ALEXANDRIA, Va., May 5 -- United States Patent no. 12,618,480, issued on May 5, was assigned to ZHEJIANG DUNAN ARTIFICIAL ENVIRONMENT Co. LTD. (Shaoxing, China).
"Ball valve" was invented by Zhouyang Shou (Shaoxing, China), Yongbin Xuan (Shaoxing, China) and Ligang Hua (Shaoxing, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present application provides a ball valve. The ball valve includes a valve body, a valve seat, and a valve rod. The valve seat is installed on the valve body. One end of the valve rod is rotatably installed in the valve body, and the other end of the valve rod extends out of the valve body via the valve seat. A position of the valve rod penetrating through the valve seat is pr...