ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,480,439, issued on Nov. 25, was assigned to UMU DEVISING LLC (Tochigi, Japan).
"Opposed-piston internal combustion engine" was invented by Eiji Sakaguchi (Tochigi, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "In an opposed-piston mechanism, an intake compression cylinder and an expansion exhaust cylinder are individually provided, and a rotating perforated columnar valve and an ignition combustion chamber are formed therebetween. A valve mechanism is arranged on a cylinder side surface side, and a disk cam that moves in conjunction with crank rotation operates an intake valve and an exhaust valve on a cylinder side surface via a movable fulcrum ...