PNEUMATIC TIRE Russian patent published in 2012 - IPC B60C11/11 B60C11/12 B60C11/03 

FIELD: transport.

SUBSTANCE: invention relates to automotive tire to be used on ice- or snow-covered roads. Slit-like drain grooves 11X made in rib 5 in the tire equatorial plane (TE) are formed with such shape that degree rib 5 is flattened by external force to, is smaller in tire rotational direction than that in opposite direction. Every block 10 in each shoulder zone 1S has slit-like drain grooves 11Ma in section 10A of the block pressed-in side features such 3D shape that makes block 10 with drain grooves 11Ma, when flattened by external force, smaller in direction of tire rotation compared with direction opposite the tire rotation. Every block 10 in each shoulder zone 1S has slit-like drain grooves 11Ma in section 10A of the block pressed-in side features such 3D shape that makes block 10 with drain grooves 11Ma, when flattened by external force, smaller in direction opposite the tire rotation compared with direction of tire rotation.

EFFECT: better braking properties on ice, reduced wear.

4 cl, 5 dwg