Multi-pressure compensation of variable displacement pump

Details Multi-pressure compensation of variable displacement pump Multi-pressure compensation of variable displacement pump

1991-01-17

1992-07-28

Bertsch, Richard A.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

417 53, F04B 4900

Patent

active

051336448

ABSTRACT:
A variable displacement pump is controlled throughout a broad range of operating conditions between a maximum pressure, low flow rate combination and a minimum pressure, high flow rate combination even when the pump is driven by a power limited prime mover. Different relief valves set at different operating pressures are automatically selectably connected to a control port of the pump in response to the actual flow rate of the fluid pumped by the pump reaching different flow rate set points.

REFERENCES:
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patent: 3959969 (1976-06-01), Tittmann et al.
patent: 4022021 (1977-05-01), Russell, Jr.
patent: 4123907 (1978-11-01), Bianchetta et al.
patent: 4157233 (1979-06-01), Horiuchi
patent: 4468173 (1984-08-01), Dantlgraber
patent: 4523431 (1985-06-01), Budzich
patent: 4801247 (1989-01-01), Hashimoto et al.
patent: 4958989 (1990-09-01), Frantz

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