Patent ID: 7494283

Claim:
A hydrodynamic bearing assembly comprising: a bearing sleeve defining a receiving chamber therein; a bearing received in the receiving chamber of the bearing sleeve and defining a bearing hole in the bearing; a sealing cover mounted to an open end of the bearing sleeve and comprising an enlarged section adjacent to the bearing; a shaft rotatably disposed in the bearing hole of the bearing and extending through the sealing cover, on which a plurality lubricant pressure generating grooves are defined; and a lubricant retaining space defined by the enlarged section of the sealing cover, an end of the bearing and the shaft for receiving lubricant therein, wherein one of the sealing cover and the shaft defines a groove therein, the other one of the sealing cover and the shaft extends a flange into the groove; wherein a portion of the lubricant pressure generating grooves extends into the lubricant retaining space and above the bearing hole of the bearing.