US Patent Issued to BorgWarner on Dec. 16 for "Rotor assembly" (Japanese, American Inventors)

ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,500,462, issued on Dec. 16, was assigned to BorgWarner Inc. (Auburn Hills, Mich.).

"Rotor assembly" was invented by Mitsuru Ishihara (Kanagawa, Japan), Andreas WP Mayer (Clarkston, Mich.) and Calahan B. Campton (Royal Oak, Mich.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A rotor assembly for an electric motor includes a shaft, a lamination stack, a plurality of magnets including a first magnet, and a plurality of pole pieces including a first pole piece. The first magnet is disposed between the lamination stack and the first pole piece, and each pole piece has an outer pole surface. The rotor assembly also includes a sleeve including an outer sleeve...