ALEXANDRIA, Va., Sept. 3 -- United States Patent no. 12,404,861, issued on Sept. 2, was assigned to Edwards Japan Ltd. (Chiba, Japan).
"Vacuum pump and rotating body for vacuum pump" was invented by Yongwei Shi (Chiba, Japan) and Haruki Suzuki (Chiba, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A vacuum pump which can reduce a stress generated in a connected part between a rotating body and a rotating shaft is provided. A rotating body is provided having rotor blades provided on an outer periphery of a rotor-blade forming portion, and fastened to the rotor shaft by a bolt, and rotatable with the rotor shaft. At least either one of a fitting hole portion fitted with the rotating shaft and a through h...