公开(公告)号：US20210197618A1

公开(公告)日：2021-07-01

申请号：US17059213

申请日：2019-05-15

Applicant: BRIDGESTONE CORPORATION

Inventor： Masahiro KATAYAMA ,  Tatsurou UCHIDA ,  Yoshifumi MATSUMOTO ,  Kenji MATSUI

IPC: B60C5/01 ,  B60C15/02 ,  B60C15/04 ,  B60C1/00

Abstract: A tire includes a tire frame member that has bead portions in which bead cores are embedded in a resin material and side portions that comprise the resin material and are continuous with tire radial direction outer sides of the bead portions, wherein assuming that T1 is a thickness of thick-walled portions of the tire frame member that are adjacent to the tire radial direction outer sides of the bead cores and that T2 is a thickness of the side portions, T1>T2, a thickness of the tire frame member decreases from T1 to T2 between the thick-walled portions and the side portions, and a position at which the thickness of the tire frame member starts to decrease from T1 to T2 is on a tire radial direction outer side of tire radial direction outer ends of rim flanges of a rim on which the bead portions are mounted.

公开(公告)号：US20190152260A1

公开(公告)日：2019-05-23

申请号：US16097618

申请日：2017-05-18

Applicant: BRIDGESTONE CORPORATION

Inventor： Yoshihide KOUNO ,  Yoshifumi MATSUMOTO ,  Kenji MATSUI ,  Seiji KON

IPC: B60C5/01 ,  B60C9/22

Abstract: A tire includes a tire frame member made of a resin material; a top tread disposed outside the tire frame member in a tire radial direction; a belt layer disposed between the tire frame member and the top tread, the width dimension BW of the belt layer in a tire axial direction being in a range of from 85 to 105% of the ground width dimension TW of the top tread; and a belt reinforcement layer disposed at end portions of the belt layer in a tire width direction, the belt reinforcement layer having lower stiffness than the belt layer.

公开(公告)号：US20190105947A1

公开(公告)日：2019-04-11

申请号：US16092442

申请日：2017-04-20

Applicant: BRIDGESTONE CORPORATION

Inventor： Yoshihide KOUNO ,  Kenji MATSUI ,  Yoshifumi MATSUMOTO ,  Seiji KON

IPC: B60C5/01 ,  B60C5/00 ,  B60C11/01 ,  B60C13/00 ,  B60C9/22

Abstract: A tire includes a tire frame member formed of a resin material, a belt layer, and a top tread, in which in an outer contour of the tire as viewed in a cross section along a tire rotation axis, a ground end side of the top tread is a shoulder portion having a small arc portion which is convex toward an outer side of the tire and has a radius of curvature smaller than the radius of curvature of the top tread on a tire equatorial plane side. In addition, in the outer contour of the tire as viewed in the cross section along the tire rotation axis, a ground angle θ of a tangent line of the small arc portion at a height of 80% of a tire cross section height SH with respect to the tire axial direction is set within a range of from 47° to 52°.

公开(公告)号：US20190143755A1

公开(公告)日：2019-05-16

申请号：US16098130

申请日：2017-05-18

Applicant: BRIDGESTONE CORPORATION

Inventor： Yoshihide KOUNO ,  Kenji MATSUI ,  Yoshifumi MATSUMOTO ,  Seiji KON

IPC: B60C9/22 ,  B60C9/00

Abstract: A tire includes a tire frame member made of a resin material; a top tread disposed outside the tire frame member in a tire radial direction; and a belt layer disposed between the tire frame member and the top tread, the belt layer constituting of a center area at a middle in a tire width direction and shoulder areas at both sides of the center area in the tire width direction, a width dimension BCW of the center area in a tire axial direction being in a range of from 85 to 105% of a ground width dimension TW of the top tread. In a case in which Hc represents stiffness of the center area, and Hs represents stiffness of the shoulder area, Hc>Hs.