Patents by Inventor Alexander S. Harvey

Alexander S. Harvey 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).

  • Wind turbine with hydraulic transmission
    Patent number: 7418820
    Abstract: A wind turbine includes a closed loop hydrostatic transmission. The rotor is directly coupled to a low-speed high torque hydraulic motor, which is pressure-reversible to act as a pump. A variable displacement, pressure compensated hydrostatic transmission receives the hydraulic fluid output and drives a generator. The hydrostatic transmission and the generator may be compactly located in the nacelle of wind turbine tower.
    Type: Grant
    Filed: May 16, 2003
    Date of Patent: September 2, 2008
    Assignee: MHL Global Corporation Inc.
    Inventors: Alexander S. Harvey, David McConnell