LIQUID FILLED VIBRATION ISOLATION DEVICE

PROBLEM TO BE SOLVED: To provide a liquid filled vibration isolation device of a new structure capable of providing excellent vibration isolation effect based on high performance liquid pressure absorbing action shown by reduction of spring repulsion force caused by elastic deformation of a movable plate while securing sufficient effective area of the movable plate. SOLUTION: An annular storage housing is formed between a pressure receiving chamber 44 and a balance chamber 46. A through hole 62 is formed on an inner circumference wall and an outer circumference wall of the storage housing 66. The open tube shape movable plate 68 having a slit 70 formed and opened on one part on a circumference is stored and arranged in the storage housing 66. Pressure in the pressure receiving chamber 44 can act on one of the inner circumference surface and the outer circumference surface of the movable plate 68 through the through hole 62 and pressure in the balance chamber 46 can act on another. Moreover, the movable plate 68 is positioned in the circumference direction in the storage housing 66. A positioning means positioning the through hole and making the same opposing is provided at a position shifting from the slit 70 of the movable plate 68 in the circumference direction. COPYRIGHT: (C)2008,JPO&INPIT