Athletic shoe with energy storing spring
US4881329A · kind A · utility
126Cited by
14References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 14, 1988 |
| Grant date | Nov 21, 1989 |
| Priority date | — |
| Expiry date | Sep 14, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA43B13/183
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An athletic shoe includes a spring in the midsole of the shoe. The spring is generally oval-shaped and includes convex top and bottom walls and a laterally extending opening. The spring is molded from high tensile material such as graphite fibers and resin, kevlar fibers and resin, glass fibers and resin, or ceramic materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.