantageusement, le corps de pompe est réalisé d'une pièce monobloc avec ledit obturateur.Advantageously, said shutter comprises at least one second piston cooperating sealingly with the head in any position. Advantageously, the pump body is made of a one-piece piece with said shutter.
Avantageusement, ledit obturateur est sollicité élastiquement, notamment par un ressort, vers sa position d'obturation et est déplacé et/ou déformé vers sa position d'ouverture par la pression du produit contenu dans la chambre de pompe.Advantageously, said shutter is biased elastically, in particular by a spring, towards its closed position and is moved and / or deformed towards its open position by the pressure of the product contained in the pump chamber.
Avantageusement, l'élément de clapet est une bille.Advantageously, the valve element is a ball.
Avantageusement, un seul ressort sollicite ledit premier piston vers sa position de repos et ledit obturateur vers sa position d'obturation. Avantageusement, ledit ressort est hors de tout contact avec le produit fluide.Advantageously, a single spring urges said first piston towards its rest position and said shutter towards its closed position. Advantageously, said spring is out of contact with the fluid product.
Avantageusement, ledit premier piston et ledit siège de clapet sont réalisés de manière monobloc avec un élément de fixation tel qu'une bague encliquetable, sertissable ou vissable, adapté à fixer ladite pompe sur un réservoir de produit fluide.Advantageously, said first piston and said valve seat are made integrally with a fastening element such as a snap ring, crimpable or screwable, adapted to fix said pump on a fluid reservoir.
Avantageusement, ledit premier piston est solidaire d'une tige creuse formant au moins partiellement ledit canal, ledit clapet d'entrée et ledit passage de dérivation.Advantageously, said first piston is integral with a hollow rod at least partially forming said channel, said inlet valve and said bypass passage.
Avantageusement, ladite tige creuse est reliée à un tube plongeur s'étendant dans ledit réservoir.Advantageously, said hollow rod is connected to a dip tube extending into said tank.
Avantageusement, ladite tige creuse comporte sur sa surface externe, entre ledit passage de dérivation et ledit premier piston, des moyens de passage garantissant une liaison entre la chambre de pompe et le passage de dérivation en position actionnée du premier piston, indépendamment de la déformation des composants de la pompe sous l'effet de la dépression générée à chaque actionnement.Advantageously, said hollow rod comprises on its outer surface, between said bypass passage and said first piston, passage means ensuring a connection between the pump chamber and the bypass passage in the actuated position of the first piston, independently of the deformation of the components of the pump under the effect of the depression generated at each actuation.
Avantageusement, lesdits moyens de passage comportent au moins un rainure et/ou nervure.Advantageously, said passage means comprise at least one groove and / or rib.
La présente invention a aussi pour objet un dispositif de distribution de produit fluide comportant un réservoir de produit fluide et une pompe telle que décrite ci-dessus. D'autres caractéristiques et avantages de la présente invention apparaîtront plus clairement au cours de la description détaillée suivante de celle- ci, faite en référence aux dessins joints, donnés à titre d'exemples non limitatifs, et sur lesquels : - la figure 1 est une vue schématique en section transversale d'un dispositif de distribution de produit fluide comportant une pompe selon un mode de réalisation avantageux de la présente invention, en position actionnée ; et - la figure 2 est une vue de détail agrandie de la partie A de la figure 1. En référence aux figures, la pompe de distribution selon la présente invention comporte un corps de pompe 10 dans lequel coulisse au moins un premier piston 72 entre une position de repos et une position actionnée (représentée sur les figures). Ce premier piston 72 définit en partie une chambre de pompe 20 et l'actionnement de la pompe provoque la distribution d'une dose de produit contenue dans la chambre de pompe 20 à travers un orifice de distribution 45, de préférence formé dans une tête de distribution 40. La pompe peut comporter avantageusement un obturateur 38, disposé directement en amont de l'orifice de distribution 45, et coopérant avec celui-ci en étant déplaçable et/ou déformable entre une position d'obturation de l'orifice de distribution 45 et une position d'ouverture de celui-ci. La chambre de pompe 20 comporte un clapet d'entrée 70, qui peut être réalisé sous la forme d'une bille 75 formant un élément de clapet et coopérant avec un siège de clapet 71. L'élément de clapet 