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GRIPPER ELEMENTS FOR SPORTS SHOES

  • US 3,859,739 A
  • Filed: 05/16/1973
  • Issued: 01/14/1975
  • Est. Priority Date: 05/24/1972
  • Status: Expired due to Term
First Claim
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1. A gripper element for a sports shoe, such as a shoe for use on plastic tracks, said gripper element comprising a body having a first end and a second end, a longitudinal axis exteNding between said ends, said second end being adapted to be secured to the outsole of a sports shoe, a conical outer surface to said body whereby said body is narrower at said first end than at said second end, further comprising means defining longitudinally extending grooves, circumferentially spaced around said body, the depth of said grooves increasing gradually from said first end to a point approximately centrally of said first and second ends, and then gradually decreasing, and further comprising a flat end surface substantially perpendicular to said longitudinal axis at said first end, whereby the ends of said grooves adjacent said first end form gripper edges with said end surfaces and the ends of said grooves nearer said second end form support surfaces.

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