EP0450990A1 - Self-closing valve especially for an aerosol container - Google Patents

Self-closing valve especially for an aerosol container Download PDF

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Publication number
EP0450990A1
EP0450990A1 EP91400288A EP91400288A EP0450990A1 EP 0450990 A1 EP0450990 A1 EP 0450990A1 EP 91400288 A EP91400288 A EP 91400288A EP 91400288 A EP91400288 A EP 91400288A EP 0450990 A1 EP0450990 A1 EP 0450990A1
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EP
European Patent Office
Prior art keywords
chamber
rod
seal
valve
groove
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
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EP91400288A
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German (de)
French (fr)
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EP0450990B1 (en
Inventor
Gilles Baudin
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LOreal SA
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LOreal SA
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Priority claimed from FR9004246A external-priority patent/FR2660398B1/en
Application filed by LOreal SA filed Critical LOreal SA
Publication of EP0450990A1 publication Critical patent/EP0450990A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/44—Valves specially adapted therefor; Regulating devices

Definitions

  • the present invention relates to a self-locking valve, in particular for an aerosol container containing a product to be sprayed.
  • the containers or aerosol cans contain, in a known manner, a product to be dispensed and a propellant.
  • the distribution is done by opening a valve, comprising a rod contained in a valve body.
  • This valve body is, on the one hand, in communication with the atmosphere through an internal conduit of the rod, and, on the other hand, with the container in general by means of a dip tube, a device of the valve stem being connected to the stem and to the valve body.
  • the valve stem is pressed by pressing, for example, a push button, so as to put the container and the atmosphere in communication and to spray the product contained in the container; when the pressure on the push button is released, the return device returns the valve stem to its rest or storage position and spraying stops.
  • the present invention relates to a valve which makes it possible to solve this problem; it includes a seal, dividing the valve body into two chambers, a seal which slides in the valve body when the valve stem is pushed in and can slide on the stem when the pressure in the chamber in communication with the container exerts on the seal an opposing force greater than the force exerted by a spring contained in the chamber in communication with the atmosphere.
  • the present invention therefore relates to a self-locking valve, in particular for aerosol containers containing a product to be sprayed, comprising a rod, at least partially tubular to allow the outlet of the sprayed product, slidingly mounted in a valve body, and that is pushed into the valve body to activate the spraying, the valve body being able, on the one hand, to be placed in communication with the atmosphere and, on the other hand, in communication with the container, preferably using a dip tube, a valve stem return device being connected to the stem and to the valve body, characterized in that the valve body is divided by a seal in two chambers, a first chamber which can be placed in communication with the atmosphere when the stem is pressed and a second chamber which is in communication with the container, that the seal is capable of sliding, on the one hand, on the internal wall of the valve body and, on the other hand, on the valve stem between a stop disposed on said stem valve and a position where communication is established between the first and second chambers, a spring being disposed in the first chamber
  • the joint separating the two chambers is advantageously constituted by a washer threaded around the rod, the stop being constituted by a collar of the rod situated on the side of the joint facing the second chamber.
  • the seal is preferably an elastic seal.
  • the rod is pierced with a bore perpendicular to its axis which opens in the tubular part of the rod and which, when the rod is pressed opens inside the first chamber so as to connect said first chamber and the atmosphere while at rest this bore is isolated from the first chamber.
  • the rod preferably comprises, at the level of the first chamber, at least one groove which makes it possible to put the first and second chambers into communication, by relative sliding of the rod and of the seal, this groove being closed when the seal is in abutment against the stop.
  • annular cup forming a seal support.
  • This cup has the advantage of allowing a better distribution of the force exerted by the spring on the seal, and avoids any risk of deterioration of the seal by the spring.
  • the rod return device contained in the second chamber is preferably constituted by a spring.
  • the second chamber is provided with an additional gas intake.
  • This additional gas intake is, for example, constituted by an opening pierced in the bottom of the valve body, which allows entry into the valve body of the gaseous phase which collects in the upper part of the container. It has been found that this additional gas intake makes it possible to obtain good spraying.
  • Such a self-locking valve is particularly intended for an aerosol container using a compressed gas (air, nitrogen for example) as propellant, a gas whose pressure gradually decreases after use.
  • a compressed gas air, nitrogen for example
  • the invention also aims to provide a self-locking valve, the rod of which has a groove as indicated above, which ensures a flow rate of sprayed product as regular as possible without the drying of the product becoming too troublesome.
  • the present invention therefore, also has for its object, a self-locking valve, as defined above and in which a communication is established between the first and the second chambers, by virtue of a groove made in the valve stem, characterized by the fact that the groove formed on the valve stem has, in section perpendicular to the axis of the stem, an increasing section along a direction parallel to the axis of the valve stem, the largest section being located from the side of the second chamber, so that the passage section, offered to the product to be dispensed, increases when the pressure decreases in the container.
  • the means ensuring the regulation of the flow of product to be sprayed are thus located on the valve, inside the aerosol can, so that the risks of drying of the product are reduced.
  • the bottom of the groove gradually deviates from the outer surface of the rod, so that the depth of the groove increases, in the direction from the first chamber towards the second bedroom.
  • the bottom may be constituted by a flat surface, the section of which by a mean plane passing through the axis of the rod is a straight segment.
  • the section of the groove advantageously has the shape of a right triangle, one side of which is situated on the external surface of the rod, the other side of which is situated towards the second chamber, and the hypotenuse is located in the stem.
  • the peripheral width of the groove can gradually increase in the direction from the first chamber to the second chamber.
  • the progressive increase in width can be combined with the progressive increase in depth.
  • Figure 1 of these drawings is a longitudinal section of a self-locking valve according to the invention in the rest or closed position.
  • Figure 2 shows, similarly to Figure 1, the valve in the open position with the rod pressed, the pressure in the container being sufficient.
  • Figure 3 shows the valve with stem pushed in, while the pressure in the container is insufficient.
  • Figure 4 is a longitudinal sectional view of an alternative embodiment of the self-locking valve in the rest or closed position.
  • Figure 5 shows in elevation the valve stem of Figure 4.
  • Figure 6 is a section along the line VI-VI of figure 5.
  • Figure 7 shows, similarly to Figure 4, the valve in the open position with the rod pressed, the pressure in the container being sufficient.
  • FIG 8 finally, partially shows the valve of Figure 4 with pressed rod, while the pressure in the container is insufficient.
  • FIG. 1 represents the self-locking valve according to the invention, generally designated by 1, in the rest position.
  • the valve 1 is constituted by a rod 2 and by a valve body 3.
  • the valve 1 is inserted into the closure cup 4 of an aerosol container (not shown).
  • the seal between the closure cup 4, the rod 2 and the valve body 3 is ensured by means of an elastic seal 5 in which the rod 2 can slide in leaktight manner.
  • the valve body 3 is divided, by an elastic seal 6, into two chambers, a first chamber A which can be placed in communication with the atmosphere and a second chamber B which is in permanent communication with the aerosol container containing the product to spray and the propellant, via a dip tube 7.
  • the seal 6 consists of a washer, in particular of elastomeric material, threaded around the rod 2, with its mean plane orthogonal to the axis of the rod.
  • chamber B contains a rod return device constituted by a spring 9 arranged between one face of an annular stop 21 of the rod 2 and the bottom of chamber B.
  • the seal 6, in the valve rest position, is arranged on the other face of the stop 21.
  • the rod 2 is tubular in its part 22 facing outwards, this tubular part 22 extending up to a level of the rod 2, such that, in the rest position, it is contained in the chamber A.
  • the rod 2 is pierced with a bore 23 perpendicular to the axis of the rod 2 which opens in the tubular part 22 of the rod and which is located at a level such that in the rest position of the rod 2 it is firm by the seal 5.
  • the rod 2 is provided with a longitudinal rectilinear groove 25, which extends from the vicinity of the stop 21 to a shoulder 24 of the rod 2.
  • the chamber A contains an annular cup 10 which rests on one face of the seal 6.
  • Chamber A further contains a spring 11 which is disposed between an annular shoulder 24 of the rod and the annular cup 10.
  • the spring 11 is chosen so that it exerts on the seal 6 a determined force which is equal to the force antagonist exerted on the joint by the minimum gas pressure for which there is suitable spraying.
  • valve rod 2 is pressed so as to push it in.
  • the external wall of the valve stem 2 slides in the seal 5 and releases the bore 23 which connects the chamber A and the tubular part 22 of the valve stem 2 (see FIG. 2).
  • Chamber A is brought to atmospheric pressure.
  • the pressure inside the container and of chamber B if it is greater than the minimum admissible pressure, exerts a force greater than the force of the spring 11 and in the opposite direction.
  • the seal 6 is pushed back on the rod side of the chamber A by compressing the spring 11 and releasing the groove 25 hollowed in the rod 2.
  • the passage of the product from the chamber B towards the chamber A becomes possible.
  • the product follows the path marked by the arrows f1 in Figure 2 to be sprayed.
  • Figure 3 illustrates what happens when the pressure inside the container is below the minimum allowable pressure.
  • the valve stem 2 is provided with a groove 125 situated at the level of the first chamber A, when the valve is in the rest position as shown in FIG. 1.
  • the stem 2 is pressed and the pressure exerted by the product in the container is greater than the minimum pressure Po, the rod 2 slides relative to the seal 6, as visible in FIG. 7, and a certain length of the groove 125 opens in the second chamber B, which puts in communication the first and second chambers A, B.
  • the groove 125 formed on the rod 2 has, in section perpendicular to the axis of said valve body, a section S (see FIG. 6) increasing along a direction parallel to the axis C of the rod, the section S the largest being located on the side of chamber B, as visible in FIG. 4.
  • the gradual increase in section S can be obtained by a gradual increase in the radial depth h of the groove.
  • the bottom 125 a of the groove 125 then gradually moves away from the external surface 2 a of the rod, as visible in FIGS. 4 and 7.
  • the bottom 125 a can be constituted by a flat surface whose section, by a mean plane passing through the axis C, is a rectilinear segment.
  • the section of the groove 125, by such a plane, has the shape of a triangle rectangle with one side 125 b located on the outer surface 2 a of the stem, the other side 125 c , orthogonal to the axis C, is located towards the second chamber and whose hypotenuse is located in the stem 2 and belongs to the bottom 125 a .
  • the end of the groove 125, facing the second chamber B, is situated, when the valve is at rest, in the thickness of the seal 6, as visible in FIG. 4; the 125 c rib is located substantially at mid-thickness.
  • the peripheral width 1 preferably, gradually increases in the direction from the first chamber to the second chamber, as can be seen in FIG. 5.
  • Chamber A contains an annular cup 10 which rests on one face of the seal 6. It also contains a spring 11 which is arranged between an annular shoulder 24 of the valve stem 2 and the annular cup 10. The spring 11 is chosen to so that it exerts on the joint 6 a determined force which is equal to the opposing force exerted on the joint by the minimum pressure of the gas for which there is suitable spraying.
  • the operation of the self-locking valve 1 is as follows.
  • valve rod 2 is pressed so as to push the latter.
  • the seal 5 slides on the external wall of the valve stem 2 and releases the bore 23 which connects the chamber A and the tubular part 22 of the valve stem 2.
  • Chamber A is brought to atmospheric pressure.
  • the pressure inside the container and of chamber B if it is greater than the minimum admissible pressure, exerts a force greater than the force of the spring 11 and in the opposite direction.
  • the seal 6 is pushed back onto the valve stem 2 from the side of the chamber A by compressing the spring 11 and releasing the groove 125 hollowed out in the valve stem 2, as illustrated in FIG. 7.
  • the increase in the passage section makes it possible to compensate, at least partially, for the drop in pressure and to keep the flow rate of the sprayed product substantially constant.
  • valve stem 2 When you stop pressing the valve stem 2, the latter slides under the action of the return spring 9 and returns to the rest position.
  • the bore 23 returns to the level of the seal 5 and the communication between the chamber A and the atmosphere is cut off.
  • the pressure is balanced between the chambers A and B and the seal 6 goes down again on the valve stem 2 until it comes into contact with the stop 21.
  • the communication between the chambers A and B via the groove 125 n is therefore no longer possible.
  • the valve 1 is again in the rest position as shown in FIG. 4.

