EP0555447B1 - Combination of an aerosol can with a can pressurizing device - Google Patents

Combination of an aerosol can with a can pressurizing device Download PDF

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Publication number
EP0555447B1
EP0555447B1 EP92918290A EP92918290A EP0555447B1 EP 0555447 B1 EP0555447 B1 EP 0555447B1 EP 92918290 A EP92918290 A EP 92918290A EP 92918290 A EP92918290 A EP 92918290A EP 0555447 B1 EP0555447 B1 EP 0555447B1
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EP
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Prior art keywords
aerosol
lever
combination according
compressor
base
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EP92918290A
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German (de)
French (fr)
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EP0555447A1 (en
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Charles Kaeser
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
    • B65B31/003—Adding propellants in fluid form to aerosol containers

Definitions

  • the present invention relates to a combination of an aerosol can with a pressurizing device, this box comprising a closed enclosure containing said aerosol and air, this enclosure being equipped with a spraying device arranged at its end. upper, of a base arranged to receive a filling nozzle of the pressurizing device, this base being provided with a non-return valve of the pressurized air contained in said box, the pressurizing device comprising a housing comprising a housing for receiving an aerosol can and containing an electric pump constituting an air compressor, means for switching on and off of this air compressor, and coupling means for momentarily coupling the can aerosol with said compressor.
  • a more satisfactory solution consists in reloading an aerosol can with pressurized air when the internal pressure of the can is no longer sufficient to propel the substance of the can.
  • German publication DE-A-3 800 194 describes a device for pressurizing an aerosol can by means of a compressor comprising a filling nozzle and a switch.
  • the defect of this device comes from the fact that it has neither means for coupling the compressor housing to the aerosol can, nor means for controlling the pressure inside the can.
  • the user must therefore hold the box in place manually by pressing it against the bottom to engage the filling nozzle in a non-return valve of the aerosol can, and thus keep the valve open during filling.
  • the user must also remove the aerosol can when he considers that the internal pressure of the can is adequate to allow spraying of the substance, i.e. neither too low nor too high, which could be dangerous.
  • the device described by the utility model DE-U-8 808 407 comprises a frame comprising a compressor with a compressed air tank and a filling nozzle, and an upper arm.
  • the upper arm presses the can against the bottom. This has the effect of opening a non-return valve located at the bottom of the box and engaged in the filling nozzle, which brings the compressed air tank into contact with the inside of the box. The pressure in the tank and in the box is balanced.
  • This device has several faults. It is particularly bulky and therefore impractical.
  • due to the presence and function of the upper arm it only allows the use of boxes which have a determined height. An additional defect of this device comes from the fact that the interior of the box remains in contact with the compressed air reservoir as long as the box remains in the support. Here again, the user must himself remove the box from its support when it considers that the desired internal pressure has been reached.
  • the present invention proposes to overcome all these drawbacks by making a combination of an aerosol can with a pressurizing device, efficient, economical, practical and which completely eliminates the problem of pollution due to propellant gases.
  • the combination according to the invention is characterized in that the base of the can and the pressurizing device comprise locking means for holding the aerosol can in said housing of the housing and in that these coupling means are constituted by means for switching on the compressor when the aerosol can is placed in said housing, and for triggering it when the air pressure inside the can has reached a predetermined value.
  • Said device locking means preferably comprise a lever provided with means for hooking the aerosol can.
  • said lever is housed in an inclined recess formed in said housing, also containing a thrust spring tending to bring said lever into a first high position, defined by a stop member which limits the travel of this lever.
  • the lever comprises a latching notch formed on its lateral face, this notch being arranged to cooperate with a locking pawl of this lever in a second low position in which the thrust spring is compressed.
  • Said pawl may be integral with a piston, one side of which is subjected to the pressure of a calibration spring and the other side of which is subjected to the pressure of the pressurized air contained in the aerosol can.
  • Said piston is advantageously housed in a cavity formed in the housing and divides this cavity into two chambers, one of which contains said calibration spring and the other of which communicates with the aerosol can.
  • the chamber containing the calibration spring has an axial groove arranged to allow the free escape of the gas under pressure when the stroke of the piston exceeds a predetermined value.
  • said lever may include means for cooperating with a switch for switching on and off the compressor, so that this compressor switches on when the lever is brought into its second position and it triggers when the lever is brought into its first position.
  • Said base advantageously comprises latching means arranged to cooperate with said latching means of said lever of the coupling means.
  • said base comprises an annular groove arranged to cooperate with said means for attaching said lever to the coupling means.
  • said base is crimped into a central opening of the enclosure, the part comprising the non-return valve being disposed inside the enclosure and the part comprising said annular groove being disposed at the outside of this enclosure.
  • the device 10 for pressurizing an aerosol can 11 mainly comprises a housing 12, the upper face of which is equipped with a measuring instrument 13 which indicates the pressure of the pressurized air which is injected by the device 10 into the aerosol can 11.
  • the aerosol can is a completely conventional can as a whole, but the bottom of which is equipped, as will be explained in more detail below, means allowing an injection of pressurized air which can be carried out in different ways.
