PNEUMATIC TYRE FOR HIGH-LOAD VEHICLES Russian patent published in 2017 - IPC B60C11/03 B60C11/13 

FIELD: automotive engineering.

SUBSTANCE: tyre tread pattern includes: shoulder ground-engaging grooves (11, 13), extending outwardly in the transverse direction of the tyre and extending to the edges, contacting with the road surface; a pair of longitudinal primary grooves (15, 17); central ground-engaging grooves (14); a plurality of central blocks (21), defined by the central ground-engaging grooves and a pair of longitudinal primary grooves, aligned in the circumferential direction of the tyre; and longitudinal secondary grooves (23), extending in the circumferential direction of the tyre in the zones of the central blocks and extending to the central ground-engaging grooves, adjacent to the central blocks. The longitudinal secondary grooves extend in the circumferential direction of the tyre, changing their positions in the transverse direction of the tyre, and each includes third rotational portions of the groove (23a-23d), having a curved profile or a non-lineal profile.

EFFECT: increased resistance to stone jams, and heat resistance.

12 cl, 6 dwg, 6 tbl