ALEXANDRIA, Va., May 5 -- United States Patent no. 12,617,481, issued on May 5, was assigned to ITALTRACTOR ITM S.P.A..

"Support roller for vehicle tracks" was invented by Eustachio Calia (Matera, Italy), Adriano Bellini (Modena, Italy) and Askar Echamanov (Frazione Gambulaga, Italy).

According to the abstract* released by the U.S. Patent & Trademark Office: "A support roller for vehicle tracks, includes a tubular body rotatable on a supporting shaft integral with a chassis; the tubular body has an external surface for accommodating a portion of an internal face of a respective chain. The supporting shaft comprises at least three consecutive cylindrical segments having constant external diameters and increasing progressively from one segm...