Patent ID: 7343682
Filing Date: 2008-03-18
Classification: F16C,Y10T

Abstract:
1. A method for use in the manufacturing of a fluid-dynamic-pressure bearing unit having a sleeve, and a shaft disposed within the sleeve with bearing clearance existing therebetween whereby one of the shaft and the sleeve is rotatable relative to the other, the method comprising: evacuating a first chamber containing oil until a first level of vacuum pressure prevails in the first chamber; providing within the first chamber a stirrer of a type that can be actuated remotely by a motor that is not mechanically attached to the stirrer; stirring the oil in the first chamber with the stirrer by actuating the stirrer remotely from outside the first chamber using the motor; evacuating a second chamber, in which the bearing unit is disposed, independently of the first chamber and until a second level of vacuum pressure prevails in the second chamber; supplying the oil from the first chamber to the bearing clearance of the bearing unit disposed in the second chamber when the first level of vacuum pressure is prevailing in the first chamber and the second level of vacuum pressure is prevailing in the second chamber; and subsequently increasing the pressure inside the second chamber to thereby induce the oil to spread into the bearing clearance.