Device for warming the foot of a wearer

Details Device for warming the foot of a wearer Device for warming the foot of a wearer

1987-06-16

1989-01-24

Meyers, Steven N.

Boots, shoes, and leggings

Boots and shoes

Heated

36 29, A43B 0702, A43B 1318

Patent

active

047993197

ABSTRACT:
A device for warming the foot during walking which includes an inner sole defining a plurality of longitudinally communicating closed cavities which deform under compressive stress. The cavities each contain a fluid therein and a constriction is positioned between the cavities whereby heat is generated as the fluid passes through the constriction during alternating application of stresses on the cavities during walking.

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patent: 3922801 (1975-12-01), Zente
patent: 3990457 (1976-11-01), Voorhees
patent: 4123855 (1978-11-01), Thedford
patent: 4229889 (1980-10-01), Petrosky
patent: 4340626 (1982-07-01), Ridy
patent: 4446634 (1984-05-01), Johnson et al.
patent: 4458430 (1984-07-01), Peterson

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