Tremor-responsive shut-off valve

Details Tremor-responsive shut-off valve Tremor-responsive shut-off valve

1991-01-22

1991-11-05

Nilson, Robert G.

Fluid handling

Control by change of position or inertia of system

F16K 1736

Patent

active

050624407

ABSTRACT:
The apparatus of the invention incorporates a ball-cock valve incorporated within a gas or water main, or pipe. The valve is provided with a handle to controllably open or close the gas or water flow, and the handle is coupled to an actuator weight. The "weight" quiescently rests on the platform of a stand situated above the handle and angularly sloped toward it. With the valve initially opened, earthquake tremors of a prescribed magnitude serve to shake the weight off the platform, and its fall automatically rotates the handle to close the valve and seal off the main or pipe.

REFERENCES:
patent: 378938 (1888-03-01), Parker
patent: 1405950 (1922-02-01), Stafford
patent: 4165758 (1979-08-01), Douce
patent: 4844113 (1989-07-01), Jones

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