Abstract

Self-closing valve, especially for an aerosol container, comprising a rod (2) mounted slidably in a valve body (3) divided into two chambers (A) and (B) by a seal (6) which can slide on the rod (2) between a stop (21) and a position permitting communication between the chambers (A) and (B), under the influence of the pressure in the container, when the said pressure exerts, on the seal (6), an antagonistic force greater than that exerted by a spring (11) on this seal (6). <IMAGE>

Description

La présente invention concerne une valve autobloquante, notamment pour récipient aérosol contenant un produit à pulvériser.The present invention relates to a self-locking valve, in particular for an aerosol container containing a product to be sprayed.

Les récipients ou bombes aérosols, contiennent de façon connue un produit à distribuer et un propulseur. La distribution se fait par ouverture d'une valve, comportant une tige contenue dans un corps de valve. Ce corps de valve est, d'une part, en communication avec l'atmosphère à travers un conduit interne de la tige, et, d'autre part, avec le récipient en général par l'intermédiaire d'un tube plongeant, un dispositif de rappel de la tige de valve étant relie à la tige et au corps de valve. Pour effectuer la pulvérisation, on enfonce la tige de valve en appuyant, par exemple, sur un bouton-poussoir, de façon à mettre en communication le récipient et l'atmosphère et à pulvériser le produit contenu dans le récipient ; lorsqu'on relâche la pression sur le bouton-poussoir, le dispositif de rappel ramène la tige de valve dans sa position de repos ou stockage et la pulvérisation cesse. Lorsque l'on pulvérise un produit, notamment de la laque pour cheveux, il est nécessaire d'obtenir, pendant toute la durée d'utilisation du récipient, une bonne qualité de pulvérisation, c'est-à-dire un débit correct et une taille convenable des gouttelettes pulvérisées. Ce problème se pose plus particulièrement, lorsque le propulseur est un gaz comprimé (N₂, CO₂ ou air).The containers or aerosol cans contain, in a known manner, a product to be dispensed and a propellant. The distribution is done by opening a valve, comprising a rod contained in a valve body. This valve body is, on the one hand, in communication with the atmosphere through an internal conduit of the rod, and, on the other hand, with the container in general by means of a dip tube, a device of the valve stem being connected to the stem and to the valve body. To carry out the spraying, the valve stem is pressed by pressing, for example, a push button, so as to put the container and the atmosphere in communication and to spray the product contained in the container; when the pressure on the push button is released, the return device returns the valve stem to its rest or storage position and spraying stops. When spraying a product, in particular hairspray, it is necessary to obtain, throughout the period of use of the container, good spray quality, that is to say a correct flow rate and a suitable size of spray droplets. This problem arises more particularly, when the propellant is a compressed gas (N₂, CO₂ or air).

