| Patent Number |
Title Of Patent |
Date Issued |
| 7059052 |
Hydrodynamic type porous oil-impregnated bearing |
June 13, 2006 |
| The porous oil-impregnated bearing 1 comprises a bearing body 1a made of a porous material, and oil retained in the pores of the bearing body 1a by impregnation with lubricating oil or lubricating grease. The inner peripheral surface of the bearing body 1a is formed with a bearing su |
| 6981797 |
Hydrodynamic bearing unit |
January 3, 2006 |
| The squareness of the both end surfaces of the flange portion with respect to the outer circumference of the shaft portion of the shaft member is set to 0.001 mm or less respectively, and the flatness of both end surfaces of the flange portion is set to 0.001 mm or less respectively. |
| 6843602 |
Hydrodynamic bearing unit |
January 18, 2005 |
| A hydrodynamic bearing unit is provided, by which the touch between oil and a sealing member in a housing is prevented to prevent oil leakage. A bearing member made of a sintered lubricant-containing metal is disposed along the inner periphery of the housing and a spindle is supported in |
| 6789320 |
Method of producing a sintered oil retaining bearing |
September 14, 2004 |
| There is provided a sintered oil retaining bearing that secures the stability of an oil film and achieves high running accuracy through management to exclude a variation in the size of surface openings in the bearing surface, particularly the presence of large holes, while making use |
| 6712514 |
Hydrodynamic bearing unit |
March 30, 2004 |
| The squareness of the both end surfaces of the flange portion with respect to the outer circumference of the shaft portion of the shaft member is set to 0.001 mm or less respectively, and the flatness of both end surfaces of the flange portion is set to 0.001 mm or less respectively. The |
| 6672767 |
Dynamic bearing device and motor having the same |
January 6, 2004 |
| In the dynamic bearing device, a chamfer having a larger percentage of surface openings is continuous to the outer diameter side of a lower end surface of a bearing member, which constitutes a thrust bearing gap of a first thrust bearing part. A lubricating oil in pores of the bearing |
| 6533460 |
Hydrodynamic type porous oil-impregnated bearing |
March 18, 2003 |
| The porous oil-impregnated bearing 1 comprises a bearing body 1a made of a porous material, and oil retained in the pores of the bearing body 1a by impregnation with lubricating oil or lubricating grease. The inner peripheral surface of the bearing body 1a is formed with a bearing surfac |
| 6513980 |
Hydrodynamic type porous oil-impregnated bearing |
February 4, 2003 |
| The porous oil-impregnated bearing 1 comprises a bearing body 1a made of a porous material, and oil retained in the pores of the bearing body 1a by impregnation with lubricating oil or lubricating grease. The inner peripheral surface of the bearing body 1a is formed with a bearing surfac |
| 6513979 |
Hydrodynamic oil-impregnated sintered bearing unit |
February 4, 2003 |
| A hydrodynamic oil-impregnated sintered bearing unit 1 are comprised a hydrodynamic oil-impregnated sintered bearing 1a, a housing 1b, and a thrust bearing portion for thrust-supporting a shaft. A sealing washer 20 made of metal or resin material is arranged on an opening-portion side of |
| 6357920 |
Sintered oil retaining bearing and spindle motor for information equipment |
March 19, 2002 |
| There is provided a sintered oil retaining bearing that secures the stability of an oil film and achieves high running accuracy through management to exclude a variation in the size of surface openings in the bearing surface, particularly the presence of large holes, while making use |
| 6299356 |
Hydrodynamic type porous oil-impregnated bearing |
October 9, 2001 |
| The porous oil-impregnated bearing 1 comprises a bearing body 1a made of a porous material, and oil retained in the pores of the bearing body 1a by impregnation with lubricating oil or lubricating grease. The inner peripheral surface of the bearing body 1a is formed with a bearing surfac |
| 6250807 |
Hydrodynamic type bearing and hydrodynamic type bearing unit |
June 26, 2001 |
| A thrust bearing section (14) is constituted by one bearing end face (11f1) of a hydrodynamic type oil-impregnated sintered bearing (11) and a flange portion (13a) provided on a rotating shaft (13). The squareness between the bearing end face (11f1) and the bearing inner periphery (11h) |
| 6023114 |
Spindle motor and rotating shaft supporting device for spindle motor |
February 8, 2000 |
| Bearing 1 comprises a porous bearing body 1a having a bearing surface 1b disposed to oppose an outer circumferential surface of the rotating shaft 3 via a bearing clearance 4, a lubricating oil or lubricating grease impregnated in the bearing body 1a, and hydrodynamic pressure generating |
| 5941646 |
Hydrodynamic type porous oil-impregnated bearing and bearing device |
August 24, 1999 |
| Two bearing bodies 1 each having a bearing surface 17 are force-fitted into a housing 7 which is opened at one end and closed at the other end thereof, and a shaft 2 (rotary shaft) is inserted in the bearing bodies 1, thereby forming two axially spaced porous oil-impregnated bearings A. |
| 5762423 |
Bearing device, solid resin lubricating composition and porous oil-impregnated bearing |
June 9, 1998 |
| A bearing device wherein a porous body is formed with a bearing surface (5a) which comes in slide contact with the slide surface of a shaft (3) to be supported, while a porous oil-impregnated bearing (5) impregnated with a lubricating oil or lubricating grease and a solid resin lubricati |
| 5704718 |
Sintered oil-impregnated bearing and method for manufacturing same |
January 6, 1998 |
| Oil-impregnated sintered bearing has a bearing bore with axially extending grooves formed therein so that in a cross-section of the bearing bore concave and convex portions alternate in the circumferential direction, the surface porosity of the convex portions being preferably larger tha |
| 5697709 |
Dynamic pressure type bearing device |
December 16, 1997 |
| A dynamic pressure type bearing comprises a sleeve rotatably holding a shaft driven by a motor composed of a rotor and a stator, one or both of the sleeve and the shaft being made of a resin material. The sleeve and/or shaft of a resin material may have a thin film of oil or grease forme |
