High efficiency hydrofoil and swim fin designs
US6497597B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Mar 5, 2002 |
| Grant date | Dec 24, 2002 |
| Priority date | — |
| Expiry date | Mar 5, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2281/00
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Disclosed herein is a swim fin comprising a foot attachment member, a blade region connected to the foot attachment member and forming a forward extension of the foot attachment member. The blade region has at least one side edge that may twist, and at least one longitudinal rib member secured to the blade region. The longitudinal rib member is laterally spaced from the side edge that may twist. At least one stiffening member is disposed within the blade region between the longitudinal rib member and the side edge that may twist. The stiffening member is made with a thermoplastic material secured to the blade region with a thermal-chemical bond.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.