# US 10,870,316 B2 · Pneumatic tire > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,870,316 B2 - Document ID: US10870316B2 - Status: Granted - Kind: B2 - Application number: 15/605,477 - Filed: 2017-05-25 - Published: 2017-09-14 - Granted: 2020-12-22 - Earliest claimed: 2013-03-19 - Assignees: Sumitomo Rubber Industries, Ltd. - Applicants: Sumitomo Rubber Industries, Ltd. - Inventors: Tadao Matsumoto - Web page: https://patentgrep.com/patent/US10870316B2 ## CPC - B60C 13/001: {Decorating, marking or the like} - B60C 13/02: Arrangement of grooves or ribs - B60C: VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES ## Abstract A pneumatic tire with a pair of sidewall portions, which comprises at least one of said sidewall portions with a radially outer region being radially outside than a tire maximum width position of its outer surface, the radially outer region being provided with a serration pattern, the serration pattern comprising a first serration group and a second serration group, the first serration group comprising a plurality of concentrically arranged first arc-shaped ridges at regular intervals around a first center point O1, the second serration group comprising a plurality of concentrically arranged second arc-shaped ridges at regular intervals around a second center point O2 that is located radially outside than the first center point O1 of the first serration group, and the first serration group and second serration group arranged in a circumferential direction of the tire so as to overlap partially. ## Claims ### Claim 1 A pneumatic tire comprising: a pair of sidewall portions, at least one of said sidewall portions having a radially outer region being radially outside than a tire maximum width position of its outer surface, the radially outer region being provided with a circumferentially extending radially inner periphery edge, a circumferentially extending radially outer periphery edge, and a serration pattern formed between the radially inner periphery edge and the radially outer periphery edge, said serration pattern comprising a plurality of serration pairs each of which comprises a first serration group and a second serration group arranged in a circumferential direction of the tire so as to overlap partially with each other, said first serration group comprising a plurality of concentrically arranged first arc-shaped ridges at regular intervals around a first center point O1, wherein the first center point O1 is provided within 10 mm from the radially inner peripheral edge, said second serration group comprising a plurality of concentrically arranged second arc-shaped ridges at regular intervals around a second center point O2 that is located radially outside than the first center point O1 of said first serration group, wherein the second center point O2 is provided within 10 mm from the radially outer peripheral edge, and in circumferentially adjacent serration pairs, an outermost first arc-shaped ridge of said first serration group of one of the adjacent serration pairs and an outermost second arc-shaped ridge of said second serration group of the other one of the adjacent serration pairs circumscribe each other, wherein the plurality of concentrically arranged first arc-shaped ridges terminate at the radially inner periphery edge, and the plurality of concentrically arranged second arc-shaped ridges terminate at the radially outer periphery edge. ### Claim 2 (depends on 1) The tire according to claim 1, wherein said first arc-shaped ridges and said second arc-shaped ridges have the same cross sections. ### Claim 3 (depends on 2) The tire according to claim 2, wherein said first arc-shaped ridges and said second arc-shaped ridges have the same intervals. ### Claim 4 (depends on 1) The tire according to claim 1, wherein said first serration group comprises a radially innermost first arc-shaped ridge having a radius of curvature in a range of from 0.5 to 10.0 mm, and said second serration group comprises a radially innermost second arc-shaped ridge having a radius of curvature in a range of from 0.5 to 10.0 mm. ### Claim 5 (depends on 4) The tire according to claim 4, wherein said first arc-shaped ridges and said second arc-shaped ridges have intervals P in a range of from 1.0 to 2.0 mm, said first arc-shaped ridges and said second arc-shaped ridges have cross sectional widths W in a range of from 0.1 to 0.6 mm, said first arc-shaped ridges and said second arc-shaped ridges have cross sectional heights H in a range of from 0.2 to 0.6 mm, and a circumferential length L between the first center point O1 and the second center point O2 is in a range of from 20 to 60 mm. ### Claim 6 (depends on 1) The tire according to claim 1, wherein said first