DE2233230A1 - AEROSOL DISPENSING VALVE - Google Patents

Description

PATENT LAWYERS

DIPL. ING. WALTER MEISSNER DIPL. ING. HERBERT TlSCHER DIPL. ING. PETER E. MEISSNER Munich

DIPL. ING. H.-JOACHIM PRESTlNG '

BERLIN

E3JÜU1972

1 BERLIN 33 (GRUNEWALD), the ~ HERBERTSTRASSE 22 ''

SBIICHI KETABAYANSHI, Tokyo - Japan Aero s oil dispensing event 11

The invention relates to a novel construction of valves for dispensing aerosol

The object of the invention is to provide aerosol dispensing valves, which have a simplified construction that facilitates assembly of the valves. This · valves should be reliable and have a quiet way of working. Furthermore, these valves are not intended to be chemical Change the solution to be dispensed, as is the case with metallic parts, such as. Valve springs, the Case is, which are normally located in such valves to actuate their plungers.

The most famous valves for aerosol dispensing devices previously had a valve tappet that has a push button with a discharge opening at the top, which has a axial bore in the valve stem is in communication with a valve opening through an elastic seal is locked when the push button is in its closed position, and opened when the Button is pressed down. The valve tappet is held in place by a metal valve spring that attaches to an annular shoulder of the valve stem and the bottom wall of the valve housing engages, which is located on the upper

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Berlin office

Turned up a container of the solution to be dispensed.

Because of the aforementioned metallic spring in the valve housing arise not only in the manufacture of the valves, but also in the use of aerosol dispensing devices disadvantages with such valves. So the metallic springs are so small that they can be removed with the greatest care must be stored so that they do not get dirty before inserting them into the valves. Because of the normal catalytic effect of the metal when oxidizing a chemical change in the solution contained in the container can occur very quickly.

The features and advantages of the invention are based on the Drawings explained. In these is:

Figure 1 is an axial section of an embodiment of the invention in its closed position and in one Aerosol dispensing container, part of which is shown

Figure 2 is a section on the line A-A in Figure 1;

Figure 3 is an axial section of another embodiment of the invention in its closed position in an aerosol dispensing container, part of which is shown; and

Figure 4 is a section on the line B-B in Figure 3 »

The annular elastic seal 3 made of rubber or a similar material is located between the annular hand 21 of the valve housing 2 and a shell wall part 1, which forms part of the upper container wall. The valve housing 2 is firmly surrounded by the shell wall. A valve tappet 4 establishes the connection with the discharge opening 41 in the valve tappet 4 to the discharge opening 7

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in a push button 1o.

The push button 1o is fixedly arranged on the upper side of the valve tappet 4. The side opening 42 is located is in the elastic seal 3 and results in the drain valve.

Either the valve stem 4 or the valve housing 2 has in this housing and in the axial direction elastic spring members 5> which are molded onto the body of the valve tappet 4 or the valve housing 2. Each other part - the valve stem 4 or the valve housing 2 - has a conical wall surface 6 in the housing. Each spring member has a free end 51> which acts on the conical wall surface 6 as a carrier of the valve tappet 4.

In the embodiment of the invention, which is shown in Figure, said spring members 5 are molded onto the valve housing base and extend upward from it. The conical wall surface 6 is molded onto the valve tappet base and forms an upwardly directed recess. In the other embodiment of · the invention according to Figure 3, the spring members 5 are integrally formed on the bottom of the valve stem 4 and go from there down, "The conical surface 6 is located on the bottom wall of the valve housing and forms a one downwardly extending recess with Outlet pipe 8 is connected.

The cylindrical, rod-like member 9 in the embodiment of Figure 9 is a member that with a corresponding Tool can be canceled. It goes through the axial bore of the tappet 41 of the valve, so that the interior of the container can be connected to an exterior space outside the container, the is out of service when the container is empty. This will be

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Prevents damage from implosion of such containers created under the pressure of a leaking gas if the container is thrown into the fire together with other waste will.

In the closed position, as in Figures 1 and 2> take the free ends 51 of the spring members 5 to the conical wall surface 6 and the valve stem 4 is because of the spring force of the spring members 5 in the after upward position, so that the drain valve, which consists of a side opening 42 and an elastic Seal 3 is closed.

