Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 8134266 | Electric motor It comprises stator including stator core having yoke and a plurality of teeth protruded from yoke, which is formed with slots between adjacent teeth, and rotor having rotor core and permanent magnet formed with a plurality of magnetic poles, which confronts tip end... | 03/13/2012 |
| 8120222 | Rotating electrical machine A rotating electrical machine includes a stator and a rotor arranged to rotate inside the stator. The rotor includes a plurality of permanent magnets arranged to produce a radial magnetic flux in an airgap between the rotor and the stator. The machine also includes ... | 02/21/2012 |
| 8097993 | Electric motor and/or generator with mechanically tuneable permanent magnetic field Apparatus and method for tuning the magnetic field of brushless motors and alternators to obtain efficient operation over a broad RPM range. The motor or alternator includes fixed windings (or stator) around a rotating rotor carrying permanent magnets. The permanent... | 01/17/2012 |
| 8058763 | Rotor having an inverted U-shaped retainer and magnet carrier A permanent magnet rotor arrangement that is particularly suitable for low-speed large-diameter electrical generators includes a rotor 2 having a radially outer rim 4. A circumferential array of magnet carriers 12 is non-releasably affixed to th... | 11/15/2011 |
| 8030816 | Motor and motor control device A rotor (11) is provided with: a main permanent magnet mounting layer (21) having a plurality of main permanent magnets (21a) mounted thereon; a first sub permanent magnet mounting layer (22) having a plurality of first sub permane... | 10/04/2011 |
| 7863792 | Motor and motor control device A rotor (11) is provided with: a main permanent magnet mounting layer (21) having a plurality of main permanent magnets (21a) mounted thereon; a first sub permanent magnet mounting layer (22) having a plurality of first sub permane... | 01/04/2011 |
| 7821169 | Axial gap type motor A series coupling synchronous axial gap type motor where rotors and stators are alternately stacked with required air gaps in the axial direction of a rotary shaft as a main shaft, is provided. The rotors are fixed to the rotary shaft, and the stators are disposed s... | 10/26/2010 |
| 7432623 | Brushless electromechanical machine An electromechanical machine having a stator and a rotor, the stator including at least one stator module of N toroid shaped electromagnets, the electromagnets arranged along an arc a predetermined distance apart defining a stator arc length. Each of the electromagn... | 10/07/2008 |
| 7402929 | Magnetic motor with magnet assemblies A magnetic motor that includes a plurality of rotor magnet assemblies, a plurality of drive magnet assemblies that are laterally moveable with respect to the rotor magnet assemblies, a timing assembly for generating power pulses selectively supplied to the drive mag... | 07/22/2008 |
| 7388308 | Spindle device A built-in motor type spindle device comprising a housing and a spindle, wherein said spindle device further includes static pressure bearings which support the spindle so that the spindle can rotate freely relatively to the housing, two lines of magnetic field gene... | 06/17/2008 |
| 7372182 | Axial gap alternator associated with a flywheel An axial gap alternator comprises a first carrier associated with or secured to an output shaft of an internal combustion engine. A first carrier carries a first set of magnets arranged radially about a rotational axis. A second carrier carries a second set of magne... | 05/13/2008 |
| 7357128 | Closed loop defined profile current controller for electromagnetic rail gun applications A closed loop current controller for an electromagnetic rail gun. It is necessary to control the muzzle velocity of a rail gun accurately for the gun to be a good artillery device. The present invention provides a closed loop control system to accurately regulate th... | 04/15/2008 |
| 7355310 | Permanent magnet synchronous motor A permanent magnet synchronous motor is of a rotating magnetic field type, and includes a stator which generates a rotating magnetic field, and a rotor having fixed magnetic poles. The rotor includes first and second rotor units arranged axially thereof. The first a... | 04/08/2008 |
| 7321176 | Multi pole electrical machine with reduced cogging force A multi pole electrical machine includes an armature and a stator. The armature is movable in a direction of armature motion with regard to said stator and includes armature pole pairs. These armature pole pairs follow each other in the direction of armature motion.... | 01/22/2008 |
| 7256524 | Axial gap electric motor First and second stators are arranged on mutually spaced positions of an imaginary common axis, and first and second rotors are coaxially and rotatably arranged on mutually spaced positions of the imaginary common axis between the first and second stators. ... | 08/14/2007 |
| 7170212 | Synchronous axial field electrical machine A permanent magnet electrical machine comprises a first substantially planar member (9, 10) and a second substantially planar member (3) arranged substantially parallel to the first substantially planar member. The first and second members are rotatabl... | 01/30/2007 |
| 7167364 | Cooler with blower between two heatsinks A cooler for cooling of electronic components comprises at least two heatsinks thermally connected with each other by heat spreading means, and a double inlet centrifugal blower comprises a casing with two inlets and an outlet, a radial impeller with an axle and an ... | 01/23/2007 |
| 7164216 | Motor A motor includes a stator section with a two-phase structure having first and second stator assemblies disposed in an axial direction, and a plurality of pole teeth arranged at an electrical angle of 90 degrees along inner circumferences of the first and second stat... | 01/16/2007 |
| 7157826 | Axial gap electrical machine An axial gap electrical machine employs unique architecture to (1) overcome critical limits in the air gap at high speeds, while maintaining high torque performance at low speeds, while synergistically providing a geometry that withstands meets critical force concen... | 01/02/2007 |
| 7126309 | Motor The electric machine of the present invention comprises a first coil group containing a plurality of coils and a magnet group. The first coil group is classified into M phase sub coil groups, with the coils of the sub coil groups aligned one at a time in sequence at... | 10/24/2006 |
