Pneumatic tire
US11472947B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 26, 2018 |
| Grant date | Oct 18, 2022 |
| Priority date | — |
| Expiry date | Mar 19, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/86
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
In a pneumatic tire, a tread portion comprises longitudinal and/or lateral grooves; a groove area ratio of a vehicle inner side region of the tread portion ranges from 30% to 39%; a difference between the groove area ratio Sin and a groove area ratio Sout ranges from 6-14%; and the rubber composition comprises a diene rubber comprising from 10-30 parts by mass of natural rubber and from 70-90 parts by mass of a solution polymerized styrene-butadiene rubber and/or an emulsion polymerized styrene-butadiene rubber per 100 parts by mass of the diene rubber, from 80-150 parts by mass of silica per 100 parts by mass of the diene rubber, from 0.5-10 parts by mass of a cyclic polysulfide per 100 parts by mass of the diene rubber, and from 3-10 mass % of an alkyltriethoxysilane having an alkyl group having from 3-20 carbons relative to an amount of the silica.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.