Patents by Inventor Joel E. Parker

Joel E. Parker 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 shutdown system
    Patent number: 4815936
    Abstract: According to the invention, a wind turbine 10 incorporates a wind vane 105 which mechanically controls a valve 100 that directs the output of a turbine driven hydraulic pump 75 to yaw the turbine out of the wind upon a loss of system power or load. The turbine yaws out of the wind at an angular rate that is roughly proportional to rotor speed so that excessive teeter amplitudes are not encountered. The mechanically driven pump advantageously provides power to yaw the rotor out of the wind even if all electrical power is lost.
    Type: Grant
    Filed: July 5, 1988
    Date of Patent: March 28, 1989
    Assignee: United Technologies Corporation
    Inventors: Christopher L. Stoltze, Joel E. Parker