Patent ID: 7140602
Filing Date: 2006-11-28
Classification: F16F

Abstract:
1. A fluid filled vibration damping device for connecting two members in a vibration damping fashion, comprising: a first mounting member fixable to one of the two members; a second mounting member fixable to an other of the two members; an elastic body bonded at a central portion thereof to the first mounting member and at an outer circumferential portion to the second mounting member, for elastically connecting the first and second mounting members, said elastic body partially defining a pressure receiving chamber filled with a non-compressible fluid and undergoing fluid pressure variation upon application of vibrational load between the first and second mounting members; a flexible rubber layer disposed about and covering an outside of the elastic body opposite the pressure receiving chamber, in order to define therebetween an equilibrium chamber filled with the non-compressible fluid and partially defined by the flexible rubber layer so as to easily permits a volumetric change thereof; and an orifice passage for fluid communication between the pressure receiving chamber and the equilibrium chamber, wherein the first mounting member includes an elastic-body-side central member bonded to the central portion of the elastic body, and a rubber-layer-side central member bonded to a central portion of the flexible rubber layer, which are superposed on and fastened to each other by means of a connecting bolt, wherein a projectionlrecess fitting portion is provided at a central portion of an interface between the elastic-body-side central member and the rubber-layer-side central member; wherein the rubber-layer-side central member includes a mounting projection projecting outward on an opposite side from the interface so that the first mounting member is fixable to the one of the two members at the mounting projection, and the connecting bolt is situated off-centered from a center of the rubber-layer-side central member and the elastic-body-side central member by a predetermined distance, and wherein the projection/recess fitting portion is of non-circular configuration in transverse cross section so that a relative rotation between the elastic-body-side central member and the rubber-layer-side central member is prevented.