Bead for a tire for a civil-engineering heavy vehicle
US11590809B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 17, 2019 |
| Grant date | Feb 28, 2023 |
| Priority date | — |
| Expiry date | Jul 17, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60C2200/065
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Improving the endurance of the beads (1) of a radial tire for a civil-engineering heavy vehicle by proposing a solution which blocks the propagation of the cracks initiated in the coating elastomer of the bead reinforcing layer (5), by inserting a cushion rubber (6) interposed between the coating elastomer of the carcass layer turn-up (312) and the coating elastomer of the bead reinforcing layer (5). The elastic modulus in extension of the cushion rubber (6) measured at 100% deformation must be less than the elastic modulus of the coating compound of the carcass layer. Still according to a disclosed embodiment, the thickness of the cushion rubber (6) is at least equal to the thickness of the bead reinforcing layer (5).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.