Resources Contact Us Home
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
Solid-state image capture device and image capture apparatus
3D IC method and device
Repeating frame battery with joining of cell tabs via welded-on male and female slip-fit connectors
Single-electron detection method and apparatus for solid-state intensity image sensors with a charge splitting device
Light emitting diode package and method of fabricating the same
Providing a feedback loop in a low latency serial interconnect architecture
Round carrying case
  Randomly Featured Patents
Vent device for ostomy appliance
Aspartame synthesis
Catalyst and process for the production of chlorofluorinated hydrocarbons
Process of producing 8A- and 9A-azalide antibiotics
Imaging apparatus that determines a band of sound and emphasizes the band in the sound
Steer-by-wire system
Revolution counter attached to tires
Method of storing frozen microbubble suspensions
Weedless hook and lure having lure interchangeability