INSOLE WITH REDUCED FRETTING WEAR Russian patent published in 2015 - IPC A43B17/00 

FIELD: personal use articles.

SUBSTANCE: invention relates to footwear industry and is aimed at improvement of insole structure where in the front push phase fretting-wear conditions do not take place; such conditions negatively affect the insole and cause foot chafing. The required conditions are ensured by creation of a depression in the heel-and-waist part of the insole, the depression consisting of two combined surfaces, a spherical frustrum and an inclined plane that are smoothed away at the spot of interfacing. For nonslip effect intensification the inclined surface of the depression is agitated.

EFFECT: increase of the depression volume and its filling with a resilient friction material ensure (apart from nonslip) human body shock absorption in the front push phase.

3 cl, 2 dwg