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US 12,583,265 B2Granted
Pneumatic tire
AssigneeSumitomo Rubber Industries, Ltd.
InventorsShumpei Morita, Masumi Suzuki, Takashi Miki, Noboru Okabe
Life of this patent
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Abstract
A pneumatic tire has a carcass. The carcass includes a carcass ply extending from one bead portion to the other bead portion through a tread portion. The carcass ply is provided with at least one conductive thread extending from one bead portion to at least the tread portion. The conductive thread has an electrical resistance of 108 Ω/cm or less per unit length. The conductive thread has a stress of 13 N or less at 1% elongation.
Claims17
A pneumatic tire comprising:
- a tread portion;
- a pair of bead portions;
- and
- a carcass, wherein
- the carcass includes a carcass ply extending from one of the bead portions to the other one of the bead portions through the tread portion,
- the carcass ply is provided with one or more conductive threads extending from the one of the bead portions to at least the tread portion,
- each of the one or more conductive threads has an electrical resistance of 108 Ω/cm or less per unit length,
- each of the one or more conductive threads has a stress of 13 N or less at 1% elongation,
- each of the one or more conductive threads is a composite thread containing one or more conductive fibers each composed of lower-twisted filaments and one or more non-conductive fibers each composed of lower-twisted filaments,
- the composite thread is formed by upper-twisting the one or more conductive fibers and the one or more non-conductive fibers, and
- each of the one or more conductive threads extends in a wavy manner with a peak-to-peak amplitude from 0.5 to 1.5 mm and a wavelength from 30 to 80 mm.
8 more elements
A pneumatic tire comprising:
- a tread portion;
- a pair of bead portions;
- and
- a carcass, wherein
- the carcass includes a carcass ply extending from one of the bead portions to the other one of the bead portions through the tread portion,
- the carcass ply is provided with one or more conductive threads extending from the one of the bead portions to at least the tread portion,
- each of the one or more conductive threads has an electrical resistance of 108 Ω/cm or less per unit length and a stress of 13 N or less at 1% elongation,
- each of the one or more conductive threads extends in a wavy manner with a first amplitude while a center of the first amplitude forming a wave shape with a second amplitude in a tire circumferential direction larger than the first amplitude,
- the first amplitude is 2.0 mm or less, and
- the second amplitude is from 50 to 150 mm.
7 more elements
Dependencies are inferred from the claim text.