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
Computerized apparatus for identifying industries for potential transfer of a job function
Arrays of optical confinements and uses thereof
Dental composition, kit of parts and use thereof
Plants and seeds of hybrid corn variety CH367819
Phase lock loop with injection pulse control
Circuit arrangement having a load transistor and a voltage limiting circuit and method for driving a load transistor
Systems and methods for arranging and labeling cardiac episodes
  Randomly Featured Patents
Photographic support material with polyolefin back coating blend
Method and apparatus for handling asynchronous exceptions in a dynamic translation system
Health care patient status event processing and reporting
Wine rack
Apparatus for supplying fluid to a rotating tube
Display apparatus
Anti-retrusion oral appliance
Interchangeable stiffening frame with extended width wedgelock for use in a circuit card module
Power distribution adapter
Jet aeration apparatus and method of using the same