Athletic shoe with energy storing spring

Details Athletic shoe with energy storing spring Athletic shoe with energy storing spring

1988-09-14

1989-11-21

Schroeder, Werner H.

Boots, shoes, and leggings

Heels

Cushion

36 27, A43B 2130

Patent

active

048813290

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.

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patent: 2016522 (1935-10-01), Stein
patent: 2413545 (1946-12-01), Cordi
patent: 4342158 (1982-08-01), McMahon et al.
patent: 4486964 (1984-12-01), Rudy
patent: 4588443 (1986-05-01), Bache
patent: 4638575 (1987-01-01), Illustrato
patent: 4709489 (1987-12-01), Welter
patent: 4774774 (1988-10-01), Allen, Jr.
patent: 4798009 (1989-01-01), Colonel
patent: 4815221 (1989-03-01), Diaz

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