ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,427,594, issued on Sept. 30, was assigned to MAKINO MILLING MACHINE Co. LTD. (Tokyo).
"Tap tool and tapping method" was invented by Junichi Maeda (Kanagawa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The tap tool (10) has an axis of rotation (Cr) and machines a pilot hole (6') so that the same becomes a screw hole (6) in a state where the axis of rotation has been matched to a central axis (C6) of the pilot hole which is provided to a workpiece, wherein the tap tool (10) is characterized by being provided with: a thread section (14) having a blade section (14a) for machining a thread groove of the screw hole; pad sections (15, 16) located beh...