Closed loop control circuit for variable hydraulic pump

Details Closed loop control circuit for variable hydraulic pump Closed loop control circuit for variable hydraulic pump

1992-10-23

1994-07-05

Bertsch, Richard A.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

60445, F04B 4900

Patent

active

053262301

ABSTRACT:
Closed loop control circuit for a variable hydraulic pump the output flow of the pump being variable by control means and the pump including at least two closed loop controllers actuating the control means, wherein at least one hydraulic switching element is provided which automatically connects to the control means the closed loop controller providing the highest or the lowest pressure.

REFERENCES:
patent: 3214911 (1965-11-01), Kempson
patent: 4065922 (1978-01-01), Ott et al.
patent: 4129987 (1978-12-01), Blume
patent: 4244678 (1981-01-01), Uehara et al.
patent: 4401182 (1983-08-01), Pollman
patent: 4408453 (1983-10-01), Westveer
patent: 4710106 (1987-12-01), Iwata et al.
patent: 5096926 (1991-09-01), Deininger et al.
patent: 5101628 (1992-04-01), Yoshino
patent: 5160295 (1992-11-01), Geringer

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