Patents by Inventor Hans Biberger

Hans Biberger 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).

  • Blade arrangement for a motor driven sickle or rotary mowing machines, and such machines
    Patent number: 4161096
    Abstract: The disclosure embraces an improved blade arrangement for a power mower which includes four blade arms mounted on a shaft together with a curved plate which is mounted on the same shaft a selected perpendicular distance from the blades; air deflection surfaces are provided both on the trailing edge of each of the blades as well as on the plate so that, when in use, the resulting noise produced by the rotating blades will be reduced.
    Type: Grant
    Filed: November 22, 1976
    Date of Patent: July 17, 1979
    Inventor: Hans Biberger