Four-stroke internal combustion engine for outboard motors
US4523556A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 16, 1984 |
| Grant date | Jun 18, 1985 |
| Priority date | — |
| Expiry date | Jul 16, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B2075/027
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Two embodiments of lubricating systems for the four cycle engine of an outboard motor, each of which embodies a lubricant sump that is disposed beneath the engine and to which lubricant is returned by gravity. In each embodiment, a buffer volume is provided that receives lubricant when the engine is oriented in other than a desired position so that the oil will flow into this buffer volume rather than being discharged from the sump. The lubricant is returned to the engine from the buffer volume when the engine is again placed in its normal orientation. In one embodiment of the invention, the buffer volume is provided by the camshaft chamber of the engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.