WINTER TYRE Russian patent published in 2017 - IPC B60C11/03 B60C11/12 

FIELD: automobile manufacturing.

SUBSTANCE: tyre comprises a tread band with the tread pattern in it. This tread pattern comprises two circular flutes, many crosscut flutes, numerous knife cuts. Along with this, the tread band central zone is a 30% of the tread band effective width wide. Numerous knife cuts are generated in the central zone module. At the same time, the knife cuts from the numerous knife cuts have a mean spiral angle towards the circumferential direction. This angle varies sign-variably in the circumferential direction for the sequence formation of the knife cuts that are inclined and underlined the opposite angle in some neighboring in the circumferential direction of the central zone module.

EFFECT: guarantee of the excellent running quality both when moving over the surface covered with snow or ice and when moving over the dry or wet surface, especially in case where these tyres have wide profile width.

15 cl, 5 dwg, 4 tbl