Fire barrie devices

Abstract

A fire barrier device ( 10 ) which is moulded integrally from a material comprising a heat reactive expandable material. The device ( 10 ) has a main body ( 11 ) which is shaped to retain the device in a concrete slab and which may have a part spherical outer wall ( 13 ) and a mounting portion ( 12 ) for mounting the device ( 10 ) to formwork defining one side of the slab. The main body ( 11 ) may include an annular groove or groves ( 14 ) to assist in retaining the device ( 10 ) in the slab.

1 . (Amended) A fire barrier device for use with pipes, ducts or conduits passing through a wall, floor or ceiling of a building, said device comprising a substantially annular main body portion adapted to be located about said pipe, duct or conduit, said body being moulded from a mouldable material containing a heat reactive expandable material, and wherein said moulded body comprises a self-supporting body.  
     
     
         2 . A fire barrier device according to  claim 1  wherein said mouldable material includes a carrier or plasticiser.  
     
     
         3 . A fire barrier device according to  claim 2  wherein said carrier or plasticiser comprises HDPE.  
     
     
         4 . (Amended) A fire barrier device according to  claim 1  wherein said heat expandable material comprises graphite.  
     
     
         5 . (Amended) A fire barrier device according to  claim 1  wherein said mouldable material includes a fire retardant.  
     
     
         6 . A fire barrier device according to  claim 5  wherein said fire retardant comprises sodium silicate.  
     
     
         7 . (Amended) A fire barrier device according to  claim 1  wherein said mouldable material includes a smoke suppressant.  
     
     
         8 . (Amended) A fire barrier device for use with pipes, ducts or conduits passing through a wall, floor or ceiling slab formed of a settable material, said device comprising a moulded main body, said main body being moulded from a mouldable material containing a heat reactive expandable material, said main body being self-supporting and having a passage therethrough for receipt of a said pipe, duct, or conduit, said main body being encased in use within said slab and being shaped such as to cooperate with said material of said slab and thereby be retained within said slab.  
     
     
         9 . A fire barrier device according to  claim 8  wherein said main body has a maximum transverse dimension at a position spaced in use from one side of the slab whereby to resist detachment of said main body from said one side of said slab.  
     
     
         10 . A fire barrier device according to  claim 9  wherein said main body is of substantially annular form to extend in use generally radially of the pipe, conduit or duct.  
     
     
         11 . A fire barrier device according to  claim 10 , wherein at least a portion of the outer surface of said main body is curved.  
     
     
         12 . (Cancelled)  
     
     
         13 . A fire barrier device according to  claim 9  wherein said main body has a stepped outer wall.  
     
     
         14 . A fire barrier device according to  claim 13  wherein said main body includes integrally formed retaining means adapted for cooperation and bonding with the material of the slab.  
     
     
         15 . A fire barrier device according to  claim 14  wherein said retaining means comprises an external groove in said body.  
     
     
         16 . A fire barrier device according to  claim 15  wherein said groove comprises a substantially annular groove.  
     
     
         17 . (Cancelled)  
     
     
         18 . (Amended) A fire barrier device according to  claim 8  wherein said main body has an axial bore therethrough for receipt of said pipe, conduit or duct, said axial bore having a first portion at one end of the main body and a second portion larger than the first portion at or adjacent the opposite end of the main body.  
     
     
         19 . (Cancelled)  
     
     
         20 . (Cancelled)  
     
     
         21 . (Amended) A fire barrier device according to  claim 18  and including mounting means integrally formed with said main body for mounting the device to formwork defining one side of the slab during the construction thereof.  
     
     
         22 . A fire barrier device according to  claim 21  wherein said mounting means includes a radially extending annular flange or lugs.  
     
     
         23 . (Cancelled)  
     
     
         24 . A fire barrier device according to  claim 22  wherein said mounting means includes between said main body and annular flange or lugs, a wall which is coaxial with said main body and formed integrally therewith with the main body extending radially outwardly of the wall.  
     
     
         25 . (Cancelled)  
     
     
         26 . (Cancelled)  
     
     
         27 . (Amended) A fire barrier device according to  claim 18  wherein said main body joins at its one end, a collar which is coaxial with said axial bore having an internal diameter substantially the same as said pipe, duct or conduit with which the device is to be used so as to firmly engage and support the pipe, duct or conduit during installation in a slab.  
     
     
         28 . (Cancelled)  
     
     
         29 . (Cancelled)  
     
     
         30 . (Cancelled)  
     
     
         31 . (Cancelled)  
     
     
         32 . (Cancelled)  
     
     
         33 . (Cancelled)  
     
     
         34 . (Cancelled)  
     
     
         35 . (Amended) A fire barrier device according to  claim 8  wherein said main body includes on its underside, a radially extending recess for accommodating radially extending lugs of a joining sleeve or fitting.  
     
     
         36 . (Cancelled)  
     
     
         37 . (Cancelled)  
     
     
         38 . (Cancelled)  
     
     
         39 . (Cancelled)