Patents by Inventor Luise Stephani

Luise Stephani 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).

  • Portable handheld motor tool having a one-piece fan housing
    Patent number: 4970993
    Abstract: The invention relates air-cooled combustion engine powered handheld tool. A fan screen has radial struts and tranverse walls which together define windows. The effective intake suction area of the fan is less than the area of the screen. Wood chips and the like are kept out by the size of the windows and the reduced air flow velocity through the screen.
    Type: Grant
    Filed: March 15, 1990
    Date of Patent: November 20, 1990
    Assignee: Andreas Stihl
    Inventors: Hermann Weiss, Siegfried Frank, Wolfgang Kirtz, Luise Stephani