  • the housing 12 contains an electric pump constituting an air compressor 14 consisting on the one hand of a cylinder 15 and a drive motor 16 and on the other hand of minus a compression piston.
  • air compressor 14 consisting on the one hand of a cylinder 15 and a drive motor 16 and on the other hand of minus a compression piston.
  • These compressors are commercially available and are commonly used for various applications such as, for example, inflators for automobile wheels, swimming buoys, air mattresses, inflatable boats, etc., which are currently supplied with electrical energy through a special outlet which can be connected to a cigarette lighter in a motor vehicle. It is understood that any other miniaturized compressor can be used to constitute a source of pressurized air, provided that this compressor makes it possible to obtain compressed air at a pressure at least equal to 8 bars.
  • the housing 12 comprises a housing 17 intended to receive the rear end of the aerosol can.
  • the pressurizing device 10 is equipped with a filling nozzle 18.
  • Coupling means in the form of a lever 19 are provided for coupling the pressurizing device and the aerosol can positioned in the housing 17.
  • FIGS 3 and 4 show a first embodiment of the coupling means associated with the filling nozzle and the aerosol can.
  • the housing 17 defines a platform 20 of circular shape whose diameter is slightly greater than the diameter of the bottom 21 of the aerosol can 11.
  • the filling nozzle 18 which is in the form of a substantially cylindrical part traversed by an axial channel 22, and the peripheral surface of which is fitted with a seal 23 housed in an annular groove 24.
  • the channel 22 has the function of conveying air under pressure generated by the compressor towards the distal end 25 of the nozzle 18, and finally to an enclosure defined inside the aerosol can 11.
  • the bottom of the aerosol can is equipped with a base 26 provided with a ball valve 27 or any other form of suitable non-return valve, and having a cavity 28 whose shape and dimensions correspond to those of the end piece 18 so that the end piece can be engaged in a sealed manner inside this cavity 28.
  • This base of generally cylindrical shape, is engaged in an appropriate central opening formed in the bottom 21 of the aerosol can, and is fixed to this bottom by means of a crimping ring 29.
  • An annular part 30 comprising an annular groove 31 is fixed to the external part of the base 26 and makes it possible to ensure , with a lever 32 integral with the housing of the pressurizing device, the coupling between this device and the corresponding aerosol can.
  • This lever 32 has at its upper end a spout 33 intended to engage in the annular groove 31 and to constitute with the latter means for hooking the lever 32 and the annular part 30, in other words ensuring the coupling between the aerosol can and the pressurizing device of the latter.
  • the lever 32 is housed in an inclined recess 34 formed in the housing 12 and containing a thrust spring 35 which tends to bring this lever into its high position represented by FIG. 3.
  • a stop member constituted by a pin 36 allows, in conjunction with a longitudinal recess 37 to limit the stroke of this lever between two positions, a first high position represented by FIG. 3 and a second low position represented by FIG. 4.
  • This lever also comprises a snap-in notch 38 formed on its lateral face, this notch being arranged to cooperate with a locking pawl 39 secured to a piston 40 housed in a cavity.
  • This piston 40 delimits a chamber 41 in which a calibration spring 42 is arranged and a second chamber 43 which communicates by a duct 44 with the supply duct 22 of the pressurized air formed in the nozzle 18.
  • the lever 32 When the aerosol can 11 is brought into position on the nozzle 18, the lever 32 is pushed towards its low position. The spout 33 of this lever engages in the annular groove 31. When the low position is reached, the pawl 39 engages in the latching notch 38, which has the effect of preventing the lever 32 from rising under the effect of the thrust exerted by the spring 35. In this low position, a compressor start switch is automatically engaged, which has the effect of starting the production of compressed air which is injected through the end piece 18, base 26 and ball valve 27 inside the enclosure formed in the aerosol can 11.
  • the calibration spring 42 is adjusted to a predetermined tension, so that the piston 40 is subjected to two balanced forces when the pressure of the compressed air reaches approximately 8 bars.
  • the compressed air injected into the enclosure of the aerosol can is also at this pressure.
  • the piston 40 is pushed back in the opposite direction to that in which the calibration spring 42 tends to push it back.
  • the pawl 39 emerges from the notch latching 38, which releases the lever 32.
  • this lever is raised to return to its high position by pushing the aerosol can at the same time and by triggering the start-up switch compressor.
  • the ball valve 27 closes, which has the effect of trapping the air contained inside this can. .
  • a safety device is provided to prevent dangerous overpressure in the can.
  • an axial groove 45 is provided in the chamber 41 to ensure the free escape of air if the piston 40 moves back beyond a certain predetermined stroke. This safety is also effective if, for any reason, the compressor does not start when the maximum pressure is reached.
  • the piston 40 is made integral with a plate 46 by means of a screw 47.
  • This plate 46 has a notch 48 located in look of an access recess 49 formed in the base of the housing.
  • the user can then manually push the plate 46, using a suitable tool such as a screwdriver, to bring the piston and the pawl into their withdrawn position which allows the release. lever 32 and release of the aerosol can.
  • This embodiment has the advantage of allowing the use of compressed air as a propellant for the substances to be sprayed in the form of an aerosol. As a result, the ecological and economic problems mentioned above are resolved in a simple and effective manner.

Abstract

PCT No. PCT/CH92/00185 Sec. 371 Date Apr. 27, 1993 Sec. 102(e) Date Apr. 27, 1993 PCT Filed Sep. 9, 1992 PCT Pub. No. WO93/04928 PCT Pub. Date Mar. 18, 1993.A device for pressurizing an aerosol can (11) in order to refill it with propellant gas (10) comprises a housing (12) containing an air compressor (14) which consists of a cylinder (15), a driving motor (16) and a plunger, a filling nozzle (18) for injecting pressurized air into the aerosol can, a mechanism for activating said compressor when a can is fitted to the filling nozzle, and a mechanism for deactivating said compressor when the air injected into the can reaches a predetermined pressure. A coupling member is provided for coupling the device and the aerosol can when the latter is positioned in a seating (17).

