Pneumatic radial tire with specified bead reinforcing layer
US5958163A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 27, 1997 |
| Grant date | Sep 28, 1999 |
| Priority date | — |
| Expiry date | May 27, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T152/10846
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A pneumatic radial tire includes a carcass ply formed from one radial cord layer, a belt and tread disposed at a crown portion radial direction outer side of the carcass ply, and bead fillers and bead reinforcing layers disposed at the bead portions, wherein the carcass ply is formed from a carcass ply main body extending from one bead portion to another, and carcass ply turn-over portions wound about bead cores and extending toward radial direction outer sides. The bead filler is interposed between the carcass ply main body and the carcass ply turn-over portion, and tapers from directly above the bead core toward a radial direction outer side. The bead reinforcing layer is interposed between the carcass ply main body and the bead filler. An upper end of the bead reinforcing layer extends along the carcass ply main body to a position at 30 to 80% of a tire cross-sectional height, and is disposed further toward a radial direction outer side than an upper end of the bead filler. The bead reinforcing layer is formed from a rubber covered cord layer in which organic fiber cords having a modulus of elasticity of 700 to 1500 kg/mm.sup.2 are embedded in parallel in rubber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.