US 12,459,300 B2
Tire comprising a tread
Bertand Boisdon, Clermont-Ferrand (FR); Jerome Labrousse, Clermont-Ferrand (FR); and Marie-Hélène Vantal, Clermont-Ferrand (FR)
Assigned to COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR)
Appl. No. 17/774,564
Filed by COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR)
PCT Filed Nov. 6, 2020, PCT No. PCT/FR2020/052020
§ 371(c)(1), (2) Date May 5, 2022,
PCT Pub. No. WO2021/089960, PCT Pub. Date May 14, 2021.
Claims priority of application No. 1912450 (FR), filed on Nov. 6, 2019.
Prior Publication US 2022/0402307 A1, Dec. 22, 2022
Int. Cl. B60C 11/03 (2006.01); B60C 11/13 (2006.01)
CPC B60C 11/0302 (2013.01) [B60C 11/1392 (2013.01); B60C 2011/0313 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A tire comprising a directional tread, said tread comprising:
two edges and a centre (C) dividing said tread into two parts of substantially equal width,
said tread comprising, on one of the two parts of said tread, a plurality of sets of blocks,
each set of blocks comprising at least one block,
each set of blocks extending from one of the edges of the tread until the centre (C) of said tread with a non-zero curvature,
each set of blocks comprising an edge zone near an edge of the tread, a central zone at the centre of said tread, and an intermediate zone between the edge zone and the central zone,
each set of blocks comprising a set of chamfers comprising at least one chamfer, said set of chamfers extending over the edge zone, the central zone and the intermediate zone of the set of blocks,
wherein a width LC2 of the set of chamfers over the intermediate zone is different from a width LC3 of the set of chamfers over the central zone, said widths LC2 and LC3 being comprised between 0.5 mm and 2.5 mm, a width of a chamfer corresponding to a distance between the radially outermost point of the chamfer and the radially innermost point of this chamfer in a groove, projected onto a tread surface of the tread, and measured in the circumferential direction,
wherein the set of chamfers has an inclined wall extending radially inward from the tread surface of the tread to a vertical edge face, and
wherein an intermediate zone angle of inclination is between 30 degrees and 50 degrees, and a central zone angle of inclination is between 30 degrees and 50 degrees.