ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,539,570, issued on Feb. 3, was assigned to KITAGAWA IRON WORKS Co. LTD. (Fuchu, Japan).

"Cam mechanism, cam mechanism manufacturing method, camshaft manufacturing method, NC rotary table" was invented by Tetsuya Ogasawara (Fuchu, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A cam mechanism includes a base, a roller gear, and a camshaft. The roller gear and the camshaft are rotatably supported by the base. The roller gear has a turret and a plurality of cam followers mounted on the circumference of the turret. The camshaft has a shaft portion and a tapered rib having a first tapered rib and a second tapered rib. The first and second tapered ribs a...