Patent ID: 6237963
Filing Date: 2001-05-29
Classification: F16L

Abstract:
A riser comprising:a plastics pipe sealed inside a protective tube intermediate the ends thereof;a retainer sleeve and compression band on the end of the pipe between them compressing the wall of the pipe and retaining and sealing the sleeve on the pipe, wherein the retainer sleeve is a single, integral piece and extends from the end of the pipe; andan elastomeric band on the retainer sleeve beyond the end of the pipe and compressed against the sleeve by a swaging of the tube; wherein the sleeve has at least one circumferential step overlapped by the elastomeric band so that the elastomeric band is compressed to different degrees on either side of the step, and the material of the elastomeric band has an ideal compression degree for optimum sealing conditions between two objects, wherein the elastomeric band is compressed to a first, small degree on one side of the step and to a second, larger degree on the other side of the step, the ideal compression degree ling between said first and second degrees for all size tolerances of said sleeve, elastomeric band, and tube.