US 12,214,623 B2
Tire
Kotaro Tahara, Kobe (JP); Yoshifumi Kawagoe, Kobe (JP); and Mari Mishima, Kobe (JP)
Assigned to SUMITOMO RUBBER INDUSTRIES, LTD., Kobe (JP)
Filed by Sumitomo Rubber Industries, Ltd., Kobe (JP)
Filed on Feb. 3, 2023, as Appl. No. 18/105,572.
Claims priority of application No. 2022-027771 (JP), filed on Feb. 25, 2022; and application No. 2022-027772 (JP), filed on Feb. 25, 2022.
Prior Publication US 2023/0271455 A1, Aug. 31, 2023
Int. Cl. B60C 11/12 (2006.01); B60C 11/03 (2006.01)
CPC B60C 11/1218 (2013.01) [B60C 11/1272 (2013.01); B60C 2011/0372 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A tire comprising:
a tread portion comprising a first tread edge, a second tread edge, and a crown land portion arranged between the first tread edge and the second tread edge, wherein
the crown land portion comprises a first longitudinal edge extending in a tire circumferential direction on a first tread edge side, a second longitudinal edge extending in the tire circumferential direction on a second tread edge side, and a ground contact surface between the first longitudinal edge and the second longitudinal edge,
the crown land portion is provided with a plurality of first crown sipes, a plurality of second crown sipes, and a plurality of third crown sipes,
the first crown sipes, the second crown sipes, and the third crown sipes open at the ground contact surface via chamfer portions,
the first crown sipes, the second crown sipes, and the third crown sipes each include a main body portion having two opposing inner walls with a width of 1.5 mm or less,
the first crown sipes and the third crown sipes extend from the first longitudinal edge and have closed ends in the ground contact surface,
the closed ends of the third sipes are not connected to any other groove or sipe,
the second crown sipes extend from the second longitudinal edge and have closed ends in the ground contact surface,
each of the first crown sipes has an opening width at the ground contact surface which is constant in a longitudinal direction of the sipe,
each of the second crown sipes has an opening width at the ground contact surface which is constant in a longitudinal direction of the sipe, and
each of the third crown sipes has an opening width which decreases continuously from the first longitudinal edge toward the closed end thereof.