Patent ID: 7802777

Claim:
A liquid-filled vibration isolator including a first fitting connected to a supported part, a second fitting connected to a supporting part and through a rubber elastic material to the first fitting, a main liquid chamber formed between both the first and second fittings to change the volume thereof with deformation of the rubber elastic material, and a first sub liquid chamber communicated via a first orifice channel with the main liquid chamber, the vibration isolator comprising: a second sub liquid chamber communicated via a second orifice channel with one of the main liquid chamber and the first sub liquid chamber, the second orifice channel having at least one of a shorter distance and a larger cross-sectional area than the first orifice channel; and an elastic film member separating the second sub liquid chamber from the other of the main liquid chamber and the first sub liquid chamber, the elastic film member having a communicating hole of a predetermined size formed to provide communication between the other chamber and the second sub liquid chamber.