ALEXANDRIA, Va., Feb. 5 -- United States Patent no. 12,215,590, issued on Feb. 4, was assigned to Pratt & Whitney Canada Corp. (Longueuil, Canada).
"Method for checking bleed-off valve closing point" was invented by Louis Duranleau-Hendrickx (Montreal).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for checking a closing point for a bleed-off valve for a gas turbine engine includes determining a modulation characteristic curve for the bleed-off valve, determining a nominal closing point value for the bleed-off valve on the modulation characteristic curve, operating the gas turbine engine and increasing an engine power of the gas turbine engine until the gas turbine engine parameter reaches a predeter...