US Patent Issued to MAKINO MILLING MACHINE on Feb. 4 for "Milling tool and workpiece machining method" (Japanese Inventors)

ALEXANDRIA, Va., Feb. 5 -- United States Patent no. 12,214,430, issued on Feb. 4, was assigned to MAKINO MILLING MACHINE Co. LTD. (Tokyo).

"Milling tool and workpiece machining method" was invented by Fukuhito Nagata (Fujiyoshidai, Japan), Ryoichi Miyamoto (Fujiyoshidai, Japan) and Hiroshi Ueno (Fujiyoshidai, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A milling tool includes a shank section and a head, the head provided on a tip end side of the shank section and having cutting edges. The head includes an expanding diameter section and a contracting diameter section, the expanding diameter section gradually increasing in diameter as it spans toward the tip end from a base end portion adjoining the s...