Pneumatic tire
AssigneeThe Yokohama Rubber Co., Ltd.
InventorMasatoshi Kuwajima
Life of this patent
Estimating the term…
Abstract
A pneumatic tire including a closed sipe in a land portion 3 formed in a tread surface, provided with at least three cuts extending in a radiation direction from an imaginary axis that extends in a depth direction of the land portion, and that terminate in the land portion. The cuts are provided with a spiral-like twist in the depth direction, centered on the imaginary axis, and a twist angle thereof is not less than 10° and not more than 135°. Additionally, a length in the radiation direction of the cuts or a width of the cuts is formed larger at a tread surface side than at a bottom surface side.
Claims18
A pneumatic tire comprising:
- a land portion formed in a tread surface;
- and a closed sipe provided in the land portion with at least three cuts extending in a radiation direction from an imaginary axis that extends in a depth direction of the land portion, and that terminate in the land portion, wherein the cuts of the closed sipe are provided with a spiral-like twist in the depth direction, centered on the imaginary axis, wherein
- the closed sipe forms the spiral-like twist, a twist angle of the cuts from a top surface to a bottom surface of the land portion is not less than 10° and less than 120°, a width of the cuts is formed larger at a tread surface side than at a bottom surface side in a depth direction of the closed sipes, and the width of the cuts becomes smaller in a gradual or stepwise manner from the tread surface side toward the bottom surface side of the spiral-like twist of the closed sipe.
A pneumatic tire comprising:
- a land portion formed in a tread surface;
- and a closed sipe provided in the land portion with at least three cuts extending in a radiation direction from an imaginary axis that extends in a depth direction of the land portion, and that terminate in the land portion, wherein
- the cuts of the closed sipe are provided with a spiral-like twist in the depth direction, centered on the imaginary axis, wherein a twist angle of the cuts from a top surface to a bottom surface of the land portion is not less than 10° and less than 120°, and a width of the cuts is formed larger at a tread surface side than at a bottom surface side in a depth direction of the closed sipes.
Dependencies are inferred from the claim text.