Annular Seam Patents (Class 228/168)
Having u-shaped or curved cross section (Class 228/169)
  • Apparatus and method for aligning and welding tubular metal components together
    Patent number: 4084739
    Abstract: An apparatus and method for concentrically and radially aligning and welding together two tubular metal components, such as a metal pipe or tubing, and a tubular flanged member, or two or more metal pipes or tubings.
    Type: Grant
    Filed: February 28, 1977
    Date of Patent: April 18, 1978
    Assignee: Wisconsin Centrifugal, Inc.
    Inventors: Lawrence D. Koltz, Herbert E. Pritzlaff