ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,765,737, issued on Oct. 20, was assigned to SHENZHEN SILVER STAR INTELLIGENT GROUP Co. LTD. (Shenzhen, China).
"Lifting device and cleaning apparatus" was invented by Huajun Sun (Shenzhen, China) and Lirong Ye (Shenzhen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present application discloses the lifting device including: a drive motor, a rotating shaft, a transmission assembly, and a traction member; the rotating shaft includes a mounting portion and a lifting drive portion connected to the mounting portion; the transmission assembly is respectively connected to an output end of the drive motor and the rotating shaft; the traction member ...