Positive-displacement oil pump
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Jan 11, 2005
Grant Date -
Feb 19, 2004
app pub date -
Jan 30, 2003
filing date -
Aug 13, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A positive-displacement oil pump is disclosed. In the oil pump, an insert body is fitted into a central opening of a shaft body to a height of an oil-feeding hole. The insert body is rotated along with the shaft body, and includes a central hole formed in the insert body, a cylindrical lip formed around an outlet of the central hole, a fluid discharge diode provided in an inlet of the central hole, and an inclined groove formed around an outer circumferential surface of the insert body such that the inclined groove forms a closed curve. A piston is movably fitted over the insert body such that the piston is axially moved while changing a volume of a displacement space defined between the insert body and the piston.
First Claim
Other Claims data not available
Family
| Country | kind | publication No. | Filing Date |
|---|---|---|---|
| KR | B1 | KR100451550 | Aug 13, 2002 |
| IT | A1 | ITMI20022649 | Dec 17, 2002 |
| JP | B2 | JP3819360 | Dec 25, 2002 |
International Classification(s)
- 2003 Application Filing Year
- F01M Class
- 157 Applications Filed
- 57 Patents Issued To-Date
- 36.31 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- F01M Class
- 0 % this patent is cited more than
- 20 Age
