WINTER TIRE Russian patent published in 2020 - IPC B60C11/12 

FIELD: automotive industry.

SUBSTANCE: tire (1) comprises tread band (2) of tire, on which plurality of blocks (8a) is determined, in some blocks at least one three-dimensional narrow slot (10) is made, passing in direction, which is at an angle to tire working stroke direction (F). Three-dimensional narrow slot (10) divides unit (8a) into first segment (11) of unit, comprising first surface (13) facing in direction (F) of working stroke, and second segment (12) of the block comprising second surface (14) facing in a direction opposite to direction (F) of the working stroke. Plurality of protrusion-recesses is provided between first and second segments (11, 12) of unit, and all of said connections are formed by a plurality of projections (15) formed on first surface (13) and extending in direction of second segment (12) of unit, and multiple cavities (16) formed on second surface (14) and extending from first segment (11) of unit. Protrusions (15) provided on first surface (13) have vertex (20), which is related from said tread surface (3) to not more than 40 % of depth of three-dimensional narrow slot (10), measured on said vertex (20).

EFFECT: technical result is improvement of performance characteristics of tire on snow-covered, wet and dry roads.

19 cl, 1 tbl, 6 dwg