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
Links
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
Claims
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)
Country | Link |
---|---|
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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DE3742901A1 (en) * | 1987-11-10 | 1989-05-24 | Future Patents Dev Fpd | SPRAY HEAD FOR A CONTAINER FOR A LIQUID UNDER PRESSURE OF A GAS GAS |
FR2626198B1 (en) * | 1988-01-22 | 1990-06-22 | Valois Sa | DEVICE FOR ALLOWING OPERATION IN ANY POSITION OF A VAPORIZER VALVE |
US4940171A (en) * | 1989-05-18 | 1990-07-10 | Gilroy Gordon C | Aerosol package having compressed gas propellant and vapor tap of minute size |
GB8920365D0 (en) * | 1989-09-08 | 1989-10-25 | Warren William E | Check valves |
-
1991
- 1991-08-07 FR FR9110040A patent/FR2680161B1/en not_active Expired - Fee Related
-
1992
- 1992-07-22 EP EP92917880A patent/EP0598041B1/en not_active Expired - Lifetime
- 1992-07-22 CA CA002115066A patent/CA2115066A1/en not_active Abandoned
- 1992-07-22 US US08/190,186 patent/US5417357A/en not_active Expired - Fee Related
- 1992-07-22 DE DE69201796T patent/DE69201796T2/en not_active Expired - Fee Related
- 1992-07-22 WO PCT/FR1992/000717 patent/WO1993002948A1/en active IP Right Grant
- 1992-07-22 ES ES92917880T patent/ES2070010T3/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9302948A1 * |
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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