Patents Assigned to Welding Controls Limited
  • Backing ring assembly for pipes
    Patent number: 3960311
    Abstract: A backing and alignment ring assembly for insertion in pipes, particularly for welding purposes, comprising a segmented backing ring and a pair of axially spaced hub members connected to the backing ring by radially and axially extending connecting means. When the hub members are drawn together the backing ring is caused to expand and engage with the pipe bore.
    Type: Grant
    Filed: November 25, 1974
    Date of Patent: June 1, 1976
    Assignee: Welding Controls Limited
    Inventor: Raymond Paul Griffiths