GB2024956A - Improvements in or relating to valve assemblies for aerosol containers - Google Patents
Improvements in or relating to valve assemblies for aerosol containers Download PDFInfo
- Publication number
- GB2024956A GB2024956A GB7918474A GB7918474A GB2024956A GB 2024956 A GB2024956 A GB 2024956A GB 7918474 A GB7918474 A GB 7918474A GB 7918474 A GB7918474 A GB 7918474A GB 2024956 A GB2024956 A GB 2024956A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- sealing ring
- sealing
- valve housing
- dome
- 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.)
- Withdrawn
Links
- 239000000443 aerosol Substances 0.000 title claims abstract description 18
- 230000000712 assembly Effects 0.000 title description 3
- 238000000429 assembly Methods 0.000 title description 3
- 238000007789 sealing Methods 0.000 claims abstract description 57
- 239000007921 spray Substances 0.000 claims abstract description 41
- 239000000463 material Substances 0.000 claims abstract description 4
- 239000003380 propellant Substances 0.000 abstract description 25
- 239000007788 liquid Substances 0.000 abstract description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 28
- 239000001569 carbon dioxide Substances 0.000 description 14
- 229910002092 carbon dioxide Inorganic materials 0.000 description 14
- 239000000203 mixture Substances 0.000 description 12
- 239000007789 gas Substances 0.000 description 11
- 239000000126 substance Substances 0.000 description 10
- 229930195733 hydrocarbon Natural products 0.000 description 7
- 150000002430 hydrocarbons Chemical class 0.000 description 7
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 4
- 239000003595 mist Substances 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000001273 butane Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 description 2
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 2
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 2
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000001294 propane Substances 0.000 description 2
- -1 propane and butane Chemical class 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000001282 iso-butane Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
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 for dispensing liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant
- B65D83/44—Valves specially adapted for the discharge of contents; Regulating devices
- B65D83/48—Lift valves, e.g. operated by push action
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/08—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like for bottom pouring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
- B22D41/44—Consumable closure means, i.e. closure means being used only once
- B22D41/48—Meltable closures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K23/00—Alumino-thermic welding
-
- 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 for dispensing liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant
- B65D83/16—Actuating means
- B65D83/20—Actuator caps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Continuous Casting (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
- Nozzles (AREA)
Abstract
A valve assembly for an aerosol container comprises a valve housing 14 arranged in the valve dome 11 of the cap 10 of the container, the valve housing having one end 13 crimped in the valve dome and being provided with an annular sealing shoulder 19 located against an elastomeric sealing ring 20. A plurality of through bores 21 are provided between the end 13 and sealing shoulder 19, and a valve member 25 is arranged in the valve housing and urged towards the sealing ring 20 by means of a spring 26 located in the valve housing. A valve stem 34, provided with an axial channel 35, extends through a central opening in the sealing ring and in the valve dome to the exterior of the container, a spray button being provided on the exterior end of the valve stem. The sealing shoulder 19 of the valve housing is composed of a relatively rigid material and has a small slit 24 formed in the surface to provide a vapour tap for propellant gas to mix with effective liquid when the valve is opened. <IMAGE>
Description
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GB 2 024 956 A 1
SPECIFICATION
Improvements in or relating to valve assemblies for aerosol containers
This invention relates to valve assemblies for aerosol containers, of the kind having a valve housing arranged in the valve dome of the container cap, the valve housing having one edge secured in the valving dome and being provided with an annular sealing shoulder located against a resilient sealing ring, at least one through bore being provided between the edge and sealing shoulder, with a valve member arranged in the valve housing and urged towards the sealing ring by means of a spring located in the valve housing, and a valve tappet, provided with an axial channel, extending through a central opening in the sealing ring and the valve dome to the exterior of the container, a spray nozzle being provided on the exterior end of the valve tappet.
A valve assembly of this kind is already known from German Patent Specification No. 1,575,013 013. The edge of the valve housing is secured in the valve dome by crimping and is connected to the remaining part of the housing by resilient cross-pieces, so that its sealing shoulder is raised from the sealing ring during the filling process by bending of the cross-pieces of the sealing ring so ' as to produce a larger filling path.
