Spoked wheel reflector employing encapsulated retroreflective tubing
US4943139A · kind A · utility
5Cited by
9References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1988 |
| Grant date | Jul 24, 1990 |
| Priority date | — |
| Expiry date | Sep 19, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A retroreflective tubing adapted to be interwined among spokes of a wheel, comprising a core material, retroreflective microspheres attached to an outer surface of the core material, and a protective encapsulating material surrounding the microspheres. In a preferred embodiment, the cross section of the core material is U-shaped to maximize the retroreflective performance of the tubing, and the encapsulating material provides a multiplicity of sealed airspaces between the outer surface of the retroreflective microspheres and the inner surface of the encapsulating material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.