ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,486,776, issued on Dec. 2, was assigned to SAFRAN AIRCRAFT ENGINES (Paris).

"Turbine rotor comprising a blade stop ring configured to aid the cooling of the blade roots" was invented by Patrick Jean Laurent Sultana (Moissy-Cramayel, France), Matthieu Simon (Moissy-Cramayel, France), Loic Ansart (Moissy-Cramayel, France) and Joao Antonio Amorim (Moissy-Cramayel, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a turbine rotor (1) comprising a rotor disc (2), provided at its periphery with a plurality of axial cells (23) for receiving a bilobed root (30) of a blade (3), each cell (23) comprising a radially inner cavity...