EP0598041A1 - Valve for a pressurized container such as an aerosol can, and pressurized container provided therewith. - Google Patents

Valve for a pressurized container such as an aerosol can, and pressurized container provided therewith.

Info

Publication number
EP0598041A1
EP0598041A1 EP92917880A EP92917880A EP0598041A1 EP 0598041 A1 EP0598041 A1 EP 0598041A1 EP 92917880 A EP92917880 A EP 92917880A EP 92917880 A EP92917880 A EP 92917880A EP 0598041 A1 EP0598041 A1 EP 0598041A1
Authority
EP
European Patent Office
Prior art keywords
valve
container
orifice
micro
valve body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP92917880A
Other languages
German (de)
French (fr)
Other versions
EP0598041B1 (en
Inventor
Jean-Pierre Yquel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LOreal SA
Original Assignee
LOreal SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LOreal SA filed Critical LOreal SA
Publication of EP0598041A1 publication Critical patent/EP0598041A1/en
Application granted granted Critical
Publication of EP0598041B1 publication Critical patent/EP0598041B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B65D83/32—Dip-tubes
    • 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

Definitions

  • the invention relates to a valve for a pressurized container, or aerosol can, of the type which includes a valve body intended to be fixed in a cup mounted on the can, a valve stem movable axially in the valve body, and elastic return means for rapping the valve stem into a closed position, while the opening of the valve is obtained by a pressing action on the stem, said valve being combined with a valve sensitive to the action of gravity capable of closing the outlet of the valve when the container occupies a position spaced apart, beyond a predetermined limit, from its normal position of use.
  • the container is intended to be used either upside down, or upside down, with its substantially vertical axis.
  • the aforementioned valve intervenes to close the outlet of the valve if the axis of the container is too far from the vertical and / or if the head of the container does not occupy the normal position.
  • FR-A-2 375 111 shows a valve of this type, in particular in FIG. 5 where the valve sensitive to the action of gravity comprises a ball forming a shutter member.
  • the valve sensitive to the action of gravity comprises a ball forming a shutter member.
  • the ball comes to rest against a seat and closes the passage to the rod, so that the dispensing of the aerosol composition is stopped.
  • the orifice des ⁇ tined to be closed by the ball of the valve has a relatively small diameter creating a significant additional pressure drop, in normal operation.
  • the invention aims, above all, to make the valve of the kind defined above such that the presence of the valve sensitive to the action of gravity does not introduce any significant additional pressure drop for the flow of the fluid in normal operation.
  • the invention also aims to provide a valve whose valve reacts quickly to a wrong position given to the container. This is particularly advantageous in the case of containers pressurized with a compressed gas, in particular compressed air, which should be saved to avoid too frequent inflation of the container; in fact, during a bad position given to the container, the spraying is not satisfactory and there is a significant loss of the propellant.
  • a valve for a pressurized container, or aerosol can of the kind defined above, is characterized in that a micro-orifice is provided in the wall of the valve body to establish, when the valve is in the position of closure, a communication between the interior volume under pressure of the container, and the zone of the valve situated downstream of the valve closure member in the closed position, in order to balance the pressures on both sides other of this shutter member and to facilitate its return to the open position under the action of gravity.
  • the force corresponding to the product of the section of the valve seat by the internal pressure of the container can be greater than the weight of the closure member, this force being counterbalanced by an opposite force obtained thanks to the micro-leakage created by the micro-orifice.
  • the closure member can be placed in the dip tube which is closed axially at its lower end and is provided with at least one inlet offset radially with respect to the axis of the tube, the seat of the shutter member, in particular consisting of a ball, being provided at the end of the valve stem on which the dip tube is engaged.
  • the closure member can be placed in a lower appen ⁇ dice of the valve body.
  • the dip tube can open laterally into this appendage, the seat of the closure member being located at a reduced distance from the bottom of this appendage.
  • the valve In the case of a valve for a container intended to be used upside down, the valve has on its body a lateral extension with a gas inlet in the upper part and a seat in the lower part, the shutter member being able to move around in this lateral extension.
  • the micro-orifice is advantageously produced in the form of a notch of reduced dimensions provided on an edge of the valve body intended to come into abutment against a sealing washer urged by the valve stem.
  • the valve may comprise a micro-orifice for the passage of gas provided in the valve body and a cap turning its concavity in the opposite direction to the valve body, capable of moving in sliding in this valve body, cap which constitutes the stem of the valve.
  • this cap having at its bottom at least one passage hole and on its periphery two circular sealing rods spaced axially and arranged so that in normal operation, cap pressed, the passage micro-orifice is trapped between the two rods, while in normal position, valve in closed position, the aforesaid micro-orifice establishes a passage between the interior of the valve body and the container.
  • the closure member in particular a ball, is retained in a housing provided in the valve stem.
  • the invention also relates to a pressurized container, or aerosol can, equipped with a valve as defined above.
  • FIG. 1 of these drawings shows, atically dried in section, a pressurized container and a valve, with dip tube, according to the invention, a detail being shown on a larger scale.
  • Figure 2 shows 1 , on a smaller scale, the container of Figure 1 upside down, that is to say in the wrong position, its operation being made impossible.
  • FIG. 3 illustrates an alternative embodiment of the valve! With a rapid shutter system.
  • Figure 4 is another variant of the rapid shutter system.
  • Figures 5 to 7 show, respectively, head up, head down, and back to the head-up position, a valve according to another alternative embodiment.
  • FIG. 8 illustrates a valve according to the invention intended for head-down operation, and which is in the blocking position according to this FIG. 8.
  • FIG. 9 finally, illustrates the valve of Figure 8 in its normal operating position upside down.
  • pressurized container of aerosol can 1 type containing a liquid 2 to be sprayed and a propellant 3 preferably consisting of an inert gas, in particular compressed air, or alternatively a propellant or a mixture of liquefied gases.
  • a propellant 3 preferably consisting of an inert gas, in particular compressed air, or alternatively a propellant or a mixture of liquefied gases.
  • the container 1 has an opening 4 on which a cup 5 is crimped.
  • a distribution valve 6 is fixed, generally by crimping, to the center of the cup 5.
  • the valve 6 comprises a valve body 7 provided at its end attached to the cup, an i8 peripheral bulge or valve shell.
  • the edge of this bulge 8, remote from the bottom of the container 1, is provided with a peripheral rib 9 with a triangular cross section, determining an edge against which a sealing washer 10 is pressed, for example made of elastomeric material.
  • the crimping of the central part of the cup 5 on the bulge 8 keeps the outer edge of the washer 10 tight against the edge of the rib 9 so as to provide a seal at this level.
  • valve 7 At its end opposite to the rib 9, the body of valve 7 is extended by a tube 11, of reduced diameter, forming a valve stem.
  • a valve stem 12 is mounted to move axially in the body 7, this stem being extended by a portion 13 of smaller diameter projecting outside.
  • An axial channel 14 is provided in part 13 and opens at the free front end. This channel 14 communicates, at its other end, with a radial channel 15 opening laterally into a peripheral groove 16 provided at the junction of the extension 13 and the part of larger diameter of the rod 12 located in the body 7.
  • the edge 17 of the central hole of the washer 10 has a diameter slightly less than the diameter of the groove 16 and squeezes the bottom of the groove by forming, when the rod 12 is not pressed, a sort of lip curved towards the outside so as to ensure the sealed closure of the inlet of the channel 15, with respect to the interior volume of the body 7.
  • the rod 12 is held in the rest or closed position, represented in FIG. 1, by a spring return 18 provided between a shoulder of the body 7 and the rod 12.
  • a sufficient radial space is provided between the external surface of the rod 12 and the internal surface of the body 11 to allow free passage of the fluids.
  • valve 6 The user can cause the valve 6 to open by acting on a push button (not shown), provided with a spray nozzle communicating with the channel 14, so as to push the rod 12 against of the force of the spring 18.
  • a push button (not shown), provided with a spray nozzle communicating with the channel 14, so as to push the rod 12 against of the force of the spring 18.
  • This action allows the radial channel 15 to communicate with the internal volume of the body 7, the sealing washer 10 deforming at its internal edge to allow this communication while maintaining a seal around the base of extension 13, vis-à-vis the outside.
  • the container 1 shown in FIG. 1 is intended to be used head up and a dip tube 19 is engaged around the tube 11, this tube extending to the bottom of the container.
  • the valve 12 is combined with a valve C sensitive to the action of gravity and is suitable for closing the outlet of the valve when the container 1 occupies, as illustrated in FIG. 2, a position, upside down, which is not not the normal position of use.
  • the valve C comprises a seat 120 constituted by the end of the tube 11 remote from the body 7 and a shutter member constituted by a ball 21, movable under the action of gravity, and suitable for being applied in a sealed manner against the seat 20, so as to close the tube 11 and prevent any sor ⁇ tie of product by the valve stem 12.
  • the ball 21 is placed in the dip tube 19 which is closed axially at its lower end by a bottom 22.
  • the tube 19 is provided with a lateral inlet 23 provided near the bottom 22.
