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US 7,195,290 B2Granted
Apparatus for a fire-rated duct
OwnerWilliam Christopher Duffyinventor
Life of this patent
Estimating the term…
Abstract
A duct system comprising duct sections which are factory manufactured and field modifiable. The field modifiable duct system comprises fire resistant materials and is fire-rated. The duct sections when assembled create a continuous conduit that allows air to flow from a fresh air source to the required area of the building.
Claims16
A duct assembly suitable for fire-rated applications, said duct assembly comprising:
- a liner section having an inner surface and an outer surface and a first end and a second end, and said liner section being formed from a thin steel material;
- a non-combustible layer, said non-combustible layer being attached to and surrounding the outer surface of said liner section;
- a flange assembly for the first end of said liner section, said flange assembly being removably coupled to said first end;
- another flange assembly for the second end of said liner section, said flange assembly being removably coupled to said second end;
- at least one longitudinal member having a first end for connecting to said flange assembly and a second end for connecting to said other flange assembly, and having a surface for securing a portion of said non-combustible layer and said liner section;
- a fire-resistant sealant applied to joints between said liner section and said flange assemblies to prevent the flow of air from the inner surface of said liner section to exterior of said duct assembly;
- and
- wherein one or both of said flange assemblies are coupled to said liner section during fabrication at a factory.
5 more elements
A fire-rated duct assembly comprising:
- an inner duct liner having a first end, a second end, an inner surface and an outer surface;
- at least one fire-resistant panel, said at least one fire-resistant panel being attached to the outer surface of said inner duct liner using one or more fasteners;
- a first end connector member and fasteners therefor, said fasteners coupling said end connector member to one end of said inner duct liner and said at least one fire-resistant panel;
- a second end connector member and fasteners therefor, said fasteners coupling said second end connector member to said second end of said inner duct liner and said at least one fire-resistant panel;
- a plurality of longitudinal connector members having a first end and fasteners therefor for connecting to said first end connector member and a second end and fasteners therefor for connecting to said second end connector member, and having a surface for securing a portion of said at least one fire-resistant panel and fasteners therefor;
- wherein said connector members, said inner duct liner and said at least one fire-resistant panel are assembled at a factory so that said duct assembly is shipped as a unit.
3 more elements
A fire-rated duct assembly comprising:
- a rectangular inner duct liner having a first end, a second end, an inner surface and an outer surface;
- a plurality of fire-resistant panels, each of said fire-resistant panels being attached to one side of the outer surface of said rectangular inner duct liner using one or more fasteners;
- a first flanged connector member and fasteners therefor, said fasteners coupling said first flanged connector member to one end of said rectangular inner duct liner and said fire-resistant panels;
- second flanged connector member and fasteners therefor, said fasteners coupling said second flanged connector member to the second end of said rectangular inner duct liner and said fire-resistant panels;
- a plurality of longitudinal connector members having a first end and fasteners therefor for connecting to said first flanged connector member and a second end and fasteners therefor for connecting to said second flanged connector member, and having a surface for securing a portion of said fire-resistant panels;
- one of said flanged connector members including a fastening mechanism for connecting one or more of said duct assemblies at a field site;
- a fire-resistant sealant applied to said inner duct liner and said fire-resistant panels to seal said inner duct liner from air flow exterior to the duct assembly;
- and
- wherein said flanged connector members, said rectangular inner duct liner and said fire-resistant panels are assembled at a factory so that said duct assembly is shipped as a unit to the field site.
6 more elements
A duct assembly for providing a fire-rated conduit, said duct assembly comprising:
- an inner duct liner having a first end, a second end, an inner surface and an outer surface, and said inner duct liner being formed from a thin steel sheet;
- at least one fire-resistant panel, said at least one fire-resistant panel being attached to the outer surface of said inner duct liner using one or more fasteners;
- a first connector member and fasteners therefor, said fasteners coupling said connector member to one end of said inner duct liner and said at least one fire-resistant panel;
- a second connector member and fasteners therefor, said fasteners coupling said second connector member to the second end of said inner duct liner and said at least one fire-resistant panel;
- a plurality of longitudinal connector members having a first end and fasteners therefor for connecting to said first connector member and a second end and fasteners therefor for connecting to said second connector member, and having a surface for securing a portion of said fire-resistant panel;
- wherein said connector members, said inner duct liner and said fire-resistant panels are formed into an assembly at a factory, said assembly being shipped as a unit;
- and
- wherein said assembly forms a conduit section.
5 more elements
Dependencies are inferred from the claim text.