ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,768,466, issued on Oct. 20, was assigned to ZHEJIANG DUNAN ARTIFICIAL ENVIRONMENT Co. LTD. (Shaoxing, China).
"Ball valve" was invented by Zhouyang Shou (Shaoxing, China) and Yongbin Xuan (Shaoxing, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present application relates to a ball valve. The ball valve includes a valve body, an end cover and a valve rod. The end cover is installed on the valve body, and one end of the valve rod is rotatably installed in the valve body, the other end of the valve rod extends out of the valve body through the end cover. A limiting member is arranged on an inner peripheral wall of the end cover, and the valve r...