Rotary expansible chamber devices – Methods
Patent
1990-04-13
1991-12-31
Vrablik, John J.
Rotary expansible chamber devices
Methods
418102, 418132, 418135, 418189, F04C 218, F04C 1500
Patent
active
050767704
ABSTRACT:
A gear pump having improved low-temperature operation includes a housing with a cavity wherein is rotatably received a pair of meshed pinion gears. A pair of bushing members matched in external shape to a projection of the pair of gears and complementary to the housing cavity alone journal the pair of gears. The bushings and gears are freely movable relative to the housing at all operating temperatures for the pump, and the bushings are urged by fluid pressure forces into sealing cooperation with the gears and with the housing. The pump achieves an improved pumping volume by directing a trapped intermesh volume to the outlet port of the pump.
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Cannon Dennis L.
Dabling G. Arlan
Allied-Signal Inc.
Holden Jerry J.
Miller Terry L.
Vrablik John J.
Walsh Robert A.
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