Description

La présente invention concerne une combinaison d'une boîte d'aérosol avec un dispositif de mise sous pression, cette boîte comportant une enceinte fermée contenant ledit aérosol et de l'air, cette enceinte étant équipée d'un dispositif de pulvérisation ménagé à son extrémité supérieure, d'une embase agencée pour recevoir un embout de remplissage du dispositif de mise sous pression, cette embase étant pourvue d'une soupape anti-retour de l'air sous pression contenu dans ladite boîte, le dispositif de mise sous pression comportant un boîtier comprenant un logement pour recevoir une boîte d'aérosol et contenant une pompe électrique constituant un compresseur d'air, des moyens d' enclenchement et de déclenchement de ce compresseur d'air, et des moyens de couplage pour coupler momentanément la boîte d'aérosol avec ledit compresseur.The present invention relates to a combination of an aerosol can with a pressurizing device, this box comprising a closed enclosure containing said aerosol and air, this enclosure being equipped with a spraying device arranged at its end. upper, of a base arranged to receive a filling nozzle of the pressurizing device, this base being provided with a non-return valve of the pressurized air contained in said box, the pressurizing device comprising a housing comprising a housing for receiving an aerosol can and containing an electric pump constituting an air compressor, means for switching on and off of this air compressor, and coupling means for momentarily coupling the can aerosol with said compressor.

Le problème des aérosols et des gaz propulseurs nocifs pour la couche d' ozone a été largement débattu dans tous les milieux scientifiques et industriels qui ont tenté de trouver des solutions de remplacement efficaces et économiques.The problem of aerosols and propellants harmful to the ozone layer has been widely discussed in all scientific and industrial circles which have attempted to find effective and economical alternatives.

On a constaté que le gaz propulseur qui éviterait tous les problèmes de pollution de l'atmosphère et qui, de ce fait, constituerait la solution optimale, à savoir l'air, ne peut pas être maintenu sous une pression suffisante à l'intérieur d'une boîte d' aérosol pendant la durée de stockage et d' utilisation. On s'est donc orienté vers d'autres solutions beaucoup moins satisfaisantes d'un point de vue économique et écologique, mais qui résolvent le problème immédiat de l' utilisateur. Ce problème consiste à disposer dans la boîte d'une réserve de pression suffisante pour que la totalité de la substance à pulvériser puisse être utilisée. Les gaz propulseurs actuellement utilisés couramment sont le méthane ou le propane, etc.. Ces gaz sont inflammables, voire explosifs, lorsqu'ils sont mélangés à une certaine proportion d'air et leur utilisation n'exclut pas tout danger.It has been found that the propellant which would avoid all the problems of pollution of the atmosphere and which, therefore, would constitute the optimal solution, namely the air, cannot be maintained under sufficient pressure inside d '' an aerosol can during storage and use. We therefore turned to other solutions which are much less satisfactory from an economic and ecological point of view, but which solve the immediate problem of the user. This problem consists in having in the container a reserve of sufficient pressure so that all of the substance to be sprayed can be used. The propellants currently used commonly are methane or propane, etc. These gases are flammable or even explosive when mixed with a certain proportion of air and their use does not exclude all danger.

Par ailleurs, d'un point de vue économique, cette utilisation s'apparente à du gaspillage d'énergie, étant donné qu'il est certainement plus utile de consommer ces gaz combustibles comme sources d'énergie que comme propulseurs libérés dans l'atmosphère. Enfin, ces gaz ne peuvent généralement pas être mélangés aux substances à pulvériser, ce qui nécessite un conditionnement de ces substances dans des poches souples appropriées en aluminium, en matière synthétique ou en matériaux composites sous forme de films de faible épaisseur.Furthermore, from an economic point of view, this use is similar to a waste of energy, since it is certainly more useful to consume these combustible gases as sources of energy than as propellants released into the atmosphere. . Finally, these gases cannot generally be mixed with the substances to be sprayed, which requires packaging of these substances in suitable flexible bags of aluminum, synthetic material or composite materials in the form of thin films.

Une solution plus satisfaisante consiste à recharger une boîte d' aérosol en air sous pression lorsque la pression intérieure de la boîte ne suffit plus à propulser la substance de la boîte.A more satisfactory solution consists in reloading an aerosol can with pressurized air when the internal pressure of the can is no longer sufficient to propel the substance of the can.

On connaît déjà différents dispositifs de mise sous pression de boîtes d'aérosol décrits notamment dans la publication allemande DE-A-3 800 194 et dans le modèle d'utilité DE-U-8 808 407.Various devices are already known for pressurizing aerosol cans, described in particular in the German publication DE-A-3 800 194 and in the utility model DE-U-8 808 407.

La publication allemande DE-A-3 800 194 décrit un dispositif de mise sous pression d'une boîte d'aérosol au moyen d'un compresseur comportant un embout de remplissage et un interrupteur. Le défaut de cet appareil provient du fait qu'il ne comporte ni moyens de couplage du boîtier du compresseur à la boîte d' aérosol, ni moyens de contrôle de la pression à l'intérieur de la boîte. L' utilisateur doit donc maintenir la boîte en place manuellement en pressant celle-ci contre le bas pour engager l'embout de remplissage dans un clapet anti-retour de la boîte d'aérosol, et ainsi maintenir le clapet ouvert pendant le remplissage. L'utilisateur doit en outre retirer la boîte d'aérosol lorsqu'il estime que la pression intérieure de la boîte est adéquate pour permettre la pulvérisation de la substance, c'est-à-dire ni trop basse , ni trop élevée, ce qui pourrait être dangereux.The German publication DE-A-3 800 194 describes a device for pressurizing an aerosol can by means of a compressor comprising a filling nozzle and a switch. The defect of this device comes from the fact that it has neither means for coupling the compressor housing to the aerosol can, nor means for controlling the pressure inside the can. The user must therefore hold the box in place manually by pressing it against the bottom to engage the filling nozzle in a non-return valve of the aerosol can, and thus keep the valve open during filling. The user must also remove the aerosol can when he considers that the internal pressure of the can is adequate to allow spraying of the substance, i.e. neither too low nor too high, which could be dangerous.

