ALEXANDRIA, Va., April 7 -- United States Patent no. 12,597,817, issued on April 7, was assigned to TOYOTA BOSHOKU K.K. (Aichi-Ken, Japan).
"Rotor and method for manufacturing rotor" was invented by Makoto Kitahara (Toyota, Japan) and Masaki Sugiyama (Okazaki, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A rotor includes a rotor core including multiple housing holes, multiple magnets accommodated in the housing holes, and multiple plastic portions. Each plastic portion is formed by plastic that fills corresponding one of the housing holes and fixes the corresponding magnet to the rotor core. Each plastic portion includes an end face exposed from an opening of the corresponding housing hole. A gate ma...