Gear pump with groove in end wall beginning at outer periphery o

Details Gear pump with groove in end wall beginning at outer periphery o Gear pump with groove in end wall beginning at outer periphery o

1985-12-23

1988-03-08

Croyle, Carlton R.

Rotary expansible chamber devices

Grooved abutting cylinder-rotating member end surfaces

Working fluid portion fills intertooth spaces or spaces...

131184, 131206, F04C 1808, F04C 2908

Patent

active

047297271

ABSTRACT:
A gear pump which includes a pair of intermeshing gears. A housing defines a pumping chamber having peripheral walls surrounding and in sealing contact with the circumference of the gears between an inlet port and a discharge port. Bearing walls are adapted to engage adjacent side faces of the gears in substantially sealing relation. Grooves are provided in the bearing walls for progressively admitting pressure to the gear teeth as the gear teeth move toward the discharge port. The grooves are acruately shaped and diverge toward the discharge port from a point intermediate the inlet and discharge ports and allow compressed air in the liquid to be gradually displaced by liquid under pressure from the pump discharge.

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