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"What, sir, would you make a ship sail against the wind and currents by lighting a bonfire under her deck? I pray you, excuse me, I have not the time to listen to such nonsense."
Napoleon Bonaparte ; When told of the Robert Fulton steamboat
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| Number | Title | Issue Date |
| 7420308 | PMBDCM and two phase SRM motor, two phase SRM rotor and stator, and coil wrap for PMBDCM and SRM motors A two-phase switched reluctance motor in an embodiment includes a plurality of salient rotor poles that each have asymmetric reluctances about a central radial axis of the respective rotor pole. Each of the rotor poles has the same width, and the rotor poles are ope... | 09/02/2008 |
| 7372181 | Rotor for brushless motor and brushless motor A rotor for a brushless motor which can securely prevent an idle running and a scattering of a magnet while restricting a manufacturing cost as low as possible. The rotor is provided with a sintered ring magnet in which not-ground recess portions are formed in an ax... | 05/13/2008 |
| 7288923 | Voltage-limited electric machine An electric alternator having a rotor, stator and at least one winding in the stator adapted to conduct a current, the machine also having and first and second magnetic circuits around different portions of the winding which may be configured relative to one another... | 10/30/2007 |
| 7288868 | Motor generator A motor generator is provided with a stator having a winding around each of a plurality of stator teeth, and a rotor having a plurality of permanent magnets by the number larger than that of the stator teeth, arranged in the circumferential direction at equal interv... | 10/30/2007 |
| 7262539 | Saturation control of electric machine The invention includes an electric alternator/motor having a rotor, stator and at least one winding in the stator adapted to conduct a current, the machine also having and first and second magnetic circuits, one of which includes a saturable portion in which saturat... | 08/28/2007 |
| 7248008 | Shaded-pole A.C. motor with dynamic brake Am improved shaded pole A.C. motor with dynamic brake that includes a secondary high resistance winding that is selectively connected to a D.C. source when the A.C. voltage is removed. To stop a motor the A.C. voltage applied to the motor is removed with tandem swit... | 07/24/2007 |
| 7235911 | Stepping motor A stepping motor includes: a magnet; a coil arranged concentrically with the magnet and to be opposed to a magnet, a predetermined clearance being provided between the magnet and the coil; and a magnetic member that surrounds the coil and includes a magnetic pole in... | 06/26/2007 |
| 7196448 | Stator structure A stator structure. A first stator part includes a first engaging portion. A second stator part includes a second engaging portion corresponding to the first engaging portion. The first and second stator parts are of the same material. When the first stator part is ... | 03/27/2007 |
| 7164220 | Stator pole structure for an electrical machine An electrical machine, such as a transverse flux motor, incorporates a stator core assembly 1. The stator core assembly 1 comprises a stator frame 4 upon which stator cores 2,3 are located with spacer elements 7 therebetween. A num... | 01/16/2007 |
| 7126246 | Rotary electric machine with stator having an annular array of poles Coils in respective poles are all wound in the same shape. The coils are wound such that one of the winding ends in a predetermined layers, for a single turn, is passes to an adjacent layer, or single turns at the winding ends in a predetermined layer are wound to d... | 10/24/2006 |
| 7071584 | Linear motor A linear motor includes tubular outer yoke (4), tubular inner yoke (3) disposed in outer yoke (4), coil (2) provided to inner yoke (3), permanent magnet (5a, 5b) vibrating following a magnetic flux produ... | 07/04/2006 |
| 6960861 | Combined stator core for an electric rotary machine A yoke includes a plurality of recessed portions. A teeth block includes a plurality of protruding portions being coupled or fitted into the recessed portions of the yoke. The recessed portions and the protruding portions are disposed as a plurality of pairs in the ... | 11/01/2005 |
| 6909209 | Low-profile stepping motor having coils wound rectangularly A stepping motor comprises a rotor assembly and a stator assembly. The stator assembly includes first and second stator units arranged horizontally on a same plane. Each stator unit is composed of: upper and lower stator yokes, which are shaped substantially semi-an... | 06/21/2005 |
