Gear pump and method of making same

Details Gear pump and method of making same Gear pump and method of making same

2006-01-31

2006-01-31

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Relatively movable working member and drive shaft axes

C418S206100, C418S206400

Reexamination Certificate

active

06991442

ABSTRACT:
An improved high pressure intermeshing gear pump that achieves high efficiency and a low cost by forming the pumping cavity such that no fillets exist at the corners permitting closed fits without utilizing bearing end plates. In addition an improved coupling between the gears and their supporting shafts is disclosed as is a simplified machining method that eliminates burrs that may be formed during the drilling operations.

REFERENCES:
patent: 1541435 (1925-06-01), Reller
patent: 2655108 (1953-10-01), Osborne
patent: 3263425 (1966-08-01), Rohde
patent: 3286643 (1966-11-01), Andrews et al.
patent: 3704968 (1972-12-01), Haupt
patent: 5791143 (1998-08-01), Glomeau
patent: 6210138 (2001-04-01), Cortez
patent: 183311 (1955-09-01), None
patent: 265576 (1927-08-01), None
patent: 08-93653 (1996-08-01), None

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