Patent ID: 7396050

Claim:
A coupling device for an electropump having a delivery duct to be connected to a washing tank of a dishwasher, wherein the coupling device integrally comprises: a first substantially cylindrical tang for connection to the delivery duct; a second substantially cylindrical tang for connection to the washing tank; a frustum of cone-shaped section, intermediate said first and said second tang, said frustum having its smallest diameter end adjacent said second tang and having its largest diameter end adjacent said first tang, such that the conicity of the frustum faces in the direction of water flow from the first tang to the second tang; a flexible annular lip formed between said second tang and said smallest diameter end of said frustum, said flexible annular lip extending outwardly from an external wall of said coupling device to dampen axial vibrations in the coupling device; and stiffening annular ribs arranged on the external wall of said frustum of cone-shaped section, an internal wall of said frustum of cone-shaped section that is interior to said stiffening annular ribs being generally smooth.