En effet, il apparaît que, lors de la pulvérisation, la consommation de gaz est importante et la chute de pression gazeuse est rapide. Si la pression descend au-dessous d'une valeur déterminée il n'est plus possible d'obtenir une pulvérisation correcte. Pour rétablir une pulvérisation correcte il faut :

  • soit inclure dans le récipient une réserve de gaz compensant régulièrement la chute de pression ;
  • soit recharger le bidon en gaz comprimé, par exemple à l'aide d'un compresseur tel que décrit dans les demandes de brevet 89 16718 et 89 16719 du 18 Décembre 1989.
Indeed, it appears that, during spraying, the gas consumption is high and the gas pressure drop is rapid. If the pressure drops below a certain value it is no longer possible to obtain a correct spray. To restore correct spraying, you must:
  • either include in the container a reserve of gas regularly compensating for the pressure drop;
  • either recharge the can with compressed gas, for example using a compressor as described in patent applications 89 16718 and 89 16719 of December 18, 1989.

Dans le second cas, il est nécessaire d'utiliser une valve qui empêche automatiquement toute pulvérisation lorsque la pression à l'intérieur du récipient est inférieure à la pression minimale permettant une pulvérisation convenable. Le consommateur est ainsi averti que, pour pouvoir effectuer une nouvelle pulvérisation, il doit recharger le récipient en gaz comprimé.In the second case, it is necessary to use a valve which automatically prevents any spraying when the pressure inside the container is lower than the minimum pressure allowing a suitable spraying. The consumer is thus warned that, to be able to carry out a new spraying, he must reload the container with compressed gas.

La présente invention concerne une valve qui permet de résoudre ce problème ; elle comporte un joint, divisant le corps de valve en deux chambres, joint qui coulisse dans le corps de valve quand on enfonce la tige de valve et peut coulisser sur la tige lorsque la pression dans la chambre en communication avec le récipient exerce sur le joint une force antagoniste supérieure à la force exercée par un ressort contenu dans la chambre en communication avec l'atmosphère.The present invention relates to a valve which makes it possible to solve this problem; it includes a seal, dividing the valve body into two chambers, a seal which slides in the valve body when the valve stem is pushed in and can slide on the stem when the pressure in the chamber in communication with the container exerts on the seal an opposing force greater than the force exerted by a spring contained in the chamber in communication with the atmosphere.

La présente invention a, par conséquent, pour objet une valve autobloquante, en particulier pour récipients aérosols contenant un produit à pulvériser, comportant une tige, au moins partiellement tubulaire pour permettre la sortie du produit pulvérisé, montée coulissante dans un corps de valve, et que l'on enfonce dans le corps de valve pour actionner la pulvérisation, le corps de valve pouvant, d'une part, être mis en communication avec l'atmosphère et, d'autre part, en communication avec le récipient, de préférence à l'aide d'un tube plongeant, un dispositif de rappel de la tige de valve étant relie à la tige et au corps de valve, caractérisée par le fait que le corps de valve est divise par un joint en deux chambres, une première chambre qui peut être mise en communication avec l'atmosphère lorsqu'on enfonce la tige et une seconde chambre qui est en communication avec le récipient, que le joint est susceptible de coulisser, d'une part, sur la paroi interne du corps de valve et, d'autre part, sur la tige de valve entre une butée disposée sur ladite tige de valve et une position où une communication est établie entre la première et la deuxième chambres, un ressort étant disposé dans la première chambre entre le joint et une partie de la tige, ledit ressort exerçant sur le joint une force déterminée égale à la force antagoniste qui est exercée sur le joint par la pression minimale de pulvérisation et le dispositif de rappel étant dispose dans la deuxième chambre entre la tige et le corps de valve.The present invention therefore relates to a self-locking valve, in particular for aerosol containers containing a product to be sprayed, comprising a rod, at least partially tubular to allow the outlet of the sprayed product, slidingly mounted in a valve body, and that is pushed into the valve body to activate the spraying, the valve body being able, on the one hand, to be placed in communication with the atmosphere and, on the other hand, in communication with the container, preferably using a dip tube, a valve stem return device being connected to the stem and to the valve body, characterized in that the valve body is divided by a seal in two chambers, a first chamber which can be placed in communication with the atmosphere when the stem is pressed and a second chamber which is in communication with the container, that the seal is capable of sliding, on the one hand, on the internal wall of the valve body and, on the other hand, on the valve stem between a stop disposed on said stem valve and a position where communication is established between the first and second chambers, a spring being disposed in the first chamber between the seal and a part of the rod, said spring exerting on the seal a determined force equal to the opposing force which is exerted on the seal by the minimum spray pressure and the return device being arranged in the second chamber between the rod and the valve body.

Le joint séparant les deux chambres est avantageusement constitué par une rondelle enfilée autour de la tige, la butée étant constituée par une collerette de la tige située du côté du joint tourné vers la seconde chambre. Le joint est, de préférence, un joint élastique.The joint separating the two chambers is advantageously constituted by a washer threaded around the rod, the stop being constituted by a collar of the rod situated on the side of the joint facing the second chamber. The seal is preferably an elastic seal.

Selon un mode de réalisation particulier de l'invention, la tige est percée d'un alésage perpendiculaire à son axe qui s'ouvre dans la partie tubulaire de la tige et qui, lorsque la tige est enfoncée s'ouvre à l'intérieur de la première chambre de façon à mettre en communication ladite première chambre et l'atmosphère tandis qu'au repos cet alésage est isolé de la première chambre. La tige comporte de préférence, au niveau de la première chambre, au moins une rainure qui permet de mettre en communication les première et seconde chambres, par coulissement relatif de la tige et du joint, cette rainure étant fermée lorsque le joint est en appui contre la butée.According to a particular embodiment of the invention, the rod is pierced with a bore perpendicular to its axis which opens in the tubular part of the rod and which, when the rod is pressed opens inside the first chamber so as to connect said first chamber and the atmosphere while at rest this bore is isolated from the first chamber. The rod preferably comprises, at the level of the first chamber, at least one groove which makes it possible to put the first and second chambers into communication, by relative sliding of the rod and of the seal, this groove being closed when the seal is in abutment against the stop.

Entre le ressort et le joint est, de préférence, disposée une cupule annulaire formant support de joint. Cette cupule a l'avantage de permettre une meilleure répartition de la force exercée par le ressort sur le joint, et évite tout risque de détérioration du joint par le ressort.Between the spring and the seal is preferably arranged an annular cup forming a seal support. This cup has the advantage of allowing a better distribution of the force exerted by the spring on the seal, and avoids any risk of deterioration of the seal by the spring.

Le dispositif de rappel de la tige contenu dans la seconde chambre est, de préférence, constitué par un ressort.The rod return device contained in the second chamber is preferably constituted by a spring.

Avantageusement, la deuxième chambre est pourvue d'une prise de gaz additionnel. Cette prise de gaz additionnel est, par exemple, constituée par une ouverture percée dans le fond du corps de valve, qui permet une entrée dans le corps de valve de la phase gazeuse qui s'est rassemble dans la partie supérieure du récipient. On a constaté que cette prise de gaz additionnel permet d'obtenir une bonne pulvérisation.Advantageously, the second chamber is provided with an additional gas intake. This additional gas intake is, for example, constituted by an opening pierced in the bottom of the valve body, which allows entry into the valve body of the gaseous phase which collects in the upper part of the container. It has been found that this additional gas intake makes it possible to obtain good spraying.

Une telle valve autobloquante est particulièrement destinée à un récipient aérosol utilisant un gaz comprime (air, azote par exemple) comme propulseur, gaz dont la pression diminue progressivement à la suite des utilisations.Such a self-locking valve is particularly intended for an aerosol container using a compressed gas (air, nitrogen for example) as propellant, a gas whose pressure gradually decreases after use.

