Electrohydraulic flow control apparatus

Details Electrohydraulic flow control apparatus Electrohydraulic flow control apparatus

1979-01-22

1980-12-02

Cohan, Alan

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

137489, F16K 1110

Patent

active

042366909

ABSTRACT:
This invention relates to an electrically controlled flow control valve in which it is possible for the pilot fluid pressure which controls the main metering spool to build to full inlet pressure if necessary to initiate movement of the spool. An electrically operated solenoid operates a control poppet which regulates the pressure of the pilot fluid to position the metering spool.

REFERENCES:
patent: 2747607 (1956-05-01), Adams
patent: 2896588 (1959-07-01), Hayner
patent: 3083722 (1963-04-01), Dalder
patent: 3537467 (1970-11-01), Marshall

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