Hydraulic motor/pump with variable mechanical advantage

Details Hydraulic motor/pump with variable mechanical advantage Hydraulic motor/pump with variable mechanical advantage

1979-09-06

1982-01-05

Freeh, William L.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

417399, 417461, F04B 106

Patent

active

043091520

ABSTRACT:
The invention is an efficient hydraulic motor/pump whose mechanical advantage can be varied while it is operating. Preferred embodiments described include a multi-cylinder reciprocation motor/pump, a variable level power extraction system used with a wave generator, a hydraulic transformer and a hydraulic autotransformer.

REFERENCES:
patent: 1072718 (1913-09-01), Heindl
patent: 1902345 (1933-03-01), Valentine
patent: 2755966 (1956-07-01), Lindars
patent: 2762307 (1956-09-01), Orloff
patent: 3972268 (1976-08-01), Freeman
patent: 4028014 (1977-06-01), Cocks
patent: 4077213 (1978-03-01), Hagen

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