ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,523,149, issued on Jan. 13, was assigned to AKTIEBOLAGET SKF (Gothenburg, Sweden).
"Cutting-ring assembly" was invented by Wolfgang Aust (Bamberg, Germany) and Josef Hahn (Schweinfurt, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A cutting ring assembly for a tunnel boring machine includes a fixed axle, an inner ring rotationally fixed to the axle and having an inner raceway on a radially outer surface, a cutting ring having a radially inner surface forming an outer raceway, and a plurality of rolling elements between the inner raceway and the outer raceway supporting the cutting ring on the inner ring for rotation relative to the axle."
The ...