ALEXANDRIA, Va., Aug. 5 -- United States Patent no. 12,700,431, issued on Aug. 4, was assigned to NIDEC Corp. (Kyoto, Japan).
"Base plate, motor, and disk drive device" was invented by Michihiro Ito (Kyoto, Japan), Takashi Mitsunari (Kyoto, Japan) and Kenta Miyoshi (Kyoto, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A base plate includes a bottom wall and a peripheral wall. The peripheral wall extends from the bottom wall to an axially upper side. The bottom wall includes a screw hole recessed from a peripheral edge of a lower end surface of the bottom wall to the axially upper side. The screw hole includes an inclined part and a column body. The inclined part is defined to have an inner diameter th...