Patents Assigned to WPW, LLC
  • Patent number: 8561646
    Abstract: Embodiments of the present invention include a system for locating and restoring service lines during pipeline restoration. According to some embodiments of the present invention, a system for service line plug transport and dispensing includes at least one magazine tray including a plurality of service line plugs and a plug advancement mechanism for pushing at least one of the plurality of service line plugs off of the magazine tray and onto an applicator fitting. According to embodiments of the present invention, the applicator fitting includes a magnet configured to interact with a magnet inside the at least one of the plurality of service line plugs.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: October 22, 2013
    Assignee: WPW, LLC
    Inventor: John A. Cain
  • Patent number: 8461473
    Abstract: A method for establishing or restoring electrical continuity between metal pipe sections in pipeline rehabilitation according to embodiments of the present invention includes, from an inside of a pipe having first and second pipe sections, removing a layer of the first pipe section at a first location, removing a layer of the second pipe section at a second location, electrically connecting a spanner at the first location and the second location, deploying a tubular liner along the inside of the pipe, injecting grout between the tubular liner and the inside of the pipe, and distributing the grout between the tubular liner and the inside of the pipe, wherein a first radial distance from the inside of the pipe to the innermost extent of the spanner is less than or equal to a second radial distance from the inside of the pipe to the tubular liner.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: June 11, 2013
    Assignee: WPW, LLC
    Inventor: Harry L. Baum
  • Patent number: 7841366
    Abstract: Embodiments of methods for pipeline rehabilitation include deploying a tubular liner along an inside of a pipeline, deflating the tubular liner to form a trough, and injecting grout into the pipeline by injecting grout into the trough. Other embodiments include deploying a tubular liner along an inside of a pipeline, inserting a first swab into the front end of the pipeline, the first swab having a core hole, placing the tubular liner through the core hole, injecting grout into the pipeline between the tubular liner and the inside of the pipeline, and advancing a second swab through the tubular liner to distribute the grout between the tubular liner and the pipeline and to advance the first swab ahead of the second swab from the front end to the back end of the pipeline.
    Type: Grant
    Filed: August 21, 2007
    Date of Patent: November 30, 2010
    Assignee: WPW, LLC
    Inventors: Corwin J. Bryant, John A. Cain, Ralph K. Cordonnier, James D. Keigley, Dan Cohen