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US 12,673,519 B2Granted
Tire
AssigneeSumitomo Rubber Industries, Ltd.
InventorKen Miyazawa
Life of this patent
Estimating the term…
Abstract
A tire includes a tread portion having a first land region provided with first axial grooves and a second land region provided with second axial grooves. The first axial grooves are arranged at intervals in a first arrangement over the entire tire circumference. In the first arrangement, in a pair of adjacent first axial grooves, a first end of one first axial groove is located at the same position in the tire circumferential direction as the second end of the other first axial groove. The second axial grooves are arranged at intervals in a second arrangement. The number of types of a second pitch of the second axial grooves in the second arrangement is greater than the number of types of a first pitch of the first axial grooves in the first arrangement.
Claims19
A tire having a tread portion,
- wherein the tread portion comprises:
- a plurality of circumferential grooves extending continuously in a tire circumferential direction;
- and
- a plurality of land regions demarcated by the circumferential grooves, wherein
- the land regions include a first land region and a second land region adjacent to each other,
- the first land region is provided with a plurality of first axial grooves extending in a tire axial direction so as to completely cross a ground contacting surface of the first land region,
- the second land region is provided with a plurality of second axial grooves extending in the tire axial direction so as to completely cross a ground contacting surface of the second land region,
- each of the first axial grooves includes a first end on one side in the tire axial direction and a second end on the other side in the tire axial direction,
- the first axial grooves are arranged in a first arrangement over the entire circumference of the tire,
- in the first arrangement,
- the first axial grooves are arranged at intervals so that the number (a) of types of a first pitch, which is a distance in the tire circumferential direction between the first axial grooves adjacent to each other in the tire circumferential direction, is one or more over the entire circumference of the tire,
- in a pair of the first axial grooves adjacent to each other in the tire circumferential direction, a circumferential distance between the first end of one of the first axial grooves and the second end of the other first axial groove is 5% or less of the first pitch of the pair of the first axial grooves or a region obtained by extending parallel to the tire axial direction an opening at the first end of one of the first axial grooves that is open to one of the circumferential grooves adjacent to the first land region on the one side overlaps with an opening at the second end of the other first axial groove that is open to one of the circumferential grooves adjacent to the first land region on the other side,
- the second axial grooves are arranged in a second arrangement over the entire circumference of the tire,
- in the second arrangement,
- the second axial grooves are arranged at intervals so that the number (b) of types of a second pitch, which is a distance in the tire circumferential direction between the second axial grooves adjacent to each other in the tire circumferential direction, is two or more over the entire circumference of the tire, and
- the number (b) of types of the second pitch is greater than the number (a) of types of the first pitch, and
- wherein the first pitch is in the range from 80% to 120% of a width in the tire axial direction of the ground contacting surface of the first land region.
14 more elements
A tire having a tread portion,
- wherein the tread portion comprises:
- a plurality of circumferential grooves extending continuously in a tire circumferential direction;
- and
- a plurality of land regions demarcated by the circumferential grooves, wherein
- the land regions include a first land region and a second land region adjacent to each other,
- the first land region is provided with a plurality of first axial grooves extending in a tire axial direction so as to completely cross a ground contacting surface of the first land region,
- the second land region is provided with a plurality of second axial grooves extending in the tire axial direction so as to completely cross a ground contacting surface of the second land region,
- each of the first axial grooves includes a first end on one side in the tire axial direction and a second end on the other side in the tire axial direction,
- the first axial grooves are arranged in a first arrangement over the entire circumference of the tire,
- in the first arrangement,
- the first axial grooves are arranged at intervals so that the number (a) of types of a first pitch, which is a distance in the tire circumferential direction between the first axial grooves adjacent to each other in the tire circumferential direction, is one or more over the entire circumference of the tire,
- in a pair of the first axial grooves adjacent to each other in the tire circumferential direction, a circumferential distance between the first end of one of the first axial grooves and the second end of the other first axial groove is 5% or less of the first pitch of the pair of the first axial grooves or a region obtained by extending parallel to the tire axial direction an opening at the first end of one of the first axial grooves that is open to one of the circumferential grooves adjacent to the first land region on the one side overlaps with an opening at the second end of the other first axial groove that is open to one of the circumferential grooves adjacent to the first land region on the other side,
- the second axial grooves are arranged in a second arrangement over the entire circumference of the tire,
- in the second arrangement,
- the second axial grooves are arranged at intervals so that the number (b) of types of a second pitch, which is a distance in the tire circumferential direction between the second axial grooves adjacent to each other in the tire circumferential direction, is two or more over the entire circumference of the tire, and
- the number (b) of types of the second pitch is greater than the number (a) of types of the first pitch,
- wherein a maximum value of the second pitch is greater than a maximum value of the first pitch, and
- wherein the maximum value of the first pitch is in the range from 105% to 120% of an axial width of the ground contacting surface of the first land region.
15 more elements
Dependencies are inferred from the claim text.