Keels of craft
US4993342A · kind A · utility
5Cited by
3References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 27, 1989 |
| Grant date | Feb 19, 1991 |
| Priority date | — |
| Expiry date | Jun 27, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63B41/00
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The craft incorporates a keel (3) essentially constituted by an elongated capacity (4) formed out of a flexible or resilient material which is distortable and watertight. A water inlet opening (6) is provided in the wall of this elongated capacity (4) oriented towards the bow of the craft and maintained in the open condition, in order to have the water back pressure prevailing in this elongated capacity (4) as soon as the craft is moving in the forward direction, said elongated capacity (4) being then at least partially filled with water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.