A - Human Necessities – 43 – B
Patent
A - Human Necessities
43
B
309/7, 36/9, 2/0
A43B 13/20 (2006.01) A41D 19/00 (2006.01) A42B 3/12 (2006.01) A43B 5/04 (2006.01) A43B 7/04 (2006.01) A43B 13/38 (2006.01) A43B 17/03 (2006.01)
Patent
CA 1341244
There is disclosed a boot with an internal forced air circulation system and an inflatable lining. The boot can also be used to circulate air through protective clothing and can have a footwarmer mechanism. The boot is ideally suited for skiing. Three alterenative mechanisms are disclosed, all of which are operated by the normal movements of the person wearing the boot. The footwarmer mechanism is mounted entirely as an insert for the outer shoe or boot and is most preferably removably mounted on a bottom plate that is secured as an insert to the lower sole portion to the inner shoe. A heat engine, which is a compressible fluid engine operating on a quasi-Carnot cycle, can be used as the footwarmer. For this purpose the heat engine includes a compressor for compressing a gas, a condenser for condensing the gas into a liquid, an expansion and evaporator zone for expanding liquified gas into a gas and a return line to cycle the expanded gas to the compressor. Flow reversing valves can be provided whereby the heat engine can be reversed, to heat the shoe in the winter, and cool the shoe in the summer. In another embodiment, the foot warmer mechanism includes an electrical resistance heater, an electrical generator, a mechanical transducer to translate vertical movements of the wearer's heel into uni- directional rotational movement of a flywheel, and a gear box mechanically coupling the flywheel to the electrical generator. Optional features include a rechargeable storage battery and a radio transmitter for generating a signal useful for locating the wearer. In another embodiment, the footwarmer mechanism can be a pair of sole plates which are in sliding frictional engagement and generate frictional heat.
582452
Cassan Maclean
Lakic Nikola
LandOfFree
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