Signals and indicators – Street traffic – Portable
Patent
1993-07-15
1995-02-28
Cuchlinski, Jr., William A.
Signals and indicators
Street traffic
Portable
404 16, E01F 906
Patent
active
053927281
ABSTRACT:
Roadway markers (11) with large rectangularly shaped bases and a raised rumble portion containing at least one concave curved edge (21, 23) are disclosed. The concave curved edges (21, 23) face oncoming traffic. The concavity may have a constant radius of curvature or may decrease with increased elevation. The height-to-width ratio of the roadway marker and the average radius of curvature are such that automobile tires (41) impacting the roadway marker (11) do not impact the surface of the concavity. Rather, tires (41 ) impacting the roadway marker ( 11 ) hit the marker above the edge concavity. As a result, a gap exists between impacting tires and the surface of the concavity. Water squeezed from a wet tire impacting the roadway marker will enter the gap and wash the surface of the concavity. A reflective tape (31) is attached to the surface of the concavity. In some embodiments of the invention concavities are located in opposite edges of the raised rumble portion. In other embodiments, a single concavity is located along only one edge of the raised rumble portion. In the two-edge versions of the invention, preferably, a recess (19) is located between the parallel concave curved edges.
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Glutting Harry J.
Sly Michael W.
Speer Peter A.
Beres John L.
Cuchlinski Jr. William A.
Davidson Plastic Company
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