Patent ID: 7004294

Claim:
A vibration absorber assembly comprising: a disc shaped housing having a central rotational axis and a plurality of distinct, circumferentially spaced apart, radially elongated cavities, said housing being adapted to be rotated in a predetermined direction, each of said cavities having a first end positioned at a first radial distance from said central rotational axis and a second end positioned at a second radial distance from said central rotational axis, said first radial distance being-less than said second radial distance so that said first end is radially closer to said central rotational axis than said second end, said first end being circumferentially forward of said second end in said predetermined direction of rotation, each of said cavities having a greater elongation in the radial direction than in the circumferential direction; and a plurality of movable masses, each movable mass being housed in one of said plurality of radially elongated cavities and free to move therein, without restriction at all times primarily in a radial direction between the first end and the second end of said cavities as a result of rotational acceleration and deceleration, respectively, of said housing.