Patent ID: 7350822

Claim:
A lip coupling for connecting together two pieces of pipe above a hole in the floor, the coupling comprising a semi-spherical upper portion having an outer spherical surface and connecting with a lower cylindrical portion having a lower internal bore for receiving a first pipe therein, the semi-spherical upper portion being formed from a truncated semi-spherical member having a flat top in which an upper internal bore is provided for receiving a second pipe therein and the upper portion having a generally transverse bottom provided with a radially outwardly directed lip which is adapted to rest against the floor surrounding the hole, the spherical surface of the semi-spherical portion curving gradually downwardly and outwardly from an outer edge of the flat top of the upper portion to an outer edge of the bottom thereof where it becomes the lip, the lip having an underside which is provided with a curved and upwardly directed recess which extends between an outer edge of the lip and the lower cylindrical portion to prevent any unnecessary contact between the lip and any irregularity on the surface surrounding the hole, the material thickness of the semi-spherical portion, as represented by the distance from the outer edge of the lip to the upper bore, is greater than that of the lower cylindrical portion.