Method of manufacturing fluid-filled elastic mount having fluid injection hole for filling pressure-receiving and equilibrium chambers

A fluid-filled elastic mount including an elastic body flexibly connecting an inner and an outer sleeve which are radially spaced apart from each other, means for defining a pressure-receiving chamber and a variable-volume equilibrium chamber which are formed between the inner and outer sleeves and which are filled with a non-compressible fluid, and means for defining an orifice passage for fluid connection between the pressure-receiving and equilibrium chambers, said pressure-receiving chamber undergoing pressure changes due to elastic deformation of said elastic body upon application of a vibrational load, said equilibrium chamber being defined partially by a rigid member and partially by a flexible diaphragm which permits volumetric changes of the equilibrium chamber, said fluid-filled elastic mount comprising:

• at least one injection hole which is formed through said rigid member partially defining said equilibrium chamber, and through which said non-compressible fluid is injected into said equilibrium chamber, said orifice passage and said pressure-receiving chamber, said at least one injection hole being open on an outer surface of the elastic mount other than an outer circumferential surface of said outer sleeve;
• and
• at least one closure member for fluid-tightly closing said at least one injection hole upon completion of filling of the equilibrium chamber, the orifice passage and the pressure-receiving chamber with said non-compressible fluid.

A method of manufacturing a fluid-filled elastic mount which includes an elastic body flexibly connecting an inner and an outer sleeve which are radially spaced apart from each other, means for defining a pressure-receiving chamber and a variable-volume equilibrium chamber which are formed between the inner and outer sleeves, are spaced apart from each other in circumferential direction of the mount, and are filled with a non-compressible fluid, and means for defining an orifice passage for fluid connection between the pressure-receiving and equilibrium chambers, said pressure-receiving chamber undergoing pressure changes due to elastic deformation of said elastic body upon application of a vibrational load, said equilibrium chamber being defined partially by a flexible diaphragm which permits volumetric changes of the equilibrium chamber, comprising the steps of:

• preparing a mount body having said pressure-receiving chamber, said equilibrium chamber and said orifice passage, and including a rigid member which cooperates with said flexible diaphragm to define said equilibrium chamber;
• forming at least one injection hole through said rigid member partially defining said equilibrium chamber, such that said at least one injection hole is open on an outer surface of the elastic mount other than an outer surface of said outer sleeve;
• injecting said non-compressible fluid through said at least one injection hole, into said equilibrium chamber, said orifice passage and said pressure-receiving chamber;
• and
• fluid-tightly closing said at least one injection hole upon completion of filling of the equilibrium chamber, the orifice passage and the pressure-receiving chamber with said non-compressible fluid.

A fluid-filled elastic mount including an elastic body flexibly connecting an inner and an outer sleeve which are radially spaced apart from each other, means for defining a pressure-receiving chamber and a variable-volume equilibrium chamber which are formed between the inner and outer sleeves, are spaced apart from each other in a circumferential direction of the mount, and are filled with a non-compressible fluid, and means for defining an orifice passage for fluid connection between the pressure-receiving and equilibrium chambers, said pressure-receiving chamber undergoing pressure changes due to elastic deformation of said elastic body upon application of a vibrational load, said equilibrium chamber being defined partially by a flexible diaphragm which permits volumetric changes of the equilibrium chamber, said fluid-filled elastic mount comprising:

• at least one injection hole formed through said rigid member partially defining said equilibrium chamber, and through which said non-compressible fluid is injected into said equilibrium chamber, said orifice passage and said pressure-receiving chamber, said at least one injection hole being open on an outer surface sleeve;
• and
• at least one closure member for fluid-tightly closing said at least one injection hole upon completion of filling of the equilibrium chamber, the orifice passage and the pressure-receiving chamber with said non-compressible fluid.