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| Number | Title | Issue Date |
| 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 |
| 7368838 | High efficiency voice coil motor Methods and apparatus for increasing the efficiency of a voice coil motor (VCM) are disclosed. According to one aspect of the present invention, a cylindrical and radially symmetric VCM includes a plurality of sets of magnets, and a single coil. The plurality of set... | 05/06/2008 |
| 7235909 | Electromagnetic motor/generator In some embodiments, an electromagnetic motor/generator may include one or more of the following features: (a) a frame, (b) a magnetic section having an upper magnet, a lower magnet, and a center magnet, coupled to the frame, and (c) at least one solenoid coupled to... | 06/26/2007 |
| 7211917 | Motor with a magnet fixed on the inner peripheral face of a circumferential wall A motor includes a circumferential wall part of a case provided with an opening part on one end side in an axial direction and at least a magnet fixed to the inner peripheral face of the circumferential wall part. At least a part of the outer peripheral face of the ... | 05/01/2007 |
| 7159295 | Method of making a miniature electric motor A miniature PMDC motor 10 has a permanent magnet stator comprising two arcuate ceramic magnets 20 fitted to a can-like housing 11 and circumferentially separated by interdisposed rubber magnets 21 wedging or nipping the ceramic magnets | 01/09/2007 |
| 7071591 | Electromagnetic circuit and servo mechanism for articulated cameras An electromagnetic circuit that may be advantageously employed in an articulated camera, such as a CCTV camera, as a part of a servo mechanism to directly drive the camera and optical lens assembly, for example, in the pan and/or tilt axes. In one embodiment, the co... | 07/04/2006 |
| 7038565 | Rotating dipole permanent magnet assembly A permanent magnet assembly is disclosed that utilizes at least two rotating magnet subassemblies, and first and second stationary magnet subassemblies arranged so that their magnetic vectors oppose each other. At a first rotational position of the rotating magnet s... | 05/02/2006 |
| 6995488 | Permanent magnet field small DC motor A permanent magnet field small DC motor includes an arc-shaped rare earth magnet of maximum thickness 1 mm or less fabricated by compression molding from rare earth iron based melt-spun flakes and a binder. The magnet is provided with a certain specific portion at b... | 02/07/2006 |
| 6975057 | Rotary electric machine having a stator made up of sectors assembled together The invention relates to a rotary electric machine including a stator, powered by a polyphase current, having a magnetic circuit with teeth forming intervening slots for receiving electrical conductors. The magnetic circuit is made up of an assembly of sectors defin... | 12/13/2005 |
| 6873235 | Shear force levitator and levitated ring energy storage device One or more permanent magnets, or one or more permanent magnet arrays are used to produce shear force levitation. A primary application of shear force levitators is a levitated ring energy storage device. Such a levitated ring energy storage device includes a round ... | 03/29/2005 |
| 6376956 | Permanent magnet pole arrangement of motor A pole arrangement of a motor includes a plurality of permanent-magnet main poles disposed annularly at equal intervals on the inner periphery of a yoke, a plurality of auxiliary poles disposed between adjacent two of the main poles, and a plurality of ma... | 04/23/2002 |
| 6376957 | Alternating current machine A generator or a 3-phase motor is arranged to provide multipolar permanent magnet excitation in combination with multipolar reluctance distribution wherein different numbers of poles are used for the permanent magnet excitation and for the reluctance dist... | 04/23/2002 |
| 5949169 | Electric rotating machine having radially outwardly extending bulge on yoke A plurality of magnetic poles each made of a permanent magnet is circumferentially arranged at regular intervals on the inner circumferential surface of a yoke. Bulged portions are axially formed on a wall portion of the yoke between the adjacent two magn... | 09/07/1999 |
| 5723929 | D.C. Motor with primary and auxiliary magnetic poles A direct current motor for vehicle engine starters includes a plurality of primary and auxiliary magnetic poles made of permanent magnets arranged between a cylindrical yoke and a cylindrical sleeve inside which an armature is rotatably supported. In orde... | 03/03/1998 |
| 5349258 | Permanent magnet structure for use in electric machinery Magnetic circuit losses due to unnecessary magnetic fields are greatly curtailed or eliminated relative to the permanent magnet structures of electric machinery, without employing a conventional shunt or pole pieces. At least one coaxial cylinder of magne... | 09/20/1994 |
| 5109172 | Permanent magnet motor having diverting magnets A dc electric motor having a rotor, a stator, and at least a pair of oppositely disposed main magnets associated with one of the rotor and stator is provided. Preferably, the main magnets are associated with the stator in a stator assembly. The stator ass... | 04/28/1992 |
| 5008578 | Permanent magnet motor having diverting magnets A dc electric motor having a rotor and a stator and at least a pair of oppositely disposed main magnets associated with one of the rotor and stator and including an end diverting magnet positioned at each end of each main magnet. The diverting magnets hav... | 04/16/1991 |
| 4980593 | Direct current dynamoelectric machines utilizing high-strength permanent magnets A direct current dynamoelectric machine is disclosed including plural main poles on a field frame with a wound armature rotatably mounted therein. The main poles utilize high-strength permanent magnets which are thick enough to supply a magnetic field, bu... | 12/25/1990 |
| 4570093 | Direct-current motor with two drive magnets A direct-current motor includes a rotatable shaft, a core mounted on the rotatable shaft and supporting windings disposed around the core, the core having winding-free portions, a first drive magnet disposed in radially confronting relation to the winding... | 02/11/1986 |
| 4481437 | Variable flux permanent magnets electromagnetic machine The rotor or stator of an electro-magnetic machine, such as an electric motor, having permanent magnets is provided with auxiliary permanent magnets which are relatively positionable to provide an external magnetic flux path during normal operation of the... | 11/06/1984 |
| 4376903 | Direct current dynamo electric machine A direct current dynamo electric machine comprising a non-magnetic cylindrical rotor wherein a small-diameter sleeve-like insulating cylinder is secured to a rotor shaft, a winding is disposed around the outer periphery of said insulating cylinder and mos... | 03/15/1983 |
| 4322646 | Flux focussed DC motor and method for assembly A DC motor utilizing flux focussing pole pieces and non-ferrous spacers to wedge the pole pieces and magnets into contact with the motor housing. Cooling is provided with heat pipes mounted in the spacers or pole pieces and/or the motor armature.... | 03/30/1982 |
| 4243903 | Permanent magnet stator for a DC dynamo electric machine using blocking magnets A permanently magnetic stator for a DC dynamo electric machine which is adapted to define an extremely large air gap between pole pieces disposed face to face with a non-magnetic or substantially non-magnetic columnar solid body rotor. Two main permanent ... | 01/06/1981 |
| 4217513 | Direct current motor Disclosed is a direct current motor which comprises an armature, provided with armature windings thereon, and a plurality of field magnet devices, each of the field magnet devices being divided into three parts along the rotational direction of the armatu... | 08/12/1980 |
| 4114057 | Dynamoelectric machine with inner and outer stators A dynamoelectric machine having coaxial inner and outer stators and, preferably, also end stators, each stator being provided with a plurality of magnetic flux producing magnets, preferably of the permanent magnet type. The rotor has a hollow cylindrical ... | 09/12/1978 |