Since fluorhydrocarbons, which up till now have been predominantly used as propellants in aerosol containers, have been receiving increasing criticism, they are progressively being changed and other propellants being used. With regard to the physical effects and chemical compatibility, a range of other pressure condensable propellants can be offered, such as propane, butane, isobutane, and also carbon dioxide and nitrogen oxide. However, pure hydrocarbons, such as propane and butane, have the disadvantage that they are flammable. Carbon dioxide does not have this disadvantage, on the contrary it restricts oxidation and also has other considerable advantages. On the other hand, in using pure carbon dioxide there is a disadvantage in emptying because it dissolves very slowly and very high primary pressure exists which can be above the bursting load of an aerosol container. For this reason there has been a change-over to mixing pure hydrocarbons with carbon dioxide and/or water, so that the mist from the aerosol is not completely noncombustible but requires certain conditions to exist before it will ignite, which do not usually occur in daily use. All the same a certain danger is accepted in the sale of propellants which include hydrocarbons.
An object of the invention is to produce a valve assembly for an aerosol container which greatly reduces the flammability of the aerosol mist emitted when hydrocarbons are used as propellants and in particular almost completely eliminates it by the addition of carbon dioxide.
According to the invention, in a valve assembly of the kind referred to above, the sealing shoulder of the valve housing is composed of a relatively rigid material and has a small through aperture adjacent the sealing ring.
It is known that a propellant comprising a mixture of pure hydrocarbons, carbon dioxide and, if necessary, water does not completely dissolve in the effective substance but on the contrary forms a cushion of gas, beneath the valve dome, which also comprises a mixture of these gases. On account of the relatively poor solubility of carbon dioxide, the proportion of carbon dioxide in the cushion of gas will be higher than its total proportion should be in relation to the proportions of other gases. In the construction according to the invention, a by-pass route is produced from the cushion of gas beneath the valve dome through which, on opening the valve, gaseous propellant is injected directly into the valve passage between the sealing ring and the valve member sealing surface, and thus into the stream of liquid effective substance and liquid propellant which is emitted. Thereby there is a violent turbulence of the discharge from the aerosol and, under certain circumstances, supersaturation with carbon dioxide, with the result that the flammability of the emerging spray is insignificant. The physical effects which principally come to light hereby could not until now be completely clarified. However, tests have clearly confirmed the considerable reduction in flammability.
The valve housing is preferably made of a relatively hard thermoplastic synthetic material, for example polyethylene. The by-pass route can then be formed by a bore through the sealing shoulder. However, an open slit formed in the surface of the sealing shoulder is preferred, as it is easier to produce.
A preferred feature of the invention is that the annular sealing surface of the valve member is surrounded on the radially outer side by an annular recess formed in the valve member. The mixture of effective substance and propellant which flows through this area when the valve is opened is then violently rotated and thus greatly agitated by the gaseous propellant coming from one side. The concentration of carbon dioxide in the discharged spray mist obviously causes the carbon dioxide, which has a quenching effect, to be present in a greater quantity, expecially when the spray is discharged at a considerable speed, the by-pass route according to the invention contributing to this effect.
In a development of the invention, the turbulent effect occurring in the outer recess is continued through an annular recess provided on the radially inner side of the sealing surface of the valve body, which is connected to one or several openings on the valve tappet.
It is evident that the spray composed of the mixture of effective substance and propellant must be intensely mixed with the gas passing along the by-pass route and must be expelled at high speed. This is improved in a further development of the invention, in which the axial channel in the valve tappet includes a portion having a narrow cross-section, and communicates with a centrifugal
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GB 2 024 956 A 2
chamber formed in the valve tappet and/or the spray head. The mixture flows through the narrow cross-section at high speed into the centrifugal chamber, where it is again violently agitated, g The nonflammability or low flammability obtained by the above features for aerosol sprays having a more or less high proportion of pure hydrocarbons as propellant, is increased by a further feature of the invention, in which a spray 1 q nozzle placed in the spray head induces a vortex in the spray flow. Tests have shown that this type of spray flow, which has a highly saturated or supersaturated proportion of propellant gases and produces a mist with particles of uniform size, 1 g not only fails to ignite over an open flame, but can also even extinguish the flame under these conditions. Relatively large aerosol drops, which frequently occur in known cases on the edge of the spray flow and in particular can easily ignite, 20 cannot be observed with this invention.
To obtain a vortex in the spray flow, various possible constructions can be considered. One development of the invention consists in that the spray nozzle has several slightly curved channels 25 extending in a plane at right angles to the nozzle opening, which preferably flow into the nozzle opening offset from the axis of the nozzle opening.
The above-mentioned effects of the valve • assembly and of the spray head associated 30 therewith are assisted by the fact that the intake opening in the valve housing for the liquid mixture of effective substance and propellant has a relatively small cross-section.
