Fluid-filled cylindrical elastic mount having movable member in fluid chamber

A fluid-filled cylindrical elastic mount having an inner and an outer sleeve which are disposed in mutually spaced-apart relation with each other, and an elastic body interposed between the inner and outer sleeves so as to elastically connect the inner and outer sleeves, wherein the improvement comprises:

• said elastic body at least partially defining a fluid chamber located between said inner and outer sleeves in a load-receiving direction in which a vibrational load is applied to the elastic mount, said fluid chamber being filled with a non-compressible fluid having a predetermined value of viscosity;
• said elastic body including a thin-walled portion which partially defines said fluid chamber and which elastically yields to permit said fluid chamber to be elastically deformed upon application of the vibrational load in said load-receiving direction;
• a movable member accommodated in said fluid chamber such that the movable member is freely movable over a predetermined distance within said fluid chamber in said load-receiving direction;
• and
• said movable member and inner surfaces of said fluid chamber cooperating with each other to define resonance portions having a predetermined radial depth as measured in said load-receiving direction.