Dispensing – With discharge assistant – Fluid pressure
Patent
1981-08-11
1984-10-16
Rolla, Joseph J.
Dispensing
With discharge assistant
Fluid pressure
222507, 222509, 222514, 222518, B65D 8314
Patent
active
044770014
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a valve for pressurized containers, like aerosol containers with a closing member which is movable towards a valve seat and engages thereon in its rest position or locking position.
It is known to fill paste and liquids together with a gas like propelling means into containers. Thereby, containers are known wherein the product together with the propelling means are charged into one chamber. When opening the valve, the product is discharged under the influence of the propellant and is propelled therewith as a spray, or the like. Furthermore, containers are known, wherein the product and the propellant are separated from each other. Such containers have an elastic inner bag for receiving the product. In such a container, the gas like propellant is disposed in the annular like space between the inner bag and the container. In these containers, the elastic inner bag is closed to the outside by a valve. When opening the valve, the propellant can expand and press the inner bag together, thus driving the product therefrom. The same valves are used for both container types. They will be opened either by pressure or the sliding displacement movement of a part. Furthermore, they have a special spring or a spring element made of metal, rubber or an elastic plastic material which presses the closing member on the valve seat in the closing position. The push for opening the valve is carried out by pushing against this spring element.
SUMMARY OF THE INVENTION
It is an object of the subject invention to provide a valve of this type which is opened by pushing, but which does not require a special spring element. In this context it should be mentioned that the individual parts of a valve of the type in question are usually made with the extrusion molding method from plastic material with different elasticity. By omitting a spring element, not only a structural element is eliminated but also its manufacturing and assembly, but there is also the possibility to operate without any metal or a special selected plastic material which has the required yielding characteristics. The elimination of such plastic material and, in particular metal is advantageous in products which should not come into contact with metal, because it would change their characteristics.
The physical principle on which the inventive solution to the object of the invention is based, will now be explained with respect to FIGS. 1 and 2. During a pivoting from the position A-C shown in full lines into the position A-E shown in dash-dot lines, the points B and C have travelled different paths. The path B-D is shorter than the path C-E. These differently long paths are illustrated by the arrows. It has to be assumed that the part F is a valve closing member which engages on its valve seat G. The valve seat G would be connected with the part H. Within this meaning it is further assumed that the valve closing member F is connected with the point C and the valve seat G with the point B of the assumed lever A-C. When pivoting this lever into the position A-E the member F has moved downwardly by the larger path C-E and valve seat G by the shorter path B-D. This results in the picture shown in FIG. 2. The valve seat locking member F is no longer in engagement with valve seat G. The valve is open. In a constructive realization of these theoretical considerations the valve would open or close due to the different speeds of its locking member and its valve seat. Thereby, for the moment it is to be assumed that B and C do not move in a circular path around A, but that they can perform the linear movements B-D and C-E.
The constructive realization in a valve of the aforementioned type, in view of the just mentioned idea, is realized by using the following features: provided with the valve seat and at its lower inner end with recesses, radially therefrom and are guided to the inside through recesses, sliding sleeve which on its upper end is provided with the closing member and is connected with its lower end with the
REFERENCES:
patent: 234035 (1880-11-01), Houts
patent: 2437589 (1948-03-01), Bink
patent: 3052382 (1962-09-01), Gawthrop
patent: 3372844 (1968-03-01), Kitabayashi
patent: 4120431 (1978-10-01), Schultz
Handren Frederick R.
Rolla Joseph J.
Striker Michael J.
Wella Aktiengesellschaft
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