Tire with improved beads
US9248704B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 16, 2012 |
| Grant date | Feb 2, 2016 |
| Priority date | — |
| Expiry date | Jan 19, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60C2015/0621
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Tire comprising two beads comprising an annular reinforcing structure, a carcass reinforcement anchored in the two beads so as to form a main portion and a wrapped-around portion, each wrapped-around portion extending radially outwards as far as an end situated at a radial distance DEC that is less than or equal to 10% of the radial height H of the tire; each bead comprising an apex made of a rubber composition having an elastic modulus greater than 40 MPa, extending radially as far as a radial distance DEE1 comprised between 10% and 15% of the height H; each bead further comprising an outer strip made of a rubber composition that has an elastic modulus G′ less than or equal to 15 MPa and a viscous modulus G″ such that: G″[MPa]≦0.2·G′[MPa]−0.2 MPa, extending at least between 20% and 25% of the height H, the apex having an axial thickness E(r) that is substantially a linear function of r, r denoting the distance with respect to the radially innermost point of the annular structure, wherein the entity formed by the apex and outer strip has a thickness ET(r) such that, in the range of distances r comprised between 25 and 45% of the height H of the tire, the variation in thicknessis ne…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.