75 est représenté sous la forme d'une bille, mais il pourrait être réalisé de manière différente. Le corps de pompe 10 est de préférence formé d'une pièce monobloc avec l'obturateur 38, à l'intérieur de celui-ci. Avantageusement, le piston 72 et le siège de clapet 71 sont solidaire d'une tige creuse 118 qui peut aussi incorporer une bague de fixation 15 adaptée à fixer la pompe sur un réservoir 60 contenant le produit fluide, avantageusement avec interposition d'un joint d'étanchéité 65. La tige creuse 118 définit un canal 18 s'étendant vers le réservoir 60. Un tube plongeur 218, destiné à s'étendre jusqu'au fond du réservoir 60 pour distribuer la totalité du produit qu'il contient, peut également être connecté ou réalisé de manière monobloc avec ladite tige creuse 118.The present invention also relates to a fluid dispenser device comprising a fluid reservoir and a pump as described above. Other features and advantages of the present invention will appear more clearly in the following detailed description thereof, with reference to the accompanying drawings, given by way of non-limiting examples, and in which: FIG. a schematic cross-sectional view of a fluid dispensing device comprising a pump according to an advantageous embodiment of the present invention, in the actuated position; and FIG. 2 is an enlarged detail view of part A of FIG. 1. Referring to the figures, the dispensing pump according to the present invention comprises a pump body 10 in which at least a first piston 72 slides between a rest position and an actuated position (shown in the figures). This first piston 72 partially defines a pump chamber 20 and the actuation of the pump causes the dispensing of a dose of product contained in the pump chamber 20 through a dispensing orifice 45, preferably formed in a pump head. Distribution 40. The pump may advantageously comprise a shutter 38, disposed directly upstream of the dispensing orifice 45, and cooperating with it by being displaceable and / or deformable between a closed position of the dispensing orifice 45 and an open position thereof. The pump chamber 20 comprises an inlet valve 70, which may be in the form of a ball 75 forming a valve element and cooperating with a valve seat 71. The valve element 75 is shown in the form of a ball, but it could be realized in a different way. The pump body 10 is preferably formed of a one-piece piece with the shutter 38, inside thereof. Advantageously, the piston 72 and the valve seat 71 are integral with a hollow rod 118 which may also incorporate a fixing ring 15 adapted to fix the pump on a reservoir 60 containing the fluid, advantageously with the interposition of a gasket. 65. The hollow rod 118 defines a channel 18 extending towards the tank 60. A dip tube 218, intended to extend to the bottom of the reservoir 60 to distribute all the product it contains, can also be connected or made in one piece with said hollow rod 118.
Avantageusement, la pompe ne comporte qu'un seul ressort 50 adapté à ramener le premier piston 72 vers sa position de repos et l'obturateur 38 vers sa position d'obturation après chaque actionnement. Ce ressort 50 est avantageusement hors de tout contact avec le produit fluide, ce qui élimine tout risque d'altération du produit fluide en question. Avantageusement, l'obturateur 38 coulisse axialement entre ses positions d'ouverture et de fermeture dans un manchon 150 prévu dans le fond de la tête d'actionnement 40. Un profil de pulvérisation (non représenté) est de préférence réalisé dans ledit manchon pour permettre un tourbillonnement du produit au moment de son expulsion, pour former un spray.Advantageously, the pump has only one spring 50 adapted to return the first piston 72 to its rest position and the shutter 38 to its closed position after each actuation. This spring 50 is advantageously out of contact with the fluid, which eliminates any risk of alteration of the fluid in question. Advantageously, the shutter 38 slides axially between its open and closed positions in a sleeve 150 provided in the bottom of the actuating head 40. A spraying profile (not shown) is preferably made in said sleeve to enable a swirling of the product at the time of its expulsion, to form a spray.
Avantageusement, ledit obturateur 38 comporte au moins un second piston 34 coopérant de manière étanche avec la tête de distribution 40, en toutes positions. Avantageusement, l'obturateur 38 comporte un second piston 34 permettant d'isoler le ressort 50 et un troisième piston 35 définissant la chambre de pompe 20.Advantageously, said shutter 38 comprises at least one second piston 34 cooperating sealingly with the dispensing head 40, in all positions. Advantageously, the shutter 38 comprises a second piston 34 making it possible to isolate the spring 50 and a third piston 35 defining the pump chamber 20.
