Patent ID: 11912068
Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A tyre comprising a tread portion comprising:
a first tread edge and a second tread edge,
a crown groove extending continuously in a tyre circumferential direction in a crown portion of the tyre,
a first land portion defined between the first tread edge and the crown groove, and
a second land portion extending from the crown groove towards the second tread edge,
wherein
the first land portion is provided with a plurality of first lateral grooves connected to the crown groove and extending from the crown groove in a first direction to the first tread edge,
the second land portion is provided with a plurality of second lateral grooves connected to the crown groove and extending from the crown groove in a second direction to the second tread edge,
the first land portion is divided into a plurality of first blocks by the crown groove and the plurality of first lateral grooves,
the second land portion is divided into a plurality of second blocks by the crown groove and the plurality of second lateral grooves,
each of the first blocks has a first edge and a second edge located at the intersections of the crown groove and the first lateral grooves defining the respective block, and a lateral wall extending from the first edge to the second edge and forming part of a first lateral wall of the crown groove,
each of the second blocks has a first edge and a second edge located at the intersections of the crown groove and the second lateral grooves defining the respective block, and a lateral wall extending from the first edge to the second edge and forming part of a second lateral wall of the crown groove,
the first edge of the first block circumferentially faces to a same direction as the first edge of the second block,
a first angle between the first lateral wall of the crown groove and the first lateral groove at each of the first edges of the first blocks is an acute angle,
a second angle between the second lateral wall of the crown groove and the second lateral groove at each of the first edges of the second blocks is an obtuse angle,
the first edge of each of the first blocks has a first larger axial distance from the first tread edge than the second edge of the respective first block,
the first edge of each of the second blocks has a second larger axial distance from the second tread edge than the second edge of the respective second block,
the crown groove extends continuously at least substantially positioned at an axial center of the tyre,
the first lateral wall of the crown groove is inclined in a first inclined direction with respect to the tyre circumferential direction and the second lateral wall of the crown groove is inclined in a second inclined direction opposite to the first inclined direction with respect to the tyre circumferential direction,
the lateral wall of each of the first blocks forming part of the first lateral wall of the crown groove includes three segments including a first segment adjacent to the first edge, a third segment adjacent to the second edge, and a second segment extending between the first segment and the third segment,
the first segment and the third segment are inclined in the first inclined direction with respect to the tyre circumferential direction, and the second segment is inclined in the second direction opposite to the first inclined direction with respect to the tyre circumferential direction, and
the first lateral wall of the crown groove and the second lateral wall of the crown groove are continuous in the tyre circumferential direction.