公开(公告)号：US10245889B2

公开(公告)日：2019-04-02

申请号：US14648304

申请日：2013-11-28

Applicant: BRIDGESTONE CORPORATION

Inventor： Shinsaku Katayama ,  Eisuke Seta ,  Yoshio Kaji ,  Masafumi Koide ,  Takayuki Kurata ,  Hiroyuki Katsuno ,  Masakazu Amano ,  Ataka Takei

IPC: B60C11/03 ,  B60C11/13 ,  B60C11/12 ,  B60C5/00

Abstract: A pneumatic tire (10), which has, in the surface of the tread (11), lug grooves (15) on one side extending from one axial edge towards the axial center of the tire in such a manner as to intersect with the circumferential direction of the tire and lug grooves (15) on the other side extending in a symmetrically opposite direction from the axial center towards the other axial edge of the tire, has at least one circumferential groove (12) extending circumferentially around the tire. Also, circumferential grooves (12, 13a, 13b) are so formed as to satisfy a relationship of “1≤(S/L)≤3” where L is the axial length of the central region, which is the region enclosed by two straight parallel lines each passing through the center between the contact width center (CL) and the contact edge with the shoulder regions being the regions axially outside of the parallel lines, and S is the total of the groove areas of the circumferential grooves (12, 13a, 13b) disposed in the central region. Therefore, the pneumatic tire (10) not only secures the steering stability performance on wet road surfaces, but also improves the steering stability and wear resistance performance on dry road surfaces.

公开(公告)号：US20150290978A1

公开(公告)日：2015-10-15

申请号：US14441545

申请日：2013-10-25

Applicant: BRIDGESTONE CORPORATION

Inventor： Hiroyuki Katsuno ,  Satoshi Ishikawa ,  Shinsaku Katayama ,  Eisuke Seta ,  Yoshio Kaji ,  Takayuki Kurata

IPC: B60C11/11 ,  B60C11/04 ,  B60C5/00 ,  B60C11/13

CPC classification number: B60C11/11 ,  B60C5/00 ,  B60C11/0302 ,  B60C11/04 ,  B60C11/1236 ,  B60C11/13 ,  B60C11/1369 ,  B60C11/1384 ,  B60C2011/0344 ,  B60C2011/0346 ,  B60C2011/1213

Abstract: A pneumatic tire, comprising: a tread surface; a plurality of grooves formed in the tread surface, including a plurality of widthwise grooves each extending from a corresponding tread end on the inner side in the tread width direction and a plurality of circumferential grooves each extending in the tread circumferential direction to intersect the widthwise grooves; blocks demarcated by the plurality of grooves; and a chamfered portion formed at a corner, on the trailing edge side and on the outer side in the tread width direction, of each block.

Abstract translation: 一种充气轮胎，包括：胎面表面; 形成在所述胎面表面上的多个槽，包括从胎面宽度方向的内侧的相应的胎面端部延伸的多个宽度方向槽，以及在胎面周向上延伸的多个周向槽， ; 由多个槽划分的块; 以及形成在每个块的角落，后缘侧和胎面宽度方向的外侧的倒角部。

公开(公告)号：US10507696B2

公开(公告)日：2019-12-17

申请号：US14435536

申请日：2013-10-23

Applicant: BRIDGESTONE CORPORATION

Inventor： Yoshio Kaji ,  Shinsaku Katayama ,  Eisuke Seta ,  Takayuki Kurata

IPC: B60C11/12

Abstract: A pneumatic tire, having a plurality of sipes formed in land portions of a tread thereof so as to each extend in the tire width direction, characterized in that: in a cross section of the land portion orthogonal to the sipe extending direction, provided that an imaginary sipe main line links two ends in the tire radial direction of each sipe, at least two of the sipes are “inclined sipes” each having the sipe main line inclined with respect to the tire radial direction; each inclined sipe has inner bent portions each protruding with respect to the sipe main line with peaks positioned deeper than 20% of the sipe depth; and the sipe main line(s) of at least one of the inclined sipes are inclined in a direction opposite, with respect to the tire radial direction, to the sipe main line of any of the other inclined sipes.

