Patent ID: 6994139
Filing Date: 2006-02-07
Classification: B60C,Y10T

Abstract:
1. 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, each circumferential alignment of said first reinforcing threads being, within each bead, bordered axially inwardly and axially outwardly by windings of second reinforcing threads oriented substantially circumferentially and having an elasticity modulus greater than or equal to that of said first reinforcing threads, said first reinforcing threads and said windings of second reinforcing threads being separated by a layer of rubber 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 windings of second reinforcing threads are arranged at a radial distance from the tire rotation 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 tire rotation axis A.