Marine propeller with speed sensitive venting
US7762772B1 · kind B1 · utility
8Cited by
6References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2007 |
| Grant date | Jul 27, 2010 |
| Priority date | — |
| Expiry date | May 26, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63H1/20
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A marine propeller is provided with a valve that progressively blocks exhaust flow into aerating relation with the blades of the propeller as the propeller rotational speed increases. A piston within a housing moves radially outwardly, in response to centrifugal forces, as the propeller increases in rotational speed. This movement progressively blocks an aperture that allows the flow of exhaust gas into the region of the propellers. In certain embodiments, a secondary flow path is allowed even when the piston has moved to its extreme outward radial position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.