# US 9,750,347 B2 · Pressure release slide latch mechanism

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- Number: US 9,750,347 B2
- Document ID: US9750347B2
- Status: Granted
- Kind: B2
- Application number: 14/281,643
- Filed: 2014-05-19
- Published: 2014-10-23
- Granted: 2017-09-05
- Earliest claimed: 2012-04-30
- Assignees: Hardware Resources, Inc.
- Applicants: Hardware Resources, Inc.
- Inventors: Grant Nuckolls
- Web page: https://patentgrep.com/patent/US9750347B2

## CPC

- A47B 88/463: self-opening
- A47B 88/40: Sliding drawers; Slides or guides therefor
- A47B 88/443: Successive movement of rails within drawer slides, i.e. at least one rail element is not moving during the movement of other elements
- A47B 88/453: Actuated drawers
- A47B 88/46: operated by mechanically-stored energy, e.g. by springs
- A47B 88/467: self-closing
- A47B 88/477: Buffers; End stops
- Y10T 29/49: Method of mechanical manufacture
- Y10T 29/49764: with testing or indicating
- A47B: TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE (furniture jointing F16B)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A pressure release slide latch mechanism for a drawer slide assembly comprises an outer slide, an intermediate slide mounted in the outer slide, and an inner slide mounted in the intermediate slide, a channel plate having a track portion and a guide block attached to the outer slide and a carriage slidingly engaged and biased along the track portion. A pin of a follower pivotally attached to the inner slide engages the guide block to releasably maintain the drawer slide assembly in a closed position and releases upon an inward force applied to the drawer slide assembly. A set of chamfers is formed on the pressure release slide latch mechanism to prevent binding of the drawer slide assembly.

## Claims

### Claim 1

A drawer slide assembly comprising:
an outer slide member;
an intermediate slide member telescopically mounted to the outer slide member;
an inner slide member telescopically mounted to the intermediate slide member;
a pressure release slide latch mechanism between the outer slide member and the inner slide member;
a set of chamfers integrally formed on the pressure release slide latch mechanism;
the pressure release slide latch mechanism further comprising:
a follower, having a pin extending from a body, pivotally connected to the inner slide member;
a track connected to the outer slide member;
a guide block adjacent the track and having a set of channels releasably engaged with the pin;
a carriage slidably engaged with the track; and,
a biasing means, creating a bias between the carriage and the track;
whereby the set of chamfers slidably engage the intermediate slide member and the inner slide member as the intermediate slide member and the inner slide member move to and from a locked position with respect to the outer slide member.

### Claim 2 (depends on 1)

The drawer slide assembly of claim 1, wherein each chamfer of the set of chamfers further comprises:
a chamfer angle; and,
a chamfer length positioned at the chamfer angle.

### Claim 3 (depends on 1)

The drawer slide assembly of claim 1, wherein the set of chamfers further comprises:
a first subset of chamfers integrally formed on the guide block;
a second subset of chamfers integrally formed on the carriage, adjacent the first subset of chamfers; and,
a third subset of chamfers integrally formed on the track, adjacent the intermediate slide member.

### Claim 4

A drawer slide assembly comprising:
an outer slide member;
an intermediate slide member telescopically mounted to the outer slide member;
an inner slide member telescopically mounted to the intermediate slide member;
a follower pivotally connected to the inner slide member;
a track connected to the outer slide member;
a guide block adjacent the track and releasably engaged with the follower;
a carriage slidingly engaged with the track;
a biasing means, creating a bias between the carriage and the track;
a first set of chamfers integrally formed on the guide block;
a second set of chamfers integrally formed on the carriage;
a third set of chamfers integrally formed on the track;
whereby the first set of chamfers engage the second set of chamfers to maintain slidable engagement between the carriage and the guide block; and,
whereby the third set of chamfers engage the intermediate slide member to maintain slidable engagement between the intermediate slide member and the track.

### Claim 5 (depends on 4)

The drawer slide assembly of claim 4, wherein the guide block further comprises:
a ramp;
a plurality of channels adjacent the ramp;
a plurality of redirecting surfaces adjacent the ramp and the plurality of channels;
a latch member adjacent the plurality of channels; and
wherein the plurality of redirecting surfaces and the latch member define the plurality of channels.

### Claim 6 (depends on 5)

The drawer slide assembly of claim 5, further comprising a guide slot integrally formed in the inner slide member and wherein the follower further comprises:
a pin connected to the follower;
a guide post connected to the follower and extends into and slidingly engages with the guide slot;
whereby the guide slot and the guide post control a pivotal movement of the follower.

### Claim 7 (depends on 6)

The drawer slide assembly of claim 6, wherein a set of dimensions of the guide slot limit an arcuate path through which the follower pivotally moves thereby enabling the pin to consistently engage the ramp.

### Claim 8 (depends on 4)

The drawer slide assembly of claim 4, further comprising a fourth set of chamfers integrally formed on the carriage, opposite the second set of chamfers and slidably engaged with the inner slide member.