Earthquake triggered gas valve

Details Earthquake triggered gas valve Earthquake triggered gas valve

1988-05-20

1989-01-24

Nilson, Robert G.

Fluid handling

Control by change of position or inertia of system

F16K 1736

Patent

active

047995050

ABSTRACT:
An earthquake triggered gas valve in which the valve member on an axial valve rod is forced open by a ball propped between the end of the valve rod and a retractable post in the conical floor of the valve outlet chamber. The ball is at least partially filled with a dense fluid such as mercury which has a inertia that will oppose that of an earthquake moved valve housing. The ball will thus be dislodged to permit the valve to close. The valve is easily reopened by lowering the retractable post to reset the ball which is then lifted to raise the valve rod and valve.

REFERENCES:
patent: 4336818 (1982-06-01), Dauvergne

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