Fire stop frame assembly

• US 7,478,503 B2
• Filed: 10/28/2005
• Issued: 01/20/2009
• Est. Priority Date: 11/01/2004
• Status: Expired due to Fees

• Current Assignee: Columbia-MBF, Inc. (Atkore, Inc.)
• Original Assignee: Columbia-MBF, Inc. (Atkore, Inc.)
• Inventors: Didone, Brian, Milani, Walter, Whitty, Larry
• Primary Examiner(s): Canfield; Robert J
• Assistant Examiner(s): Herring; Brent W
• Application Number:
  US11/260,094
• Publication Number:
  US 20060102369A1
• Time in Patent Office: 1,180 Days
• Field of Search: 522/32, 522/208, 523/17, 277/615
• US Class Current: 52/232
• CPC Class Codes: E04B 5/48 Special adaptations of floors for incorporating ducts, e.g. for heating or ventilating in block-shaped elements E04C1/39; in slab- or sheet-shaped elements E04C2/52
• CPC Class Codes: F16L 5/04 to form a firebreak device
• CPC Class Codes: H02G 3/0412 Heat or fire protective means for fire in electric circuits A62C3/16
• CPC Class Codes: H02G 3/185 Floor outlets and access cups

Abstract

A fire stop assembly for bordering a conduit access through a building separation, includes a rigid body portion with an access opening with the access opening being adjustably closed to define a conduit fitting opening within the access opening. The remainder of the access opening is adjustably closed by a fire block arrangement comprising a lining of intumescent material on opposite sides of a conduit fitting opening and a series of non intumescent flame retardant members cooperating with the lining of intumescent material to close the remainder of said access opening. Preferably the non-intumescent flame retardant members are a series of plastic sleeves filled with mineral wool or other suitable insulation material. The sleeves and fill material are removable to adjust the opening size. The sleeves serve to protect the insulation material during the normal life of the fire stop assembly until a fire condition occurs.

Claims

1. A fire stop assembly for bordering a conduit access through a building separation, said fire stop assembly having a rigid body portion with an access opening through said rigid body portion, said access opening being adjustably closed by a fire block arrangement to define a conduit fitting opening forming part of said access opening;

said fire block arrangement comprising a lining of intumescent material adjacent said conduit fitting opening and a series of non-intumescent flame retardant members cooperating with said lining of intumescent material to close said access opening about said conduit fitting opening wherein said series of non-intumescent flame retardant members are a series of elongate members having a receiving cavity extending in the length thereof and filled with a fire retardant insulation material and wherein said lining includes a movable channel slidable with respect to the rigid body portion and removeably affixed thereto.

2. A fire stop assembly as claimed in claim 1 wherein said rigid body portion is made of a metallic material to enhance transfer of heat energy from said rigid body portion to said lining of intumescent material.

3. A fire stop assembly as claimed in claim 1 wherein said fire retardant insulation material is compressed and retained compressed by the respective receiving cavity of the elongate member.

4. A fire stop assembly as claimed in claim 3 wherein said fire retardant insulation material is mineral wool.

5. A fire stop assembly as claimed in claim 1 wherein said elongate members are plastic tubes.

6. A fire stop assembly as claimed in claim 5 wherein said plastic tubes are made of a PVC material.

7. A fire stop assembly as claimed in claim 5 wherein said plastic tubes are made of a PVC material.

8. A fire stop assembly as claimed in claim 5 wherein said plastic tubes are of a generally rectangular cross section.

9. A fire stop assembly as claimed in claim 8 wherein said generally rectangular plastic tubes have a short side and a long side in cross section and said long side is disposed parallel to a depth of said rigid body portion.

10. A fire slop assembly as claimed in claim 8 wherein said plastic tubes are slidably supported in said rigid body portion.

11. A fire stop assembly as claimed in claim 10 herein said rigid body portion has an access port through a frame member thereof arranged to allow slide removal of any of said plastic tubes to increase the side of said conduit fitting opening to accommodate additional conduits.

12. Afire stop assembly as claimed in claim 11 wherein said access port through said frame member includes a movable member for selective opening and closing of said access port.

13. A fire stop assembly as claimed in claim 11 wherein said plastic tubes are of a PVC material and said flame retardant insulation material is mineral wool or other suitable glass fiber insulation material.

14. A fire stop assembly as claimed in claim 1 wherein said lining of intumescent material is on either side of said conduit fitting opening.

15. A fire stop assembly as claimed in claim 14 wherein said lining of intumescent material is retained in a movable channel spanning the rigid body portion.

16. A fire stop assembly as claimed in claim 1 wherein said rigid body portion includes an access port in a side thereof through which non-intumescent flame retardant members can be longitudinally withdrawn.

17. A fire stop assembly as claimed in claim 16 wherein said access port in said side of said rigid body portion includes a cover for selective opening and closing of said access port.