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
Memory device program window adjustment
Azole derivatives, methods for producing the same, intermediate thereof, agro-horticultural agents
Liquid crystal display
Method and system for expanding axial coverage in iterative reconstruction in computer tomography (CT)
Method for drug screening and characterization by calcium flux
Photoelectric conversion module
Method and apparatus to select a profile of a digital communication line
  Randomly Featured Patents
Blower for medical and industrial applications
Drive system
Method and composition for preservation of cut flowers
Anti-inflammatory pharmaceutical formulations
Automatic focusing circuit using a two period detection interval to compensate for motion occurring within a field of view
Process for producing magnetic recording medium
Portable switch and dimmer control console
Display screen with an icon
Plasma anti-diabetic NUCB2 peptide (pladin) and uses thereof
Flow-through centrifuge