Patent ID: 7153057
Filing Date: 2006-12-26
Classification: E02D

Abstract:
1. An inflatable manhole insert comprising: a) a center cap; b) a closed, flexible member forming an inflatable body connected to the periphery of said manhole insert; c) a plurality of sealing veins extending from the outer circumference of said inflatable body; d) means for selectively inflating and deflating said inflatable body; e) a plurality of bolt recesses evenly spaced proximal the peripheral edge of said center cap; f) a connection ring integral with the inner circumference of said inflatable body and having a substance central recess disposed therein; g) a plurality of evenly spaced threaded bolt recesses disposed on said connection ring arranged to align with said bolt recesses of said center cap; and h) a plurality of bolts to pass through said center cap bolt recesses into said threaded connection ring bolt recesses and secure said center cap to said connection ring.