Raised pavement marker with improved lens
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 22, 2003
Grant Date -
Dec 6, 2001
app pub date -
Feb 7, 2001
filing date -
Feb 24, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present disclosure relates to improved raised pavement markers having a totally-internal-reflective lens. The disclosure also relates to methods of manufacturing the raised pavement marker. The raised pavement markers described below include a housing connected to a totally-internal-reflective lens. The totally-internal-reflective lens includes a retroreflective element having a smooth surface generally opposite a plurality of cube corner elements. A film is attached to the retroreflective element at the apexes of the cube corner elements to form spaces, i.e., an air gap, between the film and the cubes. The film and retroreflective element cooperate to form the totally-internal-reflective lens. Light entering the retroreflective element through the smooth surface is retroreflected at the cube/air interface. Methods of manufacturing include, for example, forming a shell with the retroreflective element and attaching the film to the apexes of the cube corner elements.
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