# US 9,434,212 B2 · Tire > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,434,212 B2 - Document ID: US9434212B2 - Status: Granted - Kind: B2 - Application number: 14/234,802 - Filed: 2012-07-26 - Published: 2014-06-05 - Granted: 2016-09-06 - Earliest claimed: 2011-07-26 - Assignees: Bridgestone Corporation - Applicants: Ataka Takei - Inventors: Ataka Takei - Web page: https://patentgrep.com/patent/US9434212B2 ## CPC - B60C 11/0304: {Asymmetric patterns} - B60C 11/0306: {Patterns comprising block rows or discontinuous ribs} - B60C 11/04: in which the raised area of the pattern consists only of continuous circumferential ribs, e.g. zig-zag (B60C11/12, B60C11/13 take precedence) - B60C 11/12: characterised by the use of narrow slits or incisions, e.g. sipes - B60C 11/1384: {with chamfered block corners} - B60C 2011/0344: {provided at the equatorial plane} - B60C 2011/0348: {Narrow grooves, i.e. having a width of less than 4 mm} - B60C 2011/0372: {with particular inclination angles} - B60C 2011/0381: {Blind or isolated grooves} - B60C 2011/0383: {at the centre of the tread} - B60C 2011/0388: {provided at the equatorial plane} - B60C 2011/0393: {Narrow ribs, i.e. having a rib width of less than 8 mm} - B60C 2011/1209: {straight at the tread surface} - B60C: VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES ## Abstract First inclined grooves (110) and second inclined grooves (160) are formed on a land portion (40) of a tire. The first inclined grooves (110) and second inclined grooves (160) are alternately formed in the circumferential direction of the tire. Circumferential direction sipes (200) comprise: first circumferential direction sipes (210) that are formed extending from the end at the land portion (40) side of the first inclined grooves (110) to the central portion, in the tread width direction, of the second inclined grooves (160); and second circumferential direction sipes (220) that extend from the central portion, in the tread width direction, of the second inclined grooves (160) along the extension line from the first circumferential sipes (210). The second circumferential sipes (220) terminate in the land portion (40). ## Claims ### Claim 1 A tire comprising a land portion divided by a circumferential groove extending in a tire circumferential direction and extending in the tire circumferential direction, and a circumferential siping, which is formed in the land portion, extending in the tire circumferential direction, wherein the land portion is formed with: a first inclined groove that extends from one lateral portion in a tread widthwise direction of the land portion and that is inclined relative to the tire circumferential direction; and a second inclined groove that extends from the other lateral portion in the tread widthwise direction of the land portion and that is inclined relative to the tire circumferential direction, the first inclined groove and the second inclined groove are alternately formed in the tire circumferential direction, the circumferential siping includes: a first circumferential siping that is formed from an end at a land portion side of the first inclined groove to an intermediate portion in the tread widthwise direction of the second inclined groove; and a second circumferential siping that extends from an intermediate portion in the tread widthwise direction of the second inclined groove along on an extended line of the first circumferential siping, and the second circumferential siping is terminated within the land portion. ### Claim 2 (depends on 1) The tire according to claim 1, wherein at least one of an inclined angle of the first inclined groove relative to the tire circumferential direction and an inclined angle of the second inclined groove relative to the tire circumferential direction is in a range of 20 degrees or more and 60 degrees or less. ### Claim 3 (depends on 1) The tire according to claim 1, wherein the circumferential siping includes a third circumferential siping that is formed from an end at a rib-like land portion side of the second inclined groove to an intermediate portion in the tread widthwise direction of the first inclined groove. ### Claim 4 (depends on 1) The tire according to claim 1, wherein the circumferential siping is liner. ### Claim 5 (depends on 1) The tire according to claim 1, further comprising: a center land portion formed inside relative to the land portion in the tread widthwise direction, wherein the center land portion is arranged at a location including a tire equator line, a widthwise siping that extends in the tread widthwise direction is formed in the center land portion, the widthwise siping includes: a first widthwise siping that extends from one lateral portion in the tread widthwise direction of the center land portion and that is terminated within the center land portion; and a second widthwise siping that extends from the other lateral portion in the tread widthwise direction of the center land portion and that is terminated within the center land portion, and the first widthwise siping and the second widthwise siping are terminated outside in the tread widthwise direction from the tire equator line. ### Claim 6 (depends on 5) The tire according to claim 5, wherein the second widthwise siping extends along on an extended line of the first widthwise siping.