EP1888253B1 - Air filtration device for liquid or semi-liquid product pump - Google Patents

Air filtration device for liquid or semi-liquid product pump Download PDF

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Publication number
EP1888253B1
EP1888253B1 EP06778580A EP06778580A EP1888253B1 EP 1888253 B1 EP1888253 B1 EP 1888253B1 EP 06778580 A EP06778580 A EP 06778580A EP 06778580 A EP06778580 A EP 06778580A EP 1888253 B1 EP1888253 B1 EP 1888253B1
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EP
European Patent Office
Prior art keywords
orifice
membrane
pump
liquid
filtration device
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.)
Revoked
Application number
EP06778580A
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German (de)
French (fr)
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EP1888253A1 (en
Inventor
Bernard Clerget
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.)
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Application filed by Rexam Dispensing Systems SAS filed Critical Rexam Dispensing Systems SAS
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005—Components or details
    • B05B11/0037—Containers
    • B05B11/0039—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means
    • B05B11/0044—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means
    • B05B11/00444—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means with provision for filtering or cleaning the air flow drawn into the container
    • 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
    • B05B11/0005—Components or details
    • B05B11/0037—Containers
    • B05B11/0039—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means
    • B05B11/0044—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means

Definitions

  • the present invention relates to an air filtration device for a pump equipping a liquid or semi-liquid product dispenser (see WO 03/026804 ).
  • Distributors of pharmaceuticals, cosmetics and perfumes generally include a pump mounted on a tank and actuated by a push button so as to ensure the delivery of the product.
  • Existing filtration devices generally consist of a ring of filter material mounted in radial clamping around the pump body by masking the vent orifice.
  • the present invention aims to solve the problems of the prior art.
  • This object is achieved according to the invention by means of a device according to claim 1.
  • the porosity of said membrane is between 0.05 and 0.5 microns.
  • said support element consists of a peripheral zone of said membrane located radially beyond said orifice and which is welded or glued directly to the edges of said orifice.
  • the free edge of said membrane is engaged in an overmoulded frame.
  • said frame is integral with said support member.
  • said support member is in the form of a sleeve whose outer diameter is substantially equal to the inner diameter of said orifice in which it is intended to be introduced in the manner of a plug.
  • said sleeve has a frustoconical end to facilitate its introduction into the orifice.
  • said frame has a shoulder coming into bearing contact with the wall of the pump body to position the membrane relative to said orifice.
  • said membrane is disposed inside said orifice.
  • the distributor represented on the figure 1 comprises a pump P mounted on a tank neck C where it is fixed by crimping a ring B.
  • the body K of the pump P consists of a cylindrical-conical envelope which encloses a piston mechanism surmounted by a tube-nozzle T.
  • the body K is provided with a vent orifice E formed through its wall side and disposed here above the level of the upper edge of the neck C.
  • the depression created in the reservoir causes the suction of a volume of compensation air which is taken outside by the passage defined inside the body K, in the upper part, between the tube T and the inner wall of the body and then through the vent orifice E and finally in the lower part, between the outer wall of the body and the inner wall of the neck C, as shown with the arrow path on the figure 1 .
  • the device of the invention aims to filter the air entering the tank during the return to equilibrium pressures between the inside and outside of the tank.
  • the device comprises a filter membrane 1 through which is likely to open the orifice E and whose free edge is connected to a support member sealingly attached to said orifice.
  • the membrane 1 Since the air passes from the interior of the body towards the interior volume of the tank, the membrane 1 is disposed outside the body K ( figure 4 ), at least partly inside the orifice E ( Figure 2A ).
  • the porosity of the membrane 1 is adapted to the filtration of air and is between 0.05 and 0.5 microns.
  • the body K of the pump has a flat M extending immediately around the vent port E.
  • the free edge 10 of said membrane 1 is engaged in a frame 2 where it is trapped by overmolding delimiting a central conduit 20 through which is disposed the filtering surface of the membrane.
  • the frame 2 is secured to a support member.
  • the support element is here in the form of a sleeve 21 whose outer diameter is substantially equal to the inside diameter of the orifice E in which it is intended to be introduced by fitting in the manner of a plug as shown in FIGS. Figures 2A and 2B .
  • the fixing is then ensured by a simple radial clamping and reinforced, if necessary, by gluing or welding.
  • This attachment allows the retention of the device in the orifice E of the body K even during the suction phase when the air intake.
  • the sleeve 21 has a frustoconical end 22 to facilitate its introduction into the orifice E.
  • the frame 2 has an overhanging shoulder 23 coming into bearing contact with the wall of the body K of the pump to limit the penetration of the device and correctly position the membrane 1 relative to the orifice E.
  • the length of the sleeve 21 is greater than or equal to the thickness of the wall of the body K and the membrane 1 is disposed inside the orifice E, in the thickness of the wall of the body K.
  • the membrane 1 covers the orifice E outside the pump body.
  • the support element consists of a peripheral zone 11 of the membrane 1 located radially beyond the orifice E and which is welded or glued directly on the flat M to the edges of said orifice.
  • the central portion of the membrane 1 covers the orifice E.

