Quotables
"The radio craze will die out in time."
Thomas Edison ; 1922
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7736061 | Fluid dynamic bearing motor, and recording-medium driving apparatus A fluid dynamic bearing has pressure-generating grooves provided in opposed thrust surfaces of a thrust bearing portion opposite a circular plate and a stopper to direct a working fluid from inner and outer peripheral edges of the thrust bearing portion toward a rad... | 06/15/2010 |
| 7290935 | Bearing assembly with bearing sleeve having end bearing members A ceramic bearing assembly includes a shaft (20), and a bearing sleeve (10) rotatably receiving the shaft. The bearing sleeve includes an inside wall. First and second bearing blocks (120, 140) are formed at the inside wall at first and second e... | 11/06/2007 |
| 7234868 | Radial pumping oil seal for fluid dynamic bearing motor An improved rotational motor, such as a spindle motor for a disc drive, is provided. The motor first comprises a hub having a shaft portion and a horizontal body portion. The motor also comprises a sleeve surrounding the shaft portion of the hub. A fine first vertic... | 06/26/2007 |
| 7210850 | Hydrodynamic bearing device, spindle motor and hard disk driving apparatus having the hydrodynamic bearing device A hydrodynamic bearing device includes a sleeve having a bearing bore substantially at a center portion, a shaft inserted in the bearing bore in a rotatable manner, a thrust plate for supporting an end of the shaft in the thrust direction and an upper retaining port... | 05/01/2007 |
| 7131770 | Hydro fill controlling shield and sleeve for a hydrodynamic bearing A hydrodynamic bearing system, having a bearing sleeve and a shaft inserted into an inner cylindrical bore of the bearing sleeve. A bearing gap is formed between the shaft and the bearing sleeve, the bearing gap being filled with a lubricating oil. A shield encloses... | 11/07/2006 |
| 7125170 | Fluid dynamic bearing motor Provided is a fluid dynamic bearing motor in which a rotor is rotatably supported by forming an oil gap between the rotor and a stator to form a fluid dynamic pressure bearing and a plurality of oil grooves are formed in a surface of the rotor or stator forming the ... | 10/24/2006 |
| 7125169 | Hydrodynamic pivot bearing The present invention provides a bearing comprised of a hydrodynamic bearing and a pivot bearing, which can be used with a spindle motor. It also provides a spindle motor utilizing a hydrodynamic bearing and a pivot bearing. ... | 10/24/2006 |
| 7090401 | Grooving pattern for grooved fluid bearing A fluid dynamic bearing is provided having two surfaces rotatable with respect to each other, a lubricating medium located in a gap between the two surfaces during rotation of the bearing, and an interrupted and offset groove pattern formed on one of the two surface... | 08/15/2006 |
| 7011450 | Fluid dynamic bearing device and motor including the device A fluid dynamic bearing device including a shaft having an interior pressure regulating hole by which a center portion of a thrust surface confronting a thrust plate and a lubricant pool portion of an inner circumferential surface of a sleeve are communicated with e... | 03/14/2006 |
| 7008110 | Hydrodynamic pivot bearing The present invention provides a bearing comprised of a hydrodynamic bearing and a pivot bearing, which can be used with a spindle motor. It also provides a spindle motor utilizing a hydrodynamic bearing and a pivot bearing. ... | 03/07/2006 |
| 7009310 | Autonomous power source An autonomous power source comprises a power harvester mounted on a movable structure. The power harvester includes a coil, a magnet, and a low-friction ferrofluidic bearing in contact with the magnet, arranged such that the magnet and coil move with respect to each... | 03/07/2006 |
| 7004634 | Fluid dynamic bearing asymmetry pressure feedback The present invention relates to the field of fluid dynamic bearings. Specifically, the present invention provides an apparatus and method useful for maintaining axial movement of a rotor in a high speed spindle motor assembly. ... | 02/28/2006 |
| 7001074 | High pressure barrier to oil loss by diffusion An improved rotational motor, such as a spindle motor for a disc drive, is provided. The motor first comprises a hub having a shaft portion and a horizontal body portion. The motor also comprises a sleeve surrounding the shaft portion of the hub. A fine vertical gap... | 02/21/2006 |