Un passage de dérivation 74 est prévu entre le canal 18 et la chambre de pompe 20, en amont du clapet d'entrée 70. Ce passage de dérivation 74 permet d'une part de relier la chambre de pompe 20 au canal 18 lors de l'amorçage de la pompe. En particulier, ce passage de dérivation 74 peut être réalisé sous la forme d'un alésage latéral réalisé dans le siège de clapet 71 en amont de l'élément de clapet 75. Le siège de clapet 71 est alors avantageusement disposé en amont du premier piston 72, qui coulisse de manière étanche dans ledit corps de pompe 10, celui-ci comportant au moins une ouverture 32 adaptée à coopérer avec ledit premier piston 72 lors de l'amorçage. On constate que lorsque l'utilisateur actionne pour la première fois la pompe et que celle-ci contient de l'air dans la chambre de pompe 20, l'air est comprimé, ce qui ferme le clapet d'entrée 70 en pressant la bille 75 contre le siège de clapet 71. L'air étant compressible, le premier piston 72 peut coulisser dans le corps de pompe 10 sans que l'obturateurA bypass passage 74 is provided between the channel 18 and the pump chamber 20, upstream of the inlet valve 70. This bypass passage 74 makes it possible on the one hand to connect the pump chamber 20 to the channel 18 during the priming the pump. In particular, this bypass passage 74 can be made in the form of a lateral bore made in the valve seat 71 upstream of the valve member 75. The valve seat 71 is then advantageously arranged upstream of the first piston. 72, which slides in a sealed manner in said pump body 10, the latter comprising at least one opening 32 adapted to cooperate with said first piston 72 during priming. It is found that when the user actuates the pump for the first time and that it contains air in the pump chamber 20, the air is compressed, which closes the inlet valve 70 by pressing the ball 75 against the valve seat 71. The air being compressible, the first piston 72 can slide in the pump body 10 without the shutter
38 ne se déplace par rapport à la tête de distribution 40. Lorsque le premier piston 72 arrive au niveau de l'ouverture 32 du corps de pompe 10, un passage est créé entre la chambre de pompe 20 et le passage de dérivation 74, ce qui permet d'expulser l'air contenu dans la chambre de pompe 20 vers le canal 18 et donc dans le réservoir 60. Après amorçage, lorsque la pompe est ramenée vers sa position de repos, du produit fluide est aspiré à l'intérieur de la chambre de pompe 20. Par la suite, le premier piston 72 ne pourra plus atteindre ladite ouverture 32 du corps de pompe pendant le fonctionnement normal de la pompe, c'est-à-dire pendant la distribution du produit, mais seulement à la fin de l'actionnement, en position actionnée du premier piston 72. Ledit clapet d'entrée 70 fonctionne alors de manière classique pour se fermer lors de l'actionnement et s'ouvrir lorsque la pompe est ramenée vers sa position de repos.38 does not move relative to the dispensing head 40. When the first piston 72 arrives at the opening 32 of the pump body 10, a passage is created between the pump chamber 20 and the bypass passage 74, which allows to expel the air contained in the pump chamber 20 to the channel 18 and therefore in the tank 60. After priming, when the pump is returned to its rest position, fluid is sucked into the pump chamber 20. Thereafter, the first piston 72 can not more reach said opening 32 of the pump body during normal operation of the pump, that is to say during the dispensing of the product, but only at the end of the actuation, in the actuated position of the first piston 72. Said valve input 70 then operates in a conventional manner to close upon actuation and open when the pump is returned to its rest position.
Selon l'invention, le passage de dérivation 74 permet également de relier la chambre de pompe 20 au canal 18 et donc au réservoir 60, lorsque le premier piston 72 atteint sa position actionnée. Ceci permet d'équilibrer les pressions dans la chambre de pompe 20 et dans le réservoir 60, et ainsi empêche l'augmentation relative de la dépression dans le réservoir par rapport à celle dans la chambre de pompe, ce qui risquerait autrement de bloquer la pompe en empêchant l'ouverture du clapet d'entrée 70 de la chambre de pompe.According to the invention, the bypass passage 74 also makes it possible to connect the pump chamber 20 to the channel 18 and therefore to the reservoir 60, when the first piston 72 reaches its actuated position. This makes it possible to balance the pressures in the pump chamber 20 and in the reservoir 60, and thus prevents the relative increase of the vacuum in the tank relative to that in the pump chamber, which would otherwise risk blocking the pump. by preventing the opening of the inlet valve 70 of the pump chamber.
