Athletic shoe with compression indicators and replaceable spring cassette

  • US 5,513,448 A
  • Filed: 07/01/1994
  • Issued: 05/07/1996
  • Est. Priority Date: 07/01/1994
  • Status: Expired due to Term
First Claim
Patent Images

1. An athletic shoe characterized by:

  • a bottom cushioned sole;

    shoe upper connected to said bottom cushioned sole and forming with said sole an interior sized for receiving a human foot;

    an insole removably mountable in the interior of said shoe and normally mounted over an upper surface of said bottom sole;

    said bottom sole having a cavity that is accessible through its upper surface such that it is accessible from the interior of said shoe;

    a flexible resilient cassette mounted in said cavity;

    said cassette having an outer wall contoured to form a first portion of a fastener assembly;

    said cavity having a side wall contoured to provide a second portion of said fastener assembly;

    said cassette made from a resiliently flexible material;

    said cassette normally being positively secured in place within said cavity during normal wear and flexing of said shoe sole during use on a foot via said fastener assembly with first and second portions forming a positive interlock;

    said cassette being removable from said cavity by removal of said inner sole and flexing of said bottom sole such that its rear and forward ends move downwardly with respect to its center section to disengage said first portion from said second portion of said fastener assembly and allow removal of said cassette from said cavity and from said interior of said shoe.

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