EP1079936B1 - Aerosol dispenser for liquid products - Google Patents

Aerosol dispenser for liquid products Download PDF

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Publication number
EP1079936B1
EP1079936B1 EP99920910A EP99920910A EP1079936B1 EP 1079936 B1 EP1079936 B1 EP 1079936B1 EP 99920910 A EP99920910 A EP 99920910A EP 99920910 A EP99920910 A EP 99920910A EP 1079936 B1 EP1079936 B1 EP 1079936B1
Authority
EP
European Patent Office
Prior art keywords
chamber
atomiser according
push button
pump
jet tube
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.)
Expired - Lifetime
Application number
EP99920910A
Other languages
German (de)
French (fr)
Other versions
EP1079936A1 (en
Inventor
Jean-Louis Bougamont
Hervé Lompech
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.)
Albea Le Treport SAS
Original Assignee
Rexam Sofab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rexam Sofab filed Critical Rexam Sofab
Publication of EP1079936A1 publication Critical patent/EP1079936A1/en
Application granted granted Critical
Publication of EP1079936B1 publication Critical patent/EP1079936B1/en
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1087—Combination of liquid and air pumps
    • 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
    • B05B11/1015—Piston pumps actuated without substantial movement of the nozzle in the direction of the pressure stroke
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1097—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 with means for sucking back the liquid or other fluent material in the nozzle after a dispensing stroke

