Load responsive hydraulic system

Details Load responsive hydraulic system Load responsive hydraulic system

1977-07-18

1980-04-22

Cohen, Irwin C.

Power plants

Pressure fluid source and motor

Condition responsive control of pump or motor displacement

60452, 91 6, 91 31, 13759613, F15B 1304, F15B 1306

Patent

active

041988221

ABSTRACT:
Each directional control valve of a load responsive hydraulic system supplies a flow of signal fluid to a work port channel thereof and pressurizes this flow of signal fluid to a predetermined pressure magnitude above the load actuating pressure in the work port channel to provide a synthetic signal pressure. Fluid logic is provided for the selection of the highest synthetic signal pressure from any of the directional control valves and for application of this highest synthetic signal pressure to an effective output operator for the control of the pressure and effective output of the pump.

REFERENCES:
patent: 3693506 (1972-09-01), McMillen et al.
patent: 3847180 (1974-11-01), Kroth et al.
patent: 3878864 (1975-04-01), Schurger
patent: 3902401 (1975-09-01), Allen et al.
patent: 3971216 (1976-07-01), Miller
patent: 4028889 (1977-06-01), Budzich

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