Patent ID: 9010738
Filing Date: 2015-04-21
Classification: F16F

Abstract:
1. A fluid filled vibration damping device comprising: a first mounting member and a second mounting member, which are elastically connected by a main rubber elastic body; a pressure receiving chamber formed with a wall partially composed of the main rubber elastic body disposed on one side of a partition member provided on a side of the second mounting member; an equilibrium chamber formed with a wall partially composed of a flexible membrane disposed on an other side of the partition member; an orifice passage formed through the partition member to connect the pressure receiving chamber and the equilibrium chamber with each other; a movable member is arranged in a containing space formed in the partition member such that fluid pressures of the pressure receiving chamber and the equilibrium chamber are exerted on the movable member via a plurality of through holes that penetrate through walls of the containing space; and a fluid injection passage that is communicated with the pressure receiving chamber and the equilibrium chamber with an opening thereof out to an exterior closed, wherein the partition member is formed with a first communication groove and a second communication groove, wherein the first communication groove is a concave groove opening out on a bottom face of the partition member opposite the flexible membrane, and each of both ends in the longitudinal direction of the first communication groove opens into one and another of the plurality of through holes, respectively, to interconnect all the through holes arranged next to one another, and wherein the second communication groove is a concave groove opening out on the bottom face of the partition member opposite the flexible membrane, whereby one end in a longitudinal direction of the second communication groove opens out into one of the through holes, while an other end opens out into the orifice passage.