MIDPORTION FOOTWEAR FORCED VENTILATOR Russian patent published in 2009 - IPC A43B7/06 A43B13/14 

FIELD: shoe industry.

SUBSTANCE: invention refers to shoe industry, particularly can be used for forced internal footwear ventilation due to atmospheric air injection through footwear toes. The atmospheric air is injected through horizontal elastic channeling arranged in the sole. The sole consists of at least three layers firmly interconnected. The centre contains soft and elastic material layer with horizontal elastic tubes. Elastic tubes or elastic channels are not interconnected. In walking the heel back interacts to the surface of the former, then sole and surface contact is shifted to the sole toes. Simultaneously the load is sequentially shifted from the heel to the sole toes. Under the gravity channels are deformed and blocked thus pushing the air through the channels from the heel to the footwear toes. Elastic tubes or elastic channels is small-diameter round or elliptic sectioned herewith the internal diameter does not exceed 1.5-2.0 mm. Pressure increase inside of the footwear causes air and water vapour exhaust through the natural cracks between a foot, internal surface of footwear top and toe material. It is repeated with each step, i.e. in walking horizontal channelling represents the pump which injects the atmospheric air to the footwear toe.

EFFECT: improved footwear comfort and hygienic properties.

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