Cette diminution de la pression du gaz propulseur, dans une plage de pression restant supérieure à la pression minimale de blocage de la valve, provoque, logiquement, une chute de débit de pulvérisation du produit.This reduction in the pressure of the propellant gas, in a pressure range remaining greater than the minimum blocking pressure of the valve, logically causes a drop in the spraying rate of the product.

Pour remédier à cet inconvénient, des boutons-poussoirs dits "régulateurs" ont été proposes en vue d'assurer une assez bonne constance du débit. Mais ces boutons-poussoirs s'avèrent inutilisables avec des produits de coiffage, par exemple du type laque, car les produits sèchent très rapidement à l'air libre et entraînent le blocage du mécanisme interne de ces boutons-poussoirs.To overcome this drawback, so-called "regulator" pushbuttons have been proposed in order to ensure fairly good flow constancy. However, these push buttons prove to be unusable with styling products, for example of the lacquer type, because the products dry very quickly in the open air and cause the mechanism to block. internal of these pushbuttons.

L'invention a également pour but de fournir une valve autobloquante, dont la tige comporte une rainure comme indiqué précédemment, qui permet d'assurer un débit de produit pulvérise aussi régulier que possible sans que le séchage du produit devienne trop gênant.The invention also aims to provide a self-locking valve, the rod of which has a groove as indicated above, which ensures a flow rate of sprayed product as regular as possible without the drying of the product becoming too troublesome.

On a trouvé que l'on peut obtenir une bonne constance du débit de pulvérisation lorsque la rainure de la tige de valve présente, en coupe perpendiculaire à l'axe du corps de valve, une surface croissante le long d'une direction parallèle à l'axe de la tige de valve, la section la plus grande étant située du côte de la seconde chambre.It has been found that good constancy of the spraying rate can be obtained when the groove of the valve stem has, in section perpendicular to the axis of the valve body, an increasing surface along a direction parallel to the 'axis of the valve stem, the largest section being located on the side of the second chamber.

La présente invention a, par conséquent, également pour objet, une valve autobloquante, telle que définie précédemment et dans laquelle une communication est établie entre la première et la seconde chambres, grâce à une rainure ménagée dans la tige de valve, caractérisée par le fait que la rainure ménagée sur la tige de valve présente, en coupe perpendiculaire à l'axe de la tige, une section croissante le long d'une direction parallèle à l'axe de la tige de valve, la section la plus grande étant située du côte de la seconde chambre, de sorte que la section de passage, offerte au produit à distribuer, augmente lorsque la pression diminue dans le récipient.The present invention therefore, also has for its object, a self-locking valve, as defined above and in which a communication is established between the first and the second chambers, by virtue of a groove made in the valve stem, characterized by the fact that the groove formed on the valve stem has, in section perpendicular to the axis of the stem, an increasing section along a direction parallel to the axis of the valve stem, the largest section being located from the side of the second chamber, so that the passage section, offered to the product to be dispensed, increases when the pressure decreases in the container.

Les moyens assurant la régulation du débit de produit à pulvériser se trouvent ainsi sur la valve, à l'intérieur du bidon aérosol, de sorte que les risques de séchage du produit se trouvent diminués.The means ensuring the regulation of the flow of product to be sprayed are thus located on the valve, inside the aerosol can, so that the risks of drying of the product are reduced.

De préférence, le fond de la rainure s'écarte progressivement de la surface extérieure de la tige, de sorte que la profondeur de la rainure augmente, dans le sens qui va de la première chambre vers la deuxième chambre.Preferably, the bottom of the groove gradually deviates from the outer surface of the rod, so that the depth of the groove increases, in the direction from the first chamber towards the second bedroom.

Le fond peut être constitué par une surface plane dont la coupe par un plan moyen passant par l'axe de la tige est un segment rectiligne.The bottom may be constituted by a flat surface, the section of which by a mean plane passing through the axis of the rod is a straight segment.

La coupe de la rainure, par un tel plan moyen, a avantageusement la forme d'un triangle rectangle dont un côté est situé sur la surface extérieure de la tige, dont l'autre côté est situé vers la deuxième chambre, et dont l'hypoténuse est située dans la tige.The section of the groove, by such a mean plane, advantageously has the shape of a right triangle, one side of which is situated on the external surface of the rod, the other side of which is situated towards the second chamber, and the hypotenuse is located in the stem.

La largeur périphérique de la rainure peut augmenter progressivement dans le sens qui va de la première chambre vers la deuxième chambre.The peripheral width of the groove can gradually increase in the direction from the first chamber to the second chamber.

L'augmentation progressive de largeur peut être combinée avec l'augmentation progressive de profondeur.The progressive increase in width can be combined with the progressive increase in depth.

Pour mieux faire comprendre l'invention, on va en décrire, ci-après, à titre purement illustratif et non limitatif, des modes de réalisations particuliers représentés sur les dessins annexés.To better understand the invention, we will describe below, purely by way of illustration and not limitation, particular embodiments shown in the accompanying drawings.

La figure 1, de ces dessins, est une coupe longitudinale d'une valve autobloquante conforme à l'invention en position de repos ou de fermeture.Figure 1 of these drawings is a longitudinal section of a self-locking valve according to the invention in the rest or closed position.

La figure 2 montre, semblablement à la figure 1, la valve en position d'ouverture avec la tige enfoncée, la pression dans le bidon étant suffisante.Figure 2 shows, similarly to Figure 1, the valve in the open position with the rod pressed, the pressure in the container being sufficient.

La figure 3 montre la valve avec tige enfoncée, alors que la pression dans le bidon est insuffisante.Figure 3 shows the valve with stem pushed in, while the pressure in the container is insufficient.

La figure 4 est une vue en coupe longitudinale d'une variante de réalisation de la valve autobloquante en position de repos ou de fermeture.Figure 4 is a longitudinal sectional view of an alternative embodiment of the self-locking valve in the rest or closed position.

La figure 5 montre en élévation la tige de valve de la figure 4.Figure 5 shows in elevation the valve stem of Figure 4.

La figure 6 est une coupe suivant la ligne VI-VI de la figure 5.Figure 6 is a section along the line VI-VI of figure 5.

La figure 7 montre, semblablement à la figure 4, la valve en position d'ouverture avec la tige enfoncée, la pression dans le bidon étant suffisante.Figure 7 shows, similarly to Figure 4, the valve in the open position with the rod pressed, the pressure in the container being sufficient.

La figure 8, enfin, montre partiellement la valve de la figure 4 avec tige enfoncée, alors que la pression dans le bidon est insuffisante.Figure 8, finally, partially shows the valve of Figure 4 with pressed rod, while the pressure in the container is insufficient.

La figure 1 représente la valve autobloquante selon l'invention, désignée dans son ensemble par 1, en position de repos. La valve 1 est constituée par une tige 2 et par un corps de valve 3. La valve 1 est insérée dans la coupelle de fermeture 4 d'un récipient aérosol (non représenté). L'étanchéite entre la coupelle de fermeture 4, la tige 2 et le corps de valve 3 est assurée à l'aide d'un joint élastique 5 dans lequel la tige 2 peut coulisser de façon étanche.FIG. 1 represents the self-locking valve according to the invention, generally designated by 1, in the rest position. The valve 1 is constituted by a rod 2 and by a valve body 3. The valve 1 is inserted into the closure cup 4 of an aerosol container (not shown). The seal between the closure cup 4, the rod 2 and the valve body 3 is ensured by means of an elastic seal 5 in which the rod 2 can slide in leaktight manner.

