Fluid shut-off device

Details Fluid shut-off device Fluid shut-off device

1979-03-06

1981-01-20

Schwadron, Martin P.

Valves and valve actuation

Permanent or constantly energized magnet actuator

137 39, 236 48A, 236DIG3, 251 68, F16K 3108

Patent

active

042458145

ABSTRACT:
A fluid shut-off device is provided which comprises a non-magnetic casing having a fluid passage therein, a metallic valve body movably disposed in the casing to close the passage at one operative position, and a magnetic member slidably disposed outside the casing and magnetically attracting the valve body. The magnetic member takes an inoperative position against a spring force and is locked at this position. The lock is released by a bimetallic strap deformable by supply of an electric current. When the lock is released, the magnetic member is moved by the action of the spring force, so that the valve body magnetically attracted by the magnetic member is also moved to the operative position to shut off the flow of fluid material through the passage.

REFERENCES:
patent: 2652065 (1953-09-01), Kutzler
patent: 2684074 (1954-07-01), Kutzler et al.
patent: 2781979 (1957-02-01), Kraft
patent: 3783887 (1974-01-01), Shoji
patent: 3965917 (1976-06-01), Speck
patent: 4098284 (1978-07-01), Yamada
patent: 4167194 (1979-09-01), Matsuda

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