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US 6,615,887 B2Granted
Tire having improved endurance
AssigneeMichelin Recherche et Technique S.A.
InventorsJean-Yves Denoueix, Pedro Costa Pereira
Life of this patent
Estimating the term…
Abstract
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.
Claims11
A tire comprising a crown extended by two sidewalls and two beads, a carcass anchored in the two beads, said crown comprising radially from the inside towards the outside:
- at least one reinforcement ply formed of parallel reinforcing threads oriented at an angle α relative to the circumferential direction of between 10 and 75 degrees,
- at least one ply of reinforcing threads which are oriented substantially circumferentially and are helically wound and extend axially substantially above the axial width of said at least one reinforcement ply, and
- a tread having tread patterns on its outer face with at least one circumferential groove, the tire characterized in that, in each zone arranged radially between one of said at least one groove and said at least one reinforcement ply formed of reinforcing threads oriented at α, the laying pitch for said reinforcing threads which are helically wound is greater than or equal to twice the axial width of said groove.
Dependencies are inferred from the claim text.