Offset three-gear, two-system pump

Details Offset three-gear, two-system pump Offset three-gear, two-system pump

1984-11-26

1989-03-28

Croyle, Carlton R.

Rotary expansible chamber devices

Interengaging rotating members

Three or more

417283, F04C 224, F04B 4900

Patent

active

048159549

ABSTRACT:
An offset three-gear, two-system pump includes first, second, and third overlapping chambers. First inlet and low-pressure outlet ports communicate with the first and second chambers, and second inlet and high-pressure pressure outlet ports communicate with the first and third chambers. The first chamber has a short wall portion extending from the low-pressure outlet port to the second inlet port, and a long wall portion extending from the high-pressure outlet port to the first inlet port. First, second, and third gears are respectively rotatable in the chambers. The first and second gears form a low-pressure gear set, and the first and third gears form a high-pressure gear set. A small number of first gear teeth are cooperable with the short wall portion and a large number of first gear teeth are cooperable with the long wall portion to effect sealing against leakage from the pressure ports to the inlet ports.

REFERENCES:
patent: 1585731 (1926-05-01), Oakes
patent: 3447422 (1969-06-01), Bidlack et al.
patent: 3627455 (1971-12-01), Nasvytis
patent: 3639088 (1972-02-01), Moog, Jr.
patent: 4184808 (1980-01-01), Cobb
patent: 4204811 (1980-05-01), Carter et al.

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