Propulsion device
US12365433B2 · kind B2 · utility
0Cited by
6References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2020 |
| Grant date | Jul 22, 2025 |
| Priority date | — |
| Expiry date | Mar 24, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63B79/40
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A wingsail for a powered watercraft comprising a first aerofoil element, a second aerofoil element, and a third aerofoil element, wherein each of the aerofoil elements is rotatable about an axis and has an aerofoil section with a centre of area which is closer to its leading edge than its trailing edge, and the aerofoil elements are movable to a configuration in which flow from the trailing edge of one of the first or third element is directed toward the leading edge of the second element, and flow from the trailing edge of the second element is directed toward the leading edge of the other of the first or third element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.