It is to be stressed that the object of the 35 invention can be achieved solely by a valve assembly which incorporates the by-pass route. However, it is of particular advantage for the valve assembly to be combined with the constructional features of the spray head and spray nozzle. 40 A valve assembly in accordance with the invention will now be described, by way of example, with reference to the accompanying drawings, in which:—
Figure 1 is a cross-sectional view through the 45 valve assembly and an associated spray head,
with the valve closed,
Figure 2 is a view similar to that of Figure 1 but with the valve open,
Figure 3 is a rear elevation of a spray nozzle for 50 the spray head of Figures 1 and 2, at an enlarged scale, and
Figure 4 is a cross-section through the nozzle, taken along the line A—4 of Figure 3.
In Figures 1 and 2 there can be seen a cap 10 55 of an aerosol container (not shown). The cap 10 includes a central valve dome 11 which has an upper central opening 12 and into which is crimped a flange-like edge 13 of a valve housing generally referred to as 14. Beneath the flange 13 00 the valve dome 11 curves in the direction of a main body 15 of the valve housing 14, but a gap 16 is left between the valve dome 11 and the main body 15.
The valve housing 14, which can consist of, for 55 example, acetalcopolymeride, has a tubular socket
17 extending from the lower end of the cylindrical main body 15, for connection with a riser (not shown). The socket 17 communicates with the interior of the body 15 through a relatively narrow orifice 18. At its upper end the body 15 has a conically tapering sealing shoulder 19 engaging with an elastomeric sealing ring 20 which is supported on the inside of the upper wall of the valve dome 11. In the region between the main body 15 and the flange 13 several circular apertures 21 are provided, for example eight apertures arranged at regular intervals. Above the apertures 21 the flange 13 is circular on the inside, as shown at 22. Between the apertures 21, the flange 13 and the main body 15 are interconnected by individual raised cross-pieces, as shown at 23. Finally, across the sealing surface of the shoulder 19a narrow slit 24 is provided.
Inside the main body 15 of the valve assembly 14 a valve member 25 is provided which can move smoothly and is urged in the direction of the sealing ring 20 by means of a helical spring 26, whereby a circular sealing surface 27 of the valve member 25 butts against the under side of the sealing ring 20. The valve body 25 has at its lower end a circumferential flange 28 which leaves a free gap between itself and the inner wall of the main body 15. The flange 18 is broken at diametrically opposite points by a slot 29 in the underside of the valve member 25. Several axially-directed serrations 30 distributed equidistantly around the periphery of the valve member 25 extend from the flange 28 upwardly to an annular recess 31 which surrounds the sealing surface 27 and communicates with the slit 24.
An annular recess 32 is formed at the radially inner side of the sealing surface 27 and, as can be seen from Figures 1 and 2, communicates with a metering orifice 33 provided in a valve tappet 34. The valve tappet 34 is produced separately from and is wedged in an annular recess of the valve member 25, and extends through a central aperture in the sealing ring 20 and through the opening 12 of the valve dome 11. The valve tappet 34 has an axially-extending through channel 35 which towards the top has a conically tapering section 36 terminating in a narrow cross-section 37. The narrow cross-section 37 opens into a centrifugal chamber 38 which comprises an upper recess in the valve tappet 34 and, aligned therewith, a recess in a spray head 39. The spray head 39 has a central cylindrical bore which is an interference fit on the upper cylindrical section of the valve tappet 34.
The spray head has a semicircular channel 40 communicating with the centrifugal chamber 38, this channel 40 merging into a ring channel 41 which extends over a conical section 42 into an outer recess 43 into which a spray nozzle is inserted. An example of a spray nozzle is shown in Figures 3 and 4.
The spray nozzle generally referred to as 44 comprises a circular disc 45 which is received in the recess 43. A tubular connecting piece 46 is formed on the back of the disc 45, and this
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GB 2 024 956 A 3
connecting piece 46 is inserted into the ring channel 41 of the spray head 39. A central nozzle 47 is formed in the disc 45. On the back of the disc 45 inside the area bounded by the connecting piece 46 there are four channels 48 curved at equal distances from each other which lead into a common recess 49 surrounding the nozzle opening 47. The curvatures of the channels 48 are similar and cause the annular flow of the mixture of effective substance and propellant passing through the spray head to rotate and thereby induce a strong vortex into the flow emerging from the nozzle 47.
