PNEUMATIC TIRES OF VEHICLE Russian patent published in 2019 - IPC B60C11/03 B60C11/16 

FIELD: motor industry.

SUBSTANCE: invention relates to a tread construction for movement primarily over ice. Pneumatic tire has a protector with profile protrusions, for example rows of profile blocks or profile belts that are separated from each other by grooves, such as, for example, circumferential grooves (3), transverse grooves (4), inclined grooves (7) and the like. In the proposed protrusions of profile with spikes (9) located in the stud holes, away from spike (9), shallow elongated recesses (10, 10', 12, 12') extending in two directions along the circumference are formed, as pockets for collecting ice crumb, which is formed by scratching the thorn on the ice. Recesses (10, 10') extending in two directions (U) along the circumference are formed in such a way that they have a matching structure, and at the same time, away from spike (9), at least one additional depression (11, 11') extends in the axial direction and, in the case of several depressions (11, 11'), has a smaller volume (V₂) in comparison with the recess(es) (10, 10') passing in each direction (U) along the circumference. Recesses (10, 10') extending in two directions (U) along the circumference, and at least one indentation (11, 11') extending axially are the only recesses per spike (9).

EFFECT: increased efficiency of the tire during braking and the action of transverse forces when driving on ice.

13 cl, 4 dwg