Patents by Inventor Helmut Loisel

Helmut Loisel 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).

  • Container-type switchgear
    Patent number: 5878905
    Abstract: Switchgear, such as gas-insulated, metal-encapsulated high-voltage switchgear, is accommodated in a container. The container has a side wall formed with an opening. An outwardly opening flap closes the opening in the normal situation. Upon a sudden pressure increase in the container, caused for instance by arcing, the flap is automatically opened and the container is vented. A linkage with a damper is connected to the flap for damping a motion of the flap into the open position.
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: March 9, 1999
    Assignee: ABB Patent GmbH
    Inventors: Peter Gronbach, Friedrich Kraus, Thomas Gfollner, Helmut Loisel, Karl Purethmair