公开(公告)号：US11926182B2

公开(公告)日：2024-03-12

申请号：US17416825

申请日：2019-12-14

Applicant: BRIDGESTONE CORPORATION

Inventor： Eiji Ichihara ,  Yusuke Nakamura

IPC: B60C9/28 ,  B60C9/00 ,  B60C9/22 ,  B60C9/26

CPC classification number: B60C9/28 ,  B60C9/0042 ,  B60C9/22 ,  B60C9/2204 ,  B60C9/263 ,  B60C2200/02

Abstract: A first belt cord made of organic fibers of a spirally wound belt layer extends at an angle of equal to or less than 5° relative to a tire equatorial plane, a second belt cord made of organic fibers of a zigzag belt layer extends at an inclination of an angle of 2° to 45° relative to the tire equatorial plane, to folding back points where the second belt cord is folded back at each width directional end edge of the zigzag belt layer, and a relation of N95>N50 is satisfied. N50 is the number of stacked belt layers of the spirally wound belt layers, at 50% of half the length of a maximum belt width of belt layers from the tire equatorial plane. N95 is the number of stacked belt layers of the spirally wound belt layers, at 95% of half the length of the maximum belt.