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US 12,024,845 B2Granted
Method for manhole riser extensions
OwnerMichael Critesinventor
Life of this patent
Estimating the term…
Abstract
A manhole riser system including upper and lower flanged rings with an adjustable height sleeve for raising the height of the manhole support cover frame to a new pavement level. The adjustable height sleeve is cut and overlapped for various dimensions and a pavement grade marking assembly provides for custom height cutting during placement assembly within the manhole.
Claims9
A method for removing and raising manhole fittings comprising,
- cutting and removing a disk-shaped portion of the paved roadway with a manhole fitting within,
- placing a partially configured riser sleeve within an opening defined by the paved roadway,
- positioning a surface alignment marking tool and marking said riser sleeve about its exterior annular surface,
- cutting the riser sleeve along its annular surface marking,
- securing a riser flange ring on the cut edge surface of the riser sleeve,
- securing a riser and ring flange assembly within the opening defined by the paved roadway,
- securing a manhole cover support frame onto the riser flange ring,
- back filling the opening about the completed riser sleeve and manhole cover support frame.
5 more elements
Dependencies are inferred from the claim text.