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
Amplitude-shift-keying (ASK) envelope detector and demodulation circuits
Electric rotating machine for vehicle
Systems and methods for detecting and rejecting defective absorbent articles from a converting line
Indicating transfer in an IMS network
Insulin derivative
Automated gate system
System and method for providing advertising content using a group training system
  Randomly Featured Patents
Catalyst and process of polymerization of alpha monoolefins
Apparatus and method for rendering characters into a memory
Antenna communication method for a chip card and associated device
Knife sheath of tough flexible material
Articular surface implant and delivery system
Smart cart to automatically manage portable information handling systems
Cassette for image information recording carrier, mechanism for removing image information recording carrier from the cassette, and apparatus for reading image information
Method and device for calculating a biological component density of a subject
Acyloxy derivatives of [phenylsulfonyl(or sulfinyl)]thiophenesulfonamide for the topical treatment of elevated intraocular pressure
Mechanism for centering and clamping a floppy disc