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
Method and apparatus for selective decoding in a wireless communication system
Arrays of optical confinements and uses thereof
Method of forming a power supply controller and structure therefor
Navigational cube for matching vendor offerings to service provider requirements
Preferential selection of candidates for delta compression
Image sensor pixels with junction gate photodiodes
Device and method for quantizing and inverse quantizing LPC filters in a super-frame
  Randomly Featured Patents
Combined high speed optical profilometer and ellipsometer
Doped stoichiometric lithium niobate crystals and method for high-speed holographic data storage
Stethoscope-type recording system with stretched-in-time playback
Ethylene interpolymer polymerizations
Ruffling slide and method for making same
Process for rapidly curing a brominated fluoroelastomer
Method of reversing immunosuppression in vaccines
Combining speculative physics modeling with goal-based artificial intelligence
Differential case and push-frame assembly
Mechanical setting tool