Safety device against overpressure particularly for gas pressure

Details Safety device against overpressure particularly for gas pressure Safety device against overpressure particularly for gas pressure

1985-09-23

1986-07-01

Cohan, Alan

Fluid handling

Line condition change responsive valves

Safety cut-off requiring reset

137462, 1374925, F16K 1700

Patent

active

045974098

ABSTRACT:
The high pressure of a gas transport network must be reduced before the gas is admitted to a distribution network to which consumers, e.g. household appliances are connected.
This reduction is carried out by a gas pressure control installation. If this installation fails, conduit failure, appliance failure, explosion and fire may occur.
A known safety device has a closing spring, which closes a valve if the gas pressure unacceptably rises which causes release of the spring by the gas pressure. The movement releasing the spring is influenced by friction which may have an uncertain value. The invention eliminates friction in that the reduced gas pressure acts on the valve via spring loaded membranes, namely a measuring membrane and an actuating membrane.

REFERENCES:
patent: 1139533 (1915-05-01), Kitchen
patent: 2583006 (1952-01-01), Niesmann
patent: 2877791 (1959-03-01), Rich

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