Definitions

  • the present invention relates to a diffuser for liquid products in the form of aerosols.
  • Diffusers of the type already exist comprising a pump mounted in a sealed manner in the neck of a container by means of a fixing sleeve and provided, on the one hand, with an internal metering chamber and, on the other hand , a spray tube which projects outside where it is engaged in a push button.
  • This nozzle tube is capable of being supplied by the metering chamber and of communicating with a transverse ejection duct equipped with a spray nozzle.
  • the ejection duct and / or the nozzle may be blocked by the dry residue which prohibits thus any subsequent dissemination operation.
  • the present invention aims to solve these technical problems satisfactorily.
  • a diffuser of the preceding type comprising a pump engaged in a sealed manner in the neck of a container and provided, on the one hand, with an internal metering chamber and, on the other hand, a nozzle tube which projects outside where it is engaged in a push button, said nozzle tube being capable of being supplied by the metering chamber and of communicating with a transverse conduit of ejection equipped with a spray nozzle, characterized in that it comprises, upstream of the ejection duct, an external delivery or suction chamber of a mixture of air and liquid product into which the tube opens nozzle and which contains a piston integral with the push button.
  • said external delivery chamber coaxially surrounds the nozzle tube.
  • the underside of the push-button has a cylindrical bore with grooved walls intended to cover the end part of the spray tube while allowing the passage of the product towards the external delivery chamber.
  • said piston is carried by the lower edge of a cylindrical end piece which is preferably formed from the wall of the lower bore of the push button.
  • said external delivery chamber is delimited laterally by the external wall of the spray tube, on the one hand, and by the internal wall of a central cylindrical sleeve carried by the fixing sleeve of the pump, d 'somewhere else.
  • the bottom of the delivery chamber consists of a part of the upper face of a flange bearing axially on the pump and transversely on the external wall of the nozzle tube.
  • the flange forms a connecting spacer between the side wall of the sleeve and the sleeve and, preferably, the ejection conduit is formed in the thickness of the flange.
  • the inlet orifice of the ejection duct is located in the lower part of the external chamber.
  • said piston is formed of a planar annular face with an inclined peripheral edge formed if necessary, of a flexible lip.
  • the operation of the diffuser of the invention is optimized when the volume of said delivery chamber is equal to that of the metering chamber of the pump.
  • the diffuser comprises a locking sleeve externally furnished with a hoop provided, on the one hand, with an orifice coming opposite the spray nozzle and, on the other hand, with a shoulder coming to bear on the upper edge of the sleeve and forming a high stop for the push button.
  • the push button has a peripheral retaining ring trapped under the shoulder of the hoop.
  • the underside of the sleeve is provided with a groove forming a vent for the pump.
  • this groove is formed on the underside of the flange.
  • the diffuser of the invention couples a metering chamber, internal to the pump, with a delivery and mixing chamber, external to said pump.
  • This coupling makes it possible to compensate for the pressure losses due to the path of the liquid product from the container to the outlet of the nozzle and thus to ensure a more energetic spraying rate.
  • the mixing of the product with the air contained in the external delivery chamber is carried out under pressure and thus leads to better homogenization of the sprayed dose.
  • the raising of the push button under the action of the pump mechanism creates a vacuum in the external chamber which results in a suction of the fraction of the product still in the ejection duct and / or in the nozzle.
  • the fixed position of the nozzle makes it possible to cover the pump with the hoop and, moreover, to obtain greater precision of the jet.
  • the diffuser shown in Figures 1a to 1c comprises a pump 1 whose body 11 containing the mechanism (not shown) is sealingly engaged in the neck C of a container of liquid product P intended to be dispensed in the form of a aerosol (see figelb).
  • the upper part of the body 11 of the pump is fitted inside the neck C with a radial tightening and is possibly locked in this position by cooperation of the latching elements 2b of the skirt 2a of a socket 2 with the rim of the C-neck.
  • Another embodiment consists in fixing the pump body, the diameter of which is less than that of the neck of the container, by sealing the socket on said neck.
  • the body 11 traditionally contains an internal metering chamber and a piston and spring mechanism cooperating with intake and exhaust valves (not shown).
  • the internal metering chamber opens, in the open position of the pump, into a nozzle tube 10, the lower part of which is integral with the piston of the pump and which projects outside the container where it is engaged in a button. pusher 3 possibly removable.
  • the nozzle tube 10 is therefore capable of being supplied by the metering chamber and of communicating, moreover, with a transverse ejection conduit 21 equipped with a spray nozzle 22, by example of the vortex type (such as a MICROMIST nozzle, registered trademark SOFAB).
  • a transverse ejection conduit 21 equipped with a spray nozzle 22 by example of the vortex type (such as a MICROMIST nozzle, registered trademark SOFAB).
  • the diffuser of the invention further comprises, upstream of the ejection duct 21, a chamber 20 for discharging or sucking a mixture of air and liquid product P into which the nozzle tube 10 opens and which contains a piston 32 integral with the push button 3.
  • the delivery chamber 20, the volume of which is variable, is produced inside the bush 2 while being located outside the pump and the container.
  • the chamber 20 here coaxially surrounds the nozzle tube 10 while communicating, moreover, with the ejection conduit 21 and the nozzle 22.
  • the underside of the push button 3 has a cylindrical bore 30 with grooved walls, intended to cover the upper end of the spray tube 10 while allowing the passage of product P towards the delivery chamber 20.
  • a groove 31 which extends diametrically on the bottom 30a and parallel to the generators on the inner side face and on either side.
  • This arrangement ensures radial tightening of the nozzle tube 10 in the bore 30 without hindering the escape of the liquid product P.
  • the piston 32 is carried by the lower edge of a cylindrical end piece 33 which projects downwards from the lower face of the push button 3.
  • the piston 32 is formed of a flat annular face with a peripheral edge inclined downward which ensures the tight and dynamic contact of the internal wall of the end piece 33.
  • the inclined edge is formed of a flexible lip .
  • the nozzle 33 thus forms and delimits the wall of the bore 30 and slides in the chamber 20 by compressing the mixture of air and liquid product P as shown in FIG. 1b.
  • the external delivery chamber 20 is delimited laterally by the external wall of the spray tube 10, on the one hand, and by the inner wall of a central cylindrical sleeve 23 carried by the sleeve 2, on the other hand.
  • the bottom of the discharge chamber 20 consists of a part of the upper face of a flange 24 which bears axially on the body 11 of the pump 1 and transversely on the external wall of the nozzle tube 10.
  • An orifice 25 is produced in the center of the sleeve 23 and through the flange 24 for the passage of the nozzle tube 10.
  • the inner edge of the orifice 25 is provided with a chamfer oriented towards the pump and ensures leaktight contact with the external wall of the tube 10 so as to prevent any leakage of the air / product mixture from the bottom of the chamber 20 during discharge.
  • the flange 24 also forms a connecting spacer between the outer skirt 2a of the sleeve 2 and the central sleeve 23.
  • the flange 24 is here made in one piece with the sleeve 2.
  • the ejection conduit 21 is formed in the thickness of the flange 24 which is then locally reinforced.
  • the underside of the flange 24 is provided with a groove 26 forming a vent for the pump 1 by communicating with the interior of the pump body as soon as it is actuated.
  • the inlet orifice 21a of the ejection duct 21 is preferably located in the lower part of the chamber 20 in order to optimize the delivery and to effect the complete expulsion of the dose of mixture from the chamber internal pump.
  • the height of the nozzle 33 is greater than or equal to that of the sleeve 23.
  • the locking sleeve 2 is externally lined with a hoop 4 made, for example, of anodized aluminum, provided, on the one hand, with an orifice 40 coming opposite the nozzle 22 and, on the other hand, a shoulder 41 bearing on the upper edge of the sleeve 2.
  • a hoop 4 made, for example, of anodized aluminum, provided, on the one hand, with an orifice 40 coming opposite the nozzle 22 and, on the other hand, a shoulder 41 bearing on the upper edge of the sleeve 2.
  • the shoulder 41 forms both a means for vertical positioning of the hoop 4 on the sleeve and a high stop for the push button 3 which has for this purpose a peripheral retaining ring 34 trapped under the shoulder 41 of the hoop .
  • This dose penetrates via the groove 31 into the external chamber 20 where, concomitantly, the air initially present is compressed by the descent of the nozzle 33 in the sleeve 23.
  • the ascent of the end piece 33 in the sleeve 23 generates a vacuum in the external chamber 20.
  • the walls, in particular of the nozzle 22, of the conduit 21 and of the chamber 20, are made with a material containing a non-migrating bactericidal agent.

