# US 7,744,176 B2 · Friction drawer slide

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- Number: US 7,744,176 B2
- Document ID: US7744176B2
- Status: Granted
- Kind: B2
- Application number: 11/029,309
- Filed: 2005-01-04
- Published: 2005-06-02
- Granted: 2010-06-29
- Earliest claimed: 2000-11-16
- Assignees: Accuride International, Inc.
- Inventors: Charles A. Milligan
- Web page: https://patentgrep.com/patent/US7744176B2

## CPC

- A47B 88/49: with double extensible guides or parts
- A47B 2210/0059: Guide located at the side of the drawer
- A47B 2210/007: Three slide synchronisation
- A47B 2210/0081: Telescopic drawer rails with stop blocks, e.g. synchronization buffers
- A47B: TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE (furniture jointing F16B)

## 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

### Claim 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.

### Claim 2 (depends on 1)

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

### Claim 3 (depends on 1)

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.

### Claim 4 (depends on 3)

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

### Claim 5 (depends on 3)

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

### Claim 6 (depends on 1)

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

### Claim 7 (depends on 1)

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

### Claim 8 (depends on 1)

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

### Claim 9 (depends on 1)

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

### Claim 10 (depends on 1)

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

### Claim 11 (depends on 1)

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

### Claim 12 (depends on 10)

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

### Claim 13 (depends on 12)

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

### Claim 14 (depends on 12)

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

### Claim 15 (depends on 14)

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

### Claim 16 (depends on 15)

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.

### Claim 17 (depends on 1)

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

### Claim 18 (depends on 1)

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

### Claim 19 (depends on 1)

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.