Patent ID: 7347243
Filing Date: 2008-03-25
Classification: B60C,Y10T

Abstract:
1. A pneumatic tire comprising a carcass of at least one rubberized ply containing high-rigidity cords therein and comprised of a main body portion toroidally extending between bead cores respectively embedded in a pair of bead portions and a turnup portion extending from the main body portion and wound around the bead core and, in which the high-rigidity cords located in the main body portion are arranged side by side in substantially a radial direction, and a reinforcing member arranged at least along an outer surface of the turnup portion and comprised of at least one rubberized reinforcing layer containing high rigidity cords therein, characterized in that an outermost ply located on at least an outermost side in a widthwise direction of the tire among the plies constituting the turnup portions has at least one bending portion changing an extending direction of the cord along an innermost reinforcing layer located adjacent to the outermost ply among the reinforcing layers, and a cross cord portion is formed by an upper portion of the outermost ply located outward from a position of the bending portion in the radial direction of the tire and the innermost reinforcing layer, and a crossing angle of cords constituting the cross cord portion with respect to a circumferential direction of the tire is not less than 50°; wherein the cords of the outermost ply of the turn-up portion of the carcass extend partially in the substantially radial direction.