Motorcycle engine cam chest having reed valve assembly
US6457449B1 · kind B1 · utility
18Cited by
8References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2001 |
| Grant date | Oct 1, 2002 |
| Priority date | — |
| Expiry date | Jul 11, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01M1/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A motorcycle engine includes a crankcase, a cam chest, and a separating wall between the crankcase and cam chest. An opening is defined in the wall and communicates between the cam chest and crankcase. A valve assembly, which is preferably a reed valve assembly, covers the opening and permits one-way flow of air from the crankcase into the cam chest in response to pressure differentials caused by reciprocation of the engine's pistons. The air is then forced into the engine's rocker boxes through the engine's pushrod tubes and forces oil in the rocker boxes to return to the crankcase through narrow oil drainback passages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.