Le corps de valve 3 est divisé, par un joint élastique 6, en deux chambres, une première chambre A qui peut être mise en communication avec l'atmosphère et une seconde chambre B qui est en communication permanente avec le récipient aérosol contenant le produit à pulvériser et le gaz propulseur, par l'intermédiaire d'un tube plongeur 7.The valve body 3 is divided, by an elastic seal 6, into two chambers, a first chamber A which can be placed in communication with the atmosphere and a second chamber B which is in permanent communication with the aerosol container containing the product to spray and the propellant, via a dip tube 7.

Le joint 6 est constitué par une rondelle, en particulier en matière élastomère, enfilée autour de la tige 2, avec son plan moyen orthogonal à l'axe de la tige.The seal 6 consists of a washer, in particular of elastomeric material, threaded around the rod 2, with its mean plane orthogonal to the axis of the rod.

Le fond de la chambre B est percé d'une prise de gaz additionnel 8. Ladite prise 8 met la chambre B directement en communication avec le gaz qui se rassemble dans la partie supérieure du récipient aérosol. La chambre B contient un dispositif de rappel de la tige constitue par un ressort 9 dispose entre une face d'une butée annulaire 21 de la tige 2 et le fond de la chambre B. Le joint 6, en position de repos de la valve, est disposé sur l'autre face de la butée 21.The bottom of chamber B is pierced with an additional gas intake 8. Said intake 8 places chamber B directly in communication with the gas which collects in the upper part of the aerosol container. Chamber B contains a rod return device constituted by a spring 9 arranged between one face of an annular stop 21 of the rod 2 and the bottom of chamber B. The seal 6, in the valve rest position, is arranged on the other face of the stop 21.

La tige 2 est tubulaire dans sa partie 22 tournée vers l'extérieur, cette partie tubulaire 22 s'étendant jusqu'à un niveau de la tige 2, tel que, en position de repos, il soit contenu dans la chambre A. La tige 2 est percée d'un alésage 23 perpendiculaire à l'axe de la tige 2 qui s'ouvre dans la partie tubulaire 22 de la tige et qui est situé à un niveau tel qu'en position de repos de la tige 2 il soit ferme par le joint 5.The rod 2 is tubular in its part 22 facing outwards, this tubular part 22 extending up to a level of the rod 2, such that, in the rest position, it is contained in the chamber A. The rod 2 is pierced with a bore 23 perpendicular to the axis of the rod 2 which opens in the tubular part 22 of the rod and which is located at a level such that in the rest position of the rod 2 it is firm by the seal 5.

La tige 2 est pourvue d'une rainure 25, rectiligne longitudinale, qui s'étend du voisinage de la butée 21 à un épaulement 24 de la tige 2. La chambre A contient une cupule annulaire 10 qui repose sur une face du joint 6.The rod 2 is provided with a longitudinal rectilinear groove 25, which extends from the vicinity of the stop 21 to a shoulder 24 of the rod 2. The chamber A contains an annular cup 10 which rests on one face of the seal 6.

La chambre A contient en outre un ressort 11 qui est disposé entre un épaulement annulaire 24 de la tige et la cupule annulaire 10. Le ressort 11 est choisi de façon qu'il exerce sur le joint 6 une force déterminée qui soit égale à la force antagoniste exercée sur le joint par la pression minimale du gaz pour laquelle il y a une pulvérisation convenable.Chamber A further contains a spring 11 which is disposed between an annular shoulder 24 of the rod and the annular cup 10. The spring 11 is chosen so that it exerts on the seal 6 a determined force which is equal to the force antagonist exerted on the joint by the minimum gas pressure for which there is suitable spraying.

Par exemple, pour la pulvérisation d'une laque pour cheveux, on a constate que l'on obtient une bonne pulvérisation lorsque la pression du gaz est comprise entre environ 2,2 et 3,5 bars. On utilise donc un ressort exerçant une force correspondant à environ 2,2 bars.For example, for spraying a hair spray, it has been observed that good spraying is obtained when the gas pressure is between approximately 2.2 and 3.5 bars. A spring is therefore used which exerts a force corresponding to approximately 2.2 bars.

Le fonctionnement de la valve autobloquante est le suivant.The operation of the self-locking valve is as follows.

Pour actionner la valve on appuie sur la tige 2 de valve de façon à enfoncer celle-ci. La paroi externe de la tige 2 de valve glisse dans le joint 5 et dégage l'alésage 23 qui met en communication la chambre A et la partie tubulaire 22 de la tige de valve 2 (voir figure 2). La chambre A est mise à pression atmosphérique. La pression à l'intérieur du récipient et de la chambre B, si elle est supérieure à la pression minimale admissible, exerce une force supérieure à la force du ressort 11 et de sens contraire. Le joint 6 est repoussé sur la tige côté de la chambre A en comprimant le ressort 11 et en dégageant la rainure 25 creusée dans la tige 2. Le passage du produit de la chambre B vers la chambre A devient possible. Le produit suit le trajet marqué par les flèches f1 sur la figure 2 pour être pulvérisé.To activate the valve, the valve rod 2 is pressed so as to push it in. The external wall of the valve stem 2 slides in the seal 5 and releases the bore 23 which connects the chamber A and the tubular part 22 of the valve stem 2 (see FIG. 2). Chamber A is brought to atmospheric pressure. The pressure inside the container and of chamber B, if it is greater than the minimum admissible pressure, exerts a force greater than the force of the spring 11 and in the opposite direction. The seal 6 is pushed back on the rod side of the chamber A by compressing the spring 11 and releasing the groove 25 hollowed in the rod 2. The passage of the product from the chamber B towards the chamber A becomes possible. The product follows the path marked by the arrows f1 in Figure 2 to be sprayed.

Lorsque l'on cesse d'appuyer sur la tige 2, cette dernière coulisse sous l'action du ressort de rappel 9 et revient en position de repos. L'alésage 23 revient au niveau du joint 5 et la communication entre la chambre A et l'atmosphère est coupée. La pression s'équilibre entre les chambres A et B et le joint 6 vient en contact avec la butée 21. La communication entre les chambres A et B par l'intermédiaire de la rainure 25 est coupée. La valve 1 est à nouveau en position de repos ou stockage (voir figure 1).When one stops pressing on the rod 2, the latter slides under the action of the return spring 9 and returns to the rest position. The bore 23 returns to the level of the seal 5 and the communication between the chamber A and the atmosphere is cut off. The pressure is balanced between the chambers A and B and the seal 6 comes into contact with the stop 21. The communication between the chambers A and B by means of the groove 25 is cut. Valve 1 is again in the rest or storage position (see Figure 1).

La figure 3 illustre ce qui se passe lorsque la pression à l'intérieur du récipient est inférieure à la pression minimale admissible.Figure 3 illustrates what happens when the pressure inside the container is below the minimum allowable pressure.

Lorsqu'on appuie sur la tige 2, celle-ci s'enfonce en coulissant dans le joint 5 de sorte que l'alésage 23 est dégage et met la chambre A en communication avec l'atmosphère. La pression dans le réservoir étant trop faible pour repousser le joint 6 à l'encontre du ressort 11, ce joint 6 demeure en appui contre la butée 21 sous l'action du ressort 11. La rainure 25 n'est pas dégagée. La communication entre les chambres A et B n'est pas possible. La pulvérisation du produit n'est donc également pas possible.When the rod 2 is pressed, the latter is pushed in by sliding in the joint 5 so that the bore 23 is released and puts the chamber A in communication with the atmosphere. The pressure in the reservoir being too low to push the seal 6 against the spring 11, this seal 6 remains in abutment against the stop 21 under the action of the spring 11. The groove 25 is not released. Communication between rooms A and B is not possible. Spraying of the product is therefore also not possible.