Landscapes

  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Nozzles (AREA)
  • Closures For Containers (AREA)
  • Catching Or Destruction (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Cosmetics (AREA)
  • Colloid Chemistry (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The invention relates to a dispenser for dispensing liquids in the form of aerosols, the dispenser being of the type comprising a pump (1) engaged in sealed manner in the neck (C) of a container and provided firstly with a metering internal chamber and secondly with a spray tube (10) which projects to the outside, where it is engaged in a plunger knob (3), said spray tube (10) being suitable for being fed by the metering chamber and for communicating with a transverse ejection duct (21) equipped with a spray nozzle (22);the dispenser being, upstream from the ejection duct (21), a delivery or suction external chamber (20) for delivering or for sucking in a mixture of air and of liquid, the spray tube (10) opening out into the external chamber, and the external chamber enclosing a piston (32) secured to the plunger knob (3).

Description

La présente invention concerne un diffuseur de produits liquides sous forme d'aérosols.The present invention relates to a diffuser for liquid products in the form of aerosols.

Il existe déjà des diffuseurs du type comprenant une pompe montée de manière étanche dans le col d'un récipient au moyen d'une douille de fixation et pourvue, d'une part, d'une chambre interne de dosage et, d'autre part, d'un tube gicleur qui fait saillie à l'extérieur où il est engagé dans un bouton-poussoir.Diffusers of the type already exist comprising a pump mounted in a sealed manner in the neck of a container by means of a fixing sleeve and provided, on the one hand, with an internal metering chamber and, on the other hand , a spray tube which projects outside where it is engaged in a push button.

Ce tube gicleur est susceptible d'être alimenté par la chambre de dosage et de communiquer avec un conduit transversal d'éjection équipé d'une buse de pulvérisation.This nozzle tube is capable of being supplied by the metering chamber and of communicating with a transverse ejection duct equipped with a spray nozzle.

Parfois, le conduit d'éjection et la buse de pulvérisation sont réalisés sur le bouton-poussoir qui est mobile axialement avec le tube gicleur. Un tel diffuseur est montré dans le document US-A-5 265 771.Sometimes the ejection duct and the spray nozzle are made on the push button which is axially movable with the spray tube. Such a diffuser is shown in document US-A-5,265,771.

Or, cette disposition interdit tout habillage de la partie supérieure du diffuseur, et en particulier, de la pompe car l'élément d'habillage périphérique formerait alors un écran pour le jet pulvérisé dont la position est variable axialement.However, this provision prohibits any covering of the upper part of the diffuser, and in particular of the pump, since the peripheral covering element would then form a screen for the sprayed jet, the position of which is axially variable.

En outre, dans les diffuseurs traditionnels la perte de charge entre la chambre de dosage et la buse est souvent importante, ce qui entraîne des défauts de pulvérisation tant en intensité qu'en précision ou en finesse.In addition, in traditional diffusers the pressure drop between the metering chamber and the nozzle is often significant, which results in spraying defects both in intensity, in precision or in finesse.

Au surplus, certains produits nécessitent une bonne aération avant d'être diffusés. C'est le cas notamment lorsque l'on souhaite obtenir une mousse de produit finement divisée.In addition, certain products require good ventilation before being distributed. This is particularly the case when it is desired to obtain a finely divided product foam.

Enfin, avec les diffuseurs antérieurs, il est fréquent que le conduit d'éjection et la buse retiennent un reliquat de produit après pulvérisation de la dose souhaitée.Finally, with previous diffusers, it is common for the ejection duct and the nozzle to retain a residue of product after spraying with the desired dose.

Or, si le produit a un pouvoir siccatif important (comme cela est le cas, par exemple, pour les laques capillaires et les produits épais) le conduit d'éjection et/ou la buse risquent d'être obstrués par le reliquat sec qui interdit ainsi toute opération ultérieure de diffusion.However, if the product has a significant drying power (as is the case, for example, for hair spray and thick products) the ejection duct and / or the nozzle may be blocked by the dry residue which prohibits thus any subsequent dissemination operation.

Par ailleurs, la présence d'une goutte résiduelle de produit sur la buse ou dans le conduit d'éjection, c'est-à-dire au contact de l'environnement extérieur, est un facteur inesthétique et/ou contaminant.In addition, the presence of a residual drop of product on the nozzle or in the ejection duct, that is to say in contact with the external environment is an unsightly and / or contaminating factor.

La présente invention a pour but de résoudre ces problèmes techniques de manière satisfaisante.The present invention aims to solve these technical problems satisfactorily.

