Patent ID: 6694617
Filing Date: 2004-02-24
Classification: F16C,G11B,H02K,Y10T

Abstract:
A method of assembling a fluid dynamic bearing comprising the steps of:defining the bearing, at least partially, by assembling a shaft having a thrust plate at an end thereof and the shaft through a bore in a sleeve, providing a counterplate cup with a layer of fluid therein adapted to serve as the bearing fluid in a fluid dynamic bearing, moving the counterplate cup axially toward the thrust plate so that a side of the counterplate cup passes over a radial end of the thrust plate and over a reduced outer diameter of the sleeve so that the counterplate cup is affixed to the sleeve and encloses a gap over an outer surface of the thrust plate, forcing oil from the cup into a gap between the thrust plate and the sleeve and a gap between an outer surface of the shaft and an inner surface of the sleeves, thereby providing lubricating fluid for a fluid dynamic bearing defined between the shaft and the sleeve and the thrust plate and the sleeve.