Back to results
US 12,741,489 B2Granted
Tire
AssigneeThe Yokohama Rubber Co., Ltd.
InventorHiroki Endo
Life of this patent
Estimating the term…
Abstract
A tire includes a plurality of circumferential main grooves extending in a tire circumferential direction, and a pair of shoulder land portions and one or more rows of center land portions defined by the plurality of circumferential main grooves. Further, at least one of the pair of shoulder land portions includes a plurality of shoulder lug grooves and a plurality of shoulder blocks defined and formed by the plurality of shoulder lug grooves. Additionally, at least a part of the plurality of shoulder blocks includes a notch portion that connects edge portions separated from a tire ground contact edge and a buttress portion. Additionally, the notch portion has a step-shaped wall surface in a cross-sectional view in a tire meridian direction.
Claims12
A tire, comprising:
- a plurality of circumferential main grooves extending in a tire circumferential direction;
- and
- a pair of shoulder land portions and one or more rows of center land portions defined by the plurality of circumferential main grooves,
- at least one of the pair of shoulder land portions comprising a plurality of shoulder lug grooves and a plurality of shoulder blocks defined and formed by the plurality of shoulder lug grooves,
- at least a part of the plurality of shoulder blocks comprising a notch portion that connects an edge portion separated from a tire ground contact edge and a buttress portion, and
- the notch portion having a wall surface with a step shape in a cross-sectional view in a tire meridian direction, wherein
- the step shape of the notch portion is formed by alternately connecting two or more road contact surfaces and two or more trailing surfaces in a range of 70 degrees or more and 110 degrees or less,
- the shoulder blocks each comprise a shoulder narrow groove that terminates inside the shoulder blocks at one end and opens to the tire ground contact edge at an other end, and a pair of branch portions defined and formed by the shoulder narrow groove,
- at least one of the pair of branch portions comprises the notch portion that connects the edge portion separated from the tire ground contact edge and the buttress portion,
- the notch portion extends beyond the tire ground contact edge in a tire width direction, a radially outermost road contact surface among the two or more road contact surfaces of the step shape of the notch portion is defined as a first road contact surface, and at least a portion of the first road contact surface is located inward of the tire ground contact edge in the tire width direction, and
- a maximum depth Hc of the notch portion is in a range 0.70≤Hc/H13≤1.20 with respect to a maximum depth H13 of the shoulder narrow groove, and the maximum depth H13 of the shoulder narrow groove is in a range 0.45≤H13/H11≤0.95 with respect to a groove depth H11 of the shoulder lug groove.
8 more elements
A tire, comprising:
- a plurality of circumferential main grooves extending in a tire circumferential direction;
- and
- a pair of shoulder land portions and one or more rows of center land portions defined by the plurality of circumferential main grooves,
- at least one of the pair of shoulder land portions comprising a plurality of shoulder lug grooves and a plurality of shoulder blocks defined and formed by the plurality of shoulder lug grooves,
- at least a part of the plurality of shoulder blocks comprising a notch portion that connects an edge portion separated from a tire ground contact edge and a buttress portion, and
- the notch portion having a wall surface with a step shape in a cross-sectional view in a tire meridian direction, wherein
- the step shape of the notch portion is formed by alternately connecting two or more road contact surfaces and two or more trailing surfaces in a range of 70 degrees or more and 110 degrees or less,
- the shoulder blocks each comprise a shoulder narrow groove that terminates inside the shoulder blocks at one end and opens to the tire ground contact edge at an other end, and a pair of branch portions defined and formed by the shoulder narrow groove,
- at least one of the pair of branch portions comprises the notch portion,
- a road contact surface on an outermost side in a radial direction of the two or more road contact surfaces having the step shape is defined as a first road contact surface, and
- a width Wc′ of the first road contact surface is in a range 0.55≤Wc′/D2≤0.70 with respect to a distance D2 from the tire ground contact edge to the edge portion.
8 more elements
Dependencies are inferred from the claim text.