Air-cooled four-stroke internal combustion engine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 9, 2005
Grant Date -
Oct 21, 2004
app pub date -
Apr 21, 2004
filing date -
Apr 21, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention provides an air-cooled four-stroke internal combustion engine capable of achieving a high degree of cooling. The present invention is directed to an air-cooled four-stroke internal combustion engine including a crankshaft and a fan rotor rotatably driven by the crankshaft to generate cooling air for cooling the engine. The engine comprises an oil pan disposed below the crankshaft. A space formed below the oil pan extends in the axial direction of the crankshaft along the lower surface of the oil pan and allows a cooling air to pass therethrough. An upstream portion of the lower surface is inclined upward, toward the upstream, in a vertical section taken along the axis of the crankshaft to receive the cooling air therein.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2004 Application Filing Year
- F02F Class
- 131 Applications Filed
- 43 Patents Issued To-Date
- 32.83 % Issued To-Date
