ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,383,966, issued on Aug. 12, was assigned to DAIKIN INDUSTRIES LTD. (Osaka, Japan).
"Method for manufacturing screw rotor" was invented by Tadashi Okada (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A plurality of helical grooves are formed in a workpiece having a cylindrical shape. Each of grooves is divided into a first portion including an end portion on a first end side of the workpiece and a second portion including an end portion on a second end side of the workpiece. A method of manufacturing a screw rotor of a screw compressor includes attaching a first end of the workpiece to a holder of a machine tool, finishing the first portion...