Tokai Rubber Industries, Ltd.

Nissan Motor Company Limited

Joji Tsutsumida

Yasuhiro Suzuki

Masaaki Hamada

Tetsuo Uozumi

Masatoyo Kagawa

A fluid-filled elastic cylindrical mount including (a) a core portion including a center shaft member, an intermediate sleeve disposed radially outwardly of the center shaft member, and an elastic body interposed between and connecting the center shaft member and the intermediate sleeve, (b) and an outer sleeve portion having a cylindrical bore in which the core portion is fixedly received, whereby pockets formed in the core portion are closed by the outer sleeve portion to provide fluid chambers, the outer sleeve portion consisting of a plurality of sections having respective part-cylindrical inner surfaces cooperating to define the cylindrical bore, and respective pairs of axially extending abutting surfaces which are contiguous to the part-cylindrical surfaces and at which the sections are butted together, and wherein a sealing member is squeezed by and between the abutting surfaces, and the sections have respective fixing portions which are spaced apart from the sealing member and at which the sections are fixed to each other.

Fluid-filled elastic cylindrical mount using split outer sleeve with

A fluid-filled cylindrical elastic mount having an inner sleeve and an outer sleeve, and an elastic body interposed therebetween. The elastic mount also has a primary fluid chamber adapted to undergo pressure changes upon application of a vibrational load to the mount, and a first and a second auxiliary fluid chamber partially defined by a first and a second flexible diaphragm, respectively. The second flexible diaphragm has a greater stiffness than the first flexible diaphragm. A non-compressible fluid flows between the primary and first auxiliary fluid chambers, through a first orifice passage tuned to a first frequency range, and a second orifice passage tuned to a second frequency range that is higher than the first frequency range. The fluid also flows between the primary and second auxiliary fluid chambers, through a third orifice passage tuned to a third frequency range that is higher than the second frequency range. The elastic mount further includes a valve for selectively permitting or interrupting flow of the fluid through the second orifice passage between the primary fluid chamber and the first auxiliary fluid chamber.

Fluid-filled cylindrical elastic mount having three fluid chambers and

A fluid-filled mount having first and second elastic bodies which elastically connect an inner and an outer sleeve and partially define a pressure-receiving chamber which communicates with a variable-volume equilibrium chamber through an orifice passage. The first elastic body includes two radial portions extending from diametrically opposite circumferential portions of the inner sleeve, in respective radial directions almost perpendicular to a diametric direction in which a static load acts on the mount. A connecting member extends from the inner sleeve between the above two radial portions and which is located on one of diametrically opposite sides of the inner sleeve on which the radial distance between the two sleeves is reduced by the static load. The second elastic body includes two thin-walled lateral walls which extend from respective axially opposite ends of the connecting member and which are inclined in a radially outward direction of the mount, and further includes two thick-walled radial walls which extend from the ends of the lateral walls in the above diametric direction.

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Komaki, Japan

Joji Tsutsumida