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Michelin Recherche Et Technique S.a.

Compagnie G&eacute;n&eacute;rale Des Establissements Michelin - Michelin & Cie

Compagnie G{acute Over (e)}n{acute Over (e)}rale Des Etablissements Michelin - Michelin & Cie

Jean-Yves Denoueix

Pedro Costa Pereira

Bernard Guerinon

Yves Herbelleau

Jacques Barraud

Daniel Grier Osborne

A tire wherein the reinforcing cords of the carcass, in the part situated between the anchoring zone of the carcass and the sidewall, are in contact with at least one layer of cushion compound having a high modulus of elasticity on the axially outer side and a low modulus of elasticity on the axially inner side and in the sidewall.

Tire having an improved carcass

A tire having a crown which includes a ply of circumferentially oriented, helically wound reinforcing threads. This ply is arranged such that in sensitive zones, for example, beneath the grooves of the tread pattern, the laying pitch of the circumferential reinforcing threads is greatly increased. This substantially reduces the risks of damage to the circumferential reinforcing threads in these zones.

Tire having improved endurance

The tire has a single layer of cushion compound between the cords of the carcass reinforcement that are furthest radially outward in the crown and the cords of the belting that are furthest radially inward in the crown. The single layer of cushion compound may have either a high modulus of elasticity of between 7 and 25 MPa for high crown rigidity or a low modulus of elasticity of less that 6 MPa for reduced hysteresis energy loss.

Tire with simplified crown reinforcement

Growing community of inventors

Blanzat, France

Jean-Yves Denoueix