US Patent 11988037 Window blind lifting and tilting system

An apparatus for controlling tilting and lifting operation of a window blind is provided. The apparatus includes a tilting control shaft and a lifting control shaft. A ladder belt is fastened to the tilting control shaft and interconnects the slats of the window blind, such that rotating the tilting control shaft tilts the slats. Multiple lifting cords are fastened to the lifting control shaft and connected to the blind bottom of the window blind, such that rotating the lifting control shaft lifts or lowers the blind bottom and one or more slats.