Patent ID: 7210674
Filing Date: 2007-05-01
Classification: F16F

Abstract:
1. A fluid-filled vibration damping device comprising: a first mounting member; a second mounting member disposed spaced away from the first mounting member; a rubber elastic body elastically connecting the first and second mounting member together; a pressure receiving chamber partially defined by the rubber elastic body and filled with a non-compressible fluid, the pressure receiving chamber undergoing fluid pressure fluctuation during input of vibration to the device; an equilibrium chamber partially defined by a flexible layer for permitting a volume change thereof and filled with the non-compressible fluid; a first orifice passage permitting a fluid communication between the pressure receiving chamber and the equilibrium chamber, and being tuned to a first frequency range; a medial chamber disposed between the pressure receiving chamber and the equilibrium chamber, and filled with the non-compressible fluid; a second orifice passage permitting a fluid communication between the equilibrium chamber and the medial chamber, and being tuned to a second frequency range higher than the first frequency range; a pressure fluctuation transmitting mechanism disposed between the pressure receiving chamber and the medial chamber for permitting a restricted pressure fluctuation transmission between the pressure receiving chamber and the medial chamber owing to restrictive displacement or deformation of a movable member thereof; and a pressure regulating rubber plate partially defining the medial chamber and regulating fluid pressure fluctuation in the medial chamber owing to an elastic deformation thereof, wherein the equilibrium chamber is situated on a side opposite from the medial chamber with the pressure regulating rubber plate partially defining the medial chamber interposed therebetween.