US 12,420,595 B2
Tire with improved snow performance
Guiseppe Rodriquez, Rome (IT); and Davy Ruggiero, Rome (IT)
Assigned to Bridgestone Europe NV/SA, Zaventem (BE)
Appl. No. 18/282,565
Filed by Bridgestone Europe NV/SA [BE/BE], Zaventem (BE)
PCT Filed Mar. 17, 2022, PCT No. PCT/EP2022/057082
§ 371(c)(1), (2) Date Sep. 18, 2023,
PCT Pub. No. WO2022/195049, PCT Pub. Date Sep. 22, 2022.
Claims priority of application No. 102021000006614 (IT), filed on Mar. 19, 2021.
Prior Publication US 2024/0174031 A1, May 30, 2024
Int. Cl. B60C 11/13 (2006.01)
CPC B60C 11/1307 (2013.01) [B60C 2011/133 (2013.01); B60C 2011/1338 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A tire presenting a circumferential direction, a radial direction, and a transversal direction, and comprising:
an external tread portion which comprises a tread block, the tread block comprising a plurality of lateral external perimetral walls;
wherein at least one of the external perimetral walls bears a three-dimensional pattern of recesses and/or protrusions along the length of the external perimetral wall;
wherein the recesses and/or protrusions alternate to each other according to at least two spatial directions of the external surface
wherein the three-dimensional pattern of alternating recesses and/or protrusions is realized using a wavy generatrix swept along a wavy directrix, the wavy generatrix and the wavy directrix each comprising crest points, which are most external points of a respective external surface of the external perimetral wall, and trough points, which are most internal points of the respective external surface of the external perimetral wall, and
wherein the external perimetral wall bearing the three-dimensional pattern of recesses and/or protrusions is not a wall defining a sipe.