Patents by Inventor Douglas Ronald Warren

Douglas Ronald Warren has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • System and method for repairing an underground pipeline
    Patent number: 11391406
    Abstract: A system for repairing an underground pipeline using a light source. A resin soaked tubular liner is inverted within an underground liner. A tubular bladder is subsequently inflated within the tubular liner. A pull line is attached to a free end of the bladder. The light source is attached to the pull line. The bladder pulls with the pull line and light source into the liner as the bladder is inverted within the liner. The light source is subsequently activated and separated from the pull line. The light source is then pulled through the bladder and liner, curing the liner as it moves.
    Type: Grant
    Filed: November 11, 2020
    Date of Patent: July 19, 2022
    Assignees: The Charles Machine Works, Inc.
    Inventors: Peder Dahl-Nielsen, Per Lundgren, Cory J. Steckmann, Aidan F. Kelly, Douglas Ronald Warren
  • System And Method For Repairing An Underground Pipeline
    Publication number: 20210172556
    Abstract: A system for repairing an underground pipeline using a light source. A resin soaked tubular liner is inverted within an underground liner. A tubular bladder is subsequently inflated within the tubular liner. A pull line is attached to a free end of the bladder. The light source is attached to the pull line. The bladder pulls with the pull line and light source into the liner as the bladder is inverted within the liner. The light source is subsequently activated and separated from the pull line. The light source is then pulled through the bladder and liner, curing the liner as it moves.
    Type: Application
    Filed: November 11, 2020
    Publication date: June 10, 2021
    Inventors: Peder Dahl-Nielsen, Per Lundgren, Cory J. Steckmann, Aidan F. Kelly, Douglas Ronald Warren