Fluid dynamic pressure bearing device, spindle motor...

Details Fluid dynamic pressure bearing device, spindle motor... Fluid dynamic pressure bearing device, spindle motor...

2005-11-29

2010-02-16

Charles, Marcus (Department: 3656)

Bearings

Rotary bearing

Fluid bearing

C384S107000, C384S112000, C384S123000

Reexamination Certificate

active

07661882

ABSTRACT:
A fluid dynamic pressure bearing device includes a shaft member (5) and a bearing member (41), at least one of the shaft member or the bearing member being rotatable with respect to the other. A shaft member-side annular member (13) is fixed with respect to the shaft member. The shaft member-side annular member includes a large-diameter rim portion and a small-diameter outer circumferential surface portion. A bearing member-side annular member (14) is fixed with respect to the bearing member. The bearing member-side annular member includes an inner circumferential large-diameter step portion, and a small-diameter inner circumferential surface portion. A plurality of convex surface portions are formed either on a surface of the inner circumferential large-diameter step portion facing the large-diameter rim portion of the shaft member-side annular member, or on a surface of the large-diameter rim portion of the shaft member-side annular member facing a surface of the inner circumferential large-diameter step portion. A reflux groove (17) surrounds the convex surface portions.

REFERENCES:
patent: 5634724 (1997-06-01), Zang et al.
patent: 5876124 (1999-03-01), Zang et al.
patent: 6154339 (2000-11-01), Grantz et al.
patent: 6296391 (2001-10-01), Hayakawa et al.
patent: 6814492 (2004-11-01), Beckers
patent: 6854889 (2005-02-01), Nishimura et al.
patent: 6900568 (2005-05-01), LeBlanc et al.
patent: 7059772 (2006-06-01), Oku et al.
patent: 2001/0046336 (2001-11-01), Saeki et al.
patent: 2002/0003678 (2002-01-01), Sakuragi et al.
patent: 2004/0165797 (2004-08-01), Oku et al.
patent: 0 697 535 (1996-02-01), None
patent: A 2002-155940 (2002-05-01), None

Affiliated with

Also associated with

Rating

Fluid dynamic pressure bearing device, spindle motor... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fluid dynamic pressure bearing device, spindle motor..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fluid dynamic pressure bearing device, spindle motor... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4222508