| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 384120000 | Circumferential groove in outer member | 10 |
| 20090060404 | MECHANICAL LOCK FOR ROLLING MILL OIL FILM BEARING - An oil film bearing is seated on the tapered neck of a rolling mill roll by a hydraulically actuated piston/cylinder unit. The piston/cylinder unit is axially confined by externally threaded locking arms seated in a groove in the roll neck. A locknut is threaded onto the locking arms. | 03-05-2009 |
| 20090110337 | Fluid bearing having improved wear properties - A radial fluid bearing having improved wear properties in the operating state of start-up and run-down, the bearing pattern being formed in the region between a bearing bush and a shaft engaging through the bearing bush and consisting of a plurality of grooves disposed at a distance from one another, characterized in that at least the groove depth of the radial bearing is made smaller than that of the prior art, a groove depth of less than 3 micrometers being preferred. | 04-30-2009 |
| 20120230618 | FLUID DYNAMIC BEARING DEVICE - A weld line formed by injection molding of a sealing member is formed at a circumferential position out of deepest portions of axial grooves, which form thinned portions of the sealing member (optimally, in a region of a cylindrical surface between the axial grooves in a circumferential direction). Thus, the sealing member is prevented from being provided with parts having locally markedly low strength, and hence damage to be caused by press-fitting is prevented. | 09-13-2012 |
| 20130148918 | METHOD MANUFACTURING OF FLUID DYNAMIC BEARING USING CUTTING TOOL THAT PERFORMS MICRO ALTERNATING DRIVE, FLUID DYNAMIC BEARING MANUFACTURED BY USING THE METHOD, AND DISK DRIVE DEVICE USING THE BEARING - A method manufacturing of a fluid dynamic bearing includes: forming a substantially linear groove having a length corresponding to a circumferential direction width of the dynamic pressure groove formed on the inner circumferential surface of a shaft housing hole portion, along the circumferential direction of a surface orthogonal to a first processing direction along the central axis direction of a work, by a byte that performs a micro alternating drive in a second processing direction orthogonal to the first processing direction; and extending the dynamic pressure groove that extends in the first processing direction by continuously forming the substantially linear grooves in the first processing direction by displacing the relative positions of the work and the byte in the first processing direction. | 06-13-2013 |
| 20130163903 | HYDRODYNAMIC BEARING ASSEMBLY AND SPINDLE MOTOR INCLUDING THE SAME - There is provided a hydrodynamic bearing assembly including: a sleeve fixed to a base member and having a depression groove formed in a lower end portion thereof; and a shaft rotatably supported by the sleeve and having a stopper inserted in the depression groove, wherein the stopper includes a movement suppressing part provided on an outer peripheral surface thereof in order to suppress movements of a lubricating fluid. | 06-27-2013 |
| 20130259413 | MOTOR INCLUDING RESERVOIR AND HUB CAP - Provided herein is an apparatus, including a stationary component; a rotatable component; a fluid dynamic bearing defined by the stationary component and the rotatable component; a first channel substantially parallel to the fluid dynamic bearing; a second channel substantially perpendicular to the first channel; and a fluid reservoir substantially parallel to the first channel, wherein the second channel fluidly connects the fluid reservoir to the first channel. | 10-03-2013 |
| 20140314351 | FLUID DYNAMIC PRESSURE BEARING OIL, FLUID DYNAMIC PRESSURE BEARING USING THE SAME, AND SPINDLE MOTOR - It is provided a long life spindle motor that is excellent in startup characteristic in low-temperature environments such as 0° C., and that startup problems due to the evaporation or deterioration of lubricating oil can be avoided in high-temperature environments. The spindle motor includes a fluid dynamic bearing filled with a lubricating oil, containing a methyl pentanediol diester obtained by esterifying 3-methyl-1,5-pentanediol with n-decanoic acid and n-undecanoic acid at a molar ratio ranging from 90:10 to 20:80, and having a water content of not more than 1000 ppm. | 10-23-2014 |
| 20140376842 | GAS BEARING ASSEMBLY FOR AN EUV LIGHT SOURCE - A gas bearing assembly including: a stator, a spindle rotatable about an axis, a first space between the spindle and the stator and arranged to receive a bearing gas at a first pressure, to support rotation of the spindle about the axis, a first annulus, in the stator or the spindle and arranged to vent the bearing gas from a first portion of the first space, a second annulus, in the stator or the spindle, and arranged to transport a barrier gas, at a second pressure, into a second portion of the first space, and a third annulus, in the stator or the spindle, the third annulus disposed between the first and second annuli and arranged to transport the bearing gas and the barrier gas out of a third portion of the space to a create, in the third portion, a third pressure less than the first and second pressures. | 12-25-2014 |
| 20150016760 | Hydro Dynamic Bearing Device - A hydro dynamic bearing device comprising an upper half of a main bearing and a lower half of the main bearing, wherein the upper half of the main bearing is lined with a low-strength metal such as a Babbitt metal, wherein a circumferential groove is formed in the lower half of the main bearing, and wherein the low-strength metal of the upper half of the main bearing, which is formed at a region opposed to a downstream side of the circumferential groove formed in the lower half of the main bearing, is partially removed to cause a high-strength bearing base metal to be partially exposed. | 01-15-2015 |
| 20160131185 | Hydro Dynamic Bearing Device - A hydro dynamic bearing device comprising an upper half of a main bearing and a lower half of the main bearing, wherein the upper half of the main bearing is lined with a low-strength metal such as a Babbitt metal, wherein a circumferential groove is formed in the lower half of the main bearing, and wherein the low-strength metal of the upper half of the main bearing, which is formed at a region opposed to a downstream side of the circumferential groove formed in the lower half of the main bearing, is partially removed to cause a high-strength bearing base metal to be partially exposed. | 05-12-2016 |
