Patent ID: 6995955
Filing Date: 2006-02-07
Classification: F16C,G11B

Abstract:
1. An apparatus for a pivot assembly for hard disk drive use comprising: two ball bearings, each comprising an outer ring; a shaft, wherein said ball bearings have been mated with both ends of the shaft; an inner wall part, mounted on the shaft, and extending to an outer circumference of the outer ring of each of said ball bearings; and a sleeve, disposed between both of said ball bearings, and mated to the inner wall part, wherein said sleeve is fixed by means of laser welding to the outer rings of said ball bearings, wherein said sleeve further comprises a concave part formed in the outer circumference of said sleeve and having a bottom wall in the vicinity of the outer circumference of said outer rings, and wherein the bottom wall of this concave part is laser welded with the outer circumference of said outer rings.