Patent ID: 6598643
Filing Date: 2003-07-29
Classification: B60C,Y10T

Abstract:
A tire, intended to be mounted on a rim having seats which form an angle &ggr; with an axis of rotation such that 0Â°&lE;&ggr;&lE;16Â°, and rim flanges which have rounded hooks, comprising a tread joined to two beads devoid of bead wires by two sidewalls and at least one carcass reinforcement formed of at least one ply of reinforcement elements, and having in each bead a meridian profile which is curved axially and radially from outside to inside to form an axially inner edge located in an angle open axially and radially towards the inside, one side of the angle is parallel to the axis of rotation, and the angle having a value of at most 25Â°, said at least one carcass reinforcement being reinforced in each bead at least radially to the outside and axially to the inside by at least one first continuous additional layer, composed of at least one ply formed of inextensible reinforcement elements forming an angle of between âˆ’2.5Â° and +2.5Â° with the circumferential direction, the tire characterized in that said at least one carcass reinforcement is also, radially to the outside and axially to the inside, reinforced by at least one second continuous additional layer, composed of at least one ply formed of inextensible radial reinforcement elements, the two additional layers having meridian profiles substantially parallel to the meridian profile of the at least one carcass reinforcement in the bead and the radially upper ends of said first and second additional layers being distant from the axis of rotation by amounts at least equal, respectively, to 0.96 times and 1.20 times the distance between said axis and a point of the corresponding rim flange which is farthest from said axis of rotation.