Varible outhaul wishbone boom for board sailor
US4674428A · kind A · utility
5Cited by
2References
7Claims
0Family size
Inventors
Key dates
| Filing date | Dec 16, 1985 |
| Grant date | Jun 23, 1987 |
| Priority date | — |
| Expiry date | Dec 16, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63H8/21
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A resiliently flexible wishbone boom comprised of a pair of boom sections attached to the pivotal mast of a sailboard. A sail located between the boom sections is attached by its leading edge to the mast and at one location along its trailing edge to the outer end of the boom. The boom has flexible forward portions which enable the boom sections to be drawn closer together, thereby making the boom longer and applying increased outhaul tension on the sail which changes its overall curvature and aerodynamic efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.