Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Michelin Recherche Et Technique

Societe Detechnologie Michelin

Murielle De-Tullio

Franck Nugier

Adrien Traverse

Arnaud Larregain

Olivier Spinnler

Michael Cogne

Jean-Marc Viller

Tire

Tread for a civil engineering tire, provided with circumferential grooves and transverse grooves, having two edge rows provided with a plurality of blocks, which in pairs delimiting a groove of transverse overall orientation opening both onto a circumferential groove and to the outside of the tread, each block having a contact face to contact the ground, two lateral faces&#x2014;an external lateral face and an internal lateral face, a front face and a rear face, intersecting the contact face along a front edge corner and a rear edge corner, the blocks formed such that their external lateral faces lie the same distance from an equatorial plane that divides the tread into two equal halves wherein the width of the transverse grooves increases progressively at least from a non-zero distance measured from a plane parallel to the equatorial plane through the axially outermost points of the external lateral faces of the blocks wherein the maximum increase in width of a transverse groove is at least equal to 20% and at most equal to 50% of the maximum circumferential length Lc of each block.

Civil engineering tire tread

Pneumatic tire

Tire reinforcement () having a bi-material structure of reinforcing elements that consists of at least a plurality of extensible first reinforcing elements () and at least a plurality of inextensible second reinforcing elements (), these first and second reinforcing elements being mutually parallel and distributed alternately in appropriate proportions in order to achieve the desired level of reinforcement, these first and second reinforcing elements lying within the same mean plane, this reinforcement being such that the extensible first reinforcing elements () are coupled to the inextensible second reinforcing elements () over a coupling length Lc which is shorter than the length Lof the extensible first reinforcing elements () so that, with each of the first and second reinforcing elements having two ends, at least one of the ends of the extensible first reinforcing elements () is offset in relation to the two ends of the inextensible second reinforcing elements ().

Reinforcement comprising two reinforcing materials and tire comprising such a reinforcement

Growing community of inventors

Clermont-Ferrand, France

Murielle De-Tullio