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US 12,370,838 B2Granted
Pneumatic tire
AssigneeThe Yokohama Rubber Co., Ltd.
InventorTakamasa Motomitsu
Life of this patent
Estimating the term…
Abstract
A pneumatic tire includes a pair of circumferential main grooves extending in a tire circumferential direction, and a pair of shoulder land portions and a single center land portion defined and formed by the circumferential main grooves. In addition, the center land portion includes a plurality of center narrow shallow grooves extending through the center land portion in a tire width direction. A groove depth H21 of the center narrow shallow groove is in a range 0.025≤H21/Hg≤0.150 with respect to a maximum groove depth Hg of the circumferential main groove.
Claims16
A pneumatic tire comprising:
- a pair of circumferential main grooves extending in a tire circumferential direction, and
- a pair of shoulder land portions and a single center land portion defined and formed by the circumferential main grooves,
- the center land portion comprising a plurality of center narrow shallow grooves extending through the center land portion in a tire width direction,
- a groove depth H21 of the center narrow shallow groove being in a range 0.025≤ H21/Hg≤0.150 with respect to a maximum groove depth Hg of the circumferential main groove,
- the center land portion comprising a plurality of center narrow shallow grooves extending through the center land portion in a tire width direction and connected to the pair of circumferential main grooves, and
- the center narrow shallow groove having a groove width W21 of 2.5 mm or more and the groove depth H21 of 5.0 mm or less;
- wherein
- the center land portion comprises center bent grooves having a bent shape or a curved shape and being open to the circumferential main groove at at least one end portion,
- a groove depth H22 of the center bent grooves is in a range 0.50≤H22/Hg≤0.90 with respect to the maximum groove depth Hg of the circumferential main groove,
- the center bent grooves have a linear shape, an arc shape, or an S shape, and
- an extension length L22 of the center bent grooves in the tire width direction is in a range 0.45≤L22/Wb2≤0.65 with respect to a ground contact width Wb2 of the center land portion.
8 more elements
A pneumatic tire comprising:
- a pair of circumferential main grooves extending in a tire circumferential direction, and
- a pair of shoulder land portions and a single center land portion defined and formed by the circumferential main grooves,
- the center land portion comprising a plurality of center narrow shallow grooves extending through the center land portion in a tire width direction,
- a groove depth H21 of the center narrow shallow groove being in a range 0.025≤H21/Hg≤0.150 with respect to a maximum groove depth Hg of the circumferential main groove,
- the center land portion comprising a plurality of center narrow shallow grooves extending through the center land portion in a tire width direction and connected to the pair of circumferential main grooves, and
- the pneumatic tire being a construction vehicle tire;
- wherein
- the center land portion comprises center bent grooves having a bent shape or a curved shape and being open to the circumferential main groove at at least one end portion,
- a groove depth H22 of the center bent grooves is in a range 0.50≤H22/Hg≤0.90 with respect to the maximum groove depth Hg of the circumferential main groove,
- the center bent grooves have a linear shape, an arc shape, or an S shape, and
- an extension length L22 of the center bent grooves in the tire width direction is in a range 0.45≤L22/Wb2≤0.65 with respect to a ground contact width Wb2 of the center land portion.
8 more elements
A pneumatic tire comprising:
- a pair of circumferential main grooves extending in a tire circumferential direction, and
- a pair of shoulder land portions and a single center land portion defined and formed by the circumferential main grooves,
- the center land portion comprising a plurality of center narrow shallow grooves extending through the center land portion in a tire width direction,
- a groove depth H21 of the center narrow shallow groove being in a range 0.025≤H21/Hg≤0.150 with respect to a maximum groove depth Hg of the circumferential main groove,
- the center land portion comprising a circumferential narrow groove extending in the tire circumferential direction, and
- a groove depth H23 of the circumferential narrow groove being in a range 0.70≤H23/Hg≤0.90 with respect to the maximum groove depth Hg of the circumferential main groove.
3 more elements
A pneumatic tire comprising:
- a pair of circumferential main grooves extending in a tire circumferential direction, and
- a pair of shoulder land portions and a single center land portion defined and formed by the circumferential main grooves,
- the center land portion comprising a plurality of center narrow shallow grooves extending through the center land portion in a tire width direction,
- a groove depth H21 of the center narrow shallow groove being in a range 0.025≤H21/Hg≤0.150 with respect to a maximum groove depth Hg of the circumferential main groove,
- the center land portion comprising center bent grooves having a bent shape or a curved shape and being open to the circumferential main groove at at least one end portion,
- a groove depth H22 of the center bent grooves being in a range 0.50≤H22/Hg≤0.90 with respect to the maximum groove depth Hg of the circumferential main groove, and
- the center bent grooves comprising a raised bottom portion at an opening portion corresponding to the circumferential main groove.
4 more elements
A pneumatic tire comprising:
- a pair of circumferential main grooves extending in a tire circumferential direction, and
- a pair of shoulder land portions and a single center land portion defined and formed by the circumferential main grooves,
- the center land portion comprising a plurality of center narrow shallow grooves extending through the center land portion in a tire width direction,
- a groove depth H21 of the center narrow shallow groove being in a range 0.025≤H21/Hg≤0.150 with respect to a maximum groove depth Hg of the circumferential main groove,
- the center land portion comprising a circumferential narrow groove extending in the tire circumferential direction and center bent grooves having a bent shape or a curved shape and being open to the circumferential narrow groove at one end portion, and
- the center bent grooves comprising a raised bottom portion at an opening portion corresponding to the circumferential narrow groove.
3 more elements
Dependencies are inferred from the claim text.