Friction drawer slide

• US 7,744,176 B2
• Filed: 01/04/2005
• Issued: 06/29/2010
• Est. Priority Date: 11/16/2000
• Status: Active Grant

• Current Assignee: Accuride International Incorporated (Accuride Corporation)
• Original Assignee: Accuride International Incorporated (Accuride Corporation)
• Inventors: Milligan, Charles A.
• Primary Examiner(s): Tran; Hanh V
• Application Number:
  US11/029,309
• Publication Number:
  US 20050116595A1
• Time in Patent Office: 2,002 Days
• Field of Search: 3123347-3348, 312/334.16, 31233422-33424, 312/334.28, 312/334.31, 312/334.32, 312/334.36, 384/20, 384/23, 108/147.19, 108/147.21
• US Class Current: 312/334.32
• CPC Class Codes: A47B 2210/0059 Guide located at the side of the drawer
• CPC Class Codes: A47B 2210/007 Three slide synchronisation
• CPC Class Codes: A47B 2210/0081 Telescopic drawer rails with stop blocks, e.g. synchronization buffers
• CPC Class Codes: A47B 88/49 with double extensible guides or parts

Abstract

A telescopic drawer slide including first, second and third drawer slides, each having a longitudinal length with a web and arcuate arms along the longitudinal margins of the web, the second drawer slide being nested within the arcuate arms of the first drawer slide, and the third drawer slide being nested within the arcuate arms of the second drawer slide. There is a lock between the second drawer slide and the first drawer slide, the lock having a biased tab rotatably coupled to the second drawer slide and an emboss on the first drawer slide. The tab moves into a portion of the emboss upon movement over the emboss, thereby preventing the second drawer slide from closing relative to the third drawer slide.

Claims

1. A telescopic drawer slide comprising:

a first drawer slide having a longitudinal length with a web and slideways along the longitudinal margins of the web;

a second drawer slide having a longitudinal length with a web and slideways along the longitudinal margins of the web, the second drawer slide being nested within the slideways of the first drawer slide;

a third drawer slide having a longitudinal length with a web, the third drawer slide being nested within the slideways of the second drawer slide; and

wherein the slideways of the first drawer slide have a bowed lateral portion, said entire bowed lateral portion defining a curve having a generally constant radius of curvature bowed towards the slideways of the second drawer slide, the bowed lateral portion including a contact area in direct sliding contact with the slideways of the second drawer slide.

2. The telescopic drawer slide of claim 1, wherein the slideways of the first drawer slide are slightly concave inward.

3. The telescopic drawer slide of claim 1, wherein the bowed lateral portion of the first drawer slideways provides pockets running along the longitudinal length of the first drawer slide along edges of the bowed lateral portion.

4. The telescopic drawer slide of claim 3, wherein the pockets provide reservoirs for lubricating material.

5. The telescopic drawer slide of claim 3, wherein the pockets provide a depository for minute particles of materials produced during use of the slide.

6. The telescopic drawer slide of claim 1, wherein the first drawer slide includes a plurality of holes for attachment.

7. The telescopic drawer slide of claim 1, wherein at least one bracket is attached to the first drawer slide for attachment.

8. The telescopic drawer slide of claim 1, wherein the slideways of the first drawer slide further comprise a vertical portion.

9. The telescopic drawer slide of claim 1, wherein the slideways of the second drawer slide further comprise a vertical portion.

10. The telescopic drawer slide of claim 1, wherein the second drawer slideways are not concave inward.

11. The telescopic drawer slide of claim 1, wherein the second drawer slideways are flat.

12. The telescopic drawer slide of claim 10, wherein the inside corners of the second drawer slideways comprise sharp corners.

13. The telescopic drawer slide of claim 12, wherein the outside corners of the second drawer slideways are curved.

14. The telescopic drawer slide of claim 12, wherein the center of the second drawer web comprises a hat section.

15. The telescopic drawer slide of claim 14, wherein the third drawer web comprises an inner hat section.

16. The telescopic drawer slide of claim 15, wherein the inner hat section is sufficiently raised to prevent contact between the hat sections of the second and the third drawer slides.

17. The telescopic drawer slide of claim 1, wherein the third drawer web includes a plurality of holes for attachment.

18. The telescopic drawer slide of claim 1, wherein the third drawer slide includes an edge sliding on the slideways of the second drawer slide.

19. The telescope drawer slide of claim 1, wherein the bowed lateral portion contact area is at the top of the curve in a middle of the slideways.