Abstract: A cylindrical vibration-damping device wherein an outer cylindrical member is made in a configuration of two sections divided along an circumference, the outer cylindrical member being externally fitted onto intermediate rings in a non-adhesive manner by means of having the intermediate rings sandwiched by the outer cylindrical member in a radial direction, and a plurality of regulating protrusions protruding inward in the radial direction are formed on the outer cylindrical member at a given distance and arranged on both sides of the intermediate rings in an axial direction so as to provide a positioning member that positions the intermediate rings with respect to the outer cylindrical member in the axial direction by means of abutting the intermediate rings against the regulating protrusions in the axial direction.

Abstract: A cylindrical vibration-damping device wherein an outer cylindrical member is made in a configuration of two sections divided along an circumference, the outer cylindrical member being externally fitted onto intermediate rings in a non-adhesive manner by means of having the intermediate rings sandwiched by the outer cylindrical member in a radial direction, and a plurality of regulating protrusions protruding inward in the radial direction are formed on the outer cylindrical member at a given distance and arranged on both sides of the intermediate rings in an axial direction so as to provide a positioning member that positions the intermediate rings with respect to the outer cylindrical member in the axial direction by means of abutting the intermediate rings against the regulating protrusions in the axial direction.

Abstract: A dynamic dater mounted on a rod-shaped oscillating member is disclosed, which includes: a cylindrical mass member disposed radially outwardly of the oscillating member and formed of a metallic material by forging, while being subjected to a scale-removal treatment; an elastic support member for elastically supporting the metallic mass member for connection thereof with the oscillating member; and an elastic covering layer adapted to cover a substantially entire area of the surface of the metallic mass member and integrally formed with the elastic support member. The elastic covering layer is fixed in close contact with the substantially entire area of the outer surface of the mass member, so that the metallic mass member is firmly secured to the elastic support member without using an adhesive. A method of producing the dynamic damper is also disclosed.

Abstract: A fluid-filled elastic mount including an elastic body elastically connecting a first mounting member and a cylindrical second mounting members for fluid-tightly closing one open end of the second mounting member, a partition and a closure members superposed on each other and fixed at their peripheral portions to the other open end of the second mounting member, by calking, to provide on one side of the partition member a pressure receiving chamber partially defined by the elastic body and on the other side of the partition member an equilibrium chamber partially defined by a flexible diaphragm fixed to the closure member. These chambers are filled with a non-compressible fluid. The partition member has a cylindrical positioning shoulder, while the closure member has a cylindrical wall portion which is press-fitted onto the positioning shoulder of the partition member, so that the partition and closure member are positioned relative to each other in their diametric direction.

Abstract: A vibration damping device is disclosed, which includes: a first mounting member and a second mounting member including a cylindrical portion; an elastic body elastically connecting the first and second mounting member such that the elastic body is bonded at a central portion thereof to the first mounting member and at a peripheral portion thereof to an inner circumferential surface of the second mounting member. The second mounting member includes a constricted part which is integrally formed in the open end portion of the cylindrical portion thereof so as to protrude radially inwardly of the cylindrical portion and so as to extend circumferentially over an entire circumference of the cylindrical portion, and which has the maximum outer diameter not larger than that of the cylindrical portion.

Abstract: A fluid-filled elastic mount including an elastic body elastically connecting a first mounting member and a cylindrical second mounting members for fluid-tightly closing one open end of the second mounting member, a partition and a closure members superposed on each other and fixed at their peripheral portions to the other open end of the second mounting member, by calking, to provide on one side of the partition member a pressure receiving chamber partially defined by the elastic body and on the other side of the partition member an equilibrium chamber partially defined by a flexible diaphragm fixed to the closure member. These chambers are filled with a non-compressible fluid. The partition member has a cylindrical positioning shoulder, while the closure member has a cylindrical wall portion which is press-fitted onto the positioning shoulder of the partition member, so that the partition and closure member are positioned relative to each other in their diametric direction.

Abstract: Fluid-filled vibration damping device having a primary fluid chamber partially defined by an elastic body elastically connecting two spaced-apart mounting members and located on one of opposite sides of a partition structure having an orifice passage, an auxiliary fluid chamber partially defined by a flexible diaphragm and located on the other side of the partition structure, and a movable rubber plate partially defining the primary fluid chamber and held by the partition structure, wherein the partition structure comprises a support member including a cylindrical engaging portion, and at least one fluid-tightly fitted component superposed on the support member and each including a cylindrical engagement portion fitted in the engaging portion of the support member, and the movable rubber plate is bonded at its peripheral portion to the inner circumferential surface of the cylindrical engaging portion of the support member which is covered by a sealing rubber layer, and wherein the cylindrical engaging portion

Abstract: A fluid-filled vibration damping device having a plurality of fluid chambers which are filled with a non-compressible fluid, and orifice defining means which has an orifice-defining surface defining an orifice passage through which the fluid is forced to flow, so as to damp input vibrations based on flows of the fluid through the orifice passage, wherein the improvement comprises: a water-repellent coating layer which is formed by a surface treatment and which covers at least a portion of the orifice-defining surface of the orifice defining means.

Abstract: A fluid-filled vibration damping device having an elastic body connecting two mutually spaced-apart mounting members, a fluid chamber filled with a non-compressible fluid, and a movable member which partially defines the fluid chamber and which is oscillated to control a pressure of the fluid in the fluid chamber, for regulating damping characteristics of the device. The movable member partially defines a working air-chamber on one of opposite sides thereof which is remote form the fluid chamber, and is oscillated by a periodic change of an air pressure which is applied to the working air-chamber. A restoring member is disposed on at least one of opposite sides of the movable member for elastically supporting the movable member, so that an elastic force of the restoring member acts on the movable member to restore the movable member to an original position thereof during oscillation thereof.

Abstract: An elastic mount wherein a first and a second support member are spaced apart from each other and elastically connected to each other by an elastic body, wherein the second support member has a cylindrical fixing portion having a larger diameter than the first support member, and a cylindrical bracket member is press-fitted on the fixing portion of the second support member such that the cylindrical bracket member encloses the first support member. The bracket member includes an axial end portion provided with an integrally formed abutting part opposed to the first support member in an axial direction of the bracket member.

Abstract: A fluid-filled cylindrical elastic mount having an inner sleeve, an outer sleeve disposed radially outwardly of the inner sleeve with a predetermined radial spacing therebetween, and an elastic body interposed between the inner and outer sleeves for elastically connecting the inner and outer sleeves. The fluid-filled elastic mount has a generally annular fluid chamber formed between the inner and outer sleeves so as to extend over the entire circumference of the mount. The fluid chamber has a substantially constant cross sectional area over the entire circumference thereof, is filled with a non-compressible fluid having a kinematic viscosity of not higher than 100 centistokes, and undergoes substantially no deformation upon a rise in pressure due to the presence of a stopper portion provided in the chamber which may consist of a ring-like rigid member.

Abstract: A fluid-filled cylindrical elastic mount including an inner sleeve, an outer sleeve disposed radially outwardly of the inner sleeve with a predetermined radial spacing therebetween, and a generally annular elastic body interposed between the two sleeves for elastic connection therebetween. The elastic body at least partially defines an annular fluid chamber formed between the two sleeves and extending over the entire circumference of the mount. The fluid chamber has a substantially constant cross sectional area over the entire circumference thereof, and is filled with a non-compressible fluid having a kinematic viscosity of not higher than 100 centistokes. The elastic mount further includes an annular movable member accommodated in the fluid chamber, such that the movable member can be radially displaced relative to the inner and outer sleeves.