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
Large scale data storage system with fault tolerance
Method of forming wafer level mold using glass fiber and wafer structure formed by the same
Systems and/or methods for determining item serial number structure and intelligence
Carbon dioxide capture system and methods of capturing carbon dioxide
Image capturing apparatus, control method thereof, and program
Image forming apparatus to automatically select a communication condition
Music composition automation including song structure
  Randomly Featured Patents
Electronic ballast for a high-pressure discharge lamp
Simplifying the layout of printed circuit boards
Arrangement for the complete emptying of quartz tanks or crucibles filled with a silicon melt following silicon band drawing
Catheter
Net solar radiometer with thermally balanced spectral response
Spray system for a dishwashing machine
Apparatus and method for analyte detection
1,2,3,4,-tetrahydroquinoline-8-sulphonic acid chlorides and acids, their preparation and their use as synthetic intermediates
Remote control
Taut sheath splicing apparatus