Elastic pressure and automatic-air-ventilation type of insole

Details Elastic pressure and automatic-air-ventilation type of insole Elastic pressure and automatic-air-ventilation type of insole

1984-03-06

1987-01-06

Schroeder, Werner H.

Boots, shoes, and leggings

Insoles

36 44, A43B 1338

Patent

active

046335978

ABSTRACT:
It is an elastic air-sack type of insole, which will make the air inside the shoes circulated by means of restoring effect of the air sack. The air sack insole is made of an elastic film piece being closely attached to the edge of a flat insole. Along the edge of the insole, an auxiliary air tube is mounted. The air-sack type of insole may, if necessary, be installed with a coil spring, or sponge, or a check valve for intake air or exhausting air; instead, a plurality of air tubes disposed abreast or a discrete air sack may be attached to the bottom surface of the insole.

REFERENCES:
patent: 4183156 (1980-01-01), Rudy
patent: 4217705 (1980-08-01), Donzis
patent: 4219945 (1980-09-01), Rudy
patent: 4414760 (1983-11-01), Faiella
patent: 4446634 (1984-05-01), Johnson
patent: 4476638 (1984-10-01), Quacquarini
PCT, WO79/00210 Donzis, 3-1979.

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