Earthquake tremor responsive shut off valve

Details Earthquake tremor responsive shut off valve Earthquake tremor responsive shut off valve

1986-11-26

1987-08-25

Nilson, Robert G.

Fluid handling

Control by change of position or inertia of system

251 66, F16K 1736

Patent

active

046885927

ABSTRACT:
An earthquake tremor responsive valve closing assembly that includes a magnetically suspended pendulous weight adapted to be dropped upon a cocked trigger assembly for an internally spring biased gas line valve in response to a decrease in magnetic retention force resulting from tremor induced displacements.

REFERENCES:
patent: 3802459 (1974-04-01), Geraudie
patent: 4513763 (1985-04-01), Ware
patent: 4640303 (1987-02-01), Greenberg

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