Servo-valve convertible construction

Details Servo-valve convertible construction Servo-valve convertible construction

1979-09-24

1981-10-06

Cohen, IrwinC.

Power plants

Pressure fluid source and motor

Condition responsive control of pump or motor displacement

60452, 417218, 417222, F04B 126, F04B 4908, F16H 3946

Patent

active

042928052

ABSTRACT:
A hydraulic system includes an actuator and a motor driven pump. A servo-control valve adjusts the displacement of the pump and provides a stable response to pump output pressure variations. The servo-valve is adapted for the addition of a control piston which operates against the spool of the servo-valve to modulate its operation in response to a moderate pressure drop across a restriction placed in the line from the pump to the actuator.

REFERENCES:
patent: 2238061 (1941-04-01), Kendrick
patent: 3246471 (1966-04-01), Goodale
patent: 3486334 (1969-12-01), Miller
patent: 3549281 (1970-12-01), Schink et al.
patent: 3635021 (1972-01-01), McMillen et al.
patent: 3768928 (1973-10-01), Miller et al.
patent: 3856436 (1974-12-01), Lonnemo
patent: 3935706 (1976-02-01), Stevens
patent: 4132506 (1979-01-01), Dantigraber

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