ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,704,130, issued on Aug. 11, was assigned to MABUCHI MOTOR Co. LTD. (Chiba, Japan).
"Centrifugal fan" was invented by Kenji Shiraki (Chiba, Japan), Tetsushi Yoshikawa (Chiba, Japan) and Sakie Kawakami (Chiba, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A centrifugal fan includes a first portion provided in a rotor, and a second portion provided in a fan unit and having a greater linear coefficient of expansion than that of the first portion. The first portion has a first top portion and a first tubular portion. The second portion has a second top portion and a second tubular portion. The second tubular portion has an inner tube surface facing an...