ALEXANDRIA, Va., March 12 -- United States Patent no. 12,246,444, issued on March 11, was assigned to Nabtesco Corp. (Tokyo).
"Gear mechanism and robot" was invented by Yuta Wanaka (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "One aspect of the present disclosure provides a strain wave gear device including an internal gear, an external gear and a wave generator. The wave generator has a cam and a fourth bearing. The cam has a non-circular outer peripheral surface, and the fourth bearing is positioned between the inner peripheral surface of the external gear and the outer peripheral surface of the cam. The fourth bearing has an outer ring, an inner ring, a plurality of balls, and a retainer. The stra...