Patent ID: 8011644

Claim:
A liquid sealed vibration isolating device comprising a first metallic fitting to be mounted on one of mounting counterparts, a second cylindrical metallic fitting to be mounted on the other of the mounting counterparts, an insulator for connecting in a vibration isolating state between said first and second metallic fittings, a primary liquid chamber using said insulator as a portion of the wall thereof and being filled with a hydraulic liquid, a secondary liquid chamber being partitioned from said primary liquid chamber by a partition member and having at least a portion of a wall formed by a diaphragm, an orifice passage being formed in said partition member to communicate between said primary liquid chamber and said secondary liquid chamber, and a portion of said second metallic fitting forming an outer metallic cylinder which is united with the periphery of said insulator, wherein said partition member is floatingly supported between said insulator and an outer peripheral thick wall portion of said diaphragm while an elastic body is interposed between said second metallic fitting and said partition member, so as to block the transmission of vibration from said partition member to said second metallic fitting, said outer peripheral thick wall portion of said diaphragm is provided with a rigid metallic diaphragm support that separates the outer peripheral thick wall portion into an elastic supporting portion for floatingly supporting said partition member and a seal portion that is in direct contact with an inner wall of the second cylindrical metallic fitting, said metallic diaphragm support is fixed by said second metallic fitting in a directly contacted relationship between said metallic diaphragm support and said second metallic fitting and arranged away from said partition member, and said elastic support portion is located inside of said metallic diaphragm support to floatingly support said partition member.