MULTIPLE CONDUIT-REPAIR METHOD

• US 20080223469A1
• Filed: 08/30/2007
• Published: 09/18/2008
• Est. Priority Date: 03/13/2007
• Status: Abandoned Application

• Current Assignee: Hillel David Renassia
• Original Assignee: Hillel David Renassia
• Inventors: Renassia, Hillel David
• Application Number:
  US11/847,347
• Publication Number:
  US 20080223469A1
• Time in Patent Office: Days
• US Class Current: 138/98
• CPC Class Codes: F16L 55/163 a ring, a band or a sleeve being pressed against the inner surface of the pipe
• CPC Class Codes: F16L 55/1652 the flexible liner being pulled into the damaged section
• CPC Class Codes: F16L 55/1654 and being inflated

Abstract

A method for repairing multiple conduits using a vacuum collapsed, elastic liner involves providing a quantity sufficient for multiple repairs to the work sight and inserting a length into the damaged conduit. The protruding liner is then heat-sealed to prevent volume flow between the inserted liner and the remaining liner. The inserted liner vacuum is broken enabling the inserted liner to reassume its original size and shape. In doing so the expanded liner seals the problematic breeches. A retaining sleeve is then inserted in the expanded liner to hold it in place.

Claims

1. A method for repairing damaged conduits comprising:

(a) providing a stored length of elastic, vacuum-collapsed liner, said vacuum-collapsed liner having a collapsed-state shape, and being biased towards an open shape on release of the vacuum,

(b) inserting a first length of said liner through a portion of damaged conduit for a first repair,

(c) sealing said liner to prevent flow between an inner volume of said first length and an inner volume of a remaining part of said liner, and

(d) breaking said vacuum of said inner volume of said first length of liner inserted in said damaged conduit so that said inserted liner attempts to reassume open shape and said remaining liner remains in its said collapsed state.

2. The method of claim 1, wherein said collapsed-state shape is a four-lobed shape.

3. The method of claim 1, wherein said vacuum collapsed liner is provided on a reel.

4. The method of claim 1, wherein said sealing is heat fusing.

5. The method of claim 1, further comprising inserting into said inserted liner a sleeve element configured to press said liner against said conduit.