Valves and valve actuation – Fluid actuated or retarded – Flexible wall expansible chamber reciprocating valve actuator
Patent
1977-06-08
1980-04-15
Cohen, Irwin C.
Valves and valve actuation
Fluid actuated or retarded
Flexible wall expansible chamber reciprocating valve actuator
137554, 123119A, F16K 31165, F16K 3700, F02M 2506
Patent
active
041980301
ABSTRACT:
A fluid operated valve positioner having an actuator unit provided with a flexible diaphragm carrying a main valve member to position the same relative to its main valve seat in a valve unit in relation to the actuated position of the diaphragm, the actuating unit having a range spring acting on one side of the diaphragm and a fluid pressure chamber for receiving fluid pressure to act on the other side of the diaphragm. The actuating unit carries a position sensing member for sensing the position of the diaphragm. A tubular sleeve adjustably carries the sensing member and has a part thereof acting against the range spring to calibrate the same, the actuator unit having a tubular portion telescopically receiving the tubular sleeve therein and in an adjustable manner to calibrate the range spring and thereafter being fastened to the tubular sleeve to hold the tubular sleeve in its calibrated position.
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Caldwell Richard F.
Jackson Byron L.
Chambers A. Michael
Cohen Irwin C.
Robertshaw Controls Company
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