En se reportant aux figures 4 et suivantes, on peut voir une variante de réalisation de la valve autobloquante, dans laquelle les éléments identiques ou jouant des rôles semblables à des éléments déjà décrits précédemment sont désignés par des références numériques identiques à celles utilisées précédemment, ou égales à la somme du nombre 100 et de la référence précédemment utilisée, sans que leur description soit reprise en détail.Referring to Figures 4 and following, we can see an alternative embodiment of the self-locking valve, in which the identical elements or playing roles similar to elements already described above are designated by identical reference numbers to those used previously, or equal to the sum of the number 100 and the reference previously used, without their description being repeated in detail.

La tige 2 de valve est munie d'une rainure 125 située au niveau de la première chambre A, lorsque la valve est en position de repos comme représente sur la figure 1. Lorsqu'on appuie sur la tige 2 et que la pression exercée par le produit dans le récipient est supérieure à la pression minimale Po, la tige 2 coulisse par rapport au joint 6, comme visible sur la figure 7, et une certaine longueur de la rainure 125 s'ouvre dans la seconde chambre B, ce qui met en communication les première et seconde chambres A, B.The valve stem 2 is provided with a groove 125 situated at the level of the first chamber A, when the valve is in the rest position as shown in FIG. 1. When the stem 2 is pressed and the pressure exerted by the product in the container is greater than the minimum pressure Po, the rod 2 slides relative to the seal 6, as visible in FIG. 7, and a certain length of the groove 125 opens in the second chamber B, which puts in communication the first and second chambers A, B.

La rainure 125 ménagée sur la tige 2 présente, en coupe perpendiculaire à l'axe dudit corps de valve, une section S (voir figure 6) croissante le long d'une direction parallèle à l'axe C de la tige, la section S la plus grande étant située du côté de la chambre B, comme visible sur la figure 4.The groove 125 formed on the rod 2 has, in section perpendicular to the axis of said valve body, a section S (see FIG. 6) increasing along a direction parallel to the axis C of the rod, the section S the largest being located on the side of chamber B, as visible in FIG. 4.

L'augmentation progressive de la section S peut être obtenue par une augmentation progressive de la profondeur radiale h de la rainure. Le fond 125a de la rainure 125 s'écarte alors progressivement de la surface extérieure 2a de la tige, comme visible sur les figures 4 et 7.The gradual increase in section S can be obtained by a gradual increase in the radial depth h of the groove. The bottom 125 a of the groove 125 then gradually moves away from the external surface 2 a of the rod, as visible in FIGS. 4 and 7.

Le fond 125a peut être constitue par une surface plane dont la coupe, par un plan moyen passant par l'axe C, est un segment rectiligne. La coupe de la rainure 125, par un tel plan, a la forme d'un triangle rectangle dont un côte 125b est situé sur la surface extérieure 2a de la tige, dont l'autre côte 125c, orthogonal à l'axe C, est situé vers la deuxième chambre et dont l'hypoténuse est située dans la tige 2 et appartient au fond 125a.The bottom 125 a can be constituted by a flat surface whose section, by a mean plane passing through the axis C, is a rectilinear segment. The section of the groove 125, by such a plane, has the shape of a triangle rectangle with one side 125 b located on the outer surface 2 a of the stem, the other side 125 c , orthogonal to the axis C, is located towards the second chamber and whose hypotenuse is located in the stem 2 and belongs to the bottom 125 a .

Avantageusement, l'extrémité de la rainure 125, tournée vers la deuxième chambre B, est située, lorsque la valve est au repos, dans l'épaisseur du joint 6, comme visible sur la figure 4 ; le côte 125c est situé sensiblement à mi-épaisseur.Advantageously, the end of the groove 125, facing the second chamber B, is situated, when the valve is at rest, in the thickness of the seal 6, as visible in FIG. 4; the 125 c rib is located substantially at mid-thickness.

La largeur périphérique l, de préférence, augmente progressivement dans le sens qui va de la première chambre vers la deuxième chambre, comme visible sur la figure 5.The peripheral width 1 , preferably, gradually increases in the direction from the first chamber to the second chamber, as can be seen in FIG. 5.

Les augmentations de la profondeur h et de la largeur l peuvent être combinées. En variante, seule l'une des deux grandeurs h, l varie, alors que l'autre reste constante.The increases in depth h and width l can be combined. As a variant, only one of the two quantities h , l varies, while the other remains constant.

Mais, dans tous les cas, plus la tige 2 est enfoncée relativement au joint 6 (voir figure 7), plus la section de passage offerte au produit à pulvériser diminue.However, in all cases, the more the rod 2 is pressed relative to the seal 6 (see FIG. 7), the more the passage section offered to the product to be sprayed decreases.

La chambre A contient une cupule annulaire 10 qui repose sur une face du joint 6. Elle contient en outre un ressort 11 qui est dispose entre un épaulement annulaire 24 de la tige 2 de valve et la cupule annulaire 10. Le ressort 11 est choisi de façon qu'il exerce sur le joint 6 une force déterminée qui soit égale à la force antagoniste exercée sur le joint par la pression minimale du gaz pour laquelle il y a une pulvérisation convenable.Chamber A contains an annular cup 10 which rests on one face of the seal 6. It also contains a spring 11 which is arranged between an annular shoulder 24 of the valve stem 2 and the annular cup 10. The spring 11 is chosen to so that it exerts on the joint 6 a determined force which is equal to the opposing force exerted on the joint by the minimum pressure of the gas for which there is suitable spraying.

Le fonctionnement de la valve 1 autobloquante est le suivant.The operation of the self-locking valve 1 is as follows.

Pour actionner la valve 1, on appuie sur la tige 2 de valve de façon à enfoncer celle-ci. Le joint 5 glisse sur la paroi externe de la tige 2 de valve et dégage l'alésage 23 qui met en communication la chambre A et la partie tubulaire 22 de la tige 2 de valve. La chambre A est mise à pression atmosphérique. La pression à l'intérieur du récipient et de la chambre B, si elle est supérieure à la pression minimale admissible, exerce une force supérieure à la force du ressort 11 et de sens contraire. Le joint 6 est repousse sur la tige 2 de valve du côte de la chambre A en comprimant le ressort 11 et en dégageant la rainure 125 creusée dans la tige 2 de valve, comme illustre sur la figure 7.To actuate the valve 1, the valve rod 2 is pressed so as to push the latter. The seal 5 slides on the external wall of the valve stem 2 and releases the bore 23 which connects the chamber A and the tubular part 22 of the valve stem 2. Chamber A is brought to atmospheric pressure. The pressure inside the container and of chamber B, if it is greater than the minimum admissible pressure, exerts a force greater than the force of the spring 11 and in the opposite direction. The seal 6 is pushed back onto the valve stem 2 from the side of the chamber A by compressing the spring 11 and releasing the groove 125 hollowed out in the valve stem 2, as illustrated in FIG. 7.

On voit que plus la pression est élevée, plus le joint 6 est repousse et plus la section transversale de la rainure au niveau du joint 6 est faible.It can be seen that the higher the pressure, the more the seal 6 is pushed back and the smaller the cross section of the groove at the seal 6.

Au contraire plus la pression exercée sur le joint par le produit contenu dans la chambre B diminue, plus la section transversale de la rainure 125 au niveau du joint 6 est grande.On the contrary, the more the pressure exerted on the seal by the product contained in the chamber B decreases, the greater the cross section of the groove 125 at the seal 6.

L'augmentation de la section de passage permet de compenser, au moins partiellement, la chute de pression et de maintenir sensiblement constant le débit du produit pulvérisé.The increase in the passage section makes it possible to compensate, at least partially, for the drop in pressure and to keep the flow rate of the sprayed product substantially constant.

