Patents by Inventor Dennis Alan Liljegren

Dennis Alan Liljegren 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).

  • Pitch control assembly for vertical axis wind turbine
    Patent number: 9297359
    Abstract: A pitch control assembly for a vertical axis wind turbine provides greater efficiency to the vertical axis wind turbine. The pitch control assembly comprises a pitch control assembly housing mechanically coupled to a first stop bar, a second stop bar and a cushion mass. The pitch control assembly housing is mechanically coupled to a pitch control assembly bottom plate where the pitch control assembly bottom plate is mechanically coupled to a dampening spring. The dampening spring is mechanically coupled to a blade control plate, where the blade control plate is mechanically coupled to a first blade control pusher bar, a second blade control pusher bar and a blade control plate stem. A heavier mass and a lighter mass rest upon the blade control plate; the blade control plate stem is mechanically coupled to a vertical axis, which is used in the vertical axis wind turbine.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: March 29, 2016
    Inventor: Dennis Alan Liljegren