Heavy load pneumatic tire
AssigneeBridgestone Corporation
InventorsYudai KATTO, Kohei HASEGAWA
Life of this patent
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Abstract
A heavy load pneumatic tire includes a carcass ply and a belt layer. The carcass ply includes a first curvature change portion that is a boundary between a first segment and a second segment and whose curvature is larger than a curvature of the first segment in a cross-section, and a second curvature change portion that is a boundary between the second segment and a third segment and whose curvature is smaller than the curvature of the second segment on the cross section. The tire further includes a cushion rubber whose inner edge is located at the first curvature change portion and that is disposed between the carcass ply and the belt layer.
Claims4
A heavy load pneumatic tire comprising:
- a tread section to be contacted with a ground surface;
- a tire side section that extends from the tread section and is located inside the tread section in a tire radial direction;
- a bead section that extends from the tire side section and is located inside the tire side section in the tire radial direction;
- a carcass ply that is mounted from the tread section through the tire side section to the bead section to form a framework of the pneumatic tire;
- and
- a belt layer that is disposed in the tread section and is located outside the carcass ply in the tire radial direction,
- wherein the carcass ply includes
- a first curvature change portion that is a boundary between a first segment that contains a tire equator line and a second segment that is located outside the first segment in a tire width direction and inside the first segment in the tire radial direction and whose curvature is larger than a curvature of the first segment in a cross section determined by the tire width direction and the tire radial direction, and
- a second curvature change portion that is a boundary between the second segment and a third segment that is located inside the second segment in the tire radial direction and whose curvature is smaller than the curvature of the second segment on the cross section, and
- wherein the tire further comprises a cushion rubber whose inner edge in the tire width direction is located at the first curvature change portion and that is disposed between the carcass ply and the belt layer.
Dependencies are inferred from the claim text.