Variable displacement pump control assembly

Details Variable displacement pump control assembly Variable displacement pump control assembly

1974-09-05

1976-03-02

Freeh, William L.

Pumps

Condition responsive control of drive transmission or pump...

60445, F04B 126

Patent

active

039415139

ABSTRACT:
A variable displacement pump control assembly as for an axial piston pump having a swash plate actuating piston characterized in that the control assembly is embodied in the pump housing to provide a pressure compensated pump, or to provide a pressure compensated pump having an auxiliary modulator to control the pressure applied to the swash plate actuating piston to maintain a predetermined pressure drop across a variable area metering orifice embodied as in a directional control valve for a fluid motor, or to provide a pressure compensated pump having a horsepower modulator with or without the auxiliary modulator, said horsepower modulator providing desired control of horsepower in relation to pump delivery pressure and displacement.

REFERENCES:
patent: 2845876 (1958-08-01), Keel
patent: 3067693 (1962-12-01), Lambeck
patent: 3165068 (1965-01-01), Burnham et al.
patent: 3601504 (1971-08-01), McBurnett
patent: 3635021 (1972-01-01), McMillon
patent: 3738779 (1973-06-01), Hein
patent: 3750405 (1973-08-01), Loch

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