US 7,143,802 B2 · Cordless blinds

Abstract

A window blind assembly includes 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 the headrail and a second tube rotatably mounted between the first tube and the second end of the headrail. The assembly also has a bottom rail suspended below the headrail, an intermediate rail suspended below the headrail and positioned between the headrail and the bottom rail, and a window covering material extending between the intermediate rail and the headrail, the window covering material having an upper end attached to the intermediate rail and a lower end attached to the bottom rail. The assembly further includes a first lift cord having an upper end secured to the first tube and a lower end secured to the intermediate rail, and a second lift cord having an upper end secured to the second tube and a lower end secured to the bottom rail, whereby the intermediate rail and the bottom rail are movable independently of one another.

Claims27

Dependent claims

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.

8 more elements

A cordless window blind assembly comprising:

a headrail having a longitudinal axis extending between first and second ends thereof;
a tube rotatably mounted between the first and second ends of said headrail;
a motor coupled with said tube for driving said tube;
a bottom rail suspended below said headrail by first and second lift cords;
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 guide connected to said headrail and being adapted to direct said first lift cord through a path including a first leg extending away from said tube, a second leg extending away from a first end of said tube and toward a second end of said tube, and a third leg extending away from said tube, through said intermediate rail and toward said bottom rail;
and
a second guide connected to said headrail and being adapted to direct said second lift cord through a path including a first leg extending away from said tube, a second leg extending away from the second end of said tube and toward the first end of said tube, and a third leg extending away from said tube, through said intermediate rail and toward said bottom rail, wherein said intermediate rail and said bottom rail are moveable independent of one another.

6 more elements

Dependencies are inferred from the claim text.

Cordless blinds

Life of this patent

Cordless blinds

Life of this patent

Abstract

Claims27