Tire
AssigneeSumitomo Rubber Industries, Ltd.
InventorsKenichiro Matsuoka, Yoshifumi Kawagoe
Life of this patent
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Abstract
A tire comprises a tread portion comprising at least one land portion having a first longitudinal edge, a second longitudinal edge, and a ground contacting top surface therebetween. The land portion is provided with first sipes, second sipes and third sipes. Each first sipe is inclined with respect to the tire axial direction to a first direction. Each second sipe is inclined with respect to the tire axial direction to a direction opposite to the first direction. The third sipe comprises a first oblique portion extending from the first longitudinal edge and inclined to the first direction, and a second oblique portion extending from the second longitudinal edge and inclined to a direction opposite to the first direction.
Claims14
A tire comprising:
- a tread portion having a first tread edge and a second tread edge and comprising a crown land portion, a first middle land portion, a second middle land portion, a first shoulder land portion and a second shoulder land portion,
- wherein
- the crown land portion is disposed on a tire equator, having
- a first longitudinal edge extending in a tire circumferential direction,
- a second longitudinal edge extending in the tire circumferential direction, and
- a ground contacting top surface between the first longitudinal edge and the second longitudinal edge,
- wherein
- the crown land portion is provided with first sipes, second sipes and third sipes,
- each of the first sipes extends from the first longitudinal edge toward the second longitudinal edge while inclining with respect to a tire axial direction to a first direction, and having a closed end within the ground contacting top surface,
- each of the second sipes extends from the second longitudinal edge toward the first longitudinal edge while inclining with respect to the tire axial direction to the first direction, and having a closed end within the ground contacting top surface, and
- each of third sipes extends from the first longitudinal edge to the second longitudinal edge, and comprises:
- a first oblique portion extending from the first longitudinal edge toward the second longitudinal edge while inclining with respect to the tire axial direction to the first direction, and
- a second oblique portion extending from the second longitudinal edge toward the first longitudinal edge while inclining with respect to the tire axial direction to the first direction so as to have a V-shaped form oriented toward the first direction,
- wherein
- the first middle land portion is provided with transverse first middle lateral grooves, first terminating middle sipes, and second terminating middle sipes,
- the transverse first middle lateral grooves, the first terminating middle sipes and the second terminating middle sipes are inclined with respect to the tire axial direction to the first direction same as the first sipes,
- the transverse first middle lateral grooves extend across an entire width of the first middle land portion,
- the first terminating middle sipes extend from an edge of the first middle land portion on a first tread edge side and are terminated within the first middle land portion, and
- the second terminating middle sipes extend from an edge of the first middle land portion on a second tread edge side and are terminated within the first middle land portion,
- wherein
- the second middle land portion is provided with second middle lateral grooves and transverse middle sipes,
- the second middle lateral grooves and the transverse middle sipes each extend across an entire width of the second middle land portion, forming a V-shaped form oriented oppositely to those of the third sipes,
- wherein
- the first shoulder land portion is provided with first shoulder lateral grooves and first shoulder sipes, and
- the first shoulder lateral grooves and the first shoulder sipes each extend across an entire width of the first shoulder land portion, while inclining with respect to the tire axial direction to the first direction such that an inclination angle gradually increases from the first tread edge toward the axially inside of the tire, and
- wherein
- the second shoulder land portion is provided with second shoulder lateral grooves and second shoulder sipes, and
- the second shoulder lateral grooves and the second shoulder sipes each extend across an entire width of the second shoulder land portion, while inclining with respect to the tire axial direction to a second direction opposite to the first direction such that an inclination angle gradually increases from the second tread edge toward the axially inside of the tire.
Dependencies are inferred from the claim text.