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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 8182154 | Fluid dynamic bearing system The invention relates to a fluid dynamic bearing system that comprises at least one stationary part that has a shaft and two bearing plates disposed on the shaft at a mutual spacing, and at least one rotating part that is supported so as to rotate about a rotational... | 05/22/2012 |
| 8177434 | Fluid dynamic bearing device A fluid dynamic bearing device includes a housing injection molded with a bearing sleeve as an insert. Accordingly, the molding of the housing and the assembly of the housing and the bearing sleeve can be performed in a single step. In addition to this, by simply in... | 05/15/2012 |
| 8167495 | Device comprising a support structure and a rotating shaft and wind turbine A device is provided having a support structure and a rotating shaft having a center axis which rotating shaft and support structure are pivotable supported against each other by at least one hydrodynamic rotary bearing including a first bearing part and a second be... | 05/01/2012 |
| 8128289 | Fluid dynamic bearing device An outer peripheral surface (8d) of a bearing sleeve (8) is formed on a radially inside with respect to a first dynamic pressure generation portion (B1). In this case, it is possible to reduce a thickness of the bearing sleeve (8) ... | 03/06/2012 |
| 8113715 | Fluid dynamic bearing device In this type of fluid dynamic bearing device, a dynamic pressure generating part having high molding accuracy is formed at low cost. A rotating member 2 includes a shaft part 9, and a holding member 10 as a thrust member provided in one e... | 02/14/2012 |
| 8104964 | Fluid dynamic bearing unit A fluid dynamic bearing unit is provided which has a high load capacity against a moment load, whose bearing sleeves can be manufactured and fixed easily, and which can provide a required fixing power. The bearing sleeve is inserted into an inner periphery of a hous... | 01/31/2012 |
| 8104963 | Shaft member for fluid dynamic bearing device Provided is a shaft member for a fluid dynamic bearing device, which is excellent in wear resistance and which can exert a high dynamic pressure effect. A shaft material (11) is rolled to form a recess (7) for causing a dynamic pressure effect of a lub... | 01/31/2012 |
| 8047717 | Bearing positioning structure for motor A bearing positioning structure for a motor includes an axial tube and a positioning member. The positioning member includes a pressing portion and a coupling portion. The coupling portion of the positioning member is engaged with a coupling section of the axial tub... | 11/01/2011 |
| 8016488 | Fluid dynamic bearing device The fluid dynamic bearing device includes a housing, two bearing sleeves fixed to the housing at positions axially spaced apart from each other, and a shaft member inserted along inner peripheries of the bearing sleeves. The housing includes a spacer portion protrud... | 09/13/2011 |
| 8007176 | Dynamic pressure bearing and rotation machine employing same A magnetic fluid is held by a magnetic field in a stationary state and by a centrifugal force during rotation, leaking and splashing of the magnetic fluid caused by the instability of the pumping of a dynamic pressure bearing are prevented without using a magnetic f... | 08/30/2011 |
| 7985025 | Hydrodynamic bearing device A bearing sleeve 8 is press-fitted into a housing 7, and an axial portion 2a of an axial member 2 is inserted into the inner peripheral surface 8a of the bearing sleeve 8, and then a thrust member 10 is ... | 07/26/2011 |
| 7980764 | Through-shaft fluid recirculation for a spindle motor An apparatus and method are described for a fluid dynamic bearing motor as may be utilized in a disc drive memory system. A fluid seal is situated at a first axial end of a bearing, and a grooved pumping seal is situated at a second axial end of the bearing. In an a... | 07/19/2011 |
| 7976221 | System and method for improving lubrication in a fluid dynamic bearing near the contact region A system and method for improving lubrication in a fluid dynamic bearing are disclosed. A fluid dynamic bearing is formed. The fluid dynamic bearing comprises a shaft having an axis of rotation and a surface comprising a first groove at a first depth and a second gr... | 07/12/2011 |
