Composite rim
US6347839B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 2000 |
| Grant date | Feb 19, 2002 |
| Priority date | — |
| Expiry date | Sep 25, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60Y2200/13
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A composite bicycle tire rim constructed from layers or plys of a fiber reinforcement, preferably fiber glass, to provide a rim that has a weight that is comparable to an aluminum rim and as is strong as a steel rim. The composite rim is continuous, is formed as a hooked bead type rim to have inwardly pointing side wall hook ends that are for fitting into grooves formed in a tire side walls, mounting the tire thereto. The rim is formed on a circular mandrel by laying up groups of plys thereon, with four (4) plys of fiber glass laid up for each group. In which laying up, a first ply of the four plys is fitted onto the mandrel to where its fiber angle is parallel to the mold mandrel circumference, with a following ply laid thereon at a selected positive angle to a vertical axis, and a next ply is laid thereon at a negative angle to the vertical axis, and with a final ply of each group laid thereon to have its fibers perpendicular to a tangent to the mold circumference. Which fiber placement, for each group, creates a balanced laminate, without residual stress, that is not subject to dimensional deformity. The mandrel with the groups of fiber glass plys thereon, is placed in a mold ca…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.