Ce but est atteint conformément à l'invention au moyen d'un diffuseur du type précédent, comprenant une pompe engagée de manière étanche dans le col d'un récipient et pourvue, d'une part, d'une chambre interne de dosage et, d'autre part, d'un tube gicleur qui fait saillie à l'extérieur où il est engagé dans un bouton-poussoir, ledit tube gicleur étant susceptible d'être alimenté par la chambre de dosage et de communiquer avec un conduit transversal d'éjection équipé d'une buse de pulvérisation, caractérisé en ce qu'il comprend, en amont du conduit d'éjection, une chambre externe de refoulement ou d'aspiration d'un mélange d'air et de produit liquide dans laquelle débouche le tube gicleur et qui renferme un piston solidaire du bouton-poussoir.This object is achieved in accordance with the invention by means of a diffuser of the preceding type, comprising a pump engaged in a sealed manner in the neck of a container and provided, on the one hand, with an internal metering chamber and, on the other hand, a nozzle tube which projects outside where it is engaged in a push button, said nozzle tube being capable of being supplied by the metering chamber and of communicating with a transverse conduit of ejection equipped with a spray nozzle, characterized in that it comprises, upstream of the ejection duct, an external delivery or suction chamber of a mixture of air and liquid product into which the tube opens nozzle and which contains a piston integral with the push button.

Selon une caractéristique avantageuse, ladite chambre externe de refoulement entoure coaxialement le tube gicleur.According to an advantageous characteristic, said external delivery chamber coaxially surrounds the nozzle tube.

Selon une autre caractéristique, la face inférieure du bouton-poussoir comporte un alésage cylindrique à parois rainurées destiné à coiffer la partie d'extrémité du tube gicleur tout en permettant le passage du produit vers la chambre externe de refoulement.According to another characteristic, the underside of the push-button has a cylindrical bore with grooved walls intended to cover the end part of the spray tube while allowing the passage of the product towards the external delivery chamber.

Selon encore une autre caractéristique, ledit piston est porté par le bord inférieur d'un embout cylindrique qui est formé de préférence, de la paroi de l'alésage inférieur du bouton-poussoir.According to yet another characteristic, said piston is carried by the lower edge of a cylindrical end piece which is preferably formed from the wall of the lower bore of the push button.

Selon un mode de réalisation particulier, ladite chambre externe de refoulement est délimitée latéralement par la paroi externe du tube gicleur, d'une part, et par la paroi interne d'un manchon cylindrique central porté par la douille de fixation de la pompe, d'autre part.According to a particular embodiment, said external delivery chamber is delimited laterally by the external wall of the spray tube, on the one hand, and by the internal wall of a central cylindrical sleeve carried by the fixing sleeve of the pump, d 'somewhere else.

Selon une variante, le fond de la chambre de refoulement est constitué d'une partie de la face supérieure d'une bride prenant appui axialement sur la pompe et transversalement sur la paroi externe du tube gicleur.According to a variant, the bottom of the delivery chamber consists of a part of the upper face of a flange bearing axially on the pump and transversely on the external wall of the nozzle tube.

Plus spécifiquement, la bride forme une entretoise de liaison entre la paroi latérale de la douille et le manchon et, de préférence, le conduit d'éjection est ménagé dans l'épaisseur de la bride.More specifically, the flange forms a connecting spacer between the side wall of the sleeve and the sleeve and, preferably, the ejection conduit is formed in the thickness of the flange.

Selon une autre variante, l'orifice d'admission du conduit d'éjection est situé dans la partie basse de la chambre externe.According to another variant, the inlet orifice of the ejection duct is located in the lower part of the external chamber.

Selon encore une autre variante, ledit piston est formé d'une face annulaire plane avec un bord périphérique incliné formé le cas échéant, d'une lèvre souple.According to yet another variant, said piston is formed of a planar annular face with an inclined peripheral edge formed if necessary, of a flexible lip.

Le fonctionnement du diffuseur de l'invention est optimisé lorsque le volume de ladite chambre de refoulement est égal à celui de la chambre de dosage de la pompe.The operation of the diffuser of the invention is optimized when the volume of said delivery chamber is equal to that of the metering chamber of the pump.

Selon un mode de réalisation spécifique, le diffuseur comporte une douille de verrouillage garnie extérieurement d'une frette pourvue, d'une part, d'un orifice venant en regard de la buse de pulvérisation et, d'autre part, d'un épaulement venant en appui sur le bord supérieur de la douille et formant une butée haute pour le bouton-poussoir.According to a specific embodiment, the diffuser comprises a locking sleeve externally furnished with a hoop provided, on the one hand, with an orifice coming opposite the spray nozzle and, on the other hand, with a shoulder coming to bear on the upper edge of the sleeve and forming a high stop for the push button.

A cet effet, le bouton-poussoir possède une couronne périphérique de retenue emprisonnée sous l'épaulement de la frette.For this purpose, the push button has a peripheral retaining ring trapped under the shoulder of the hoop.

Selon encore un autre mode de réalisation, la face inférieure de la douille est pourvue d'une gorge formant évent pour la pompe.According to yet another embodiment, the underside of the sleeve is provided with a groove forming a vent for the pump.

De préférence, cette gorge est ménagée sur la face inférieure de la bride.Preferably, this groove is formed on the underside of the flange.

Le diffuseur de l'invention réalise le couplage d'une chambre de dosage, interne à la pompe, avec une chambre de refoulement et de mélange, externe à ladite pompe.The diffuser of the invention couples a metering chamber, internal to the pump, with a delivery and mixing chamber, external to said pump.

