Patent ID: 8869839
Filing Date: 2014-10-28
Classification: F16L

Abstract:
1. A method of repairing a junction of a main line pipe and a lateral pipe, comprising: providing a repair device comprising a repair train having a first end and a second end, at least one wall disposed between the first end and second end, an interior lumen defined by the at least one wall and the first end and second end, and an opening in the at least one wall disposed between the first end and second end; positioning a main bladder on the exterior of the at least one wall of the repair train, wherein the main bladder has a first end and a second end, and a lateral bladder opening disposed between the first end and second end; positioning a lateral bladder at least partially in the interior of the repair train and adjacent to the lateral bladder opening, wherein the lateral bladder has a first end and a second end, and wherein the first end being open and attached to the repair train to provide fluid independence from the main bladder; connecting a first end of a lateral bladder tube inflation tube having a first end and a second end of the lateral bladder, wherein the first end is in fluid communication with the lateral bladder; connecting a first end of a main bladder inflation tube having a first end and a second end to the main bladder, wherein the first end is in fluid communication with the main bladder; inserting a repair liner through the lateral bladder opening and into the lumen of the lateral bladder; positioning the repair train at a damaged pipe location; applying air through the main bladder inflation tube and subsequently the lateral bladder inflation tube to inflate the main bladder tube independently of the lateral bladder tube; applying air through the lateral bladder inflation tube and subsequently the main bladder inflation tube, or applying air concurrently through the main bladder inflation tube and the lateral bladder inflation tube to inflate the lateral bladder; allowing the resin to cure; and removing the repair train and bladders.