Patent ID: 7624779
Filing Date: 2009-12-01
Classification: B60C,Y10T

Abstract:
1. A tire having a section height, a maximum section width, an upper section above the maximum section width, and a lower section below the maximum section width, the tire comprising: a tread extending circumferentially about the tire; a pair of sidewalls; a pair of bead portions, each comprising a bead core, a bead filler having upper walls that converge at an apex at a radially outward position, and a separate bead filler insert, wherein the separate bead filler insert is provided in the lower section of the tire above the bead filler and the separate bead filler insert is spaced from the bead filler by a gap; at least one carcass ply extending circumferentially about the tire from one bead portion to the other; and at least two reinforcement plies for increasing sidewall stiffness, the at least two reinforcement plies including first and second reinforcement plies extending circumferentially about the tire and being disposed between the at least one carcass ply and the tread of the tire, the first and second reinforcement plies extend from one sidewall to the other and have lower ends that terminate in the lower section of the tire, wherein the separate bead filler insert is provided between the first and second reinforcement plies and the at least one carcass ply, an upper end of the separate bead filler insert extends above the lower ends of the first and second reinforcement plies, a lower end of the separate bead filler insert extends below an upper end of the bead filler, and the gap between the bead filler and the separate bead filler insert consists of a rubber material, wherein the first reinforcement ply includes a first set of parallel-aligned cords and the second reinforcement ply includes a second set of parallel-aligned cords that are transversely oriented with respect to the first set of reinforcement cords of the first reinforcement ply.