Poke-through device

Patent metadata

Field	Value
Publication number	US-10530140-B2
Application number	US-201716079399-A
Country	US
Kind code	B2
Filing date	Feb 24, 2017
Priority date	Feb 26, 2016
Publication date	Jan 7, 2020
Grant date	Jan 7, 2020

Abstract

A poke-through device for installation in a hole in a floor structure, the floor structure defining a floor in a first working environment and a ceiling in a second working environment, the hole communicating between the first and second working environments, the poke through device. The poke-through device includes a body defining an interior and having an upper end and a lower end. A mounting frame is adapted to secure an electrical device within the body. A first intumescent member is disposed at the body upper end, and an electrical box is secured to the body lower end. A fire resistant gasket is disposed between the electrical box and the body lower end. The gasket includes openings therein to permit passage of wiring between the electrical box and the body.

First claim

What is claimed is:

1. A poke-through device for installation in a hole in a floor structure, the floor structure defining a floor in a first working environment and a ceiling in a second working environment, the hole communicating between the first and second working environments, the poke through device comprising:
a body defining an interior and having an upper end and a lower end;
a mounting frame adapted to secure an electrical device within the body;
a first intumescent member disposed at the body upper end;
an electrical box secured to the body lower end; and
a fire resistant gasket disposed between the electrical box and the body lower end, the gasket including openings therein to permit passage of wiring between the electrical box and the body.

2. The poke-through device as defined in claim 1 , wherein the gasket includes at least one slit therein to permit passage of wiring from the electrical box to the body.

3. The poke-through device as defined in claim 2 , wherein the gasket is disposed between a top surface of the electrical box and the body lower end.

4. The poke-through device as defined in claim 1 , wherein the gasket is formed of silicon coated fiberglass cloth.

5. The poke-through device as defined in claim 1 , wherein the first intumescent member is disposed on the body, wherein a portion of the first intumescent member extends above the body and a portion extends into the body.

6. The poke-through device as defined in claim 1 , a second intumescent member disposed in the body between the mounting frame and the body lower end, the second intumescent member including openings therein to permit wiring to pass therethrough.

7. The poke-through device as defined in claim 1 , including a cover assembly secure above the body upper end.

8. The poke-through device as defined in claim 7 , wherein the cover assembly includes a lid movable between an open and closed position.

9. The poke-through device as defined in claim 1 , wherein the mounting frame is formed of a non-metallic material.

10. The poke-through device as defined in claim 9 , including a plurality of metallic mounting plates secured to the mounting frame, the plurality of mounting plates adapted to secure an electrical device within the body.

11. The poke-through device as defined in claim 1 , wherein the electrical box is formed of a metallic material, and includes a metallic top secured to the body lower end, the top engaging and supporting the gasket.

12. A poke-through device comprising:
a body defining an interior and having an upper end and a lower end;
a mounting frame adapted to secure an electrical device within the body;
a first intumescent member disposed on the body upper end;
a second intumescent member disposed in the body between the mounting frame and the body lower end;
a fire resistant gasket disposed between the electrical box and the body lower end, the gasket including a slit that is sized and positioned to accommodate passage of wiring through the gasket, wherein the gasket is structured to resiliently urge portions of gasket that define the slit against wiring that passes through the slit and an electrical box secured to the body lower end.

13. The poke-through device as defined in claim 12 , wherein the gasket further includes openings therein to permit passage of mounting fasteners between the electrical box and the body.

14. The poke-through device as defined in claim 12 , wherein the first intumescent member is a ring-shaped member.

15. The poke-through device as defined in claim 14 , wherein the first intumescent member is sized such that upon a fire condition, the first intumescent member expands to fill a volume of the body between the mounting frame and the body upper end.

16. The poke-through device as defined in claim 15 , wherein the second intumescent member is sized such that upon a fire condition, the first intumescent member expands to fill a volume of the body between the mounting frame and the electrical box.

17. The poke-through device as defined in claim 12 , wherein the mounting frame is formed of a thermally non-conductive polymer material.

18. The poke-through device as defined in claim 17 , wherein at least one metallic plate is secured to the mounting frame, the metallic plate having mounting points thereon adapted to secure an electrical device thereto.

19. A poke-through device comprising:
a body defining an interior and having an upper end and a lower end;
a mounting frame including a plurality of metallic mounting plates secured thereto adapted to secure an electrical device within the body;
a first intumescent member disposed on the body upper end;
a second intumescent member disposed in the body interior between the mounting frame and the body lower end;
a metallic electrical box secured to the body lower end; and
a fire resistant gasket disposed between the electrical box and the body lower end, the gasket including slits therein to permit passage of wiring between the electrical box and the body and to retain the intumescent material in the body during a fire condition.

20. The poke-through device as defined in claim 19 , wherein the second intumescent member includes a pair of blocks each having an opening therethrough adapted to permit wiring to extend between the electrical box and the mounting frame.

21. The poke-through device as defined in claim 20 , wherein the pair of blocks each have a recess formed in a side wall wherein the pair of blocks form a central passage when placed in the body interior.

22. The poke-through device as defined in claim 19 , wherein the slits are adapted to closely conform to wiring passing there through to prevent expanding intumescent material from entering the electrical box when subjected to a fire condition.

Assignees

• Thomas & Betts Int Llc

Inventors

• Drane Mark R

Classifications

• H02G3/12

  for flush mounting · CPC title

• H02G3/081

  Bases, casings or covers · CPC title

• H02G3/185

  Floor outlets and access cups · CPC title

• H02G3/088 Primary

  Dustproof, splashproof, drip-proof, waterproof, or flameproof casings or inlets · CPC title

• H02G3/0412

  Heat or fire protective means (for fire in electric circuits A62C3/16) · CPC title