  • the inlet 23 is provided in the cylindrical wall.
  • one or more inlets 23, for example constituted by holes, could be provided in the bottom 22, in being offset radially from the axis of the tube 19.
  • a micro-orifice F is provided in the wall of the valve body 7 to establish communication between the interior pressurized volume of the container 1 and the zone of the valve located downstream of the ball 21 in the closed position. This micro-orifice is closed by the washer 10 when the valve stem 12 is pressed. As visible in detail A in FIG. 1, the micro-orifice F is constituted by a notch 24 of reduced size, in particular from the angular extended point of view, provided in the edge of the peripheral rib 9. When the valve 12 occupies the rest or closed position shown in FIG.
  • the mean plane of the washer 10 is substantially orthogonal to the axis of the valve, so that a micro-leak is created by the notch 24, below the washer 10 between the interior volume of the container 1 and the interior volume of the valve body 7.
  • the washer 10 deforms, its inner edge being pushed towards the bottom of body 7, while its outer edge is maintained by crimping; the inner face of the washer 10 therefore takes a concave shape and closes the notch 24, so as to cut the micro-leak when the rod 12 is pressed and therefore when the valve 6 is open.
  • the operation of the aerosol can 1 of FIG. 1 is as follows.
  • this container When this container is held in the normal posi ⁇ tion, head up with its substantially vertical axis, the user can, by pressing the push button not shown, push the valve stem 12 and cause the spraying of the liquid 2.
  • the ball 21 remains against the bottom 22 of the tube 19.
  • the ball 21 is applied against the seat 20. If the user pushes the rod 12, the interior space of the body 7 is placed in communication with the atmosphere by the channels 15 and 14. The ball 21 is applied firmly by the pressure prevailing in the container 1 con ⁇ the seat 20 and opposes any fluid outlet through the channels 15 and 14. In addition, the micro-orifice formed by the notch 24 is closed when the rod 12 is pressed so that there is no passage of fluid from the container 1 towards the interior of the body 7 through this micro-orifice.
  • the notch 24 opens again and allows the entry of gas under pressure inside the body 7 so as to balance the pressures on the part and d other of the ball 21 bearing against the seat 20.
  • FIG. 1 illustrates an alternative embodiment of the container of Figure 1 according to which the ball 21 of the valve C is located in the axial proximity of its seat 120 so that the closure of the valve is faster than in the case of Figure 1 since the path to be taken by the ball 21 is reduced.
  • the tubing 111 in FIG. 3, is closed by a bottom 122 against which the ball 21 rests, when the container is in its normal position.
  • the seat 120 is constituted by a frustoconical shoulder provided axially in the vicinity of the connection of the tube 111 and of the body 7.
  • the dip tube 119 is connected to a lateral oblique nozzle 25 opening into the tube 111 upstream of the seat 120 so that, when the ball 21 is sealingly pressed against the seat 120, the tube 119 no longer communicates with the internal volume of the body 7.
  • the normal position of use of the container of FIG. 3 is also head up. The operation is similar to that of FIG. 1, but the shutter is obtained more quickly in the event of the wrong position of the container for spraying.
  • FIG. 4 illustrates another alternative embodiment of a valve according to the invention for aerosol canisters with normal head-up operation.
  • the tubing 211 of reduced axial length is provided with a bottom 222 against which the ball 21 rests when the container occupies its normal position.
  • This bottom 222 is crossed by passages 26 parallel to the axis of the pipe 211 but spaced radially from this axis so that their extensions are beyond, in the transverse direction, of the contour of the ball 21 when it is in abutment against the center of the bottom 222.
  • These passages 26 allow the fluid from the container to flow.
  • the dip tube comes to cap axially the pipe 211.
  • a micro-orifice is provided as in the case of Figures 1 and 3 on the flange of the valve body.
  • FIGS. 5 to 7 illustrate another vari ⁇ ante embodiment of a valve according to the invention for a container intended to be used head up.
  • the elements of FIGS. 5 to 7 identical or similar to elements already described with respect to FIG.
  • the valve 306 comprises, instead of a valve stem, a cap 312 turning its concavity in the opposite direction to the valve body 307.
  • the extension 313 of reduced diameter, projecting outwards, is integral with the bottom of the cap 312 and coaxial with the latter.
  • This extension 313 comprises an axial channel 314 which, in the vicinity of the bottom of the cap 312, communicates with a radial hole 315 passing through the wall of the extension 313.
  • the cap 312 has on its cylindrical outer surface two circular rods 27, 28 axially spaced and located towards the end of the cap remote from the extension 313. These rods 27, 28 are provided to slide in leaktight manner against the internal surface of the body 307 .
  • the wall of the cap 312 is crossed radially, near its bottom, that is to say near the base of the extension 313, by holes 29 distributed regularly over the entire periphery.
  • a micro-orifice F constituted by a hole 30 of reduced diameter is provided in the wall of the valve body 307 in a place such that, when the cover 312 occupies the rest position (see FIG. 7), this hole 29 puts in place communication inside the valve body 307 and the cap 312 with the container 1, the sealing ring 28 being located, in the axial direction, on the side of the hole 30 opposite the pipe 11.
  • the extension 313 is pressed in with the cap 312, as shown in FIG. 5, to ensure the opening of the valve, the hole 30 opens into the closed annular space comprised between the two sealing rods 27, 28.
  • the internal volume of the valve body 307 is at atmospheric pressure due to the communication established by the passage 315 when the valve is in the open position, the cap 312 being pushed in.
  • the sealing rings 27 and 28 oppose the admission of fluid, in particular liquid, to the pressure of the container 1, into the valve body 307, through the hole 30, as long as the valve cover is pressed, that is, as long as the valve 306 is kept open.
  • this valve 306 returns to its closed position, as illustrated in FIG. 7, the hole 30 establishes communication between the interior of the container 1 and the interior of the valve body 307, which restores the balance of pressure on either side of the ball 21.
  • FIG. 8 and 9 illustrate a variant valve according to the invention for a container des ⁇ tiné to be used upside down.
  • the valve 406 has, on its body 407, a lateral extension 31 extending parallel to the axis of the body 407 between the bottom of this body and an area located closer to the cup 5.
  • the extension 31 communicates, at its end remote from the cup, with the bottom of the body 407 by a tube 411 oriented radially.
  • the ball 21 is arranged in the lateral extension 31.
  • a seat 420 for this ball is provided in the vicinity of the connection of the extension 31 and the pipe 411, that is to say in the lower part of the extension 31 when the container is head up as shown in FIG. 8.
  • a gas inlet 32 is provided in the wall of the extension 31, on the side of the cup 5 relative to the seat 420, that is to say in the upper part in the position of FIG. 8.
  • the opening 32 ensures the admission of gas under pressure on the side of the ball opposite to the seat.
  • valve of FIGS. 8 and 9 are similar or identical to those of the valve of FIG. 1 and are designated by the same numerical references possibly added to the number 400. Their description will not be repeated.
  • micro-orifice F is constituted by a notch 24 in the peripheral rib 9 of the valve body.
  • valve stem 12 If the valve stem 12 is depressed, as illustrated in FIG. 8, there is no spraying due to the obturation created by the ball 21. If, after having depressed the valve stem 12 while the container is occupying a bad position, the user releases this valve, the inside of the valve body 407 is at atmospheric pressure so that the pressure difference between the inside of the container and the inside of the valve body 407 helps to maintain the ball 21 against its seat.
  • the micro-orifice F constituted by the notch 24 is no longer closed by the sealing washer 10, and a communication is established between the interior of the body 407 and the interior of the container, which allows a balancing of the pressures on either side of the ball 21.
  • the latter can then resume the position of FIG. 9 as soon as the container is placed in the correct position, upside down, without have to overcome a force created by a difference in pressure.
  • the valve according to the invention allows a saving of the propellant by reacting quickly and preventing any outflow of fluid when the container occupies a bad position.
  • the return of the valve to the normal operating position is reliable and rapid thanks to the pressure balancing carried out on either side of the ball 21.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Nozzles (AREA)

Abstract

La valve (6) comprend un corps de valve (7) destiné à être fixé dans une coupelle (5) montée sur le bidon (1), une tige de valve (12) mobile axialement dans le corps de valve, et des moyens de rappel élastiques (18) pour rappeler la tige de valve en une position de fermeture. La valve (6) est combinée avec un clapet (C) sensible à l'action de la pesanteur propre à fermer la sortie de la valve (6) lorsque le récipient occupe une position écartée de sa position normale d'utilisation. Un micro-orifice (F) est prévu dans la paroi du corps de valve (7) pour établir une communication entre le volume intérieur sous pression du récipient (1) et la zone de la valve (6) située en aval de l'organe d'obturation (21) du clapet (C) en position fermée, afin d'équilibrer les pressions de part et d'autre de cet organe d'obturation (21).The valve (6) comprises a valve body (7) intended to be fixed in a cup (5) mounted on the container (1), a valve stem (12) movable axially in the valve body, and means of elastic return (18) to return the valve stem to a closed position. The valve (6) is combined with a valve (C) sensitive to the action of gravity suitable for closing the outlet of the valve (6) when the container occupies a position away from its normal position of use. A micro-orifice (F) is provided in the wall of the valve body (7) to establish communication between the pressurized internal volume of the container (1) and the zone of the valve (6) located downstream of the member. closure (21) of the valve (C) in the closed position, in order to balance the pressures on either side of this closure member (21).

