PNEUMATIC TIRE Russian patent published in 2013 - IPC B60C11/12 

FIELD: transport.

SUBSTANCE: invention relates to automotive industry. Proposed tire comprises blind cutout 5 made in tread surface 1 and including minor hole arranged radially relative to tires, and three cuts 4 extending radially from said hole 2 to surface of contact with pavement 3. Said cuts 4 are made with spinning inside with center at small hole 2, angle of spinning from top to bottom surfaces of contact with pavement makes, at least, 3-10° but not over 135°. Besides, radial length of said cuts 4 or their width are larger on tread surface 1 than those on its bottom surface.

EFFECT: better braking on ice.

14 cl, 7 dwg, 1 tbl