Tire
US11679629B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 20, 2021 |
| Grant date | Jun 20, 2023 |
| Priority date | — |
| Expiry date | Jan 12, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60C2200/04
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
In a tire, a shape index of a reference ground contact surface is not less than 1.20 and not greater than 1.50. In the tire, a tread includes a cap layer, an intermediate layer formed such that a loss tangent of the intermediate layer at 30° C. is less than a loss tangent of the cap layer at 30° C. and a base layer formed such that a loss tangent of the base layer at 30° C. is less than the loss tangent of the intermediate layer at 30° C. In the radial direction, the intermediate layer is disposed outwardly of the base layer and the cap layer is disposed outwardly of the intermediate layer. In a shoulder land portion of the tread, a thickness of the cap layer at a center of an axial width is less than a thickness of the cap layer on the shoulder circumferential groove side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.