Description

VALVE POUR RECIPIENT PRESSURISE DU TYPE BIDON AEROSOL, ET RECIPIENT PRESSURISE EQUIPE D'UNE TELLE VALVE. VALVE FOR A PRESSURIZED CONTAINER OF THE AEROSOL CONTAINER TYPE, AND PRESSURIZED CONTAINER PROVIDED WITH SUCH A VALVE.
L'invention est relative à une valve pour récipient pressurisé, ou bidon aérosol, du genre de celles qui comprennent un corps de valve destiné à être fixé dans une coupelle montée sur le bidon, une tige de valve mobile axialement dans le corps de valve, et des moyens de rappel élastiques pour rap¬ peler la tige de valve en une position de fermeture, tandis que l'ouverture de la valve est obtenue par une action d'enfoncement sur la tige, ladite valve étant combinée avec un clapet sensible à l'action de la pesanteur propre à fermer la sortie de la valve lorsque le récipient occupe une position écartée, au- delà d'une limite prédéterminée, de sa position nor¬ male d'utilisation.The invention relates to a valve for a pressurized container, or aerosol can, of the type which includes a valve body intended to be fixed in a cup mounted on the can, a valve stem movable axially in the valve body, and elastic return means for rapping the valve stem into a closed position, while the opening of the valve is obtained by a pressing action on the stem, said valve being combined with a valve sensitive to the action of gravity capable of closing the outlet of the valve when the container occupies a position spaced apart, beyond a predetermined limit, from its normal position of use.
D'une manière générale, le récipient est destiné à être utilisé soit tête en haut, ou soit tête en bas, avec son axe sensiblement vertical. Le susdit clapet intervient pour fermer la sortie de la valve si l'axe du récipient est trop écarté de la verticale et/ou si la tête du récipient n'occupe pas la position normale.In general, the container is intended to be used either upside down, or upside down, with its substantially vertical axis. The aforementioned valve intervenes to close the outlet of the valve if the axis of the container is too far from the vertical and / or if the head of the container does not occupy the normal position.
FR-A-2 375 111 montre une valve de ce type, notamment à la figure 5 où le clapet sensible à l'action de la pesanteur comprend une bille formant organe d'obturation. Lorsque le récipient est retourné, la bille vient s'appliquer contre un siège et ferme le passage vers la tige, si bien que la dis- tribution de la composition pour aérosol est arrêtée. Selon ce document antérieur, l'orifice des¬ tiné à être fermé par la bille du clapet a un diamètre relativement réduit créant une perte de charge supplémentaire non négligeable, en fonctionnement nor- mal.FR-A-2 375 111 shows a valve of this type, in particular in FIG. 5 where the valve sensitive to the action of gravity comprises a ball forming a shutter member. When the container is inverted, the ball comes to rest against a seat and closes the passage to the rod, so that the dispensing of the aerosol composition is stopped. According to this prior document, the orifice des¬ tined to be closed by the ball of the valve has a relatively small diameter creating a significant additional pressure drop, in normal operation.
L'invention a pour but, surtout, de rendre la valve du genre défini précédemment telle que la présence du clapet sensible à l'action de la pesanteur n'introduise pas de perte de charge supplémentaire sensible pour l'écoulement du fluide en fonctionnement normal.The invention aims, above all, to make the valve of the kind defined above such that the presence of the valve sensitive to the action of gravity does not introduce any significant additional pressure drop for the flow of the fluid in normal operation.
L'invention a également pour but de fournir une valve dont le clapet réagit rapidement à une mau¬ vaise position donnée au récipient. Ceci est particulièrement intéressant dans le cas de récipients mis sous pression à l'aide d'un gaz comprimé, notam¬ ment d'air comprimé, qu'il convient d'économiser pour éviter des gonflages trop fréquents du récipient ; en effet, lors d'une mauvaise position donnée au récipient, la pulvérisation n'est pas satisfaisante et il y a une perte importante du gaz propulseur.The invention also aims to provide a valve whose valve reacts quickly to a wrong position given to the container. This is particularly advantageous in the case of containers pressurized with a compressed gas, in particular compressed air, which should be saved to avoid too frequent inflation of the container; in fact, during a bad position given to the container, the spraying is not satisfactory and there is a significant loss of the propellant.
Il convient également que le retour du cla¬ pet en position ouverte soit fiable, lorsque le récipient revient d'une mauvaise position à une bonne position. II est souhaitable en outre qu'une telle valve soit d'un prix de revient modéré vis-à-vis d'une valve classique.It is also advisable for the return of the cla¬ pet to the open position to be reliable, when the container returns from a bad position to a good position. It is further desirable that such a valve be of moderate cost vis-à-vis a conventional valve.
Selon l'invention, une valve pour récipient pressurisé, ou bidon aérosol, du genre défini précédemment, est caractérisée par le fait qu'un micro-orifice est prévu dans la paroi du corps de valve pour établir, lorsque la valve est en position de fermeture, une communication entre le volume intérieur sous pression du récipient, et la zone de la valve située en aval de l'organe d'obturation du cla¬ pet en position fermée, afin d'équilibrer les pres¬ sions de part et d'autre de cet organe d'obturation et de faciliter son retour en position ouverte sous l'action de la pesanteur. II est possible ainsi, d'une part, de donner à l'orifice, destiné à être fermé par l'organe d'obturation, un diamètre relativement important sans avoir à craindre que l'organe d'obturation soit empêché de revenir à sa position d'ouverture par suite de la force due aux différences de pression qui aparaissent de part et d'autre de cet organe d'obturation lorsqu'il prend la position fermée. La masse de cet organe d'obturation peut être diminuée, ce qui réduit l'inertie à la fermeture.According to the invention, a valve for a pressurized container, or aerosol can, of the kind defined above, is characterized in that a micro-orifice is provided in the wall of the valve body to establish, when the valve is in the position of closure, a communication between the interior volume under pressure of the container, and the zone of the valve situated downstream of the valve closure member in the closed position, in order to balance the pressures on both sides other of this shutter member and to facilitate its return to the open position under the action of gravity. It is thus possible, on the one hand, to give to the orifice, intended to be closed by the member shutter, a relatively large diameter without having to fear that the shutter member will be prevented from returning to its open position due to the force due to the pressure differences which appear on either side of this member shutter when it takes the closed position. The mass of this shutter member can be reduced, which reduces the inertia on closing.
La force correspondant au produit de la sec- tion du siège du clapet par la pression interne du récipient peut être supérieure au poids de l'organe d'obturation, cette force étant contrebalancée par une force opposée obtenue grâce à la micro-fuite créée par le micro-orifice. Lorsque la valve est associée à un tube plongeur s'étendant à partir du corps de valve jusqu'au fond du récipient, lequel est destiné à être utilisé tête en haut, l'organe d'obturation peut être disposé dans le tube plongeur qui est fermé axialement à son extrémité inférieure et est muni d'au moins une entrée décalée radialement par rapport à l'axe du tube, le siège de l'organe d'obturation, en particu¬ lier constitué par une bille, étant prévu à l'extrémité de la queue de valve sur laquelle est engagé le tube plongeur.The force corresponding to the product of the section of the valve seat by the internal pressure of the container can be greater than the weight of the closure member, this force being counterbalanced by an opposite force obtained thanks to the micro-leakage created by the micro-orifice. When the valve is associated with a dip tube extending from the valve body to the bottom of the container, which is intended to be used head up, the closure member can be placed in the dip tube which is closed axially at its lower end and is provided with at least one inlet offset radially with respect to the axis of the tube, the seat of the shutter member, in particular consisting of a ball, being provided at the end of the valve stem on which the dip tube is engaged.
Afin d'assurer une obturation plus rapide, on peut disposer l'organe d'obturation dans un appen¬ dice inférieur du corps de valve. Le tube plongeur peut déboucher latéralement dans cet appendice, le siège de l'organe d'obturation étant situé à une dis¬ tance réduite du fond de cet appendice.In order to ensure faster closure, the closure member can be placed in a lower appen¬ dice of the valve body. The dip tube can open laterally into this appendage, the seat of the closure member being located at a reduced distance from the bottom of this appendage.
Dans le cas d'une valve pour récipient des¬ tiné à être utilisé tête en bas, la valve comporte sur son corps une extension latérale avec une entrée de gaz en partie haute et un siège en partie basse, l'organe d'obturation pouvant se déplacer dans cette extension latérale.In the case of a valve for a container intended to be used upside down, the valve has on its body a lateral extension with a gas inlet in the upper part and a seat in the lower part, the shutter member being able to move around in this lateral extension.
