Hydrodynamic bearing unit

Details Hydrodynamic bearing unit Hydrodynamic bearing unit

2006-01-03

2006-01-03

Nguyen, Xuan Lan (Department: 3683)

Bearings

Rotary bearing

Fluid bearing

Reexamination Certificate

active

06981797

ABSTRACT:
The squareness of the both end surfaces of the flange portion with respect to the outer circumference of the shaft portion of the shaft member is set to 0.001 mm or less respectively, and the flatness of both end surfaces of the flange portion is set to 0.001 mm or less respectively. The squareness of the end surface of the bearing member with respect to the inner circumference of the bearing member is set to 0.002 mm or less, and the flatness thereof is set to 0.0015 mm or less. The flatness of the inner surface of the bottom portion of the housing is set to 0.002 mm or less.

REFERENCES:
patent: 5357162 (1994-10-01), Aiyoshizawa et al.
patent: 5707154 (1998-01-01), Ichiyama
patent: 6059459 (2000-05-01), Ichiyama
patent: 6155721 (2000-12-01), Kurosawa et al.
patent: 6316857 (2001-11-01), Jeong
patent: 6390681 (2002-05-01), Nakazeki et al.
patent: 6431757 (2002-08-01), Nakazeki et al.
patent: 6712514 (2004-03-01), Mori et al.

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