Lorsqu'on cesse d'appuyer sur la tige 2 de valve, cette dernière coulisse sous l'action du ressort de rappel 9 et revient en position de repos. L'alésage 23 revient au niveau du joint 5 et la communication entre la chambre A et l'atmosphère est coupée. La pression s'équilibre entre les chambres A et B et le joint 6 redescend sur la tige 2 de valve jusqu'à venir en contact avec la butée 21. La communication entre les chambres A et B par l'intermédiaire de la rainure 125 n'est donc plus possible. La valve 1 est à nouveau en position de repos comme montre sur la figure 4.When you stop pressing the valve stem 2, the latter slides under the action of the return spring 9 and returns to the rest position. The bore 23 returns to the level of the seal 5 and the communication between the chamber A and the atmosphere is cut off. The pressure is balanced between the chambers A and B and the seal 6 goes down again on the valve stem 2 until it comes into contact with the stop 21. The communication between the chambers A and B via the groove 125 n is therefore no longer possible. The valve 1 is again in the rest position as shown in FIG. 4.

Comme illustré sur la figure 8, lorsque la pression à l'intérieur du récipient est inférieure à la pression minimale Po admissible pour obtenir une pulvérisation convenable, quand on appuie sur la tige 2 de valve, la pulvérisation du produit n'est plus possible, pour les mêmes raisons que celles exposées à propos de la figure 3.As illustrated in Figure 8, when the pressure inside the container is less than the minimum pressure Po permissible to obtain a suitable spray, when the valve rod 2 is pressed, the spraying of the product is no longer possible, for the same reasons as those explained above in Figure 3.

Claims (14)

1 - Valve autobloquante (1), en particulier pour récipients aérosols contenant un produit à pulvériser, comportant une tige (2), au moins partiellement tubulaire pour la sortie du produit pulvérisé, montée coulissante dans un corps de valve (3), et que l'on enfonce dans le corps de valve (3) pour actionner la pulvérisation, le corps de valve (3) pouvant, d'une part, être mis en communication avec l'atmosphère, et, d'autre part, en communication avec le récipient, de préférence à l'aide d'un tube plongeur (7), un dispositif de rappel (9) de la tige de valve étant relié à la tige (2) et au corps de valve (3), caractérisée par le fait que le corps de valve (3) est divisé par un joint (6) en deux chambres, une première chambre (A) qui peut être mise en communication avec l'atmosphère lorsqu'on enfonce la tige (2) et une seconde chambre (B) qui est en communication avec le récipient, que le joint (6) est susceptible de coulisser, d'une part, sur la paroi interne du corps (3) de valve et, d'autre part, sur la tige (2) de valve entre une butée (21) disposée sur ladite tige (2) de valve et une position où une communication est établie entre la première et la deuxième chambres, un ressort (11) étant disposé dans la première chambre entre le joint (6) et une partie (24) de la tige (2), ledit ressort (11) exerçant sur le joint une force déterminée égale à la force antagoniste qui est exercée, sur le joint, par la pression minimale de pulvérisation et le dispositif de rappel (9) étant disposé dans la deuxième chambre entre la tige (2) et le corps (3) de valve. 1 - Self-locking valve (1), in particular for aerosol containers containing a spray product, comprising a rod (2), at least partially tubular for the outlet of the spray product, slidingly mounted in a valve body (3), and that it is pushed into the valve body (3) to activate the spraying, the valve body (3) being able, on the one hand, to be placed in communication with the atmosphere, and, on the other hand, in communication with the container, preferably using a dip tube (7), a return device (9) of the valve stem being connected to the stem (2) and to the valve body (3), characterized by the fact that the valve body (3) is divided by a seal (6) into two chambers, a first chamber (A) which can be placed in communication with the atmosphere when the rod (2) is pressed and a second chamber (B) which is in communication with the container, that the seal (6) is capable of sliding, on the one hand, on the internal wall of the c valve orps (3) and, on the other hand, on the valve stem (2) between a stop (21) disposed on said valve stem (2) and a position where communication is established between the first and the second chambers, a spring (11) being arranged in the first chamber between the seal (6) and a part (24) of the rod (2), said spring (11) exerting on the seal a determined force equal to the opposing force which is exerted, on the seal, by the minimum spray pressure and the return device (9) being disposed in the second chamber between the rod (2) and the valve body (3). 2 - Valve selon la revendication 1, caractérisée par le fait que le joint (6) est constitué par une rondelle enfilée autour de la tige (2), la butée (21) étant constituée par une collerette de la tige (2) située du côté du joint tourné vers la seconde chambre (B). 2 - Valve according to claim 1, characterized in that the seal (6) is constituted by a washer threaded around the rod (2), the stop (21) being constituted by a flange of the rod (2) located on the side of the seal facing the second chamber (B). 3 - Valve selon la revendication 1 ou 2, caractérisée par le fait que le joint (6) est un joint élastique. 3 - Valve according to claim 1 or 2, characterized in that the seal (6) is an elastic seal. 4 - Valve selon l'une des revendications 1 à 3, caractérisée par le fait que la tige (2) est percée d'un alésage (23) perpendiculaire à son axe qui s'ouvre dans la partie tubulaire (22) de ladite tige et qui, lorsque la tige (2) est enfoncée, s'ouvre à l'intérieur de la première chambre (A) de façon à mettre en communication ladite première chambre (A) et l'atmosphère, tandis qu'au repos cet alésage (23) est isolé de la première chambre (A). 4 - Valve according to one of claims 1 to 3, characterized in that the rod (2) is pierced with a bore (23) perpendicular to its axis which opens in the tubular part (22) of said rod and which, when the rod (2) is pressed, opens inside the first chamber (A) so as to put said first chamber (A) into communication with the atmosphere, while at rest this bore (23) is isolated from the first chamber (A). 5 - Valve selon l'une des revendications 1 à 4, caractérisée par le fait que la tige comporte au niveau de la première chambre (A), au moins une rainure (125) qui permet de mettre en communication les première et deuxième chambres, par coulissement relatif de la tige et du joint, cette rainure (125) étant fermée lorsque le joint (6) est en appui contre la butée (21). 5 - Valve according to one of claims 1 to 4, characterized in that the rod comprises at the level of the first chamber (A), at least one groove (125) which makes it possible to put the first and second chambers into communication, by relative sliding of the rod and the seal, this groove (125) being closed when the seal (6) is in abutment against the stop (21). 6 - Valve selon la revendication 5, caractérisée par le fait que la rainure (25) est rectiligne longitudinale. 6 - Valve according to claim 5, characterized in that the groove (25) is longitudinal straight. 7 - Valve selon l'une des revendications 1 à 6, caractérisée par le fait qu'entre le ressort (11) et le joint (6) est disposée une cupule annulaire (10) formant support de joint. 7 - Valve according to one of claims 1 to 6, characterized in that between the spring (11) and the seal (6) is arranged an annular cup (10) forming seal support. 8 - Valve selon l'une des revendications 1 à 7, caractérisée par le fait que le dispositif de rappel (9) contenu dans la seconde chambre est constitué par un ressort. 8 - Valve according to one of claims 1 to 7, characterized in that the return device (9) contained in the second chamber is constituted by a spring. 9 - Valve selon l'une des revendications 1 à 8, caractérisée par le fait que la deuxième chambre (B) est pourvue d'une prise de gaz additionnel (8). 9 - Valve according to one of claims 1 to 8, characterized in that the second chamber (B) is provided with an additional gas intake (8). 10 - Valve selon la revendication 5, caractérisée par le fait que la rainure (125) ménagée sur la tige (2) de valve présente, en coupe perpendiculaire à l'axe de la tige de valve, une section croissante le long d'une direction parallèle à l'axe de la tige de valve, la section la plus grande étant située du côté de la seconde chambre (B) de sorte que la section de passage, offerte au produit à distribuer, augmente lorsque la pression diminue dans le récipient. 10 - Valve according to claim 5, characterized in that the groove (125) formed on the valve stem (2) has, in section perpendicular to the axis of the valve stem, an increasing section along a direction parallel to the axis of the valve stem, the largest section being located on the side of the second chamber (B) so that the passage section, offered to the product to be dispensed, increases when the pressure decreases in the container . 11 - Valve selon la revendication 10, caractérisée par le fait que le fond de la rainure (125a) s'écarte progressivement de la surface extérieure de la tige (2), de sorte que la profondeur (h) de la rainure (125) augmente, dans le sens qui va de la première chambre (A) vers la deuxième chambre (B). 11 - Valve according to claim 10, characterized in that the bottom of the groove (125 a ) gradually departs from the outer surface of the rod (2), so that the depth ( h ) of the groove (125 ) increases in the direction from the first chamber (A) to the second chamber (B). 12 - Valve selon la revendication 10 ou 11, caractérisée par le fait que le fond (125a) est constitué par une surface plane dont la coupe par un plan moyen passant par l'axe de la tige (2) est un segment rectiligne. 12 - Valve according to claim 10 or 11, characterized in that the bottom (125 a ) consists of a flat surface whose section through a mean plane passing through the axis of the rod (2) is a straight segment. 13 - Valve selon la revendication 11 ou 12, caractérisée par le fait que la coupe de la rainure (125) par un plan moyen passant par l'axe (C) de la tige (2) a la forme d'un triangle rectangle dont un côté (125b) est situé sur la surface extérieure (2a) de la tige, dont l'autre côté (125c) est situé vers la deuxième chambre (B), et dont l'hypoténuse est située dans la tige (2). 13 - Valve according to claim 11 or 12, characterized in that the cut of the groove (125) by a mean plane passing through the axis (C) of the rod (2) has the shape of a right triangle one side (125 b ) is located on the outer surface (2 a ) of the rod, the other side (125 c ) is located towards the second chamber (B), and whose hypotenuse is located in the rod ( 2). 14 - Valve selon l'une des revendications 10 à 13, caractérisée par le fait que la largeur périphérique (l) de la rainure (125) augmente progressivement de la première chambre (A) vers la deuxième chambre (B). 14 - Valve according to one of claims 10 to 13, characterized in that the peripheral width ( l ) of the groove (125) gradually increases from the first chamber (A) to the second chamber (B).
EP19910400288 1990-04-03 1991-02-07 Self-closing valve especially for an aerosol container Expired - Lifetime EP0450990B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR9004246 1990-04-03
FR9004246A FR2660398B1 (en) 1990-04-03 1990-04-03 SELF-LOCKING VALVE, ESPECIALLY FOR AEROSOL CONTAINER.
FR9012402A FR2667673B2 (en) 1990-04-03 1990-10-09 SELF-LOCKING VALVE, ESPECIALLY FOR AEROSOL CONTAINER.
FR9012402 1990-10-09

