Prefabricated electrical box

• US 10,411,450 B2
• Filed: 03/21/2013
• Issued: 09/10/2019
• Est. Priority Date: 03/21/2012
• Status: Active Grant

• Current Assignee: Thomas & Betts International LLC (ABB Limited)
• Original Assignee: Thomas & Betts International LLC (ABB Limited)
• Inventors: Dinh, Cong Thanh, Beall, Christopher A.
• Primary Examiner(s): Patel, Dhiru R
• Application Number:
  US13/848,559
• Publication Number:
  US 20130248243A1
• Time in Patent Office: 2,364 Days
• Field of Search: 174535, 174 50, 174 58
• CPC Class Codes: H02G 1/00 Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
• CPC Class Codes: H02G 3/081 Bases, casings or covers
• CPC Class Codes: H02G 3/086 Assembled boxes
• CPC Class Codes: H02G 3/14 Fastening of cover or lid to box
• CPC Class Codes: Y10T 29/49002 Electrical device making

Abstract

An improved electrical box is disclosed that incorporates a bracket and device cover as a single combined unit. The combined unit is simpler to manufacture and to install as opposed to three separate pieces.

Claims

1. An electrical housing assembly comprising:

a. an electrical box having a plurality of sidewalls and a rear surface, the plurality of sidewalls having an upper edge that defines an opening into the electrical box;

b. a mounting bracket outwardly extending from the upper edge of each of at least a first sidewall and a second sidewall of the plurality of sidewalls of the electrical box, the mounting bracket being integrally formed with the first sidewall and the second sidewall, the mounting bracket for each of the first and second sidewalls extending along approximately the entire length of the upper edge; and

c. a device cover having a generally flat surface containing a cover opening configured to receive an electrical component, the device cover further including mounting holes for affixing the electrical component to the device cover, the device cover being integrally formed with a third sidewall of the plurality of sidewalls,

wherein the device cover is attached to the third sidewall by a living hinge that accommodates pivotal displacement of the device cover relative to the third sidewall from an open position to a closed position, the device cover configured to cover a portion of the opening of the electrical box when the devivbce cover is in the closed position, the living hinge comprising a weakened portion of material that adjoins the device cover to the third sidewall that accommodates pivotal displacement of the device cover along an axis formed at an intersection of the third sidewall and the device cover.

2. The electrical housing assembly of claim 1, wherein the mounting bracket outwardly extends perpendicularly from the upper edge of the first sidewall of the electrical box.

3. The electrical housing assembly of claim 1, wherein a tab extends from at least one sidewall of the plurality of sidewalls and beyond the rear surface to form a far side support.

4. The electrical housing assembly of claim 3, wherein the far side support includes a notch to facilitate bending of the far side support.

5. The electrical housing assembly of claim 1, wherein the electrical housing assembly is made from a single piece of stamped metal and remains one integral piece upon assembly.

6. The electrical housing assembly of claim 1, wherein the electrical housing assembly is constructed from:

a first piece of metal comprising the mounting bracket, the rear surface, the first sidewall, and the third sidewall of the plurality of sidewalls, the living hinge, and the device cover, the first sidewall and the third sidewall being on opposing sides of the electrical box;

a second piece of metal comprising the second sidewall of the plurality of sidewalls; and

a third piece of metal comprising a fourth sidewall of the plurality of sidewalls, the second and fourth sidewalls being on opposing sides of the electrical box.

7. The electrical housing assembly of claim 6, wherein the second piece of metal and the third piece of metal are identical.

8. The electrical housing assembly of claim 1, further comprising a retention mechanism for keeping the device cover in the closed position.

9. The electrical housing assembly of claim 8, wherein the retention mechanism comprises a locking tab extending from the device cover and a corresponding catch on the electrical box configured to receive the locking tab.

10. The electrical housing assembly of claim 1, further comprising knockouts located on at least the rear surface of the electrical box for removal of an area of the electrical box for the passage of wires.

11. The electrical housing assembly of claim 1, further comprising a hole configured to allow the passage of a threaded portion of a screw in the device cover and a corresponding cover attachment screw holes on the electrical box for receiving the threaded portion of the screw.

12. The electrical housing assembly of claim 1, wherein the device cover includes an extendable sleeve that is configured for selective linear extension relative to at least other portions of the device cover to accommodate thicker walls.

13. The electrical housing assembly of claim 1, wherein the plurality of sidewalk further includes a fourth sidewall, and wherein the mounting bracket outwardly extends from the upper edge of each of the first, second, and fourth sidewalk.