Landscapes

  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Closures For Containers (AREA)

Abstract

An air filtration device for the vent of a body of a pump used to fit a liquid or semi-liquid product distributor, the device including a filter membrane through which the product may be discharged from opening. The free edge of the membrane is connected to a support element which is tightly fixed on the opening.

Description

La présente invention concerne un dispositif de filtration de l'air pour une pompe équipant un distributeur de produit liquide ou semi-liquide (voir WO 03/026804 ).The present invention relates to an air filtration device for a pump equipping a liquid or semi-liquid product dispenser (see WO 03/026804 ).

Les distributeurs de produits pharmaceutiques, cosmétiques et de parfums comprennent généralement une pompe montée sur un réservoir et actionnée par un bouton-poussoir de façon à assurer la délivrance du produit.Distributors of pharmaceuticals, cosmetics and perfumes generally include a pump mounted on a tank and actuated by a push button so as to ensure the delivery of the product.

Une fois la phase de délivrance effectuée, il est nécessaire de compenser la perte du volume de produit évacué par un volume d'air équivalent qui est alors prélevé à l'extérieur du fait de la dépression régnant dans le réservoir. Cette reprise d'air s'effectue automatiquement, d'abord par les passages prévus à cet effet à l'intérieur du corps de pompe puis, via un orifice dit d'évent ménagé au travers de la paroi du corps et débouchant à l'intérieur du réservoir. La pression à l'intérieur du réservoir reste ainsi identique à celle de l'atmosphère extérieure.Once the delivery phase has been completed, it is necessary to compensate for the loss of the volume of product evacuated by an equivalent volume of air which is then taken outside due to the depression prevailing in the reservoir. This air intake is performed automatically, first through the passages provided for this purpose inside the pump body and, via an orifice said vent formed through the body wall and opening to the inside the tank. The pressure inside the tank thus remains identical to that of the outside atmosphere.

Toutefois, il est nécessaire de prévoir la filtration du flux d'air entrant ne serait ce que pour préserver les propriétés du produit et éviter les risques de pollution ou de contamination bactérienne ou fongique, en particulier pour le conditionnement de produits pharmaceutiques ou cosmétiques.However, it is necessary to provide the filtration of the incoming airflow just to preserve the properties of the product and avoid the risk of pollution or bacterial or fungal contamination, especially for the packaging of pharmaceutical or cosmetic products.

Les dispositifs de filtration existants sont généralement constitués d'une bague en matériau filtrant montée en serrage radial autour du corps de pompe en masquant l'orifice d'évent.Existing filtration devices generally consist of a ring of filter material mounted in radial clamping around the pump body by masking the vent orifice.

Cependant, cette solution n'est pas satisfaisante car la bague vient augmenter le diamètre extérieur du corps de pompe ce qui pose des problèmes d'assemblage dans le col du réservoir et des problèmes d'étanchéité.However, this solution is not satisfactory because the ring increases the outer diameter of the pump body which causes assembly problems in the neck of the tank and sealing problems.

En outre, la tenue mécanique de cette bague n'est pas fiable dans le temps ce qui engendre des risques de pollution accidentelle. En effet, la zone de contact entre le corps de pompe et le filtre doit être parfaitement étanche à l'air afin de contraindre celui-ci à traverser la bague.In addition, the mechanical strength of this ring is not reliable over time which creates risks of accidental pollution. Indeed, the contact zone between the pump body and the filter must be perfectly airtight in order to force it to pass through the ring.

Au surplus, un serrage excessif de la bague sur le corps de pompe peut engendrer des dysfonctionnements de cette dernière.In addition, excessive tightening of the ring on the pump body can cause malfunctions of the latter.

