Patents by Inventor Frank Kretschmann

Frank Kretschmann 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).

  • Drive system for a wind turbine
    Patent number: 9051922
    Abstract: A drive system having an integrated transmission and motor/generator unit for a wind turbine includes a transmission output shaft designed as a hollow shaft, which receives a sun shaft of an output-side planetary gear stage and is connected thereto. The transmission output shaft comprises a transmission-side end section of an insert shaft which is concentrically arranged within a rotor hollow shaft. The transmission output shaft additionally has a bearing for receiving radial and axial forces. The motor/generator unit has two dedicated bearings. One bearing thereof is a transmission-side bearing. In addition, a rear-side generator bearing is provided.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: June 9, 2015
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Alfons Böing, Ralf Martin Dinter, Jürgen Draber, Arno Klein-Hitpass, Frank Kretschmann, Jan-Dirk Reimers, Friedrich Schöberl, Roland Zeichfüssl
  • DRIVE SYSTEM FOR A WIND TURBINE
    Publication number: 20140302957
    Abstract: A drive system having an integrated transmission and motor/generator unit for a wind turbine includes a transmission output shaft designed as a hollow shaft, which receives a sun shaft of an output-side planetary gear stage and is connected thereto. The transmission output shaft comprises a transmission-side end section of an insert shaft which is concentrically arranged within a rotor hollow shaft. The transmission output shaft additionally has a bearing for receiving radial and axial forces. The motor/generator unit has two dedicated bearings. One bearing thereof is a transmission-side bearing. In addition, a rear-side generator bearing is provided.
    Type: Application
    Filed: August 30, 2012
    Publication date: October 9, 2014
    Applicant: Siemens Aktiengesellschaft
    Inventors: Alfons Böing, Ralf Martin Dinter, Jürgen Draber, Arno Klein-Hitpass, Frank Kretschmann, Jan-Dirk Reimers, Friedrich Schöberl, Roland Zeichfüssl