Sail with retractable air directing element
US4563970A · kind A · utility
10Cited by
6References
6Claims
0Family size
Inventor
Key dates
| Filing date | Jun 3, 1983 |
| Grant date | Jan 14, 1986 |
| Priority date | — |
| Expiry date | Jun 3, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63H9/0635
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A sailset comprising a leading aerofoil and a trailing aerofoil that pivots about an axis passing through the leading aerofoil. A third comparatively small aerofoil is retractable within the leading aerofoil and extendable downwind of the trailing edge of the leading aerofoil to provide a surface overlapping the leading edge of the trailing aerofoil. Guides for the third aerofoil are preferably provided for both its leading and trailing edges, the guides comprising roller and roller tracks and/or sliding pivots.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.