Grating
AssigneeSelf-Level Covers Aktiengesellschaft
InventorDerek Ferns
Life of this patent
Estimating the term…
Abstract
A grating to cover a drain for a paved surface such as a road comprises a set of parallel bars interconnected by spacers. In the central part of the grating, adjacent pairs of bars each have only one spacer therebetween, the spacers being positioned alternately at opposite ends of the bars. This allows the grating to be compressed during insertion into a support frame so that, when the force causing such a compression is removed after insertion, lugs on the grating move into locking engagement with the frame.
Claims12
A grating in combination with a support frame adapted to support the grating in a paved surface, the support frame having a hollow structure, whose cross-section generally matches that of the grating, and internal support means for supporting the grating so that its top surface is substantially level with the paved surface, the grating being constituted by a pair of end bars, a plurality of intermediate bars spaced between the end bars, a plurality of spacers and locking formations on the end bars, the spacers being positioned to provide a tortuous path for transmission of thrust perpendicular to the bars and the grating being made of a material such that the grating is resiliently compressible whereby the energy stored in the grating by such resilient compression forces, in use, retains said locking formations in engagement with the support frame.
Dependencies are inferred from the claim text.