Process for raising manholes
OwnerRonald D. Vollmarinventor
Life of this patent
Estimating the term…
Abstract
A process for raising manholes and manhole covers to a new grade level of a street when constructing new streets or when paving old streets, comprising the steps of placing a sealing means around the interior of the cast manhole between the lower edge thereof and the upper edge of a sewer catch basin, and pouring wet concrete around the exterior of manhole, the sealing means, and the upper edge of the sewer catch basin to form a continuous joint between the manhole at the raised grade level and the upper edge of the sewer catch basin, and removing the sealing means from between the edges of the manhole and sewer catch basin.
Claims1
A process for supporting a manhole frame and obtaining a seal between a manhole frame and a sewer catch basin, comprising the steps of:
- a. positioning a manhole frame in a desired position relative to an opening in a sewer catch basin;
- b. placing a flexible, resilient, air tight expandable means within the interior opening of the manhole frame and catch basin opening against the inner surfaces of said manhole frame and said sewer catch basin opening;
- c. inflating said expandable means to expand said expandable means into contact with the inner surfaces of said manhole frame and said sewer catch basin opening
- d. placing sealing and supporting material around the exterior of said expandable means in sealing and supporting contact with said manhole frame and said sewer catch basin;
- and,
- e. removing said expandable means from the interior of said sealing and supporting material, said manhole frame, and said sewer catch basin.
Dependencies are inferred from the claim text.