Tire
AssigneeSumitomo Rubber Industries, Ltd.
InventorHiroshi Yamaoka
Life of this patent
Estimating the term…
Abstract
A tire comprises a tread portion 2. The tread portion 2 comprises a first main groove 11 and a second main groove 12 extending continuously in a tire circumferential direction, and a land region 21 defined between the first main groove 11 and the second main groove 12. The land region 21 is provided with a plurality of lateral grooves 15. Each of the lateral grooves 15 comprises a first lug groove portion 16 extending obliquely with respect to a tire axial direction from the first main groove 11, a second lug groove portion 17 extending obliquely in a same direction as the first lug groove portion 16 from the second main groove 12, and a sipe portion 18 extending obliquely in an opposite direction to the first lug groove portion 16 so as to connect between the first lug groove portion 16 and the second lug groove portion 17.
Claims14
A tire comprising:
- a tread portion comprising
- a first main groove and a second main groove extending continuously in a tire circumferential direction, and
- a land region defined between the first main groove and the second main groove, the land region being provided with a plurality of lateral grooves, wherein
- each of the lateral grooves comprises
- a first lug groove portion extending obliquely with respect to a tire axial direction from the first main groove,
- a second lug groove portion extending obliquely in a same direction as the first lug groove portion from the second main groove, and
- a sipe portion extending obliquely in an opposite direction to the first lug groove portion so as to connect between the first lug groove portion and the second lug groove portion, wherein
- the first lug groove portion has a maximum depth different from that of the second lug groove portion,
- the land region includes a plurality of blocks divided by the lateral grooves,
- the blocks include at least one block provided with a crossing sipe,
- the crossing sipe comprises
- a first outer portion extending obliquely in the same direction as the first lug groove portion from the first main groove,
- a second outer portion extending obliquely in the same direction as the first lug groove portion from the second main groove, and
- a center portion extending obliquely in the opposite direction to the first lug groove portion so as to connect between the first outer portion and the second outer portion,
- the at least one block is provided with
- a first lug sipe extending obliquely in a same direction as the first outer portion from the first main groove and terminating within the at least one block, and
- a second lug sipe extending obliquely in a same direction as the second outer portion from the second main groove and terminating within the at least one block,
- the at least one block is divided by the crossing sipe into a first block piece and a second block piece,
- the first lug sipe is arranged in the first block piece,
- the second lug sipe is arranged in the second block piece,
- the first lug sipe intersects with an extended area obtained by extending the second lug groove portion along a longitudinal direction thereof of one of the lateral grooves adjacent to the first block piece, and
- the second lug sipe intersects with an extended area obtained by extending the first lug groove portion along a longitudinal direction thereof of one of the lateral grooves adjacent to the second block piece.
Dependencies are inferred from the claim text.