Fire block conduit coupler
AssigneeRoyal Group Technologies Limited
InventorsBrian M. Didone, Manfred Harle
Life of this patent
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Abstract
A coupler which is used in coupling plastic conduit through a separation in a building has plastic end regions for an overlapped accurately positioned sealed coupling with the plastic conduit to each end of the coupler. The plastic end regions are separated by an intermediate region formed by a wall of plastic based intumescent material which defines a fluid flow passage through the coupler. The fluid flow passage wall has a sufficient thickness of the intumescent material to produce a complete blockage of the passage when the coupler is subjected to conditions which cause an intumescing of the intermediate region wall material.
Claims16
A coupler having plastic end regions for an overlapped accurately positioned sealed coupling with plastic conduit to each end of said coupler, said plastic end regions being separated by an intermediate region formed by a wall of plastic based intumescent material defining a fluid flow passage through said coupler, said wall having a sufficient thickness of the intumescent material to produce a complete blockage of the passage when the coupler is subjected to conditions which cause an intumescing of the material.
A conduit system including first and second conduits coupled by a coupler passing through an opening in a fire rated separation of a building, said conduits being made from a plastic material and said coupler being made from an intumescent material including the same plastic material as that from which the conduits are made, said conduit system including collared end stops to opposite ends of said coupler which provide accurate location of said conduits with said coupler and where said coupler and conduits are solvent welded to one another, the intumescent material of said coupler being free to intumesce internally of said coupler to block off said conduit system and to intumesce externally of said coupler to block off the opening in the separation.
A conduit system as claimed in claim 14 wherein said coupler has an internal flow passage approximating that said of conduits.
Dependencies are inferred from the claim text.