ALEXANDRIA, Va., April 15 -- United States Patent no. 12,601,272, issued on April 14, was assigned to SAFRAN AIRCRAFT ENGINES (Paris).

"Pitch change mechanism with an actuator surrounding a fluid transfer bearing" was invented by Christophe Marcel Lucien Perdrigeon (Moissy-Cramayel, France), Clement Cottet (Moissy-Cramayel, France), Jean Charles Olivier Roda (Moissy-Cramayel, France) and Regis Eugene Henri Servant (Moissy-Cramayel, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a pitch change mechanism (70) comprising a frame (72), an actuating cylinder (74) having a moving part (102) capable of translating relative to the frame (72), and a linkage system (78) connecting the m...