Patents by Inventor Jack A. Wallace

Jack A. Wallace 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).

  • Telescoping wind turbine blade
    Patent number: 7632070
    Abstract: A wind turbine blade made of a fixed blade section with an integral mounting flange for attachment to a wind turbine hub. A moveable blade section is attached to the fixed blade section and is free to move in a longitudinal direction relative to the fixed blade section. A positioning device controllably positions the moveable blade section to vary the overall length of the blade. This allows the wind turbine's rotor diameter to be adjusted. The rotor diameter can be increased in order to provide high power output in low wind conditions and it can be decreased in order to minimize loads in high wind conditions.
    Type: Grant
    Filed: June 7, 2005
    Date of Patent: December 15, 2009
    Inventors: Mark H. Dawson, Jack A. Wallace
  • Telescoping wind turbine blade
    Patent number: 6902370
    Abstract: A wind turbine blade made of a fixed blade section with an integral mounting flange for attachment to a wind turbine hub. A moveable blade section is attached to the fixed blade section and is free to move in a longitudinal direction relative to the fixed blade section. A positioning device controllably positions the moveable blade section to vary the overall length of the blade. This allows the wind turbine's rotor diameter to be adjusted. The rotor diameter can be increased in order to provide high power output in low wind conditions and it can be decreased in order to minimize loads in high wind conditions.
    Type: Grant
    Filed: June 4, 2002
    Date of Patent: June 7, 2005
    Assignee: Energy Unlimited, Inc.
    Inventors: Mark H. Dawson, Jack A. Wallace
  • Telescoping wind turbine blade
    Publication number: 20030223868
    Abstract: A wind turbine blade made of a fixed blade section with an integral mounting flange for attachment to a wind turbine hub. A moveable blade section is attached to the fixed blade section and is free to move in a longitudinal direction relative to the fixed blade section. A positioning device controllably positions the moveable blade section to vary the overall length of the blade. This allows the wind turbine's rotor diameter to be adjusted. The rotor diameter can be increased in order to provide high power output in low wind conditions and it can be decreased in order to minimize loads in high wind conditions.
    Type: Application
    Filed: June 4, 2002
    Publication date: December 4, 2003
    Inventors: Mark H. Dawson, Jack A. Wallace