ALEXANDRIA, Va., June 17 -- United States Patent no. 12,312,687, issued on May 27, was assigned to XIAMEN YUNMAO TECHNOLOGY Co. LTD (Xiamen, China).
"Powder coating device" was invented by Yunyu Wang (Xiamen, China), Maosheng Zhao (Xiamen, China), Tong Wang (Xiamen, China) and Yanfeng Liu (Xiamen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A powder coating device includes a reaction device, a driving device, a gas supply device, and a gas delivery device. The gas delivery device includes a rotating shaft and a sleeve. The rotating shaft is connected to an inner cylinder and the driving device, and a first gas path communicated with a reaction chamber is defined along an axis of the rotating shaft, ...