Telescoping tube assembly

Claim 1

An assembly for maintaining a fluid pressure seal between rigid telescoping conduit tubes, said assembly comprising a flange nut, a round flange, a ring collar and elastomeric annular seals located and positioned coaxially around said tubes, said flange nut having an axial bore with interior threads for mating engagement with said round flange, an annular recess for movably enclosing the body portion of said ring collar, and a radially directed surface for positioning engagement with said ring collar, said round flange being secured coaxially to one end of the larger diameter tube and having peripheral threads thereon for mating engagement with interior threads of said flange nut and an axially outwardly opening recess therein housing an elastomeric seal, said ring collar having an interior bore surface slidably seated coaxially around the smaller diameter tube and having a radially inwardly opening annular recess therein housing an elastomeric seal, the body portion of said ring collar having a radial extent less than the inner diameter of said annular recess in the bore of the flange nut and sufficient to overlay said recess in said round flange housing an elastomeric seal, whereby, said flange nut will enclose and position said ring collar in fluid pressure sealing relation to said round flange and said elastomeric seals, while permitting limited radial movement of said telescoping tubes.