| 7098566 | Axial gap electrical machine An axial gap electrical machine employs unique architecture to (1) overcome critical limits in the air gap at high speeds, while maintaining high torque performance at low speeds, while synergistically providing a geometry that withstands meets critical force concen... | 08/29/2006 |
| 7091636 | Position-control stage system A position-control stage system is disclosed, which is enhanced in prolusion to turn a turntable relatively to a bed through a bearing and also improved in operating performances including high-speed traveling and high response, even with made as small as allowed in... | 08/15/2006 |
| 7034427 | Selective alignment of stators in axial airgap electric devices comprising low-loss materials An axial gap dynamoelectric machine comprises first and second stators disposed coaxially with an intermediate rotor. The stators are selectively aligned with an axial offset between the positions of their respective teeth and slots. The stators comprise toroidal co... | 04/25/2006 |
| 7030529 | Electrical machines, especially engines excited by permanent magnets A permanent magnet-excited electric motor with a rotating rotor having permanent magnets disposed with alternating polarities in a ring around its circumference, which magnets cooperate with coils of a stator encompassing the rotor. The permanent magnets, as individ... | 04/18/2006 |
| 6982530 | Drive control system Provided is a drive system of a motor structured from a combined arrangement of a plurality of motors capable of reducing losses resulting from mechanical loss during the process of the driving force behind the motor being transmitted. This system has a plurality of... | 01/03/2006 |
| 6954014 | Motor with frequency generator and office automation equipment using same The invention relates to a motor with a frequency generator attached thereto, equipped with the frequency generator (FG) for detecting a rotational speed of the motor. The motor with the frequency generator attached thereto comprises a magnet having 10 poles of main... | 10/11/2005 |
| 6897588 | Brushless motor A brushless motor 1 comprises a rotor 3 having a magnet 2 and a stator 4 having a stator core 8. The stator core 8 has teeth 11 provided at the front ends thereof with auxiliary grooves to realize a pseudo-multi-slot ... | 05/24/2005 |
| 6891295 | Flywheel magneto generator A flywheel magneto generator which comprises a rotor having a magnet attached to an outer circumferential side of a flywheel and a stator constructed by winding a generating coil around a core having a magnetic pole portion opposed to a magnetic pole of the rotor, w... | 05/10/2005 |
| 6858956 | Magnetic pole position detector for rotor A rotor (17, 31, 71, 91, 101, 121, 131, 141, 201, 401) of a motor (13, 51) is provided with a rotation shaft (21, 59, 410) and a plurality of magnets (15, 53, 75, 105, 210A, 210B, 411) on a circular periphery. Plates (25,... | 02/22/2005 |
| 6849982 | Toroidal electrical machine and an annular winding carrier therefor A toroidal AC generator includes an outer casing and an annular stator core of ferromagnetic material which is encased in a hollow annular cover of plastics material and which is fixed to the casing between the discs of a twin disc rotor. Each rotor disc carries a c... | 02/01/2005 |
| 6803691 | Ring-shaped motor core An electrical machine comprises a magnetically permeable ring-shaped core centered on an axis of rotation and having two axially-opposite sides. Coils are wound toroidally about the core and disposed sequentially along the circumferential direction. Each coil includ... | 10/12/2004 |
| 6803738 | Magnetic actuation and positioning Magnetic forces are used as a controlled actuation mechanism to move and position objects of interest. In one embodiment, a first spherical surface has at least one magnetic positioner attached. A second spherical surface is positioned to move relative to the first ... | 10/12/2004 |
| 6776590 | Dynamo electric machines and stators for use in same Dynamo electric machines and stators for use in such machines are provided. The stators comprise plates configured to be substantially flat and a plurality of spaced apart projections or teeth extending away from the plate and, together with the plate defining a plu... | 08/17/2004 |
| 6717313 | Magnetic circuit for rotating apparatus An energy conversion magnetic circuit is constituted with magnet pole pieces of magnets or armatures which are in parallel with respect to the shaft to obtain a dynamic force or an electromotive force. The magnetic circuit for a generator or an electric motor has a ... | 04/06/2004 |
| 6707208 | Flux diode motor An electric motor utilizing permanent magnets, wherein the permanent magnets produce a flux circuit in a first direction and shunt elements whereby the magnets and shunt elements rotate relative to each other wherein the shunt elements sequentially interrupt the mag... | 03/16/2004 |
| 6605883 | Multi-phase flat-type PM stepping motor and driving circuit thereof Disclosed is a multi-phase flat-type PM stepping motor comprising a first motor unit having a first stator unit and a first rotor unit, and a second motor unit having a second stator unit and a second rotor unit. The first stator unit has a plurality of a... | 08/12/2003 |
| 6455969 | Multiple layer double rotor single stator skew symmetry permanent magnet rotating motor A single-stator-double-rotor rotating motor has one upper-layer rotor, one intermediate-layer armature and one lower-layer rotor. The upper-layer rotor and lower-layer rotor are embedded with the same number of magnets to form a magneto type magnetic pole... | 09/24/2002 |
| 6208055 | Electromagnetic transducer and electronic device including the transducer The invention provides an electromagnetic transducer which can improve conversion efficiency by reducing the weight of a rotor and thinning a rotor shaft to reduce both size and weight. An electromagnetic transducer includes a rotor comprising a plurality... | 03/27/2001 |
| 6181048 | Method for selectively coupling layers of a stator in a motor/generator An axial field motor/generator having a rotor that includes at least three annular discs magnetized to provide multiple sector-shaped poles. Each sector has a polarity opposite that of an adjacent sector, and each sector is polarized through the thickness... | 01/30/2001 |
| 6147415 | Permanent magnetic generator A permanent magnetic dynamo comprises a wind gatherable stand having a tapered outer wall surface that extends from the lower end toward the upper end of the wind gatherable stand in order to guide wind upward; a roof supported through support shafts fixe... | 11/14/2000 |
