ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,531,398, issued on Jan. 20, was assigned to Taizhou Dawei Electric Appliance Co. Ltd. (Taizhou, China).
"Threading device" was invented by Zao Feng (Taizhou, China), Hao Liu (Taizhou, China) and Ning Liu (Taizhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a threading device, wherein a bent pipe converging device in the threading device is rotationally disposed on a first rotating shaft through a first sleeve, an annular gasket and a clamp spring, the bent pipe converging device can rotate up and down and also can swing left and right, a rope arrangement auxiliary device consisting of a rope arrangement plate, a ...