Patent ID: 9421830
Filing Date: 2016-08-23
CPC Classification: B60C

Claim Text:
1. A tire for a heavy vehicle of construction plant type comprising two beads intended to come into contact with a rim, a carcass reinforcement comprising at least one carcass reinforcement layer made up of metallic reinforcing elements, the carcass reinforcement layer comprising a main part wrapped, within each bead, from the inside towards the outside of the tire, around a bead wire to form a turn-up, a distance (d) between the turn-up and the main part decreasing continuously, radially towards the outside, from the bead wire, as far as a minimum distance (d 1 ), then increasing continuously as far as a maximum distance (d 2 ), the turn-up comprising an end covered by an edging element made of a polymer edging material, each bead comprising a filling element extending the bead wire radially towards the outside and made of at least one polymer filling material, the polymer filling material in contact with the edging element having an elastic modulus at 10% elongation that is lower than the elastic modulus at 10% elongation of the polymer edging material, wherein a transition element, made of a polymer transition material, is at least partially in contact, on an axially outer face thereof, with the polymer edging material and, on an axially inner face thereof, with a polymer filling material, wherein a radially outer and radially inner end of the transition element are respectively radially on the outside and radially on the inside of the end of the turn-up and wherein the elastic modulus at 10% elongation of the polymer transition material is somewhere between the respective elastic moduluses at 10% elongation of the polymer edging material and of the polymer filling material with which the transition element is in contact.