Power plants – Pressure fluid source and motor – Condition responsive control of pump or motor displacement
Patent
1975-03-19
1976-10-12
Geoghegan, Edgar W.
Power plants
Pressure fluid source and motor
Condition responsive control of pump or motor displacement
91446, 91462, 137596, 13762512, F16H 3946
Patent
active
039849791
ABSTRACT:
A load responsive direction and flow control valve for use in fluid power load responsive system. The valve maintains a selected constant flow level for control of both positive and negative loads, irrespective of the change in the load magnitude or change in the fluid pressure, supplied to the valve. When controlling positive or negative loads the valve maintains a constant pressure differential across a flow control metering orifice utilizing a single control slide member, first by throttling fluid entering the inlet chamber and then by throttling the fluid leaving the outlet chamber. The valve may be used with fixed displacement pumps, fixed displacement pumps equipped with differential pressure relief valves, with variable displacement pumps equipped with pressure compensators and variable displacement pumps equipped with differential pressure compensators.
REFERENCES:
patent: 3285282 (1966-11-01), Martin
patent: 3455210 (1969-07-01), Allen
patent: 3470694 (1969-10-01), Budzich
patent: 3488953 (1970-01-01), Haussler
patent: 3730219 (1973-05-01), Tennis
patent: 3744517 (1973-07-01), Budzich
patent: 3807443 (1974-04-01), Jacobs
patent: 3807447 (1974-04-01), Masuda
patent: 3858393 (1975-01-01), Budzich
Geoghegan Edgar W.
Hogg William N.
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