Water craft
US5140930A · kind A · utility
26Cited by
4References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 12, 1991 |
| Grant date | Aug 25, 1992 |
| Priority date | — |
| Expiry date | Sep 12, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63B1/20
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A planing hull of a water craft including side keels and a center keep. A downwardly open chamber is defined rearwardly of the center keel and is flanked on either side by the side keels. The chamber confines a cushion of air which supports the hull in the planing mode, air supply to the chamber being wholly via the underside of the hull by being channelled between the keels without the use of air vents which open into the chamber. The absence of air vents provides improved drag at medium and low speeds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.