Pneumatic tire
AssigneeBridgestone Corporation
InventorsYasuo OHSAWA, Takuya YOSHIMI
Life of this patent
Estimating the term…
Abstract
In a pneumatic tire (1) that achieves both ride comfort and steering stability at a high level, a bead core (5) has a ratio of the maximum width of the core to the height of the core of 0.8 or less in a cross-section in the tire width direction. A cord (9) is provided in at least one part from a bead portion (2) to a sidewall portion (3) at an angle of 0 to 10° with respect to the circumferential direction. The cord (9) has an inflection point in a stress-strain curve, with a low elastic modulus in a low-strain region at or below the inflection point, and a high elastic modulus in a high-strain region above the inflection point.
Claims21
1-10. (canceled)
A pneumatic tire comprising:
- a pair of bead portions each containing a bead core;
- a pair of sidewall portions each connected to each of the pair of bead portions and extending outward in a radial direction;
- and a tread portion connecting the outer circumferential edges of the pair of sidewall portions;
- as well as
- a carcass arranged in such a manner that both ends thereof are each folded over the bead core in the pair of bead portions to form a toroidal shape from the sidewall portions to the tread portion;
- a belt provided on the outer circumferential side of a crown portion of the carcass;
- the bead core provided between a main body portion and a folding-over portion of the carcass in the bead portion;
- and
- a cord provided in at least one part from the bead portion to the sidewall portions at an angle of 0 to 10° with respect to the circumferential direction, wherein
- the bead core has a ratio of the maximum width of the core to the height of the core of 0.8 or less in a cross-section in the tire width direction, and
- the cord has an inflection point in a stress-strain curve, with a low elastic modulus in a low-strain region at or below the inflection point, and a high elastic modulus in a high-strain region above the inflection point.
Dependencies are inferred from the claim text.