Power plants – Pressure fluid source and motor – Having condition responsive control in a system of distinct...
Patent
1975-03-03
1978-05-16
Geoghegan, Edgar W.
Power plants
Pressure fluid source and motor
Having condition responsive control in a system of distinct...
60426, 60468, 60486, 91412, F15B 1800
Patent
active
040891666
ABSTRACT:
A control system for plural circuits having motor-driven hydraulic pumps. As disclosed, a pair of pumps is connected in a hydraulic actuating circuit individual to that pair and the circuit includes an hydraulically operated actuator to be advanced and retracted by fluid under pressure delivered from the pair of pumps of that circuit. A single prime mover drives the pair of pumps and pumps in other circuits, and each circuit has a pressure-responsive control valve which provides for unloading a pump of the first circuit in response to increases in pressure in the various other circuits to a predetermined value at which, in the absence of such unloading, the input horsepower requirement has risen toward a value which would stall the prime mover.Pumps in several of the circuits may be sequentially and selectively unloaded.
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patent: 3868821 (1975-03-01), Ratliff et al.
patent: 3916767 (1975-11-01), Barton
patent: 3924971 (1975-12-01), Jacquot
McBurnett James R.
Ratliff Frank W.
Geoghegan Edgar W.
Lindrooth Charles H.
Tyrone Hydraulics Inc.
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