Le micro-orifice est avantageusement réalisé sous forme d'une êchancrure de dimensions réduites prévue sur un bord du corps de valve destiné à venir en appui contre une rondelle d'étanchéité sollicitée par la tige de valve.The micro-orifice is advantageously produced in the form of a notch of reduced dimensions provided on an edge of the valve body intended to come into abutment against a sealing washer urged by the valve stem.
La valve peut comporter un micro-orifice de passage de gaz prévu dans le corps de valve et une coiffe tournant sa concavité en sens inverse du corps de valve, propre à se déplacer en coulissement dans ce corps de valve, coiffe qui constitue la tige de valve, cette coiffe comportant vers son fond au moins un trou de passage et sur sa périphérie deux joncs circulaires d'étanchéité espacés axialement et disposés de manière telle qu'en fonctionnement normal, coiffe enfoncée, le micro-orifice de passage se trouve emprisonné entre les deux joncs, tandis qu'en position normale, valve en position fermée, le susdit micro-orifice établit un passage entre l'intérieur du corps de valve et le récipient.The valve may comprise a micro-orifice for the passage of gas provided in the valve body and a cap turning its concavity in the opposite direction to the valve body, capable of moving in sliding in this valve body, cap which constitutes the stem of the valve. valve, this cap having at its bottom at least one passage hole and on its periphery two circular sealing rods spaced axially and arranged so that in normal operation, cap pressed, the passage micro-orifice is trapped between the two rods, while in normal position, valve in closed position, the aforesaid micro-orifice establishes a passage between the interior of the valve body and the container.
De préférence, l'organe d'obturation, en particulier une bille, est retenu dans un logement prévu dans la queue de valve.Preferably, the closure member, in particular a ball, is retained in a housing provided in the valve stem.
L'invention concerne également un récipient pressurisé, ou bidon aérosol, équipé d'une valve telle que définie précédemment.The invention also relates to a pressurized container, or aerosol can, equipped with a valve as defined above.
L'invention consiste, mises à part les dispositions exposées ci-dessus, en un certain nombre d'autres dispositions dont il sera plus explicitement question ci-après à propos d'exemples de réalisation particuliers décrits avec référence aux dessins ci- annexés, mais qui ne sont nullement limitatifs.The invention consists, apart from the arrangements set out above, of a certain number of other arrangements which will be more explicitly discussed below in connection with particular embodiments described with reference to the attached drawings, but which are in no way limiting.
La figure 1, de ces dessins, représente, sché atiquement en coupe, un récipient pressurisé et une valve, avec tube plongeur, conforme à l'invention, un détail étant montré à plus grande échelle. La figure 2 montre1, à plus petite échelle, le récipient de la figure 1 tête en bas, c'est-à-dire en mauvaise position, son fonctionnement étant rendu impossible. La figure 3 (illustre une variante de réalisation de la valve! avec un système à obturation rapide.Figure 1 of these drawings shows, atically dried in section, a pressurized container and a valve, with dip tube, according to the invention, a detail being shown on a larger scale. Figure 2 shows 1 , on a smaller scale, the container of Figure 1 upside down, that is to say in the wrong position, its operation being made impossible. FIG. 3 (illustrates an alternative embodiment of the valve! With a rapid shutter system.
La figure 4 est une autre variante du système à obturation rapide. Les figures 5 àι 7 représentent, respective¬ ment tête en haut, tête en bas, et retour à la posi¬ tion tête en haut, une valve conforme à une autre variante de réalisation.Figure 4 is another variant of the rapid shutter system. Figures 5 to 7 show, respectively, head up, head down, and back to the head-up position, a valve according to another alternative embodiment.
La figure 8 illustre une valve selon l'invention destinée à un fonctionnement tête en bas, et qui se trouve en position de blocage selon cette figure 8.FIG. 8 illustrates a valve according to the invention intended for head-down operation, and which is in the blocking position according to this FIG. 8.
La figure 9, enfin, illustre la valve de la figure 8 dans sa position normale de fonctionnement tête en bas.Figure 9, finally, illustrates the valve of Figure 8 in its normal operating position upside down.
En se reportantj aux figures 1 et 2 des des¬ sins, on peut voir un. récipient pressurisé du type bidon aérosol 1 contenant un liquide 2 à pulvériser et un agent propulseur 3 constitué de préf'érence par un gaz inerte, notamment de l'air, comprimé .ou bien encore un propulseur ou un mélange de gaz liquéfiés.Referring to Figures 1 and 2 of the drawings, one can see one. pressurized container of aerosol can 1 type containing a liquid 2 to be sprayed and a propellant 3 preferably consisting of an inert gas, in particular compressed air, or alternatively a propellant or a mixture of liquefied gases.
Le bidon 1 comporte une ouverture 4 sur laquelle est sertie une coupelle 5. Une valve de dis¬ tribution 6 est fixée, généralement par sertissage, au centre de la coupelle 5. La valve 6 comprend un corps de valve 7 muni, à son extrémité fixée sur la coupelle, d'un renflement périphérique i8 ou coquille de valve. Le bord de ce renflement 8, éloigné du fond du récipient 1, est muni d'une nervure périphérique 9 à section transversale triangulaire, déterminant une arête contre laquelle est appuyée une rondelle d'étanchéité 10, par exemple en matière éjlastomère. Le sertissage de la partie centrale de la coupelle 5 sur le renflement 8 maintient serré le bord extérieur de la rondelle 10 contre l'arête de la nervure 9 de manière à réaliser une étanchéité à ce niveau. Toutefois, une communication subsiste entre l'intérieur du récipient 1 et la zone annulaire comprise entre la surface extérieure cylindrique du renflement 1 et la surface interne de la zone voisine de la coupelle 5. A son extrémité opposée à la nervure 9, le corps de valve 7 se prolonge par une tubulure 11, de diamètre réduit, formant queue de valve.The container 1 has an opening 4 on which a cup 5 is crimped. A distribution valve 6 is fixed, generally by crimping, to the center of the cup 5. The valve 6 comprises a valve body 7 provided at its end attached to the cup, an i8 peripheral bulge or valve shell. The edge of this bulge 8, remote from the bottom of the container 1, is provided with a peripheral rib 9 with a triangular cross section, determining an edge against which a sealing washer 10 is pressed, for example made of elastomeric material. The crimping of the central part of the cup 5 on the bulge 8 keeps the outer edge of the washer 10 tight against the edge of the rib 9 so as to provide a seal at this level. However, communication remains between the interior of the container 1 and the annular zone comprised between the cylindrical external surface of the bulge 1 and the internal surface of the zone adjacent to the cup 5. At its end opposite to the rib 9, the body of valve 7 is extended by a tube 11, of reduced diameter, forming a valve stem.
Une tige de valve 12 est montée mobile axi- alement dans le corps 7, cette tige se prolongeant par une partie 13 de plus faible diamètre faisant saillie à l'extérieur. Un canal axial 14 est prévu dans la partie 13 et débouche à l'extrémité frontale libre. Ce canal 14 communique, à son autre extrémité, avec un canal radial 15 débouchant latéralement dans une gorge périphérique 16 prévue à la jonction du prolongement 13 et de la partie de plus fort diamètre de la tige 12 située dans le corps 7.A valve stem 12 is mounted to move axially in the body 7, this stem being extended by a portion 13 of smaller diameter projecting outside. An axial channel 14 is provided in part 13 and opens at the free front end. This channel 14 communicates, at its other end, with a radial channel 15 opening laterally into a peripheral groove 16 provided at the junction of the extension 13 and the part of larger diameter of the rod 12 located in the body 7.
La bordure 17 du trou central de la rondelle 10 a un diamètre légèrement inférieur au diamètre de la gorge 16 et vient serrer le fond de la gorge en formant, lorsque la tige 12 n'est pas enfoncée, une sorte de lèvre recourbée vers l'extérieur de manière à assurer la fermeture étanche de l'entrée du canal 15, vis-à-vis du volume intérieur du corps 7. La tige 12 est maintenue dans la position de repos ou fermée, représentée à la figure 1, par un ressort de rappel 18 prévu entre un épaulement du corps 7 et la tige 12. Un espace radial suffisant est prévu entre la surface extérieure de la tige 12 et la surface interne du corps 11 pour permettre un libre passage des fluides. L'utilisateur peut provoquer l'Iouverture de la valve 6 en agissant sur un bouton-poussoir (non représenté), muni d'une buse de pulvérisation communi¬ quant avec le canal 14, de manière à enfoncer la tige 12 à l'encontre de la force du ressort 18. Cetteactionpermet de mettre en communication le canal radial 15 avec le volume intérieur du corps 7, la rondelle d'étanchéité 10 se déformant au niveau de son bord intérieur pour autoriser cette communication tout en maintenant une étanchéité autour de la base du prolongement 13, vis- à-vis de l'extérieur.The edge 17 of the central hole of the washer 10 has a diameter slightly less than the diameter of the groove 16 and squeezes the bottom of the groove by forming, when the rod 12 is not pressed, a sort of lip curved towards the outside so as to ensure the sealed closure of the inlet of the channel 15, with respect to the interior volume of the body 7. The rod 12 is held in the rest or closed position, represented in FIG. 1, by a spring return 18 provided between a shoulder of the body 7 and the rod 12. A sufficient radial space is provided between the external surface of the rod 12 and the internal surface of the body 11 to allow free passage of the fluids. The user can cause the valve 6 to open by acting on a push button (not shown), provided with a spray nozzle communicating with the channel 14, so as to push the rod 12 against of the force of the spring 18. This action allows the radial channel 15 to communicate with the internal volume of the body 7, the sealing washer 10 deforming at its internal edge to allow this communication while maintaining a seal around the base of extension 13, vis-à-vis the outside.
