Automatic control for variable displacement pump

Details Automatic control for variable displacement pump Automatic control for variable displacement pump

1988-09-14

1990-01-09

Smith, Leonard E.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

60452, F04B 4908

Patent

active

048924652

ABSTRACT:
A control for a variable displacement pump in which a displacement control element is made responsive to a load sensing valve and a pilot pressure relief valve. A control fluid is supplied to the pressure relief valve and the load sensing valve and the control pressure fluid controls the working pressure fluid which operates the stroking piston for the pump.

REFERENCES:
patent: 3865514 (1975-02-01), Lonnemo
patent: 4244678 (1981-01-01), Uehara et al.
patent: 4245962 (1981-01-01), Uehara et al.
patent: 4293284 (1981-10-01), Carlson et al.
patent: 4518322 (1985-05-01), Nonnenmacher
patent: 4523430 (1985-06-01), Masuda
patent: 4631005 (1986-12-01), Warren et al.

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