Patent ID: 6955471
Filing Date: 2005-10-18
Classification: F16C

Abstract:
1. A dual cone fluid dynamic bearing (FDB) cartridge including a sleeve, first and second cones supported from the sleeve each of the cones having an apex and a flaring, diverging surface leading to a wider base having a substantially flat surface, the apexes of the cones being near to each other, a hub defining a facing surface separated by a gap from the surface of the first and second cones fluid filling the gap to support relative rotation of the sleeve and the hub a centrifugal capillary seal mounted adjacent the base of each of the cones to prevent loss of the fluid from the cartridge a fluid circulation path defined around each of the cones including a gap or path between the apexes of the cones, a fluid flow path defined between an interior surface of each of the cones and the sleeve and between the base of each of the cones and a surface of the centrifugal seal so that fluid is maintained in the fluid dynamic bearing.