Pumps with servo-type actuation for cheek plate unloading

Details Pumps with servo-type actuation for cheek plate unloading Pumps with servo-type actuation for cheek plate unloading

1976-07-08

1977-10-25

Croyle, Carlton R.

Pumps

Processes

417 87, 417283, 417300, 417310, 418133, 418135, F04B 4902

Patent

active

RE0294560

ABSTRACT:
The pressure acting on a pressure loaded cheek plate in a pump is selectively vented by a servo valve actuated by the buildup of pressure in the pump outlet caused by normal parasitic losses in a downstream hydraulic flow circuit. Since it may be desirable to actuate the servo valve by the pressure drop across an orifice in the outlet line or by a suitable orifice in the pump return to pump, both embodiments are disclosed as exemplary means for achieving the premises of this design.

REFERENCES:
patent: 2800083 (1957-07-01), Tweedale et al.
patent: 2923244 (1960-02-01), Dudley
patent: 3578888 (1971-05-01), Adams
patent: 3728046 (1973-04-01), Clark et al.

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