Le dispositif décrit par le modèle d'utilité DE-U-8 808 407 comporte un bâti comprenant un compresseur avec un réservoir d'air comprimé et un embout de remplissage, et un bras supérieur. Lorsque l'on engage la boîte d'aérosol dans le logement prévu à cet effet dans le bâti, le bras supérieur presse la boîte contre le bas. Ceci a pour effet l'ouverture d'un clapet anti-retour situé au fond de la boîte et engagé dans l'embout de remplissage, qui met en contact le réservoir d'air comprimé et l'intérieur de la boîte. La pression dans le réservoir et dans la boîte s'équilibre. Ce dispositif présente plusieurs défauts. Il est notamment volumineux et donc peu pratique. En outre, de par la présence et la fonction du bras supérieur, il ne permet d'utiliser que des boîtes qui ont une hauteur déterminée. Un défaut supplémentaire de ce dispositif vient du fait que l'intérieur de la boîte reste en contact avec le réservoir d'air comprimé aussi longtemps que la boîte reste dans le support. Ici encore, l'utilisateur doit lui-même retirer la boîte de son support lorsqu'il estime que la pression intérieure désirée est atteinte.The device described by the utility model DE-U-8 808 407 comprises a frame comprising a compressor with a compressed air tank and a filling nozzle, and an upper arm. When we hire the aerosol can in the housing provided for this purpose in the frame, the upper arm presses the can against the bottom. This has the effect of opening a non-return valve located at the bottom of the box and engaged in the filling nozzle, which brings the compressed air tank into contact with the inside of the box. The pressure in the tank and in the box is balanced. This device has several faults. It is particularly bulky and therefore impractical. In addition, due to the presence and function of the upper arm, it only allows the use of boxes which have a determined height. An additional defect of this device comes from the fact that the interior of the box remains in contact with the compressed air reservoir as long as the box remains in the support. Here again, the user must himself remove the box from its support when it considers that the desired internal pressure has been reached.

En résumé, les solutions actuelles sont dangereuses coûteuses, polluantes et mal pratiques, donc totalement insuffisantes.In summary, current solutions are dangerous, costly, polluting and impractical, and therefore totally insufficient.

La présente invention se propose de pallier tous ces inconvénients en réalisant une combinaison d'une boîte d'aérosol avec un dispositif de mise sous pression, efficace, économique, pratique et qui supprime totalement le problème de la pollution due aux gaz propulseurs.The present invention proposes to overcome all these drawbacks by making a combination of an aerosol can with a pressurizing device, efficient, economical, practical and which completely eliminates the problem of pollution due to propellant gases.

Dans ce but, la combinaison selon l'invention est caractérisée en ce que l'embase de la boîte et le dispositif de mise sous pression comportent des moyens de de verrouillage pour maintenir la boîte d'aérosol dans ledit logement du boîtier et en ce que ces moyens de couplage sont constitués par des moyens pour enclencher le compresseur au moment de la mise en place de la boîte d'aérosol dans ledit logement, et pour le déclencher au moment où la pression de l'air à l'intérieur de la boîte a atteint une valeur prédéterminée.For this purpose, the combination according to the invention is characterized in that the base of the can and the pressurizing device comprise locking means for holding the aerosol can in said housing of the housing and in that these coupling means are constituted by means for switching on the compressor when the aerosol can is placed in said housing, and for triggering it when the air pressure inside the can has reached a predetermined value.

Lesdits moyens de verrouillage du dispositif comportent de préférence un levier pourvu de moyens d'accrochage de la boîte d'aérosol.Said device locking means preferably comprise a lever provided with means for hooking the aerosol can.

De préférence, ledit levier est logé dans un évidement incliné ménagé dans ledit boîtier, contenant également un ressort de poussée tendant à amener ledit levier dans une première position haute, définie par un organe d'arrêt qui limite la course de ce levier.Preferably, said lever is housed in an inclined recess formed in said housing, also containing a thrust spring tending to bring said lever into a first high position, defined by a stop member which limits the travel of this lever.

Dans cette forme de réalisation, le levier comporte une encoche d'encliquetage ménagée sur sa face latérale, cette encoche étant agencée pour coopérer avec un cliquet de verrouillage de ce levier dans une seconde position basse dans laquelle le ressort de poussée est comprimé.In this embodiment, the lever comprises a latching notch formed on its lateral face, this notch being arranged to cooperate with a locking pawl of this lever in a second low position in which the thrust spring is compressed.

Ledit cliquet peut être solidaire d'un piston dont une des faces est soumise à la pression d'un ressort de tarage et dont l'autre face est soumise à la pression de l'air sous pression contenu dans la boîte d'aérosol.Said pawl may be integral with a piston, one side of which is subjected to the pressure of a calibration spring and the other side of which is subjected to the pressure of the pressurized air contained in the aerosol can.

