Pneumatic tire
AssigneeSumitomo Rubber Industries, Ltd.
InventorHiroshi KAWABATA
Life of this patent
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Abstract
A pneumatic tire is provided in the tread portion 2 with a belt 7 comprising a radially outermost first belt ply 7A and a radially inner second belt ply 7B each composed of belt cords 7C, and a band 8 thereon comprising a band ply 8A compound of a band cord 8C. At least one of axially outer edge portions of the belt 7 is provided between the first belt ply 7A and the second belt ply 7B with a first reinforcing rubber layer 11 having a radially outer surface which is convexed radially outwardly and along which an axially outer edge portion 15 of the first belt ply 7A extends in a mountain shape so as to have an axially inner portion 15a extending axially outwardly and obliquely toward the band ply 8A and an axially outer portion 15b extending axially outwardly and obliquely away from the band ply 8A.
Claims20
A pneumatic tire comprising:
- a tread portion,
- a pair of bead portions each with a bead core therein,
- a pair of sidewall portions extending therebetween,
- a carcass extending between the bead portions through the tread portion and the sidewall portions,
- a belt comprising at least two belt plies disposed radially outside the carcass in the tread portion and each composed of a plurality of belt cords inclined at an angle with respect to the tire circumferential direction, and
- a band comprising a band ply disposed radially outside at least one of axially outer edge portions of the belt and composed of at least one band cord whose angle with respect to the tire circumferential direction is smaller than the angle of each of said at least two belt plies, wherein
- said at least two belt plies include a radially outermost first belt ply and a radially inner second belt ply,
- said at least one of axially outer edge portions of the belt is provided between the first belt ply and the second belt ply with a first reinforcing rubber layer having a radially outer surface being convexed radially outwardly,
- in said at least one of axially outer edge portions of the belt, the first belt ply extends along the radially outer surface of the first reinforcing rubber layer so as to have an axially inner portion extending axially outwardly and obliquely toward the band ply and an axially outer portion extending axially outwardly and obliquely away from the band ply, and
- the axially inner portion and the axially outer portion have a mountain-shape in a transverse section of the pneumatic tire including the tire rotational axis.
Dependencies are inferred from the claim text.