PNEUMATIC TIRE FOR HIGH-LOADED CARS Russian patent published in 2019 - IPC B60C11/03 B60C11/13 

FIELD: manufacturing technology.

SUBSTANCE: tire tread design contains: a pair of longitudinal main grooves with a wavy profile, shoulder lug grooves running in the transverse direction of a tire to the edge of the contact patch with the ground and connected to the longitudinal main grooves in the first turning sections of the grooves, which pass outside; central lug grooves, connecting with the longitudinal main grooves on the second rotary portions of the grooves that extend inward; and a plurality of central blocks formed by a pair of adjacent central lug grooves from central lug grooves adjacent in the tire circumferential direction and longitudinal main grooves forming a row in the tire circumferential direction. Central lug grooves and longitudinal main grooves have a smaller groove width than shoulder lug grooves; and each zone of the central blocks includes the first two narrow grooves with a curved profile without curved sections and with a smaller groove width than the shoulder lug grooves. First narrow grooves extend into one of the adjacent central lug grooves.

EFFECT: reduced warm-up during the operational kilometers and increased wear resistance when driving on bad roads.

17 cl, 5 dwg, 6 tbl