Apparatus for supporting a vibrating object

An apparatus comprising:

• (a) a first fluid chamber located on a vibrating source and having at least one elastic wall thereof;
• (b) a second fluid chamber located on another object facing the vibrating source and having at least one elastic wall thereof;
• (c) a partitioning member disposed between the first and second fluid chambers;
• (d) a plurality of communication passages juxtaposed through the partitioning member for communicating the first and second chambers each of said passages containing a constant fixed volume;
• and
• (e) means for opening and closing at least one of the communication passages in response to a difference between vibration amplitudes of vibrations inputted thereto, wherein said opening and closing means comprises a first envelope installed within the first fluid chamber and projected from a fluid port of the communication passage, the projected end thereof having a rubber member and having a clearance against the elastic wall of the first fluid chamber and a second envelope installed within the second fluid chamber and projected from a fluid port of the communication passage, the projected end thereof having a rubber member and having the same clearance against the elastic wall of the second fluid chamber.