Patent ID: 7518276

Claim:
A disc drive motor comprising: a sleeve; a shaft and a hub supported for rotation relative to the sleeve; a fluid dynamic bearing including a journal bearing established in a gap between the shaft and the sleeve, and a thrust bearing established in a gap between an end surface of the shaft and a facing surface of a counterplate supported from the sleeve; a radial capillary seal comprising a first capillary seal defined between opposed respective surfaces of the shaft and the sleeve, a narrow end of the first capillary seal formed proximate the journal bearing, and a second capillary seal defined between first and second opposed generally radially extending and relatively irrotatable surfaces, in fluidic communication with the fluid dynamic bearing, a narrow end of the second capillary seal disposed proximal the journal bearing, and having a fluidic volume larger than the first capillary seal; and at least one recirculation path extending from the radial capillary seal for purging air bubbles from the journal bearing.