公开(公告)号：US20230150312A1

公开(公告)日：2023-05-18

申请号：US17970647

申请日：2022-10-21

Applicant: Sumitomo Rubber Industries, Ltd.

Inventor： Satoko TSUJIBAYASHI

IPC: B60C11/03

CPC classification number: B60C11/03 ,  B60C2011/0346 ,  B60C2011/0353 ,  B60C2011/0355

Abstract: A tire includes a tread portion being provided with circumferential grooves extending continuously in a zigzag manner. One of the circumferential grooves includes first inclined elements inclined in a first direction with respect to the tire circumferential direction, second inclined elements inclined in a second direction opposite to the first direction with respect to the tire circumferential direction, and intersections where the first inclined elements and second inclined elements intersect. Each of the first inclined elements and the second inclined elements is provided with at least one first protrusion that projects outwardly in a tire radial direction from the groove bottom and connects the pair of groove walls. At least one of the intersections is provided with a second protrusion that projects outwardly in the tire radial direction from the groove bottom and is separated from the pair of groove walls.

公开(公告)号：US20240208273A1

公开(公告)日：2024-06-27

申请号：US18393700

申请日：2023-12-22

Applicant: Sumitomo Rubber Industries, Ltd.

Inventor： Satoko TSUJIBAYASHI ,  Tetsuya KITANO

IPC: B60C15/024

CPC classification number: B60C15/0242

Abstract: A pneumatic tire can include a plurality of recesses arranged in a tire circumferential direction. Each recess can include a sidewall surface extending inward in a tire axial direction from an outer surface of a bead portion, and a bottom surface defining a depth of the recess. In a cross-section of the recess including a tire rotation axis, a sidewall surface located on an outer side in a tire radial direction and the bottom surface can be smoothly connected via an arc portion. The arc portion can have a radius of curvature equal to or larger than the depth of the recess.

公开(公告)号：US20230135384A1

公开(公告)日：2023-05-04

申请号：US17967410

申请日：2022-10-17

Applicant: Sumitomo Rubber Industries, Ltd.

Inventor： Satoko TSUJIBAYASHI

IPC: B60C11/03 ,  B60C11/12

Abstract: A heavy duty tire comprises a tread portion having circumferential grooves and land portions. The circumferential grooves include two shoulder circumferential grooves and a crown circumferential groove. The land portions include two of shoulder land portions and two crown land portions. The width W3 of the shoulder land portion is 17% to 28% of the tread width TW. The crown land portion is divided by crown shallow groove into crown blocks. The groove depth of the crown shallow groove is smaller than the groove depth of the crown circumferential groove. The groove bottom of the crown shallow groove is provided with a groove bottom sipe. The ground contacting top surface of the crown block is hexagonal, and the maximum circumferential dimension is 100% to 200% of the maximum axial dimension.

公开(公告)号：US20230311588A1

公开(公告)日：2023-10-05

申请号：US18127687

申请日：2023-03-29

Applicant: Sumitomo Rubber Industries, Ltd.

Inventor： Satoko TSUJIBAYASHI

IPC: B60C15/06 ,  B60C11/03

CPC classification number: B60C15/0628 ,  B60C11/03 ,  B60C2011/0341 ,  B60C2200/06

Abstract: A heavy duty pneumatic tire can have, in each shoulder land portion, a plurality of holes extending from an outer surface thereof toward a belt. The tire can include a fiber reinforcing layer including a relatively large number of fiber cords aligned with each other and formed from a nylon fiber. The fiber reinforcing layer can include an inner fiber reinforcing layer and an outer fiber reinforcing layer. The inner fiber reinforcing layer can cover an outer end of a steel reinforcing layer from an outer side in an axial direction, and the outer fiber reinforcing layer can cover an outer end of the inner fiber reinforcing layer from the outer side in the axial direction.

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%.