Gear pump valving system

Details Gear pump valving system Gear pump valving system

1991-09-26

1993-08-17

Bertsch, Richard A.

Pumps

With condition responsive pumped fluid control

Pressure responsive relief or bypass valve

417310, 417440, F04B 4900, F04B 2300

Patent

active

052363171

ABSTRACT:
A gear pump having a bypass valve within its port end cover is disclosed. The bypass valve is spring biased to open, pressure to close, rather than being pressure compensated, preventing hydraulic fluid from being "bled off" during the entire work cycle. A butterfly type structure is utilized for the dry valve which is attached to the inlet of the gear pump thus eliminating the need for a cumbersome device for actuating same.

REFERENCES:
patent: 3427981 (1969-02-01), Jansson
patent: 3698839 (1972-10-01), Distefano
patent: 4029290 (1977-06-01), Karpenko
patent: 4597556 (1986-07-01), Sandling
patent: 4813749 (1989-03-01), Cilles
patent: 4890645 (1990-01-01), Anderson

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