| 6998745 | Dynamo-electric machine having a rotor with first and second axially or rotationally displacable field magnets An apparatus for and a method of construction of a spindle motor having a bearing unit, a rotary shaft, a rotary hub member and an electro-magnetic motor is presented. The rotary shaft has a flange attached at a mid-section in an axial direction, between large and s... | 02/14/2006 |
| 6979128 | Spindle motor for hard disc drive A spindle motor for a hard disc drive. The spindle motor includes an oil outflow prevention part mounted at an inner side of an oil inlet, preventing oil from flowing out through the oil inlet, but allowing an outflow of air bubbles that are generated due to gasific... | 12/27/2005 |
| 6966699 | Dynamic pressure bearing device, and manufacturing method and assembly jig thereof It is an object of the present invention to provide a miniaturized, high-precision, easy, and low-cost dynamic pressure bearing device and a manufacturing method thereof. In manufacturing a dynamic pressure bearing device, a first and a second ring-shaped member are... | 11/22/2005 |
| 6955472 | Lubricant reservoir for gas bearing A method and apparatus is provided for allowing a molecularly thin film to be established on a surface of the gas fluid dynamic bearing. The film can be controllably replenished so that the problem of liquid lubricant starvation is overcome. A suitable non-sludging ... | 10/18/2005 |
| 6945697 | Dynamic gas bearing of a motor spindle comprising aeration The invention relates to a dynamic gas mounting of a motor spindle, with a rotating shaft 2 which is gas-mounted in a housing 3 in the radial and axial direction, at least one radial gas bearing 4 being present for radial mounting along the shaf... | 09/20/2005 |
| 6943985 | Spindle motor and hard disk drive A spindle motor for a hard disk drive having a stationary component with a first bearing surface, and a rotating component with a second bearing surface located in opposing relationship with the first bearing surface. The first and the second bearing surfaces form a... | 09/13/2005 |
| 6939046 | Hydrodynamic bearing, spindle motor and hard disk drive A hydrodynamic bearing having a shaft, which is fixedly connected at one end to a rotating component, and a bearing sleeve, which encompasses the shaft at its other free end with a slight clearance. The sleeve and the shaft form a concentric bearing gap. The shaft a... | 09/06/2005 |
| 6933642 | Hydrodynamic gas bearing A rotatable hub in which a supporting shaft having hydrodynamic pressure generating grooves is inserted comprises an annular thrust bearing plate in its lower portion and annular permanent magnets in its upper portion. The thrust bearing plate is inserted between th... | 08/23/2005 |
| 6927515 | Dynamic tilt limiter for fluid dynamic bearings A disc drive data storage system includes a hydrodynamic bearing including a housing having a central axis, a stationary member that is fixed with respect to the housing and coaxial with the central axis, and a rotatable member that is rotatable about the central ax... | 08/09/2005 |
| 6869212 | Rotor/stator type homogenizer Disclosed is a rotor/stator type homogenizer which allows the gap between the rotor and the stator to be set to a very small dimension and which does not involve generation of abrasion particles or the like even if the rotor is rotated at high speed, making it possi... | 03/22/2005 |
| 6834997 | Spindle device using dynamic pressure bearing Disclosed is a spindle device endowed with a sufficient load capacity for bending moment and capable of reducing power loss and heat generation of the main shaft attributable to the radial dynamic pressure bearing. In this spindle device, the rotation of the spindle... | 12/28/2004 |
| 6761483 | Combined radial-axial slide bearing The slide bearing is constructed of, on one hand, a hydrodyamic radial slide bearing (2) which surrounds, with a play, an axle (1) to be beared, such that between the axle (1) and the radial slide bearing (2), a first gap (9) is fo... | 07/13/2004 |
| 6604858 | Hydro dynamic gas bearing and disk drive using the same A hydro dynamic gas bearing having a sleeve with one end closed and connected to a front end of a shaft supported at its proximal end relative to a base on a fixed side, a plurality of hydro dynamic pressure generating grooves on at least one of an outer ... | 08/12/2003 |
