Pneumatic tire
AssigneeToyo Tire & Rubber Co., Ltd.
InventorMakoto Yoshikawa
Life of this patent
Estimating the term…
Abstract
A pneumatic tire has a carcass ply and a side wall rubber provided in outer sides of the carcass ply. The carcass ply has joint portions obtained by overlapping end portions of ply members so as to join. At least one of the joint portions is provided with a rubber tape. The rubber tape is interposed between the end portions of the ply members and is exposed to a surface of the carcass ply. A topping rubber of the carcass ply and the side wall rubber are formed by a nonconductive rubber. The rubber tape is formed by a conductive rubber. A conductive route getting to the rubber tape from a ground-contacting surface is formed in a tread portion. A conductive route getting to the rubber tape from an outer surface of a bead portion is formed in the bead portion.
Claims4
A pneumatic tire comprising:
- a pair of bead portions;
- side wall portions which extend to outer sides in a tire diametrical direction respectively from the bead portions;
- a tread portion which is connected to an outer end in the tire diametrical direction of each of the side wall portions;
- a carcass ply which gets to the bead portion from the tread portion via the side wall portion;
- and
- side wall rubbers which are provided in outer sides of the carcass ply in the side wall portions,
- wherein the carcass ply has joint portions obtained by overlapping end portions of ply members so as to join, at a plurality of positions in a tire circumferential direction, and at least one of the joint portions is provided with a rubber tape which is interposed between the end portions of the ply members and is exposed to a surface of the carcass ply,
- wherein a topping rubber of the carcass ply and the side wall rubber are formed by a nonconductive rubber, and the rubber tape is formed by a conductive rubber, and
- wherein a conductive route getting to the rubber tape from a ground-contacting surface which can come into contact with a road surface is formed in the tread portion, and a conductive route getting to the rubber tape from an outer surface of the bead portion which can come into contact with a rim is formed in the bead portion.
Dependencies are inferred from the claim text.