Patent ID: 7748749

Claim:
A decoupling element, comprising: first and second axial fittings; a multi-layer spiral-wound metal hose pervious to gas and having terminal ends which are immovably connected to the first and second fittings, respectively, while allowing the metal hose to undergo a torsional movement; a tube in the form of a bellows accommodated in coaxial relationship to the metal hose and having one end immovably connected to one of the first and second fittings and another end radially secured to the other one of the first and second fittings without inhibiting a movement of the tube in axial and torsional directions; and an annular element radially securing the tube to the other one of the first and second axial fittings, wherein the tube is movably mounted in the other one of the first and second axial fittings by the annular element in such a way as to render the decoupling element effectively liquid-tight, pervious to gas, and capable to move in axial and torsional directions.