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
Activated carbon cryogels and related methods
System and method for determining a characterisitic of an object adjacent to a route
Method and apparatus for user selection of advertising combinations
Display panel and gate driving circuit and driving method for gate driving circuit
X-ray imaging
Anti-proliferative and anti-inflammatory agent combination for treatment of vascular disorders with an implantable medical device
  Randomly Featured Patents
Device for controlling the variation in pitch of the blades of a fan
Bottle holder
Pole for a street light luminaire
Method for automated distributed diagnostics for networks
Ink stick for phase change ink jet printer
Portable carrier
Clock recovery circuit and phase detecting method therefor
Generation and use of digital contents
System and method for fiber based resonator coupling
Pharmaceutical compositions comprising S-(-)-N-propargyl-1-aminoindan