ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,480,531, issued on Nov. 25, was assigned to DAIKIN INDUSTRIES LTD (Osaka, Japan).
"Bell mouth and fan unit" was invented by Zuozhou Chen (Osaka, Japan), Ryusuke Otaguro (Osaka, Japan), Anan Takada (Osaka, Japan) and Kaname Maruyama (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A bell mouth includes a circumferential wall, and a pressure changing component permeable portion arranged in the circumferential wall at a location where a separated distance from an axial fan is minimal. A fan unit includes the bell mouth, an axial fan, and a case that accommodates the axial fan and the bell mouth. The fan unit has an air layer between the circumf...