ALEXANDRIA, Va., June 9 -- United States Patent no. 12,286,894, issued on April 29, was assigned to PRATT & WHITNEY CANADA CORP. (Longueuil, Canada).

"Aircraft engine rotor assembly with gyroscopic stiffener" was invented by Krzysztof Gajowniczek (Rzeszow, Poland).

According to the abstract* released by the U.S. Patent & Trademark Office: "A rotor assembly for an aircraft engine that includes a compressor rotor and a turbine rotor mounted to a shaft for rotation about a central axis, and a gyroscopic stiffener also mounted to shaft. The gyroscopic stiffener includes a gyroscopic disk extending radially away from the shaft and located at an axial position that is spaced apart from the bearings, and an attachment mechanism connecting the gy...