Lubrication structure for internal combustion engine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 12, 2019
Grant Date -
Aug 9, 2018
app pub date -
Dec 29, 2017
filing date -
Feb 7, 2017
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A lubrication structure for an internal combustion engine includes a crankcase, an oil pump, and a relief valve. The crankcase is configured by connecting an upper crankcase on a mating surface of a lower crankcase, and has an oil pan. The oil pump and the relief valve are installed in the lower crankcase. The oil pump sucks oil in the oil pan through a suction passage, and discharges the oil into a discharge passage. The relief valve performs a valve-opening operation according to pressure of oil in the discharge passage to return surplus oil in the discharge passage to the suction passage through a surplus passage. These passages are formed in the lower crankcase. A relief valve housing section housing the relief valve, and the surplus passage allowing the relief valve housing section and the suction passage to communicate with each other, are provided to communicate with the mating surface.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2017 Application Filing Year
- F01M Class
- 386 Applications Filed
- 305 Patents Issued To-Date
- 79.02 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- F01M Class
- 0 % this patent is cited more than
- 6 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | May 12, 2027 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | May 12, 2031 |
