Marine propulsion system and method
US9884671B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Jun 6, 2012 |
| Grant date | Feb 6, 2018 |
| Priority date | — |
| Expiry date | Feb 20, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/85978
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A method for propulsion of a marine vessel, a liquid-directing system and a marine propulsion system are presented. Water-directing scoops are moved in a rearward direction while the scoops are dipping into the water. The scoops may be arranged about a hub. Water is scooped using a bottom edge and lower sides of each of the scoops. Each scoop has an open-faced concave interior and directs scooped water towards a centerline and towards a water exit region of the scoop. The water exit region remains above the local or apparent waterline while the water is scooped, directed and ejected. Water is ejected from the water exit region of the scoop in the rearward direction and at a relative exit velocity that is greater than a relative entrance velocity of water being scooped. Rearward ejection of the water expresses a forward thrust of the propulsion system. Other liquids may be used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.