Feodor Burgmann Dichtungswerke Gmbh & Co.

Dietmar Morgner

Hans Deinhard

Werner Friess

Christian Vogt

Harald Jahnel

A vibration decoupling device for use in exhaust systems of internal combustion engines, comprises a pair of axially spaced conduit connecting members connected with each other by a bellows-type connecting element, and a force transmitting means having at least axial elasticity for transferring forces between said conduit connecting members. The force transmitting means comprises a housing surrounding said bellows-type connecting element, said housing being connected near at least one axial end thereof to an adjacent conduit connecting member by an articulated spring assembly comprising one or more independent spring means. Each spring means comprises at least one leaf spring element and has three force transmitting portions. An intermediate portion of each spring means is connected without clearance to the conduit connecting member and each spring means is connected at one of its two end portions, likewise without clearance, to the housing, whilst the other end portion may be supported by the housing such that there is freeplay in the circumferential direction of the decoupling device. The spring means may overlap one another at their end portions, and together, they form a ring-like space-saving configuration around the corresponding conduit connecting member. The connections are preferably produced without rivets, pins or welding and they present practically no hindrance to the bending of the spring means. Due to the freedom from play, the transfer of torsional forces from the conduit connecting member to the housing can occur without involving the bellows-type connecting element. The housing may be of tubular construction with no projecting parts.

Conduit vibration decoupling device for use in exhaust systems

A conduit vibration decoupling device, particularly for exhaust systems of internal combustion engines, comprises a pair of axially spaced conduit connecting members connected with each other by a flexible, bellows-type connecting element, and a force transmitting means having at least axial elasticity for transferring forces between said conduit connecting members. The force transmitting means comprises a housing surrounding said. flexible connecting element and connected to at least one of the conduit connecting members by an articulated spring arrangement which comprises at least a pair of spring means circumferentially spaced from each other. Each spring means consists of at least a single leaf-type spring element which a) extends in a substantially radial plane of the decoupling device, b) is supported at the end portions thereof with axial clearance at portions of said housing circumferentially spaced from each other, c) is prevented from moving in a circumferential direction with respect to a longitudinal centerline, and d) engages at an intermediate portion thereof a recess formed in said conduit connecting member and oriented to said spring element. The spring means during movement of said conduit connecting member relative to said housing engages portions of said conduit connecting member defining the recess for transmitting a force therebetween.

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München, Germany

Dietmar Morgner