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US 5,327,850 AGranted
Roadway marker
AssigneeDavidson Plastics Corporation
InventorsMichael W. Sly, Peter A. Speer, Harry J. Glutting
Life of this patent
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AssigneeDavidson Plastics Corporation
InventorsMichael W. Sly, Peter A. Speer, Harry J. Glutting
Estimating the term…
An extrudable roadway marker (11) is provided having enhanced stability. The roadway marker has a constant cross section along a centerline (A--A) that allows the roadway marker to be manufactured by extrusion. The base (13) of the roadway marker has a series of adjacent parallel grooves (27) that provide a large adhesive surface. Downwardly extending gripping edges (19) assist in attaching the roadway marker to a roadway surface. In one form, the sides of the roadway marker have reflective tape recesses (17) for receiving and protecting reflective strips 23. A raised rumble portion (15) provides a physical rumbling cue. A recess (25) reduces the weight of the roadway marker. The ends of the marker can be sheared flat or inclined. The parallel grooves may form sharp teeth where they join. The sharp teeth project away from the center of the roadway marker.
An extruded nonmetallic roadway marker having a planar base area for attachment to a roadway surface and a raised rumble portion, said base area having a plurality of parallel adjacent grooves, said grooves lying parallel to a centerline, said grooves:
An extruded nonmetallic roadway marker having a planar base area for attachment to a roadway surface and a raised rumble portion, said base area having a plurality of parallel adjacent grooves, said grooves lying parallel to a centerline, said base area of substantially rectangular shape, said rectangular shape defined in part by two wings located on either side of and lying parallel to said centerline, said wings terminating in gripping edges lying parallel to said centerline, said gripping edges curving downwardly from said base area, said raised rumble portion lying inside of said wings and extending upwardly from said base area, the width of each of said wings being substantially less than the width of said raised rumble portion, said raised rumble portion having two parallel lateral sides and a top area, said raised rumble portion having a constant cross section along a substantial portion of the entire length of said centerline, said top area of said raised rumble portion scalloped to form a recess, said recess having a radius of curvature between two inches and ten inches.
An extruded nonmetallic roadway marker having a planar base for attachment to a roadway surface and a raised rumble portion, said base area having a plurality of parallel adjacent grooves, said grooves lying parallel to a centerline, said base area of substantially rectangular shape, said rectangular shape defined in part by two wings located on either side of and lying parallel to said centerline, said wings terminating in gripping edges lying parallel to said centerline, said gripping edges curving downwardly from said base area, said raised rumble portion lying inside of said wings and extending upwardly from said base area, the width of each of said wings being substantially less than the width of said raised rumble portion, said raised rumble portion having two parallel lateral sides and a top area, said raised rumble portion having a constant cross section along a substantial portion of the entire length of said centerline, said lateral sides of said raised rumble portion inclined to said base area at an angle lying between 75.degree. and 80.degree., said raised rumble portion including two overhanging lips, said overhanging lips extending laterally from the top of said lateral sides of said raised rumble portion, said overhanging lips and lateral sides forming recesses for receiving a reflective strip, said top area of said raised rumble portion scalloped to form a recess, said recess having a radius of curvature between two inches and ten inches.
An extruded nonmetallic roadway marker having a planar base area for attachment to a roadway surface and a raised rumble portion, said base area having a plurality of parallel adjacent grooves, said grooves lying parallel to a centerline, said base area of substantially rectangular shape, said rectangular shape defined in part by two wings located on either side of and lying parallel to said centerline, said wings terminating in gripping edges lying parallel to said centerline, said gripping edges curving downwardly from said base area, said raised rumble portion lying inside of said wings and extending upwardly from said base area, the width of each of said wings being substantially less than the width of said raised rumble portion, said raised rumble portion having two parallel lateral sides and a top area, said raised rumble portion having a constant cross section along a substantial portion of the entire length of said centerline, the ends of said roadway marker lying orthogonal to said centerline inclined upwardly and toward one another.
Dependencies are inferred from the claim text.