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
Tablet computer
Agents for preventing and treating disorders involving modulation of the ryanodine receptors
Poloxamer foamable pharmaceutical compositions with active agents and/or therapeutic cells and uses
Reception method and reception apparatus
Providing user interfaces and window previews for hosted applications
Image processing apparatus, control method for the same, and storage medium
Methods and systems to accomplish variable width data input
  Randomly Featured Patents
Architecture for high temperature superconductor wire
Transmission tower devices for reducing longitudinal shock loads
Method and switch for routing data packets in interconnection networks
Fast optical modulator
Cable management device
Method for providing remote emulation of the functionality of a private exchange
Propylene homopolymers and methods of making the same
Microparticles, microparticle dispersion and method and apparatus for producing the same
Conductor paste for ceramic substrate and electric circuit