US 11,691,458 B2
Tire comprising a tread having grooves with undercut side faces and reinforcing elements
Sylvain Morival, Clermont-Ferrand (FR); Frédéric Perrin, Clermont-Ferrand (FR); and Patrick Pallot, Clermont-Ferrand (FR)
Assigned to COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR)
Appl. No. 16/495,969
Filed by COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR)
PCT Filed Mar. 19, 2018, PCT No. PCT/FR2018/050656
§ 371(c)(1), (2) Date Sep. 20, 2019,
PCT Pub. No. WO2018/172680, PCT Pub. Date Sep. 27, 2018.
Claims priority of application No. 1752256 (FR), filed on Mar. 20, 2017.
Prior Publication US 2020/0130417 A1, Apr. 30, 2020
Int. Cl. B60C 11/00 (2006.01); B60C 11/13 (2006.01)
CPC B60C 11/0041 (2013.01) [B60C 11/0008 (2013.01); B60C 11/0058 (2013.01); B60C 11/13 (2013.01); B60C 11/1307 (2013.01); B60C 11/1346 (2013.01); B60C 2011/0025 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A tire comprising a tread having a contact surface for coming into contact with a carriageway when the tire is rolling, the tread comprising:
at least one circumferential reinforcing element, at least a portion of a meridian cross-section of the at least one circumferential reinforcing element being in the shape of an obtuse triangle, a vertex of which is oriented radially toward the outside, and the at least one circumferential reinforcing element consisting of a rubber mixture with a dynamic shear modulus G* greater than a dynamic shear modulus G* of a main rubber mixture of the tread;
at least two grooves extending at least partially circumferentially, each circumferential groove being delimited by a groove bottom and axially by two side faces;
at least one tread block formed between two circumferential grooves, the at least one tread block having an axial width measured at a radial level corresponding substantially to the groove bottom,
wherein at least one of the side faces is undercut, and
wherein the at least one circumferential reinforcing element is arranged axially relative to the undercut side face at a non-zero distance d of between 0 and 15% of the axial width of the at least one tread block, the non-zero distance d being substantially constant extending radially from the inside toward the outside over an entire radial height h of the at least one circumferential reinforcing element and from a radial level situated above a wear limit level and to a radial height equal to 5% of a thickness p of the tread.