Power limiting control apparatus for pressure-flow compensated v

Details Power limiting control apparatus for pressure-flow compensated v Power limiting control apparatus for pressure-flow compensated v

1979-10-09

1981-10-06

Croyle, Carlton R.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

60450, F04B 4908

Patent

active

042932840

ABSTRACT:
Control apparatus 24 for use with a pressure-flow compensated variable displacement pump assembly 10 for saving energy by limiting the power output of the pump 12 to the load requirements, or to the pump drive capacity, comprising a pressure regulated variable orifice means 52 through which the pumped fluid to load flows, the orifice means being responsive to changes in pressure of the pumped fluid from the pump assembly to vary inversely the effective area of the orifice means, the flow compensator 28 of the pump assembly functioning to hold the pressure drop across the orifice means constant so that the flow across the orifice means also varies inversely with the pressure to limit to a preselected value the horsepower supplied by the pump assembly to load.

REFERENCES:
patent: 3067693 (1962-12-01), Lambeck
patent: 3379133 (1968-04-01), McCormick
patent: 3635021 (1972-01-01), McMillen et al.
patent: 3820920 (1974-06-01), Klimaszewski et al.
patent: 4067664 (1978-01-01), Robeller

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