Rotary hydraulic device

Details Rotary hydraulic device Rotary hydraulic device

1979-09-28

1981-09-15

Croyle, Carlton R.

Pumps

With condition responsive pumped fluid control

Fluid flow rate responsive

417310, F04B 4900

Patent

active

042894549

ABSTRACT:
A rotary hydraulic device in which a pair of delivery ports of a vane pump communicate with independently separated delivery chambers, respectively, and the communication between one of the delivery chamber and a hydraulic machine is shut off after the flow rate of delivery fluid from the delivery port exceeds a certain level with the increase in the speed of rotation of the pump. The excess fluid from the delivery port is returned to the tank side which causes the decrease of the supply flow rate in the zone of high speed rotation of the pump and also the reduction of power consumption so that the rotary hydraulic device of the invention is especially suitable for the power steering devices of vehicles.

REFERENCES:
patent: 3433240 (1969-03-01), Lehmann
patent: 3671143 (1972-06-01), Clark
patent: 3953153 (1976-04-01), Huber et al.

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