Oil return to the sump of a flat engine
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United States of America Patent
Stats
-
Apr 12, 2016
Grant Date -
Aug 7, 2014
app pub date -
Feb 4, 2014
filing date -
Feb 4, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Returning engine oil to the primary oil sump from outboard locations in a flat engine can be a challenge. In the present disclosure, the pressure fluctuations occurring at the underside of the piston, due to reciprocation of the piston, are used to pump the oil from outboard locations to the primary oil sump. To prevent backflow of oil during periods of negative pressure difference, a check valve is placed in the oil drain passage. The check valve allows flow from the outboard location to the primary oil sump and no flow from the primary oil sump to the outboard location by opening and closing as driven by pressure fluctuations due to piston reciprocation. Such a check valve also prevents backflow of the oil to one of the outboard locations when the engine is tilted.
First Claim
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International Classification(s)
- 2014 Application Filing Year
- F01M Class
- 274 Applications Filed
- 233 Patents Issued To-Date
- 85.04 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- F01M Class
- 0 % this patent is cited more than
- 9 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Oct 12, 2027 |