Le bidon 1 représenté sur la figure 1 est destiné à être utilisé tête en haut et un tube plongeur 19 est engagé autour de la tubulure 11, ce tube s'étendant jusqu'au fond du bidon.The container 1 shown in FIG. 1 is intended to be used head up and a dip tube 19 is engaged around the tube 11, this tube extending to the bottom of the container.
La valve 12 est combinée avec lun clapet C sensible à l'action de la pesanteur et prjopre à fermer la sortie de la valve lorsque le récipienit 1 occupe, comme illustré sur la figure 2, une position, tête en bas, qui n'est pas la position normale d'utilisation. Le clapet C comprend un siège 120 constitué par l'extrémité de la tubulure 11 éloignlée du corps 7 et un organe d'obturation constitué par une bille 21, mobile sous l'action de la pesanteur, et propre à s'appliquer de manière étanche contre le siège 20, de manière à fermer la tubulure 11 et empêcher toute sor¬ tie de produit par la tige de valve 12.The valve 12 is combined with a valve C sensitive to the action of gravity and is suitable for closing the outlet of the valve when the container 1 occupies, as illustrated in FIG. 2, a position, upside down, which is not not the normal position of use. The valve C comprises a seat 120 constituted by the end of the tube 11 remote from the body 7 and a shutter member constituted by a ball 21, movable under the action of gravity, and suitable for being applied in a sealed manner against the seat 20, so as to close the tube 11 and prevent any sor¬ tie of product by the valve stem 12.
Selon la réalisation des figures 1 et 2, la bille 21 est disposée dans le tube plongeur 19 qui est fermé axialement à son extrémité inférieure par un fond 22. Le tube 19 est muni d'une entrée latérale 23 prévue à proximité du fond 22.According to the embodiment of FIGS. 1 and 2, the ball 21 is placed in the dip tube 19 which is closed axially at its lower end by a bottom 22. The tube 19 is provided with a lateral inlet 23 provided near the bottom 22.
Dans l'exemple de la figure 1, l'entrée 23 est prévue dans la paroi cylindrique. En variante, une ou plusieurs entrées 23, par exemple constituées par des trous, pourraient être prévues dans le fond 22, en étant décalées radiale ent vis-à-vis de l'axe du tube 19.In the example of Figure 1, the inlet 23 is provided in the cylindrical wall. Alternatively, one or more inlets 23, for example constituted by holes, could be provided in the bottom 22, in being offset radially from the axis of the tube 19.
Un micro-orifice F est prévu dans la paroi du corps de valve 7 pour établir une communication entre le volume intérieur sous pression du récipient 1 et la zone de la valve située en aval de la bille 21 en position fermée. Ce micro-orifice est fermé par la rondelle 10 lorsque la tige de valve 12 est enfoncée. Comme visible sur le détail A de la figure 1, le micro-orifice F est constitué par une échancrure 24 de dimension réduite, en particulier au point de vue étendue angulaire, prévue dans l'arête de la ner¬ vure périphérique 9. Lorsque la valve 12 occupe la position de repos ou de fermeture représentée sur la figure 1, le plan moyen de la rondelle 10 est sensi¬ blement orthogonal à l'axe de la valve, de sorte qu'une micro-fuite est créée, par l'êchancrure 24, au-dessous de la rondelle 10 entre le volume intérieur du récipient 1 et le volume intérieur du corps de valve 7. Par contre, lorsque la tige 12 est enfoncée, la rondelle 10 se déforme, son bord intérieur étant repoussé vers le fond du corps 7, tandis que son bord extérieur est maintenu par le sertissage ; la face interne de la rondelle 10 prend donc une forme concave et vient obturer l'êchancrure 24, de manière à couper la micro-fuite lorsque la tige 12 est enfoncée et donc lorsque la valve 6 est ouverte.A micro-orifice F is provided in the wall of the valve body 7 to establish communication between the interior pressurized volume of the container 1 and the zone of the valve located downstream of the ball 21 in the closed position. This micro-orifice is closed by the washer 10 when the valve stem 12 is pressed. As visible in detail A in FIG. 1, the micro-orifice F is constituted by a notch 24 of reduced size, in particular from the angular extended point of view, provided in the edge of the peripheral rib 9. When the valve 12 occupies the rest or closed position shown in FIG. 1, the mean plane of the washer 10 is substantially orthogonal to the axis of the valve, so that a micro-leak is created by the notch 24, below the washer 10 between the interior volume of the container 1 and the interior volume of the valve body 7. On the other hand, when the rod 12 is pressed, the washer 10 deforms, its inner edge being pushed towards the bottom of body 7, while its outer edge is maintained by crimping; the inner face of the washer 10 therefore takes a concave shape and closes the notch 24, so as to cut the micro-leak when the rod 12 is pressed and therefore when the valve 6 is open.
Ceci étant, le fonctionnement du bidon aérosol 1 de la figure 1 est le suivant. Lorsque ce bidon est maintenu dans la posi¬ tion normale, tête en haut avec son axe sensiblement vertical, l'utilisateur peut, en appuyant sur le bouton-poussoir non représenté, enfoncer la tige de valve 12 et provoquer la pulvérisation du liquide 2. La bille 21 reste contre le fond 22 du tube 19.However, the operation of the aerosol can 1 of FIG. 1 is as follows. When this container is held in the normal posi¬ tion, head up with its substantially vertical axis, the user can, by pressing the push button not shown, push the valve stem 12 and cause the spraying of the liquid 2. The ball 21 remains against the bottom 22 of the tube 19.
Si le bidon 1 est renversé tête en bas , la bille 21 vient s'appliquer contre le siège 20. Si l'utilisateur enfonce la tige 12, l'espace intérieur du corps 7 est mis en communication avec l'atmosphère par les canaux 15 et 14. La bille 21 est appliquée fermement par la pression régnant dans le bidon 1 con¬ tre le siège 20 et s'oppose à toute sortie de fluide par les canaux 15 et 14. En outre, le micro-orifice formé par l'êchancrure 24 se trouve fermé lorsque la tige 12 est enfoncée de telle sorte qu'il n'y a pas de passage de fluide du récipient 1 vers l'intérieur du corps 7 par ce micro-orifice.If container 1 is turned upside down, the ball 21 is applied against the seat 20. If the user pushes the rod 12, the interior space of the body 7 is placed in communication with the atmosphere by the channels 15 and 14. The ball 21 is applied firmly by the pressure prevailing in the container 1 con¬ the seat 20 and opposes any fluid outlet through the channels 15 and 14. In addition, the micro-orifice formed by the notch 24 is closed when the rod 12 is pressed so that there is no passage of fluid from the container 1 towards the interior of the body 7 through this micro-orifice.
Lorsque la valve 12 est relâchée pour revenir dans sa position fermée, l'êchancrure 24 s'ouvre à nouveau et permet l'entrée de gaz sous pres- sion à l'intérieur du corps 7 de manière à équilibrer les pressions de part et d'autre de la bille 21 en appui contre le siège 20.When the valve 12 is released to return to its closed position, the notch 24 opens again and allows the entry of gas under pressure inside the body 7 so as to balance the pressures on the part and d other of the ball 21 bearing against the seat 20.
Si le bidon 1 est retourné de manière à se retrouver tête en haut, la bille 21 quitte son siège 20 pour se diriger vers le fond 22, sous l'action de la pesanteur. Ce mouvement n'est pas empêché par une différence de pression entre l'intérieur du bidon 1 et l'intérieur du corps 7, grâce à la communication établie par l'êchancrure 24. Le siège 20 peut avoir un diamètre important relativement au diamètre de la bille 21 comme illustré sur la figure 1 des dessins, ce qui n'empêche pas le retour de la bille 21 en posi¬ tion d'ouverture dès que le bidon 1 se retrouve tête en haut, avec la valve 6 fermée. La figure 3 illustre une variante de réalisation du récipient de la figure 1 selon laquelle la bille 21 du clapet C est située à proximité axiale de son siège 120 de sorte que la fermeture du clapet soit plus rapide que dans le cas de la figure 1 puisque le trajet à effectuer par la bille 21 est réduit. Les éléments de la variante de la figure 3 identiques ou jouant des rôles analogues à des éléments déjà décrits à propos de la figure 1 sont désignés par les mêmes références numériques ou, éven- tuellement, par une référence numérique égale .à la somme du nombre 100 et de la référence utilisée sur la figure 1. La description de ces éléments n'est pas reprise ou n'est effectuée que succinctement.If the container 1 is turned over so as to end up head up, the ball 21 leaves its seat 20 to move towards the bottom 22, under the action of gravity. This movement is not prevented by a pressure difference between the inside of the can 1 and the inside of the body 7, thanks to the communication established by the notch 24. The seat 20 may have a large diameter relative to the diameter of the ball 21 as illustrated in Figure 1 of the drawings, which does not prevent the return of the ball 21 in the open position as soon as the container 1 is found head up, with the valve 6 closed. Figure 3 illustrates an alternative embodiment of the container of Figure 1 according to which the ball 21 of the valve C is located in the axial proximity of its seat 120 so that the closure of the valve is faster than in the case of Figure 1 since the path to be taken by the ball 21 is reduced. The elements of the variant of FIG. 3 which are identical or play roles analogous to elements already described in connection with FIG. 1 are designated by the same reference numbers or, where appropriate, by a reference number equal to the sum of the number 100 and the reference used in FIG. 1. The description of these elements is not repeated or is made only succinctly.
