Title: Hydraulic pump control system

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.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Eley, James M. (Corinth, MS, US)
Joyce, Arthur B. (Corinth, MS, US)

Application Number: 515990
Filing Date: 1974-10-18
Publication_date: 1976-02-03
Assignee: Tyrone Hydraulics, Inc. (Corinth, MS)
Primary Class(es): 180/53.4 60/405, 60/459
Other Classes:
US Patent Ref:

3280557	Oct, 1966	Sattavara	180/79.
3407894	Oct, 1968	Thompson	180/53.
3424262	Jan, 1969	Kunz	180/79.
3434282	Mar, 1969	Shelhart	60/405.
3696613	Oct, 1972	Goodale	60/404.
3747725	Jul, 1973	Feustel	180/79.

Other Refs:
Primary Examiner: Wood, Jr., M. Henson
Assistant Examiner: Siemens, Terrance L.
Attorney: Synnestvedt & Lechner