Patent ID: 6776205
Filing Date: 2004-08-17
Classification: B60C,Y10T

Abstract:
A tire comprising a crown, two sidewalls and two beads, a carcass reinforcement anchored in said beads and a belt reinforcement;wherein said belt reinforcement comprises two superposed reinforcing rows formed by cords parallel in each row and criss-crossed from one row to the other by forming angles (&agr;, &bgr;) with the circumferential direction ranging between 10Â° and 70Â°; wherein between said reinforcing rows, at least two rubber decoupling layers of different mechanical properties are placed axially adjacent; wherein each of said rubber decoupling layers is in contact with said cords of said reinforcing rows; wherein a first rubber decoupling layer is placed between the center part of said reinforcing rows; wherein a second rubber decoupling layer is placed on at least one side of said first rubber decoupling layer and extends at least as far as the corresponding lateral ends of said reinforcing rows; and wherein said belt reinforcement comprises, on the same side as said second rubber decoupling layer, an additional reinforcing row of cords oriented in the circumferential direction and extending axially roughly like said second rubber decoupling layer.