ALEXANDRIA, Va., Jan. 29 -- United States Patent no. 12,209,639, issued on Jan. 28, was assigned to MITSUBA Corp. (Gunma, Japan).
"Planetary gear reduction mechanism" was invented by Motoaki Kobayashi (Gunma, Japan), Teppei Tokizaki (Gunma, Japan), Tohru Yumoto (Gunma, Japan) and Nobuyuki Nagai (Gunma, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A fifth ball bearing that rotatably supports a rotating shaft is provided on one side of a pinion gear in an axial direction of the rotating shaft. A sixth ball bearing that rotatably supports the rotating shaft is provided on the other side of the pinion gear in the axial direction of the rotating shaft. A carrier is provided with a bearing fixing portion t...