Pneumatic tire
AssigneeToyo Tire Corporation
InventorTatsuya Yamamoto
Life of this patent
Estimating the term…
Abstract
A pneumatic tire includes a pair of bead cores; a pair of bead fillers that are connected to the pair of bead cores; a carcass ply that is suspended between the pair of bead cores; a side wall rubber that is arranged on a tire-outer-surface-side of the carcass ply and constitutes a tire outer surface; a chafer layer that is turned from a tire-inner-surface-side to the tire-outer-surface-side around the bead cores and the bead fillers and rolled up on an outer surface of the carcass ply; and a pair of support rubbers that are located between the side wall rubber and the carcass ply and arranged so as to hold a rolled-up end of the chafer layer from both sides in a tire width direction. A modulus values of the pair of support rubbers are higher than a modulus value of the side wall rubber.
Claims9
A pneumatic tire comprising:
- a tread part;
- a pair of side wall parts that extend radially inwardly from widthwise ends of the tread part;
- a pair of bead parts located at respective radially inner ends of the pair of side wall parts, each bead part comprising a bead core and a bead filler that is connected to the bead core and extends to an outer-diameter-side in a tire radial direction;
- a carcass ply that is suspended between the bead cores;
- a side wall rubber in each side wall part that is arranged on a tire-outer-surface-side of the carcass ply and constitutes a tire outer surface;
- a chafer layer in each side wall part that is arranged adjacent to the outer surface side of the carcass ply and is turned from a tire-inner-surface-side to the tire-outer-surface-side around the bead core and the bead filler and rolled up to the outer-diameter-side in the tire radial direction together with the carcass ply;
- and
- a pair of support rubbers in each side wall that are located between the side wall rubber and the carcass ply and arranged so as to hold a tire-outer-surface-side rolled-up end of the chafer layer from both sides in a tire width direction,
- wherein in each side wall part the 100% modulus values of the pair of support rubbers are higher than the 100% modulus value of the side wall rubber,
- and
- the pair of support rubbers includes:
- a pad rubber that is arranged adjacent to an outer surface side on the tire-outer-surface-side rolled-up end of the chafer layer and adjacent to an inner surface side on the side wall rubber;
- and
- a tape rubber that is arranged adjacent to an inner surface side on the tire-outer-surface-side rolled-up end of the chafer layer and adjacent to the outer surface side on the carcass ply.
Dependencies are inferred from the claim text.