Decoupling element impervious to liquid fluids
AssigneeWestfalia Metallschlauchtechnik GmbH & Co. KG
InventorsDietmar Baumhoff, Frank Bender, Karl-Heinz Münker, Stefan Hauk, Matthias Weiss
Life of this patent
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Abstract
For connection of pipelines which are subject to vibration, for example pipelines in vehicle exhaust systems, a liquid-tight decoupling element is used which includes a, e.g. multi-layer wound, metal hose and a tube accommodated in coaxial relationship inside or outside of the metal hose. A first axial fitting firmly secures one end of the tube. The tube is sized to protrude into a second axial fitting, regardless whether the metal hose is completely compressed or completely stretched, to allow movement of the tube in axial and torsional directions in relation to the second axial fitting.
Claims14
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.
Dependencies are inferred from the claim text.