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Hard plate for spiked track shoes

  • US 5,483,760 A
  • Filed: 12/22/1994
  • Issued: 01/16/1996
  • 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 small projections on a substantially overall anterior forefoot portion in at least about half the 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 on an outer posterior forefoot portion, each of said first large projections being greater than said small projections of said propulsion region;

    whereinsaid first large projections are aligned outwardly from a center line of said shoe in a first inclined direction and at a first predetermined angle such that a base of one side face of each of said first large projections is orthogonal with said first inclined direction, and such that said one side face of each of said first large projections is oriented substantially forward 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 on an inner posterior forefoot portion, each of said second large projections being greater than said small projections of said propulsion region, whereinsaid second large projections are aligned inwardly from said center line of said shoe in a second inclined direction at a second predetermined angle such that a base of one side face of each of said second large projections is orthogonal with said second inclined direction, and such that said one said side face of each of said second large projections is oriented substantially rearward in said second inclined direction.

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