Tire tread having improved rigidity
US9174493B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 28, 2010 |
| Grant date | Nov 3, 2015 |
| Priority date | — |
| Expiry date | Mar 5, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60C11/1307
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Tire tread having at least two wearing layers, provided with at least one continuous groove having in the as new condition a plurality of external cavities opening onto the tread surface and a plurality of internal cavities placed radially and completely inside the tread surface, such that: the difference between the mean lengths of the internal cavities and of the external cavities is at most equal to 20% of the longest mean length, the difference in the mean cross-sectional areas of the internal and external cavities is at most equal to 20% of the largest mean area, each external cavity of a continuous groove being connected to at least two internal cavities of the same groove and having a plurality of incisions opening onto the tread surface, each connecting two consecutive external cavities of the same groove and at least two connecting channels and at least one internal cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.