Pneumatic tire
AssigneeThe Yokohama Rubber Co., Ltd.
InventorKenichi Matsumoto
Life of this patent
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Abstract
In a tread pattern of a tire, a main groove side of a shoulder lug groove in a side of a first circumferential main groove inclines with respect to the width direction. In each of first intermediate lug grooves and inner lug grooves, a direction from one side toward the other side in the width direction is inclined to a side identical to a side to which the main groove side is inclined. The first intermediate lug grooves overlap with extension lines of each of the shoulder lug grooves extending from a closed end of each of the shoulder lug grooves along an inclination direction of the main groove side toward each of closed ends of the inner lug grooves. A second intermediate lug groove extends between two of the extension lines adjacent in the circumferential direction, in a direction along the extension lines.
Claims20
A pneumatic tire comprising a tread pattern, the tread pattern comprising at least three circumferential main grooves extending in a tire circumferential direction at intervals from each other, a plurality of shoulder lug grooves located in an outer side in a tire width direction of a first circumferential main groove located outermost in the tire width direction of the at least three circumferential main grooves, the shoulder lug grooves being provided in a region of a shoulder land portion in which a ground contact edge in the tire width direction is located, the shoulder lug grooves extending from the outer side in the tire width direction toward the first circumferential main groove and being closed without reaching the first circumferential main groove, the shoulder lug grooves being disposed at intervals in the tire circumferential direction, a plurality of first intermediate lug grooves provided in a region of an intermediate land portion between the first circumferential main groove and a second circumferential main groove of the at least three circumferential main grooves, the second circumferential main groove being located in an inner side of the first circumferential main groove in the tire width direction and located closest to the first circumferential main groove, the first intermediate lug grooves extending from the second circumferential main groove toward the first circumferential main groove and being closed without reaching the first circumferential main groove, the first intermediate lug grooves being disposed at intervals in the tire circumferential direction;
- a plurality of inner lug grooves provided in a region of an inner land portion between the second circumferential main groove and a third circumferential main groove of the at least three circumferential main grooves, the third circumferential main groove being located opposite to the first circumferential main groove with respect to the second circumferential main groove, the inner lug grooves extending from the third circumferential main groove toward the second circumferential main groove and being closed without reaching the second circumferential main groove, the inner lug grooves being disposed at intervals in the tire circumferential direction, and a plurality of second intermediate lug grooves provided in a region of the intermediate land portion and extending from the first circumferential main groove toward the second circumferential main groove and being closed without reaching the second circumferential main groove, the second intermediate lug grooves being disposed at intervals in the tire circumferential direction, a main groove side portion of each of the shoulder lug grooves including a closed end of the shoulder lug groove and located in a side of the first circumferential main groove, the main groove side portion extending at an incline with respect to the tire width direction;
- in each of the first intermediate lug grooves and each of the inner lug grooves, a direction from one side toward the other side in the tire width direction being inclined, with respect to the tire width direction, to a side identical to a side to which a direction from one side toward the other side in the tire width direction of the main groove side portion is inclined, the first intermediate lug grooves overlapping with a plurality of extension lines each formed of each of the shoulder lug grooves smoothly extending from the closed end of each of the shoulder lug grooves along an inclination direction of the main groove side portion toward each of closed ends of the inner lug grooves and contacting each of the closed ends of the inner lug grooves, the extension lines being straight lines, a smaller angle of angles formed at a closed end of each of the shoulder lug grooves between the inclination direction of the main groove side portion and an inclination direction of each of the extension lines being equal to or less than 10 degrees, and a smaller angle of angles formed at a closed end of each of the closed ends of the inner lug grooves between an inclination direction of the inner lug grooves and the inclination direction of each of the extension lines being equal to or less than 10 degrees, and the second intermediate lug grooves extending between two of the extension lines adjacent in the tire circumferential direction, in a direction along the extension lines.
Dependencies are inferred from the claim text.