Exhaust device for outboard motor
US4881370A · kind A · utility
5Cited by
4References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 2, 1988 |
| Grant date | Nov 21, 1989 |
| Priority date | — |
| Expiry date | Feb 2, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B61/045
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An improved exhaust system and bearing arrangement for a small displacement outboard motor that is rotatable through substantially 360 degrees for reverse operation. The drive shaft housing is formed with a reduced diameter cylindrical portion that is journaled within the swivel bracket by a bearing arrangement comprised of plastic elements and O-ring elements. The engine has an exhaust system with an exhaust pipe that at least in part encircles the drive shaft and which extends into the drive shaft housing below at least one the bearings to provide sufficient length for tuning and to avoid undue heating of the bearing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.