ALEXANDRIA, Va., March 24 -- United States Patent no. 12,584,454, issued on March 24.

"Single cylinder internally heated stirling engine" was invented by Shufeng Fang (Tianjin, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present application relates to a single cylinder internally heated Stirling engine, comprising: a cylinder assembly comprising a hot side cylinder and a cold side cylinder, which are joined together to form a closed single cylinder, and a heat insulation ring is provided between them; a first heat exchanger arranged inside the hot side cylinder and in fluid communication with an external heat source, used to heat the working gas in the hot side cylinder; a second heat exchanger ...