公开(公告)号：US20220324269A1

公开(公告)日：2022-10-13

申请号：US17639188

申请日：2020-07-27

申请人： COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN

发明人： OLIVIER REIX ,  FLORIAN LACHAL ,  STEPHANE QUENARD

IPC分类号： B60C15/04

摘要： A bead core for a tire, which is substantially rotationally symmetrical about an axis, comprises a plurality of windings of at least one metallic wire with diameter d arranged next to one another in a direction P forming an angle α with the axial direction in a radial sectional half-plane R, on N layers superposed on one another in the radial direction, wherein: α ranges from 0° to 10°; in the sectional half-plane R, the windings form a structure consisting of a base structure and a cap structure, wherein the radially inner base structure in the shape of a parallelogram is directly in contact in the radial direction with the radially outer cap structure in the shape of a trapezium. The product of the diameter d times the number of windings L ranges from 13.0 mm to 25.0 mm, and N is less than or equal to 16.