Tire tread
US9969222B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 8, 2011 |
| Grant date | May 15, 2018 |
| Priority date | — |
| Expiry date | Dec 8, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60C2011/129
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The invention relates to an asymmetric tread for a tire comprising a plurality of basic patterns, for each of which there is defined a sipes density corresponding towhere i is the number of sipes in the pattern, li is the length of the ith sipe on the tread surface, P is the pitch of the basic pattern and Wm is the width of the basic pattern, a sipes orientation level corresponding towhere αi is the positive or negative angle formed on the tread surface by the ith sipe with the transverse direction and |αi|≤45 degrees and a steering pull criterion for the basic pattern corresponding toThe sipes density is greater than or equal to 60 μm/mm2, the sipes orientation level is greater than or equal to 1.5 degrees/mm and the steering pull criterion for the pattern is less than or equal to 0.2. The tread comprises an inboard half-tread adjacent to an inboard sidewall of the tire, the sipes orientation level relating to the inboard half-tread being greater than 2 degrees/mm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.