Patent ID: 6460590
Filing Date: 2002-10-08
Classification: B60C,Y10T

Abstract:
A tire having a carcass reinforcement including at least one ply of reinforcement elements anchored in each bead to at least one bead wire, the carcass reinforcement being radially covered by a crown reinforcement comprising at least two working plies formed of reinforcement elements crossed over from one ply to the next and making angles of between 10Â° and 45Â° with respect to the circumferential direction, wherein the portion AB of the carcass reinforcement positioned under the crown reinforcement, centered on the equatorial plane XXâ€² and having axial width between 0.4 and 1 times the width of the widest working crown ply, is formed of cut reinforcement elements, and the portion AB of the carcass reinforcement has, in the unvulcanized condition, a linear tensile rigidity per unit width between 0.1 and 0.7 times the linear tensile rigidity of each portion AD of the same carcass reinforcement that reinforces the sidewall of the tire, such that the ratio between the linear rigidities becomes between 0.2 and 1 when the tire is vulcanized.