Patent ID: 6814117
Filing Date: 2004-11-09
Classification: B60C

Abstract:
A highway vehicle tire, comprising two beads, a bead wire within each bead, a crown reinforcement, a tread comprising a single mix of rubber, and two rubber sidewall mixes radially connecting the tread to the beads, with the axially outer edges of the tread mix being folded over onto the radially outer edges of the rubber mixes of the sidewalls to form a junction therewith at each of the axially outer edges of the tread, wherein each said junction comprises a circular junction J between the single rubber mix of the tread and the single rubber mix of the adjacent sidewall forming on the axially outer wall of the tire a substantially circular trace of radius RC relative to the axis of rotation of the tire, said radius RC lying, firstly, between 0.9 RS+0.1 RB and 0.8 RS+0.2 RB and, secondly, between RSS and 0.9 RSS+0.1 RB, where RS is the equatorial crown radius of the tread, RSS is the equatorial radius of the center line of the carcass reinforcement, and RB is the radius of the bead seat measured on the line perpendicular to the axis of rotation of the tire and passing through the center of gravity of the cross section of the bead wire, and wherein said junction J is not covered on the axially outer wall of the tire by a joint cover.