Nidec Assigned Patent

Nidec Corporation, Kyoto, Japan, has been assigned a patent (9,083,224) developed by Shiraishi, Masahiro, Sato, Kazuhiro, and Morita, Tsuyoshi, Kyoto, Japan, for a “method of manufacturing disk drive apparatus.”

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”A disk drive apparatus includes a rotor hub including an outer surface with a hub screw groove and a hub information mark indicative of a start position of the hub screw groove. A method of manufacturing the disk drive apparatus includes the steps of preparing a spindle motor including the rotor hub, preparing a clamper including a clamper screw groove, and fitting a recording disk to the spindle motor. The method further includes the steps of detecting a position of the hub information mark and, based on the detected position of the hub information mark, positioning each of the clamper and the spindle motor in a circumferential direction, and screwing the clamper to the spindle motor.“

The patent application was filed on March 14, 2013 (13/804,792).