Multiple-chamber gear pump with hydraulically connected chambers

Details Multiple-chamber gear pump with hydraulically connected chambers Multiple-chamber gear pump with hydraulically connected chambers

1994-03-22

1995-11-14

Bertsch, Richard A.

Pumps

Motor driven

Electric or magnetic motor

4171991, 4171992, 417435, 417439, 417522, 184 612, 418200, F04B 1700, F04B 2100, F04B 2304, F01C 124

Patent

active

054661315

ABSTRACT:
Pump heads comprising at least two gear-pump chambers are disclosed. Each chamber comprises a housing which defines a corresponding pump cavity. Each cavity contains a driving gear and at least one driven gear and has a separate inlet and outlet. The pump cavities are hydraulically interconnected by a fluid conduit allowing passage whenever the pump chambers are pumping a fluid so as to generate a higher pressure in one cavity relative to the other cavity, of the fluid from the higher-pressure cavity to the lower-pressure cavity sufficient to maintain hydraulic prime of both cavities.

REFERENCES:
patent: 2382042 (1945-08-01), Etnyre
patent: 2750891 (1956-06-01), Berry
patent: 2931303 (1960-05-01), Dlugas
patent: 2993450 (1961-07-01), Weigert
patent: 3272140 (1968-09-01), Curry et al.
patent: 4065235 (1977-12-01), Furlong et al.
patent: 4127365 (1978-11-01), Martin et al.
patent: 5027653 (1991-07-01), Foran, Jr.
patent: 5105911 (1992-04-01), Atkinson
Hobbs et al., "New Methods of Reducing Noise in External Gear Pumps," SAE Technical Paper Series No. 801005 (1980).
Micropump Brochure 001C, "A Guide to Pump and Motor Combinations Pump/Motor Selection Guide and Performance Parameters," (1993).

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