Ledit piston est avantageusement logé dans une cavité ménagée dans le boîtier et divise cette cavité en deux chambres dont l'une contient ledit ressort de tarage et dont l'autre communique avec la boîte d'aérosol.Said piston is advantageously housed in a cavity formed in the housing and divides this cavity into two chambers, one of which contains said calibration spring and the other of which communicates with the aerosol can.

Dans cette forme de réalisation préférée, la chambre contenant le ressort de tarage comporte une gorge axiale agencée pour permettre l'échappement libre du gaz sous pression lorsque la course du piston dépasse une valeur prédéterminée.In this preferred embodiment, the chamber containing the calibration spring has an axial groove arranged to allow the free escape of the gas under pressure when the stroke of the piston exceeds a predetermined value.

Selon une autre forme de réalisation, ledit levier peut comporter des moyens pour coopérer avec un interrupteur d'enclenchement et de déclenchement du compresseur, de telle manière que ce compresseur s'enclenche lorsque le levier est amené dans sa seconde position et qu'il se déclenche lorsque le levier est amené dans sa première position.According to another embodiment, said lever may include means for cooperating with a switch for switching on and off the compressor, so that this compressor switches on when the lever is brought into its second position and it triggers when the lever is brought into its first position.

Ladite embase comporte avantageusement des moyens d'accrochage agencés pour coopérer avec lesdits moyens d'accrochage dudit levier des moyens de couplage.Said base advantageously comprises latching means arranged to cooperate with said latching means of said lever of the coupling means.

De préférence, ladite embase comporte une gorge annulaire agencée pour coopérer avec lesdits moyens d'accrochage dudit levier des moyens de couplage.Preferably, said base comprises an annular groove arranged to cooperate with said means for attaching said lever to the coupling means.

Selon une forme de réalisation avantageuse, ladite embase est sertie dans une ouverture centrale de l'enceinte, la partie comportant la soupape anti-retour étant disposée à l'intérieur de l'enceinte et la partie comportant ladite gorge annulaire étant disposée à l'extérieur de cette enceinte.According to an advantageous embodiment, said base is crimped into a central opening of the enclosure, the part comprising the non-return valve being disposed inside the enclosure and the part comprising said annular groove being disposed at the outside of this enclosure.

La présente invention sera mieux comprise en référence à la description d'une forme de réalisation préférée et du dessin annexé, dans lequel :

  • la figure 1 représente une vue en perspective de la combinaison d'une boîte d'aérosol et d'un dispositif de mise sous pression selon l'invention,
  • la figure 2 représente une vue en coupe axiale du dispositif de mise sous pression de la figure 1, la boîte d'aérosol étant retirée,
  • la figure 3 représente une vue partielle du dispositif de mise sous pression de la boîte d'aérosol, au moment où une telle boîte est mise en place sur ce dispositif, et
  • la figure 4 représente une vue similaire à celle de la figure 3, lorsque la boîte d'aérosol est en position sur le dispositif de mise sous pression pour recevoir de l'air sous pression.
The present invention will be better understood with reference to the description of a preferred embodiment and the accompanying drawing, in which:
  • FIG. 1 represents a perspective view of the combination of an aerosol can and a pressurizing device according to the invention,
  • FIG. 2 represents a view in axial section of the pressurizing device of FIG. 1, the aerosol can being removed,
  • FIG. 3 represents a partial view of the device for pressurizing the aerosol can, when such a can is put in place on this device, and
  • Figure 4 shows a view similar to that of Figure 3, when the aerosol can is in position on the pressurizing device to receive pressurized air.

En référence aux figures, le dispositif 10 de mise sous pression d'une boîte d'aérosol 11 comporte principalement un boîtier 12 dont la face supérieure est équipée d'un instrument de mesure 13 qui indique la pression de l'air sous pression qui est injecté par le dispositif 10 dans la boîte d'aérosol 11. La boîte d'aérosol est une boîte tout à fait conventionnelle dans son ensemble, mais dont le fond est équipé, comme cela sera expliqué plus en détail par la suite, de moyens permettant une injection d'air sous pression pouvant être réalisée de différentes manières.With reference to the figures, the device 10 for pressurizing an aerosol can 11 mainly comprises a housing 12, the upper face of which is equipped with a measuring instrument 13 which indicates the pressure of the pressurized air which is injected by the device 10 into the aerosol can 11. The aerosol can is a completely conventional can as a whole, but the bottom of which is equipped, as will be explained in more detail below, means allowing an injection of pressurized air which can be carried out in different ways.

Comme le montre plus particulièrement la figure 2, le boîtier 12 contient une pompe électrique constituant un compresseur d'air 14 constitué d'une part d'un cylindre 15 et d'un moteur d'entraînement 16 et d'autre part d'au moins un piston de compression. Ces compresseurs existent dans le commerce et sont couramment utilisés pour diverses applications telles que par exemple les gonfleurs pour roues d'automobiles, bouées de natation, matelas pneumatiques, bateaux pneumatiques etc., qui sont actuellement alimentés en énergie électrique à travers une prise spéciale pouvant être branchée à un allume-cigare de véhicule automobile. Il est bien entendu que tout autre compresseur miniaturisé peut être utilisé pour constituer une source d'air sous pression, à condition que ce compresseur permettre d'obtenir de l'air comprimé à une pression au moins égale à 8 bars.As shown more particularly in Figure 2, the housing 12 contains an electric pump constituting an air compressor 14 consisting on the one hand of a cylinder 15 and a drive motor 16 and on the other hand of minus a compression piston. These compressors are commercially available and are commonly used for various applications such as, for example, inflators for automobile wheels, swimming buoys, air mattresses, inflatable boats, etc., which are currently supplied with electrical energy through a special outlet which can be connected to a cigarette lighter in a motor vehicle. It is understood that any other miniaturized compressor can be used to constitute a source of pressurized air, provided that this compressor makes it possible to obtain compressed air at a pressure at least equal to 8 bars.

