Patents by Inventor Holger Grünwaldt

Holger Grünwaldt 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).

  • Lubrication heating system and wind turbine incorporating same
    Patent number: 7997855
    Abstract: A wind turbine is provided having a gearbox containing a lubrication medium, a pump for circulating the lubrication medium, and a gearbox lubrication suction pipe for transporting the lubrication medium from the gearbox to the pump. A heater is in thermal connection to, at least a portion of, the gearbox lubrication suction pipe. This heater is used to heat the lubrication medium contained within the gearbox lubrication suction pipe to a temperature where damage to the pump is avoided.
    Type: Grant
    Filed: January 29, 2008
    Date of Patent: August 16, 2011
    Assignee: General Electric Company
    Inventors: Bharat S. Bagepalli, Edwin Hidding, Stephan Klümper, Eric A. Baker, Holger Grünwaldt, Michael J. Burkett