公开(公告)号：US20210252913A1

公开(公告)日：2021-08-19

申请号：US17255421

申请日：2019-06-17

Applicant: BRIDGESTONE CORPORATION

Inventor： Masashi YAMAGUCHI ,  Keita YUMII

IPC: B60C3/04 ,  B60C17/00 ,  B60C5/14

Abstract: At a run-flat tire, given that an average radius of curvature of a case line between an intersection point (0.1 SHp) and an intersection point (0.2 SHp) when viewed in a cross-section along a tire rotation axis is radius R1, and that an average radius of curvature of the case line between an intersection point (0.4 SHp) and an intersection point (0.6 SHp) when viewed in the cross-section along the tire rotation axis is radius R2, ratio R2/R1 is set to be greater than 0.3.

公开(公告)号：US20140124111A1

公开(公告)日：2014-05-08

申请号：US14153330

申请日：2014-01-13

Applicant: Bridgestone Corporation

Inventor： Keita YUMII

IPC: B60C11/03

CPC classification number: B60C11/03 ,  B60C11/0306 ,  B60C11/0318 ,  B60C11/0332 ,  B60C11/04 ,  B60C11/12 ,  B60C2011/0365 ,  B60C2011/0376 ,  B60C2011/0381 ,  B60C2011/0383 ,  B60C2011/0388 ,  B60C2011/039 ,  B60C2011/1209

Abstract: A pneumatic tire reduces the columnar resonance noise of the tire while controlling the lowering of wet performances, wherein four circumferential grooves continuously extending in the circumferential direction of the tire are disposed in a treading face and a plurality of lateral grooves each having one end opened to the circumferential groove and terminated in a land portion are formed with respect to two circumferential grooves among the four circumferential grooves, and these lateral grooves and the respective circumferential grooves have such a groove width that both groove walls of the groove do not contact with each other in a ground contact face and one or more lateral groove are always completely included in the ground contact face, and an extending length of a portion of each lateral groove in the ground contact face having a groove width of the lateral groove corresponding to not less than 30% of a groove width of the circumferential groove is made not less than 40% of an extending length of the circumferential groove in the ground contact face.

Abstract translation: 充气轮胎在控制湿润性能的降低的同时降低轮胎的柱状共振噪声，其中沿轮胎周向连续延伸的四个周向槽设置在踩踏面和多个横向槽中，每个横向槽的一端敞开 在四个周向沟槽中，相对于两个周向槽形成周边槽并且在陆部中终止的周向槽，并且这些横向槽和各个周向槽具有这样的槽宽度，使得槽的两个槽壁彼此不接触 在地面接触面和一个或多个横向槽中总是完全包含在接地面中，并且接地面中的每个横向槽的一部分的延伸长度具有横向槽的槽宽度，该宽度对应于不小于 圆周槽的槽宽的30％为例如40％以上 在地面接触面的周向槽的长度。

公开(公告)号：US20220410632A1

公开(公告)日：2022-12-29

申请号：US17756563

申请日：2020-06-22

Applicant: BRIDGESTONE CORPORATION

Inventor： Keita YUMII

IPC: B60C11/03 ,  B60C11/12

Abstract: A pneumatic tire of the present disclosure includes two or more circumferential main grooves extending in a tire circumferential direction on a tread surface, and in a land portion defined by the two circumferential main grooves, a widthwise sipe extending in a tire width direction from each of the two circumferential main grooves, a circumferential sipe extending in the tire circumferential direction, and a hole connected to the circumferential sipe. The widthwise sipe is connected to the circumferential sipe or the hole, the widthwise sipe includes a first widened portion, on a sipe bottom side, at which a sipe width is larger than on the tread surface side, the circumferential sipe includes a second widened portion, on a sipe bottom side, at which a sipe width is larger than on the tread surface side, and the hole, the first widened portion, and the second widened portion are connected.

公开(公告)号：US20170028792A1

公开(公告)日：2017-02-02

申请号：US15302672

申请日：2015-03-27

Applicant: BRIDGESTONE CORPORATION

Inventor： Keita YUMII

IPC: B60C15/06 ,  B60C19/00

CPC classification number: B60C15/0628 ,  B60C3/06 ,  B60C5/00 ,  B60C15/06 ,  B60C19/001 ,  B60C2015/0696

Abstract: This tire is provided with reinforcing cord layers that reinforce a bead part. The reinforcing cord layers are such that at the bead part at the inner side of vehicle mounting, the number of layers of the reinforcing cord layers with respect to a bead filler is greater at the inner side in the direction of tire width compared to the outer side in the direction of tire width with respect to the bead filler, and at the bead part at the outer side of vehicle mounting, the number of layers of the reinforcing cord layers with respect to the bead filler is greater at the outer side in the direction of tire width compared to the inner side in the direction of tire width with respect to the bead filler.

