Michelin Recherche Et Technique S.a.

Compagnie Generale Des Etablissements Michelin

Compagnie Generale Des Establissements Michelin

Societe Detechnologie Michelin

Eric Slachmuylders

Stéphane Oraison

Fabien Marlier

Benjamin Quantinet

Sylvie Lhospitalier

Eric A De Benedittis

Pierre Yem

Tire for a heavy goods vehicle, comprising a crown reinforcement, and, radially outside this crown reinforcement, a tread having a total thickness PMU of material intended to become worn during running, the crown reinforcement being formed by at least two working plies and a protection ply positioned radially outside the working plies and radially inside the tread, the narrowest working ply having a width in the range from 70% to 90% of the width W of the tread, the protection ply having a width at most equal to 70% of the width of the narrowest working ply, the tread comprising grooves only in the part radially outside the protection ply, each circumferentially orientated groove having a depth at least equal to 75% of the maximum thickness intended to become worn PMU. This tread comprises, axially between an axial end of the narrowest working ply and an axial end of the protection ply located on the same side of the equatorial plane, a channel that is generally circumferentially orientated and runs all the way around the tire, this channel being formed in such a way that the minimum distances between this channel and the working plies and between this channel and the protection ply are different from zero.

Combination of a heavy goods vehicle tire structure with a tread pattern

Pneumatic tire

Tread for a tire provided with a running surface intended to come into contact with the roadway when running, this tread comprising a plurality of blocks of mean axis XX' intersecting the running surface of the tread, each block, including a side wall that makes a full circuit of the block about the axis XX&#x2032;. This side wall intersects the running surface at an edge with a closed geometric outline, this edge delimiting a contact surface via which the block makes contact with the roadway. The side wall of the block and the opposite wall delimit an incision, the blocks being provided on their lateral surface with at least one notch having a depth measured perpendicular to the lateral surface of the block and a width measured parallel to the lateral face of the block, the at least one notch at least partially making a circuit of the block about the axis XX&#x2032;, that is to say at least over 180 degrees.

Tread for tire including gum blocks with notches

Pneumatic tire for heavy vehicle

Growing community of inventors

Clermont-Ferrand, France

Eric Slachmuylders