Patents by Inventor Donald Borthwick

Donald Borthwick 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).

  • Turbine blade
    Patent number: 7794202
    Abstract: A turbine blade is provided, comprising a stator-side end located toward a stationary stator cylinder of the turbine, a rotor-side end located toward an axial rotor of the turbine, a leading edge located between the stator-side end and the rotor-side end, a trailing edge located between the stator-side end and the rotor-side end and located down-stream of the leading edge with respect to a fluid flow direction, wherein the rotor-side and stator-side ends have a negative sweep angle as measured between the instantaneous tangent of the blade surface and the fluid flow direction.
    Type: Grant
    Filed: June 18, 2004
    Date of Patent: September 14, 2010
    Assignee: Siemens Aktiengesellschaft
    Inventors: Donald Borthwick, Shun Chen, Heinrich Stüer, Frank Truckenmüller
  • Turbine blade
    Publication number: 20070071606
    Abstract: A turbine blade is provided, comprising a stator-side end located toward a stationary stator cylinder of the turbine, a rotor-side end located toward an axial rotor of the turbine, a leading edge located between the stator-side end and the rotor-side end, a trailing edge located between the stator-side end and the rotor-side end and located down-stream of the leading edge with respect to a fluid flow direction, wherein the rotor-side and stator-side ends have a negative sweep angle as measured between the instantaneous tangent of the blade surface and the fluid flow direction.
    Type: Application
    Filed: June 18, 2004
    Publication date: March 29, 2007
    Inventors: Donald Borthwick, Shun Chen, Heinrich Stuer, Frank Truckenmuller