Tire with improved beads
US9205709B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 26, 2012 |
| Grant date | Dec 8, 2015 |
| Priority date | — |
| Expiry date | Dec 7, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60C15/0603
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Tire comprising a carcass reinforcement and two beads, each comprising at least one annular reinforcing structure, a bead filler and an outer strip made from a rubber composition having an elastic modulus G′ of less than or equal to 15 MPa and a viscous modulus G″ such that G″ [MPa]≦0.2·G′ [MPa]−0.2 MPa, wherein the bead filler has a thickness E(r) perpendicular to the carcass reinforcement with the bead filler, r denoting the distance from the radially innermost point of the annular reinforcing structure, wherein the assembly formed by the bead filler and the outer strip has a thickness ET(r), wherein the thickness ET(r) changes such that, in the range of distances r comprised between 25 and 45% of the height H of the tire, the variation in thickness is less than or equal to −0.25 mm/mm over at least 4% of the height H, wherein, for all the points of which the distance r is greater than 10% and less than 35% of the height H, the ratio E(r)/ET(r) is greater than 0.3 and less than or 0.5, wherein, in any radial section, the bead filler has a cross section of area S1 and the outer strip has a cross section of area S2, the ratio S1/(S1+S2) being greater than 0.4 and less than 0.6, and…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.