Method and means for repairing existing manhole
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United States of America Patent
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May 21, 1991
Issued Date -
N/A
app pub date -
Sep 27, 1990
filing date -
Sep 2, 1988
priority date (Note) -
Expired
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Abstract
A form assembly for casting a lining wall in an existing manhole includes a cylindrical lower form assembly, a circular horizontal form assembly, and a cylindrical upper form assembly. All three assemblies are formed of smaller segments which are assembled together within the manhole and which can be disassembled after the manhole has been repaired.
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