公开(公告)号：US20210107316A1

公开(公告)日：2021-04-15

申请号：US17036488

申请日：2020-09-29

Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.

Inventor： Satoko TSUJIBAYASHI ,  Yoshiyuki TAKADA ,  Satoshi TANAKA

IPC: B60C11/00 ,  B60C11/13

Abstract: A heavy duty pneumatic tire in which occurrence of uneven wear is inhibited is provided. In the tire, each shoulder land portion includes a groove wall portion forming a wall of a shoulder circumferential groove, and a cap portion located outward of the groove wall portion in an axial direction. A wear resistance index of the groove wall portion is lower than a wear resistance index of the cap portion. A ratio of a distance in the axial direction from an outer edge of the shoulder circumferential groove to a boundary between the groove wall portion and the cap portion on an outer surface of the shoulder land portion, to a width in the axial direction of the shoulder land portion, is not less than 20% and not greater than 30%.

公开(公告)号：US20140224398A1

公开(公告)日：2014-08-14

申请号：US14150794

申请日：2014-01-09

Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.

Inventor： Taro OKABE ,  Satoshi TANAKA ,  Ikuo ATAKE

IPC: B60C11/12

CPC classification number: B60C11/0306 ,  B60C11/125 ,  B60C11/1259 ,  B60C11/1263 ,  B60C11/1369 ,  B60C2011/0346 ,  B60C2011/0369 ,  B60C2011/0379 ,  B60C2200/06 ,  Y02T10/862

Abstract: A heavy duty pneumatic tire includes a tread portion provided with a pair of shoulder main grooves disposed axially outermost side, and at a center main groove between the shoulder main grooves to form a pair of middle portions. Each middle portion is provided with a middle sub groove, axially outer middle lateral grooves, and inner middle lateral grooves. The respective number of outer and inner middle lateral grooves are of from 40 to 50 in each middle portion. Each of the outer and inner middle lateral grooves includes a shallow bottom part having a depth smaller than that of the shoulder and center main grooves. The shallow bottom part is provided with a groove bottom sipe that extends along a longitudinal direction of each lateral grooves and includes a first portion, and a second portion having a depth smaller than the first portion.

Abstract translation: 重型充气轮胎包括：胎面部，其设置有沿轴向最外侧设置的一对胎肩主槽，并且在胎肩主槽之间的中心主槽处形成一对中间部。 每个中间部设有中间副槽，轴向外侧中间侧槽和内侧中间侧槽。 每个中间部分的外侧和内侧中间横向槽的数量分别为40〜50。 外侧和内侧中间横向槽中的每一个包括具有比肩部和中心主槽的深度小的深度底部。 浅底部设置有沿着每个横向槽的纵向方向延伸的槽底刀槽花纹，并且包括第一部分和具有比第一部分小的深度的第二部分。

公开(公告)号：US20210023887A1

公开(公告)日：2021-01-28

申请号：US16938531

申请日：2020-07-24

Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.

Inventor： Satoshi TANAKA

IPC: B60C11/01

Abstract: In a tire 12, a tread 14 includes a tread main body 44 and edge portions 46. A wear resistance index of each edge portion 46 obtained according to JIS K6264-2 is higher than that of the tread main body 44. An outer surface S of the tire 12 includes a tread surface ST, a pair of shoulder surfaces SH connected to the tread surface ST, and a pair of side surfaces SW connected to the shoulder surfaces SH. Each shoulder surface SH includes an outer surface formed by the edge portion 46, and a contour of each shoulder surface SH is represented by a circular arc having a center at an inner side.

公开(公告)号：US20130105053A1

公开(公告)日：2013-05-02

申请号：US13644016

申请日：2012-10-03

Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.

Inventor： Satoshi TANAKA

IPC: B60C11/12

CPC classification number: B60C11/1281 ,  B60C11/0306 ,  B60C11/11 ,  B60C2011/1209 ,  B60C2011/129

Abstract: A pneumatic tire comprises a tread portion provided with a tread element provided with a pair of sipes. Each sipe comprises a radially outer constant width part and a widening part extending radially inwardly from the constant width part while gradually increasing the width of the sipe and then extending to the radially inner end of the sipe while gradually decreasing the width of the sipe. Each of the paired sipes has an inside sidewall surface positioned toward the other of the paired sipes and an outside sidewall surface positioned away from the other of the paired sipes. The inside sidewall surface includes an inside curved bottom surface having a radius of curvature Rib. The outside sidewall surface includes an outside curved bottom surface having a radius of curvature Rob more than the radius of curvature Rib.

Abstract translation: 充气轮胎包括设置有设置有一对刀槽花纹的胎面元件的胎面部。 每个刀槽花纹包括径向外部恒定宽度部分和从恒定宽度部分径向向内延伸的加宽部分，同时逐渐增加刀槽花纹的宽度，然后延伸到刀槽花纹的径向内端，同时逐渐减小刀槽花纹的宽度。 配对的刀槽花纹中的每一个具有朝向所述成对刀槽花纹中的另一个定位的内侧壁表面和远离所述成对刀槽花纹另一个的外侧壁表面。 内侧壁表面包括具有曲率半径R b的内弯曲底表面。 外侧壁表面包括具有比曲率半径R b更大的曲率半径Rob的外弯曲底表面。

公开(公告)号：US20150151589A1

公开(公告)日：2015-06-04

申请号：US14555254

申请日：2014-11-26

Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.

