Patent ID: 8342821

Claim:
An electrical submersible pump motor, the electrical submersible pump motor having a stator having a rotatable shaft installed within the stator, a rotor installed in sections around the shaft, and a bearing assembly installed between the sections of the rotor, the bearing assembly comprising: a bearing body, the bearing body having a hub and an outer portion extending outward from the hub, the outer portion being in frictional engagement with the stator; a plurality of passages in the outer portion; and a mass damper, the mass damper having a upper portion, a lower portion and mass damper prongs connecting the upper and lower portion, the mass damper being installed around the hub with the upper portion disposed so as to circumscribe an upper portion of the hub, the lower portion being disposed to circumscribe a lower portion of the hub, and the mass damper prongs being disposed in the passages.