Valves and valve actuation – Fluid actuated or retarded – Pilot or servo type motor
Patent
1979-10-31
1981-12-15
Chambers, A. Michael
Valves and valve actuation
Fluid actuated or retarded
Pilot or servo type motor
251 44, 251282, 137491, 1374925, 137495, F16K 31383, F16K 3140
Patent
active
043055664
ABSTRACT:
A normally open, two stage solenoid actuated flow control valve having a pressure relief function, in which a poppet assembly comprising a spring biased poppet, a range spring and a spring adjusting screw, controls the communication of balancing fluid pressure to a primary valve member. The adjustment screw includes an axial extending shaft engageable with an externally extending adjustment stem; rotation of the stem effects concurrent rotation and axial displacement of the adjusting screw within the poppet sleeve. An armature is disposed in axial alignment with and intermediate the stem and the poppet assemby so that the poppet assembly can be driven to engagement with its associated seat by the actuation of the solenoid or by the direct axial displacement of the adjustment stem.
REFERENCES:
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patent: 3977649 (1976-08-01), Zeuner et al.
patent: 4073464 (1978-02-01), Hansen et al.
"Solenoid Operated Cartridge Valves", Wayland A. Tenkku, 9/77
Chambers A. Michael
Fluid Controls Inc.
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