ALEXANDRIA, Va., June 4 -- United States Patent no. 12,319,508, issued on June 3, was assigned to YANGZHOU WELDON TRANSMISSION EQUIPMENT Co. LTD (Yangzhou, China).
"Spiral conveyor" was invented by Baodong Wu (Yangzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A spiral conveyor includes a mesh chain spirally wound around and rotate synchronously with an outer circumference of each rotary drums. The inner side of each chain link of the mesh chain close to the rotary drum is provided with a drive head extending towards a drum body of the rotary drum. The drive head is provided with a convex-arc edge and includes an arc slot provided on each of two sides or on a single side of the drive head. Drivin...