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
Image correction method
Method for manufacturing photoelectric conversion device
Fire detector
Method of generating integrated circuit model
Switching apparatus and controlling method thereof
Profiling activity through video surveillance
Process for producing dipeptides or dipeptide derivatives
  Randomly Featured Patents
Apparatus and method for communicating uplink signaling information
Hydrodynamic bearing assembly
Method and apparatus for determining and controlling inkjet printing drying time
Vertical replacement-gate silicon-on-insulator transistor
Field effect transistor device with single layer integrated metal and retained semiconductor masking
Blood test apparatus and blood test method
Configurable power supply assembly
Photoelectric conversion module for optical communication
Cold induced promoter from winter Brassica napus
Apparatus and methods for level and/or straight edge tools