As can be seen from Figure 2, opening the valve by pressing down on the spray head 39 displaces the valve tappet 34 and thereby moves the valve member 25 against the force of the spring 26 in the valve housing, so that the sealing surface 27 of the valve member 25 lifts away from the sealing ring 20. Thereby the mixture of propellant and effective substance can pass between the valve housing and the valve member into the annular inner recess 32 and from there into the channel 35 of the valve tappet 34. Moreover a mixture of pure gas passes from the cushion of gas directly beneath the cap 10 through the small slit 24 into the recess 31 and the recess 32, so that here the mixture of effective substance and propellant is rotated, which leads to an intensive inter-mixing of the additional gas with the mixture of effective substance and propellant. The mixture thus produced, which is preferably saturated or supersaturated with propellant gas, particularly carbon dioxide, passes at high speed through the narrow cross-section 37 into the centrifugal chamber 38, where the mixing is further improved by turbulence. The flow of the agent which is passed at high speed to the spray nozzle is subjected to vigorous vorticity so that a homogenous aerosol spray jet rotating round the axis of the spray nozzle is obtained, which with the use of pure hydrocarbons as propellant produces minimal flammability and with the addition of carbon dioxide and/or water produces virtually no flammability.
The valve assembly described above is in other respects also of advantage for speedily filling an aerosol container with propellant. Speedy filling is especially necessary when adding carbon dioxide to the propellant. The propellant is forced in under high pressure (up to 60 bars) and thereby curves the inner area of the semifloating sealing ring 20 upwardly, which can be facilitated by a corresponding formation of the upper side of the valve dome 11. In this way the sealing ring also iifts up from the sealing shoulder 19 of the valve housing 14, so that the greatest amount of compressed propellant flows through the apertures 21 at high speed into the container.
Claims (1)
1. A valve assembly for an aerosol container, having a valve housing arranged in the valve dome of the cap of the container, the valve housing having one edge secured in the valve dome and being provided with an annular sealing shoulder located against a resilient sealing ring, at least one through bore being provided between the edge and sealing shoulder, with a valve member arranged in the valve housing and urged towards the sealing ring by means of a spring located in the valve housing, and a valve tappet, provided with an axial channel, extending through a central opening in the sealing ring and in the valve dome to the exterior of the container, a spray nozzle being provided on the exterior end of the valve tappet, wherein the sealing shoulder of the valve housing is composed of a relatively rigid material and has a small through aperture adjacent the sealing ring.
2. A valve assembly according to claim 1, wherein the small through aperture comprises a slit formed in the surface of the sealing shoulder.
3. A valve assembly according to claim 1 or claim 2, wherein the valve member has an annular sealing surface which is surrounded on the radially outer side by an annular recess.
4. A valve assembly according to any preceding claim, wherein the valve member has an annular sealing surface which is surrounded on the radially inner side by an annular recess which communicates with at least one opening in the valve tappet.
5. A valve assembly according to any preceding claim, wherein the axial channel in the valve tappet includes a portion having a narrow cross-section, which communicates with a centrifugal chamber formed in the valve tappet and/or the spray nozzle.
6. A valve assembly according to any preceding claim, wherein a spray nozzle is arranged in the spray head and includes means intended to produce a vortex in the spray flow.
7. A valve assembly according to claim 6, wherein the spray nozzle has curved channels extending in a plane at right angles to the nozzle opening, which are offset from the axis of the nozzle opening and feed into the nozzle opening to produce a vortex in the spray flow.
8. A valve assembly substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
9. An aerosol container including a valve assembly according to any preceding claim.
New claims or amendments to claims filed on 15 Oct 1979.
Superseded claims 1.
New or ammended claims:—
1. A valve assembly for an aerosol container, having a valve housing arranged in the valve dome of the cap of the container, the valve housing having one radial flange secured in the valve dome and being provided with an annular sealing shoulder located against a resilient sealing ring, at least one through bore being provided between the flange and the sealing shoulder, with a valve member arranged in the valve housing and urged towards the sealing ring by means of a spring located in the valve housing, the valve member
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GB 2 024 956 A 4
having a sealing surface which engages the sealing ring radially inwardly of the sealing shoulder, and a valve tappet, provided with an axial channel, extending through a central opening 5 in the sealing ring and in the valve dome to the exterior of the container, a spray nozzle being provided on the exterior end of the valve tappet.
while a transverse bore in the tappet connects the channel to a space radially inwardly with respect 1 o to the sealing shoulder, wherein the sealing shoulder of the valve housing is composed of a relatively rigid material and has a small through aperture adjacent the sealing ring.