Le boîtier 12 comporte un logement 17 destiné à recevoir l'extrémité arrière de la boîte d'aérosol. Dans le but de permettre l'injection de l'air sous pression généré par le compresseur 14 dans la boîte d'aérosol, le dispositif de mise sous pression 10 est équipé d'un embout de remplissage 18. Des moyens de couplage sous forme d'un levier 19 sont prévus pour assurer le couplage du dispositif de mise sous pression et de la boîte d'aérosol positionnée dans le logement 17.The housing 12 comprises a housing 17 intended to receive the rear end of the aerosol can. In order to allow the injection of the pressurized air generated by the compressor 14 into the aerosol can, the pressurizing device 10 is equipped with a filling nozzle 18. Coupling means in the form of a lever 19 are provided for coupling the pressurizing device and the aerosol can positioned in the housing 17.

Les figures 3 et 4 représentent une première forme de réalisation des moyens de couplage associés à l'embout de remplissage et à la boîte d'aérosol. Le logement 17 définit une plate-forme 20 de forme circulaire dont le diamètre est légèrement supérieur au diamètre du fond 21 de la boîte d'aérosol 11. Au centre de cette plate-forme 20 se trouve l'embout de remplissage 18 qui se présente sous la forme d'une pièce sensiblement cylindrique traversée par un canal axial 22, et dont la surface périphérique est équipée d'un joint d'étanchéité 23 logé dans une gorge annulaire 24. Le canal 22 a pour fonction de véhiculer l'air sous pression généré par le compresseur vers l'extrémité distale 25 de l'embout 18, et finalement vers une enceinte définie à l'intérieur de la boîte d'aérosol 11.Figures 3 and 4 show a first embodiment of the coupling means associated with the filling nozzle and the aerosol can. The housing 17 defines a platform 20 of circular shape whose diameter is slightly greater than the diameter of the bottom 21 of the aerosol can 11. In the center of this platform 20 is the filling nozzle 18 which is in the form of a substantially cylindrical part traversed by an axial channel 22, and the peripheral surface of which is fitted with a seal 23 housed in an annular groove 24. The channel 22 has the function of conveying air under pressure generated by the compressor towards the distal end 25 of the nozzle 18, and finally to an enclosure defined inside the aerosol can 11.

A cet effet, le fond de la boîte d' aérosol est équipée d'une embase 26 pourvue d'une soupape à bille 27 ou de toute autre forme de clapet anti-retour adéquat, et présentant une cavité 28 dont la forme et les dimensions correspondent à celles de l'embout 18 de telle manière que l'embout puisse être engagé d'une manière étanche à l'intérieur de cette cavité 28. Cette embase, de forme générale cylindrique, est engagée dans une ouverture centrale appropriée ménagée dans le fond 21 de la boîte d'aérosol, et est fixée à ce fond au moyen d'une bague de sertissage 29. Une pièce annulaire 30 comportant une gorge annulaire 31 est fixée à la partie extérieure de l'embase 26 et permet d'assurer, avec un levier 32 solidaire du boîtier du dispositif de mise sous pression, le couplage entre ce dispositif et la boîte d'aérosol correspondante. Ce levier 32 comporte à son extrémité supérieure un bec 33 destiné à s'engager dans la gorge annulaire 31 et à constituer avec cette dernière des moyens d' accrochage du levier 32 et de la pièce annulaire 30, en d'autres termes d'assurer le couplage entre la boîte d'aérosol et le dispositif de mise sous pression de cette dernière.For this purpose, the bottom of the aerosol can is equipped with a base 26 provided with a ball valve 27 or any other form of suitable non-return valve, and having a cavity 28 whose shape and dimensions correspond to those of the end piece 18 so that the end piece can be engaged in a sealed manner inside this cavity 28. This base, of generally cylindrical shape, is engaged in an appropriate central opening formed in the bottom 21 of the aerosol can, and is fixed to this bottom by means of a crimping ring 29. An annular part 30 comprising an annular groove 31 is fixed to the external part of the base 26 and makes it possible to ensure , with a lever 32 integral with the housing of the pressurizing device, the coupling between this device and the corresponding aerosol can. This lever 32 has at its upper end a spout 33 intended to engage in the annular groove 31 and to constitute with the latter means for hooking the lever 32 and the annular part 30, in other words ensuring the coupling between the aerosol can and the pressurizing device of the latter.

Le levier 32 est logé dans un évidement incliné 34 ménagé dans le boîtier 12 et contenant un ressort de poussée 35 qui tend à amener ce levier dans sa position haute représentée par la figure 3. Un organe d'arrêt constitué par une goupille 36 permet, en liaison avec un évidement longitudinal 37 de limiter la course de ce levier entre deux positions, une première position haute représentée par la figure 3 et une seconde position basse représentée par la figure 4. Ce levier comporte par ailleurs une encoche d'encliquetage 38 ménagée sur sa face latérale, cette encoche étant agencée pour coopérer avec un cliquet de verrouillage 39 solidaire d'un piston 40 logé dans une cavité. Ce piston 40 délimite une chambre 41 dans laquelle est disposé un ressort de tarage 42 et une deuxième chambre 43 qui communique par un conduit 44 avec le conduit d'amenée 22 de l'air sous pression ménagé dans l'embout 18.The lever 32 is housed in an inclined recess 34 formed in the housing 12 and containing a thrust spring 35 which tends to bring this lever into its high position represented by FIG. 3. A stop member constituted by a pin 36 allows, in conjunction with a longitudinal recess 37 to limit the stroke of this lever between two positions, a first high position represented by FIG. 3 and a second low position represented by FIG. 4. This lever also comprises a snap-in notch 38 formed on its lateral face, this notch being arranged to cooperate with a locking pawl 39 secured to a piston 40 housed in a cavity. This piston 40 delimits a chamber 41 in which a calibration spring 42 is arranged and a second chamber 43 which communicates by a duct 44 with the supply duct 22 of the pressurized air formed in the nozzle 18.