Avantageusement, des moyens de passage 200 sont prévus pour garantir la liaison entre la chambre de pompe 20 et le passage de dérivation 74, en position actionnée du premier piston 72. Ces moyens de passage peuvent comprendre une ou plusieurs rainures et/ou nervures, et plus généralement tout type de profil. De préférence, ces moyens de passage 200 sont réalisés sur la surface externe de la tige interne 118 dont l'extrémité supérieure forme le premier piston 72. Avantageusement, ces moyens de passage 200 sont prévus entre le passage de dérivation 74 et ladite au moins une ouverture 32 du corps de pompe 10. La présence de ces moyens de passage 200 permet d'éviter un bouchage ou une obturation du passage en raison par exemple de la déformation naturelle de certaines pièces constitutives de la pompe, qui peut se produire sous l'effet de la dépression générée à chaque actionnement. Le fait de relier la chambre de pompe 20 avec le réservoir 60 en fin de chaque actionnement permettant d'empêcher une augmentation relative de la dépression dans le réservoir par rapport à celle de la chambre de pompe, la tendance à la déformation de certaines pièces de la pompe est aussi limitée. La présente invention fournit donc une pompe ne présentant pas de risque de blocage. Le passage de dérivation 74 prévu en amont du clapet d'entrée 70 de la chambre de pompe 20 fournit donc une double fonction, à savoir d'une part un passage de refoulement d'air lors de l'amorçage, et d'autre part un passage d'équilibrage des pressions entre la chambre de pompe et le réservoir après chaque actionnement, pour garantir un bon fonctionnement de la pompe. L'invention a été décrite en référence à un mode de réalisation particulier de celle-ci, mais il est entendu que diverses modifications pourraient y être apportées. En particulier, le tube plongeur 18 pourrait être réalisé de manière monobloc avec l'élément de fixation 15 qui fixe la pompe sur le réservoir 60 et/ou avec la tige creuse 118. De même, les formes de l'obturateur 38, du corps de pompe 10, du premier piston 72, du clapet d'entrée 70 de la chambre de pompe 20 ou des autres éléments pourraient être réalisées de manière différente si nécessaire. D'autres modifications sont également envisageables pour l'homme du métier sans sortir du cadre de la présente invention tel que défini par les revendications annexées. Advantageously, passage means 200 are provided to ensure the connection between the pump chamber 20 and the bypass passage 74, in the actuated position of the first piston 72. These passage means may comprise one or more grooves and / or ribs, and more generally any type of profile. Preferably, these passage means 200 are formed on the outer surface of the inner rod 118 whose upper end forms the first piston 72. Advantageously, these passage means 200 are provided between the bypass passage 74 and said at least one opening 32 of the pump body 10. The presence of these passage means 200 prevents clogging or plugging of the passage due for example to the natural deformation of certain components of the pump, which can occur under the effect of the depression generated at each actuation. Connecting pump chamber 20 with reservoir 60 at the end of each actuation to prevent a relative increase of the depression in the tank relative to that of the pump chamber, the tendency to deformation of some parts of the pump is also limited. The present invention therefore provides a pump that does not present a risk of blockage. The bypass passage 74 provided upstream of the inlet valve 70 of the pump chamber 20 thus provides a dual function, namely on the one hand an air discharge passage during priming, and secondly a balancing passage of the pressures between the pump chamber and the reservoir after each actuation, to ensure proper operation of the pump. The invention has been described with reference to a particular embodiment thereof, but it is understood that various modifications could be made thereto. In particular, the plunger tube 18 could be made in one piece with the fixing element 15 which fixes the pump on the reservoir 60 and / or with the hollow rod 118. Similarly, the shapes of the shutter 38, the body 10 of the pump, the first piston 72, the inlet valve 70 of the pump chamber 20 or the other elements could be made differently if necessary. Other modifications are also conceivable for those skilled in the art without departing from the scope of the present invention as defined by the appended claims.

