US 12,128,713 B2
Pneumatic tire
Yoshiki Sato, Itami (JP)
Assigned to TOYO TIRE CORPORATION, Itami (JP)
Filed by TOYO TIRE CORPORATION, Itami (JP)
Filed on Sep. 23, 2022, as Appl. No. 17/951,662.
Claims priority of application No. 2021-170514 (JP), filed on Oct. 18, 2021.
Prior Publication US 2023/0120001 A1, Apr. 20, 2023
Int. Cl. B60C 11/13 (2006.01); B60C 11/11 (2006.01); B60C 11/12 (2006.01); B60C 11/03 (2006.01)
CPC B60C 11/1392 (2013.01) [B60C 11/11 (2013.01); B60C 11/1236 (2013.01); B60C 2011/0346 (2013.01); B60C 2200/14 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A pneumatic tire comprising:
a pair of main grooves which extend along a tire circumferential direction on both sides of a tire equator line of a tread, and section the tread into a three lines of lands;
a plurality of lateral grooves which extend along a tire axial direction separately from one another in the tire circumferential direction and couple the pair of main grooves to each other; and
a plurality of longitudinal grooves which extend along the tire circumferential direction between the pair of main grooves and couple the plurality of adjacent lateral grooves to each other, wherein
a center land among the three lines of lands, the center land being located between the pair of main grooves, repeats, in the tire circumferential direction, four center blocks sectioned by the lateral grooves and the longitudinal grooves,
each of the four center blocks includes a recessed portion that is open to the main groove, the lateral groove or the longitudinal groove and has one end closed,
when the recessed portions provided in the four center blocks are defined as first to fourth recessed portions, the first recessed portion and the second recessed portion extend in a direction inclined to one direction with respect to the tire equator line, and the third recessed portion and the fourth recessed portion extend in a direction inclined to another direction with respect to the tire equator line,
the first recessed portion is open in an opposite direction of a direction of the second recessed portion, and the third recessed portion is open in an opposite direction of a direction of the fourth recessed portion,
a groove width of each of the first to fourth recessed portions is 5.0 mm or more,
the four center blocks are respectively first through fourth center blocks, the first center block being point-symmetric to the second center block with respect to an arbitrary point on the tire equator line, and the third center block being point-symmetric to the fourth center block with respect to an arbitrary point on the tire equator line,
the first center block and the second center block are directly adjacent to each other in the tire axial direction, and
the third center block and the fourth center blocks are directly adjacent to each other in the tire axial direction.