Patent ID: 9744813
Date: 2017-08-29
CPC Classifications: B60C,Y10T

Claim:
1. A tire for a heavy vehicle with a radial carcass reinforcement comprising at least one layer of reinforcing elements, the tire comprising: a crown reinforcement radially capped by a tread, said tread being connected to two beads by two sidewalls, each of said two beads comprising a bead wire for anchoring said carcass reinforcement into said two beads by wrapping said at least one layer of reinforcing elements around said bead wires, wherein, in a radial plane, in a first region of the exterior surface of each of said two beads, with said first region being the entire area of the exterior surface of each of said two beads that is radially on the inside of the radially innermost point of said at least one layer of carcass reinforcement and axially on the outside of the geometric center of said bead wire, the radius of curvature at each point on said first region of the exterior surface is greater than the radius of curvature at the point of orthogonal projection of said each point onto said at least one layer of carcass reinforcement, wherein the first region and the area of the orthogonal projection are both arcuate, wherein said bead wires have a ratio of axial width to radial height that is greater than 1.5, and wherein over at least 30 mm of the base of each of said two beads, an angle formed by the base with a direction parallel to the direction of the axis of rotation of the tire is between 6 and 7.5°.