Hydraulic pump control system

Details Hydraulic pump control system Hydraulic pump control system

1974-10-18

1976-02-03

Wood, Jr., M. Henson

Motor vehicles

Motor as source of power for other machine

Other machine is mounted by three point hitch

180 792R, 60405, B62D 508

Patent

active

039359174

ABSTRACT:
The disclosure relates to a control system for hydraulic pumps driven by the engine of a vehicle or the like and used for operating an auxiliary mechanism such as a vehicle mounted implement, a power steering system or the like. The disclosed system includes means for interrupting the flow of operating fluid to the pump during periods of time when the output of the pump is not required. With the pump inlet closed, all of the hydraulic fluid on the suction side is immediately pumped out the pump discharge, leaving only a small amount of residual oil on the surface of the working parts to provide lubrication. A valve is provided to prevent fluid from returning to the pump because of downstream pressure in the circuit. Control means, utilizing pressure downstream from the pump, for operating the valve in the inlet of the pump are disclosed.

REFERENCES:
patent: 3280557 (1966-10-01), Sattavara
patent: 3407894 (1968-10-01), Thompson
patent: 3424262 (1969-01-01), Kunz
patent: 3434282 (1969-03-01), Shelhart
patent: 3696613 (1972-10-01), Goodale
patent: 3747725 (1973-07-01), Feustel

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