INSOLE Russian patent published in 2010 - IPC A43B17/08 A43B7/08 

FIELD: personal use articles.

SUBSTANCE: single-layer insole is made of elastic material, has upper flat side facing foot, and lower profiled side facing the main insole, with which it creates a system of cavities and channels. Side of insole facing foot is flat. In heel part of insole there are through holes arranged parallel to central axis of heel. Layer facing the main insole is profiled, and in cross section it has longitudinal ledges of trapezoid shape with rounded angles (radius of rounding equals 2-4 mm). Between longitudinal ledges there are grooves arranged, which mirror anatomic shape of foot, with length from heel rounding to toe part. Height of longitudinal ledges in heel part and grooves arranged between them relative to thickness of insole makes 3:1, and they produce cavity that mirrors anatomic shape of heel. In waist and toe parts of insole, height of ledges and grooves relative to thickness of insole makes 2:1 and 4:1 accordingly. Ledges and grooves arranged between them are equidistant from surface of insole facing foot, and have widened outlets along perimetre of toe part, ending with cutouts. In toe part of insole there is an additional ledge with groove closed in waist area and opened in toe part, which adjoins group of longitudinal ledges and grooves at inner and outer sides accordingly. Upper layer of insole is duplicated with leather or other material to improve its hygienic properties.

EFFECT: improved comfort of inner shoe space due to forced directed motion of air from heel part of shoes into toe part, by reduction of volumes formed by grooves and ledges at lower side of insole, and the main insole, and increased speed of air motion as it travels in ledges of various volume along whole length of insole, with simultaneous creation of foot bed in heel and toe parts.

2 cl, 11 dwg