×

DRIVE APPARATUS FOR INSTALLING FLEXIBLE PIPE THROUGH IN-SITU PIPE

  • US 20090134554A1
  • Filed: 08/01/2008
  • Published: 05/28/2009
  • Est. Priority Date: 11/23/2007
  • Status: Abandoned Application
First Claim
Patent Images

1. Apparatus for inserting a flexible liner into the bore of an existing in-situ pipe, the apparatus comprising:

  • a drive for pushing a flexible liner in the bore of the in-situ pipe, the drive having at least a first pair of contra-rotating resilient liner-engaging drive members having a nip formed therebetween through which the flexible liner is frictionally driven;

    a drive motor connected to drive at least one of the first pair of contra-rotating drive members;

    a guide tube extending between the drive and the bore of the in-situ pipe, and sealed thereto, for guiding the liner into the bore of the in-situ pipe;

    a pull head, which is sealable to the in-situ pipe, and secured to a leading end of the flexible liner;

    a liner seal for sealing about the flexible liner in the guide tube; and

    a fluid port for introduction of fluid intermediate the pull head and the liner seal for hydraulically urging the pull head along the in-situ pipe and pulling the flexible pipe therewith while the drive members push the flexible pipe.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×