Fluid pressure control device

Details Fluid pressure control device Fluid pressure control device

1983-06-06

1984-11-13

Schwadron, Martin P.

Fluid handling

Self-proportioning or correlating systems

Self-controlled branched flow systems

13750525, G05D 1606

Patent

active

044819692

ABSTRACT:
The safety device is disposable in the gas line connecting between a gas source under pressure and a tapping device installed in a keg. The safety device includes a valve housing carrying a spring biased, axially movable piston assembly including a valve body and an axially movable stem element. Upon an increase in gas line pressure above a predetermined pressure, the gas acts on the piston assembly to displace it as a unit in an upstream direction against the bias of the spring to seal the stem against a primary valve seat element and preclude further ingress of gas into the keg. However, should the primary valve seat element leak, due to wear or contamination, causing pressure within the system to increase, the valve body will move relative to the valve stem to vent the housing to atmosphere and to close a secondary valve seat adapted to positively prevent further fluid flow downstream of the device toward the keg.

REFERENCES:
patent: 3042061 (1962-07-01), Dobrikin
patent: 3411523 (1968-11-01), Lapera
patent: 3834837 (1974-09-01), Nickell
patent: 3848631 (1974-11-01), Fallon

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