초록 ▼

A raised road marker has a flat bottom surface with an outer periphery. At least one cavity opens onto the bottom surface laterally inwardly of the periphery and extends upwardly into the marker body. A venting groove extends along the bottom surface from the cavity to the periphery to provide a ven

A raised road marker has a flat bottom surface with an outer periphery. At least one cavity opens onto the bottom surface laterally inwardly of the periphery and extends upwardly into the marker body. A venting groove extends along the bottom surface from the cavity to the periphery to provide a vent for air trapped in the cavity when the marker is urged into a pool of adhesive to secure the marker to a roadway. The venting of air provides a stronger bond between the marker and adhesive. Markers having a rounded top surface may be provided with a flat bottom portion with abutment surfaces to facilitate movement of a line of the markers in an automated system.

대표청구항 ▼

[ What is claimed is:] [1.] A raised road marker comprising a body having a top surface, a substantially flat bottom surface with an outer periphery, at least one cavity opening onto said bottom surface laterally inwardly of said periphery and extending upwardly into said body, and a venting groove

[ What is claimed is:] [1.] A raised road marker comprising a body having a top surface, a substantially flat bottom surface with an outer periphery, at least one cavity opening onto said bottom surface laterally inwardly of said periphery and extending upwardly into said body, and a venting groove extending along said bottom surface from said cavity to said periphery to provide a vent for air trapped in said cavity when the marker is urged onto a pool of adhesive;wherein said venting groove comprises a plurality of spaced groove sections arranged symmetrically on said bottom surface, each section extending from said periphery toward a center portion of said bottom surface and being tapered from an inner portion of said section to said periphery to create an increase in air pressure at said periphery as air exits said section; andwherein said cavity and said venting groove open onto said bottom surface but are closed to communication with said top surface.