Method and apparatus for producing a gear pump

Details Method and apparatus for producing a gear pump Method and apparatus for producing a gear pump

1995-10-18

2000-07-25

Bryant, David P.

Metal working

Method of mechanical manufacture

Prime mover or fluid pump making

29557, 29558, 29434, B23P 1500

Patent

active

060922834

ABSTRACT:
A method is provided for producing a gear pump/motor in a low cost and efficient manner that can effectively operate in air entrained oil without emitting undesirable noises. This is accomplished by providing bleed slots in a housing adjacent an outlet passage at a location that allows first and second intersecting cavities to be machined with the same boring tool. The bleed slots have a length defined by the distance between two adjacent teeth of first and second intermeshing gears and a cross-sectional area at the mid-point of the arcuate length that is defined by multiplying the flow of the pump at a given RPM time a derived constant. The machining of the body of the gear pump/motor is accomplished in a low cost and efficient manner to produce a gear pump/motor that operates in air entrained oil without emitting undesirable noises.

REFERENCES:
patent: 3661480 (1972-05-01), Forschner et al.
patent: 3893816 (1975-07-01), Payne
patent: 4098032 (1978-07-01), Olbert
patent: 4231726 (1980-11-01), Cobb et al.
patent: 4334840 (1982-06-01), Teruyama
patent: 4355964 (1982-10-01), Rodibaugh et al.
patent: 4682938 (1987-07-01), Riordan
patent: 4974318 (1990-12-01), Heppekausen et al.
patent: 5084964 (1992-02-01), Cyphers
patent: 5638600 (1997-06-01), Kao et al.

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