Window treatment hembar

Patent metadata

Field	Value
Publication number	US-11215008-B2
Application number	US-201815964274-A
Country	US
Kind code	B2
Filing date	Apr 27, 2018
Priority date	Apr 28, 2017
Publication date	Jan 4, 2022
Grant date	Jan 4, 2022

Abstract

A hembar may define a front portion and a rear portion configured to slidably engage each other. The front portion and the rear portion, when slidably engaged, may define a slot configured to receive a piece of fabric. The front portion and the rear portion may be configured to clamp the piece of fabric within the slot. The front portion and the rear portion may be configured such that a width of the slot is adjustable. The front portion may define a first attachment surface and the rear portion may define a second attachment surface. The first attachment surface may define a rib. The second attachment surface may define a groove configured to receive the rib when the front portion is slidably engaged with the rear portion such that the piece of fabric is clamped within the slot.

First claim

What is claimed is:

1. A hembar comprising:
a first portion;
a second portion configured to slidably engage the first portion, wherein the first portion and the second portion define a slot configured to receive a piece of fabric; and
a compressible member enclosed within an internal cavity of the hembar, the compressible member having a first diameter in a relaxed position and a second diameter in a longitudinally stretched position, wherein the first diameter is greater than the second diameter, and wherein the compressible member is configured to, when released from the longitudinally stretched position, exert a force on the first portion and the second portion such that the piece of fabric is clamped within the slot.

2. The hembar of claim 1 , wherein the first portion and the second portion are configured such that a width of the slot is adjustable.

3. The hembar of claim 2 , wherein the width of the slot is continuously variable from a first width to a second width.

4. The hembar of claim 1 , wherein the piece of fabric is attached to the first portion or the second portion within the slot using double-sided tape.

5. The hembar of claim 1 , wherein the first portion defines a first attachment surface and the second portion defines a second attachment surface, and wherein the first attachment surface is configured to press against the second attachment surface when the first portion is slidably engaged with the second portion.

6. The hembar of claim 5 , wherein the internal cavity of the hembar is defined by the first portion and the second portion, and wherein the compressible member exerts the force on the first portion and the second portion such that the piece of fabric is clamped between the first attachment surface and the second attachment surface.

7. The hembar of claim 6 , wherein the compressible member is a hollow rubber spline.

8. The hembar of claim 5 , wherein the first attachment surface defines a rib and the second attachment surface defines a groove configured to receive the rib when the first portion is slidably engaged with the second portion.

9. The hembar of claim 8 , wherein the rib and groove are configured to clamp the piece of fabric within the slot.

10. The hembar of claim 1 , wherein the first portion and the second portion are configured to be pulled together into secured engagement.

11. The hembar of claim 1 , wherein the first portion defines a first flange and a first channel, and wherein the second portion defines a second flange and a second channel, and wherein the first flange is received within the second channel and the second flange is received within the first channel such that alignment is maintained between the first portion and the second portion.

12. The hembar of claim 1 , wherein the first portion and the second portion are configured to be locked together.

13. A hembar comprising:
a front wall defining a substantially vertical front surface;
a rear wall defining a substantially vertical rear surface, the front wall and the rear wall spaced from each other by a horizontal distance;
a bottom wall defining a substantially horizontal bottom surface;
a slot located between the front wall and the rear wall, the slot configured to receive a flexible material; and
a rubber spline enclosed within an internal cavity of the hembar, the rubber spline having a first diameter in a relaxed position and a second diameter in a longitudinally stretched position, wherein the first diameter is greater than the second diameter, and wherein the rubber spline is configured to, when released from the longitudinally stretched position, exert a force such that the flexible material is clamped within the slot, and
wherein the hembar defines a vertical distance from an opening of the slot to the bottom wall, and wherein the horizontal distance is greater than the vertical distance,
wherein the hembar comprises two or more pieces that slidably attach to one another.

14. The hembar of claim 13 , wherein a first piece of the two or more pieces comprises the front wall and a second piece of the two or more pieces comprises the rear wall.

15. The hembar of claim 14 , wherein the rubber spline is elongate within the internal cavity, and wherein the internal cavity is defined by the first piece and the second piece.

16. The hembar of claim 15 , wherein the rubber spline is configured to exert the force on the first piece and the second piece such that the flexible material is clamped within the slot.

17. The hembar of claim 13 , wherein the hembar defines a center of gravity that is aligned with the slot.

18. The hembar of claim 13 , wherein the slot extends along a length of the hembar.

19. The hembar of claim 13 , wherein the slot is located at a midpoint between the front wall and the rear wall.

20. The hembar of claim 13 , wherein a weight of the hembar is divided substantially equally on either side of the slot.

21. The hembar of claim 13 , wherein a depth of the hembar is at least two times a height of the hembar.

Assignees

• Lutron Tech Co Llc

Inventors

• Blair Edward J
• Kirby David A
• Pejic Vladislav

Classifications

• E06B9/17046

  Bottom bars · CPC title

• E06B9/42 Primary

  Parts or details of roller blinds, e.g. suspension devices, blind boxes (brackets or adjustable mountings for roller blinds and drawable curtains A47H1/13) · CPC title

• E06B9/388

  Details of bottom or upper slats or their attachment · CPC title

• A47H23/01

  Bottom bars for stretching hanging curtains; Magnets, slide fasteners, or the like to improve closing of curtains · CPC title