Tactile tile
AssigneeKeefe-Dickson Corporation Inc.
InventorRobert F. Keefe
Life of this patent
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Abstract
A tactile tile having a flat plate with a plurality of raised areas, said plate and raised areas comprised of polyurethane.
Claims20
In a tactile tile having a flat plate with a plurality of raised areas, said plate and raised areas comprised of polyurethane, wherein said polyurethane has a taber abrasion resistance of less than 500 milligrams per ten thousand cycles based on ASTM method D with a H-18 wheel.
In a tactile tile having a flat plate with a plurality of raised areas, said plate and raised areas comprised of polyurethane wherein said polyurethane exhibits a -40.degree. centigrade glass transition temperature.
In a tile for positioning on a road surface to provide direction for visually handicapped persons comprising:
- (a) a flat plate having an upper surface and a lower surface;
- (b) a plurality of raised areas diagonally disposed on said upper surface;
- (c) an epoxy adhesive presented on said lower surface for adhering said tile to said road surface;
- (d) said flat plate and plurality of raised areas comprised of thermo plastic polyurethane having a -40.degree. centigrade glass transition temperature so as to resist shearing of said raised areas from said flat plate in cold temperatures.
Dependencies are inferred from the claim text.