Demand responsive hydraulic pump

Details Demand responsive hydraulic pump Demand responsive hydraulic pump

1983-03-09

1984-09-11

Gluck, Richard E.

Pumps

With condition responsive pumped fluid control

Normally open bypass or relief passage closed by increased...

417310, F04B 4908, F04B 4902

Patent

active

044707649

ABSTRACT:
A hydraulic power steering system has a vane type pump which is operable to supply fluid to a power steering gear at a volumetric rate determined in part by the system pressure or system demand. The pump flow is partially bypassed through a valve member which is slidably disposed in the thrust plate of the pump. The thrust plate has a bypass aperture which communicates between the pump discharge and the pump inlet. The valve member is spring loaded to permit fluid communication through the apertures and is pressure biased by increasing system pressure to reduce the bypass flow and thereby increase system discharge flow.

REFERENCES:
patent: 2193244 (1940-03-01), Wolcott
patent: 2362724 (1944-11-01), Shea

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