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Hard plate for spiked track shoes

  • US 5,724,754 A
  • Filed: 09/04/1996
  • Issued: 03/10/1998
  • Est. Priority Date: 05/13/1992
  • Status: Expired due to Fees
First Claim
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1. A hard plate for a spiked track shoe comprising:

  • a propulsion region for gripping ground surface and suppressing rearward slippage of the track shoe relative to the ground surface, said propulsion region being provided with a plurality of transverse grooves extending perpendicularly relative to a center line of said shoe on a substantially overall anterior forefoot portion in at least about one-half a forefoot portion;

    a braking region for buffering landing impact on the ground surface and for rapidly gripping the ground surface upon landing, said braking region being provided with a plurality of first large projections having a pyramid shape on an outer side of a posterior forefoot portion, said first large projections are aligned outwardly from the center line of said shoe in a first inclined direction at a first predetermined angle, wherein a base of one side face of each of said first large projections is orthogonal with said first inclined direction, and wherein said one side face of each of said first large projections is oriented substantially forwardly in said first inclined direction; and

    a balance and acceleration region for maintaining right and left balances on contact with the ground surface and for providing a propulsion force at a start dash moment, said balance and acceleration region being provided with a plurality of second large projections having a pyramid shape on an inner side of said posterior forefoot portion, wherein said second large projections are aligned inwardly from said center line of said shoe in a second inclined direction at a second predetermined angle, and wherein a base of one side face of each of said second large projections is orthogonal with said second inclined direction, and wherein said one side face of said second large projection is oriented substantially rearwardly in said second inclined direction.

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