Adjustable size intumescent lined wall passthrough slot

Inactive Publication Date: 2007-02-08
LACHANCE MARC D
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0019] An advantage of the present invention is that it prevents the spread of fire through a wall passthrough slot.
[0020] Another advantage of the present invention is that it prevents the spread of smoke through a wall

Problems solved by technology

Prior art fails to provide a fire rated

Method used

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  • Adjustable size intumescent lined wall passthrough slot
  • Adjustable size intumescent lined wall passthrough slot
  • Adjustable size intumescent lined wall passthrough slot

Examples

Experimental program
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Example

[0027] In FIGS. 1-4, a fire rated wall passthrough slot device 20 for passing mail and paperwork 30 preferably into a collection box 32 through a pre-formed wall opening in a fire rated wall 40 is installed in two overlapping slot forming components 10A and 10B.

[0028] A series of slot surfaces 27, 28, 26A and 26B interconnect peripherally to form a passageway between the slot surfaces in the form of a slot 22 having an opening on each of two opposing ends of the slot roughly coinciding with each of the two sides of the wall 40. The slot 22 extends through the wall 40 from one side of the wall to the other side of the wall so that the slot acts as a passageway for mail and paperwork 30 passed through the opening in the wall from one side of the wall to the other side, of the wall.

[0029] At least one layer of intumescent material 24 is attached by edge flanges 11 (FIGS. 1 and 2) with the intumescent material 24 slid in from an open side or by an adhesive (FIGS. 3 and 4) or by pegs o...

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PUM

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Abstract

Two slot forming components overlay through a pre-formed wall opening to form an adjustable wall passthrough slot. At least one slot surface has an intumescent layer of material positioned out of the way of documents passing through the slot. Heat from a fire will expand the intumescent material to fill the slot and prevent the spread of fire. Two inclined top and bottom slot surfaces are positioned in parallel and spaced apart by the desired thickness of the slot. A smoke shield flap of flexible fabric material hangs down within the slot to prevent the passage of smoke through the slot while allowing documents to pivot or push the smoke shield flap aside.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to wall pass-throughs and particularly to a wall passthrough slot for mail and paperwork, such as a patient record and mail receptacle for a healthcare office or other use, comprising a fire-rated slot having a depository opening in one side of the wall and a file receiving box on the opposite side of the wall which is preferably an adjustable slot to fit various wall sizes and accommodate variously sized items passed through; the slot having a smoke shield flap and an intumescent fire-stopping material lining on at least one slot surface for sealing the slot responsive to a fire to prevent the spread of fire through the wall. [0003] 2. Description of the Prior Art [0004] Many fire-stopping devices are provided for electrical conduits that pass through walls. The devices prevent a fire from spreading through a wall where a hollow pipe or conduit passes through by using an intumescent ma...

Claims

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Application Information

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IPC IPC(8): E04B1/94
CPCA47G29/126F16L5/04E04B1/947A62C2/065
Inventor LACHANCE, MARC D.
Owner LACHANCE MARC D
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