Low-profile raised retroreflective pavement marker
AssigneeMinnesota Mining and Manufacturing Company
InventorRobert D. DeMaster
Life of this patent
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Abstract
A low-profile raised retroreflective pavement marker that resists loosening and removal from a paved surface comprises a flat dead-soft base sheet and at least one elastically deformable retroreflector attached to one face of the base sheet so as to extend above the base sheet no more than about one centimeter.
Claims8
A low-profile raised retroreflective pavement marker that resists loosening and removal from a paved surface, comprising a flat dead-soft metal base sheet and a narrow elongated retroreflective strip adhered to one face of the base sheet;
- said strip being less than about one centimeter high, less than the base sheet in width, and comprised of an elastically deformable main body portion and an elastically deformable retroreflective structure that is united to the main body portion so as to form the exterior surface of at least portions of the strip, said exterior surface portions being at an angle of at least 20.degree. to the base sheet.
A low-profile raised retroreflective pavement marker that resists loosening and removal from a paved surface, comprising a flat dead-soft metal base sheet and at least one elastically deformable retroreflector that is attached to one face of the base sheet, is smaller in area than the base sheet, extends above the base sheet no more than about one centimeter so as to provide exterior surfaces that are at an angle of at least 20.degree. to the base sheet, and carries on said exterior surfaces a dense monolayer of retroreflective microspheres partially embedded in, and partially exposed out of the exterior surfaces.
Dependencies are inferred from the claim text.