ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,381,446, issued on Aug. 5, was assigned to NIDEC Corp. (Kyoto, Japan).
"Motor unit with oil colling passage" was invented by Yasuo Yamaguchi (Kyoto, Japan) and Yuki Ishikawa (Kyoto, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A motor unit includes a motor including a rotor to rotate about a motor axis, and a stator radially outside of the rotor, a reduction gear connected to the motor, a differential connected to the motor through the reduction gear, a housing including a housing space to house the motor, the reduction gear, and the differential, and an oil passage to lead an oil to the motor. The oil passage includes an electric pump and a cool...