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AssigneeMichelin Recherche et Technique S.A.
InventorsYves Herbelleau, Bernard Guerinon, Pierre Roux
Estimating the term…
A tire comprising a crown, two sidewalls and two beads, a carcass reinforcement anchored in each of the beads and a crown reinforcement. The carcass reinforcement comprises at least two circumferential alignments of first reinforcing threads of high elasticity modulus, each circumferential alignment of first reinforcing threads being, within each bead, bordered axially inwardly and axially outwardly by second reinforcing threads oriented substantially circumferentially of a modulus greater than or equal to that of the first reinforcing threads. The first reinforcing threads and the second reinforcing threads are separated by a layer of mix of very high elasticity modulus. The outer surface of each bead comprises a seat, a frustoconical wall of substantially radial orientation radially inwardly adjacent to a wall section in the shape of an arc of a circle EF of center C which center C is arranged axially outwardly relative to the bead. Considering a straight line CD passing through the center C and the bead and forming an angle α=+45±5 degrees relative to the axis A of the tire, all the second reinforcing threads are arranged at a radial distance from the axis A less than or equal to the locus of the line CD.
A tire, comprising a crown, two sidewalls and two beads, a carcass reinforcement anchored in each of the beads and a crown reinforcement, wherein the carcass reinforcement comprises at least two circumferential alignments of first reinforcing threads of high elasticity modulus, each circumferential alignment of said first reinforcing threads being, within each bead, bordered axially inwardly and axially outwardly by second reinforcing threads oriented substantially circumferentially of a modulus greater than or equal to that of said first reinforcing threads, said first reinforcing threads and said second reinforcing threads being separated by a layer of mix of very high elasticity modulus, and wherein the outer surface of each bead comprises a seat, a frustoconical wall of substantially radial orientation radially inwardly adjacent to a wall section in the shape of an arc of a circle EF of center C, said center C being arranged axially outwardly relative to the bead, and all the second reinforcing threads are arranged at a radial distance from the axis A less than or equal to the locus of a straight line CD passing through the center C and the bead and forming an angle α=+45±5 degree relative to the axis A of the tire.
Dependencies are inferred from the claim text.