Tyre for winter
AssigneeSumitomo Rubber Industries, Ltd.
InventorTatsuya Furukawa
Life of this patent
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Abstract
A tyre for winter comprises a tread portion 2 having a first tread edge (Te1) and a second tread edge (Te2) and sipes 40 provided in at least a part of the tread portion 2. The tread portion 2 is provided with a plurality of first oblique grooves (10A) each extending obliquely from the first tread edge (Te1) toward the second tread edge (Te2). Each of the first oblique grooves (10A) has an inner end (10a) terminating between a tyre equator (C) and the second tread edge (Te2). The inner end (10a) is not connected with other grooves.
Claims19
A tyre for winter comprising a tread portion having a first tread edge and a second tread edge and sipes provided in at least a part of the tread portion, wherein
- the tread portion is provided with a plurality of first oblique grooves each extending obliquely from the first tread edge toward the second tread edge,
- each of the first oblique grooves has an inner end terminating between a tyre equator and the second tread edge,
- the inner end is not connected with other grooves,
- each of the first oblique grooves has a main body portion and a widened portion connected with the main body portion on a side of the second tread edge,
- a groove width of the main body portion gradually decreases from the first tread edge toward the second tread edge,
- a groove width of the widened portion is partially enlarged,
- the tread portion has a directional pattern bound with an intended tyre rotational direction,
- each of the first oblique grooves has a groove center line inclined over an entire length thereof to a heel side in the tyre rotational direction with respect to a tyre axial direction,
- a maximum groove width of the widened portion is smaller than a maximum groove width of the main body portion, and
- the maximum groove width of the widened portion is in a range of from 0.40 to 0.60 times the maximum groove width of the main body portion.
A tyre for winter comprising a tread portion having a first tread edge and a second tread edge and sipes provided in at least a part of the tread portion, wherein
- the tread portion is provided with a plurality of first oblique grooves each extending obliquely from the first tread edge toward the second tread edge,
- each of the first oblique grooves has an inner end terminating between a tyre equator and the second tread edge,
- the inner end is not connected with other grooves,
- each of the first oblique grooves has a main body portion and a widened portion connected with the main body portion on a side of the second tread edge,
- a groove width of the main body portion gradually decreases from the first tread edge toward the second tread edge,
- a groove width of the widened portion is partially enlarged,
- the tread portion has a directional pattern bound with an intended tyre rotational direction,
- each of the first oblique grooves has a groove center line inclined over an entire length thereof to a heel side in the tyre rotational direction with respect to a tyre axial direction,
- each of the widened portions has an apex at which the widened portion has a locally maximum groove width, and
- a distance in the tyre axial direction from the apex of each of the widened portions to the tyre equator is greater than a distance in the tyre axial direction from each of the inner ends to the tyre equator.
A tyre for winter comprising a tread portion having a first tread edge and a second tread edge and sipes provided in at least a part of the tread portion, wherein
- the tread portion is provided with a plurality of first oblique grooves each extending obliquely from the first tread edge toward the second tread edge,
- each of the first oblique grooves has an inner end terminating between a tyre equator and the second tread edge,
- the inner end is not connected with other grooves,
- each of the first oblique grooves has a main body portion and a widened portion connected with the main body portion on a side of the second tread edge,
- a groove width of the main body portion gradually decreases from the first tread edge toward the second tread edge,
- a groove width of the widened portion is partially enlarged,
- the tread portion includes a crown land region extending continuously over the entire circumference of the tyre without being divided by a groove having a larger groove width than that of each of the sipes,
- a distance in a tyre axial direction between the tyre equator and the inner end is in a range of from 0.05 to 0.15 times a maximum width in the tyre axial direction of the crown land region,
- the tread portion is provided with a plurality of second oblique grooves each extending obliquely from the second tread edge toward the first tread edge,
- each of the second oblique grooves has an inner end terminating between the tyre equator and the first tread edge, and
- the inner end of each of the second oblique grooves is not connected with other grooves.
Dependencies are inferred from the claim text.