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US 11,845,302 B2Granted
Tire
AssigneeSumitomo Rubber Industries, Ltd.
InventorMahito Arai
Life of this patent
Estimating the term…
Abstract
The tire has a tread portion for which an intended tire rotational direction is specified. The tread portion comprises first inclined land portions defined between first inclined grooves. The first inclined land portion comprises an outer portion having a first wall surface and a second wall surface, and an inner portion having a third wall surface and a fourth wall surface. The angle θ1 of the first wall surface is smaller than the angle θ2 of the second wall surface, and the angle θ3 of the third wall surface is larger than the angle θ4 of the fourth wall surface.
Claims20
A tire comprising:
- a tread portion for which an intended rotational direction of the tire is specified, the tread portion having a tread surface and a first tread edge on one side in the tire axial direction, the tread portion provided with a plurality of first inclined grooves extending from the first tread edge toward the tire equator while inclining to a heel side in the intended rotational direction, and the tread portion including a plurality of first inclined land portions defined between the first inclined grooves,
- wherein
- at least one of the first inclined land portions comprising an axially outer portion on the first tread edge side and an axially inner portion on the tire equator side,
- the axially outer portion has a first wall surface defined by one of the adjacent first inclined grooves on the heel side of the outer portion, and a second wall surface defined by one of the adjacent first inclined grooves on the toe side of the outer portion, and
- the axially inner portion has a third wall surface defined by one of the adjacent first inclined grooves on the heel side of the inner portion, and a fourth wall surface defined by one of the adjacent first inclined grooves on the toe side of the inner portion,
- wherein
- the angle θ1 of the first wall surface is smaller than the angle θ2 of the second wall surface, and
- the angle θ3 of the third wall surface is larger than the angle θ4 of the fourth wall surface, each angle being with respect to a normal line to the tread surface,
- wherein
- in a region where the first wall surface is formed, the adjacent first inclined groove has a groove width W1 and a depth D1, and the angle θ1 of the first wall surface satisfies the following condition:
- 0≤(D1×tan θ1)/W1≤0.2,
- in a region where the second wall surface is formed, the adjacent first inclined groove has a groove width W2 and a depth D2, and the angle θ2 of the second wall surface satisfies the following condition:
- 0≤(D2×tan θ2)/W2≤0.2,
- in a region where the third wall surface is formed, the adjacent first inclined groove has a groove width W3 and a depth D3, and the angle θ3 of the third wall surface satisfies the following condition:
- 0≤(D3×tan θ3)/W3≤0.2, and
- in a region where the fourth wall surface is formed, the adjacent first inclined groove has a groove width W4 and a depth D4, and the angle θ4 of the fourth wall surface satisfies the following condition:
- 0≤(D4×tan θ4)/W4≤0.2.
14 more elements
Dependencies are inferred from the claim text.