Cylindrical vibration-isolating device

A cylindrical vibration-isolating device comprising:

• an inner metal sleeve;
• an outer metal sleeve disposed radially outwardly of said inner metal sleeve with a radial spacing therebetween;
• an elastic body interposed between and elastically connecting said inner metal sleeve and said outer metal sleeve, such that at least one of axially opposite end portions of said inner metal sleeve is located axially outward of said elastic body;
• a connecting rubber layer integrally formed with and protruding axially outwardly from said elastic body, said connecting rubber layer having a thin-walled cylindrical shape and being secured to an outer circumferential surface of said at least one of axially opposite end portions of said inner metal sleeve;
• and
• an annular sealing-rubber member formed integrally with said connecting rubber layer and protruding axially outwardly from a corresponding end face of said inner metal sleeve,
• wherein said annular sealing-rubber member includes a radially inner base portion that rises from a first axial position on said outer circumferential surface of said at least one of axially opposite end portions of said inner metal sleeve, the first axial position being axially inwardly spaced apart from said corresponding end face inner metal sleeve,
• wherein at least one of an inner diameter and an outer diameter of said annular sealing-rubber member gradually increases in an axially outward direction toward a protruding end thereof,
• wherein said outer diameter of said annular sealing rubber member gradually increases in the axially outward direction from a second axial position located axially inwardly of the first axial position, toward said protruding end so that said annular sealing rubber member is adopted deform radially outwardly to minimize fatiguing, and decrease the compressive force acting thereon.