| 7972065 | Hydrodynamic bearing device, spindle motor, and recording and reproducing apparatus equipped with same A hydrodynamic bearing device includes a sleeve having a bearing hole, a shaft, and a flange cover. The shaft is disposed in the bearing hole of the sleeve in a state of being capable of relative rotation, and has a large diameter flange portion. The flange cover is... | 07/05/2011 |
| 7950854 | Hydrodynamic bearing type rotary device and recording and reproducing apparatus equipped with same A hydrodynamic bearing type rotary device includes radial hydrodynamic grooves and thrust hydrodynamic grooves forming communicating channels, communicating holes designed to communicate the groove end of the radial hydrodynamic groove on the side opposite the thrus... | 05/31/2011 |
| 7946769 | Bearing mechanism, spindle motor and data storage medium drive apparatus A bearing mechanism includes a shaft, a bearing portion, and a cover closing a bottom end of the bearing portion. The bearing portion and the cover are preferably connected to one another by laser welding. A surface of a welded portion formed by the laser welding in... | 05/24/2011 |
| 7901138 | Fluid bearing device A fluid bearing device (50B, 50AB) is composed of a shaft (1, 51); a sleeve (9, 59) into which the shaft (1, 51) is inserted; and lubrication fluid (20) intervening in a gap between the shaft (1, 51) and the sleeve ( | 03/08/2011 |
| 7901139 | Hydrodynamic bearing type rotary device In a hydrodynamic bearing type rotary device, relationships between the number of times of intermittence life, a bearing load, lubricating fluid viscosity, a bearing size, and the like are considered in order to provide a hydrodynamic bearing type rotary device whic... | 03/08/2011 |
| 7896550 | Hydrodynamic liquid metal bearing A hydrodynamic liquid metal bearing capable of use in a high temperature environment. The hydrodynamic bearing includes a rotating shaft with a raised portion extending into an annular groove formed within a stationary sleeve, the space formed between the two formin... | 03/01/2011 |
| 7883270 | Hydrodynamic bearing type rotary device and recording and reproducing apparatus including the same A hydrodynamic bearing type rotary device is configured to prevent air from being trapped inside a bearing and causing the bearing to have oil film rupture and NPPR to deteriorate. In the device, a flange having a shape substantially like a disc is provided integral... | 02/08/2011 |
| 7866890 | Spindle motor having a fluid dynamic bearing system The invention relates to a spindle motor having a fluid dynamic bearing system that comprises a base (10), a stationary shaft (14) connected to the base, a hub (16) rotatably supported with respect to the shaft and two bearing plates (24, 44 | 01/11/2011 |
| 7866889 | Fluid dynamic bearing system A fluid dynamic bearing system used particularly for a spindle motor having a shaft that is accommodated in a bearing bush and rotatably supported with respect to the bearing bush, a bearing gap filled with a bearing fluid being located between the shaft and the bea... | 01/11/2011 |
| 7862238 | Hydrodynamic bearing rotary device and information apparatus A hydrodynamic bearing rotary device which can reduce rotation friction, and recording and reproducing apparatus including the same is provided. In the hydrodynamic bearing rotary device, such as hard disc devices, a rotary shaft having a hub on one end is provided ... | 01/04/2011 |
| 7854552 | Hydrodynamic bearing device, spindle motor equipped with same, and recording and reproducing apparatus A hydrodynamic bearing device comprises a sleeve, a shaft, and a flange cover. The sleeve has a bearing hole and a communicating hole which communicates between both end faces. The shaft is disposed in a state of being capable of relative rotation in the bearing hol... | 12/21/2010 |
| 7837390 | Hydrodynamic bearing, motor including the same, and recording and reproducing apparatus A hydrodynamic bearing, a motor including the same, and a recording and reproducing apparatus which can improve vibration resistance property and suppress noises even in a situation where vibration is expected are provided. Radial hydrodynamic grooves formed on an i... | 11/23/2010 |
| 7819586 | Fan with an anti-leakage device for an oily bearing A fan with an anti-leakage device for an oily bearing includes a base, an axial barrel, a fan wheel and a bearing. The axial barrel extends from the base and provides a first end, a second end, a first oil storage groove at the second end. The fan wheel extends a sp... | 10/26/2010 |
