Hose coupling for connection to a rigid tube connection, and method for making such a connection

A method of connecting an elastic hose to a rigid tube connection to form an arrangement in a fluid line, the arrangement comprising the hose made of an elastic material, the 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 inwardly-facing annular supporting surface being arranged so as to offer support to the end of the hose end at the tube connection, and a coupling comprising an inner ring having two end portions, wherein, the method includes steps of:

• prior to and in a mounting state, arranging for the two end portions of the inner ring to overlap so that the inner ring has a first diameter smaller than an inner diameter of the hose;
• and
• in a mounted state inside the hose in which the inner ring is opposite the inwardly facing supporting surface, pressing together the two end portions, end to end, to maintain the inner ring to have a second diameter larger than the first diameter to clamp the end of the hose end between the inner ring and the inwardly-facing supporting surface, wherein a cross section of the inner ring is arcuate to provide a recess and wherein the inwardly-facing supporting surface in the supporting member is correspondingly arched.