Patents Assigned to Duratron Systems Limited
  • Patent number: 5078430
    Abstract: A method is disclosed for relining buried pipeline with interconnectable plastic type pipe sections. The method comprises gaining access to an open end of the buried pipeline, such as through a manhole, passing pipe sections down the manhole and inserting individually each pipe section into the buried pipeline open end. Each pipe section is of a length to permit, within the confines of the manhole, insertion of each pipe section into the pipeline open end. Each pipe is of a diameter to fit within the pipeline. The pipe section to be inserted is interconnected to the pipe section already inserted within the buried pipeline. Such interconnected sections are sequentially moved into the buried pipeline to permit insertion of the next pipe section into buried pipeline until the entire length of the pipeline to the next access area has been relined.
    Type: Grant
    Filed: July 16, 1990
    Date of Patent: January 7, 1992
    Assignee: Duratron Systems Limited
    Inventor: Henri S. St. Onge
  • Patent number: 4958959
    Abstract: A method is disclosed for relining buried pipeline with interconnectable plastic type pipe sections. The method comprises gaining access to an open end of the buried pipeline, such as through a manhole, passing pipe sections down the manhole and inserting individually each pipe section into the buried pipeline open end. Each pipe section is of a length to permit, within the confines of the manhole, insertion of each pipe section into the pipeline open end. Each pipe is of a diameter to fit within the pipeline. The pipe section to be inserted is interconnected to the pipe section already inserted within the buried pipeline. Such interconnected sections are sequentially moved into the buried pipeline to permit insertion of the next pipe section into buried pipeline until the entire length of the pipeline to the next access area has been relined.
    Type: Grant
    Filed: January 9, 1989
    Date of Patent: September 25, 1990
    Assignee: Duratron Systems Limited
    Inventor: Henri S. St. Onge
  • Patent number: 4796669
    Abstract: A method is disclosed for relining buried pipeline with interconnectable plastic type pipe sections. The method comprises gaining acess to an open end of the buried pipeline, such as through a manhole, passing pipe sections down the manhole and inserting individually each pipe section into the buried pipeline open end. Each pipe section is of a length to permit, within the confines of the manhole, insertion of each pipe section into the pipeline open end. Each pipe is of a diameter to fit within the pipeline. The pipe section to be inserted is interconnected to the pipe section already inserted within the buried pipeline. Such interconnected sections are sequentially moved into the buried pipeline to permit insertion of the next pipe section into buried pipeline until the entire length of the pipeline to the next access area has been relined.
    Type: Grant
    Filed: January 13, 1986
    Date of Patent: January 10, 1989
    Assignee: Duratron Systems Limited
    Inventor: Henri S. St. Onge