ALEXANDRIA, Va., March 26 -- United States Patent no. 12,259,053, issued on March 25, was assigned to SANKEI GIKEN KOGYO Co. LTD. (Tokyo).
"Exhaust valve" was invented by Tetsuaki Nomura (Isesaki, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An exhaust valve includes a pipe body connecting an upstream pipe and a downstream pipe for exhaust, a valve plate disposed inside the pipe body in a state of being attached to a rotary shaft that rotates by drive of an actuator, the valve plate configured to rotate to open/close an exhaust flow path inside the pipe body, and a stopper fixed inside the pipe body and configured to come into contact with the valve plate in a closed state. In the stopper, at least o...