US Patent Issued to SAFRAN HELICOPTER ENGINES on Jan. 28 for "Propulsion unit with foldable propeller blades and method for stopping the propeller in an indexed angular position" (French Inventors)

ALEXANDRIA, Va., Jan. 29 -- United States Patent no. 12,208,911, issued on Jan. 28, was assigned to SAFRAN HELICOPTER ENGINES (Bordes, France).

"Propulsion unit with foldable propeller blades and method for stopping the propeller in an indexed angular position" was invented by Jean-Louis Robert Guy Besse (Moissy-Cramayel, France) and Camel Serghine (Moissy-Cramayel, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "A propulsion unit having a propeller for an aircraft including a nacelle; a propeller mounted in the nacelle so as to be capable of rotating about a longitudinal axis of rotation, the propeller having blades mounted by a root so as to be capable of pivoting between a deployed position, in whic...