Claims

Revendications claims
1.- Pompe de distribution de produit fluide comportant un corps de pompe (10), une chambre de pompe (20), au moins un premier piston (72) coulissant dans ladite chambre de pompe (20) entre une position de repos et une position actionnée pour distribuer le produit fluide, et un orifice de distribution (45), ladite chambre de pompe comportant un clapet d'entrée1.- Fluid dispensing pump comprising a pump body (10), a pump chamber (20), at least a first piston (72) sliding in said pump chamber (20) between a rest position and a actuated position for dispensing the fluid, and a dispensing orifice (45), said pump chamber having an inlet valve
(70) séparant la chambre de pompe (20) d'un canal (18) s'étendant vers un réservoir (60) de produit fluide, un passage de dérivation (74) étant prévu entre ledit canal (18) et ladite chambre de pompe (20), ledit passage de dérivation (74) étant disposé en amont dudit clapet d'entrée (70), caractérisé en ce que ledit passage de dérivation relie la chambre de pompe(70) separating the pump chamber (20) from a channel (18) extending to a fluid reservoir (60), a bypass passage (74) being provided between said channel (18) and said fluid chamber (18) pump (20), said bypass passage (74) being disposed upstream of said inlet valve (70), characterized in that said bypass passage connects the pump chamber
(20) au réservoir (60) en position actionnée du piston (72).(20) to the reservoir (60) in the actuated position of the piston (72).
2.- Pompe selon la revendication 1, dans laquelle le clapet d'entrée (70) comporte un siège de clapet (71) solidaire du premier piston (72) et un élément de clapet (75), ledit premier piston (72) coulissant de manière étanche dans ledit corps de pompe (10), ledit corps de pompe (10) comportant au moins une ouverture (32) coopérant avec le premier piston (72) en position actionnée pour ouvrir ledit passage de dérivation (74) et permettre une égalisation de pression entre la chambre de pompe (20) et le réservoir (60).2.- Pump according to claim 1, wherein the inlet valve (70) comprises a valve seat (71) integral with the first piston (72) and a valve member (75), said first piston (72) sliding in a sealed manner in said pump body (10), said pump body (10) having at least one opening (32) cooperating with the first piston (72) in the actuated position to open said bypass passage (74) and allow a pressure equalization between the pump chamber (20) and the reservoir (60).
3.- Pompe selon l'une quelconque des revendications précédentes, dans laquelle ladite pompe comporte une tête de distribution (40) incorporant ledit orifice de distribution (45).3. Pump according to any one of the preceding claims, wherein said pump comprises a dispensing head (40) incorporating said dispensing orifice (45).
4.- Pompe selon l'une quelconque des revendications précédentes, comportant un obturateur (38) déplaçable et/ou déformable entre une position d'obturation de l'orifice de distribution (45) et une position d'ouverture de l'orifice de distribution (45). 4. Pump according to any one of the preceding claims, comprising a shutter (38) movable and / or deformable between a closed position of the dispensing orifice (45) and an opening position of the orifice of distribution (45).
5.- Pompe selon la revendication 4, dans laquelle ledit obturateur (38) comporte au moins un second piston (34, 35) coopérant de manière étanche avec la tête (40) en toute position.5. Pump according to claim 4, wherein said shutter (38) comprises at least one second piston (34, 35) cooperating in a sealed manner with the head (40) in any position.
6.- Pompe selon la revendication 4 ou 5, dans laquelle le corps de pompe (10) est réalisé d'une pièce monobloc avec ledit obturateur (38).6. Pump according to claim 4 or 5, wherein the pump body (10) is formed integrally with said shutter (38).
7.- Pompe selon l'une quelconque des revendications 4 à 6, dans laquelle ledit obturateur (38) est sollicité élastiquement, notamment par un ressort (50), vers sa position d'obturation et est déplacé et/ou déformé vers sa position d'ouverture par la pression du produit contenu dans la chambre de pompe (20).7. Pump according to any one of claims 4 to 6, wherein said shutter (38) is resiliently biased, in particular by a spring (50) towards its closed position and is moved and / or deformed towards its position. opening by the pressure of the product contained in the pump chamber (20).
8.- Pompe selon la revendication 2, dans laquelle l'élément de clapet (75) est une bille.The pump of claim 2, wherein the valve member (75) is a ball.
9.- Pompe selon l'une quelconque des revendications précédentes, dans laquelle un seul ressort (50) sollicite ledit premier piston (72) vers sa position de repos et ledit obturateur (38) vers sa position d'obturation.9. A pump according to any one of the preceding claims, wherein a single spring (50) biases said first piston (72) to its rest position and said shutter (38) to its closed position.
10.- Pompe selon la revendication 9, dans laquelle ledit ressort (50) est hors de tout contact avec le produit fluide.The pump of claim 9, wherein said spring (50) is out of contact with the fluid.
