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US 12,661,936 B2Granted
Pneumatic tire
AssigneeBridgestone Corporation
InventorsShintaro Hatanaka, Isao Kuwayama
Life of this patent
Estimating the term…
Abstract
Provided is a pneumatic tire including: a pair of bead cores embedded in a pair of bead portions; and a carcass including one or more carcass plies extending in a toroidal form between the pair of bead cores, wherein bead fillers are disposed on an outer side in a tire radial direction of the bead cores, rubber chafers are provided on an outer side in a tire width direction of the bead fillers, and when a storage modulus of the bead fillers is E1′, and a storage modulus of the rubber chafers is E2′, the ratio E2′/E1′ satisfies 0.4≤E2′/E1′ ≤1.
Claims8
A pneumatic tire comprising:
- a pair of bead cores embedded in a pair of bead portions;
- and
- a carcass including one or more carcass plies extending in a toroidal form between the pair of bead cores, wherein
- the carcass includes a carcass body portion extending in a toroidal form between the pair of bead portions, and carcass fold-up portions being folded from the carcass body portion around the bead cores from an inner side in a tire width direction to an outer side in the tire width direction,
- elastomeric bead fillers are disposed one on an outer side in a tire radial direction of each of the bead cores,
- rubber chafers are provided one on the outer side in the tire width direction of each of the bead fillers,
- when a storage modulus of the bead fillers is E1′, and a storage modulus of the rubber chafers is E2′, the ratio E2′/E1′ satisfies 0.6≤E2/E1′≤1,
- a height of the bead fillers is 25 mm or less,
- outer ends in the tire radial direction of the carcass fold-up portions are located further inward in the tire radial direction than a tire maximum width position,
- the rubber gauge at the tire maximum width position is 3 mm or less, and
- in the region radially outward of an innermost point of the respective bead filler, each of the rubber chafers is in direct contact with an entire outer side in the tire width direction of a respective one of the carcass fold-up portions.
8 more elements
Dependencies are inferred from the claim text.