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7622838 |
Axial fan motor
An axial fan motor comprising: a fan having a rotating shaft and composed of a hub and a plurality of vanes provided around the hub, the fan rotating to generate an air flow; a stator substrate set...
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7622837 |
Hydrodynamic bearing device and spindle motor having the bearing device, and recording and/or reproducing apparatus using the spindle motor
A set of radial dynamic pressure generating grooves constitute a radial bearing, and an entire width (L) of the radial dynamic pressure generating groove is reduced. A set of thrust dynamic...
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7619340 |
Drive unit with a rotationally fixed bearing element
The invention relates to a drive unit ( 10 ) and to a method for producing said drive unit, especially for adjusting mobile parts in a motor vehicle. Said drive unit comprises a drive shaft ( 12 ),...
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7619339 |
Fluid dynamic bearing assembly for directing bubbles
The present invention pertains to a fluid dynamic bearing assembly for directing bubbles. The assembly includes a stator with a stator bearing surface. A rotor with a rotor bearing surface rotates...
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7615903 |
Structural support member for electric motor/generator in electromechanical transmission
An electromechanical transmission is provided with a structural support member that supports a motor/generator in a space efficient way; particularly, the motor/generator is supported from one side...
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7612477 |
Electromagnetic brake device for small-sized motor
An electromagnetic brake device ( 3 ) is assembled to a rear end section of a small-sized motor ( 1 ). The electromagnetic brake device ( 3 ) has a rotating disc ( 11 ) fixed to a motor rotation...
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7612476 |
Motor
One preferred embodiment of the present invention provides a motor composed at least of a stator, a rotor, and a dynamic pressure bearing having a thrust dynamic pressure bearing portion and a...
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7611338 |
Tandem ESP motor interconnect vent
An electrical submersible well pump assembly has upper and lower motors that are filled with oil. During installation in a well, the upper motor lowers into engagement with the lower motor. The...
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7608958 |
Motor mounted with improved dynamic pressure fluid bearing mechanism
A motor is composed of a rotor and a stator. The rotor includes a shaft, a hub having a cylindrical wall and a thrust ring. The stator includes a motor base, an inner seal and a sleeve having a...
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7608957 |
Spindle motor with oil impregnated bearings and a shaft with a groove
A spindle motor can include a base, a bearing housing supported by the base, a bearing installed in the bearing housing, where oil is impregnated in the bearing, a rotating shaft rotatably...
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7608956 |
Automotive engine starter and electric rotary machine designed to withstand vibrational impact
An electric rotary machine which may be employed as a dc motor in an automotive engine starter. The motor includes an armature equipped with an armature shaft, a commutator, brushes, and a bearing...
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7608951 |
Fully redundant spacecraft power and attitude control system
An energy storage flywheel system for a spacecraft is implemented with a fully redundant rotating group and gimbal actuator. In particular, the gimbal actuator, motor/generator, primary bearings,...
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7608950 |
Traction motor shaft connected to vehicle ground via drive gear
In order to prevent bearing currents, particularly in converter-operated traction motors ( 1 ), the housing ( 11 ) is grounded via a grounding capacitor (C ground ).
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7605509 |
Rotor shaft of a spinning rotor
A rotor shaft of a spinning rotor has an annular magnet bearing component which is secured from the centrifugal force effective during the spinning process by means of a ring liner, for radially...
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7605508 |
Electrical machine with support of the rotor on an end face of the stator
An electrical machine has a stator, a rotor, which features a rotor shaft, and at least one bearing for the rotor. The bearing is supported on a bearing block, which in its turn rests on an end...
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7602582 |
Fluid dynamic bearing system
The bearing system according to the invention comprises a sleeve-shaped first bearing disk having a bore concentric to a rotational axis, a cylindrical shaft disposed in the bore and connected to...
