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Base for an article of footwear

  • US 4,697,361 A
  • Filed: 02/03/1986
  • Issued: 10/06/1987
  • Est. Priority Date: 08/03/1985
  • Status: Expired due to Term
First Claim
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1. A footwear base containing an elastically deformable cushioning amterial and having an upper surface for supporting the weight of the foot and a substantially plane lower surface arranged to contact the ground, said base including a first part which absorbs more pronounced shocks and a second part which absorbs less pronounced shocks when the article of footwear embodying the base is in use, said lower surface having recessed portions on said first part, and said first part comprising a first section for the ball of the foot having at least one first recess, a second section for the toes having at least one second recess, a third section for the heel having at least one third recess, and a fourth section for the outer part of the instep having at least one fourth recess, each of said recesses having a depth which is related to the loading of the respective section such that the recess in a more heavily loaded section has a greater depth that the recess in a less heavily loaded section, and said base further including a marginal part, said lower surface having a substantially circumferentially complete non-recessed border portion which circumscribes all recesses in said lower surface and spaces all recesses in said lower surface from said marginal part, said lower surface further having additional portions which, together with said border portion, completely surround at least three of said recesses.

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