ALEXANDRIA, Va., July 16 -- United States Patent no. 12,671,289, issued on June 30, was assigned to Rolls-Royce Deutschland Ltd & Co KG (Blankenfelde-Mahlow, Germany).
"Electrical machine with rotor shaft cooling channels" was invented by Matthias Manig (Doberlug-Kirchhain, Germany) and Tobias Schumm (Munich).
According to the abstract* released by the U.S. Patent & Trademark Office: "An electrical machine is disclosed that has a stator and a rotor. The rotor, spaced apart radially from the stator, is configured to rotate about a longitudinal axis. An air gap extends between the rotor and the stator. The rotor has a rotor shaft having two end faces and a surface. A plurality of permanent magnets is connected to the rotor shaft and adjoin ...