Patent ID: 6439773
Filing Date: 2002-08-27
Classification: F16C,G11B

Abstract:
A spindle assembly comprising a housing, and a rotary shaft rotatably mounted in said housing through a bearing gap, wherein two externally pressurized gas bearings for supporting said rotary shaft at least in an axial direction through a bearing gap in a non-contact manner are provided in said housing, wherein said two externally pressurized gas bearings respectively have bearing gaps, wherein said bearing gaps include a first bearing gap and a second bearing gap, said first bearing gap being nearer to the outside of said housing than said second bearing gap and being smaller than said second bearing gap, and wherein a non-contact seal gap is formed near the externally pressurized gas bearing nearer to the outside of said housing to prevent exhaust gas from said externally pressurized gas bearings from leaking to the outside of said housing.