TREAD CONTAINING SCULPTURE ELEMENTS WITH OVERLAPPING LAYER Russian patent published in 2017 - IPC B60C11/13 

FIELD: transportation.

SUBSTANCE: tread (1) is made of a rubber material and contains a plurality of notches (3) defined by opposing walls (5) forming the sidewalls of relief elements (7) of the tread. Each of the sidewalls intersects the rolling surface, forming an edge (9). At least one sidewall (5) of the relief element is partially or completely formed by an overlapping layer (11), starting from the edge (9) corresponding to this side wall. The material of this layer (11) has a modulus of elasticity exceeding the modulus of elasticity of the rubber material forming the tread. The relief element (7) has a recess (12) in its sidewall, wherein this recess is limited by the overlapping layer (11). The relief element (7) has a width W, wherein the depth P of the recess is at least 10% of the width W of the element (7) and less than or equal to 40% of this width W. The volume of the recess (12) is less than 10% of the volume of the relief element (7).

EFFECT: better grip of the tire tread on both snowy and icy roads.

5 cl, 8 dwg