Ce couplage permet de compenser les pertes de charge dues au trajet du produit liquide depuis le récipient jusqu'à la sortie de la buse et d'assurer ainsi un débit de pulvérisation plus énergique.This coupling makes it possible to compensate for the pressure losses due to the path of the liquid product from the container to the outlet of the nozzle and thus to ensure a more energetic spraying rate.

Le mélange du produit avec l'air contenu dans la chambre externe de refoulement est effectué sous pression et conduit ainsi à une meilleure homogénéisation de la dose pulvérisée.The mixing of the product with the air contained in the external delivery chamber is carried out under pressure and thus leads to better homogenization of the sprayed dose.

En outre, après pulvérisation, la remontée du bouton-poussoir sous l'action du mécanisme de la pompe crée une dépression dans la chambre externe qui se traduit par une aspiration de la fraction du produit se trouvant encore dans le conduit d'éjection et/ou dans la buse.In addition, after spraying, the raising of the push button under the action of the pump mechanism creates a vacuum in the external chamber which results in a suction of the fraction of the product still in the ejection duct and / or in the nozzle.

Ainsi, n'est-il plus nécessaire de nettoyer la buse après pulvérisation.This eliminates the need to clean the nozzle after spraying.

Enfin, la position fixe de la buse permet de réaliser un habillage de la pompe par la frette et d'obtenir par ailleurs une plus grande précision du jet.Finally, the fixed position of the nozzle makes it possible to cover the pump with the hoop and, moreover, to obtain greater precision of the jet.

L'invention sera mieux comprise à la lecture de la description qui va suivre accompagnée des dessins sur lesquels :

  • les figures 1a, 1b, 1c représentent des vues en coupe verticale partielle d'un mode de réalisation du diffuseur de l'invention respectivement au repos et pendant les différentes phases de la pulvérisation ;
  • la figure 2 représente une vue de dessous de la douille de fixation utilisée dans le diffuseur de l'invention ;
  • la figure 3 représente une vue de dessous du bouton-poussoir utilisé dans le diffuseur de l'invention.
The invention will be better understood on reading the description which follows, accompanied by the drawings in which:
  • Figures 1a, 1b, 1c show views in partial vertical section of an embodiment of the diffuser of the invention respectively at rest and during the different phases of spraying;
  • Figure 2 shows a bottom view of the fixing sleeve used in the diffuser of the invention;
  • Figure 3 shows a bottom view of the push button used in the diffuser of the invention.

Le diffuseur représenté sur les figures 1a à 1c comprend une pompe 1 dont le corps 11 renfermant le mécanisme (non représenté) est engagé de manière étanche dans le col C d'un récipient de produit liquide P destiné à être distribué sous forme d'un aérosol (voir figurelb).The diffuser shown in Figures 1a to 1c comprises a pump 1 whose body 11 containing the mechanism (not shown) is sealingly engaged in the neck C of a container of liquid product P intended to be dispensed in the form of a aerosol (see figelb).

Plus précisément, la partie supérieure du corps 11 de la pompe est emmanché à l'intérieur du col C avec un serrage radial et est éventuellement verrouillé dans cette position par coopération des éléments d'encliquetage 2b de la jupe 2a d'une douille 2 avec le rebord du col C.More specifically, the upper part of the body 11 of the pump is fitted inside the neck C with a radial tightening and is possibly locked in this position by cooperation of the latching elements 2b of the skirt 2a of a socket 2 with the rim of the C-neck.

Un autre mode de réalisation, non représenté, consiste à fixer le corps de pompe dont le diamètre est inférieur à celui du col du récipient, par verrouillage étanche de la douille sur ledit col.Another embodiment, not shown, consists in fixing the pump body, the diameter of which is less than that of the neck of the container, by sealing the socket on said neck.

Le corps 11 renferme de manière traditionnelle une chambre interne de dosage et un mécanisme à piston et ressort coopérant avec des clapets d'admission et d'échappement (non représentés). La chambre interne de dosage débouche, en position d'ouverture de la pompe, dans un tube gicleur 10 dont la partie inférieure est solidaire du piston de la pompe et qui fait saillie à l'extérieur du récipient où il est engagé dans un bouton-poussoir 3 éventuellement amovible.The body 11 traditionally contains an internal metering chamber and a piston and spring mechanism cooperating with intake and exhaust valves (not shown). The internal metering chamber opens, in the open position of the pump, into a nozzle tube 10, the lower part of which is integral with the piston of the pump and which projects outside the container where it is engaged in a button. pusher 3 possibly removable.

Le tube gicleur 10 est donc susceptible d'être alimenté par la chambre de dosage et de communiquer, par ailleurs, avec un conduit transversal d'éjection 21 équipé d'une buse de pulvérisation 22, par exemple du type tourbillonnaire (tel qu'une buse MICROMIST, marque déposée SOFAB).The nozzle tube 10 is therefore capable of being supplied by the metering chamber and of communicating, moreover, with a transverse ejection conduit 21 equipped with a spray nozzle 22, by example of the vortex type (such as a MICROMIST nozzle, registered trademark SOFAB).

