ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,768,435, issued on Oct. 20, was assigned to HARMONIC DRIVE SYSTEMS INC. (Tokyo).
"Strain wave gearing and externally toothed gear" was invented by Norio Shirokoshi (Azumino, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An externally toothed gear of a strain wave gearing is provided with external teeth, the tooth profile of which gradually changes along the tooth trace direction. The external teeth each includes an external tooth portion that is capable of meshing between internal teeth of an internally toothed gear, and an external tooth extension portion that does not mesh with the internal teeth. The external tooth extension portion has a tape...