Resources Contact Us Home
Dynamic pressure gas bearing structure and method of manufacturing the same as well as method of using the same

Image Number 5 for United States Patent #5944427.

A cross-sectional shape of a shaft body 1 perpendicular to its axis O has a shape defined by a closed curve having a plurality of maximal points M.sub.1, M.sub.2 and M.sub.3 whose distances from the axis are maximized about the axis O and a plurality of minimal points N.sub.1, N.sub.2 and N.sub.3 whose distances from the axis are minimized. This cross-sectional shape has a groove forming region provided with one groove 1b.sub.1 at least between the maximal points M.sub.1 and M.sub.2. When a bearing body 2 rotates on a CCW side with respect to the shaft body 1, the groove 1b.sub.1 is so arranged that an outer peripheral length a.sub.1 in the forward rotational direction exceeds an outer peripheral length b.sub.1 in the reverse rotational direction. Thus, a dynamic pressure gas bearing structure which can prevent galling of the shaft body and the bearing body by shifting the shaft body and the bearing body to a noncontact state at a low rotational frequency is obtained

  Recently Added Patents
Electric train drive control device
Micro vein enhancer
Semiconductor device having germanium active layer with underlying parasitic leakage barrier layer
Pet grooming brush and vacuum attachment
Semiconductor IC including pulse generation logic circuit
Method and system for determining a suppression factor of a suppression system and a lithographic apparatus
  Randomly Featured Patents
BSM problem analysis method
Method and apparatus for a wafer carrier having an insert
Multi-dose syringe driver
Safety device to hold the extractable pins used for hooking pamphlets, brochures and the like within a collecting container
Semiconductor memory device and programming method thereof
Organic light emitting diode display device and driving method thereof
Process for the removal of mercaptans and hydrogen sulfide from hydrocarbon streams
Portable garage with ballast-containing walls
Method for producing solid-lipid composite drug particles
Writing implement and clip for writing implement having an arm mounted magnifying lens