La présente invention a pour but de résoudre les problèmes de l'art antérieur.
Ce but est atteint, selon l'invention au moyen d'un dispositif selon la revendication 1.
Selon une autre caractéristique, la porosité de ladite membrane est comprise entre 0,05 et 0,5 microns.
Selon une première variante de réalisation, ledit élément de support est constitué d'une zone périphérique de ladite membrane située radialement au-delà dudit orifice et qui est soudée ou collée directement sur les bords dudit orifice.
Selon une autre variante, le bord libre de ladite membrane est engagé dans un cadre surmoulé.
De préférence, ledit cadre est solidaire dudit élément de support.
Toujours selon cette dernière variante, ledit élément de support est sous forme d'un manchon dont le diamètre extérieur est sensiblement égal au diamètre intérieur dudit orifice dans lequel il est destiné à être introduit à la manière d'un bouchon.
Avantageusement, ledit manchon présente une extrémité tronconique pour faciliter son introduction dans l'orifice.
En outre, ledit cadre présente un épaulement venant en contact d'appui avec la paroi du corps de pompe pour positionner la membrane relativement audit orifice.
Selon encore une autre caractéristique, ladite membrane est disposée à l'intérieur dudit orifice.
Le dispositif de l'invention assure une filtration efficace de l'air rentrant tout en occupant un encombrement minimum sur le corps de pompe en étant localisé à proximité immédiate de l'orifice d'évent.
La tenue du dispositif sur le corps de pompe est améliorée par rapport aux dispositifs antérieurs et l'étanchéité est renforcée.
Par ailleurs, l'invention procure un gain notable de matière filtrante du fait de la faible surface utilisée.
Au surplus, ce dispositif s'applique à différents calibres de pompes et à des plages relativement larges de viscosité de produits (de liquide à pâteux) sans qu'il soit nécessaire de modifier ou d'adapter les dimensions de la membrane.The present invention aims to solve the problems of the prior art.
This object is achieved according to the invention by means of a device according to claim 1.
According to another characteristic, the porosity of said membrane is between 0.05 and 0.5 microns.
According to a first variant embodiment, said support element consists of a peripheral zone of said membrane located radially beyond said orifice and which is welded or glued directly to the edges of said orifice.
According to another variant, the free edge of said membrane is engaged in an overmoulded frame.
Preferably, said frame is integral with said support member.
Still according to this last variant, said support member is in the form of a sleeve whose outer diameter is substantially equal to the inner diameter of said orifice in which it is intended to be introduced in the manner of a plug.
Advantageously, said sleeve has a frustoconical end to facilitate its introduction into the orifice.
In addition, said frame has a shoulder coming into bearing contact with the wall of the pump body to position the membrane relative to said orifice.
According to yet another characteristic, said membrane is disposed inside said orifice.
The device of the invention ensures efficient filtration of the incoming air while occupying a minimum space on the pump body being located in the immediate vicinity of the vent orifice.
The holding of the device on the pump body is improved over previous devices and the seal is enhanced.
Furthermore, the invention provides a significant gain of filter material because of the small area used.
In addition, this device applies to different pump sizes and relatively wide ranges of product viscosity (liquid to pasty) without the need to change or adapt the dimensions of the membrane.

D'autres objets et avantages de l'invention apparaîtront au cours de la description qui suit, faite en référence aux dessins annexés, sur lesquels :

  • La figure 1 représente une vue générale en coupe axiale d'une pompe sur un réservoir montrant les passages pour la reprise d'air ;
  • Les figures 2A et 2B représentent des vues partielles respectivement en coupe et de profil d'un mode de réalisation du dispositif de l'invention monté sur un corps de pompe ;
  • La figure 3 représente une vue en coupe transversale du mode de réalisation des figures 2A, 2B ;
  • La figure 4 représente une vue de dessus en coupe transversale d'un autre mode de réalisation du dispositif de l'invention appliqué à un corps de pompe.
Other objects and advantages of the invention will become apparent from the following description, made with reference to the accompanying drawings, in which:
  • The figure 1 represents a general view in axial section of a pump on a tank showing the passages for the return of air;
  • The Figures 2A and 2B represent partial views respectively in section and in profile of an embodiment of the device of the invention mounted on a pump body;
  • The figure 3 represents a cross-sectional view of the embodiment of the Figures 2A, 2B ;
  • The figure 4 represents a top view in cross section of another embodiment of the device of the invention applied to a pump body.

Le distributeur représenté sur la figure 1 comprend une pompe P montée sur un col C de réservoir où elle est fixée par sertissage d'une bague B.
Le corps K de la pompe P est constitué d'une enveloppe cylindro-conique qui renferme un mécanisme à piston surmonté d'un tube-gicleur T. Le corps K est pourvu d'un orifice d'évent E ménagé au travers de sa paroi latérale et disposé ici au-dessus du niveau du bord supérieur du col C.The distributor represented on the figure 1 comprises a pump P mounted on a tank neck C where it is fixed by crimping a ring B.
The body K of the pump P consists of a cylindrical-conical envelope which encloses a piston mechanism surmounted by a tube-nozzle T. The body K is provided with a vent orifice E formed through its wall side and disposed here above the level of the upper edge of the neck C.

