Outboard motor
US6036558A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 1998 |
| Grant date | Mar 14, 2000 |
| Priority date | — |
| Expiry date | Feb 4, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B2075/1816
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An outboard motor generally comprises an engine holder to be mounted to a hull, an engine disposed in an upper portion of the engine holder in a mounted state thereof, an oil pan disposed in a lower portion of the engine holder, and a drive-shaft housing disposed below the oil pan and adapted to house a drive shaft of the engine, in which an exhaust gas from the engine is guided to the drive-shaft housing through an exhaust gas passage and the exhaust gas in the drive-shaft housing is discharged outward through an exhaust release passage connected to the drive-shaft housing at a time of low-speed revolution of the engine such as idling operation. There is further provided a partition wall integrally with an inside portion of the drive-shaft housing so as to divide the inside thereof into an expansion chamber communicated with the exhaust gas passage and a release chamber communicated with the exhaust release passage, and the partition wall has a cutout portion at an upper end portion thereof, through which the expansion chamber and the release chamber are communicated with each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.