La tubulure 111, sur la figure 3, est fermée par un fond 122 contre lequel repose la bille 21, lorsque le bidon est dans sa position normale. Le siège 120 est constitué par un épaulement tronconique prévu axialement au voisinage du raccordement de la tubulure 111 et du corps 7. Le tube plongeur 119 est raccordé à un ajutage oblique latéral 25 débouchant dans la tubulure 111 en amont du siège 120 de sorte que, lorsque la bille 21 est en appui étanche contre le siège 120, le tube 119 ne communique plus avec le volume intérieur du corps 7. La position normale d'utilisation du récipient de la figure 3 est également tête en haut. Le fonctionnement est semblable à celui de la figure 1, mais l'obturation est obtenue plus rapidement en cas de mauvaise position du récipient pour la pulvérisation.The tubing 111, in FIG. 3, is closed by a bottom 122 against which the ball 21 rests, when the container is in its normal position. The seat 120 is constituted by a frustoconical shoulder provided axially in the vicinity of the connection of the tube 111 and of the body 7. The dip tube 119 is connected to a lateral oblique nozzle 25 opening into the tube 111 upstream of the seat 120 so that, when the ball 21 is sealingly pressed against the seat 120, the tube 119 no longer communicates with the internal volume of the body 7. The normal position of use of the container of FIG. 3 is also head up. The operation is similar to that of FIG. 1, but the shutter is obtained more quickly in the event of the wrong position of the container for spraying.
La figure 4 illustre une autre variante de réalisation d'une valve selon l'invention pour bidon aérosol à fonctionnement normal tête en haut.FIG. 4 illustrates another alternative embodiment of a valve according to the invention for aerosol canisters with normal head-up operation.
Comme dans le cas de la figure 3, la tubu- lure 211 de longueur axiale réduite est munie d'un fond 222 contre lequel repose la bille 21 lorsque le récipient occupe sa position normale. Ce fond 222 est traversé par des passages 26 parallèles à l'axe de la tubulure 211 mais écartés radiale ent de cet axe de sorte que leurs prolongements se trouvent au-delà, dans le sens transversal, du contour de la bille 21 lorsqu'elle est en appui contre le centre du fond 222. Ces passages 26 permettent l'écoulement du fluide provenant du récipient. Le tube plongeur vient coiffer axialement la tubulure 211. Un micro-orifice, non représenté sur la figure 4, est prévu comme dans le cas des figures 1 et 3 sur le rebord du corps de valve.As in the case of FIG. 3, the tubing 211 of reduced axial length is provided with a bottom 222 against which the ball 21 rests when the container occupies its normal position. This bottom 222 is crossed by passages 26 parallel to the axis of the pipe 211 but spaced radially from this axis so that their extensions are beyond, in the transverse direction, of the contour of the ball 21 when it is in abutment against the center of the bottom 222. These passages 26 allow the fluid from the container to flow. The dip tube comes to cap axially the pipe 211. A micro-orifice, not shown in Figure 4, is provided as in the case of Figures 1 and 3 on the flange of the valve body.
Le fonctionnement du récipient équipé de la valve de la figure 4 est semblable à celui décrit précédemment. Si le récipient est placé dans une mau¬ vaise position, par exemple tête en bas, la bille 21 vient s'appliquer contre le siège 220 et empêche toute communication entre l'intérieur du récipient et la sortie de la valve. Lorsque la valve est refermée, l'équilibre de pression s'établit de part et d'autre de la bille 21 en appui sur le siège 220. Dès que le récipient est ramené dans sa position normale, tête en haut, la tige 21 redescend contre le fond 222. Les figures 5 à 7 illustrent une autre vari¬ ante de réalisation d'une valve conforme à l'invention pour un récipient destiné à être utilisé tête en haut. Les éléments des figures 5 à 7 identiques ou semblables à des éléments déjà décrits à propos de la figure 1 sont désignés soit par les mêmes références numériques, soit par une référence numérique égale à la somme du nombre 300 et de la référence utilisée sur la figure 1. La description de ces éléments ne sera pas reprise ou ne sera effectuée que succinctement. La valve 306 comprend, à la place d'une tige de valve, une coiffe 312 tournant sa concavité en sens inverse du corps de valve 307. Le prolongement 313 de diamètre réduit, faisant saillie vers l'extérieur, est solidaire du fond de la coiffe 312 et coaxial à cette dernière. Ce prolongement 313 comporte un canal axial 314 qui, au voisinage du fond de la coiffe 312, communique avec un trou radial 315 traversant la paroi du prolongement 313.The operation of the container equipped with the valve of Figure 4 is similar to that described above. If the container is placed in a bad position, for example upside down, the ball 21 is applied against the seat 220 and prevents any communication between the interior of the container and the outlet of the valve. When the valve is closed, the pressure balance is established on either side of the ball 21 bearing on the seat 220. As soon as the container is returned to its normal position, head up, the rod 21 descends against the bottom 222. Figures 5 to 7 illustrate another vari¬ ante embodiment of a valve according to the invention for a container intended to be used head up. The elements of FIGS. 5 to 7 identical or similar to elements already described with respect to FIG. 1 are designated either by the same numerical references, or by a numerical reference equal to the sum of the number 300 and the reference used in the figure 1. The description of these elements will not be repeated or will be made only succinctly. The valve 306 comprises, instead of a valve stem, a cap 312 turning its concavity in the opposite direction to the valve body 307. The extension 313 of reduced diameter, projecting outwards, is integral with the bottom of the cap 312 and coaxial with the latter. This extension 313 comprises an axial channel 314 which, in the vicinity of the bottom of the cap 312, communicates with a radial hole 315 passing through the wall of the extension 313.
Lorsque la valve 306 est au repos, ce pas¬ sage 315 est fermé par la rondelle 10. Le ressort de rappel 318 est engagé dans la coiffe 312 et comprimé entre le fond de cette coiffe et l'épaulement du corps 307.When the valve 306 is at rest, this pas¬ sage 315 is closed by the washer 10. The return spring 318 is engaged in the cap 312 and compressed between the bottom of this cap and the shoulder of the body 307.
La coiffe 312 comporte sur sa surface extérieure cylindrique deux joncs circulaires 27, 28 espacés axialement et situés vers l'extrémité de la coiffe éloignée du prolongement 313. Ces joncs 27, 28 sont prévus pour coulisser de manière êtanche contre la surface interne du corps 307.The cap 312 has on its cylindrical outer surface two circular rods 27, 28 axially spaced and located towards the end of the cap remote from the extension 313. These rods 27, 28 are provided to slide in leaktight manner against the internal surface of the body 307 .
La paroi de la coiffe 312 est traversée radialement, au voisinage de son fond, c'est-à-dire au voisinage de la base du prolongement 313, par des trous 29 répartis régulièrement sur toute la périphérie.The wall of the cap 312 is crossed radially, near its bottom, that is to say near the base of the extension 313, by holes 29 distributed regularly over the entire periphery.
Un micro-orifice F, constitué par un trou 30 de diamètre réduit est prévu dans la paroi du corps 307 de valve en un endroit tel que, lorsque la coiffe 312 occupe la position de repos (voir figure 7) , ce trou 29 met en communication l'intérieur du corps de valve 307 et de la coiffe 312 avec le récipient 1, le jonc d'étanchéité 28 se trouvant, suivant la direction axiale, du côté du trou 30 opposé à la tubulure 11. Par contre, lorsque le prolongement 313 est enfoncé avec la coiffe 312, comme représenté sur la figure 5, pour assurer l'ouverture de la valve, le trou 30 débouche dans l'espace annulaire fermé compris entre les deux joncs d'étanchéité 27, 28.A micro-orifice F, constituted by a hole 30 of reduced diameter is provided in the wall of the valve body 307 in a place such that, when the cover 312 occupies the rest position (see FIG. 7), this hole 29 puts in place communication inside the valve body 307 and the cap 312 with the container 1, the sealing ring 28 being located, in the axial direction, on the side of the hole 30 opposite the pipe 11. On the other hand, when the extension 313 is pressed in with the cap 312, as shown in FIG. 5, to ensure the opening of the valve, the hole 30 opens into the closed annular space comprised between the two sealing rods 27, 28.
