ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,512,709, issued on Dec. 30, was assigned to HITACHI ASTEMO LTD. (Hitachinaka, Japan).
"Rotating electric machine" was invented by Hideaki Goto (Hitachinaka, Japan), Shigehisa Aoyagi (Hitachinaka, Japan) and Takaki Itaya (Hitachinaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A rotating electric machine includes: a rotor core (22) that has magnet insertion holes (22b) (22c); permanent magnets (21) that are inserted into the magnet insertion holes (22b) (22c); and a groove (21cc) (21dc) that is formed in at least one of a plurality of non-magnetic pole surfaces (21c) (21d) of the permanent magnet (21) so as to allow a refrigerant (101) to flow ...