Inventor： Satoshi TANAKA

IPC: B60C11/13 ,  B60C11/12

CPC classification number: B60C11/1315 ,  B60C11/0306 ,  B60C11/0309 ,  B60C11/125 ,  B60C11/13 ,  B60C2011/0353 ,  B60C2011/0355 ,  B60C2011/0365 ,  B60C2011/0367 ,  B60C2011/0388 ,  Y02T10/862

Abstract: A pneumatic tire is provided in the tread portion with a main groove and an axial groove. The groove-sidewall surface on each side of the main groove is formed by a circular-arc-like surface having a radius R1 of curvature and being convex to the groove center side. The groove-sidewall surface on each side of the axial groove is formed by a circular-arc-like surface having a radius R2 of curvature and being convex to the groove center side. The radius R2 of curvature of the groove-sidewall surface of the axial groove is more than the radius R1 of curvature of the groove-sidewall surface of the main groove.

Abstract translation: 在胎面部设有充气轮胎，其具有主槽和轴向槽。 主槽的两侧的槽侧壁面由具有曲率半径R1并且向槽中心侧凸出的圆弧状表面形成。 轴向槽两侧的槽侧壁面由圆弧状的曲面半径R2形成，并且与槽中心侧凸起。 轴向槽的槽 - 侧壁表面的曲率半径R2大于主槽的槽 - 侧壁表面的曲率的半径R1。

公开(公告)号：US20150007917A1

公开(公告)日：2015-01-08

申请号：US14271841

申请日：2014-05-07

Applicant: Sumitomo Rubber Industries, Ltd.

Inventor： Satoshi TANAKA

IPC: B60C11/03 ,  B60C11/12

CPC classification number: B60C11/125 ,  B60C11/0306 ,  B60C11/11 ,  B60C11/1236 ,  B60C2011/0346 ,  B60C2011/0348 ,  B60C2011/0358 ,  B60C2011/036 ,  B60C2011/0362 ,  B60C2011/0372 ,  B60C2011/1213

Abstract: A pneumatic tire is provided with a center land portion between two zigzag crown main grooves, and two middle land portions between two zigzag shoulder main grooves and the two crown main grooves. Each center block is provided with center sipes between which a central part defining the maximum width of the center block is formed. The middle land portion is divided into middle blocks by alternate, oppositely inclined first middle axial grooves and second middle axial grooves. Each middle block is provided with nonparallel middle sipes.

Abstract translation: 充气轮胎在两个之字形冠主槽之间设置有中心陆部，两个之字形肩主槽和两个冠主槽之间的两个中间陆部。 每个中心块设置有中心刀槽花纹，在其间形成限定中心块的最大宽度的中心部分。 中间地面部分通过交替的，相对倾斜的第一中间轴向槽和第二中间轴向槽分成中间块。 每个中间块都配有不平行的中间刀槽花纹。

公开(公告)号：US20140345767A1

公开(公告)日：2014-11-27

申请号：US14265618

申请日：2014-04-30

Applicant: Sumitomo Rubber Industries, Ltd.

Inventor： Satoshi TANAKA ,  Tadashi ITO

IPC: B60C11/12 ,  B60C11/03

CPC classification number: B60C11/1263 ,  B60C11/0306 ,  B60C11/1204 ,  B60C11/1369 ,  B60C2011/1213 ,  B60C2011/1268 ,  B60C2200/06

Abstract: A pneumatic tire comprises a tread portion provided with blocks each provided with a first variable depth sipe and a second variable depth sipe each having both axial ends opened at edges of the block on both sides thereof in the tire axial direction. In each block, a shallow portion of the first variable depth sipe overlaps, in the tire axial direction, with a deep main portion of the second variable depth sipe. an axial groove dividing the blocks is provided with a tie bar overlapping, in the tire axial direction, with the deep main portion of the adjacent variable depth sipe.

Abstract translation: 充气轮胎包括具有块的胎面部，每个块设置有第一可变深度刀槽花纹和第二可变深度刀槽花纹，所述第二可变深度刀槽花纹在轮胎轴向方向上在其两侧的边缘处具有两个轴向端部。 在每个块中，第一可变深度刀槽刀的浅部在轮胎轴向与第二可变深度刀槽花纹的深主要部分重叠。 分割块的轴向槽设置有在轮胎轴向与重叠的可变深度刀槽花纹的深部主体重叠的连杆。

公开(公告)号：US20130105052A1

公开(公告)日：2013-05-02

申请号：US13654628

申请日：2012-10-18

Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.

Inventor： Satoshi TANAKA

IPC: B60C11/12 ,  B60C11/117

CPC classification number: B60C11/032 ,  B60C11/0306 ,  B60C2011/0344 ,  B60C2011/0346 ,  B60C2011/0348 ,  B60C2200/06

Abstract: A heavy duty pneumatic tire includes main grooves that extend in the tire circumferential direction. A siped block is provided with at least one sipe to circumferentially subdivide the block into at least two block pieces that include at least one holed block piece provided with at least one small hole. Each small hole extends radially inwardly from the ground contacting surface of the holed block piece to its bottom at a depth in a range of from 30 to 100% of a depth of the main grooves. Each small hole has a round cross-sectional shape to have a maximum radius in a range of from 0.6 to 2.0 mm at the opening of the small hole in the ground contacting top surface. The total opening area of the at least one small hole is 2 to 12% of the overall area of the ground contacting top surface.

Abstract translation: 重型充气轮胎包括沿轮胎周向延伸的主槽。 一个啜饮块设置有至少一个刀槽花纹，以将块块周向细分成至少两个块件，其包括设置有至少一个小孔的至少一个带孔块。 每个小孔从开孔块的接地表面径向向内延伸到其底部，深度在主槽的深度的30至100％的范围内。 每个小孔具有圆形横截面形状，使得在地面接触顶表面的小孔的开口处具有在0.6至2.0mm范围内的最大半径。 至少一个小孔的总开口面积是接地顶面整体面积的2〜12％。