ALEXANDRIA, Va., March 26 -- United States Patent no. 12,258,934, issued on March 25.
"Open and closed cycle lift force turbines" was invented by Orville J. Birkestrand (Davenport, Iowa).
According to the abstract* released by the U.S. Patent & Trademark Office: "Open and closed cycle lift force turbines are provided. Illustratively, the open cycle lift force turbine operates in an open cycle environment without heat and/or pressure, utilizing asymmetric pressure distribution on lift turbine blades mainly to generate thrust with the normal component of this lift force, while using the tangential component of this lift force to drive a bypass fan providing additional thrust and to drive accessories, provide control to the fluid velocity, a...