Personal watercraft center keel
US7240632B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2003 |
| Grant date | Jul 10, 2007 |
| Priority date | — |
| Expiry date | Jun 25, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63H11/08
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A personal watercraft having improved bottom hull shapes in general, and improved center keel shapes in particular. The center keel can have a substantial section over which the keel angle becomes sharper progressing from front to rear, and the concavities on either side of the center keel become deeper progressing from front to rear. The center keel can have a point of maximum downward slope on either side of the keel centerline, with the maximum vertically downward slope becoming greater with greater rearward distance over a section of the personal water craft bottom hull. The bottom hull can have keel troughs on either side of the keel centerline that become deeper over a section of the personal watercraft bottom hull, traveling from front to rear over that selected section of personal watercraft bottom hull. The center keel shape can provide a smoother ride and improved handling in rough water. When the bottom hull is in the water, the sharper keel angle and deeper troughs leading to the transition region and the tunnel of the watercraft can more effectively channel water to the tunnel and to the jet pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.