Earthquake-responsive fuel shut-off device

Details Earthquake-responsive fuel shut-off device Earthquake-responsive fuel shut-off device

1976-10-12

1978-06-13

Nilson, Robert G.

Fluid handling

Control by change of position or inertia of system

By pendulum or swinging member

251 25, 251 611, F16K 1736

Patent

active

040943321

ABSTRACT:
A master valve adapted for insertion in a fuel line to be controlled and a fluid-pressure-responsive actuator responsive to fuel line pressure for maintaining the valve in open position against the resistance of a valve-closing spring; and a normally closed earth-movement-responsive auxiliary valve connected to the fuel line and the aforesaid actuator and functioning in response to a predetermined minimum severity earthquake to open the auxiliary valve and equalize the pressure in the actuator to effect closing of the master valve by its closing spring.

REFERENCES:
patent: 2637331 (1953-05-01), Sullivan
patent: 2665710 (1954-01-01), McGarry
patent: 3043321 (1962-07-01), Hewitt
patent: 3078066 (1963-02-01), Moore
patent: 3783887 (1974-01-01), Shoji

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