Ceci étant, le fonctionnement de la valve des figures 5 à 7 résulte immédiatement des explica¬ tions qui précèdent. Lorsque le récipient occupe sa position nor¬ male tête en haut, comme illustré sur la figure 5, l'enfoncement du prolongement 313 et de la coiffe 312 assure l'ouverture du passage 315 qui met en communi¬ cation l'intérieur du corps de valve 307 avec le canal 314 et l'extérieur. Les fluides liquide et gazeux peuvent s'écouler par les passages 29 en provenance du récipient 1, vers le canal 314 et la pulvérisation est obtenue. Les joncs d'étanchéité 27 et 28 empêchent une fuite vers l'extérieur à travers le trou 30. Si le récipient est utilisé dans une mau¬ vaise position, par exemple position tête en bas, comme illustré sur la figure 6, la bille 21 vient s'appliquer sur le siège 20 et coupe toute communica¬ tion entre le récipient 1 et le canal axial de sortie 314. Le volume intérieur du corps de valve 307 se trouve à la pression atmosphérique du fait de la com¬ munication établie par le passage 315 lorsque la valve est en position ouverte, la coiffe 312 étant enfoncée. Les joncs d'étanchéité 27 et 28 s'opposent à l'admission de fluide, notamment de liquide, à la pression du récipient 1, dans le corps de valve 307, à travers le trou 30, aussi longtemps que la coiffe de valve est enfoncée, c'est-à-dire aussi longtemps que la valve 306 est maintenue ouverte. Lorsque cette valve 306 revient à sa posi¬ tion de fermeture, comme illustré sur la figure 7, le trou 30 établit une communication entre l'intérieur du récipient 1 et l'intérieur du corps de valve 307, ce qui rétablit l'équilibre de pression de part et d'autre de la bille 21.This being the case, the operation of the valve of FIGS. 5 to 7 immediately results from the foregoing explanations. When the container occupies its normal head-up position, as illustrated in FIG. 5, the depression of the extension 313 and of the cap 312 ensures the opening of the passage 315 which brings the interior of the valve body 307 into communication with the channel 314 and the exterior. The liquid and gaseous fluids can flow through the passages 29 coming from the container 1, towards the channel 314 and the spraying is obtained. The sealing rods 27 and 28 prevent leakage outwards through the hole 30. If the container is used in a bad position, for example upside down position, as illustrated in FIG. 6, the ball 21 is applied to the seat 20 and cuts off all communication between the container 1 and the axial outlet channel 314. The internal volume of the valve body 307 is at atmospheric pressure due to the communication established by the passage 315 when the valve is in the open position, the cap 312 being pushed in. The sealing rings 27 and 28 oppose the admission of fluid, in particular liquid, to the pressure of the container 1, into the valve body 307, through the hole 30, as long as the valve cover is pressed, that is, as long as the valve 306 is kept open. When this valve 306 returns to its closed position, as illustrated in FIG. 7, the hole 30 establishes communication between the interior of the container 1 and the interior of the valve body 307, which restores the balance of pressure on either side of the ball 21.
Lorsque le bidon 1 est ramené dans sa posi¬ tion normale, tête en haut, la bille 21, du fait de l'équilibre des pressions rétabli, peut revenir par gravité dans la position de la figure 5, en quittant le siège 20, ce qui permet à nouveau la communication du récipient 1 et de l'intérieur du corps de valve 307.When the container 1 is returned to its normal posi¬ tion, head up, the ball 21, due to the restored pressure balance, can return by gravity to the position of Figure 5, leaving the seat 20, this which again allows the communication of the container 1 and the interior of the valve body 307.
Les figures 8 et 9 illustrent une variante de valve conforme à l'invention pour un récipient des¬ tiné à être utilisé tête en bas. La valve 406 comporte, sur son corps 407, une extension latérale 31 s'étendant parallèlement à l'axe du corps 407 entre le fond de ce corps et une zone située plus près de la coupelle 5. L'extension 31 communique, à son extrémité éloignée de la coupelle, avec le fond du corps 407 par une tubulure 411 orientée radialement. La bille 21 est disposée dans l'extension latérale 31. Un siège 420 pour cette bille est prévue au voisinage du raccordement de l'extension 31 et de la tubulure 411, c'est-à-dire en partie basse de l'extension 31 lorsque le récipient se trouve tête en haut comme représenté sur la figure 8. Une entrée de gaz 32 est prévue dans la paroi de l'extension 31, du côté de la coupelle 5 par rapport au siège 420, c'est-à-dire en partie haute dans la position de la figure 8. Lorsque la bille 21 est en appui contre le siège 420, l'ouverture 32 assure l'admission de gaz sous pression du côté de la bille opposé au siège.Figures 8 and 9 illustrate a variant valve according to the invention for a container des¬ tiné to be used upside down. The valve 406 has, on its body 407, a lateral extension 31 extending parallel to the axis of the body 407 between the bottom of this body and an area located closer to the cup 5. The extension 31 communicates, at its end remote from the cup, with the bottom of the body 407 by a tube 411 oriented radially. The ball 21 is arranged in the lateral extension 31. A seat 420 for this ball is provided in the vicinity of the connection of the extension 31 and the pipe 411, that is to say in the lower part of the extension 31 when the container is head up as shown in FIG. 8. A gas inlet 32 is provided in the wall of the extension 31, on the side of the cup 5 relative to the seat 420, that is to say in the upper part in the position of FIG. 8. When the ball 21 is in abutment against the seat 420, the opening 32 ensures the admission of gas under pressure on the side of the ball opposite to the seat.
Les autres parties de la valve des figures 8 et 9 sont semblables ou identiques à celles de la valve de la figure 1 et sont désignées par les mêmes références numériques éventuellement additionnées au nombre 400. Leur description ne sera pas reprise.The other parts of the valve of FIGS. 8 and 9 are similar or identical to those of the valve of FIG. 1 and are designated by the same numerical references possibly added to the number 400. Their description will not be repeated.
On notera cependant que le micro-orifice F est constitué par une échancrure 24 dans la nervure périphérique 9 du corps de valve.Note, however, that the micro-orifice F is constituted by a notch 24 in the peripheral rib 9 of the valve body.
Le fonctionnement de la valve des figures 8 et 9 est le suivant.The operation of the valve of Figures 8 and 9 is as follows.
Lorsque le récipient est placé dans sa posi¬ tion normale de fonctionnement "tête en bas", correspondant à la représentation de la figure 9, la bille 21 repose, par gravité, contre le fond de l'extension latérale 31 opposé à la tubulure 411. Lorsque l'utilisateur enfonce la tige de valve 12, les fluides peuvent passer par le trou 32 et s'écouler, à travers le siège 420, vers la sortie de la valve. La pulvérisation peut avoir lieu.When the container is placed in its normal "upside down" operating position, corresponding to the representation in FIG. 9, the ball 21 rests, by gravity, against the bottom of the lateral extension 31 opposite to the pipe 411. When the user pushes the valve stem 12, the fluids can pass through the hole 32 and flow, through the seat 420, towards the outlet of the valve. Spraying can take place.
Par contre, lorsque le récipient est placé dans une mauvaise position, en particulier "tête en haut" comme représenté sur la figure 8, la bille 21 s'applique contre le siège 420 et ferme toute communi- cation avec la sortie.On the other hand, when the container is placed in the wrong position, in particular "head up" as shown in FIG. 8, the ball 21 is applied against the seat 420 and closes all communication with the outlet.
Si la tige de valve 12 est enfoncée, comme illustré sur la figure 8, il n'y a aucune pulvérisation du fait de l'obturation créée par la bille 21. Si, après avoir enfoncé la tige de valve 12 alors que le récipient occupe une mauvaise position, l'utilisateur relâche cette valve, l'intérieur du corps de valve 407 se trouve à la pression atmosphérique de sorte que la différence de pression entre l'intérieur du récipient et l'intérieur du corps de valve 407 contribue à maintenir la bille 21 contre son siège.If the valve stem 12 is depressed, as illustrated in FIG. 8, there is no spraying due to the obturation created by the ball 21. If, after having depressed the valve stem 12 while the container is occupying a bad position, the user releases this valve, the inside of the valve body 407 is at atmospheric pressure so that the pressure difference between the inside of the container and the inside of the valve body 407 helps to maintain the ball 21 against its seat.
Lorsque la tige de valve 12 est relâchée, le micro-orifice F constitué par l'êchancrure 24 n'est plus fermé par la rondelle d'étanchéité 10, et une communication s'établit entre l'intérieur du corps 407 et l'intérieur du récipient, ce qui permet un équili¬ brage des pressions de part et d'autre de la bille 21. Cette dernière pourra alors reprendre la position de la figure 9 dès que le récipient sera placé dans la bonne position, tête en bas, sans avoir à vaincre une force créée par une différence de pression.When the valve stem 12 is released, the micro-orifice F constituted by the notch 24 is no longer closed by the sealing washer 10, and a communication is established between the interior of the body 407 and the interior of the container, which allows a balancing of the pressures on either side of the ball 21. The latter can then resume the position of FIG. 9 as soon as the container is placed in the correct position, upside down, without have to overcome a force created by a difference in pressure.
Quelle que soit la réalisation adoptée, la valve conforme à l'invention permet une économie de l'agent propulseur en réagissant rapidement et en empêchant toute sortie de fluide lorsque le récipient occupe une mauvaise position. Le retour de la valve en position de fonctionnement normal est fiable et rapide grâce à l'équilibrage de pression réalisé de part et d'autre de la bille 21. Whatever the embodiment adopted, the valve according to the invention allows a saving of the propellant by reacting quickly and preventing any outflow of fluid when the container occupies a bad position. The return of the valve to the normal operating position is reliable and rapid thanks to the pressure balancing carried out on either side of the ball 21.

