PNEUMATIC TIRE Russian patent published in 2017 - IPC B60C11/03 B60C11/13 

FIELD: transportation.

SUBSTANCE: pneumatic tire comprises a plurality of central soil-engaging grooves arranged at regular intervals along the tire circumference that extend through the equatorial line of the tire and comprise a first rotation groove section and a second rotation groove section; a plurality of shoulder soil-engaging grooves arranged at defined intervals between the plurality of central soil-engaging grooves along the tire circumference and extending to the outside in the transverse direction of the tire, the inner end in the transverse direction of the tire being positioned externally with respect to the end of the central soil-engaging groove in the transverse direction of the tire; a pair of longitudinal main grooves to which the ends of the central ground loosening grooves are connected in series, and the inner ends of the plurality of shoulder soil-engaging grooves in the transverse direction of the tire; and a longitudinal secondary groove located along the entire circumference of the pneumatic tire, intersecting the central soil-engaging grooves.

EFFECT: increasing the resistance to warming-up in the running area in the central tire tread zone while preserving the characteristic of stone-grasping resistance.

9 cl, 7 dwg, 3 tbl