Patent ID: 7234868
Filing Date: 2007-06-26
Classification: F16C

Abstract:
1. A fluid dynamic bearing defined by the interface of a hub and a sleeve, the hub having a vertical shaft portion configured to rotate within the sleeve, and a horizontal body portion configured to rotate above the sleeve, the bearing comprising: a first gap region between the shaft portion of the hub and the sleeve; a second gap region between the horizontal body portion of the hub and the sleeve, the second gap region having a first end in fluidic communication with the first gap egion and a second end exposed to an ambient environment; a volume of lubricating fluid within the first gap and at least proximal the first end of the second gap region; and an oil pumping groove pattern disposed at least partially along the second gap, the oil pumping groove pattern pumping the lubricating liquid toward the first end of the second gap region during relative rotation of the hub and the sleeve.