Offset three-gear, two-system pump

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

F - Mech Eng,Light,Heat,Weapons

04

C

103/84

F04C 2/18 (2006.01) F04C 2/14 (2006.01)

Patent

CA 1255539

OFFSET THREE-GEAR, TWO-SYSTEM PUMP ABSTRACT: An offset three-gear, two-system pump (10a) includes first (14a), second (20a), and third (24a) overlapping chambers. First inlet (46a) and low-pressure outlet ports (48a) communicate with the first and second chambers, and second inlet (50a) and high-pressure outlet ports (52a) communicate with the first and third chambers. The first chamber has a short wall portion (16a) 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 (28a), second (34a), and third (40a) 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 co- operable 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.

494033

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