Une fois la phase de restitution effectuée, la dépression créée dans le réservoir entraîne l'aspiration d'un volume d'air de compensation qui est prélevé à l'extérieur par le passage délimité à l'intérieur du corps K, en partie haute, entre le tube T et la paroi interne du corps puis au travers de l'orifice d'évent E et enfin en partie basse, entre la paroi extérieure du corps et la paroi interne du col C, comme représenté avec le parcours fléché sur la figure 1.Once the restitution phase has been carried out, the depression created in the reservoir causes the suction of a volume of compensation air which is taken outside by the passage defined inside the body K, in the upper part, between the tube T and the inner wall of the body and then through the vent orifice E and finally in the lower part, between the outer wall of the body and the inner wall of the neck C, as shown with the arrow path on the figure 1 .

Le dispositif de l'invention vise à filtrer l'air rentrant dans le réservoir lors du retour vers l'équilibre des pressions entre l'intérieur et l'extérieur du réservoir.
A cet effet, le dispositif comprend une membrane filtrante 1 au travers de laquelle est susceptible de déboucher l'orifice E et dont le bord libre est raccordé à un élément de support fixé de manière étanche sur ledit orifice.The device of the invention aims to filter the air entering the tank during the return to equilibrium pressures between the inside and outside of the tank.
For this purpose, the device comprises a filter membrane 1 through which is likely to open the orifice E and whose free edge is connected to a support member sealingly attached to said orifice.

Du fait que l'air passe de l'intérieur du corps vers le volume intérieur du réservoir, la membrane 1 est disposée soit à l'extérieur du corps K (figure 4), soit au moins en partie à l'intérieur de l'orifice E (figure 2A).Since the air passes from the interior of the body towards the interior volume of the tank, the membrane 1 is disposed outside the body K ( figure 4 ), at least partly inside the orifice E ( Figure 2A ).

La porosité de la membrane 1 est adaptée à la filtration de l'air et est comprise entre 0,05 et 0,5 microns.The porosity of the membrane 1 is adapted to the filtration of air and is between 0.05 and 0.5 microns.

Pour faciliter la fixation du dispositif, le corps K de la pompe présente un méplat M s'étendant immédiatement autour de l'orifice d'évent E.To facilitate attachment of the device, the body K of the pump has a flat M extending immediately around the vent port E.

Dans le mode de réalisation des figures 2A, 2B et 3, le bord libre 10 de ladite membrane 1 est engagé dans un cadre 2 où il est emprisonné par surmoulage en délimitant un conduit central 20 au travers duquel est disposée la surface filtrante de la membrane.
Le cadre 2 est solidaire d'un élément de support.
L'élément de support est ici sous forme d'un manchon 21 dont le diamètre extérieur est sensiblement égal au diamètre intérieur de l'orifice E dans lequel il est destiné à être introduit par emmanchement à la manière d'un bouchon comme représenté sur les figures 2A et 2B. La fixation est alors assurée par un simple serrage radial et renforcée, le cas échéant, par collage ou soudage.In the embodiment of Figures 2A, 2B and 3 , the free edge 10 of said membrane 1 is engaged in a frame 2 where it is trapped by overmolding delimiting a central conduit 20 through which is disposed the filtering surface of the membrane.
The frame 2 is secured to a support member.
The support element is here in the form of a sleeve 21 whose outer diameter is substantially equal to the inside diameter of the orifice E in which it is intended to be introduced by fitting in the manner of a plug as shown in FIGS. Figures 2A and 2B . The fixing is then ensured by a simple radial clamping and reinforced, if necessary, by gluing or welding.

Cette fixation permet la retenue du dispositif dans l'orifice E du corps K même lors de la phase d'aspiration lors de la reprise d'air.This attachment allows the retention of the device in the orifice E of the body K even during the suction phase when the air intake.

Comme représenté sur la figure 3, le manchon 21 présente une extrémité tronconique 22 pour faciliter son introduction dans l'orifice E.
Le cadre 2 présente un épaulement débordant 23 venant en contact d'appui avec la paroi du corps K de la pompe pour limiter l'enfoncement du dispositif et positionner correctement la membrane 1 relativement à l'orifice E.As shown on the figure 3 , the sleeve 21 has a frustoconical end 22 to facilitate its introduction into the orifice E.
The frame 2 has an overhanging shoulder 23 coming into bearing contact with the wall of the body K of the pump to limit the penetration of the device and correctly position the membrane 1 relative to the orifice E.

