公开(公告)号：US20200079156A1

公开(公告)日：2020-03-12

申请号：US16616004

申请日：2018-05-09

Applicant: BRIDGESTONE CORPORATION

Inventor： Naoto OKAZAKI

IPC: B60C11/03 ,  B60C11/13

Abstract: A pneumatic tire includes rib-shaped land parts adjacent to each other with a circumferential groove therebetween, and raised-row-shaped projections projecting toward each other from both mutually opposed side wall surfaces of the adjacent rib-shaped land parts are provided to extend in the tread circumferential direction. As compared to a raised-row-shaped projection in an outermost-side circumferential groove located on a tire width direction outermost side, a raised-row-shaped projection in an inner adjacent circumferential groove located on tire width direction inner side of and adjacent to the outermost-side circumferential groove is formed at a shallower position near a tread surface between the tread surface and the groove bottom. As a result, it is possible to obtain suitable drainage properties according to the tire width direction positions of the circumferential grooves, while restraining an increase in rolling resistance, and to realize improved wet grip performance owing to an enlarged grounding area.

公开(公告)号：US20210229504A1

公开(公告)日：2021-07-29

申请号：US17053852

申请日：2019-05-10

Applicant: BRIDGESTONE CORPORATION

Inventor： Naoto OKAZAKI ,  Shoji OIDA

IPC: B60C11/24

Abstract: A tire wear prediction system (100) is provided with a wear prediction unit (110) for predicting a wear state of a tire mounted at a predetermined wheel position of a vehicle based on the traveling state of the vehicle, a change history acquisition unit (120) for acquiring a change history including the rotation of the wheel position on which the tire is mounted or a content of replacement with another tire, and a wear state correction unit (140) for correcting a reference of the wear state of the tire predicted by the wear prediction unit (110) based on the change history. The wear prediction unit (110) predicts the wear state of the tire based on the reference of the wear state corrected by the wear state correction unit (140).

公开(公告)号：US20210080354A1

公开(公告)日：2021-03-18

申请号：US16771487

申请日：2018-12-13

Applicant: BRIDGESTONE CORPORATION

Inventor： Shoji OIDA ,  Naoto OKAZAKI ,  Takeshi YANO ,  Tomotaka SAKIYAMA

IPC: G01M17/02 ,  B64C25/36 ,  G01N3/56

Abstract: A wear amount estimation device estimates plural kinds of wear energy depending on each of an internal pressure of aircraft tires, a load acting on the aircraft tires, a velocity of an aircraft, a slip angle caused in the aircraft tires, and a braking force of the aircraft, in accordance with each of these elements and wear energy EFR of the aircraft tires in a state of a free rolling run The wear amount estimation device estimates the wear amount wear of the aircraft tires in accordance with each of the calculated wear energy and a wear resistance R indicating a relationship between predetermined wear energy and a predetermined wear amount.

公开(公告)号：US20240198732A1

公开(公告)日：2024-06-20

申请号：US18592636

申请日：2024-03-01

Applicant: BRIDGESTONE CORPORATION

Inventor： Naoto OKAZAKI ,  Shoji OIDA

IPC: B60C11/24

CPC classification number: B60C11/246

Abstract: A tire wear prediction system (100) is provided with a wear prediction unit (110) for predicting a wear state of a tire mounted at a predetermined wheel position of a vehicle based on the traveling state of the vehicle, a change history acquisition unit (120) for acquiring a change history including the rotation of the wheel position on which the tire is mounted or a content of replacement with another tire, and a wear state correction unit (140) for correcting a reference of the wear state of the tire predicted by the wear prediction unit (110) based on the change history. The wear prediction unit (110) predicts the wear state of the tire based on the reference of the wear state corrected by the wear state correction unit (140).

公开(公告)号：US20160325588A1

公开(公告)日：2016-11-10

申请号：US15110475

申请日：2015-01-16

Applicant: BRIDGESTONE CORPORATION

Inventor： Naoto OKAZAKI

IPC: B60C9/02 ,  B60C13/00 ,  B60C3/04 ,  B60C15/00

CPC classification number: B60C9/0292 ,  B60C3/04 ,  B60C13/003 ,  B60C15/0027 ,  B60C2200/06

Abstract: A tire, wherein, in a cross section in the tire width direction thereof in a state where the tire has substantially not been inflated with no load applied thereon, provided that the maximum height in the tire radial direction of the carcass is h, a radius of curvature of the carcass within a height range 0.91 h-h measured from the radially innermost position of the carcass is R7, an acute inclination angle specifically defined in the height range 0.91 h-h is θ7, the intermediate value of a radius of curvature in the height range 0.82 h-0.91 h is R6, a radius of curvature in the height range 0.63 h-0.82 h is R5, and an acute inclination angle specifically defined in the height range 0.63 h-0.82 h is θ5, R7≧0.26h, θ7≧14°, R6 R6, and θ5≦23°.

