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

FIELD: transport.

SUBSTANCE: invention relates to tread of tires to be used in winter. Tread 10 has multiple blocks 16. Multiple splines 18 are made on wear face 10A of blocks 16. Ledges 22 are arranged in splines 18 on surface of first wall of two surfaces 1804 of spline opposite walls while recesses 24 are made on surface of second wall of said spline to engage with said ledges 22. Engagement of said ledges and recesses suppress collapse of the components of blocks 16 located between splines 18. Height H1 of ledges 22 located on surfaces 1804 of spline walls 18 on edges of blocks 16 exceeds height H2 on surfaces 1804 of other splines 18. Therefore, collapse of the components of blocks 16 located on block edges in lengthwise direction is eliminated.

EFFECT: better braking on ice.

5 cl, 8 dwg, 2 tbl