US Patent Issued on Sept. 15 for "Motor rotor with inner sleeve" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 15 -- United States Patent no. 12,738,785, issued on Sept. 15.

"Motor rotor with inner sleeve" was invented by Shun Nakayama (Tokyo), Yuji Sasaki (Tokyo), Yoshihito Katsu (Tokyo), Koji Sakota (Tokyo) and Yoshikazu Mineda (Yokohama, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A rotor includes a shaft, a magnet located around the shaft, an inner sleeve located around the shaft and between the shaft and the magnet, and an end ring located around the inner sleeve and positioned adjacent to the magnet. The inner sleeve includes a holding portion having an inner diameter that surrounds and holds the shaft, and a gap forming portion including a first inner diameter that is larger tha...