ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,553,672, issued on Feb. 17.
"Spray-actuated heat engine" was invented by Brent R. Cottingham (Grand Rapids, Mich.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A spray-actuated heat engine comprises an expandable volume chamber containing an operating fluid in gas form, a reservoir holding a heat transfer fluid in liquid form, a pump that pumps the heat transfer fluid from the reservoir to the chamber, and a piping system through which the heat transfer fluid is configured to flow. The piping system is in fluid communication with a heat source for heating the heat transfer fluid to obtain a high temperature and is in fluid communication with a cold sou...