ALEXANDRIA, Va., July 15 -- United States Patent no. 12,663,012, issued on June 23, was assigned to PAN AIR ELECTRIC Co. LTD. (Taichung City, Taiwan).
"Rotary fan structure" was invented by Ching-Wen Liu (Taichung City, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A rotary fan structure is provided. The rotary fan structure includes: a ceiling mount structure; a motor, disposed on the ceiling mount structure; a bearing, disposed on the ceiling mount structure; a slip ring set, including an outer ring member and an inner ring member, and the inner ring member having a fan power supply wire; a rotary shaft, and the inner ring member being sleeved on the rotary shaft; a coupling, disposed on the bearin...