Covering apparatus for opening of underground pipeline or box

Details Covering apparatus for opening of underground pipeline or box Covering apparatus for opening of underground pipeline or box

E - Fixed Constructions

02

D

E02D 29/14 (2006.01) F16J 13/00 (2006.01)

Patent

CA 2529643

A covering apparatus includes a seat assembly and a cover. The seat assembly includes at least a seat with a plurality of flights on an internal side. Each of the flights includes a plurality of steps. The cover includes, on a lower side along an edge, a plurality of flights corresponding to the flights of the seat. Each of the flights of the cover includes a plurality of steps corresponding to the steps of each of the flights of the seat. Various combinations of the steps of each of the flights of the cover can be positioned on related combinations of the steps of each of the flights of the seat so that the cover can be positioned on various levels on the seat.

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