초록 ▼

A pipe coupling assembling for use with a pipe having an inner wall, an outer wall and an interstitial space between the walls, with the pipe terminating in a coupling end defining an axial direction. The assembly includes a ferrule attached to the outer wall. The ferrule has an outer annular ring a

A pipe coupling assembling for use with a pipe having an inner wall, an outer wall and an interstitial space between the walls, with the pipe terminating in a coupling end defining an axial direction. The assembly includes a ferrule attached to the outer wall. The ferrule has an outer annular ring and an interstitial channel aligned with the interstitial space in the pipe for presenting an interstitial chamber. An insert is attached to the inner wall. The insert also has an inner annular ring. An externally threaded transition fitting is removed for attachment to the ferrule. The fitting includes an interstitial channel aligned with the interstitial chamber, an outer seal channel for sealing engagement with the outer annular ring, and an inner seal channel for sealing engagement with the inner annular ring. Finally, a coupling is keyed to the ferrule including internal threads for engagement with the fitting to provide coupling engagement between both the ferrule and the insert with the fitting.

대표청구항 ▼

[ Having thus, described the invention, what is claimed is:] [1.] A pipe coupling assembly, comprising:a pipe having an inner wall, an outer wall and an interstitial space between said walls, said pipe terminating in a coupling end defining an axial direction;a ferrule attached to said outer wall at

[ Having thus, described the invention, what is claimed is:] [1.] A pipe coupling assembly, comprising:a pipe having an inner wall, an outer wall and an interstitial space between said walls, said pipe terminating in a coupling end defining an axial direction;a ferrule attached to said outer wall at said end, said ferrule having an outer annular ring extending from said coupling end in said direction and further having an interstitial channel aligned with said interstitial space in said pipe for presenting an interstitial chamber at said coupling end;an insert attached to said inner wall at said end, said insert having an inner annular ring extending from said coupling end in said direction;an externally threaded transition fitting for attachment to said ferrule, said fitting including an interstitial channel aligned with said interstitial chamber, an outer seal channel for sealing engagement with said outer annular ring, and an inner seal channel for sealing engagement with said inner annular ring; andcoupling means keyed to said ferrule to prevent removal thereof in said direction and including internal threads for engagement with said fitting to provide coupling engagement between said ferrule and insert with said fitting.