Le diffuseur de l'invention comprend, en outre, en amont du conduit d'éjection 21, une chambre 20 de refoulement ou d'aspiration d'un mélange d'air et de produit liquide P dans laquelle débouche le tube gicleur 10 et qui renferme un piston 32 solidaire du bouton-poussoir 3.The diffuser of the invention further comprises, upstream of the ejection duct 21, a chamber 20 for discharging or sucking a mixture of air and liquid product P into which the nozzle tube 10 opens and which contains a piston 32 integral with the push button 3.

La chambre 20 de refoulement dont le volume est variable, est réalisée à l'intérieur de la douille 2 en étant située à l'extérieur de la pompe et du récipient. La chambre 20 entoure ici coaxialement le tube gicleur 10 en communiquant, par ailleurs, avec le conduit d'éjection 21 et la buse 22.The delivery chamber 20, the volume of which is variable, is produced inside the bush 2 while being located outside the pump and the container. The chamber 20 here coaxially surrounds the nozzle tube 10 while communicating, moreover, with the ejection conduit 21 and the nozzle 22.

La face inférieure du bouton-poussoir 3 comporte un alésage cylindrique 30 à parois rainurées, destiné à coiffer l'extrémité supérieure du tube gicleur 10 tout en permettant le passage du produit P vers la chambre de refoulement 20.The underside of the push button 3 has a cylindrical bore 30 with grooved walls, intended to cover the upper end of the spray tube 10 while allowing the passage of product P towards the delivery chamber 20.

Comme représenté sur la figure 3, dans les parois internes de l'alésage 30 est réalisé une rainure 31 qui s'étend de façon diamétrale sur le fond 30a et parallèlement aux génératrices sur la face latérale interne et de part et d'autre.As shown in Figure 3, in the inner walls of the bore 30 is formed a groove 31 which extends diametrically on the bottom 30a and parallel to the generators on the inner side face and on either side.

Cette disposition permet d'assurer un serrage radial du tube gicleur 10 dans l'alésage 30 sans gêner l'échappement du produit liquide P.This arrangement ensures radial tightening of the nozzle tube 10 in the bore 30 without hindering the escape of the liquid product P.

Dans le mode de réalisation représenté sur les figures, le piston 32 est porté par le bord inférieur d'un embout cylindrique 33 qui fait saillie vers le bas à partir de la face inférieure du bouton-poussoir 3.In the embodiment shown in the figures, the piston 32 is carried by the lower edge of a cylindrical end piece 33 which projects downwards from the lower face of the push button 3.

Le piston 32 est formé d'une face annulaire plane avec un bord périphérique incliné vers le bas qui assure le contact étanche et dynamique de la paroi interne de l'embout 33. Le cas échéant, le bord incliné est formé d'une lèvre souple.The piston 32 is formed of a flat annular face with a peripheral edge inclined downward which ensures the tight and dynamic contact of the internal wall of the end piece 33. Where appropriate, the inclined edge is formed of a flexible lip .

L'embout 33 forme et délimite ainsi la paroi de l'alésage 30 et coulisse dans la chambre 20 en comprimant le mélange d'air et de produit liquide P comme représenté sur la figure 1b.The nozzle 33 thus forms and delimits the wall of the bore 30 and slides in the chamber 20 by compressing the mixture of air and liquid product P as shown in FIG. 1b.

La chambre externe 20 de refoulement est délimitée latéralement par la paroi externe du tube gicleur 10, d'une part, et par la paroi interne d'un manchon cylindrique central 23 porté par la douille 2, d'autre part.The external delivery chamber 20 is delimited laterally by the external wall of the spray tube 10, on the one hand, and by the inner wall of a central cylindrical sleeve 23 carried by the sleeve 2, on the other hand.

Le fond de la chambre 20 de refoulement est constitué d'une partie de la face supérieure d'une bride 24 qui prend appui axialement sur le corps 11 de la pompe 1 et transversalement sur la paroi externe du tube gicleur 10. Un orifice 25 est réalisé au centre du manchon 23 et au travers de la bride 24 pour le passage du tube gicleur 10.The bottom of the discharge chamber 20 consists of a part of the upper face of a flange 24 which bears axially on the body 11 of the pump 1 and transversely on the external wall of the nozzle tube 10. An orifice 25 is produced in the center of the sleeve 23 and through the flange 24 for the passage of the nozzle tube 10.

Le bord intérieur de l'orifice 25 est pourvu d'un chanfrein orienté vers la pompe et assure un contact étanche avec la paroi externe du tube 10 de façon à éviter toute fuite du mélange air/produit par le fond de la chambre 20 lors du refoulement.The inner edge of the orifice 25 is provided with a chamfer oriented towards the pump and ensures leaktight contact with the external wall of the tube 10 so as to prevent any leakage of the air / product mixture from the bottom of the chamber 20 during discharge.

La bride 24 forme aussi une entretoise de liaison entre la jupe extérieure 2a de la douille 2 et le manchon central 23.The flange 24 also forms a connecting spacer between the outer skirt 2a of the sleeve 2 and the central sleeve 23.

