Patents by Inventor Engelbert Frank

Engelbert Frank 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).

  • Rotary vane drive with rotating cylinder
    Patent number: 4175393
    Abstract: A drive apparatus incorporating a rotor rotatably received within the hollow interior of a cylindrical box which is in turn rotatably received within a cylindrical chamber defined within a casing. The rotor is eccentrically positioned within the concentric box and chamber with the rotor including a plurality of selectively extensible and retractable segments for selective engagement with the interior of the cylindrical box upon a rotational driving of the rotor in response to the introduction of pressurized fluid.
    Type: Grant
    Filed: January 27, 1978
    Date of Patent: November 27, 1979
    Inventor: Engelbert Frank