Hydraulically damped mounting device

Claim 1

A hydraulically damped mounting device having first anchor and a second axial anchor, for damping vibrations in direction orthogonal to said second anchor comprising: a hollow sleeve formed at said first anchor; second anchor formed within said sleeve, said second anchor extending axially of said sleeve, said sleeve and said second anchor defining a space extending radially from said second anchor to said sleeve; a resilient wall within said space connecting said sleeve and said second anchor and thereby subdividing said space into two pockets, said resilient wall being adapted to be compressed in a predetermined direction when a load is applied to the hydraulically damped mounting device; a working chamber in one pocket of said space and enclosed between said sleeve and said resilient wall, said working chamber containing a liquid; a bellows wall of corrugated material withing said space in the other of said pockets; a compensation chamber within said space bounded, at least in part, by said bellows wall; and an open passageway connecting said working chamber and said compensation chamber to allow fluid communication of said liquid between said working chamber and said compensation chamber; said working chamber is physically separate from said bellows wall and having substantial different spring characteristics, thereby effectively separating the spring effect of the device from the damping effect thereof with the spring effect substantially determined by the resilient wall and the damping effect substantially determined by the flow characteristics of the passageway, and at least parts of said bellows wall remote from said second anchor point are physically separate from said resilient wall.