Apparatus and method to repair the junction of a sewer main line and lateral pipe
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United States of America Patent
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Jun 16, 2020
Grant Date -
Mar 22, 2018
app pub date -
Nov 29, 2017
filing date -
Feb 22, 2010
priority date (Note) -
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Abstract
A liner assembly and method for lining a damaged pipe junction between a main and lateral pipe is provided. The liner assembly includes a main liner member and a lateral liner tube. A collar disposed near the juncture between the main liner member and lateral liner tube is impregnated with a liquid hydrophobic or hydrophilic material capable of curing in a flexible or rigid state with the material expanding in the presence of water. The hydrophobic or hydrophilic material can also be applied without the use of the collar. When the liner assembly is pressed against the main and lateral pipes, a portion of the hydrophilic or hydrophobic material is forced into the damaged pipe junction.
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