Patents by Inventor Gunter Speckhofer

Gunter Speckhofer 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).

  • Puffer type circuit breaker with arcing chamber, auxiliary shunting contacts and exhaust structure with pressure relief valves
    Patent number: 6163001
    Abstract: Arranged in the continuation of an arcing chamber (16) bounded by consumable rings (32a, 32b) are pressure chambers (25a, 25b) which are connected in each case to a heating volume (18), which concentrically surrounds the arcing chamber (16), via a return channel (28; 28b), which is rotationally symmetrical with reference to the switching axis and is at least initially of increasing cross section, and a non-return valve (29a; 29b). A circumferential blowout slot (19) opening into the arcing chamber (16) between the consumable rings (32a, 32b) issues from the heating volume (18). The pressure chambers (25a, 25b) are, moreover, connected via in each case a plurality of exhaust tubes (34a, 34b) to exhaust volumes (30a, 30b) and to one of them also via a pressure relief valve (37).
    Type: Grant
    Filed: April 13, 1999
    Date of Patent: December 19, 2000
    Assignee: ABB Research Ltd.
    Inventors: Lukas Zehnder, Kurt Kaltenegger, Lutz Niemeyer, Thomas Schoenemann, Gunter Speckhofer