Gear pump

Details Gear pump Gear pump

1995-07-07

1997-04-29

Freay, Charles G.

Rotary expansible chamber devices

Interengaging rotating members

Like rotary members

F01C 118

Patent

active

056242514

ABSTRACT:
Problematic noise levels in a hydraulic gear pump are overcome by exerting a radial force on the two shafts with which the gears are associated. The force has a direction and a strength that will combine with the resultant of the pressure forces and gear tooth contact forces, thereby eliminating backlash between the teeth. The system can be mechanical or hydraulic, and is incorporated either into the pump body or into pressure-balanced bearing blocks.

REFERENCES:
patent: 1783209 (1930-12-01), Wilsey
patent: 3995975 (1976-12-01), Bosch
patent: 4682938 (1987-07-01), Riordan
patent: 4909714 (1990-03-01), Cheng

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