US Patent Issued to HAMILTON SUNDSTRAND on Dec. 23 for "Recirculation ground maintenance mode" (Connecticut, Michigan Inventors)

ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,503,240, issued on Dec. 23, was assigned to HAMILTON SUNDSTRAND Corp. (Charlotte, N.C.).

"Recirculation ground maintenance mode" was invented by Brian R. Shea (Windsor, Conn.), Peter Zywiak (Avon, Conn.) and Luke Martin (South Lyon, Mich.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of operating an aircraft air conditioning system is includes delivering cabin air to a lower recirculation heat exchanger included in a lower cooling zone to generate lower cooled recirculated cabin air and delivering the cabin air to an upper recirculation heat exchanger included in an upper cooling zone to generate upper cooled recirculation air. The method furt...