Tyre
AssigneeSumitomo Rubber Industries, Ltd.
InventorMasahiro Hikita
Life of this patent
Estimating the term…
Abstract
To improve uneven wear resistance performance while maintaining drainage performance. A tyre is provided with a plurality of inclined grooves in a tread portion. Each of the inclined grooves extends from a crown region to a shoulder region. Each of the inclined grooves includes a first portion arranged on the crown region side, a second portion arranged on the shoulder region side, and a third portion connecting between the first portion and the second portion. The third portion has a groove width smaller than the first portion and the second portion. The first portion, the second portion, and the third portion are inclined to the same side with respect to the tyre circumferential direction.
Claims20
A tyre comprising a tread portion, wherein
- the tread portion is provided with a plurality of inclined grooves inclined with respect to a tyre circumferential direction,
- each of the inclined grooves extends from a crown region to a shoulder region,
- each of the inclined grooves consists of a first portion arranged on the crown region side, a second portion arranged on the shoulder region side, and a third portion connecting the first portion and the second portion,
- the first portion has a groove width gradually decreasing from a lengthwise center thereof to both ends thereof,
- the second portion has a groove width gradually decreasing from a lengthwise center thereof to both ends thereof,
- the third portion extends linearly over an entire length thereof at a constant groove width,
- the constant groove width of the third portion is smaller than the groove width of the whole first portion except both ends thereof and the whole second portion except both ends thereof,
- the first portion, the second portion, and the third portion are inclined to the same side with respect to the tyre circumferential direction, and
- a length in a tyre axial direction of the first portion is smaller than a length in the tyre axial direction of the second portion.
A tyre comprising a tread portion, wherein
- the tread portion is provided with a plurality of inclined grooves inclined with respect to a tyre circumferential direction,
- each of the inclined grooves extends from a crown region to a shoulder region,
- each of the inclined grooves consists of a first portion arranged on the crown region side, a second portion arranged on the shoulder region side, and a third portion connecting the first portion and the second portion,
- the first portion has a groove width gradually decreasing from a lengthwise center thereof to both ends thereof,
- the second portion has a groove width gradually decreasing from a lengthwise center thereof to both ends thereof,
- the third portion extends linearly over an entire length thereof at a constant groove width,
- the constant groove width of the third portion is smaller than the groove width of the whole first portion except both ends thereof and the whole second portion except both ends thereof,
- the first portion, the second portion, and the third portion are inclined to the same side with respect to the tyre circumferential direction, and
- a length in the tyre axial direction of the second portion is 20% or more and 30% or less of a tread width.
Dependencies are inferred from the claim text.