Valves and valve actuation – Permanent or constantly energized magnet actuator
Patent
1974-03-08
1976-04-20
Rosenthal, Arnold
Valves and valve actuation
Permanent or constantly energized magnet actuator
251129, 13762565, 251 89, F16K 3108
Patent
active
039513785
ABSTRACT:
A manually resettable valve comprises a valve body having a cylindrical portion with a wetted enclosure defined by an internal coaxial aperture within which a magnetically attractable plunger is slidable between two terminal positions establishing the states of the valve. A spring urges the plunger toward a first terminal position; and an electromagnet mounted on the body and responsive to an electrical signal when the plunger is in its first terminal position magnetically attracts the plunger and moves it to a second position against the action of the spring. Finally, a permanent magnet in a magnetic circuit, whose elements include the cylindrical portion of the body and the plunger, holds the plunger independently of the electromagnet in its second terminal position thereby holding the valve in its "latched" state. Some of the elements of the magnetic circuit are manually movable relative to other of the elements for selectively disrupting the circuit and causing the permanent magnet to release the plunger whereby the spring is effective to move the plunger from its second terminal position to its first terminal position, thereby resetting the valve to its "unlatched" state.
REFERENCES:
patent: 3212751 (1965-10-01), Hassa
patent: 3368788 (1968-02-01), Padula
patent: 3379214 (1968-04-01), Weinberg
patent: 3675171 (1972-07-01), Kirk
Oramt Turbines Ltd.
Rosenthal Arnold
Sandler Donald M.
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