Fluid-filled elastic mount including resonance member disposed in fluid chamber and having fluid passages between spaced-apart inner and outer portions

A fluid-filled elastic mount including (a) a first and a second mounting member which are spaced apart from each other in a load-receiving direction in which a vibrational load is primarily applied to the fluid-filled elastic mount, (b) an elastic body which elastically connects said first and second mounting members and which partially defines a fluid-tight space filled with a non-compressible fluid, (c) a resonance member which is supported by said first mounting member and which has an outer portion cooperating with an inner surface of said fluid-tight space to define an annular restricted fluid passage, said resonance member substantially dividing said fluid-tight space into two sections which are arranged in said load-receiving direction and which communicate with each other through said annular restricted fluid passage, and (d) a stop portion provided on said second mounting member such that said outer portion of said resonance member is abuttable on said stop portion to limit an amount of relative displacement of said first and second mounting members in said load-receiving direction, wherein an improvement comprises:

• said resonance member comprising an inner portion fixed to said first mounting member, an annular portion as said outer portion abuttable on said stop portion, and an intermediate portion interposed between said inner and annular portions, said intermediate portion including a plurality of connectors connecting said inner and outer portions such that said inner and outer portions are spaced apart from each other in said load-receiving direction;
• and
• said intermediate portion having a surface area which is not smaller than a half of an entire surface area of said resonance member, said intermediate portion having a plurality of windows which are separated from each other by said connectors and which function as fluid passages in addition to said annular restricted fluid passage, said fluid passages which correspond to said windows having a total area of fluid communication therethrough, which total area is not smaller than three quarters of said surface area of said intermediate portion.