ALEXANDRIA, Va., June 12 -- United States Patent no. 12,297,769, issued on May 13.
"Rotary engine" was invented by Richard Baron (St. Paul, Minn.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A rotary engine comprised of a pair of counterrotating rotors within a non-rotating outer housing. Each of the rotors is coupled to a common power shaft, one directly and the other through a reversing gear arrangement. Both are driven by the hyper-expansion of combustion gases in a repeating combustion cycle. Each has a generally circular, nearly frictionless working surface perpendicular to the power shaft axis. Each rotor surface defines chambers which rotate past each other. Within such chambers, compressed air and ...