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US 7,028,418 B1Granted
Integrated and hybrid sole construction for footwear
AssigneeARCA Industrial Corp
InventorRicky Huang
Life of this patent
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Abstract
Techniques for fabricating footwear with an integrated and hybrid sole design where a non-rubber material is used to cross link with rubber. A vulcanizable polyurethane capable of being vulcanized to cross link with rubber may be used to construct the middle sole which is unified with a rubber upper portion and a rubber lower sole.
Claims11
A footwear product, comprising:
- an upper portion having a bottom rubber surface;
- a middle sole formed of a non-rubber material that is a polyurethane capable of being vulcanized to cross link with rubber, having a first surface unified with said bottom rubber surface by cross linking and a second opposing surface;
- and
- a lower rubber sole having a top rubber surface that is unified with said second surface of said middle sole by cross linking, wherein the cross linking between the upper portion and the cross linking between the middle sole and the lower rubber sole and the middle portion are formed via a single vulcanization process.
1 more element
Dependencies are inferred from the claim text.