Patent ID: 9156318
Filing Date: 2015-10-13
Classification: B60C

Abstract:
1. A tire comprising: at least one carcass-type reinforcing structure formed of at least one carcass reinforcing layer of mutually parallel reinforcing elements making an angle, with a circumferential direction of the tire, of less than 75° and in excess of 65° at least in a region of maximum axial width of the tire, and of less than 65° at least in an equatorial plane of the tire, said reinforcing elements being anchored on each side of the tire to a bead, each bead extending radially outwards in a form of a sidewall, the sidewalls extending radially outwards to meet a tread; and under the tread, and radially on the outside of the carcass-type reinforcing structure, a crown reinforcing structure comprising at least two superposed working layers of reinforcing elements making angles of between 10° and 55° with the circumferential direction, wherein, in the sidewalls, the tire comprises at least two axially adjacent portions of said carcass reinforcing layer, wherein the reinforcing elements of said portions of said carcass reinforcing layer are directed on each side of a meridian plane of the tire, wherein the reinforcing elements of said at least two superposed working layers cross from one working layer to a next working layer by an angle of 5° at most, wherein, at least in the equatorial plane, the reinforcing elements of said at least two superposed working layers cross the reinforcing elements of the carcass-type reinforcing structure at an angle greater than 40°, wherein said at least one carcass reinforcing layer comprises a part that is turned back around a bead wire in the bead, and wherein the end of said turned-back part of said carcass reinforcing layer is superposed on an end portion of said at least two superposed working layers so that the end portion of the two superimposed working layers is between, on one side, a portion of the carcass reinforcement layer between the bead wire and the equatorial plane and, on another side, said turned-back part of said carcass reinforcing layer, wherein said end of said turned-back part of said carcass reinforcing layer extends in the sidewalls, and wherein an overlap of the portion of the carcass reinforcement layer between the bead wire and the equatorial plane and of said turned-back part of said carcass reinforcing layer with said end of the end portion of the two superimposed working layers there between is positioned only in the sidewalls.