| 6864612 | Iron core for electric motor and electric generator An iron core for an electric motor or an electric generator includes a core section, and at least two magnetic pole pieces formed at the core section. Each magnetic pole piece has at least two slits with difference depths extending from a surface thereof to be asymm... | 03/08/2005 |
| 6859993 | Method of making single phase permanent split capacitor motor A permanent split capacitor electric motor is constructed by using existing components of a known shaded pole motor design to reduce engineering, tooling, inventory and other manufacturing costs of the new motor and, potentially, the known design through economics o... | 03/01/2005 |
| 6777844 | Brushless motor A vacuum cleaner assembly includes a motor having a rotor and a stator for providing motive power to the assembly. The rotor and stator each include armatures having tips. In one aspect, the widths of the rotor and stator tips are different. In another aspect, the r... | 08/17/2004 |
| 6097129 | Electronically commutated motor An electronically commutated external rotor motor has an external rotor having a cup-shaped housing and a radially magnetized permanent magnet connected in the cup-shaped housing. An interior stator is positioned in the cup-shaped housing. The interior st... | 08/01/2000 |
| 6087751 | Reluctance type rotating machine with permanent magnets A reluctance type rotating machine includes a stator having armature windings arranged on an inner periphery of the stator, a rotor having projection portion forming magnetic poles, and a plurality of permanent magnets arranged on both side faces of the p... | 07/11/2000 |
| 6023118 | Stator of single-phase electric motor with four poles having parallel axes A stator of an electric motor with four poles which are all parallel to each other and arranged in mutually opposite pairs around the rotor cavity. Each pole has a pole shoe which is inclined toward the inside of the stator so as to form, in practice, the... | 02/08/2000 |
| 5825106 | Bi-directional biphase electromechanic transducer having multipolor magnets An electromecanic transducer comprises a stator 4 formed of three parts 6, 8 and 18 each presenting merlons or teeth 52, 54 and 60 superposed to a multipolar magnet 34 of rotor 30. Three statoric magnetic poles 10, 12 and 20 are situated in a same statori... | 10/20/1998 |
| 5780951 | Low-cost bobbin-wound stator construction for small, single-phase AC motors A bobbin-wound stator for small single-phase AC motors that surmounts magnetic compromises required by previous implementations is fabricated of stacked two-piece laminations and a split winding bobbin fitted about a first one of the lamination piece stac... | 07/14/1998 |
| 5729071 | Low cost multi-pole motor constructions and methods of manufacture Low cost multi-pole motor constructions and related methods of manufacture are disclosed. The economic advantages inherent in the construction and manufacture of C-frame motors, including modified and improved C-frame or twin bobbin motor constructions, h... | 03/17/1998 |
| 5638041 | Electromagnetic assembly An electromagnetic assembly, for example for a relay, has a magnetic core surrounded by an electrical coil, and an armature closing the magnetic circuit of the electromagnetic assembly. The magnetic core is of the split pole type having a first pole and a... | 06/10/1997 |
| 5627424 | Twin bobbin four pole motors and methods for making same A double twin bobbin four pole motor is disclosed. The motor includes a first and second stack of magnetically conductive stacked laminations. The first stack includes a four pole central portion with a rotor opening and two pairs of spaced side legs, eac... | 05/06/1997 |
| 5619086 | Twin bobbin C-frame motors and methods for making same A C-frame motor having cooperating first and second stack of laminations is disclosed. The first stack of laminations includes an end leg with a spaced pair of side legs which are attached at one end to the end leg and terminate in an opposite end in an o... | 04/08/1997 |
| 5168201 | Shifting-field type permanent-magnet motor A shifting-field type permanent-magnet motor includes a stator having a stator core, a shading coil and a multiple-layer coil assembly; a control unit for starting the motor and a control unit for free-running the motor for sequentially changing over the ... | 12/01/1992 |
