Resettable vibration-actuated emergency shutoff mechanism

Details Resettable vibration-actuated emergency shutoff mechanism Resettable vibration-actuated emergency shutoff mechanism

1987-08-07

1988-11-22

Nilson, Robert G.

Fluid handling

Control by change of position or inertia of system

251 65, F16K 1736

Patent

active

047858427

ABSTRACT:
A valve movable elevationally in a valve casing between a lower closed position and an elevated open position is or carries a magnetizable component of magnetic means. Upward movement of the valve is limited by engagement with an annular stop flange projecting downward from the upper portion of the casing. A permanent magnet component of the magnetic means is received inwardly of the annular stop flange and is movable upward by cooperating screw threads to separate the magnet component from the armature carried by the valve after the valve has been raised from closed position into engagement with the stop flange by elevational movement of the permanent magnet component relative to the valve casing.

REFERENCES:
patent: 2927592 (1960-03-01), Ferre, Sr.
patent: 3360007 (1967-02-01), Haidek et al.
patent: 3783887 (1974-01-01), Shoji
patent: 4116209 (1978-09-01), Greer
patent: 4207912 (1980-06-01), Ichikawa
patent: 4640303 (1987-02-01), Greenberg

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