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US 2022/0088973 A1Published application
Run-flat tire
AssigneeBridgestone Corporation
InventorMasahiro KATAYAMA
Life of this patent
Estimating the term…
Abstract
A run-flat tire has a belt-end reinforcing layer provided between the tread portion and a width outside end of the belt layer, and formed of a resin material. The belt-end reinforcing layer is annular along a tire circumferential direction, has a predetermined width along the tire width direction, and is provided in the tire width direction so as to cover a radial outside end of a side reinforcing rubber and a width outside end of the belt layer.
Claims10
1:
- A run-flat tire comprising:
- a tread portion in contact with a road surface;
- a belt layer provided inside a tire radial direction of the tread portion;
- a tire side portion continuous to the tread portion and positioned inside in the tire radial direction of the tread portion;
- a side reinforcing rubber provided in the tire side portion, wherein the fun-flat tire comprises a belt-end reinforcing layer formed of a resin material and provided between the tread portion and outside end in the tire width direction of the belt layer, wherein
- the belt-end reinforcing layer has an annular shape along a tire circumferential direction and has a predetermined width along the tire width direction, and
- in the tire width direction, the belt-end reinforcing layer is provided so as to cover an outside end in the tire radial direction of the side reinforcing rubber and an outside end in the tire width direction of the belt layer.
4 more elements
2:
- The run-flat tire according to claim 1, wherein the side reinforcing rubber and the belt layer have overlapping portion in the tire width direction and
- the belt-end reinforcing layer is provided to cover the overlapping portion.
3:
- The run-flat tire according to claim 1, wherein the belt layer is a belt having a circumferential cord extending along the tire circumferential direction coated with a resin material.
4:
- The run-flat tire according to claim 1, wherein the belt layer is a pair of crossing belts having belt cords crossing each other.
5:
- The run-flat tire according to claim 1, comprising a resin reinforcing layer provided from one shoulder portion of the tread portion to the other shoulder portion of the tread portion, wherein
- the resin reinforcing layer is formed of a resin material and is provided between the belt-end reinforcing layer and the belt layer.
6:
- The run-flat tire according to claim 2, wherein the belt layer is a belt having a circumferential cord extending along the tire circumferential direction coated with a resin material.
7:
- The run-flat tire according to claim 2, wherein the belt layer is a pair of crossing belts having belt cords crossing each other.
8:
- The run-flat tire according to claim 2, comprising a resin reinforcing layer provided from one shoulder portion of the tread portion to the other shoulder portion of the tread portion, wherein
- the resin reinforcing layer is formed of a resin material and is provided between the belt-end reinforcing layer and the belt layer.
9:
- The run-flat tire according to claim 3, comprising a resin reinforcing layer provided from one shoulder portion of the tread portion to the other shoulder portion of the tread portion, wherein
- the resin reinforcing layer is formed of a resin material and is provided between the belt-end reinforcing layer and the belt layer.
10:
- The run-flat tire according to claim 4, comprising a resin reinforcing layer provided from one shoulder portion of the tread portion to the other shoulder portion of the tread portion, wherein
- the resin reinforcing layer is formed of a resin material and is provided between the belt-end reinforcing layer and the belt layer.