Flow actuated fin system for water sport boards and the like
US5152705A · kind A · utility
24Cited by
8References
19Claims
0Family size
Inventor
Key dates
| Filing date | Dec 27, 1991 |
| Grant date | Oct 6, 1992 |
| Priority date | — |
| Expiry date | Dec 27, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63B32/66
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A multiple fin surfboard defines a generally elongated planar surfboard having a plurality of elongated slots defined therein. The slots are grouped close to each end of the surfboard and support a corresponding plurality of fins in a pivotal attachment. The fins each support transverse vanes which are acted upon by a water passage beneath the surfboard to alternatively retract the fins at one end of the surfboard and downwardly extend the fins at the opposite end of the surfboard.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.