Utility trench cover and manufacturing method

Details Utility trench cover and manufacturing method Utility trench cover and manufacturing method

2011-07-12

2011-07-12

Lillis, Eileen (Department: 3635)

Static structures (e.g., buildings)

With entrance for persons or objects in horizontal or...

With additional enclosure structure; e.g., manhole

C052S019000, C052S220300, C052S220700, C404S025000

Reexamination Certificate

active

07975436

ABSTRACT:
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.

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