Patents by Inventor Tor Dahl

Tor Dahl 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).

  • Apparatus for bending structural metal rails
    Patent number: 4754632
    Abstract: The invention relates to an apparatus for bending structural metal rails, preferably rails for multi-glazed windows, and gives instructions for a bending unit (20) having two wringing heads (6) which can be displaced relative to the width of the rail, for in an open position to allow the infeed of rails (5) having various width, and in an attracted position to clamp a portion of the rail (5) for the bending thereof by turning the wringing heads (6).
    Type: Grant
    Filed: March 30, 1987
    Date of Patent: July 5, 1988
    Assignee: Rjukan Metall A/S
    Inventor: Tor Dahl