Cordless shade lift system and headrail arrangement
View Patent ↗A covering for an architectural opening including a first rail, a second rail moveable relative to the first rail, a third rail moveable relative to the first rail, and a lift assembly coupled to the first rail. The lift assembly includes a first drum rotatable about a first axis, a second drum rotatable about a second axis; a first lift cord coupled between the first drum and the second rail, and a second lift cord coupled between the second drum and the third rail. The first drum is offset from the second drum, and a portion of the first drum overlaps a portion of the second drum along a third axis that is perpendicular to the first axis and the second axis.
1. A covering for an architectural opening comprising:
a first rail;
a second rail moveable relative to the first rail;
a third rail movable relative to the first rail;
a lift assembly coupled to the first rail; the lift assembly including:
a first drum rotatable about a first axis;
a second drum rotatable about a second axis;
a first lift cord coupled between the first drum and the second rail; and
a second lift cord coupled between the second drum and the third rail;
a cradle in which the first drum and the second drum are disposed;
a first cover pivotally attached to the cradle above the first drum; and
a second cover pivotally attached to the cradle above the second drum,
wherein the first drum is non-coaxial with the second drum, and wherein a portion of the first drum overlaps a portion of the second drum along a third axis that is perpendicular to the first axis; and wherein each of the first cover and the second cover include a wear bar, and wherein the first lift cord is supported upon the wear bar of the first cover and the second lift cord is supported upon the wear bar of the second cover.
2. The covering of claim 1 , wherein the first axis is parallel to the second axis.
3. The covering of claim 1 , wherein the first drum entirely overlaps the second drum along the third axis.
4. The covering of claim 1 , wherein the cradle includes an aperture through which the first lift cord and the second lift cord pass.
5. The covering of claim 1 , wherein the cradle includes a first support extending along the first axis upon which the first drum is rotatable, and a second support extending along the second axis upon which the second drum is rotatable.
6. The covering of claim 1 , wherein the third rail is moveable relative to the second rail.
7. The covering of claim 1 , wherein the lift assembly further includes:
a first spring motor and a first drive shaft drivingly coupled to the first spring motor;
wherein the first drive shaft is coupled to the first drum for co-rotation.
8. The covering of claim 7 , wherein the lift assembly further includes:
a second spring motor and a second drive shaft drivingly coupled to the second spring motor; wherein the second drive shaft is coupled to the second drum for co-rotation.
9. A cradle assembly for an architectural opening covering, the cradle assembly comprising:
a cradle;
a first drum supported within the cradle and rotatable about a first axis;
a second drum supported within the cradle and rotatable about a second axis;
a first cord coupled to the first drum;
a second cord coupled to the second drum;
a first cover pivotally attached to the cradle above the first drum; and
a second cover pivotally attached to the cradle above the second drum,
wherein the cradle includes an aperture through which the first cord and the second cord pass, and wherein each of the first cover and the second cover include a wear bar, and wherein the first lift cord is supported upon the wear bar of the first cover and the second lift cord is supported upon the wear bar of the second cover.
10. The cradle of claim 9 , wherein the cradle includes a first support extending along the first axis upon which the first drum is rotatable, and a second support extending along the second axis upon which the second drum is rotatable.
11. A cradle assembly for an architectural opening covering, the cradle assembly comprising:
a cradle;
a first drum supported within the cradle and rotatable about a first axis;
a first cord coupled to the first drum; and
a first cover movably attached to the cradle above the first drum;
wherein the cradle includes an aperture through which the first cord passes, and wherein the first cover includes a wear bar, and wherein the first lift cord is supported upon the wear bar of the first cover.