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US 4,843,737 AGranted
Energy return spring shoe construction
OwnerThomas W. Vordererinventor
Life of this patent
Estimating the term…
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.
Claims19
An article of footwear constructed to transiently store and return energy to a wearer as well as provide shock absorption, comprising:
- an upper portion;
- a bottom portion having a mid sole and connected to said upper portion;
- and
- a spring device positioned within said mid sole, said spring device being comprised of two horizontal, rectangular, semi-elliptical plates, with outwardly curving surfaces facing, connected to each other at each plate's forward and rearward ends, and having a plurality of springs positioned between said plates and joined to said plates at said plates' forward and rearward ends.
1 more element
An article of footwear constructed to transiently store and return energy to a wearer as well as provide shock absorption comprising:
- an upper portion;
- a bottom portion having a mid sole and connected to said upper portion;
- and
- a spring device positioned within said mid sole, said spring device being comprised of two horizontal, rectangular, semi-elliptical shaped plates, with outwardly curving surfaces facing, connected to each other at each plate's forward and rearward end, and having a plurality of bands made from an elastic-type material, positioned between said plates and joined to said plates at said plate's forward and rearward ends.
1 more element
Dependencies are inferred from the claim text.