Dans la variante de la figure 2A, la longueur du manchon 21 est supérieure ou égale à l'épaisseur de la paroi du corps K et la membrane 1 est disposée à l'intérieur de l'orifice E, dans l'épaisseur de la paroi du corps K.
Il est toutefois possible, selon une variante, de prévoir que la membrane 1 recouvre l'orifice E à l'extérieur du corps de pompe.In the variant of the Figure 2A , the length of the sleeve 21 is greater than or equal to the thickness of the wall of the body K and the membrane 1 is disposed inside the orifice E, in the thickness of the wall of the body K.
However, it is possible, according to a variant, to provide that the membrane 1 covers the orifice E outside the pump body.

Dans le mode de réalisation de la figure 4, l'élément de support est constitué d'une zone périphérique 11 de la membrane 1 située radialement au-delà de l'orifice E et qui est soudée ou collée directement sur le méplat M jusqu'aux bords dudit orifice. Dans ce cas, la partie centrale de la membrane 1 recouvre l'orifice E.In the embodiment of the figure 4 , the support element consists of a peripheral zone 11 of the membrane 1 located radially beyond the orifice E and which is welded or glued directly on the flat M to the edges of said orifice. In this case, the central portion of the membrane 1 covers the orifice E.

Claims (6)

  1. An air filtration device for the vent orifice (E) formed through a lateral wall of a body (K) of a pump intended to be fitted on a liquid or a semi-fluid product dispenser, characterized in that it comprises a filter membrane (1) through which said vent may open and the free edge of which is connected to a support element tightly fixed on said orifice, the membrane and the support element being disposed outside the body of the pump (K).
  2. A filtration device according to claim 1, characterized in that the body (K) of the pump has a flat section (M) extending immediately around the vent orifice (E).
  3. A filtration device according to claim 1 or 2, characterized in that the porosity of said membrane (1) is comprised between 0,05 and 0,5 micrometers.
  4. A device according to one of the preceding claims, characterized in that said supporting element is composed of a peripheral area (11) of said membrane (1) located radially beyond said orifice (E) and which is directly welded or stuck onto the edges of said orifice.
  5. A device according to one of claims 1 to 3, characterized in that the free edge of said membrane (1) is engaged into an over-molded frame (2).
  6. A device according to claim 5, characterized in that said frame (2) is linked to said supporting element.
EP06778580A 2005-06-10 2006-06-06 Air filtration device for liquid or semi-liquid product pump Revoked EP1888253B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0505940A FR2886926B1 (en) 2005-06-10 2005-06-10 AIR FILTRATION DEVICE FOR LIQUID OR SEMI-LIQUID PRODUCT PUMP
PCT/FR2006/001275 WO2006131637A1 (en) 2005-06-10 2006-06-06 Air filtration device for liquid or semi-liquid product pump

Publications (2)

Publication Number Publication Date
EP1888253A1 EP1888253A1 (en) 2008-02-20
EP1888253B1 true EP1888253B1 (en) 2011-11-09

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EP06778580A Revoked EP1888253B1 (en) 2005-06-10 2006-06-06 Air filtration device for liquid or semi-liquid product pump

Country Status (5)

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US (1) US8083823B2 (en)
EP (1) EP1888253B1 (en)
AT (1) ATE532586T1 (en)
FR (1) FR2886926B1 (en)
WO (1) WO2006131637A1 (en)

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US7775406B2 (en) * 2005-05-12 2010-08-17 Meadwestvaco Calmar, Inc. Trigger sprayer with venting membrane in protective housing cavity
ATE401968T1 (en) * 2005-08-08 2008-08-15 Guala Dispensing Spa VENTILATION INSERT FOR A FLUID DISPENSER AND METHOD FOR APPLYING A MEMBRANE THERETO
GB0520608D0 (en) * 2005-10-11 2005-11-16 Incro Ltd Pump dispenser

Also Published As

Publication number Publication date
FR2886926A1 (en) 2006-12-15
WO2006131637A1 (en) 2006-12-14
FR2886926B1 (en) 2007-08-31
US8083823B2 (en) 2011-12-27
EP1888253A1 (en) 2008-02-20
ATE532586T1 (en) 2011-11-15
US20080141635A1 (en) 2008-06-19

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