Abstract translation: 一种轮胎，其中，在所述轮胎在没有载荷的情况下基本上未充气的状态下，在所述轮胎宽度方向的截面中，胎体的轮胎径向方向上的最大高度为h， 在从胎体的径向最内部位置测量的高度范围0.91hh内的胎体的曲率为R7，在高度范围0.91hh中特别限定的锐角倾角为θ7，高度范围内的曲率半径的中间值 0.82h-0.91h是R6，高度范围为0.63h-0.82h的曲率半径为R5，在0.63h-0.82h的高度范围内具体限定的锐角倾角为θ5，R7≥0.26h，θ7≥ 14°，R6 R6，θ5≤23°。

公开(公告)号：US20160288585A1

公开(公告)日：2016-10-06

申请号：US15038542

申请日：2014-06-12

Applicant: BRIDGESTONE CORPORATION

Inventor： Naoto OKAZAKI

IPC: B60C15/00 ,  B60C9/02 ,  B60C13/00 ,  B60C15/04 ,  B60C3/04

CPC classification number: B60C15/0027 ,  B60C3/04 ,  B60C9/0292 ,  B60C13/003 ,  B60C15/0063 ,  B60C15/04 ,  B60C2013/007 ,  B60C2200/06

Abstract: This disclosure aims to achieve reduction in rolling resistance and ensure excellent steering stability. In this disclosure, a tire widthwise maximum width of a carcass is 1.35 W or less; a tire outer surface has a recess; within a second height range h2 and on the outer side in a tire radial direction with respect to bead cores, a radius of curvature of the carcass is 0.46 h or more; within a third height range h3, the radius of curvature of the carcass is 0.62 h or more; during movement of a virtual point from a bead core height position Hbc toward a third height position H3, a tire gauge at the virtual point is reduced by a reduction amount of 0.025×G0/mm or less; and the tire gauge at the virtual point at the third height position H3 is 10% or more of the tire widthwise maximum width of the bead core.

Abstract translation: 本公开旨在实现滚动阻力的降低并且确保优良的操纵稳定性。 在本公开中，胎体的轮胎宽度方向最大宽度为1.35W以下; 轮胎外表面具有凹部; 在相对于胎圈芯的轮胎径向的第二高度范围h2内和外侧，胎体的曲率半径为0.46小时以上; 在第三高度范围h3内，胎体的曲率半径为0.62小时以上; 在虚拟点从胎圈芯高度位置Hbc向第三高度位置H3移动的过程中，虚拟点处的轮胎量规减少0.025×G0 / mm以下的减少量; 并且在第三高度位置H3处的虚拟点处的轮胎压力计是胎圈芯的轮胎宽度方向最大宽度的10％以上。

公开(公告)号：US20160059631A1

公开(公告)日：2016-03-03

申请号：US14781640

申请日：2014-04-01

Applicant: BRIDGESTONE CORPORATION

Inventor： Naoto OKAZAKI

IPC: B60C9/20 ,  B60C11/00 ,  B60C11/13

CPC classification number: B60C9/20 ,  B60C9/2009 ,  B60C9/22 ,  B60C9/28 ,  B60C11/0041 ,  B60C11/01 ,  B60C11/1307 ,  B60C11/1323 ,  B60C2009/2012 ,  B60C2009/2019

Abstract: A pneumatic tire including: on a tread of the tire, inclined belt layer and circumferential belt layer; and on the tread surface, a plurality of circumferential grooves extending in the tread circumferential direction, and shoulder land portions partitioned between the circumferential grooves located outermost in the tire width direction and tread ground contact ends. Positions of the tread surface that correspond to the outermost ends of the circumferential belt layer in the tire width direction are within the shoulder land portions, and the distance in the tire width direction between the outermost ends in the tire width direction of the circumferential belt layer and tire equator side ends of the shoulder land portions is 12% or more and 22% or less of a half of the width of the circumferential belt layer in tire width direction.

Abstract translation: 一种充气轮胎，包括：轮胎的胎面，倾斜带束层和周向带束层; 并且在胎面上具有沿胎面圆周方向延伸的多个周向槽，以及在轮胎宽度方向最外侧的周向沟槽与胎面接地端部之间划分的肩部陆部。 与周向带束层的轮胎宽度方向的最外端相对应的胎面的位置在肩部陆地部内，轮胎宽度方向上的轮胎宽度方向的距离在轮胎宽度方向上的周向带束层 轮胎赤道侧端部的轮胎宽度方向的周向带束层的宽度的一半以上为12％以上且22％以下。