Patent ID: 7143802

Claim:
A cordless window blind assembly comprising: a headrail having a longitudinal axis extending between first and second ends thereof; a first tube rotatably mounted between the first and second ends of said headrail; a first motor coupled with said first tube for driving said first tube; a second tube rotatably mounted between said first tube and the second end of said headrail; a second motor coupled with said second tube for driving said second tube; a bottom rail suspended below said headrail; an intermediate rail suspended below said headrail and positioned between said headrail and said bottom rail; a window covering material extending between said intermediate rail and said bottom rail; a first lift cord having an upper end secured to said first tube and a lower end secured to said intermediate rail; and a second lift cord having an upper end secured to said second tube and a lower end secured to said bottom rail, wherein said intermediate rail and said bottom rail are movable independently of one another.