When the plunger 4 is moved downwards and the push button is pressed by hand, the side opening 42 separates from the seal 3 and opens into the interior of the valve housing 2, so that the interior of the valve housing 2 pressurized solution through the outlet pipe 8, the side opening 42 and the axial bore 41 in the Can go through the valve tappet and exit through the dispensing opening 7. Then the free ends 51 of the Spring members 5 are pressed so that they move laterally and a resilient restoring force in the spring members 5 cause"

When the valve tappet 4 is released, the resilient members 5 begin by the restoring force in their original positions to return. This restoring force causes a pressure on the conical wall surface in the right Angles. An upward component of the pressure causes the valve stem to move upward The restoring force of the spring members 5 can, however, be proportional are weakened for the upward movement of the valve tappet 4, with the bottom surface of the tappet 4 a pressure works. The problems caused by the solution when dispensing

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acted force is, as upward movement of the valve tappet reinforced because the flow of the solution passing through. the Drain valve passes through it and the pressure is close of the tappet base, proportional to the upward movement of the side opening 42 is steadily decreasing. The upward movement of the valve tappet. thus continues until the Drain valve is completely closed.

According to the invention there is a construction for the spring action a valve tappet created in which an axial pressure is used by the effect and the re-. relative movement of synthetic resin spring links and is conditional on a conical wall surface. Such a construction allows its parts to act as a spring of the valve tappet in a body with a synthetic resin valve lifter or with a valve body made of the same material, so that metallic valve springs as independent parts can be omitted. Such omission of parts simplifies and facilitates the procurement of parts Handling of aerosol dispensing valve devices in operation. It was also found that the spring action in the construction of the valve lifter according to the invention is quieter and lighter compared to known aerosol dispensing valves that use metallic springs, and that the valve action is also correct, in that especially the closing of the drain valve, that by the upward movement of the valve stem as a result of the upward movement of the spring member 5 in a release stage and due to the hydraulic pressure of the solution corresponding to the mechanical pressure of the spring members, the conical wall surface in the last stage of the upward movement is fast enough to cause a leakage to prevent the solution falling down from the dispensing opening.

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An important advantage according to the invention "is that · that, because no metallic springs are used, a chemical change in the solution to be dispensed is caused by accelerated the catalytic effect of metallic springs in most known aerosol dispensing devices is kept infinitely small.

summary

Axial spring members extend either from a valve stem or a valve housing to a conical wall surface on the other of the parts mentioned and result in aerosol dispensing valves in a simple design with quiet work and very little chemical influence on the solution.

2098 82/0099

Claims (7)

. 7. W JWi mi SEIICHI KITABAYAHASHI, Tokyo - Japan claims 1.) Valve for aerosol dispensers with. a ring-tormigen elastic seal between an annular rim of a valve housing and the top wall of a Container for the solution under pressure with a propellant gas, characterized in that the housing (2) is fixed in the container wall (1) is enclosed that a valve tappet (4) sealing by the elastic seal (3) and has a side opening (42) which communicates with an axial bore (41) in the valve stem (4) stands that this opening together with the elastic Seal (3) a drain valve results in either the valve stem (4) or the valve housing (2) spring members (5), which in the axial direction and to the body of the valve tappet (4) or «of the valve housing (2) are that the valve tappet (4) or the valve housing (2) has a corresponding on the tappet or the housing in This has a forated conical pool (6), and that each the spring member (5) engages with a free end (51) on the conical surface (6), so that it the valve tappet (4) carries. 2. Valve according to claim 1, characterized in that the spring members (5) are molded onto the inner wall of the valve housing and extend upwards from the housing bottom wall, and that the conical wall surface (6) is located on the valve tappet bottom surface and forms an upwardly directed conical recess. 3. Valve according to claim 1, characterized in that the spring members' (5) are on the bottom part of the valve stem (4) and run down from there, unA that the conical wall surface (6) on the inner wall, ii.es/en tilgehäusebodens is located and one after lHpen # e / conical recess forms " Dipl.-Inj 209882/0093 BAD ORIGJNAL