Energy return spring shoe construction

Details Energy return spring shoe construction Energy return spring shoe construction

1987-10-13

1989-07-04

Chi, James Kee

Boots, shoes, and leggings

Heels

Cushion

36 27, A43B 2130

Patent

active

048437379

ABSTRACT:
An article of footwear with a spring device positioned in the heel portion of the article's midsole. The device is comprised of two, horizontal, rectangular, semi-elliptical shaped plates, with outwardly curving surfaces facing, joined at either end and having a plurality of springs positioned between the plates and joined to the plates at either end of the plates.

REFERENCES:
patent: 4342158 (1982-08-01), McMahon et al.
patent: 4391048 (1983-07-01), Lutz
patent: 4492374 (1985-01-01), Lekhtman et al.
patent: 4638575 (1987-01-01), Illustrato
patent: 4771554 (1988-09-01), Hannemann

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