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Thermally neutral portable power sources

  • US 5,343,368 A
  • Filed: 01/22/1993
  • Issued: 08/30/1994
  • Est. Priority Date: 01/22/1993
  • Status: Expired due to Fees
First Claim
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1. A portable device that includes a housing,an energy source mounted within said housing,an energizeable load mounted within said housing being connected to said energy source which when energized converts at least some of the source energy into heat,thermal means disposed entirely in said housing, said thermal means being in heat transfer relationship with the load and the housing that contains a phase change material which changes state at a desired temperature to maintain the housing in a thermally neutral condition wherein the housing neither rejects or accepts heat energy from its surrounding environment, andmeans for initializing the phase change material to a desired state.

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