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

Bypass or relief valve controls venting by movable pump...

417299, 417310, F04B 4902, F04B 4908

Patent

active

044707622

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 flow from the pumping chambers is partially bypassed through a bypass passage formed between the cam ring and the pump thrust plate. The bypass passage is urged to the open position by a bypass spring which urges separation between the cam ring and the thrust plate. The pressure plate of the pump responds to system pressure or demand to urge the cam ring into abutment with the thrust plate thereby reducing the opening and decreasing the bypass flow.

REFERENCES:
patent: 2193244 (1940-03-01), Wolcott
patent: 2362724 (1944-11-01), Shea
patent: 3930759 (1976-01-01), Drutchas

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