Tire
AssigneeSumitomo Rubber Industries, Ltd.
InventorYoshifumi Kawagoe
Life of this patent
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Abstract
A tire has a tread portion having a second middle land region which is provided with middle lateral grooves and circumferentially divided into middle blocks. Each middle block is provided with two first middle sipes extending from a second shoulder circumferential groove, and one second middle sipe disposed between the two first middle sipes. Each first middle sipe extends in a wavy manner in its depth direction. The second middle sipe extends straight in its depth direction. The second middle sipe extends from the second shoulder circumferential groove and is terminated within the second middle land region.
Claims16
A tire comprising a tread portion having a first tread edge and a second tread edge and provided with a plurality of circumferential grooves extending continuously in the circumferential direction of the tire to axially divide the tread portion into a plurality of land regions,
- wherein
- the circumferential grooves include
- a second shoulder circumferential groove disposed closest to the second tread edge among the circumferential grooves and
- a crown circumferential groove disposed adjacent to the second shoulder circumferential groove and on a first tread edge side thereof,
- the land regions include a second middle land region between the second shoulder circumferential groove and the crown circumferential groove,
- the second middle land region is provided with a plurality of middle lateral grooves extending across the entire width of the second middle land region to circumferentially divide the second middle land region into a plurality of middle blocks,
- each of the middle blocks is provided with
- two first middle sipes each extending from the second shoulder circumferential groove, and
- one second middle sipe disposed between the two first middle sipes and extending from the second shoulder circumferential groove to terminate within the middle block,
- each of the first middle sipes extends in a wave-like manner in its depth direction, the second middle sipe extends in a straight manner in its depth direction, and
- each of the middle blocks is provided with a plurality of middle short grooves extending from the crown circumferential groove and terminated within the middle block.
A tire comprising a tread portion having a first tread edge and a second tread edge and provided with a plurality of circumferential grooves extending continuously in the circumferential direction of the tire to axially divide the tread portion into a plurality of land regions,
- wherein
- the circumferential grooves include
- a second shoulder circumferential groove disposed closest to the second tread edge among the circumferential grooves and
- a crown circumferential groove disposed adjacent to the second shoulder circumferential groove and on a first tread edge side thereof, and
- the land regions include a second middle land region between the second shoulder circumferential groove and the crown circumferential groove,
- the second middle land region is provided with a plurality of middle lateral grooves extending across the entire width of the second middle land region to circumferentially divide the second middle land region into a plurality of middle blocks,
- each of the middle blocks is provided with
- two first middle sipes each extending from the second shoulder circumferential groove, and
- one second middle sipe disposed between the two first middle sipes and extending from the second shoulder circumferential groove to terminate within the middle block,
- each of the first middle sipes extends in a wave-like manner in its depth direction,
- the second middle sipe extends in a straight manner in its depth direction, and
- said two first middle sipes have a length L8 in the tire axial direction in a range from 0.70 to 0.90 times a width W2 in the tire axial direction of the second middle land region.
A tire comprising a tread portion having a first tread edge and a second tread edge and provided with a plurality of circumferential grooves extending continuously in the circumferential direction of the tire to axially divide the tread portion into a plurality of land regions,
- wherein
- the circumferential grooves include
- a second shoulder circumferential groove disposed closest to the second tread edge among the circumferential grooves and
- a crown circumferential groove disposed adjacent to the second shoulder circumferential groove and on a first tread edge side thereof, and
- the land regions include a second middle land region between the second shoulder circumferential groove and the crown circumferential groove,
- the second middle land region is provided with a plurality of middle lateral grooves extending across the entire width of the second middle land region to circumferentially divide the second middle land region into a plurality of middle blocks,
- each of the middle blocks is provided with
- two first middle sipes each extending from the second shoulder circumferential groove, and
- one second middle sipe disposed between the two first middle sipes and extending from the second shoulder circumferential groove to terminate within the middle block,
- each of the first middle sipes extends in a wave-like manner in its depth direction,
- the second middle sipe extends in a straight manner in its depth direction,
- a length L9 in the tire axial direction of said one second middle sipe is less than a length L8 in the tire axial direction of said two first middle sipes, and
- the length L9 is in a range from 0.50 to 0.70 times a width W2 in the tire axial direction of the second middle land region.
Dependencies are inferred from the claim text.