Drain assembly for drain pipe

Claim 1

A drain assembly useful for connecting a basin liner having an opening therein, which comprises a drain pipe having an outwardly extending flange thereon; a resilient, annular drain pipe liner having an encircling lip with a compressible, cylindrical member extending therefrom, a portion of said cylindrical member being received within said drain pipe, said portion having a radially reduced internal diameter portion of smaller inner diameter than the inner diameter of said cylindrical member adjacent said lip and having an internal tapered sidewall portion immediately adjacent said reduced diameter portion; a rigid sleeve having an annular rim at one end, said sleeve having an outer diameter larger than the inner diameter of said reduced diameter portion and said tapered sidewall portion, said sleeve adapted to be inserted through said opening in said basin liner so that said basin liner is positioned between said rim and said encircling lip on said drain pipe liner, and further, said sleeve being received within said reduced diameter portion of said cylindrical member whereby said drain pipe liner is radially compressed between said sleeve and said drain pipe to provide a relatively concentrated residual stress which radially grips the sleeve to prevent pullout thereof and to enhance the sealing relationship with respect to the drain pipe; and an internally threaded nut threadably receiving said drain pipe liner for adjustably positioning said encircling lip adjacent said basin liner and for adjustably positioning said drain pipe liner longitudinally within said drain pipe, said nut being in registration with and overlying said flange.