Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Spindle motor and rotation device having dynamic pressure bearing










Image Number 3 for United States Patent #7531928.

A spindle motor includes a shaft including a core spindle member with a large and a small diameter portions and an encircling annulus member attached to the small diameter portion; a rotor hub attached to the large diameter portion; a bearing member; a radial bearing portion provided with first dynamic pressure creating grooves and formed between the outer peripheral surface of the encircling annulus member and the inner peripheral surface of the bearing member; a thrust bearing portion provided with second dynamic pressure creating grooves and formed between a lower end of the encircling annulus member and the bottom of the bearing member; a first opening formed at a radially inner side of the thrust bearing portion; a second opening formed at a radially outer side of the large diameter portion; and a communication hole continuously formed from the first opening to the second opening.








 
 
  Recently Added Patents
Method for controlled layer transfer
Manufacturing process for cellular screening substratum, resultant substratum, and method and apparatus for screening
Scanning of a touch screen
Cross-platform cloud-based map creation
Fabricated leaf tea products
Systems and methods for image stream processing
Cis-alkoxy-substituted spirocyclic 1-H-pyrrolidine-2,4-dione derivatives
  Randomly Featured Patents
Method and apparatus for observability-based code coverage
Process for recovery of carbonaceous materials from subterranean deposits by in situ processing
Apparatus for dry hydro-therapy body massage with fluid spray control device
Footwear retaining device with cam cleat longitudinal line retaining clip and rear clip for retaining lacing tip
Multi-level memory cell
Apparatus and method for drug screening
Damper and home-bar door apparatus for refrigerator using the same
Method and device for producing a master die tool
Method for producing low oxide metal powders
Magnetic head for perpendicular magnetic recording having a return path section