Hydraulic control valve

Details Hydraulic control valve Hydraulic control valve

1976-05-26

1977-07-26

Geoghegan, Edgar W.

Power plants

Pressure fluid source and motor

Condition responsive control of pump or motor displacement

60450, 60452, 13762568, F16H 3946

Patent

active

040374106

ABSTRACT:
A hydraulic control valve in a closed-center load responsive system having a passage with a check valve therein downstream of the inlet metering and signal passage allowing flow from the signal passage to the load prior to connecting the pressure circuit to the load circuit so as to relieve fluid from the signal circuit to the load circuit as the signal circuit attains a pressure higher than the existing load thus causing flow past the inlet metering whereby the pressure differential in the metering compensates the pump.

REFERENCES:
patent: 3401521 (1968-09-01), Plate
patent: 3486334 (1969-12-01), Miller
patent: 3508847 (1970-04-01), Martin
patent: 3754400 (1973-08-01), Parquet
patent: 3777492 (1973-12-01), Boydell et al.

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