| 7798721 | Fluid dynamic bearing device The present invention provides a fluid dynamic bearing device having high durability and capable of being produced at low cost. In the fluid dynamic bearing device, a housing and a disc hub are resin molded parts, and a thrust bearing gap is formed between an upper ... | 09/21/2010 |
| 7758246 | Air purging for a fluid dynamic bearing A robust spindle motor is provided having improved shock resistance for fluid containment, as well as enhanced air purging characteristics. In an aspect, axial displacement of relatively rotating components is restricted by utilizing a limiter situated adjacent to a... | 07/20/2010 |
| 7753590 | Bearing unit and driving motor using the bearing unit A bearing unit includes: a radial bearing for bearing in a circumferential direction of a shaft; a thrust bearing for bearing one end in a thrust direction of the shaft; a housing provided on the outside of the radial bearing and the thrust bearing and filled with a... | 07/13/2010 |
| 7740407 | Hydrodynamic bearing type rotary device and recording and reproduction apparatus including the same To prevent air from being trapped inside a bearing and causing the bearing to have oil film rupture and NRRO to deteriorate. In a hydrodynamic bearing, a first lubricant reservoir is provided in a gap between a lower surface of a hub and a sleeve, and a second lubri... | 06/22/2010 |
| 7699528 | Dynamic bearing device A dynamic bearing device is provided, which can prevent abrasion powder generated when a sealing member is pushed into an inner circumference of a housing from entering the housing. A sealing member is inserted into an inner circumference of an opening of a housing ... | 04/20/2010 |
| 7674043 | Hydrodynamic bearing rotary device An object of the present invention is to provide a hydrodynamic bearing type rotary device which can improve rotation performance, suppress a friction torque, and reduce power consumption of motor, and a recording and reproducing apparatus including the same. A shaf... | 03/09/2010 |
| 7654742 | Hydrodynamic bearing device, motor, recording disc driving apparatus and assembly jig A hydrodynamic bearing device 4 comprises a shaft 41, a second thrust flange 41c, a sleeve 42, a radial bearing 71, and a thrust bearing 73. The second thrust flange 41c is fixed near one end of the shaf... | 02/02/2010 |
| 7654743 | Bearing assembly, motor and recording disk drive A bearing assembly for use in an electric motor minimizes the generation of a negative pressure. In the bearing assembly, gaps are formed between a shaft provided with a flange portion, a ring member mounted on the shaft, and a sleeve member with a through hole form... | 02/02/2010 |
| 7648281 | Fluid dynamic bearing, motor and storage disk device A fluid dynamic bearing is provided. A structure in which a shaft member and an annular member fitted about the shaft member are rotatably supported by a bearing member and an annular member on the bearing member has a fifth gap for storing a lubricating fluid and s... | 01/19/2010 |
| 7645073 | Hydrodynamic bearing device, spindle motor and disc recording and reproducing apparatus A hydrodynamic bearing device which realizes power saving, reduction of a time period necessary for stabilizing rotation, and enhancement in durability to startup and halting of the motor at the same time by accelerating circulation of a lubricant in the vicinity of... | 01/12/2010 |
| 7637663 | Fluid bearing with a variable depth groove A fluid bearing that utilizes a variable depth groove is described. The fluid bearing includes two surfaces that are rotatable relative to one another, with a groove on at least one of the surfaces. The floor of the groove is non-constant in depth. ... | 12/29/2009 |
| 7625125 | Spindle motor The invention relates to a spindle motor having a fluid dynamic bearing system used particularly for driving the storage disks of hard disk drives, having a baseplate, a stationary bearing bush disposed in an opening in the baseplate, a shaft rotatably supported in ... | 12/01/2009 |
| 7625124 | Fluid bearing device While applying an ultrasonic vibration to a housing 7 and/or a bearing sleeve 8, the outer peripheral surface 8d of the bearing sleeve 8 is press-fitted into the inner peripheral surface 7c of the housing 7 wit... | 12/01/2009 |
| 7604409 | Hydrodynamic bearing member and manufacturing method thereof The present invention aims to improve the efficiency of a clamping step for combining a flange with a shaft and to improve productivity. The shaft and the flange are tentatively combined in the tentative clamping step. In the tentative clamping step, a concave part ... | 10/20/2009 |
