Marine propeller with addendum
US4865520A · kind A · utility
12Cited by
7References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1988 |
| Grant date | Sep 12, 1989 |
| Priority date | — |
| Expiry date | Oct 6, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63H2001/185
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A marine propeller (4) has a plurality of blades (12, 13, 14, and 15) each with an integral addendum (34) extending rearwardly from the trailing edge (30) of the positive pressure surface (26) of the blade. A particular combination of blade area ratio and blade rake is provided to enable quick acceleration to a high-speed on-plane condition in blade surfacing racing applications, and without bobbing up and down. The blade area ratio is at least 40%, and the blade rake is 10.degree. to 25.degree..
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.