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Phase change material thermal capacitor footwear

  • US 20020164474A1
  • Filed: 11/20/2001
  • Published: 11/07/2002
  • Est. Priority Date: 07/14/1992
  • Status: Abandoned Application
First Claim
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1. An article of footwear for use in a cold environment, comprising at least one layer of thermal storage material, said thermal storage material comprising a phase change material capable of storing thermal energy as the latent heat of phase change, said phase change material having at least one phase transition at a temperature less than the maximum normal skin temperature but greater than ambient environmental temperature, said thermal storage material to be placed in thermal continuity with the skin of the user to provide a thermal environment at a temperature above said ambient temperature for an extended period of time, and to provide a heat sink to absorb metabolic heat, said absorbed metabolic heat acting to recharge said phase change material, to thereby increase the time period for which said thermal storage material provides said thermal environment at a temperature above said ambient environmental temperature.

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