公开(公告)号：US09802444B2

公开(公告)日：2017-10-31

申请号：US14648563

申请日：2013-11-28

Applicant: BRIDGESTONE CORPORATION

Inventor： Shinsaku Katayama ,  Eisuke Seta ,  Yoshio Kaji ,  Masafumi Koide ,  Takayuki Kurata ,  Hiroyuki Katsuno ,  Masakazu Amano ,  Ataka Takei

IPC: B60C11/12 ,  B60C11/04 ,  B60C11/13 ,  B60C11/11 ,  B60C11/03

CPC classification number: B60C11/04 ,  B60C11/0302 ,  B60C11/0309 ,  B60C11/0332 ,  B60C11/11 ,  B60C11/12 ,  B60C11/1236 ,  B60C11/13 ,  B60C11/1369 ,  B60C2011/0341 ,  B60C2011/0344 ,  B60C2011/0346 ,  B60C2011/0365 ,  B60C2011/0369 ,  B60C2011/0393 ,  B60C2011/1213 ,  B60C2011/1268

Abstract: A pneumatic tire (10) has, in the surface of the tread (11), a central circumferential groove (12) located at the center of the contact patch width and extending circumferentially around the tire, a plurality of longitudinal grooves (13 (13a, 13b)) formed on the axially outside of the central circumferential groove (12), lug grooves (15), and blocks (16 (16a to 16c)) defined by the central circumferential groove (12), the longitudinal grooves (13), and the lug grooves (15). Each of the lug grooves (15) is formed such that its width in the shoulder region is greater than its width in the central region, and the sum of the groove area of the central circumferential groove (12) and the groove area of the longitudinal grooves (13) is smaller than the area of the lug grooves (15). As a result, the pneumatic tire (10) not only secures the wet braking performance and wear resistance performance on paved roads, but also improves the acceleration performance and braking performance and the steering stability performance on snowy roads.

公开(公告)号：US09688105B2

公开(公告)日：2017-06-27

申请号：US14441545

申请日：2013-10-25

Applicant: BRIDGESTONE CORPORATION

Inventor： Hiroyuki Katsuno ,  Satoshi Ishikawa ,  Shinsaku Katayama ,  Eisuke Seta ,  Yoshio Kaji ,  Takayuki Kurata

IPC: B60C11/11 ,  B60C11/13 ,  B60C11/03 ,  B60C11/04 ,  B60C5/00 ,  B60C11/12

CPC classification number: B60C11/11 ,  B60C5/00 ,  B60C11/0302 ,  B60C11/04 ,  B60C11/1236 ,  B60C11/13 ,  B60C11/1369 ,  B60C11/1384 ,  B60C2011/0344 ,  B60C2011/0346 ,  B60C2011/1213

Abstract: A pneumatic tire, comprising: a tread surface; a plurality of grooves formed in the tread surface, including a plurality of widthwise grooves each extending from a corresponding tread end on the inner side in the tread width direction and a plurality of circumferential grooves each extending in the tread circumferential direction to intersect the widthwise grooves; blocks demarcated by the plurality of grooves; and a chamfered portion formed at a corner, on the trailing edge side and on the outer side in the tread width direction, of each block.

公开(公告)号：US20150266346A1

公开(公告)日：2015-09-24

申请号：US14435536

申请日：2013-10-23

Applicant: BRIDGESTONE CORPORATION

Inventor： Yoshio Kaji ,  Shinsaku Katayama ,  Eisuke Seta ,  Takayuki Kurata

IPC: B60C11/12

CPC classification number: B60C11/1218 ,  B60C11/124 ,  B60C11/1259 ,  B60C2011/1213

Abstract: A pneumatic tire, having a plurality of sipes formed in land portions of a tread thereof so as to each extend in the tire width direction, characterized in that: in a cross section of the land portion orthogonal to the sipe extending direction, provided that an imaginary sipe main line links two ends in the tire radial direction of each sipe, at least two of the sipes are “inclined sipes” each having the sipe main line inclined with respect to the tire radial direction; each inclined sipe has inner bent portions each protruding with respect to the sipe main line with peaks positioned deeper than 20% of the sipe depth; and the sipe main line(s) of at least one of the inclined sipes are inclined in a direction opposite, with respect to the tire radial direction, to the sipe main line of any of the other inclined sipes.

Abstract translation: 一种充气轮胎，其具有在轮胎宽度方向上各自延伸的胎面的胎面部形成的多个刀槽花纹，其特征在于，在所述胎面部的与所述刀槽花纹延伸方向正交的截面中， 虚拟刀槽花纹主线连接每个刀槽花纹的轮胎径向的两端，至少两个刀槽花纹是相对于轮胎径向倾斜的刀槽花纹主线的“倾斜刀槽花纹” 每个倾斜刀槽花纹具有相对于刀槽花纹主线突出的内部弯曲部分，其峰值位于刀槽花纹深度的20％以上。 并且至少一个倾斜刀槽花纹的刀槽花纹主线在相对于轮胎径向相反的方向上倾斜到任何另一个倾斜刀槽花纹的刀槽花纹主线。