ALEXANDRIA, Va., July 9 -- United States Patent no. 12,352,283, issued on July 8, was assigned to MITSUBISHI HEAVY INDUSTRIES COMPRESSOR Corp. (Tokyo).
"Rotor and compressor" was invented by Noriyuki Okada (Tokyo), Nobuyori Yagi (Tokyo) and Hideki Nagao (Hiroshima, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A rotor includes a bolt fixing portion having a plurality of bolts for collectively fixing a plurality of impellers including a disk having a central shaft structure. The disk has a first fitting portion having a plurality of first protrusion portions and first recessed portions, a second fitting portion having a plurality of second protrusion portions and second recessed portions, and a plurali...