Abstract: A method of manufacturing a vibration damping bushing wherein after setting a main shaft member on a lower mold, an medial sleeve is set to be disposed about the main shaft member, and a plurality of sections are moved forward in a centripetal direction to form an intermediate mold together, and then an upper mold is superposed onto the intermediate mold to form a mold cavity therein. At least one positioning protrusion is formed on a cavity defining face, being discontinuous in a circumferential direction, while being located at either semi-circumference of the cavity defining face with any diametric line interposed therebetween. The medial sleeve is set in position in an axis-perpendicular direction within the mold cavity by holding the positioning protrusions in contact against an outer peripheral face of the medial sleeve. A vibration damping bushing manufactured by this method is also disclosed.

Abstract: A method of manufacturing a vibration damping bushing wherein after setting a main shaft member on a lower mold, an medial sleeve is set to be disposed about the main shaft member, and a plurality of sections are moved forward in a centripetal direction to form an intermediate mold together, and then an upper mold is superposed onto the intermediate mold to form a mold cavity therein. At least one positioning protrusion is formed on a cavity defining face, being discontinuous in a circumferential direction, while being located at either semi-circumference of the cavity defining face with any diametric line interposed therebetween. The medial sleeve is set in position in an axis-perpendicular direction within the mold cavity by holding the positioning protrusions in contact against an outer peripheral face of the medial sleeve. A vibration damping bushing manufactured by this method is also disclosed.

Abstract: A vibration damping device includes an inner cylinder member having a first outer flange extending diametrically outward from its one axial end; an outer cylinder member having a second outer flange extending diametrically outward at its one axial end; and a rubber elastic body elastically connecting the inner cylinder member and the outer cylinder member, while having an end section sandwiched between sandwiched between the first and second outer flanges. The rubber elastic body is provided with hollow portions recessed diametrically inward from an outside periphery of the first outer flange at three or four locations in a circumferential direction of the end section of the rubber elastic body.

Abstract: A vibration damping device includes an inner cylinder member having a first outer flange extending diametrically outward from its one axial end; an outer cylinder member having a second outer flange extending diametrically outward at its one axial end; and a rubber elastic body elastically connecting the inner cylinder member and the outer cylinder member, while having an end section sandwiched between sandwiched between the first and second outer flanges. The rubber elastic body is provided with hollow portions recessed diametrically inward from an outside periphery of the first outer flange at three or four locations in a circumferential direction of the end section of the rubber elastic body.