Patent ID: 6386846
Filing Date: 2002-05-14
Classification: F04B,Y10S

Abstract:
A damping device arranged in a gas passage for damping compression waves transmitted from a vibration source by a gas in the gas passage, said damping device comprising at least one passage component, said passage component comprising:a first cylindrical wall defining a first passage portion therein; a second cylindrical wall arranged outside and parallel to said first cylindrical wall, said first and second cylindrical walls defining a second passage portion between them; a closure wall closing one end of said first passage portion and a corresponding end of said second passage portion; and a third passage portion arranged near said closure wall and connecting said first passage portion to said second passage portion; wherein said first passage portion is located on the upstream side of said second passage portion with respect to the transmitting direction of compression waves from said vibration source, and a cross-sectional area of said second passage portion is greater than a cross-sectional area of said first passage portion.