Patent ID: 6082717
Filing Date: 2000-07-04
Classification: F16F

Abstract:
A fluid-filled vibration damping device comprising:a first and a second mounting member which are spaced apart from each other;an elastic body elastically connecting said first and second mounting members and partially defining at least one pressure-receiving chamber each of which is filled with a non-compressible fluid, said elastic body being elastically deformed so as to cause a change in a pressure of said fluid in said each pressure-receiving chamber, upon application of a vibrational load between said first and second mounting members;a movable member exposed directly to and partially defining at least one of said at least one pressure-receiving chamber and movable relative to said first and second mounting members;said movable member partially defining a working air chamber on one of opposite sides thereof which is remote from the corresponding pressure-receiving chamber, said movable member being oscillatable by a periodic change of an air pressure in said working air chamber, so as to cause a periodic change of a volume of said corresponding pressure-receiving chamber and a periodic change of the pressure of said fluid in said corresponding pressure-receiving chamber;means for defining a pressure inlet through which said air pressure is applied to said working air chamber; anda pressure control device connected to said working air chamber through said pressure inlet, for changing the air pressure in said working air chamber in synchronization with a frequency of a vibrational load to be damped by the damping device.