Patent ID: 9347516
Filing Date: 2016-05-24
CPC Classification: F16F

Claim Text:
1. A liquid sealed vibration isolating device comprising: a liquid chamber being partitioned into a primary liquid chamber and a secondary liquid chamber by a partition member, an orifice being provided in the partition member to communicate between the primary liquid chamber and the secondary liquid chamber, and a relief valve for controlling cavitation being provided in a central portion of an elastic diaphragm, which is provided in the partition member, wherein the partition member is formed integrally by holding the elastic diaphragm between an upper holder and a lower holder, wherein the elastic diaphragm is provided at the central portion thereof with the relief valve and integrally provided at an outer peripheral portion thereof with a main body section for absorbing an internal pressure fluctuation of the primary liquid chamber, and the relief valve is formed thinner than the main body section and has a relief hole at a central area thereof, and wherein the lower holder has a seal section provided below the relief valve, and the seal section comes in close contact with the relief valve to close the relief hole, and, when in a cavitation occurring condition the relief valve is brought out of contact with the seal section to open such that a portion around the relief hole of the relief valve is elastically deformed in such a way as to be lifted up, a hydraulic liquid leaks from the secondary liquid chamber through the relief hole to the primary liquid chamber.