11.- Pompe selon l'une quelconque des revendications précédentes, dans laquelle ledit premier piston (72) et ledit siège de clapet (71) sont réalisés de manière monobloc avec un élément de fixation (15), tel qu'une bague encliquetable, sertissable ou vissable, adapté à fixer ladite pompe sur un réservoir (60) de produit fluide.11. Pump according to any one of the preceding claims, wherein said first piston (72) and said valve seat (71) are made integrally with a fastening element (15), such as a snap ring, crimpable or screwable, adapted to fix said pump on a reservoir (60) of fluid.
12.- Pompe selon l'une quelconque des revendications précédentes, dans laquelle ledit premier piston (72) est solidaire d'une tige creuse (118) formant au moins partiellement ledit canal (18), ledit clapet d'entrée (70) et ledit passage de dérivation (74).12. Pump according to any one of the preceding claims, wherein said first piston (72) is integral with a hollow rod (118). at least partially forming said channel (18), said inlet valve (70) and said bypass passage (74).
13.- Pompe selon la revendication 12, dans laquelle ladite tige creuse (118) est reliée à un tube plongeur (218) s'étendant dans ledit réservoir (60).The pump of claim 12, wherein said hollow rod (118) is connected to a dip tube (218) extending into said reservoir (60).
14.- Pompe selon la revendication 12 ou 13, dans laquelle ladite tige creuse comporte sur sa surface externe, entre ledit passage de dérivation (74) et ledit premier piston (72), des moyens de passage (200) garantissant une liaison entre la chambre de pompe (20) et le passage de dérivation (74) en position actionnée du premier piston (72), indépendamment de la déformation des composants de la pompe sous l'effet de la dépression générée à chaque actionnement.14.- Pump according to claim 12 or 13, wherein said hollow rod comprises on its outer surface, between said bypass passage (74) and said first piston (72), passage means (200) ensuring a connection between the pump chamber (20) and the bypass passage (74) in the actuated position of the first piston (72), independently of the deformation of the pump components under the effect of the depression generated at each actuation.
15.- Pompe selon la revendication 14, dans laquelle lesdits moyens de passage (200) comportent au moins un rainure et/ou nervure.15.- Pump according to claim 14, wherein said passage means (200) comprise at least one groove and / or rib.
16.- Dispositif de distribution de produit fluide, comportant un réservoir (60) de produit fluide, caractérisé en ce qu'il comporte une pompe selon l'une quelconque des revendications précédentes. 16.- fluid dispensing device comprising a reservoir (60) of fluid, characterized in that it comprises a pump according to any one of the preceding claims.
EP07731781.6A 2006-03-22 2007-03-20 Fluid product dispensing pump Active EP2004333B1 (en)

Applications Claiming Priority (2)

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FR0650995A FR2898818B1 (en) 2006-03-22 2006-03-22 FLUID PRODUCT DELIVERY PUMP
PCT/FR2007/050966 WO2007107672A1 (en) 2006-03-22 2007-03-20 Fluid product dispensing pump

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EP2004333A1 true EP2004333A1 (en) 2008-12-24
EP2004333B1 EP2004333B1 (en) 2013-07-03

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JP (1) JP5260490B2 (en)
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FR2862107B1 (en) * 2003-11-07 2006-02-10 Valois Sas FLUID PRODUCT DELIVERY PUMP.
FR2892158B1 (en) * 2005-10-17 2011-10-21 Valois Sas FLUID PRODUCT DELIVERY PUMP
DE102009037164B3 (en) * 2009-08-03 2010-12-09 Ing. Erich Pfeiffer Gmbh Discharge device for liquid media
DE102011082420B4 (en) * 2011-09-09 2021-02-04 Aptar Radolfzell Gmbh Liquid dispenser and discharge head for a liquid dispenser
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FR3075650B1 (en) * 2017-12-22 2020-01-03 Aptar France Sas DEVICE FOR DISPENSING FLUID PRODUCT.
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US7780042B2 (en) 2010-08-24
JP5260490B2 (en) 2013-08-14
CN101443128A (en) 2009-05-27
WO2007107672A1 (en) 2007-09-27
JP2009530095A (en) 2009-08-27
FR2898818A1 (en) 2007-09-28
CN101443128B (en) 2011-09-07
FR2898818B1 (en) 2008-08-22
US20090255959A1 (en) 2009-10-15

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