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7602091 |
Positioning apparatus and exposure apparatus
A positioning apparatus includes a beam which is driven in a first direction that is perpendicular to the longitudinal direction of the beam, a movable member which surrounds at least a part of the...
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7600311 |
Method for producing a magnetically excitable core comprising a core winding for an electric machine
A method for producing a magnetically excitable core for an electrical machine, by which in a method step (S 1 ), the core, having a substantially parallelepiped shape with slots extending parallel...
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7599615 |
Motor structure with built-in lens
A motor structure with a built-in lens includes a lens mount ( 10 ), a motor ( 30 ) received in the lens mount, and a lens unit ( 50 ) received in the lens mount and driven by the motor to...
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7598644 |
Buffer structure for heat dissipating fan
A heat dissipating fan includes a housing ( 201 ), a stator ( 21 ), a rotor ( 27 ) and a buffer structure. The housing defines an accommodating space ( 202 ) and includes a hollow tube ( 201 b )....
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7598643 |
Motor with electrodynamically and hydrodynamically supported rotor
An apparatus includes a rotor, a stator, and a plurality of magnets forming bearing poles coupled to a selected one of the stator or the rotor. The apparatus further includes a plurality of shorted...
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7598642 |
Axial impact liner
An axial impact liner comprises a bearing liner having a shear member and a pocket. A spring and a supply of oil may be included within the pocket. In the event of an axial load, such as from a...
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7598641 |
Electrical machine with preloaded ball race and method for manufacturing the same
An electrical machine with a ball race preloaded by elastic deformation of a bearing end plate as well as a method for manufacturing the same comprises a stator and a rotor with rotor shaft. The...
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7592726 |
Electric machine comprising an axial spring-loaded element
The present invention relates to an axial spring element, and an electric machine ( 10 ), in particular for driving functional elements in a motor vehicle, with a rotor shaft ( 12 ), which is...
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7589448 |
Automotive alternator having flexible bearing cover
According to the present invention, there is provided an automotive alternator which includes a rotor, a stator, a rolling bearing, and a bearing cover. The rotor includes a rotary shaft and works...
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7589447 |
High speed aerospace generator resilient mount
Centering rings may be used to modify the combined resonance of a rotor and its support assembly to migrate the rotor critical speeds such that they can be engineered out of the rotor operating...
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7586228 |
Stator of an electric motor
The invention relates to a stator of an electric motor, comprising a laminated stator core ( 1 ) which is provided with electrical insulation ( 8 ) composed of plastic, and a stator bushing ( 3 )...
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7586223 |
Ultra-thin spindle motor having groove formed on the outer circumferential surface of thrust bearing
An ultra-thin spindle motor having a groove formed on the outer circumferential surface of a thrust bearing is disclosed. The present invention relates to an ultra-thin spindle motor among...
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7582996 |
Dynamic pressure bearing motor
A magnet ( 13 ) for trapping abraded powder is disposed in a connecting passage between an opening of a sleeve and an opening of a hydrodynamic bearing motor, and a shaft ( 3 ), a sleeve ( 4 ), a...
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7579741 |
Automotive dynamoelectric machine
A rear-end bearing accommodating portion that has a floored cylindrical shape is formed integrally on a rear bracket. A brush apparatus is mounted to the rear bracket by mounting a slinger portion...
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7579728 |
Electric drive with expandable catch and protective device
An electric drive for an electric motor. The electric drive is made up of components consisting of a brush holder plate and a bearing plate which are interconnected via at least one snap-on...
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7576463 |
Magnetic bearing device and magnetic bearing spindle device
A control device includes a differential amplifying circuit for obtaining a difference between values of exciting currents (exciting voltage values) supplied to a pair of axial electromagnets and a...
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7573166 |
Rotary electric machine equipped with bearing structure providing enhanced resistance to thrust load
A rotary electric machine which may be used as a starter motor in an engine starter. The rotary electric machine includes a bearing which retains an armature shaft rotatably. The bearing is...
