Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Fluid dynamic bearing device










Image Number 5 for United States Patent #8113715.

In this type of fluid dynamic bearing device, a dynamic pressure generating part having high molding accuracy is formed at low cost. A rotating member 2 includes a shaft part 9, and a holding member 10 as a thrust member provided in one end of the shaft part 9. In a partial annular region of a lower end surface 10a1 of a disk part 10a making up the holding member 10, a region where a plurality of dynamic pressure grooves 10a2 and a plurality of sectioning parts 10a3 formed between the plurality of dynamic pressure grooves 10a2 to section the respective dynamic pressure grooves 10a2 are arrayed spirally is formed. The above-described dynamic-pressure-groove 10a2 arrayed region is opposed to an upper end surface 8a of a housing part 8, and forms a thrust bearing clearance of a thrust bearing part T between the dynamic-pressure-groove 10a2 and the upper end surface 8a during the rotation of the shaft part 9. The above-described dynamic-pressure-groove 10a2 arrayed region is molded in the lower end surface 10a1 of the holding member 10 by press working.








 
 
  Recently Added Patents
High-density fiber optic modules and module housings and related equipment
Image quality assessment
Verification of a portable consumer device in an offline environment
Switched capacitor hold-up scheme for constant boost output voltage
Method and apparatus for performing real time anomaly detection
Device and method for unified codes
System for purifying air through germicidal irradiation and method of manufacture
  Randomly Featured Patents
Jewelry component
Electric hair dryer
Method of handing off and a wireless communication device
Disk drive write method
Line sensor arrangement
Thermoacoustic communications system
Automatic riveting machine
Shaft furnace
Memory device
Method and apparatus for predicting peak voltage of a cable conveyed tool