Device for suspending a foot within a shoe and shoes incorporating such devices

Abstract

An improved sole construction for use in shoes. The sole construction consists of a hammock-like lattice formed of medium to high modulus polymers, or a lightweight metal alloy. The lattice substantially conforms in topography to the foot, or a weight-bearing portion thereof (such as the heel or forefoot). The lattice may be disposed on, and supported by, a resilient frame, or secured directly to the shoe upper. The lattice supports the foot while suspending it slightly, even during gait, above the interior base of the shoe. The suspended portions of the foot are thusly protected from the shock of striking a surface (such as the ground, during gait), and are gently supported while bearing a load.

Description

RELATED PATENT APPLICATIONS [0001] This application is a continuation in part of, and claims priority from, U.S. patent application Ser. No. 60 / 202,009, filed on May 4, 2000. [0002] This application is a continuation, and claims priority from, U.S. patent application Ser. No. 09 / 667,192, filed on Sep. 20, 2000.FIELD OF THE INVENTION [0003] The invention relates to footwear, namely the interior sole structures of shoes. In particular, the invention relates to constructions for use as an interior sole of a shoe, to wholly or partially suspend a foot above the base of the shoe, even during gait. HISTORY OF THE RELATED ART [0004] In recent years, the increasing popularity of shoes designed for enhanced comfort has led to a number of improvements to the insole structure of different types of shoes. Innovations in flexible cushioning materials, such as the development of molded ethylene vinyl acetate (EVA) outsoles and polyurethane foam insoles, have enabled manufacturers to provide a deg...

AI Technical Summary

Benefits of technology

[0008] The invention provides shoes with an improved sole structure, as well as removable orthotic soles, which each overcome many of the limiatations of the prior art by suspending the foot above the ba

Problems solved by technology

While each of the aforementioned designs has its advantages, all also have limitations.

For example, soft molded insoles and outsoles can become uncomfortable if their contours do not match those of the wearer's foot.

In the trampoline and bladder designs, the springiness which improves performance if used at discreet points in an otherwise conventional midsole design can cause the shoe to become unstable if added throughout the midsole.

Foot fatigue is also an issue

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