Ultra-thin liquid-filled insole interface

Abstract

An ultra-thin liquid-filled insole interface for use in footwear is provided. The ultra-thin liquid-filled insole interface can be removable or fixed to an article of footwear, especially to protect against friction or shear forces.

Description

[0001] The present application is based on and claims the benefit of U.S. provisional patent application Ser. No. 60 / 598,363, filed Aug. 3, 2004, the content of which is hereby incorporated by reference in its entirety. The present application is also a Continuation-in-Part of and claims priority to U.S. patent application Ser. No. 10 / 142,353, filed May 8, 2002, which is hereby incorporated by reference.BACKGROUND OF THE INVENTION [0002] Insoles currently exist to provide cushioning in articles of footwear such as shoes and boots. One type of insole is a removable insole that can often be purchased separately from the footwear article and used to replace an existing insole and / or to add additional cushioning. However, one problem associated with many such insoles is that they are usually padded, and thus, relatively thick. The added thickness often causes a wearer's foot to rub against the top and side inner surfaces of the shoe, boot or the like, which results in discomfort. Also, ...

AI Technical Summary

Problems solved by technology

However, one problem associated with many such insoles is that they are usually padded, and thus, relatively thick.

The added thickness often causes a wearer's foot to rub against the top and side inner surfaces of the shoe, boot or the like, which results in discomfort.

Also, current padded insoles do not generally mitigate the negative effects of foot friction.

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