Patent ID: 7472719

Claim:
A drainage device for arrangement on a floor tile having an aperture for drain water, comprising an upper inlet aperture into which drain water, having passed through the aperture in the floor tile can enter, parts preassembled in the floor area, which can be connected to a drainage pipe so that drain water, having passed through the inlet aperture, can pass into the drainage pipe, two parts, which when assembled at least partially in the floor area are moveable relative to one another, in such a way that their movement relative to one another allows the aperture in the floor tile to be moved in relation to the parts preassembled in the floor area, wherein the parts of the drainage device moveable relative to one another take the form of pipe lengths or tubular sections arranged at least partially one inside the other, which enclose a deformable annular space or partially annular space between them and wherein the inner pipe length or the inner tubular section has an upper flange extending radially outwards, which is supported so that it is horizontally moveable and wherein the flange of the outer pipe length or the outer tubular section is bent upwards and radially inwards at its radially outer end, so that the bend thereby produced is arranged at least partially above the flange of the inner pipe length or the inner tubular section.