公开(公告)号：US10766310B2

公开(公告)日：2020-09-08

申请号：US15710304

申请日：2017-09-20

Applicant: Sumitomo Rubber Industries, Ltd.

Inventor： Tomoyuki Kujime ,  Hiroshi Okagawa

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

Abstract: A pneumatic tire includes a tread portion provided with a crown land region and middle land regions provided with only sipes, and shoulder land regions provided with shoulder rug grooves and connecting sipes. The tread portion is provided with a crown tread profile having a radius of curvature, a middle tread profile having a radius of curvature, and a shoulder tread profile having a radius of curvature which satisfy a magnitude relation Rc>Rm>Rs. First interconnecting positions at which the crown tread profile connects with the middle tread profiles are positioned in the respective middle land regions. Second interconnecting positions at which the middle tread profiles connect with the shoulder tread profiles are positioned in the respective shoulder land regions and axially inside the inner ends of the shoulder rug grooves.

公开(公告)号：US11135877B2

公开(公告)日：2021-10-05

申请号：US16106842

申请日：2018-08-21

Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.

Inventor： Tomoyuki Kujime ,  Hiroshi Okagawa

IPC: B60C11/03 ,  B60C11/12

Abstract: A tire includes an outboard tread edge and an inboard tread edge to be located on an outboard side and an inboard side of a vehicle, respectively, circumferentially and continuously extending main grooves, and land portions divided by the main grooves. The land portions include an outboard shoulder land portion, an outboard middle land portion, an inboard shoulder land portion, and an inboard middle land portion. Each of the outboard shoulder land portion, the inboard shoulder land portion, and the inboard middle land portion is provided with axially extending lateral grooves. The outboard middle land portion is provided with outboard middle lateral grooves extending from an edge of the outboard middle land portion on the outboard tread edge side toward the inboard tread edge. The outboard middle lateral grooves are inclined with respect to a tire circumferential direction at angles smaller than those of the lateral grooves.

公开(公告)号：US10967683B2

公开(公告)日：2021-04-06

申请号：US15711611

申请日：2017-09-21

Applicant: Sumitomo Rubber Industries, Ltd.

Inventor： Tomoyuki Kujime ,  Hiroshi Okagawa

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

Abstract: The pneumatic tire comprises a tread portion 2 provided with first sipes 25 and second sipes 26 and having a first tread half portion 21 and a second tread half portion 22. The first sipes 25 are smoothly continued from a crown land region 10 in the second tread half portion 22 to a shoulder land region 13 in the first tread half portion 21 through a crown main groove 3 and a shoulder main groove 5. The second sipes 26 extend from the crown land region 10 in the second tread half portion 22 toward a second tread edge Te2.

公开(公告)号：US09889712B2

公开(公告)日：2018-02-13

申请号：US14701920

申请日：2015-05-01

Applicant: SUMITOMO RUBBER INDUSTRIES LTD.

Inventor： Naoya Nagahara ,  Junichi Nagata ,  Kiyotaka Ueyama ,  Yoshihiro Hada ,  Hiroshi Okagawa

IPC: B60C15/02 ,  B60C15/024 ,  B60C17/00 ,  B60C5/00 ,  B60C15/06

CPC classification number: B60C17/0009 ,  B60C5/00 ,  B60C15/024 ,  B60C15/0603 ,  B60C2015/0614 ,  Y10T152/10828

Abstract: A pneumatic tire includes a tread, a pair of sidewalls extending from edges of the tread substantially in a radially inward direction, a pair of clinches extending from edges of the sidewalls substantially in the radially inward direction, a pair of beads positioned on axially inner sides of the clinches, and a carcass extending along an inner side of the tread and sidewalls such that the carcass is bridging the pair of beads. Each bead includes a fitting portion extending in a circumferential direction and formed to be fitted to a rim, the fitting portion has a bottom surface positioned on a radially inner side of the fitting portion and a side surface positioned on an axially outer side of the fitting portion, the bottom surface includes a heel on the axially outer side of the fitting portion, and the side surface includes a concave extending in the circumferential direction.

公开(公告)号：US10688835B2

公开(公告)日：2020-06-23

申请号：US15298939

申请日：2016-10-20

Applicant: Sumitomo Rubber Industries, Ltd.

Inventor： Hiroshi Okagawa ,  Kosuke Nakano ,  Tomoyuki Kujime ,  Naoki Sugiyama

IPC: B60C15/04 ,  B60C15/06 ,  B60C17/04 ,  B60C17/06 ,  B60C15/00 ,  B60C17/00 ,  B60C15/05 ,  B60C15/02

Abstract: A run-flat tire comprises a tread portion, sidewall portions, bead portions, and a carcass ply extending between the bead portions. The sidewall portions are each provided therein with a sidewall reinforcing rubber layer having a crescent-shaped cross sectional shape and disposed on the axially inside of the carcass ply. The sidewall portions are each provided in the axially outer surface thereof with a rim protector which projects radially outward most on the radially outside of the radially inner edge of the sidewall reinforcing rubber layer. The bead portions are each provided therein with an axially inside core and an axially outside core between which each radially inner edge portion of the carcass ply is secured. When measured along a normal line drawn normally to the carcass ply from an apex of the rim protector, the thickness of the sidewall reinforcing rubber layer is in a range of from 29% to 35% of the thickness of the tire.

公开(公告)号：US10682890B2

公开(公告)日：2020-06-16

申请号：US15714394

申请日：2017-09-25

Applicant: Sumitomo Rubber Industries, Ltd.

Inventor： Hiroshi Okagawa ,  Tomoyuki Kujime ,  Minoru Nishi

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

Abstract: A vehicle tire includes a tread portion provided in the tread surface with a circumferentially continuously extending groove having a bottom and a pair of opposite side walls, wherein at least one of the side walls is provided with protrusions protruding into the groove and arranged in the tire circumferential direction. The protrusion has a gradually increasing part in which the area of the cross section of the protrusion being parallel with the tread surface is gradually increased toward the radially outer side of the tire.