Patents by Inventor James R. Darling

James R. Darling 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).

  • Patent number: 5105524
    Abstract: A method for flaring pipe liners. The method includes pushing against the end of a thermoplastic liner installed in a metal pipe with a first forming head and applying heat to cause said head to flare outwardly about an acute angle; and subsequently pushing against said end with a second forming head and applying heat to cause said end to bend into contact with said flange.
    Type: Grant
    Filed: August 16, 1990
    Date of Patent: April 21, 1992
    Assignee: Du Pont Canada Inc.
    Inventor: James R. Darling
  • Patent number: 4968241
    Abstract: An apparatus for flaring the end of a thermoplastic liner installed in a metal pipe. The end extends beyond the pipe and the pipe having at least one flange mounted thereon. The apparatus includes a first forming head having a liner contacting surface disposed at an acute angle relative to said liner, said surface being adapted to be pushed against said end to cause said end to flare outwardly about an acute angle and a second forming head having a liner contacting surface being disposed at an angle of at least ninety degrees relative to said liner. The second forming head is adapted to be pushed against said end to cause said end to bend into contact with said flange.
    Type: Grant
    Filed: May 2, 1989
    Date of Patent: November 6, 1990
    Assignee: Du Pont Canada Inc.
    Inventor: James R. Darling