Patents Assigned to Superior Door Corporation
  • Self-closing door hinge
    Patent number: 4406034
    Abstract: A self-closing door hinge for a curtain door mounted within a frame consisting of a channel having a double helical track and a roller on said helical track which is returned to a pre-selected position after movement in either direction by compression of a spring thereby moving an arm carrying a curtain door connected to said channel to a preselected position.
    Type: Grant
    Filed: July 21, 1981
    Date of Patent: September 27, 1983
    Assignee: Superior Door Corporation
    Inventor: Elmer A. Lindemann