Patent ID: 7318582

Claim:
An assembly bearing with hydraulic damping for supporting engines and/or gear-boxes in motor vehicles, comprising: a working chamber and a compensation chamber, said working chamber and said compensation chamber having partially elastically deformable walls and being separated by a dividing wall; a damping channel through which a liquid is guided, said damping channel interconnecting said working chamber and said compensation chamber; and an additional passage opening formed by a peripherally extending conical surface disposed in said working chamber and by a lowering plate of adjustable height, said lowering plate being disposed in said working chamber in correspondence with said conical surface and adjustable from outside of the assembly; wherein said dividing wall includes an upper membrane cage and a lower membrane cage sandwiching a membrane for isolating high-frequency, low-amplitude vibrations; said additional passage opening is disposed upstream of said membrane: and said lowering plate is formed of an axially movable shifting rod disposed essentially centrally in the assembly and guided through a corresponding central opening, through said membrane, through said compensation chamber, and extending entirely into said working chamber, said lower membrane cage fixedly mounted and axially movable with said shifting rod.