Lorsque la boîte d'aérosol 11 est amenée en position sur l'embout 18, le levier 32 est poussé vers sa position basse. Le bec 33 de ce levier s'engage dans la gorge annulaire 31. Lorsque la position basse est atteinte, le cliquet 39 s'engage dans l'encoche d'encliquetage 38, ce qui a pour effet d'empêcher la remontée du levier 32 sous l'effet de la poussée exercée par le ressort 35. Dans cette position basse, un interrupteur de mise en route du compresseur est automatiquement enclenché, ce qui a pour effet de démarrer la production d'air comprimé qui est injecté à travers l'embout 18, l'embase 26 et la soupape à bille 27 à l'intérieur de l'enceinte ménagée dans la boîte d'aérosol 11. Le ressort de tarage 42 est réglé à une tension prédéterminée, de telle manière que le piston 40 soit soumis à deux forces équilibrées lorsque la pression de l'air comprimé atteint environ 8 bars. A ce moment, l'air comprimé injecté dans l'enceinte de la boîte d'aérosol est également à cette pression. Dès que la pression de l'air comprimé augmente et dépasse ce seuil prédéterminé, le piston 40 est repoussé dans le sens opposé à celui dans lequel tend à le repousser le ressort de tarage 42. Le cliquet 39 se dégage de l'encoche d'encliquetage 38, ce qui libère le levier 32. Sous l'effet du ressort de poussée 35, ce levier se soulève pour revenir dans sa position haute en repoussant en même temps la boîte d'aérosol et en déclenchant l'interrupteur de mise en route du compresseur. Sous l'effet de la pression régnant à l'intérieur de l'enceinte de la boîte d'aérosol, la soupape à bille 27 se ferme, ce qui a pour effet d'emprisonner l'air contenu à l'intérieur de cette boîte.When the aerosol can 11 is brought into position on the nozzle 18, the lever 32 is pushed towards its low position. The spout 33 of this lever engages in the annular groove 31. When the low position is reached, the pawl 39 engages in the latching notch 38, which has the effect of preventing the lever 32 from rising under the effect of the thrust exerted by the spring 35. In this low position, a compressor start switch is automatically engaged, which has the effect of starting the production of compressed air which is injected through the end piece 18, base 26 and ball valve 27 inside the enclosure formed in the aerosol can 11. The calibration spring 42 is adjusted to a predetermined tension, so that the piston 40 is subjected to two balanced forces when the pressure of the compressed air reaches approximately 8 bars. At this time, the compressed air injected into the enclosure of the aerosol can is also at this pressure. As soon as the pressure of the compressed air increases and exceeds this predetermined threshold, the piston 40 is pushed back in the opposite direction to that in which the calibration spring 42 tends to push it back. The pawl 39 emerges from the notch latching 38, which releases the lever 32. Under the effect of the thrust spring 35, this lever is raised to return to its high position by pushing the aerosol can at the same time and by triggering the start-up switch compressor. Under the effect of the pressure prevailing inside the enclosure of the aerosol can, the ball valve 27 closes, which has the effect of trapping the air contained inside this can. .

Au cas où la boîte d'aérosol est bloquée en position de remplissage, parce que le mécanisme de verrouillage et notamment le levier 32 ne peut pas se libérer, une sécurité est prévue pour empêcher une surpression dangereuse dans la boîte. A cet effet, une gorge axiale 45 est ménagée dans la chambre 41 pour assurer l'échappement libre de l'air si le piston 40 recule au-delà d'une certaine course prédéterminée. Cette sécurité est également efficace si, pour une raison quelconque, le compresseur ne se déclenche pas lorsque la pression maximale est atteinte.In the case where the aerosol can is blocked in the filling position, because the locking mechanism and in particular the lever 32 cannot be released, a safety device is provided to prevent dangerous overpressure in the can. To this end, an axial groove 45 is provided in the chamber 41 to ensure the free escape of air if the piston 40 moves back beyond a certain predetermined stroke. This safety is also effective if, for any reason, the compressor does not start when the maximum pressure is reached.

Afin d'éviter que la boîte reste bloquée parce qu'une coupure de courant a lieu pendant son remplissage, le piston 40 est rendu solidaire d'une plaquette 46 au moyen d'une vis 47. Cette plaquette 46 présente une encoche 48 située en regard d'un évidement d'accès 49 ménagé dans la base du boîtier. En cas de panne de courant ou de panne du moteur l'utilisateur peut alors repousser manuellement la plaquette 46, au moyen d'un outil approprié tel qu'un tournevis, pour amener le piston et le cliquet dans leur position retirée qui permet la libération du levier 32 et le dégagement de la boîte d'aérosol.In order to avoid that the box remains blocked because a power cut occurs during its filling, the piston 40 is made integral with a plate 46 by means of a screw 47. This plate 46 has a notch 48 located in look of an access recess 49 formed in the base of the housing. In the event of a power failure or an engine failure, the user can then manually push the plate 46, using a suitable tool such as a screwdriver, to bring the piston and the pawl into their withdrawn position which allows the release. lever 32 and release of the aerosol can.

