Swimming shoe for breast stroke
US4310938A · kind A · utility
Inventor
Key dates
| Filing date | Dec 6, 1979 |
| Grant date | Jan 19, 1982 |
| Priority date | — |
| Expiry date | Dec 6, 1999 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2031/117
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
The present swimming shoe is intended for use in connection with breast stroke swimming as opposed to other types of swim strokes. For this purpose the body of the present swimming shoe has a cavity for receiving a swimmer's foot and a bottom or sole as well as a shoe upper. Two thrust or propulsion flaps or flippers are hinged to the shoe body in such a manner that a pulling movement of the swimmer's legs substantially reduces the surface area of the swimming shoe, whereas a thrust or propulsion movement of the swimmer's legs increases the "thrust surface area" in an optimal manner. To this end one propulsion flap is hinged to a longitudinal edge of the sole whereas another propulsion flap is hinged to the longitudinal side of the shoe upper, preferably diagonally opposite the first flap or flipper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.