La bride 24 est ici réalisée d'une seule pièce avec la douille 2.The flange 24 is here made in one piece with the sleeve 2.

Le conduit d'éjection 21 est ménagé dans l'épaisseur de la bride 24 qui est alors localement renforcée. La face inférieure de la bride 24 est pourvue d'une gorge 26 formant évent pour la pompe 1 en communiquant avec l'intérieur du corps de pompe dès son actionnement.The ejection conduit 21 is formed in the thickness of the flange 24 which is then locally reinforced. The underside of the flange 24 is provided with a groove 26 forming a vent for the pump 1 by communicating with the interior of the pump body as soon as it is actuated.

L'orifice d'admission 21a du conduit d'éjection 21 est situé, de préférence, dans la partie basse de la chambre 20 afin d'optimiser le refoulement et d'effectuer l'expulsion complète de la dose de mélange issue de la chambre interne de la pompe.The inlet orifice 21a of the ejection duct 21 is preferably located in the lower part of the chamber 20 in order to optimize the delivery and to effect the complete expulsion of the dose of mixture from the chamber internal pump.

Dans cette perspective, la hauteur de l'embout 33 est supérieure ou égale à celle du manchon 23.In this perspective, the height of the nozzle 33 is greater than or equal to that of the sleeve 23.

La douille de verrouillage 2 est garnie extérieurement d'une frette 4 réalisée, par exemple, en aluminium anodisé, pourvue, d'une part, d'un orifice 40 venant en regard de la buse 22 et, d'autre part, d'un épaulement 41 venant en appui sur le bord supérieur de la douille 2.The locking sleeve 2 is externally lined with a hoop 4 made, for example, of anodized aluminum, provided, on the one hand, with an orifice 40 coming opposite the nozzle 22 and, on the other hand, a shoulder 41 bearing on the upper edge of the sleeve 2.

L'épaulement 41 forme à la fois un moyen de positionnement vertical de la frette 4 sur la douille et une butée haute pour le bouton-poussoir 3 qui possède à cet effet une couronne périphérique 34 de retenue emprisonnée sous l'épaulement 41 de la frette.The shoulder 41 forms both a means for vertical positioning of the hoop 4 on the sleeve and a high stop for the push button 3 which has for this purpose a peripheral retaining ring 34 trapped under the shoulder 41 of the hoop .

Par appui manuel sur le bouton-poussoir 3, l'utilisateur agit sur le mécanisme de la pompe 1, ce qui a pour effet d'expulser de la chambre interne une dose de produit P dans le tube gicleur 10.By manual pressing of the push-button 3, the user acts on the mechanism of the pump 1, which has the effect of expelling from the internal chamber a dose of product P in the nozzle tube 10.

Cette dose pénètre via la rainure 31 dans la chambre externe 20 où de façon concomitante, l'air présent initialement est comprimé par la descente de l'embout 33 dans le manchon 23.This dose penetrates via the groove 31 into the external chamber 20 where, concomitantly, the air initially present is compressed by the descent of the nozzle 33 in the sleeve 23.

Dans la chambre 20, l'air comprimé et la dose de produit P sous pression se mélangent en générant des turbulences. La poursuite de la descente de l'embout 33 dans le manchon 23 s'accompagne du refoulement du mélange air/produit par le conduit d'éjection 21 et sa pulvérisation à l'extérieur sous forme d'aérosol par la buse 22 au travers de l'orifice 40.In chamber 20, the compressed air and the dose of product P under pressure mix, generating turbulence. The continued descent of the nozzle 33 into the sleeve 23 is accompanied by the discharge of the air / product mixture through the ejection conduit 21 and its spraying outside in the form of an aerosol by the nozzle 22 through orifice 40.

Dès le relâchement du bouton-poussoir 3, le clapet d'échappement de la pompe se ferme.As soon as the push button 3 is released, the pump exhaust valve closes.

La remontée de l'embout 33 dans le manchon 23 génère une dépression dans la chambre externe 20.The ascent of the end piece 33 in the sleeve 23 generates a vacuum in the external chamber 20.

Cette dépression se traduit par une aspiration du reliquat de produit enfermé dans la buse 22 et/ou dans le conduit 21 qui est ainsi récupéré dans la chambre 20.This depression results in a suction of the remainder of product enclosed in the nozzle 22 and / or in the conduit 21 which is thus recovered in the chamber 20.

Pour éviter toute dégradation ou contamination du produit par le résidu de produit restant au contact de l'air dans la chambre, il est possible de prévoir que les parois notamment de la buse 22, du conduit 21 et de la chambre 20 sont réalisées avec une matière contenant un agent bactéricide non migrant.To avoid any degradation or contamination of the product by the product residue remaining in contact with the air in the chamber, it is possible to provide that the walls, in particular of the nozzle 22, of the conduit 21 and of the chamber 20, are made with a material containing a non-migrating bactericidal agent.