Cette réalisation présente l'avantage de permettre l'utilisation de l'air comprimé comme gaz propulseur des substances à pulvériser sous forme d'aérosol. De ce fait, les problèmes d'écologie et économiques précédemment évoqués sont résolus d'une manière simple et efficace.This embodiment has the advantage of allowing the use of compressed air as a propellant for the substances to be sprayed in the form of an aerosol. As a result, the ecological and economic problems mentioned above are resolved in a simple and effective manner.

Claims (11)

  1. Combination of an aerosol can (11) with a pressurizing device (10), this can comprising an enclosed area containing said aerosol and air, this area being equipped with a spray device at its upper end, a base (26) designed to hold a fill nozzle (18) of the pressurizing device, said base being provided with a flow control valve (27) for the pressurized air contained in said can, the pressurizing device comprising a housing (12) comprising a seating (17) designed to receive an aerosol can (11) and containing an electric pump forming an air compressor (14), activation and deactivation means (39, 40) of this air compressor, and connection means (32) for temporarily connecting the aerosol can to said compressor, characterized in that said base and the device comprise locking means (30, 31; 32, 33) to maintain the aerosol can in said seating (17) on the housing, and in that these connection means consist of means (39, 40) to activate the compressor when the aerosol can (11) is positioned in said seating (17), and to deactivate it when air pressure inside the can (11) reaches a predetermined level.
  2. Combination according to claim 1, characterized in that said locking means of the device comprises a lever (32) provided with attachment means for the aerosol can.
  3. Combination according to claim 2, characterized in that said lever (32) is housed in an inclined groove (34) formed in said housing (12), which also contains a pressure spring (35) tending to force the lever to a first upper position, defined by a stop means (36) which limits displacement of the lever.
  4. Combination according to claim 3, characterized in that said lever (32) comprises a notch for a click stop (38) formed on its lateral surface, said notch being designed to cooperate with a click stop (39) locking said lever in a second lowered position in which the pressure spring (35) is compressed.
  5. Combination according to claim 4, characterized in that said click stop (39) is connected to a piston (40), one surface of which is subjected to pressure from an equalizing spring (42) and the other surface of which is subjected to the pressure of the compressed air contained in the aerosol can.
  6. Combination according to claim 5, characterized in that said piston (40) is housed in an opening formed in the housing and divides said opening into two chambers (41, 43), one (41) of which contains said equalizing spring (42) and the other (43) of which communicates with the aerosol can.
  7. Combination according to claim 6, characterized in that the chamber (41) containing the equalizing spring (42) has an axial groove (45) designed to allow the gas to escape freely when piston displacement surpasses a predetermined point.
  8. Combination according to claim 2, characterized in that said lever (32) comprises a means for cooperating with a switch which activates and deactivates the compressor, so that this compressor is activated when the lever (32) moves to its second position and is deactivated when the lever moves to its first position.
  9. Combination according to claim 1, characterized in that said base (26) comprises attachment means designed to cooperate with said attachment means on said lever (32) of the connection means.
  10. Combination according to claim 9, characterized in that said base (26) comprises an annular groove (31) designed to cooperate with said attachment means on said lever (32) of the connection means.
  11. Combination according to claim 9, characterized in that said base (26) is locked inside a central opening in the enclosed area, with the portion comprising the fluid control valve being disposed inside the enclosed area and the portion comprising said annular groove being disposed outside said area.
EP92918290A 1991-09-09 1992-09-09 Combination of an aerosol can with a can pressurizing device Expired - Lifetime EP0555447B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9111137 1991-09-09
FR9111137A FR2681043B1 (en) 1991-09-09 1991-09-09 DEVICE FOR PRESSURIZING AN AEROSOL CAN AND AN AEROSOL CAN ADAPTED TO THIS DEVICE.
PCT/CH1992/000185 WO1993004928A1 (en) 1991-09-09 1992-09-09 Aerosol can pressurizing device and aerosol can therefor

Publications (2)

Publication Number Publication Date
EP0555447A1 EP0555447A1 (en) 1993-08-18
EP0555447B1 true EP0555447B1 (en) 1995-12-06

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EP92918290A Expired - Lifetime EP0555447B1 (en) 1991-09-09 1992-09-09 Combination of an aerosol can with a can pressurizing device

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US (1) US5343904A (en)
EP (1) EP0555447B1 (en)
JP (1) JPH06501670A (en)
AT (1) ATE131123T1 (en)
CA (1) CA2095844C (en)
DE (1) DE69206591T2 (en)
DK (1) DK0555447T3 (en)
ES (1) ES2082496T3 (en)
FR (1) FR2681043B1 (en)
WO (1) WO1993004928A1 (en)

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Publication number Publication date
ATE131123T1 (en) 1995-12-15
EP0555447A1 (en) 1993-08-18
DE69206591D1 (en) 1996-01-18
WO1993004928A1 (en) 1993-03-18
FR2681043A1 (en) 1993-03-12
DE69206591T2 (en) 1996-07-25
FR2681043B1 (en) 1995-06-23
CA2095844C (en) 1997-01-14
DK0555447T3 (en) 1996-04-09
US5343904A (en) 1994-09-06
ES2082496T3 (en) 1996-03-16
JPH06501670A (en) 1994-02-24

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