Title:
ギアポンプ形成方法および装置
Document Type and Number:
Japanese Patent JP3988959
Kind Code:
B2
Abstract:
A method and apparatus 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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Inventors:
Stephen Jay Brown
VJP Shah
VJP Shah
Application Number:
JP27455096A
Publication Date:
October 10, 2007
Filing Date:
October 17, 1996
Export Citation:
Assignee:
CATERPILLAR INCORPORATED
International Classes:
F04C2/18; F04C2/08; F04C15/00
Domestic Patent References:
| JP6066265A | ||||
| JP63022390U | ||||
| JP2045670A | ||||
| JP59153993A | ||||
| JP48014687U |
Attorney, Agent or Firm:
Minoru Nakamura
Fumiaki Otsuka
Shishido Kaichi
Nobuo Ogawa
Fumiaki Otsuka
Shishido Kaichi
Nobuo Ogawa