Manhole cover

摘要

A manhole cover adapter system comprises an adapter assembly having a central passage and a wing structure which enables the system is to be embedded between pavement layers during installation. The manhole cover adapter further comprises an expansion joint assembly and, if required, an angular adjustment assembly for allowing uses in various construction scenarios upon various types of manholes.

主权项

1. A manhole cover adapter, comprising:
an adapter assembly having a cylinder with a center opening, an outward protruding rim, and a flat topped expansion joint housing below said rim, said expansion joint housing including an outwardly protruding, flat-topped inverted “U”-shaped cross-section; a wing assembly having a plurality of arms with inner ends attached to a top of said expansion joint housing and outer ends attached to a ring; an expanded metal layer over said wing assembly; and, an expansion joint having an inverted “T”-shaped cross-section with a leg that fits into said “U”-shaped cross-section; wherein said cylinder is dimensioned to support a manhole cover; and, wherein said expansion joint is dimensioned to provide gaps between its vertical surfaces and said expansion joint housing.