| 5130591 | Shaded pole motor A shaded pole motor includes a squirrel-cage rotor and a stator assembly. The stator assembly having a bore for rotatably receiving the rotor and pole separation parts on an inner circumference of the bore so that adjacent separated portions are excited a... | 07/14/1992 |
| 5043612 | Epoxy coated motor with shading band having tapered edges A shading band for use in creating a shading pole in a shaded pole motor has tapered edges along its length, instead of the square cross-sectional edges with 90° inside angles of the prior art, in order to increase the thickness of epoxy deposited thereo... | 08/27/1991 |
| 5036237 | Shaded pole motor A shaded pole electric motor has a stator and a rotor interacting through an air gap. This stator has a salient pole with a narrow neck and wide pole shoe. A shading coil slot extends into the salient pole from the air gap and defines a shaded portion of ... | 07/30/1991 |
| 4942323 | Two pole electric motor with stator winding encircling the rotor A two pole electric motor is described which includes at least one stator encircling winding which at least partially overlaps the rotor air gap to insure that substantially the entire magnetic field created by such rotor encircling winding is forced to p... | 07/17/1990 |
| 4893041 | Stator end cap insulator assembly including an improved stator liner, stator liner retainer and shading element insulator An improved stator end wire insulation assembly for a stator core wherein molded end cap insulator structure for such stator core includes means to restrain stator core opening free-ended insulation liners from both axial and radial movement, the end cap ... | 01/09/1990 |
| 4886990 | Reversing PSC motor design capable of high reversal reptition rate A reversible permanent split capacitor (PSC) motor and method of designing such a motor employs a parallelogram lamination silhouette and distributes the winding in the core of the motor stator assembly so that maximum flux density in the core is approxim... | 12/12/1989 |
| 4585984 | Alternating current motor An alternating current motor comprising a combination of magnetic frequency tripler and induction rotor. The alternating current motor includes a three-legged core of which two legs serve as input leg having a coil wound thereabout and thereby constitute ... | 04/29/1986 |
| 4531072 | Shaded pole synchronous motor An improvement in the stator structure of a synchronous motor wherein flux generated by a winding produces a magnetic field in the stator structure which in turn causes a rotor to rotate. The stator structure consists of two sets of stator poles intermesh... | 07/23/1985 |
| 4496869 | Small shaded-pole motor A small shaded-pole motor comprises a rotor, stator core disposed in concentric relationship with the rotor, stator coils wound on the stator core and shading coils disposed in the vicinity of the stator core. The stator core consists of two generally rec... | 01/29/1985 |
| 4482832 | Shaded pole motor lamination A shaded pole lamination is disclosed which includes a rotor opening positioned asymmetrically with respect to the sides of the lamination so as to increase the metal available to carry the magnetic flux on the side of the main pole which is farther from ... | 11/13/1984 |
| 4418296 | Magneto-generator for engine ignition systems A magneto-generator for engine ignition has a cup-shaped pole-wheel with a multiplicity of magnet poles (13) within which is a stationary star-shaped armature having generator windings (20) on the outwardly extending pole legs. A pulse generator (24) is b... | 11/29/1983 |
| 4394595 | Stator arrangement for a synchronous motor A synchronous motor wherein a field coil is positioned adjacent to a rotor and stator assembly in a side-by-side relationship has a stator pole arrangement to compensate for flux phase differences caused by the side-by-side arrangement.... | 07/19/1983 |
| 4355252 | Synchronous motor In a self-starting unidirectional synchronous motor which includes a stator, an exciting coil at least partly disposed within the stator, a permanent magnet type rotor which has a plurality of rotor poles and is at least partly disposed within the coil, a... | 10/19/1982 |
| 4274024 | Self-starting synchronous motor with defined direction of rotation Herein disclosed is a self-starting synchronous motor with a defined direction of rotation, a permanent magnetic rotor and a claw-pole type stator. The stator embraces an operating winding where several poles are combined to form main pole groups and to f... | 06/16/1981 |
