ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,486,715, issued on Dec. 2, was assigned to CHING FENG HOME FASHIONS Co. LTD. (Changhua County, Taiwan).
"Scrolling mechanism for window shades" was invented by Wen Ying Liang (Changhua County, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A scrolling mechanism for a window shade is received in a tube and includes a housing, a wheel, a driving gear, a bevel gear unit, a first scrolling unit and a second scrolling unit. Two springs are respectively connected to the first scrolling unit and the second scrolling unit. The driving gear drives the first scrolling unit, the first scrolling unit drives the second scrolling unit. The torque generated by t...