ELECTRICAL BOX FOR CONCRETE WALLS

• US 20090008121A1
• Filed: 09/19/2008
• Published: 01/08/2009
• Est. Priority Date: 08/31/2005
• Status: Active Grant

• Current Assignee: Thomas & Betts International LLC (ABB Limited)
• Original Assignee: Thomas & Betts International Incorporated (ABB Limited)
• Inventors: Lupsa, Ioan Liviu, Lalancette, Daniel
• Granted Patent: US 7,563,978 B2
• Time in Patent Office: Days
• US Class Current: 174/58
• CPC Class Codes: H02G 3/121 in plain walls
• CPC Class Codes: Y10S 248/906 Electrical outlet box support

Abstract

An electrical outlet box for accommodating an electrical fixture which includes a generally rectangular box having a back wall, a perimetrical side wall surrounding said back wall defining an open front face and a box interior, said side wall includes a first and second set of generally parallel spaced apart wall portions; and a slidable extension nested within said generally rectangular box, that can be moved from within the generally rectangular box to an extended position beyond the open front face.

Claims

1. An electrical outlet box for accommodating an electrical fixture comprising:

a generally rectangular box having a back wall, a perimetrical side wall surrounding said back wall defining an open front face and a box interior;

a slidable extension nested within said generally rectangular box, that can be moved from within said generally rectangular box to an extended position beyond said open front face, wherein said slideable extension can be secured in said extended position beyond said open front face; and

a movable ground screw mounting tab.

2. An electrical outlet box of claim 1, having outwardly directed collars extending from one pair of parallel wall portions adjacent said open front face;

and movable fastening structures slidably held within said collars for rigidly mounting said electrical outlet box to a structural member.

3. An electrical outlet box of claim 2, wherein said movable fastening structures have a notch for facilitating removal of a portion of said movable fastening structures.

4. An electrical outlet box of claim 1, further including frangible elements on said side wall and said back wall for creating an opening into said box interior.

5. An electrical outlet box of claim 4, wherein said frangible elements are generally circular.

6. An electrical outlet box of claim 5, wherein said frangible elements include an oval shaped frangible port located approximately at the center of said frangible element.

7. An electrical outlet box of claim 1, wherein said extended position beyond said open front face is a predetermined distance that corresponds to the depth of a wall finish material.

8. An electrical outlet box of claim 3, wherein said notch is located at a predetermined point along said movable fastening structures that corresponds to the distance said fastening structures protrude from a finished wall.