Tire
AssigneeSumitomo Rubber Industries, Ltd.
InventorTakehiko Murata
Life of this patent
Estimating the term…
Abstract
A tire 1 comprises a tread portion 2, a tread edge Te provided in the tread portion 2, a shoulder main groove 3 extending continuously in the tire circumferential direction in the tread portion 2, and a shoulder land region 5 being defined between the tread edge Te and the shoulder main groove 3. The shoulder land region 5 is provided with a shoulder lateral groove 10 connecting between the shoulder main groove 3 and the tread edge Te and a first shoulder lug groove 11 extending axially inwardly from the tread edge Te and terminating within the shoulder land region 5. An angle θ1 of the shoulder lateral groove 10 with respect to the tire axial direction is larger by 10 to 40 degrees than an angle θ2 of the first shoulder lug groove 11 with respect to the tire axial direction.
Claims20
A tire comprising a tread portion, a tread edge provided in the tread portion, a shoulder main groove extending continuously in the tire circumferential direction in the tread portion, and a shoulder land region being defined between the tread edge and the shoulder main groove,
- wherein,
- the shoulder land region is provided with a shoulder lateral groove connecting between the shoulder main groove and the tread edge and a first shoulder lug groove extending axially inwardly from the tread edge and terminating within the shoulder land region,
- an angle of the shoulder lateral groove with respect to the tire axial direction is larger by 10 to 40 degrees than an angle of the first shoulder lug groove with respect to the tire axial direction,
- the shoulder main groove is formed as a trapezoidal wavy zigzag groove including outer groove portions, inner groove portions, first connecting portions, and second connecting portions,
- the outer groove portions extend straight in the tire circumferential direction,
- the inner groove portions extend straight in the tire circumferential direction on the axially inside of the outer groove portions,
- each of the first connecting portions extends between a respective one of the outer groove portions and one of the inner groove portions adjacent thereto in the tire circumferential direction so as to be inclined to one side with respect to the tire axial direction,
- each of the second connecting portions extends between a respective one of the outer groove portions and one of the inner groove portions adjacent thereto in the tire circumferential direction so as to be inclined in an opposite direction to the first connecting portions,
- one of groove edges of the shoulder lateral groove is smoothly connected with one of groove edges of one of the first connecting portions of the shoulder main groove,
- the shoulder land region is provided with a second shoulder lug groove extending axially outwardly from the shoulder main groove and terminating within the shoulder land region and a third shoulder lug groove extending axially inwardly from the tread edge, terminating within the shoulder land region, and having a smaller length in the tire axial direction than the first shoulder lug groove, and
- a groove width of the second shoulder lug groove is substantially the same as a groove width of the third shoulder lug groove, and
- the second shoulder lug groove is formed as a crank-shaped bent groove including a second inner lateral groove portion, a second middle lateral groove portion, and a second outer lateral groove portion each extending straight and inclined to the same direction with respect to the tire axial direction.
A tire comprising a tread portion, a tread edge provided in the tread portion, a shoulder main groove extending continuously in the tire circumferential direction in the tread portion, and a shoulder land region being defined between the tread edge and the shoulder main groove,
- wherein,
- the shoulder land region is provided with a shoulder lateral groove connecting between the shoulder main groove and the tread edge and a first shoulder lug groove extending axially inwardly from the tread edge and terminating within the shoulder land region,
- an angle of the shoulder lateral groove with respect to the tire axial direction is larger by 10 to 40 degrees than an angle of the first shoulder lug groove with respect to the tire axial direction,
- the shoulder main groove is formed as a trapezoidal wavy zigzag groove including outer groove portions, inner groove portions, first connecting portions, and second connecting portions,
- the outer groove portions extend straight in the tire circumferential direction,
- the inner groove portions extend straight in the tire circumferential direction on the axially inside of the outer groove portions,
- each of the first connecting portions extends between a respective one of the outer groove portions and one of the inner groove portions adjacent thereto in the tire circumferential direction so as to be inclined to one side with respect to the tire axial direction,
- each of the second connecting portions extends between a respective one of the outer groove portions and one of the inner groove portions adjacent thereto in the tire circumferential direction so as to be inclined in an opposite direction to the first connecting portions,
- one of groove edges of the shoulder lateral groove is smoothly connected with one of groove edges of one of the first connecting portions of the shoulder main groove,
- the shoulder land region is provided with a second shoulder lug groove extending axially outwardly from the shoulder main groove and terminating within the shoulder land region and a third shoulder lug groove extending axially inwardly from the tread edge, terminating within the shoulder land region, and having a smaller length in the tire axial direction than the first shoulder lug groove, and
- a groove width of the second shoulder lug groove is substantially the same as a groove width of the third shoulder lug groove,
- the third shoulder lug groove does not overlap the second shoulder lug groove in the tire axial direction when viewed in the tire circumferential direction, and
- a distance in the tire axial direction between an inner end in the tire axial direction of the third shoulder lug groove and an outer end in the tire axial direction of the second shoulder lug groove is in a range of from 5% to 15% of a maximum width of the shoulder land region.
Dependencies are inferred from the claim text.