Patents by Inventor Helmut Schriefl

Helmut Schriefl 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).

  • Switchgear cabinet comprising a door for an electric switching installation
    Publication number: 20040156167
    Abstract: To permit the locking of a displaceable door (1), comprising a door frame (2, 3, 4, 5, 6), which gives the door mechanical stability and a door leaf (3), which is attached to the door frame (2, 3, 4, 5, 6), the door leaf (8) is configured so that it can be displaced in relation to the door frame (2, 3, 4, 5, 6). The door leaf (8) is allocated first locking elements (12a, b), which can be locked and unlocked with second locking elements (12c, d) that are allocated to the switchgear cabinet frame by the displacement of the door leaf (8).
    Type: Application
    Filed: December 5, 2003
    Publication date: August 12, 2004
    Inventors: Volker Kopke, Stefan Lebek, Gildo Mahn, Helmut Schriefl, Brunhilde Wenge