Patent ID: 7055868
Filing Date: 2006-06-06
Classification: F16L,Y10S

Abstract:
1. A fitting for an end of a length of tubing having corrugations ranging between a maximum and a minimum diameter for terminating the tubing at an end section, said fitting comprising: a retainer having at least one ridge sized to extend inwardly to a radius between said maximum and minimum diameters for gripping said tubing axially above an endmost corrugation of said tubing and an axially oriented inwardly facing surface to seal against the tubing; a body having a threaded surface and a hollow cylindrical part sized to admit said retainer; a nut having thread complementary with said threaded surface of said body, said nut having a cap part configured to engage said retainer for urging said retainer axially toward said body with threaded advance of said nut relative to said body; and, said body having an annular groove therein, said annular groove bounded inwardly by a tubular stub with an axially oriented outwardly facing sealing surface, and wherein said advance of said nut on said body folds said end section of the corrugated tubing over itself and forms said end section into a seal body by sliding the folded said end section between the retainer and the tubular stub, the seal body comprising a pair of substantially parallel axially disposed sealing surfaces between said axially oriented inwardly facing surface of the retainer and said axially oriented outwardly facing sealing surface of the tubular stub.