U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Shoe sole having compressible shock absorbers

Patent 4918838 Issued on April 24, 1990. Estimated Expiration Date: Icon_subject August 5, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Pressurized porous material cushion shoe base
Patent #: 4229889
Issued on: 10/28/1980
Inventor: Petrosky

Sole-and-heel structure having premolded bulges
Patent #: 4577417
Issued on: 03/25/1986
Inventor: Cole

Article of footwear
Patent #: 4680876
Issued on: 07/21/1987
Inventor: Peng

Sole
Patent #: 4768295
Issued on: 09/06/1988
Inventor: Ito

Shoe construction with air cushioning Patent #: 4779359
Issued on: 10/25/1988
Inventor: Famolare, Jr.

Inventor

Assignee

Application

No. 228458 filed on 08/05/1988

US Classes:

36/28, Cushion36/29Pneumatic

Examiners

Primary: Watkins, Donald

Attorney, Agent or Firm

International Classes

A43B 013/20
A43B 021/26

Abstract

This is a sole with compressible shock absorbers which not only provides an improved shock absorbing function but also provides more comfort for the wearer. The shock absorbers consist of a polygonal replaceable air bellows placed in a polygonal recess on the forefoot section of the shoe and a cylindrical replaceable air cylinder placed in a circular recess on the heel section of the shoe. The air cylinder and air bellows are made of an integrally resilient air-tight material such that, during exercise, the shock absorbers absorb and then return the energy in a controlled upward direction, by way of the bellows-type body and the friction caused between the inside wall of the recess and the bellows itself. Moreover, since the shock absorbers can be placed easily by hand, the wearer can adjust the shoes in line with his weight and type of sport performed. The uses of the shoe are therefore maximized because the air cylinder and air bellows will continue to function even after the outer sole has experienced considerable wear and tear.

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