Coupling structure

A coupling structure for use in securing a pipe to a mounting member which has an opening located therein, said structure consisting essentially of:

• a pipe having a threaded end, a tapered, conical shoulder located concentrically around said pipe adjacent to said end, said shoulder diverging away from said end a cylindrical enlargement adjacent said shoulder and means for engaging said end of said pipe by a spanner tool,
• an elastomeric sleeve fitting around said end adjacent to said shoulder, said sleeve having an outwardly extending flange located on its extremity remote from said shoulder and having an internal taper within the end thereof remote from said flange, said taper fitting against said shoulder, said sleeve having an external diameter substantially equal to the external diameter of said enlargement, said diameters being slightly less than the diameter of the opening in said member and
• nut means threaded on said end and engaging said flange,
• said pipe and said sleeve being capable of being inserted through said opening from one side of said member so that said flange fits against said side of said member and so that said pipe extends from the other side of said member,
• when so inserted said pipe being capable of being manipulated as the result of engagement of said nut and said engaging means so as to cause movement of said nut toward said shoulder, such movement causing movement of said sleeve into engagement with said shoulder, such engagement causing expansion of said sleeve to a sufficient extent for said sleeve to engage said other side of said member and also to engage a portion of the external surface of said enlargement so as to hold said pipe against linear movement relative to said member.