Importance

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Abstract

A vibration isolator mounted on a support for a vehicle engine or the like which is a vibration source, in which a central limitational passage is formed in a partition wall which divides a fluid chamber filled with a fluid into a pair of small fluid chambers, the central limitational passage providing communication between the pair of small fluid chambers. The central limitational passage can be opened or closed by a valve capable of linearly moving so that the resistance to the fluid flowing through the central limitational passage is changed when vibrations occur. Additional connectable small limitational passages are provided in the valve and partition wall to provide communication between the small fluid chambers when the central limitational passage is closed by the valve. With this structure, vibrations can be absorbed over a wide frequency range.

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First Claim