| 6457867 | Method and apparatus for replenishing oil in a fluid dynamic bearing using a sleeve groove A method and apparatus for replenishing oil in a fluid dynamic bearing using a sleeve groove. The replenishing groove is formed in the sleeve surrounding the shaft so that centrifugal force drives the oil to move toward the radial bearings.... | 10/01/2002 |
| 6402384 | Hydrostatic axle bearing A drive axle assembly includes a stationary member and a rotating member spaced apart from said stationary member to form a gap. A fluid bearing is formed between the stationary and rotating members by filling the gap with a fluid. The fluid creates a bea... | 06/11/2002 |
| 6371650 | Hydraulic dynamic bearing and spindle motor and rotary assembly provided A double sleeve type dynamic bearing comprises a fixed shaft having at least one end fixedly mountable to an apparatus in which the bearing is utilized, a rotary sleeve arranged coaxially with the fixed shaft so that a first fine gap is formed therebetwee... | 04/16/2002 |
| 6271612 | Spindle motor A spindle motor in which a shaft and a sleeve are supported by a radial fluid bearing and a thrust bearing in a noncontact state via a bearing clearance and are relatively driven rotatively, a lubricant reservoir having one end communicating with the bear... | 08/07/2001 |
| 6267035 | Fiber chopper apparatus and method A chopper for chopping fibers or fiber strands having a back up roll and a blade roll containing blades that work against a peripheral surface of the back up roll and a method of using is disclosed. The chopper has a number of improved features for reduci... | 07/31/2001 |
| 6215217 | Dynamic pressure bearing motor In a motor 5 in which a thrust bearing 8 using the magnetic force acting between a stator 40 side and a rotor 20 side and a radial bearing 7 using the dynamic pressure generated between the outer peripheral surface 440 of a fixed shaft 44 and the inner pe... | 04/10/2001 |
| 6211592 | Motor for driving storage disks A storage-disk drive motor miniaturized and made thinner by eliminating the conventional thrust plate for the rotor-hub thrust dynamic pressure-generating bearing, and by employing only one rotor-hub radial dynamic pressure-generating bearing. The motor i... | 04/03/2001 |
| 6183135 | Single plate hydrodynamic bearing with self-balancing fluid level and fluid circulation A shaft having a thrust plate at or near one end, and a sleeve cooperating with the shaft to define one or more journal bearings and a counterplate (which may be supported by the sleeve or defined by the sleeve) defining at least one counter thrust surfac... | 02/06/2001 |
| 6147424 | Gas dynamic pressure bearing apparatus A gas dynamic pressure bearing apparatus comprises a fixed shaft, a bearing member which is positioned opposite from the fixed shaft and at least a radial gas dynamic pressure bearing portion and a thrust gas dynamic pressure bearing portion which are pos... | 11/14/2000 |
| 6072660 | Disk driving apparatus using dynamic pressure-type bearing device A disk driving apparatus using a dynamic pressure-type bearing device of an oil lubrication type, wherein the bearing device includes a housing main body, a sleeve part fixed to the housing main body, a rotor part relatively rotatable to the housing main ... | 06/06/2000 |
| 6059459 | Hydrodynamic pressure bearing In a hydrodynamic pressure bearing according to the present invention, the lubricating fluid held in the radial bearing portion is pumped toward the thrust bearing portion by grooves formed in the radial bearing portion. And the hydrodynamic pressure bear... | 05/09/2000 |
| 6019515 | Externally pressurized gas bearing assembly An externally pressurized gas bearing assembly including a bearing sleeve fixed in contact with an inner peripheral surface of a housing provided with a gas supply passage communicated with fine feed ports of thrust bearings and opening at an outer periph... | 02/01/2000 |
| 6020664 | Electric spindle motor An electric spindle motor has a base assembly (19) and a hollow notatable hub (16) housing a motor. The hub (16) is mounted for rotation about an axis and a stator (12) is mounted on the base assembly (19) inside the hub (16). A liquid filled journal bear... | 02/01/2000 |
| 5993066 | Fluid retention principle for hydrodynamic bearings A hydrodynamic bearing design is disclosed incorporating a flexible membrane at one end of the fluid gap in the hydrodynamic bearing. If voids exist in the fluid, and if changes in the size of these voids or bubbles occur with changes in temperature or pr... | 11/30/1999 |