Claims

REVENDICATIONS
1. Valve pour récipient pressurisé ou bidon aérosol , comprenant un corps de valve destiné à être fixé dans une coupelle montée sur le bidon, une tige de valve mobile axialement dans le corps de valve, et des moyens de rappel élastiques pour rappeler la tige de valve en une position de fermeture, tandis que l'ouverture de la valve est obtenue par une action d'enfoncement sur la tige, ladite valve étant combinée avec un clapet sensible à l'action de la pesanteur propre à fermer la sortie de la valve lorsque le récipient occupe une position écartée de sa position normale d'utilisation, caractérisée par le fait qu'un micro-orifice (F) est prévu dans la paroi du corps de valve (7, 307, 407) pour établir une communication entre le volume intérieur sous pression du récipient (1) et la zone de la valve (6, 206, 306, 406) située en aval de l'organe d'obturation (21) du clapet (C) en position fermée, afin d'équilibrer les pressions de part et d'autre de cet organe d'obturation (21) et de faciliter son retour en position ouverte sous l'action de la pesanteur.1. Valve for pressurized container or aerosol can, comprising a valve body intended to be fixed in a cup mounted on the can, a valve stem movable axially in the valve body, and elastic return means for returning the valve in a closed position, while the opening of the valve is obtained by a driving action on the rod, said valve being combined with a valve sensitive to the action of gravity capable of closing the outlet of the valve when the container occupies a position separated from its normal position of use, characterized in that a micro-orifice (F) is provided in the wall of the valve body (7, 307, 407) to establish communication between the internal volume under pressure of the container (1) and the zone of the valve (6, 206, 306, 406) located downstream of the shutter (21) of the valve (C) in the closed position, in order to balance the pressures on both sides of this organ uration (21) and to facilitate its return to the open position under the action of gravity.
2. Valve selon la revendication 1, associée à un tube plongeur, caractérisée par le fait que l'organe d'obturation (21) est disposé dans ledit tube plongeur (19) qui est fermé axialement à son extrémité inférieure et muni d'une entrée latérale (23) décalée radialement par rapport à l'axe du tube (19), le siège2. Valve according to claim 1, associated with a dip tube, characterized in that the closure member (21) is disposed in said dip tube (19) which is axially closed at its lower end and provided with a lateral inlet (23) offset radially from the axis of the tube (19), the seat
(20) de l'organe d'obturation (21) étant prévu à l'extrémité de la queue de valve sur laquelle est engagé le tube plongeur (19) .(20) of the shutter member (21) being provided at the end of the valve stem on which is engaged the dip tube (19).
3. Valve selon la revendication 1, caractérisée par le fait que l'organe d'obturation3. Valve according to claim 1, characterized in that the closure member
(21) est disposé dans un appendice inférieur (111, 211), le siège (120, 220) de l'organe d'obturation(21) is arranged in a lower appendage (111, 211), the seat (120, 220) of the closure member
(21) étant situé à une distance réduite du fond de cet appendice.(21) being located at a reduced distance from the bottom of this appendix.
4. Valve selon la revendication 3, caractérisée par le fait que le tube plongeur (119) débouche latéralement dans l'appendice (111) . 4. Valve according to claim 3, characterized in that the dip tube (119) opens laterally into the appendage (111).
5. Valve selon la revendication 1, pour récipient destiné à être utilisé tête en bas, caractérisée par le fait qu'elle comporte sur son corps (407) une extension latérale (31) avec une entrée de gaz (32) en partie haute et un siège (420) en partie basse, l'organe d'obturation (21) pouvant se déplacer dans cette extension latérale.5. Valve according to claim 1, for a container intended to be used upside down, characterized in that it comprises on its body (407) a lateral extension (31) with a gas inlet (32) in the upper part and a seat (420) in the lower part, the shutter member (21) being able to move in this lateral extension.
6. Valve selon l'une des revendications précédentes, caractérisée par le fait que le micro¬ orifice (F) est constitué par une échancrure (24) de dimensions réduites prévue sur un bord (9) du corps de valve (7) destiné à venir en appui contre une rondelle (10) d'étanchéité sollicitée par la tige (12) de valve.6. Valve according to one of the preceding claims, characterized in that the micro¬ orifice (F) consists of a notch (24) of reduced dimensions provided on an edge (9) of the valve body (7) intended to come to bear against a sealing washer (10) urged by the valve stem (12).
7. Valve selon l'une quelconque des revendi- cations 1 à 5, caractérisée par le fait qu'elle com¬ porte un micro-orifice (30) de passage de gaz prévu dans le corps (7) de valve et une coiffe (312) tour¬ nant sa concavité en sens inverse du corps de valve (307) , propre à se déplacer en coulisse ent dans ce corps de valve, coiffe qui constitue la tige de valve, et comporte vers son fond au moins un trou de passage (29) et, sur sa périphérie deux joncs circulaires d'étanchéité (27, 28) espacés axialement et disposés de manière telle qu'en fonctionnement normal, coiffe enfoncée, le micro-orifice (30) se trouve emprisonné entre les deux joncs (27, 28), tandis qu'en position normale, valve en position fermée, le susdit micro¬ orifice (30) établit un passage entre l'intérieur du corps de valve (307) et le récipient (1) . 7. Valve according to any one of claims 1 to 5, characterized in that it comprises a micro-orifice (30) for the passage of gas provided in the body (7) of the valve and a cap ( 312) turning its concavity in the opposite direction to the valve body (307), suitable for moving behind the scenes in this valve body, cover which constitutes the valve stem, and comprises at its bottom at least one through hole (29) and, on its periphery two circular sealing rods (27, 28) spaced axially and arranged so that in normal operation, cap pressed, the micro-orifice (30) is trapped between the two rods ( 27, 28), while in normal position, valve in closed position, the aforesaid micro¬ orifice (30) establishes a passage between the interior of the valve body (307) and the container (1).
8. Valve selon l'une quelconque des revendi¬ cations précédentes, caractérisée par le fait que l'organe d'obturation (21) , est constitué par une bille.8. Valve according to any one of the preceding claims, characterized in that the shutter member (21) consists of a ball.
9. Récipient pressurisé, ou bidon aérosol, équipé d'une valve selon l'une quelconque des revendi- cations précédentes. 9. Pressurized container, or aerosol can, fitted with a valve according to any one of the preceding claims.
EP92917880A 1991-08-07 1992-07-22 Valve for a pressurized container such as an aerosol can, and pressurized container provided therewith Expired - Lifetime EP0598041B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9110040 1991-08-07
FR9110040A FR2680161B1 (en) 1991-08-07 1991-08-07 VALVE FOR PRESSURIZED CONTAINER TYPE AEROSOL, AND PRESSURIZED CONTAINER EQUIPPED WITH SUCH A VALVE.
PCT/FR1992/000717 WO1993002948A1 (en) 1991-08-07 1992-07-22 Valve for a pressurized container such as an aerosol can, and pressurized container provided therewith

Publications (2)

Publication Number Publication Date
EP0598041A1 true EP0598041A1 (en) 1994-05-25
EP0598041B1 EP0598041B1 (en) 1995-03-22

Family

ID=9415993

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92917880A Expired - Lifetime EP0598041B1 (en) 1991-08-07 1992-07-22 Valve for a pressurized container such as an aerosol can, and pressurized container provided therewith

Country Status (7)

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US (1) US5417357A (en)
EP (1) EP0598041B1 (en)
CA (1) CA2115066A1 (en)
DE (1) DE69201796T2 (en)
ES (1) ES2070010T3 (en)
FR (1) FR2680161B1 (en)
WO (1) WO1993002948A1 (en)

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Also Published As

Publication number Publication date
DE69201796D1 (en) 1995-04-27
FR2680161B1 (en) 1993-11-05
CA2115066A1 (en) 1993-02-18
DE69201796T2 (en) 1995-12-21
ES2070010T3 (en) 1995-05-16
EP0598041B1 (en) 1995-03-22
US5417357A (en) 1995-05-23
FR2680161A1 (en) 1993-02-12
WO1993002948A1 (en) 1993-02-18

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