Patent ID: 7452009

Claim:
A coupling arrangement for connecting an elastic hose and a rigid tube connection in a fluid line, comprising: a hose made of an elastic material; a rigid tube connection having a peripheral, rigid rim to which an end of the hose is adapted to be connected, and at least one rigid supporting member with a radially inward facing annular supporting surface being arranged so as to offer support to the hose end at the tube connection; and a coupling comprising an inner ring having two end portions, wherein, prior to and in a mounting state, the two end portions of the inner ring are adapted to overlap so that the inner ring has a first diameter smaller than an inner diameter of the hose and wherein, in a mounted state inside the hose in which the inner ring is opposite the inward facing supporting surface, the two end portions are adapted to be pressed together, end to end, to maintain a second diameter larger than the first diameter to clamp the hose end between the inner ring and the inward facing supporting surface, wherein a cross section of the inner ring is substantially arcuate and wherein the inward facing supporting surface in the supporting member is correspondingly arched.