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US 11,535,067 B2Granted
Pneumatic tire
AssigneeToyo Tire Corporation
InventorHaruka Kubo
Life of this patent
Estimating the term…
Abstract
A pneumatic tire includes: a bead core; a bead filler; a carcass ply; a side wall rubber that is arranged on the tire-outer-surface-side of the carcass ply and constitutes a tire outer surface; a chafer layer that is turned from the tire-inner-surface-side to the tire-outer-surface-side around the bead core and the bead filler and rolled up on an outer surface of the carcass ply; a pair of a tape rubber and a rear pad rubber 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; and a tread rubber, in which modulus values of the pair of the tape rubber and the rear pad rubber are higher than a modulus value of the side wall rubber, and the tread rubber contains silica.
Claims11
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;
- a pair of support rubbers in each side wall part 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;
- the pair of support rubbers in each side wall part include:
- a pad rubber adjacent to the tire-outer-surface-side of the rolled-up end of the chafer layer;
- and a tape rubber adjacent to the tire-inner-surface-side of the rolled-up end of the chafer layer;
- and
- a tread rubber forming the tread part,
- 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,
- in each side wall part a height position of an inner-diameter-side end of the tape rubber in the tire radial direction is located on the tire-inner-diameter-side further than the inner-diameter-side end of the rear pad rubber and in a range of −6% or more but not exceeding 2% of a tire reference cross-section height to an outer-diameter-side end surface of the bead core, and
- the tread rubber contains silica.
12 more elements
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;
- a pair of support rubbers in the form of a tape rubber and a rear pad rubber in each side wall part 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;
- and
- a tread rubber forming the tread part,
- 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,
- in each side wall part a height position of an inner-diameter-side end of the tape rubber in the tire radial direction is located on the tire-inner-diameter-side further than the inner-diameter-side end of the rear pad rubber and in a range of −6% or more but not exceeding 2% of a tire reference cross-section height to an outer-diameter-side end surface of the bead core,
- the tread rubber contains silica, and
- in each side wall part the rear pad rubber contains a Resorcin-containing formaldehyde condensate,
- wherein the pair of support rubbers include:
- the rear pad rubber adjacent to the tire-outer-surface-side of the rolled-up end of the chafer layer;
- and
- the tape rubber adjacent to the tire-inner-surface-side of the rolled-up end of the chafer layer.
14 more elements
Dependencies are inferred from the claim text.