Gas breaker, automatic gas shut-off valve

Details Gas breaker, automatic gas shut-off valve Gas breaker, automatic gas shut-off valve

1990-08-24

1991-10-01

Nilson, Robert G.

Fluid handling

Control by change of position or inertia of system

251 65, F16K 1736

Patent

active

050524291

ABSTRACT:
A gas flow shut-off valve that senses seismic motion inducing oscillating ball movement in a concave dish of a lateral valve chamber. When the intensity of seismic shaking reaches a destructive level, the ball valve is dislodged from the dish into a valve seat, thus blocking the gas flow passage through the valve. The tripped ball is reset from outside the valve by using a strong magnet to retrieve the ball from the valve seat and back to the dish.

REFERENCES:
patent: 2585316 (1952-02-01), Hobson
patent: 3747616 (1973-07-01), Lloyd
patent: 4382449 (1983-05-01), Nelson
patent: 4485832 (1984-12-01), Plemmons
patent: 4565208 (1986-01-01), Ritchie
patent: 4715394 (1987-12-01), O'Donnell
patent: 4785842 (1988-11-01), Johnson

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