US Patent Issued on June 16 for "Motor rotor with fractured magnet" (Japanese Inventors)

ALEXANDRIA, Va., June 16 -- United States Patent no. 12,658,750, issued on June 16.

"Motor rotor with fractured magnet" was invented by Kai Iijima (Tokyo), Naoki Oiwa (Tokyo), Natsuki Yoneyama (Tokyo), Yuji Sasaki (Tokyo), Yoshihito Katsu (Tokyo) and Hikaru Sugiura (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A motor rotor includes a rotatable shaft, and a magnet structure mounted around the shaft. The magnet structure includes magnet pieces including a first magnet piece and a second magnet piece. The first magnet piece has a fracture surface facing the second magnet piece, and an outer surface forming a circumferential surface of the magnet structure. A surface roughness of the fracture surface is...