Dispensing – With discharge assistant – Fluid pressure
Patent
1992-03-31
1993-09-07
Kashnikow, Andres
Dispensing
With discharge assistant
Fluid pressure
137322, 2224021, 22240215, B65D 8314
Patent
active
052420922
DESCRIPTION:
BRIEF SUMMARY
The invention concerns a valve arrangement in particular for a transportable container of the type serving to store and distribute a liquid under pressure from a propellant gas, said arrangement comprising a ring-shaped stub secured in an opening upwardly in the container and a double valve having both a blockable gas passage and a blockable liquid passage and substantially consisting of a valve housing, which can be detachably mounted in the stub, and a riser pipe part arranged co-axially with an upper reception area in the valve housing such that said riser pipe part can be displaced axially from an upper closed valve position to a lower open valve position against the pressure from a spring mounted in the valve housing.
Today many different types of liquid, e.g. beverages, or liquids such as concentrates and plant protection agents, are stored and distributed in transportable containers under pressure from a propellant gas. For this purpose each container is provided with a double valve which both has a passage for the gas supply and a passage for propelling the liquid out of the container under the action of the gas pressure. This valve is generally mounted in a stub which is secured in an opening upwardly in the container, and in some cases this mounting takes place merely by means of a simple threaded connection, involving the risk that the valve can cause considerable damage since it can be readily dismounted before the gas pressure in the container has been fully relieved, and will then be ejected to the surroundings with great force by this pressure immediately when the threads disengage. In other cases the valve is mounted or adapted so that it cannot fully or partly be removed completely from the container before the pressure in it has been relieved, whereby the above-mentioned risk is essentially eliminated. However, all of these known arrangements suffer from the drawback that they have a complicated structure and are therefore expensive to manufacture, and to this should be added that mounting and dismounting of them is moreover cumbersome and time-consuming.
The object of the invention is to provide a valve arrangement of the type mentioned in the opening paragraph which cannot be removed completely from the container before the pressure in it has been relieved, and which additionally has a simpler and cheaper structure and can be mounted and dismounted more easily and rapidly than known before.
This is achieved in that the valve arrangement of the invention is characterized in that the riser pipe part can be displaced additionally a distance axially downwardly from the lower open position to a lower bottom position, and that the riser pipe part mounts an outwardly protruding finger with a free end part so spaced from the top and axis of the riser pipe part that a mounted valve cannot be dismounted completely in any of the positions of the riser pipe part, except in and in the vicinity of the bottom position. Such arrangements normally have a special coupling head, which can be fixed in the valve or on the stub, and which thereby connects the valve with partly a pressure gas source, partly a liquid dispensing location. When the coupling head is activated, an axially displaceable spindle in the head forces the riser pipe part downwardly so that the gas passage opens, while a valve plug in the riser pipe part is pressed downwardly so that the liquid passage opens. The above-mentioned safety mechanism operates by means of a direct continuation of this downwardly directed movement and therefore constitutes a simple and inexpensive structure, which also has the advantage that it is easy and rapid to operate. Nevertheless, it is impossible for unauthorised persons to dismount a valve completely, since this requires a special tool which is adapted for precisely this task, and which is not available to ordinary users.
In a particularly simple and advantageous embodiment of the invention, the finger can extend in an obliquely downwardly and outwardly extending direction from the riser pipe part and u
REFERENCES:
patent: 4411287 (1983-10-01), Hyde
patent: 4541658 (1985-09-01), Bartholomew
patent: 5054743 (1991-10-01), Norkey et al.
patent: 5069424 (1991-12-01), Dennany, Jr. et al.
Augustinus Per K.
Riis Ken
Kashnikow Andres
Kaufman J. A.
Micro Matic A/S
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