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Class Information
Number: 384/133
Name: Bearings > Rotary bearing > Plain bearing > With specified seal > Fluid barrier > Magnetic fluid
Description: Subject matter wherein the sealing barrier is a liquid which contains magnetic properties.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7129609 |
Magneto-fluidic seal with wide working temperature range |
Oct. 31, 2006 |
| 7011970 |
Automatic bio-manipulation factory system for manipulating a single cell |
Mar. 14, 2006 |
| 7005768 |
Dynamic bearing device, producing method thereof, and motor using the same |
Feb. 28, 2006 |
| 6851638 |
Rotation support structure for dual-bearing reel |
Feb. 8, 2005 |
| 6851859 |
Bearing unit, production method therefor and spindle motor |
Feb. 8, 2005 |
| 6787954 |
Spindle motor |
Sep. 7, 2004 |
| 6722657 |
Low torque seal assembly with open cell filter media |
Apr. 20, 2004 |
| 6558042 |
Bearing guided ferrofluid seal and seal carrier |
May. 6, 2003 |
| 6305694 |
Ferrofluid sealing device |
Oct. 23, 2001 |
| 6119553 |
Rotation transmitting device |
Sep. 19, 2000 |
| 6020664 |
Electric spindle motor |
Feb. 1, 2000 |
| 5973878 |
Recording disk apparatus and rotational supporting structure therefor, having a magnetic lubricant seal which is inclined |
Oct. 26, 1999 |
| RE36202 |
Disk spindle motor |
Apr. 27, 1999 |
| 5828795 |
Sealing device for use in a motor |
Oct. 27, 1998 |
| 5810481 |
Oil retaining bearing unit and motor having oil retaining bearing unit |
Sep. 22, 1998 |
| 5793135 |
Flat type brushless motor |
Aug. 11, 1998 |
| 5789836 |
Motor having dynamic pressure bearing device |
Aug. 4, 1998 |
| 5778948 |
Method for inserting a fluid in a bearing device |
Jul. 14, 1998 |
| RE35718 |
Bearing apparatus |
Jan. 27, 1998 |
| 5676472 |
Rotary labyrinth seal |
Oct. 14, 1997 |
| 5667309 |
Bearing seal system |
Sep. 16, 1997 |
| 5653541 |
Disk driving motor |
Aug. 5, 1997 |
| 5645355 |
Bearing unit |
Jul. 8, 1997 |
| 5628569 |
Fluid bearing unit and manufactured method thereof |
May. 13, 1997 |
| 5417507 |
Vertical motor, method of manufacturing same, polygon mirror motor using said motor, and bearing device for use in said motor |
May. 23, 1995 |
| 5372432 |
Dynamic pressure bearing assembly |
Dec. 13, 1994 |
| 5323076 |
Disk spindle motor |
Jun. 21, 1994 |
| 5256952 |
Magnetic bearing control method and apparatus |
Oct. 26, 1993 |
| 5238254 |
Ferrofluid seal apparatus |
Aug. 24, 1993 |
| 5165701 |
Magnetic fluid seal apparatus |
Nov. 24, 1992 |
| 5161900 |
Self-contained low power fluid bearing and bearing seal |
Nov. 10, 1992 |
| 5155640 |
Disk spindle motor cap |
Oct. 13, 1992 |
| 5134331 |
Spindle motor |
Jul. 28, 1992 |
| 5110141 |
Spindle assembly |
May. 5, 1992 |
| 5108198 |
Magnetic fluid bearing apparatus and motor having magnetic fluid bearing apparatus |
Apr. 28, 1992 |
| 5059039 |
Magnetic bearing bushing |
Oct. 22, 1991 |
| 5054939 |
Magnetic sliding bearing |
Oct. 8, 1991 |
| 5052823 |
Magnetic bearing bushing I |
Oct. 1, 1991 |
| 5036235 |
Brushless DC motor having a stable hydrodynamic bearing system |
Jul. 30, 1991 |
| 5032751 |
Magnetic fluid bearing |
Jul. 16, 1991 |
| 5011165 |
Sealing device especially for hard disk drives |
Apr. 30, 1991 |
| 5005639 |
Ferrofluid piston pump for use with heat pipes or the like |
Apr. 9, 1991 |
| 4995622 |
Magnetic fluid seal device |
Feb. 26, 1991 |
| 4967831 |
Ferrofluid piston pump for use with heat pipes or the like |
Nov. 6, 1990 |
| 4955731 |
Bearing equipment for vacuum devices |
Sep. 11, 1990 |
| 4938611 |
Bearing apparatus |
Jul. 3, 1990 |
| 4919550 |
Bearing assembly |
Apr. 24, 1990 |
| 4883367 |
Bearing unit |
Nov. 28, 1989 |
| 4842426 |
Bearing assembly |
Jun. 27, 1989 |
| 4824122 |
Compact magnetic fluid low pressure seal |
Apr. 25, 1989 |
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