Abstract: The lining of lateral pipelines is effected from the service end by inserting a resin impregnated lining tube into the lateral using a push rod. The leading end of the push rod is attached to the liner by a relaeasble device so that once the liner is in place, and the rod pulled back, the liner detaches and remains in the lateral. The liner is held in folded state by straps which are broken as the rod is pulled back in that a rope attached to the leading end of the rod is trapped under the straps and breaks them one by one as the rod is retracted.
Type:
Grant
Filed:
July 27, 1998
Date of Patent:
November 14, 2000
Assignee:
Insituform
Inventors:
Eric Wood, deceased, by Miranda Jane Bull, legal representative, by William A. Martin, legal representative