Low noise level tire
US6216757A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 11, 1994 |
| Grant date | Apr 17, 2001 |
| Priority date | — |
| Expiry date | Oct 11, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60C2011/147
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A low noise level tire includes a carcass composed of at least one ply toroidally extending between a pair of bead cores, and a tread arranged radially outwardly of the carcass and composed of an outer cap rubber layer and an inner base rubber layer. The cap rubber layer is made of a rubber having a dynamic storage modulus of not less than 1.0.times.10.sup.8 dyn/cm.sup.2 and not more than 2.0.times.10.sup.8 dyn/cm.sup.2 and a loss tangent more than 0.15 and not more than 0.35. The base rubber layer is made of a rubber having a dynamic storage modulus of not less than 1.2.times.10.sup.8 dyn/cm.sup.2 and not more than 2.2.times.10.sup.8 dyn/cm.sup.2 and a rate of foaming of not less than 5% and not more than 50%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.