Publications (2)

Publication Number Publication Date
EP0450990A1 true EP0450990A1 (en) 1991-10-09
EP0450990B1 EP0450990B1 (en) 1993-10-06

Family

ID=26227957

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910400288 Expired - Lifetime EP0450990B1 (en) 1990-04-03 1991-02-07 Self-closing valve especially for an aerosol container

Country Status (4)

Country Link
EP (1) EP0450990B1 (en)
DE (1) DE69100458T2 (en)
ES (1) ES2046020T3 (en)
FR (1) FR2667673B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2705323A1 (en) * 1993-05-17 1994-11-25 Oreal Spray valve for aerosol container, and aerosol container equipped with such a valve
US5704161A (en) * 1992-09-04 1998-01-06 Southpac Trust International, Inc. Plant cover and sleeve formed from two materials
EP0931734A1 (en) 1998-01-23 1999-07-28 L'oreal Valve for regulating a fluid flow and container equipped with such a valve
WO2002031402A1 (en) * 2000-10-12 2002-04-18 Kim, Yong-Su A refilled type butane gas cask
EP1291293A1 (en) * 2001-09-10 2003-03-12 L'oreal Valve with variable discharge and container having such valve

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW376128U (en) * 1998-04-29 1999-12-01 Topeak Inc Micro pressure reducing tools

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2837249A (en) * 1957-05-10 1958-06-03 Meshberg Philip Aerosol valve
CH335576A (en) * 1954-09-20 1959-01-15 Meshberg Philip Valve device for controlling the flow rate of a pressurized fluid in a container
US3018928A (en) * 1958-11-24 1962-01-30 Meshberg Philip Metering valve
BE709202A (en) * 1967-01-20 1968-05-16
AT303604B (en) * 1970-03-16 1972-12-11 Alusuisse Self-flushing pressure valve
GB1321272A (en) * 1969-10-20 1973-06-27 Pittway Corp Pressurised dispensing containers and valves thereof
DE2264061A1 (en) * 1971-12-29 1973-07-05 Int Fire Tool Corp PRESSURE VESSEL FOR LIQUID GAS
DD103041A5 (en) * 1972-03-27 1974-01-05
AT326032B (en) * 1971-07-27 1975-11-25 Coster Tecnologie Speciali Spa VALVE FOR AEROSOL TANK

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH335576A (en) * 1954-09-20 1959-01-15 Meshberg Philip Valve device for controlling the flow rate of a pressurized fluid in a container
US2837249A (en) * 1957-05-10 1958-06-03 Meshberg Philip Aerosol valve
US3018928A (en) * 1958-11-24 1962-01-30 Meshberg Philip Metering valve
BE709202A (en) * 1967-01-20 1968-05-16
GB1321272A (en) * 1969-10-20 1973-06-27 Pittway Corp Pressurised dispensing containers and valves thereof
AT303604B (en) * 1970-03-16 1972-12-11 Alusuisse Self-flushing pressure valve
AT326032B (en) * 1971-07-27 1975-11-25 Coster Tecnologie Speciali Spa VALVE FOR AEROSOL TANK
DE2264061A1 (en) * 1971-12-29 1973-07-05 Int Fire Tool Corp PRESSURE VESSEL FOR LIQUID GAS
DD103041A5 (en) * 1972-03-27 1974-01-05

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5704161A (en) * 1992-09-04 1998-01-06 Southpac Trust International, Inc. Plant cover and sleeve formed from two materials
FR2705323A1 (en) * 1993-05-17 1994-11-25 Oreal Spray valve for aerosol container, and aerosol container equipped with such a valve
EP0931734A1 (en) 1998-01-23 1999-07-28 L'oreal Valve for regulating a fluid flow and container equipped with such a valve
WO2002031402A1 (en) * 2000-10-12 2002-04-18 Kim, Yong-Su A refilled type butane gas cask
EP1291293A1 (en) * 2001-09-10 2003-03-12 L'oreal Valve with variable discharge and container having such valve
FR2829475A1 (en) * 2001-09-10 2003-03-14 Oreal VARIABLE FLOW VALVE AND CONTAINER PROVIDED WITH SUCH A VALVE

Also Published As

Publication number Publication date
DE69100458D1 (en) 1993-11-11
FR2667673A2 (en) 1992-04-10
FR2667673B2 (en) 1993-03-19
ES2046020T3 (en) 1994-01-16
DE69100458T2 (en) 1994-05-11
EP0450990B1 (en) 1993-10-06

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