Patent ID: 7134792
Filing Date: 2006-11-14
Classification: F16C,G11B,H02K

Abstract:
1. A fluid dynamic bearing motor, comprising: a stationary member; a rotating member; a fluid dynamic thrust bearing disposed along an axial surface of a sleeve, the thrust bearing configured to axially support the relative rotation of the rotating member and to pump bearing fluid towards a corner of the sleeve; a fluid dynamic journal bearing disposed radially inboard of the thrust bearing along a radial surface of the sleeve, the radial surface being adjacent to the axial surface, the journal bearing configured to radially support the relative rotation of the rotating member and to pump bearing fluid towards the corner of the sleeve; and a recirculation channel, wherein the recirculation channel is fluidly coupled to at least one capillary seal, and one of either the journal bearing or the thrust bearing is configured with a relatively stronger asymmetry to induce bearing fluid recirculation.