Manhole casting positioning apparatus and method

Abstract

The present invention provides an improvement in manhole casting positioning apparatus and methods. In particular there is provided a casting positioning apparatus; for positioning a casting in relation to an upper end of a manhole, which comprises an inner sleeve comprising a rigid hollow cylinder having an annular flange extending around the upper circumference thereof. The diameter of the cylinder is less than that of the manhole lid opening. An annular resilient rubber ring or skirt whose inner diameter is slightly less than the outer diameter of the inner sleeve and whose outer diameter is greater than that of the manhole lid opening is stretched around the outer surface of the cylindrical inner sleeve. The lower end of the cylindrical inner sleeve is inserted into the upper end of the manhole, and lowered until the lower surface of the rubber ring rests on the upper edge of the manhole lid. Pressure is then applied downwardly on the flange of the sleeve to push it down to the desired height and slope. The ring is then tightened in the selected position with a tightening band and the casting is then mounted in position on the flange of the inner sleeve. A cylindrical outer sleeve is then placed around the casting and concrete poured to fill the annular space between inner and outer sleeves to thereby secure the casting.

Dependencies are inferred from the claim text.