Patents by Inventor Dan Pendergrass

Dan Pendergrass 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).

  • Pressure and vacuum assisted vertical axis wind turbines
    Patent number: 10487799
    Abstract: A system and apparatus for wind energy conversion comprising a Savonius style rotor attached to a drive shaft; a first airfoil configured to block air pressure along a return side of the rotor; an airfoil cowling configured to direct blocked air on the return side of the rotor to intersect with air on the drive side of the rotor; at least one vacuum compensator configured on a top edge of the first airfoil wherein the at least one vacuum compensator redirects the blocked air on the return side of the rotor onto the driven side of the rotor; an anemometer; a wind direction indicator; and a computer system operatively connected to the roller and track assembly wherein the computer system adjusts the orientation of the rotor according to a wind speed measured by the anemometer and a wind direction measured by the wind direction indicator.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: November 26, 2019
    Inventor: Dan Pendergrass
  • PRESSURE AND VACUUM ASSISTED VERTICAL AXIS WIND TURBINES
    Publication number: 20170175706
    Abstract: A system and apparatus for wind energy conversion comprising a Savonius style rotor attached to a drive shaft; a first airfoil configured to block air pressure along a return side of the rotor; an airfoil cowling configured to direct blocked air on the return side of the rotor to intersect with air on the drive side of the rotor; at least one vacuum compensator configured on a top edge of the first airfoil wherein the at least one vacuum compensator redirects the blocked air on the return side of the rotor onto the driven side of the rotor; an anemometer; a wind direction indicator; and a computer system operatively connected to the roller and track assembly wherein the computer system adjusts the orientation of the rotor according to a wind speed measured by the anemometer and a wind direction measured by the wind direction indicator.
    Type: Application
    Filed: December 12, 2016
    Publication date: June 22, 2017
    Inventor: Dan Pendergrass