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7573165 |
Compressor and driving motor assembly
In a compressor and driving motor assembly, the driving motor is a hybrid permanent magnet motor and/or has a rotor mounted directly on the drive shaft of the compressor, the drive shaft acting as...
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7568409 |
Hybrid orbiting spindle for shaping non-circular holes
A machine tool assembly includes a high speed rotating spindle for forming extremely precise surface contours on a work piece. The spindle is supported on a spherical air bearing about its center...
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7567003 |
Cooling fan
A cooling fan includes a fan housing ( 30 ) having a central tube ( 34 ) extending upwardly thereof, a bearing ( 60 ) received in the central tube, a stator ( 20 ) mounted around the central tube,...
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7564155 |
Bearing unit and motor
Herein disclosed a bearing unit including: a dynamic pressure fluid bearing adapted to receive a rotary shaft inserted thereinto; a unit main body surrounding the outside of the fluid bearing; a...
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7564154 |
Disk storage device with brushless DC drive motor and slide bearing assembly
A compact disk storage device having an outer-rotor dc-brushless electric motor for directly driving a disk for recording and reproducing information, having an axially deep, tank-form flange and a...
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7557480 |
Communicating magnetic flux across a gap with a rotating body
An electromagnetic actuator includes a body having a rotational axis, a first pole adjacent an end facing surface of the body, and a second pole adjacent a lateral facing surface of the body. The...
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7557479 |
Electric fan with bearing
An electric fan includes a fan base ( 10 ), a bearing ( 40 ) and a rotor assembly ( 20 ). The fan base forms a center tube ( 11 ) receiving the bearing therein. The center tube has a wall and a...
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7556112 |
In-wheel motor system
An in-wheel motor system, wherein the non-rotating side case of a motor and a knuckle are connected to each other by a motor attachment plate ( 11 ), a knuckle attachment place ( 12 ), and a damper...
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7550887 |
Spindle motor and method of manufacturing spindle motor
A spindle motor in which a rotor is rotatably supported via a pair of upper and lower bushes fixed to a shaft. In a part of the rotor, upper and lower covers are fixed so as to face the upper and...
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7550884 |
Brushless motor
A cutout portion is formed at an outer peripheral side of a stator placing portion provided in a bearing bush for placing a core back portion of a stator. A connecting wire portion of a coil of the...
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7548004 |
Passive levitation in alternating magnetic fields
Stable levitation of an object in an alternating magnetic field can be achieved by eliminating coupling between the rotational and translational forces acting on the object. Stable levitation can...
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7548003 |
External-rotor motor having a stationary bearing shaft
An improved drum motor, preferably electronically commutated, features a unitary stationary central shaft ( 18 ) supporting a stationary inner stator ( 52 ), and an external rotor ( 49 ), including...
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7547998 |
Aligning apparatus including an attraction preventing plate provided between permanent magnet and magnetic member
An aligning apparatus includes a moving member, a magnetic member arranged vertically above the moving member, a stator unit which is arranged vertically below the moving member and has a plurality...
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7545066 |
Jacketed active magnetic bearing
The jacketed active magnetic bearing is applied to a rotary machine having a rotor in contact with a process gas and placed in a leaktight enclosure. The magnetic stator is protected by a first...
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7545065 |
Spin-stabilized magnetic levitation without vertical axis of rotation
The symmetry properties of a magnetic levitation arrangement are exploited to produce spin-stabilized magnetic levitation without aligning the rotational axis of the rotor with the direction of the...
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7541713 |
Heat sink
A heat dissipating fan comprises a base unit having an axial sleeve, a dynamic bearing having a shaft section, a stator unit securely around the axial sleeve and a rotor unit. The rotor unit has a...
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7541709 |
Ultra-thin motor structure
An ultra-thin motor structure including a stator assembly and a rotator assembly is provided. The stator assembly includes at least one bearing with a bore, a base, and a winding plate. The base...
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