Patent ID: 8490954

Claim:
A liquid sealed vibration isolating device, comprising: a first mounting member to be mounted on one of a couple of mounting counterparts, a second mounting member to be mounted on the other of the mounting counterparts, an insulator for connecting in a vibration isolating state between said first and second mounting members, a primary liquid chamber using said insulator as a part of the wall thereof and being filled with a hydraulic liquid, and 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, wherein said partition member has a hollow frame member and an elastic diaphragm embedded within said frame member, said elastic diaphragm including a central portion, on an inner peripheral side, and a relief valve, on an outer peripheral side, that are formed integrally across an annular fixing portion, said central portion faces said primary liquid chamber and said secondary liquid chamber and is adapted to elastically deform so as to absorb pressure fluctuation of an internal pressure within said primary liquid chamber, said fixing portion is an annular wall surrounding an outer periphery of said central portion and supported by said frame member, said relief valve comprises a thin wall portion shaped on an outer periphery of said fixing portion and permits leaking of hydraulic liquid from said secondary liquid chamber to said primary liquid chamber through a leak hole provided in said frame member.