Patent ID: 6450487
Filing Date: 2002-09-17
Classification: F16F

Abstract:
A dynamic damper for mounting on a rod-shaped oscillating member, comprising:a generally cylindrical metallic mass member formed of sintered metal or forged metal, and adapted to be disposed radially outwardly of the oscillating member; a pair of elastic support members formed on and extending axially outwardly from axially opposite sides of said metallic mass member for elastically supporting said metallic mass member with respect to the rod-shaped oscillating member; and an elastic covering layer integrally formed with said pair of elastic support members and being fixed in close contact with substantially an entire surface area of said metallic mass member without using an adhesive, covering substantially the entire surface area of said metallic mass member, wherein said metallic mass member has at least two slits extending through a wall thickness thereof, said at least two slits being open in and extending axially inwardly from axially opposite end faces of the metallic mass member, respectively, and being filled with said elastic covering layer, and wherein said metallic mass member further has inclined planes formed at radial inner edges of circumferentially opposite open-end edge portions of each of said at least two slits, each of said inclined planes extending over an inner surface of the corresponding slit, the corresponding axial end face of said metallic mass member and the inner circumferential surface of said metallic mass member, to chamfer said radial inner edge of the corresponding open-end edge portion.