Patent ID: 6425429
Filing Date: 2002-07-30
Classification: B60C,C21D,D07B,Y10S,Y10T

Abstract:
A tire having sidewalls terminating in beads, said tire having a carcass reinforcement which passes into the sidewalls and joins the beads, at least one of said beads comprising:carcass reinforcing elements extending upwardly from the radially bottom part of the bead towards the sidewall, said carcass reinforcing elements being arranged in alignments forming a partial conical frustrum, the axis of which coincides substantially with the axis of rotation of the tire, and at least two piles of circumferential carcass anchoring elements laterally bordering the carcass reinforcing elements, each pile embodying a helical winding of said carcass anchoring elements, the radially lowermost part of the axially outermost pile being radially higher than the radially lowermost part of the axially inwardly adjacent pile so that there is an ever-increasing radial thickness of rubber product in the bead between the lowermost part of each pile and the radially lower surface of the bead from the axially innermost pile with respect to the next axially outer pile, starting from the axially innermost pile.