Abstract translation: 该轮胎设有加固帘线层，加强胎圈部。 加强帘线层使得在车辆安装的内侧的胎圈部分处，相对于胎圈填料的加强帘线层的层数在轮胎宽度方向的内侧比外侧 侧面相对于胎圈填料的轮胎宽度方向，并且在车辆安装的外侧的胎圈部分处，相对于胎圈填料的增强帘线层的层数在 相对于胎圈填料，轮胎宽度方向与轮胎宽度方向的内侧相比。

公开(公告)号：US20230001746A1

公开(公告)日：2023-01-05

申请号：US17756777

申请日：2020-07-10

Applicant: BRIDGESTONE CORPORATION

Inventor： Keita YUMII

IPC: B60C11/12 ,  B60C11/03

Abstract: A tire according to the present disclosure is a tire including, in a tread surface, a tread land portion partitioned by a partitioning groove or by the partitioning groove and a tread edge. The tread land portion includes a sipe extending from a surface of the tread land portion inwardly in a tire radial direction. The sipe includes a widened portion with a larger sipe width than a position adjacent in a sipe longitudinal direction. The cross-sectional area of the widened portion in cross section perpendicular to the tire radial direction is larger on inside than on outside in the tire radial direction.

公开(公告)号：US20210146734A1

公开(公告)日：2021-05-20

申请号：US16771218

申请日：2018-12-13

Applicant: BRIDGESTONE CORPORATION

Inventor： Keita YUMII

IPC: B60C17/00

Abstract: The pneumatic tire includes: a pair of bead portions; a pair of sidewall portions; a tread portion; a carcass; a reinforcing rubber layer, a tire widthwise cross-section of the reinforcing rubber layer having a substantially crescent shape; an inclined belt including at least one inclined belt layer formed by a plurality of cords extending at an inclination to a tire circumferential direction and covered with rubber; and an inner liner provided on an inner peripheral surface of a tire body in at least the tread portion. In a tire widthwise cross-sectional view, an edge of the inner liner is positioned farther outward in the tire radial direction than a tire maximum width position of the pneumatic tire and farther inward in the tire radial direction than a perpendicular from a tire widthwise edge of the inclined belt to the inner peripheral surface of the tire body.

公开(公告)号：US20220410633A1

公开(公告)日：2022-12-29

申请号：US17756564

申请日：2020-06-22

Applicant: BRIDGESTONE CORPORATION

Inventor： Keita YUMII

IPC: B60C11/03 ,  B60C11/12

Abstract: A pneumatic tire includes circumferential main grooves extending in the tire circumferential direction on the tread surface, and in widthwise outermost land portions, widthwise grooves extending from the tread edges inward in the tire width direction and widthwise sipes extending from the tire widthwise inner edge of the widthwise grooves inward in the tire width direction and connecting to the circumferential main groove. Each widthwise sipe includes a widened portion, by the sipe bottom, with a larger sipe width than at the tread surface. A rectangle ratio is 0.8 or more. Each widthwise sipe extends at a first angle relative to the tire width direction in plan view of the tread surface. In a tire radial region containing the widened portion, the widened portion extends at a second angle smaller than the first angle relative to the tire width direction, or partially extends along the tire width direction.

公开(公告)号：US20220410628A1

公开(公告)日：2022-12-29

申请号：US17756655

申请日：2020-06-22

Applicant: BRIDGESTONE CORPORATION

Inventor： Keita YUMII

IPC: B60C11/03 ,  B60C11/12

Abstract: A pneumatic tire includes circumferential main grooves extending in the tire circumferential direction on the tread surface, and in widthwise outermost land portions, widthwise grooves extending from the tread edges inward in the tire width direction and widthwise sipes extending from the tire widthwise inner edge of the widthwise grooves inward in the tire width direction and connecting to the circumferential main groove. Each widthwise sipe includes a widened portion, by the sipe bottom, with a larger sipe width than at the tread surface. A rectangle ratio is less than 0.8. In a tire radial region containing the widened portion, the widened portion includes a portion extending at a first angle relative to the tire width direction. In plan view of the tread surface, each widthwise sipe extends along the tire width direction or at a second angle smaller than the first angle relative to the tire width direction.

公开(公告)号：US20220227179A1

公开(公告)日：2022-07-21

申请号：US17614617

申请日：2020-05-27

Applicant: BRIDGESTONE CORPORATION

Inventor： Keita YUMII

IPC: B60C11/12

Abstract: A pneumatic tire includes, on a tread surface, circumferential main grooves extending in the tread circumferential direction, rib-like land portions defined between circumferential main grooves adjacent in the tread width direction or by circumferential main grooves and tread edges, and resonators, arrayed circumferentially in the rib-like land portions, each including a narrowed neck and an air chamber. The narrowed neck is a widthwise sipe opening at one end to the circumferential main groove that defines the rib-like land portion, extending therefrom in the tread width direction, and terminating at another end within the rib-like land portion. The air chamber is a circumferential sipe connected to the other end of the widthwise sipe, extending in the tread circumferential direction, terminating at both ends within the rib-like land portion, and including a first widened portion, at the sipe bottom, with a larger sipe width than at the tread surface side.