arc-shaped ridges protrude radially outwardly of the tire with respect to the radially inner periphery edge, and said second arc-shaped ridges protrude radially inwardly of the tire with respect to the radially outer periphery edge. ### Claim 7 (depends on 1) The tire according to claim 1, wherein the first center point O1 is located radially inwardly of the radially inner peripheral edge, and the second center point O2 is located radially outwardly of the radially outer peripheral edge. ### Claim 8 (depends on 1) The tire according to claim 1, wherein a radial distance (TW) between the radially inner periphery edge and the radially outer periphery edge is smaller than a radius of curvature of the outermost first arc-shaped ridge of said each first serration group and a radius of curvature of the outermost second arc-shaped ridge of said each second serration group. ### Claim 9 (depends on 1) The tire according to claim 1, wherein in circumferentially adjacent serration pairs, the outermost first arc-shaped ridge of said first serration group of one of the adjacent serration pairs is not in contact with the outermost first arc-shaped ridge of said first serration group of the other one of the adjacent serration pairs. ### Claim 10 (depends on 1) The tire according to claim 1, wherein if the distance between the first center point O1 and the radially inner periphery edge is La, R1i is the radius of curvature of the innermost first arc-shaped ridge of the first serration group, and P is the interval between adjacent first arc-shaped ridges, then the entire first serration group satisfies the following relationship: 0.5≤(R1i−La)/P≤1.5. ### Claim 11 (depends on 10) The tire according to claim 10, wherein if the distance between the second center point O2 and the radially inner periphery edge is Lb, R2i is the radius of curvature of the innermost second arc-shaped ridge of the second serration group, and P is the interval between adjacent second arc-shaped ridges, then the entire first serration group satisfies the following relationship: 0.5≤(R2i−Lb)/P≤1.5. ### Claim 12 (depends on 1) The tire according to claim 1, wherein if the distance between the second center point O2 and the radially inner periphery edge is Lb, R2i is the radius of curvature of the innermost second arc-shaped ridge of the second serration group, and P is the interval between adjacent second arc-shaped ridges, then the entire first serration group satisfies the following relationship: 0.5≤(R2i−Lb)/P≤1.5. ### Claim 13 A pneumatic tire comprising: a pair of sidewall portions, at least one of said sidewall portions having a radially outer region being radially outside than a tire maximum width position of its outer surface, the radially outer region being provided with a circumferentially extending radially inner periphery edge, a circumferentially extending radially outer periphery edge, and a serration pattern formed between the radially inner periphery edge and the radially outer periphery edge, said serration pattern comprising a plurality of serration pairs each of which comprises a first serration group and a second serration group arranged in a circumferential direction of the tire so as to overlap partially with each other, said first serration group comprising a plurality of concentrically arranged first arc-shaped ridges at regular intervals around a first center point O1, wherein the first center point O1 is provided within 10 mm from the radially inner peripheral edge, said second serration group comprising a plurality of concentrically arranged second arc-shaped ridges at regular intervals around a second center point O2 that is located radially outside than the first center point O1 of said first serration group, wherein the second center point O2 is provided within 10 mm from the radially outer peripheral edge, and in circumferentially adjacent serration pairs, an outermost first arc-shaped ridge of said first serration group of one of the adjacent serration pairs and an outermost second arc-shaped ridge of said second serration group of the other one of the adjacent serration pairs circumscribe each other, wherein in circumferentially adjacent serration pairs, the outermost first arc-shaped ridge of said first serration group of one of the adjacent serration pairs is not in contact with the outermost first arc-shaped ridge of said first serration group of the other one of the adjacent serration pairs, and wherein in circumferentially adjacent serration pairs, the outermost second arc-shaped ridge of said second serration group of one of the adjacent serration pairs is not in contact with the outermost second arc-shaped ridge of said second serration group of the other one of the adjacent serration pairs.