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US 8,100,159 B2Granted
Pneumatic tire with circumferential main grooves having protrusions
AssigneeToyo Tire & Rubber Co., Ltd.
InventorTsuyoshi Fujioka
Life of this patent
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AssigneeToyo Tire & Rubber Co., Ltd.
InventorTsuyoshi Fujioka
Estimating the term…
In the pneumatic tire in which not less than three main grooves 1 extending in the tire circumferential direction R are formed and ribs 2 are formed by the main grooves 1, upper edges 11 of the main groove 1 when the tire is new extend in a linear manner in the tire circumferential direction R, the bottom 12 of the main groove 1 extends in a zigzag manner in the tire circumferential direction R, the sidewalls 13 of the main groove 1 is provided with concave portions and convex portions, and in the concave portion of at least one of the sidewalls 13 of the main groove 1, the protrusions 3 that is joined to the bottom 12 of the main groove 1 and to the sidewall 13. Further, the pneumatic tire may be provided with sipes or notches that extend from the concave portion to the inner side of the rib 2 in the tire width direction.
A pneumatic tire with not less than three main grooves extending in the tire circumferential direction, and ribs formed by two of the main grooves, wherein upper edges of at least one of the main grooves when the tire is new extend in a linear manner in the tire circumferential direction, the bottom of the at least one of the main grooves extends in a zigzag manner in the tire circumferential direction, the sidewalls of the at least one of the main grooves are provided with concave portions and convex portions, in the concave portions of at least one of the sidewalls of the at least one of the main grooves, protrusions that are joined to the bottom of the at least one of the main grooves and to the sidewall are provided, and the pneumatic tire is provided with notches that extend from the concave portions to the inner side of the rib in the tire width direction and the width of the notches gradually narrows from the concave portions to the inner side of the rib.
A pneumatic tire with not less than three main grooves extending in the tire circumferential direction, and ribs formed by two of the main grooves, wherein upper edges of at least one of the main grooves when the tire is new extend in a linear manner in the tire circumferential direction, the bottom of the at least one of the main grooves extends in a zigzag manner in the tire circumferential direction, the sidewalls of the at least one of the main grooves are provided with concave portions and convex portions, in the concave portions of at least one of the sidewalls of the at least one of the main grooves, protrusions that are joined to the bottom of the at least one of the main grooves and to the sidewall are provided, and the pneumatic tire is provided with sipes that extend from the concave portions to the inner side of the rib in the tire width direction and that are present in the sidewall only at the concave portions.
Dependencies are inferred from the claim text.