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Boot with frictional heat generator and forced air circulation

  • US 4,941,271 A
  • Filed: 08/11/1988
  • Issued: 07/17/1990
  • Est. Priority Date: 08/11/1988
  • Status: Expired due to Fees
First Claim
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1. A boot having an internal, sealed air system with forced air circulation which comprises:

  • a. a sole formed of an outer sole and an inner sole pivotally attached together at the toe of the boot for hinged movement in response to the movements of a wearer'"'"'s foot;

    b. a first compartment between said outer and inner soles;

    c. a flexible diaphragm extending between said inner and outer soles, enclosing and sealing said first compartment;

    d. at least a second compartment located within said boot and above the inner sole thereof;

    e. an air passageway means open to said first and second compartments and extending therebetween to permit free air flow between said compartments; and

    f. a frictional heat generator mounted in said first compartment for movement in response to said hinged movement of said inner and outer soles, thereby providing a frictional heat generator located within said first compartment.

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