Base for roadway marker
AssigneeStimsonite Corporation
InventorThomas P. Boyce
Life of this patent
Estimating the term…
Abstract
A roadway marker comprises shell molded of suitable plastic and having an internal honeycomb configuration. A base plate extends over the lower surface of the shell covering the honeycomb arrangement and defining a plurality of chambers internal to the shell. The plate is provided with a plurality of apertures, each opening to a chamber. When the marker is installed, adhesive material flows through the apertures and into the chambers. Before the adhesive sets, it forms mushroomed-shaped configurations over the top inside surface of the plate. The mushroomed configurations create a strong mechanical bond between the plate and the associated roadway surface. The large lower surface area of the plate also enhances bonding of the marker to the roadway.
Claims8
A roadway marker comprising:
- a shell having an upper exposed surface, a lower surface portion and a central opening defined in said lower surface portion;
- a plurality of ribs formed internal to said shell, said ribs being arranged to form discrete chambers within said shell;
- a base plate connected to said shell and covering said ribs and said opening, said plate having a generally planar lower surface and a generally planar upper surface internal to said shell;
- and
- a plurality of apertures formed through said plate, each aperture communicating with a chamber defined by said ribs;
- wherein adhesive flows through said apertures and mushrooms above said upper surface of said plate within said chambers when said marker is adhered to a roadway surface.
Dependencies are inferred from the claim text.