Hydrodynamic bearing and disc rotation apparatus using the same

Details Hydrodynamic bearing and disc rotation apparatus using the same Hydrodynamic bearing and disc rotation apparatus using the same

2007-07-03

2007-07-03

Hannon, Thomas R. (Department: 3682)

Bearings

Rotary bearing

Fluid bearing

C384S121000, C384S123000

Reexamination Certificate

active

10727860

ABSTRACT:
A high-accuracy, long-life hydrodynamic bearing that does not cause oil film breakage in bearing clearances and a disc rotation apparatus using the bearing is disclosed. Oil film breakage is avoided as negative pressure is prevented from generating between the shaft and sleeve of the hydrodynamic bearing. Herringbone shaped dynamic pressure generating grooves, located on the thrust bearing section and the radial bearing section of the hydrodynamic bearing, are oil filled and have optimum shapes. The optimum shapes prevent the generation negative pressure and thus prevents the coagulation of air bubbles that can cause oil film breakage. The disc rotation apparatus, that holds a reproduction/recording disc, is concentrically secured to the hydrodynamic bearing and rotated. The disc is put into contact with magnetic or optical heads while rotating in the disc rotation apparatus. Both the hydrodynamic bearing and the disc rotation apparatus experience high reliability.

REFERENCES:
patent: 5504637 (1996-04-01), Asada et al.
patent: 6023114 (2000-02-01), Mori et al.
patent: 6033118 (2000-03-01), Asai et al.
patent: 6196722 (2001-03-01), Asada et al.
patent: 2003/0185473 (2003-10-01), Gomyo et al.
patent: WO02/04825 (2002-01-01), None

Affiliated with

Also associated with

Rating

Hydrodynamic bearing and disc rotation apparatus using the same 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 and disc rotation apparatus using the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrodynamic bearing and disc rotation apparatus using the same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3722633