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
End to end email monitor
Apparatus for performing timer management regarding a system timer scheduler service, and associated method
Image processing device, image forming apparatus, and non-transitory computer readable recording medium
Generating wiki pages from content and transformation objects
Fabric-backplane enterprise servers with pluggable I/O sub-system
Scanning optical positioning system with spatially triangulating receivers
Systems and methods for analyzing telecommunications invoices for payment
  Randomly Featured Patents
Recording distance measuring instrument at vehicle wheel hub
Photosensitive member cartridge
Plant food and fertilizer applicator
Semiconductor device and method of manufacturing the same
Radial pocket forming and insert positioning instruments, corneal marker, and method for using same
Calibrated mechanical orthopedic driver with wear-compensated torque-limiting mechanism
Valve-pin actuating device for a hot runner apparatus
Inverse filtering method, synthesis filtering method, inverse filter device, synthesis filter device and devices comprising such filter devices
Temperature-control circuit of a heating line and a temperature-control method thereof
Hysteresis type battery charger having output short circuit protection