Pneumatic tire
AssigneeToyo Tire Corporation
InventorKunihiko Nagai
Life of this patent
Estimating the term…
Abstract
A tire has a cap rubber formed of a nonconductive rubber and forms a ground surface, and a conductive portion provided in at least one side end portion of a pair of side end portions in both ends in a tire width direction. The conductive portion is formed of a conductive rubber, and reaches a side surface of the cap rubber from the ground surface through an inner portion of the cap rubber. The conductive portion is the smallest in thickness in the ground surface, is relatively large in thickness in the side surface of the cap rubber, is gradually increased in thickness from the ground surface to the side surface of the cap rubber, and is formed into a trumpet shape which is curved into an inner side in a tire width direction and an inner side in a radial direction, in a tire meridian cross section.
Claims4
A pneumatic tire comprising:
- a cap rubber which is formed of a nonconductive rubber and forms a ground surface;
- and
- a conductive portion which is provided in at least one side end portion of a pair of side end portions in both ends in a tire width direction of the cap rubber,
- a strip rubber which is formed of a conductive rubber and covers a side surface of the cap rubber,
- wherein the conductive portion is formed of a conductive rubber, and reaches a side surface of the cap rubber from the ground surface through an inner portion of the cap rubber,
- the conductive portion is the smallest in a thickness in the ground surface, is relatively large in a thickness in the side surface of the cap rubber, is gradually increased in the thickness from the ground surface to the side surface of the cap rubber, and is formed into a trumpet shape which is curved into an inner side in a tire width direction and an inner side in a radial direction, in a tire meridian cross section,
- the strip rubber is formed by a rubber which has a lower rubber hardness than the cap rubber, and does not form any ground surface, and
- the conductive portion passes through the strip rubber.
Dependencies are inferred from the claim text.