ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,401,239, issued on Aug. 26, was assigned to DAIKIN INDUSTRIES LTD. (Osaka, Japan).
"Core, rotating electrical machine, and stationary apparatus" was invented by Shoujirou Naka (Osaka, Japan), Hiroshi Hibino (Osaka, Japan) and Daisuke Hiratsuka (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A core includes a laminated body. The laminated body includes a plurality of electrical steel sheets stacked one on another. The laminated body includes a contact area between a pair of adjacent electrical steel sheets of the plurality of electrical steel sheets. The contact area includes a first friction area and a second friction area with friction coe...