Patents by Inventor Duy N. Pham

Duy N. Pham 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).

  • Friction stir welded pipes
    Patent number: 9341287
    Abstract: Fluid conveying pipes and processes of forming such pipes using friction stir welding. The fluid conveying pipes are formed from a pipe section that includes a first barrel coaxially and concentrically disposed within a second barrel. The first barrel and the second barrel are each formed from one or more sections or plates where longitudinal extending facing edges of the plates are friction stir welded (FSW) together along a seam(s) that extends longitudinally from the first end to the second end thereof. A plurality of the pipe sections can be connected together end to end using circumferential FSW seams to form a pipe.
    Type: Grant
    Filed: February 24, 2014
    Date of Patent: May 17, 2016
    Assignee: Lockheed Martin Corporation
    Inventors: Michael R. Eller, Randy J. Brown, Duy N. Pham, Eugene C. Jansen, Trevor Owen, Kevin Miller
  • FRICTION STIR WELDED PIPES
    Publication number: 20150240970
    Abstract: Fluid conveying pipes and processes of forming such pipes using friction stir welding. The fluid conveying pipes are formed from a pipe section that includes a first barrel coaxially and concentrically disposed within a second barrel. The first barrel and the second barrel are each formed from one or more sections or plates where longitudinal extending facing edges of the plates are friction stir welded (FSW) together along a seam(s) that extends longitudinally from the first end to the second end thereof. A plurality of the pipe sections can be connected together end to end using circumferential FSW seams to form a pipe.
    Type: Application
    Filed: February 24, 2014
    Publication date: August 27, 2015
    Applicant: LOCKHEED MARTIN CORPORATION
    Inventors: Michael R. ELLER, Randy J. BROWN, Duy N. PHAM, Eugene C. JANSEN, Trevor OWEN, Kevin MILLER
  • Friction-stir weld-tool and method
    Patent number: 8439250
    Abstract: A method for joining a tube and tube plate for use in a tube-and-shell heat exchanger is disclosed. The method enables a joint between the tube and tube plate that is substantially hermetic and substantially corrosion-resistant. The method comprises providing an anvil inside the tube, wherein the anvil supports the tube wall during a friction-stir welding process used to join the tube and tube plate. The anvil facilitates formation of a reliable weld region and enables faster friction-stir welding.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: May 14, 2013
    Assignee: Lockheed Martin Corporation
    Inventors: Riki P. Takeshita, Randy J. Brown, Michael R. Eller, Duy N. Pham
  • Friction-stir Weld-tool and Method
    Publication number: 20110000952
    Abstract: A method for joining a tube and tube plate for use in a tube-and-shell heat exchanger is disclosed. The method enables a joint between the tube and tube plate that is substantially hermetic and substantially corrosion-resistant. The method comprises providing an anvil inside the tube, wherein the anvil supports the tube wall during a friction-stir welding process used to join the tube and tube plate. The anvil facilitates formation of a reliable weld region and enables faster friction-stir welding.
    Type: Application
    Filed: July 1, 2010
    Publication date: January 6, 2011
    Applicant: LOCKHEED MARTIN CORPORATION
    Inventors: Riki P. Takeshita, Randy J. Brown, Michael R. Eller, Duy N. Pham