All-season pneumatic tire with chamfered tread blocks
US4690189A · kind A · utility
63Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1986 |
| Grant date | Sep 1, 1987 |
| Priority date | — |
| Expiry date | Jan 29, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S152/902
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
All-season radial-ply pneumatic tire for passenger and light truck vehicles. A rubber tread is positioned radially outwardly of a carcass ply and belt structure. The tread has grooves that define blocks of rubber spaced apart circumferentially around the tread. Circumferentially-spaced corners of the rubber blocks are chamfered toward the respective bottoms of the grooves, thereby, to increase their respective stiffnesses to improve their uniformity of wear and also to reduce the amplitude of sound frequencies generated by the tire in normal use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.