Hydrodynamic bearing rotary device and information apparatus

Details Hydrodynamic bearing rotary device and information apparatus Hydrodynamic bearing rotary device and information apparatus

2011-01-04

2011-01-04

Charles, Marcus (Department: 3656)

Bearings

Rotary bearing

Fluid bearing

C384S115000, C384S123000

Reexamination Certificate

active

07862238

ABSTRACT:
A hydrodynamic bearing rotary device which can reduce rotation friction, and recording and reproducing apparatus including the same is provided. In the hydrodynamic bearing rotary device, such as hard disc devices, a rotary shaft having a hub on one end is provided in a bearing of a sleeve so as to be rotatable. Thrust hydrodynamic grooves are provided on the other end surface of the rotary shaft, to form a thrust bearing with the thrust plate. A communication path is provided in the sleeve. The second gap between the hub and the sleeve end surface is used as a flow channel and is connected to the communication path. In this way, the rotation friction torque of the thrust bearing can be made sufficiently small, and internal pressure in bonded portions of the rotary shaft or the bottom plate can be suppressed. Thus, the oil can be prevented from oozing out from a small space of the bonded surfaces. Furthermore, the hydrodynamic bearing can be made thin. These effects can be combined to realize an optimal hydrodynamic bearing rotary device.

REFERENCES:
patent: 6836388 (2004-12-01), Nishimura et al.
patent: 6980394 (2005-12-01), Inoue et al.
patent: 7092203 (2006-08-01), Inoue et al.
patent: 7105970 (2006-09-01), Yajima et al.
patent: 7153028 (2006-12-01), Oelsch
patent: 7210850 (2007-05-01), Kusaka et al.
patent: 7391139 (2008-06-01), Yamamoto
patent: 7525226 (2009-04-01), Kodama
patent: 7556433 (2009-07-01), Kurimura et al.
patent: 2004/0223673 (2004-11-01), Tiller et al.
patent: 2005/0084189 (2005-04-01), Oelsch
patent: 2006/0018576 (2006-01-01), Kusaka et al.
patent: 2006/0029312 (2006-02-01), Kiriyama et al.
patent: 58-19414 (1983-02-01), None
patent: 59-19414 (1983-02-01), None
patent: 11131107 (1999-05-01), None
patent: 2001135538 (2001-05-01), None
patent: 2003-88033 (2003-03-01), None
patent: 2003294027 (2003-10-01), None
patent: 2004239387 (2004-08-01), None
patent: 2004270820 (2004-09-01), None
patent: 2005-45876 (2005-02-01), None
patent: 2006-29565 (2006-02-01), None

Affiliated with

Also associated with

Rating

Hydrodynamic bearing rotary device and information apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hydrodynamic bearing rotary device and information apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrodynamic bearing rotary device and information apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2618887