ALEXANDRIA, Va., June 9 -- United States Patent no. 12,287,030, issued on April 29.
"Planetary gear device" was invented by Soon Gil Jang (Seoul, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "A planetary gear device having four or more shafts is provided. The planetary gear device may be expanded by adding another planetary gear device to the planetary gear device in the related art, all shafts of the planetary gear device are exposed to the outside such that a brake may be easily installed, and the shafts may be divided into two groups and separated. The planetary gear device may be used for an apparatus for connecting, braking, and separating an automatic transmission, a plurality of power sup...