US Patent Issued to DENSO on Oct. 20 for "Concave magnet for rotor of electric motor" (Japanese Inventors)

ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,771,192, issued on Oct. 20, was assigned to DENSO Corp. (Kariya-city, Japan).

"Concave magnet for rotor of electric motor" was invented by Keiji Kondo (Kariya-city, Japan), Hiroshi Endo (Kariya-city, Japan) and Akira Ozeki (Kariya-city, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A rotor having a magnet-embedded structure includes a rotor core and a permanent magnet held in the rotor core. A permanent magnet is accommodated in an accommodation hole provided in the rotor core. The permanent magnet has a first surface and a second surface which extend in a direction intersecting with the magnetization direction, which is a direction of magnetic f...