Boat propulsion unit with a propulsion propeller arranged under the boat's bottom
US5397255A · kind A · utility
10Cited by
7References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 28, 1994 |
| Grant date | Mar 14, 1995 |
| Priority date | — |
| Expiry date | Feb 28, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63H2025/425
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A boat propulsion unit has a propeller which can be withdrawn into a sleeve to a position above the plane of the boat's bottom and enclosed by a cover plate. The water in the closed sleeve can be pumped out, so that the emptied sleeve is accessible for inspection and maintenance operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.