Fluid flow safety valve

Details Fluid flow safety valve Fluid flow safety valve

1988-03-17

1989-07-04

Nilson, Robert G.

Fluid handling

Control by change of position or inertia of system

With second control

137 80, 137460, 137499, 251 65, F16K 1736

Patent

active

048441139

ABSTRACT:
An automatic shut-off safety valve comprising a movable poppet held in a stable position by magnets and a movable weight. On the occurrence of an abnormal condition, such as a seismic event, the movable weight is displaced and gravity carries the poppet downward until it engages a valve seat, closing off fluid flow. Magnets may also be used to hold the poppet in its closed position. Modifications include using the fluid flow itself to assist in displacing the poppet from its stable position.

REFERENCES:
patent: 2615460 (1952-10-01), Crow
patent: 2821995 (1958-02-01), Semler
patent: 3495620 (1970-02-01), Raimondi
patent: 3768497 (1973-10-01), Mueller
patent: 3805818 (1974-04-01), Yamada
patent: 4382449 (1983-05-01), Nelson
patent: 4603591 (1986-08-01), Sibley
patent: 4658846 (1987-04-01), Johnson

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