초록 ▼

A cover for a utility trench includes upper and lower surfaces enclosing a hollow cavity, which is subdivided by multiple, transverse channels recessed into an extending transversely across the lower surface. The channels form fused engagements or “kiss offs” with the upper surface, which increase t

A cover for a utility trench includes upper and lower surfaces enclosing a hollow cavity, which is subdivided by multiple, transverse channels recessed into an extending transversely across the lower surface. The channels form fused engagements or “kiss offs” with the upper surface, which increase the transverse rigidity of the cover for enhanced load-bearing capacity spanning across the opening formed by the trench. The hollow construction of the cover, which can comprise a suitable plastic, tends to minimize its weight A pair of flanges extend along respective sides of the cover and are bolted to the trench sidewall top edges in overlying relation. A pair of shoulders are formed inside the flanges and are adapted to extend into the trench with the cover positioned thereover. A method of manufacturing a utility trench cover includes rotary molding a hollow cover with kiss offs.

대표청구항 ▼

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is: 1. A cover for an opening between a spaced pair of sidewalls with top edges, which cover includes:upper and lower panels with upper and lower surfaces respectively, said panels being positione

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is: 1. A cover for an opening between a spaced pair of sidewalls with top edges, which cover includes:upper and lower panels with upper and lower surfaces respectively, said panels being positioned in spaced relation;first and second opposite ends;first and second opposite side edges;a pair of flanges each flange located at a separate respective side edge;a pair of shoulders each shoulder extending downwardly from a respective flange and located in spaced relation inwardly from a respective side edge;said lower panel including an elongated recess extending generally transversely between said shoulders; andsaid lower panel being bonded to said upper panel defining a cavity between each respective flange, shoulder, and upper panel.