Claims (14)

  1. An atomiser for liquid products in the form of aerosols of the type comprising a pump (1) inserted in leak-proof manner in the neck (C) of a container and provided, on the one hand, with an internal dispensing chamber and, on the other, with a jet tube (10) which extends to the outside where it is inserted in a push button (3), said jet tube (10) being capable of being supplied by the dispensing chamber and communicating with a transverse discharge duct (21) fitted with a spray nozzle (22),
       characterised in that it comprises, upstream from the discharge duct (21), an external delivery or intake chamber (20) for a mixture of air and liquid product into which opens the jet tube (10) and which encloses a piston (32) integral with the push button (3).
  2. An atomiser according to claim 1, characterised in that said external delivery chamber (20) surrounds the jet tube (10) coaxially.
  3. An atomiser according to one of the preceding claims, characterised in that the lower face of the push button (3) comprises a cylindrical bore (30) with grooved walls which is intended to be fitted onto the end part of the jet tube (10) while allowing the product to pass towards the external delivery chamber (20).
  4. An atomiser according to one of the preceding claims, characterised in that said piston (32) is borne by the lower edge of a cylindrical extension (33).
  5. An atomiser according to claims 3 and 4, characterised in that said cylindrical extension (33) is formed by the lower bore wall (30) of the push button (3).
  6. An atomiser according to one of the preceding claims, characterised in that said external delivery chamber (20) is delimited to the side by the outer wall of the jet tube (10), on the one hand, and by the internal wall of a cylindrical sleeve (23) borne by the fixing bush (2) of the pump (1), on the other.
  7. An atomiser according to one of the preceding claims, characterised in that the bottom of the delivery chamber (20) is formed by part of the upper face of a flange (24) resting axially on the pump (1) and transversely on the outer wall of the jet tube (10).
  8. An atomiser according to claims 6 and 7, characterised in that the flange (24) forms a connecting web between the side wall of the bush (2) and the central sleeve (23).
  9. An atomiser according to claim 7 or 8, characterised in that the discharge duct (21) is formed in the thickness of the flange (24).
  10. An atomiser according to one of the preceding claims, characterised in that the inlet orifice (21a) of the discharge duct (21) is located in the lower part of the external chamber (20).
  11. An atomiser according to one of the preceding claims, characterised in that said piston (32) is formed from a planar, annular face with an inclined peripheral edge.
  12. An atomiser according to one of the preceding claims, characterised in that it furthermore comprises a locking bush (2) covered externally with a jacket (4) which is provided, on the one hand, with an orifice (40) aligned with the spray nozzle (22) and, on the other, with a shoulder (41) resting on the upper edge of the bush (2) and forming an upper end-stop for the push button (3).
  13. An atomiser according to claim 12, characterised in that the push button (3) has a peripheral retaining ring (34) trapped under the shoulder (41) of the jacket (4).
  14. An atomiser according to one of the preceding claims, characterised in that the inner face of the bush (2) is provided with a groove (26) acting as a vent for the pump (1).
EP99920910A 1998-05-26 1999-05-25 Aerosol dispenser for liquid products Expired - Lifetime EP1079936B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9806577 1998-05-26
FR9806577A FR2779129B1 (en) 1998-05-26 1998-05-26 DIFFUSER OF LIQUID PRODUCTS IN AEROSOL FORM
PCT/FR1999/001214 WO1999061164A1 (en) 1998-05-26 1999-05-25 Aerosol dispenser for liquid products

Publications (2)

Publication Number Publication Date
EP1079936A1 EP1079936A1 (en) 2001-03-07
EP1079936B1 true EP1079936B1 (en) 2004-04-28

Family

ID=9526693

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99920910A Expired - Lifetime EP1079936B1 (en) 1998-05-26 1999-05-25 Aerosol dispenser for liquid products

Country Status (15)

Country Link
US (1) US6290104B1 (en)
EP (1) EP1079936B1 (en)
JP (1) JP2002516176A (en)
CN (1) CN1104963C (en)
AT (1) ATE265273T1 (en)
AU (1) AU3831099A (en)
BR (1) BR9910518A (en)
CA (1) CA2333052A1 (en)
DE (1) DE69916827T2 (en)
DK (1) DK1079936T3 (en)
ES (1) ES2223171T3 (en)
FR (1) FR2779129B1 (en)
HK (1) HK1036949A1 (en)
PT (1) PT1079936E (en)
WO (1) WO1999061164A1 (en)

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Also Published As

Publication number Publication date
DE69916827T2 (en) 2005-03-31
CN1302232A (en) 2001-07-04
PT1079936E (en) 2004-09-30
FR2779129A1 (en) 1999-12-03
CN1104963C (en) 2003-04-09
FR2779129B1 (en) 2000-08-18
CA2333052A1 (en) 1999-12-02
EP1079936A1 (en) 2001-03-07
JP2002516176A (en) 2002-06-04
HK1036949A1 (en) 2002-01-25
ES2223171T3 (en) 2005-02-16
AU3831099A (en) 1999-12-13
ATE265273T1 (en) 2004-05-15
US6290104B1 (en) 2001-09-18
WO1999061164A1 (en) 1999-12-02
DK1079936T3 (en) 2004-08-30
DE69916827D1 (en) 2004-06-03
BR9910518A (en) 2001-09-04

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