Abrasion resistant coating for pavement marker
US5098217A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 1990 |
| Grant date | Mar 24, 1992 |
| Priority date | — |
| Expiry date | May 23, 2010 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01F9/553
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A pavement marker for a roadway surface includes a lower base portion and a retro-reflective lens mounted on the base portion at an angle to it. A photopolymerizable clear acrylic protective hard coat is deposited over and integrally formed with the front face of the lens for resisting abrasion of the lens and reducing the loss of optical efficiency resulting from such abrasion. The pavement marker also includes a frame of generally arcuate cross-section formed about an edge of the hard coat potentially susceptible to peeling from impact of vehicle tires against the hard coat. The frame is preferably formed as a bead raised from the face of the marker, and the bead includes a sharp interior edge lying generally perpendicular to the lens, adjacent the edge of the hard coat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.