Control systems for variable capacity hydraulic machines

Details Control systems for variable capacity hydraulic machines Control systems for variable capacity hydraulic machines

1975-11-17

1978-03-07

Freeh, William L.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

91506, F04B 126, F01B 1304

Patent

active

040777448

ABSTRACT:
A pump is provided with a regulating device which includes a valve and a motor. The motor operates on the pump to vary the capacity thereof. Movement of the motor is controlled by the valve which has a spool and a body. A feedback link is provided between the motor and the body so that movement of the motor due to a displacement of the spool moves the body to return the valve to neutral. Hunting of the transmission is thus reduced.

REFERENCES:
patent: 2945449 (1960-07-01), Le Fabvre et al.
patent: 2971498 (1961-02-01), Bloch
patent: 3232238 (1966-01-01), Faisandier
patent: 3407738 (1968-10-01), Bosch
patent: 3588286 (1971-06-01), Skinner
patent: 3635021 (1972-01-01), McMillen
patent: 3669570 (1972-06-01), Himmler
patent: 3694108 (1972-09-01), Pensa
patent: 3861832 (1975-01-01), Pinson

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