Valves and valve actuation – Permanent or constantly energized magnet actuator
Patent
1979-08-30
1981-10-27
Schwadron, Martin P.
Valves and valve actuation
Permanent or constantly energized magnet actuator
251122, 308139, F16K 3108
Patent
active
042969123
ABSTRACT:
This invention relates to a shifting stem metering valve that is magnetically actuated. A driven magnet assembly is rotatably supported in a nonmagnetic pressurizable bonnet fixed to the main valve body. The driven magnet assembly preferably comprises rare earth cobalt magnets defining an even number of north and south poles. A cylindrical holder coaxial with and surrounding said tubular bonnet is rotatably secured thereto. The holder carries driving magnets, preferably rare earth cobalt magnets with an even number of north and south poles. Rotation of the holder results in rotation of the driven magnet assembly. A stepping motor or the like controls the rotation of the driven magnet assembly. A valve stem is connected to the driven magnet assembly in a manner such that turning of the driven magnet assembly shifts the stem which in turn adjusts the valve opening.
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Autoclave Engineers, Inc.
Schwadron Martin P.
Walton G. L.
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