US 12,330,452 B2
Tire
Naohiro Hayashi, Tokyo (JP)
Assigned to BRIDGESTONE CORPORATION, Tokyo (JP)
Appl. No. 18/714,198
Filed by BRIDGESTONE CORPORATION, Tokyo (JP)
PCT Filed Sep. 20, 2022, PCT No. PCT/JP2022/035032
§ 371(c)(1), (2) Date May 29, 2024,
PCT Pub. No. WO2023/112415, PCT Pub. Date Jun. 22, 2023.
Claims priority of application No. 2021-202052 (JP), filed on Dec. 13, 2021.
Prior Publication US 2025/0026153 A1, Jan. 23, 2025
Int. Cl. B60C 11/12 (2006.01); B60C 11/03 (2006.01)
CPC B60C 11/1281 (2013.01) [B60C 11/0323 (2013.01); B60C 2011/0348 (2013.01); B60C 2200/065 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A tire comprising a widthwise narrow groove extending with a tire widthwise component on a tread surface, wherein
the widthwise narrow groove has a center-side narrow groove portion located on the inner side in the tire width direction and a shoulder-side narrow groove portion connected to the outer side of the center-side narrow groove portion in the tire width direction,
in a cross-sectional view perpendicular to the extending direction of the center-side narrow groove portion, the center-side narrow groove portion is formed, from groove opening side to groove bottom side, in a shape of a continuous series of: a narrow section including the groove opening; a tapered section where the groove width increases toward the groove bottom; a wide straight section extending in the groove depth direction with a constant groove width and having a groove width greater than that of the narrow section; and an arc-shaped section including the groove bottom, and
in a cross-sectional view perpendicular to the extending direction of the shoulder-side narrow groove portion, the shoulder-side narrow groove portion is formed, from groove opening side to groove bottom side, in a shape of a continuous series of: a narrow section including the groove opening; a tapered section where the groove width increases toward the groove bottom; and an arc-shaped section including the groove bottom.