Patents Assigned to Tenneco Inc.
  • Welding process
    Patent number: 3944775
    Abstract: An internal spreader bar provides control of the convergence point and convergence angle of opposite electrically heated edges of a skelp during a tube seam welding operation and other controls are practiced to increase weld pressure at the faying surfaces.
    Type: Grant
    Filed: December 11, 1972
    Date of Patent: March 16, 1976
    Assignee: Tenneco Inc.
    Inventor: Donald P. Worden