Printed for Her Majesty's Stationery Office by the Courier Press. Leamington Spa, 1980. Published by the Patent Office, 25 Southampton Buildings, London, WC2A 1 AY, from which copies may be obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7921365A GB2022793B (en) | 1979-05-25 | 1979-06-19 | Fluidized bed apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19782822931 DE2822931C2 (en) | 1978-05-26 | 1978-05-26 | Valve arrangement for aerosol containers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2024956A true GB2024956A (en) | 1980-01-16 |
Family
ID=6040190
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7826573A Expired GB2022794B (en) | 1978-05-26 | 1978-06-09 | Casting crucible for alumiothermic welding |
| GB7918474A Withdrawn GB2024956A (en) | 1978-05-26 | 1979-05-25 | Improvements in or relating to valve assemblies for aerosol containers |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7826573A Expired GB2022794B (en) | 1978-05-26 | 1978-06-09 | Casting crucible for alumiothermic welding |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE2822931C2 (en) |
| FR (1) | FR2426623A1 (en) |
| GB (2) | GB2022794B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2335954A (en) * | 1998-04-03 | 1999-10-06 | Leung Timothy Bak Kwan | Valve for pressurised dispensing container |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3211831C2 (en) * | 1982-03-31 | 1984-01-12 | Elektro-Thermit Gmbh, 4300 Essen | Self-opening closure for pouring crucibles used in aluminothermic reactions |
| GB9418291D0 (en) * | 1994-09-10 | 1994-10-26 | Foseco Int | Improvements in molten metal handling vessels |
| EP0914889A1 (en) * | 1997-10-31 | 1999-05-12 | Elektro-Thermit GmbH | Self-opening closure for vessel |
| CN105081558B (en) * | 2015-09-22 | 2017-04-12 | 武汉大学 | Overhead welding and cutting equipment |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1464189A (en) * | 1965-11-30 | 1966-12-30 | Clayton Corp Of Delaware | Spray head assembly on valve hose |
| GB1076329A (en) * | 1965-12-01 | 1967-07-19 | Scovill Manufacturing Co | Aerosol valve |
| US3462047A (en) * | 1967-10-24 | 1969-08-19 | Clayton Corp | Valve for proportioned co-dispensing of two fluids |
| GB1287470A (en) * | 1968-11-25 | 1972-08-31 | Gillette Co | Pressurised dispensing package |
| US3583606A (en) * | 1969-10-20 | 1971-06-08 | Pittway Corp | Self-cleaning valve |
| US3580431A (en) * | 1970-03-20 | 1971-05-25 | Valve Corp Of America | Aerosol valve tip and stem assembly and method of assembling same |
| US3653558A (en) * | 1970-10-15 | 1972-04-04 | Scovill Manufacturing Co | Aerosol valve having selectable spray rate |
| US3731847A (en) * | 1971-06-01 | 1973-05-08 | Gillette Co | Plural compartment pressurized dispensing package |
| US3767086A (en) * | 1971-06-15 | 1973-10-23 | Vca Corp | Aerosol valve construction for dispensing two fluids |
| DE2206079B2 (en) * | 1972-02-09 | 1973-12-06 | Deutsche Praezisions-Ventil Gmbh, 6234 Hattersheim | Valve for pressurized gas packs |
| GB1362885A (en) * | 1972-03-03 | 1974-08-07 | Aerosol Inventions Dev | Pressurised aerosol dispensing containers |
| DE2425149C3 (en) * | 1974-05-24 | 1980-08-28 | Hilmar 6201 Oberjosbach Schneider | Aerosol valve |
| DE2556164A1 (en) * | 1975-01-29 | 1977-06-23 | Deutsches Praezisions Ventil G | Valve for pressure gas packing - has sealing disc pressed against wall of valve support by charging pressure |
-
1978
- 1978-05-26 DE DE19782822931 patent/DE2822931C2/en not_active Expired
- 1978-06-09 GB GB7826573A patent/GB2022794B/en not_active Expired
-
1979
- 1979-05-23 FR FR7913139A patent/FR2426623A1/en active Pending
- 1979-05-25 GB GB7918474A patent/GB2024956A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2335954A (en) * | 1998-04-03 | 1999-10-06 | Leung Timothy Bak Kwan | Valve for pressurised dispensing container |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2822931A1 (en) | 1979-11-29 |
| FR2426623A1 (en) | 1979-12-21 |
| GB2022794A (en) | 1979-12-19 |
| DE2822931C2 (en) | 1983-05-11 |
| GB2022794B (en) | 1982-05-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |