Fluid-filled damping device having a large spring stiffness values in two mutually perpendicular diametric directions

A fluid-filled damping device comprising:

• a center shaft member;
• an outer cylindrical member disposed radially outwardly of said center shaft member;
• a first and a second elastic end wall each having a generally annular shape, for elastically connecting said center shaft member and said outer cylindrical member at axially opposite end portions thereof, said first elastic end wall having a pair of recesses which are opposed to each other in a first diametric direction of said center shaft member;
• a generally annular elastic intermediate wall disposed between said first and second elastic end walls and cooperating with said first elastic end wall to define an annular void between said first elastic end wall and said elastic intermediate wall;
• a pair of partition blocks which are disposed between said second elastic end wall and said elastic intermediate wall such that said partition blocks are opposed to each other in a second diametric direction perpendicular to said first diametric direction, said partition blocks cooperating with said second elastic end wall and said elastic intermediate wall to define a first pocket and a second pocket which are opposed to each other in said first diametric direction;
• said elastic intermediate wall, said second elastic end wall and said partition blocks being formed as an integral structure separate from said first elastic end wall, said integral structure being secured at an inner circumferential surface thereof to said center shaft member;
• a first intermediate sleeve fitted on an outer circumferential surface of said integral structure, said first intermediate sleeve having a pair of windows through which said first and second pockets are open;
• said outer cylindrical member being fitted on said first intermediate sleeve such that said outer cylindrical member closes said annular void, thereby cooperating with said first elastic end wall to define a first fluid chamber, and also closes said pair of windows, thereby cooperating with said elastic intermediate wall, said second elastic end wall and said partition blocks to define a second and a third fluid chamber which correspond to said first and second pockets, respectively, said first, second and third fluid chambers being filled with a non-compressible fluid;
• and
• means for defining a first orifice for fluid communication between said first and second fluid chambers and a second orifice for fluid communication between said first and third fluid chambers.