Patents by Inventor Herbert Perfahl

Herbert Perfahl 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).

  • Cycloidal propeller having blades which may be set into a sailing position
    Patent number: 6065935
    Abstract: The invention provides for a cycloidal propeller, in strictly rudder operation, accessory apparatuses that mesh with a gear drive connected to a shaft of the respective wing. The invention accomplishes relatively small actuation movements of the accessory apparatuses, sufficient to achieve a large pivoting movement of the wings, so that the wings can be adjusted over large angles without impediment. Therefore, wings having normal profiles may be utilized.
    Type: Grant
    Filed: September 16, 1997
    Date of Patent: May 23, 2000
    Assignee: Voith Hydro GmbH & Co. KG
    Inventor: Herbert Perfahl
  • Cycloidal propeller having wings operated by hydraulic clutches
    Patent number: 5993157
    Abstract: A cycloidal propeller to achieve strictly a rudder operation includes accessory apparatuses containing accessory drives. Clutches are used to couple the accessory drives to the propeller shafts, and additional clutches are provided to disengage the fixed connection of the normal propeller mechanism to the wing shafts in cruising operation.
    Type: Grant
    Filed: September 15, 1997
    Date of Patent: November 30, 1999
    Assignee: Voith Hydro GmbH & Co. KG
    Inventor: Herbert Perfahl