PNEUMATIC TIRE Russian patent published in 2014 - IPC B60C11/22 

FIELD: transport.

SUBSTANCE: invention relates to automotive industry, namely, to tread pattern. Tread section has multiple blocks with slitted drain groove made in at least one block. Said slitted drain groove is shaped to the main wave with at least one section shaped to vertex and one section shaped to recess on tread surface in contact with road. Said slitted drain groove shaped to the main wave represents, also, the set slitted drain grooves shaped to auxiliary, shorter waves.

EFFECT: better grip.

21 cl, 5 dwg