US 12,350,971 B2
Tire tread for a heavy-duty vehicle having improved resistance to attack
Xavier Neau, Clermont-Ferrand (FR)
Assigned to COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR)
Appl. No. 18/038,918
Filed by COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR)
PCT Filed Nov. 19, 2021, PCT No. PCT/FR2021/052039
§ 371(c)(1), (2) Date May 25, 2023,
PCT Pub. No. WO2022/112689, PCT Pub. Date Jun. 2, 2022.
Claims priority of application No. 2012247 (FR), filed on Nov. 27, 2020.
Prior Publication US 2024/0092126 A1, Mar. 21, 2024
Int. Cl. B60C 11/12 (2006.01); B60C 11/03 (2006.01)
CPC B60C 11/125 (2013.01) [B60C 11/0323 (2013.01); B60C 11/1281 (2013.01); B60C 2200/06 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A tire tread for a heavy-duty vehicle, intended to come into contact with the ground via a tread surface, comprising cuts delimiting raised elements,
the tread in the new state comprising at least one complex cut comprising, along a mean line (Lm), an alternation of external cavities, opening onto the tread surface, and internal cavities, not opening onto the tread surface, two consecutive cavities, respectively an external cavity and an internal cavity, being connected to each other by a connecting channel,
each external cavity having, in a mean surface (Sm) containing the mean line (Lm) and a radial direction (ZZ′) perpendicular to the tread surface, a height (H11), measured, in the radial direction (ZZ′), between the tread surface and an external cavity bottom, and a length (L1), measured, along the mean line (Lm), at the tread surface,
each internal cavity having, in the mean surface (Sm), a height (H22), measured, in the radial direction (ZZ′), between an internal cavity top and an internal cavity bottom radially on the inside of the external cavity bottom, and a length (L2), measured, along the mean line (Lm), at the bottom of the internal cavity,
each connecting channel having, in the mean surface (Sm), a height (H3), measured, in the radial direction (ZZ′), between a connecting channel top, which is at a same radial position as the internal cavity top, and a connecting channel bottom, which is at a same radial position as the external cavity bottom, at the circumferential join between the external cavity and the connecting channel, and a length (L3), measured, along the mean line (Lm), between the external cavity and the internal cavity, which is non-zero,
each complex cut having, in the mean surface (Sm), a height (H), measured, in the radial direction (ZZ′), between the tread surface and the internal cavity bottom,
the height (H11) of each external cavity being at least equal to half the height (H) of the complex cut,
wherein the height (H3) of each connecting channel is at most equal to one third of the height (H) of the complex cut,
wherein an entire extent of the connecting channel top and the internal cavity top are at a same radial position.