Patent application number | Description | Published |
20080292228 | Shaft Member for Fluid Lubrication Bearing Apparatuses and a Method for Producing the Same - A shaft member for hydrodynamic bearing apparatuses which can restore the pressure balance in a thrust bearing gap formed on both axial sides of the flange portion in an early stage is provided at low costs. | 11-27-2008 |
20090208153 | HOUSING FOR FLUID LUBRICATION BEARING APPARATUSES, A HOUSING FOR HYDRODYNAMIC BEARING APPARATUSES, AND A METHOD FOR PRODUCING THE SAME - A fluid lubrication bearing apparatus which can stably produce high bearing performance is provided at low costs. Moreover, a method for producing a housing for hydrodynamic bearing apparatuses which can improve the accuracy of form of the housing of this type at low costs is provided. | 08-20-2009 |
20100266225 | SHAFT MEMBER FOR FLUID LUBRICATION BEARING APPARATUSES AND A METHOD FOR PRODUCING THE SAME - A shaft member for hydrodynamic bearing apparatuses which can restore the pressure balance in a thrust bearing gap formed on both axial sides of the flange portion in an early stage is provided at low costs. | 10-21-2010 |
20110192210 | SHAFT MEMBER FOR FLUID LUBRICATION BEARING APPARATUSES AND A METHOD FOR PRODUCING THE SAME - A low-cost shaft member for hydrodynamic bearing apparatuses restores the pressure balance in a thrust bearing gap formed on both axial sides of the flange portion in an early stage. A shaft material integrally having a shaft portion and a flange portion with a through-hole between both end faces of the flange portion is formed in a common forging step. As a result, the through-hole is formed to open to an inner diameter side of the bearing gaps avoiding the thrust bearing gaps formed on both end faces of the flange portion of the shaft member as a finished product. | 08-11-2011 |
20110232093 | SHAFT MEMBER FOR HYDRODYNAMIC BEARING APPARATUSES AND A METHOD FOR PRODUCING THE SAME - A shaft material integrally having a shaft portion and a flange portion is formed by a forging process. The end face of the shaft portion of the shaft material and the end face of the flange portion on the opposite side of the shaft portion are ground relative to the corrected face, and the outer circumferential surface of the shaft material is ground relative to the end faces. This renders the cylindricity of the radial bearing faces formed on the outer periphery of the shaft portion of the produced shaft member to be 3 μm or lower. Moreover, a shaft material integrally having the shaft portion and flange portion is formed, while simultaneously thrust hydrodynamic groove regions are formed on both end faces of the flange portion. After the forging process, radial hydrodynamic groove regions are formed on the outer circumferential surface of the shaft portion. | 09-29-2011 |
20110296896 | HOUSING FOR FLUID LUBRICATION BEARING APPARATUSES, A HOUSING FOR HYDRODYNAMIC BEARING APPARATUSES, AND A METHOD FOR PRODUCING THE SAME - A fluid lubrication bearing apparatus which can stably produce high bearing performance is provided at low costs. Moreover, a method for producing a housing for hydrodynamic bearing apparatuses which can improve the accuracy of form of the housing of this type at low costs is provided. | 12-08-2011 |
20120186983 | FLUID DYNAMIC BEARING DEVICE - It is an object of the present invention to provide a bearing member having a highly accurate dynamic pressure generating portion stably at low cost. Dynamic pressure grooves ( | 07-26-2012 |
20130283619 | METHOD FOR PRODUCING A HOUSING FOR A FLUID BEARING APPARATUS - A method for producing a housing for a hydrodynamic bearing apparatus includes forming a housing | 10-31-2013 |