Metal working – Method of mechanical manufacture – Prime mover or fluid pump making
Patent
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.
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Brown Steven J.
Shah Vijay P.
Bryant David P.
Burrows J. W.
Butler Marc W.
Caterpillar Inc.
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