Variable displacement pumps

Details Variable displacement pumps Variable displacement pumps

1989-10-27

1991-11-12

Bertsch, Richard A.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

F04B 126

Patent

active

050643517

ABSTRACT:
A rotary, variable-displacement hydraulic pump (1) in use driven by a prime mover (4), the pump (1) comprising control means (5) for varying the displacement of the pump and means (17) responsive to a signal related to the rotational speed of the pump and operable to override the control means so as, in use, to prevent stalling of the prime mover (4) within a predetermined operational range of the prime mover.

REFERENCES:
patent: 3230699 (1966-01-01), Hann et al.
patent: 3416452 (1968-12-01), Misulis
patent: 3563675 (1971-02-01), Straznickas
patent: 3785754 (1974-01-01), Miller
patent: 4398869 (1983-08-01), Kirkham et al.
patent: 4474104 (1984-10-01), Creffield
patent: 4578019 (1986-03-01), Safarik
patent: 4600364 (1986-07-01), Nakatani et al.
patent: 4718825 (1988-01-01), Avery

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