Fire stop pipe coupling adaptor

Claim 1

A fire-stop pipe coupling adaptor comprising: a pipe coupling having an elongated tubularly-shaped main body with first and second ends, said elongated tubularly-shaped main body having an inner surface and an outer surface, said elongated tubularly-shaped main body including first and second coupling means respectively at said first and second ends for respectively coupling said first and second ends to first and second pipes separate from said pipe coupling; an intumescent fire-stop collar wrapped about and attached to the outer surface of said tubularlyshaped main body, said intumescent collar being constructed of a material which expands when it gets hot to close off the inner surface of said tubularlyshaped main body; a closed tubularly-shape-d metallic band wrapped about and attached to a circumferential periphery of said intumescent collar; and a metallic-band tab attached to a first end of said tubular band adjacent said first end of said elongated tubularly-shaped main body and extending radially outwardly therefrom for receiving attaching fasteners for attaching said metallic band to a partition; wherein said first coupling means is a short male tube for extending int-o an end of a female coupling of said first pipe but allowing the end of said first pipe to be positioned immediately adjacent said intumescent fire-stop collar and-said metallic band tab when said first coupling means is coupled to said first pipe; whereby said first-stop pipe coupling can be coupled to said female coupling of said first pipe when said first pipe is embedded in a partition by inserting the first coupling means into said female coupling and fastening said metallic-band tab to an outer surface of said partition, thereby allowing said second pipe to be attached to said second coupling means and creating a fire stop at the partition in the pipe string thereby created.

Claim 7

A method of preparing a pipe string through a partition with a fire stop at said partition to prevent a fire on one side of the partition from spreading to the other side of the partition, said method comprising the steps of: casting a cast-in pipe coupling in said partition with one end of said pipe coupling opening to one side of the partition and the other end of said pipe coupling opening to the other side of said partition, said one end of said pipe coupling forming a female bell for receiving a male pipe coupling; coupling to said one end of said cast-in coupling a fire-stop pipe coupling adaptor comprising a pipe coupling having an elongated tubularly-shaped main body with first and second ends, said elongated tubularly-shaped main body having an inner surface and an outer surface, said elongated tubularly-shaped main body including first and second coupling means respectively at said first and second ends for respectively coupling said first end to said cast-in coupling and said second end to a second pipe separate from said pipe coupling, said fire-stop pipe coupling adaptor further comprising an intumescent fire-stop collar wrapped about and attached to the outer surface of said tubularly-shaped main body, said intumescent collar being constructed of a material which expands when it gets hot to close off the inner surface of said tubularly-shaped main body, and said fire-stop pipe coupling adaptor further comprising a closed tubularly-shaped metallic band wrapped about and attached to a circumferential periphery of said intumescent collar including a metallic-band tab attached to a first end of the tubular band adjacent the first end of said elongated tubularly-shaped main body and extending radially outwardly therefrom for receiving attaching fasteners for attaching said metallic band to a partition, said first coupling means being a short male tube which, in this step, is coupled to said cast-in pipe coupling by extending into said female bell at said one end of said cast-in pipe coupling but leaving the end of said cast-in pipe coupling positioned immediately adjacent said intumescent fire-stop collar and said metallic band tab; attaching said metallic-band tab to said partition by driving said attaching fasteners through said tab into said partition; and attaching a second pipe to said second end of said pipe coupling main body.

Claim 8

A method of preparing a pipe string through a partition with a fire stop at said partition to prevent a fire on one side of the partition from spreading to the other side of the partition, said method comprising the steps of: casting a cast-in pipe coupling in said partition with one end of said pipe coupling opening to one side of the partition and the other end of said pipe coupling opening to the other side of said partition, said one end of said pipe coupling forming a female bell for receiving a male pipe coupling; coupling to said one end of said cast-in coupling a fire-stop pipe coupling adaptor comprising a pipe coupling having an elongated tubularly-shaped main body with first and second ends, said elongated tubularly-shaped main body having an inner surface and an outer surface, said elongated tubularly-shaped main body including first and second coupling means respectively at said first and second ends for respectively coupling said first end to said cast-in coupling and said second end to a second pipe separate from said pipe coupling, said fire-stop pipe coupling adaptor further comprising an intumescent fire-stop collar wrapped about and attached to the outer surface of said tubularly-shaped main body, said intumescent collar being constructed of a material which expands when it gets hot to close off the inner surface of said tubularly-shaped main body, and said fire-stop pipe coupling adaptor further comprising a closed tubularly-shaped metallic band wrapped about and attached to a circumferential periphery of said intumescent collar including a metallic-band tab attached to a first end of the tubular band adjacent the first end of said elongated tubularly-shaped main body and extending radially outwardly therefrom for receiving attaching fasteners for attaching said metallic band to a partition, said first coupling means being a short male tube which, in this step, is coupled to said cast-in pipe coupling by extending into said female bell at said one end of said cast-in pipe coupling but leaving the end of said cast-in pipe coupling positioned immediately adjacent said intumescent fire-stop collar and said metallic band tab; attaching said metallic-band tab to said partition by driving said attaching fasteners through said tab into said partition; and attaching a second pipe to said second end of said pipe coupling main body.