ALEXANDRIA, Va., June 17 -- United States Patent no. 12,311,708, issued on May 27, was assigned to Qingdao Mihong Machinery Co. Ltd. (Qingdao, China).
"Pulley fastener for connecting with trailer shackles" was invented by Yadan Liu (Shandong, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A pulley fastener for connecting with trailer shackles is provided, including a bolt. A pulley body is provided on an outside surface of the bolt, a first split shackle and a second split shackle are rotatably connected to the outside surface of the bolt and located on both sides of the pulley body, respectively. Both ends of the bolt are screwed with nuts for fixing the first split shackle and the second split shackl...