Class 310/49A - Claw-tooth and printed circuit components

Subclass of Class 310 - Electrical generator or motor structure
No. of patents: 29
Last issue date: 12/04/2007

Number	Title	Issue Date
7304409	Driving device and light amount controller A low-cost, small-sized and high-output driving device which makes it possible to produce two outputs separately and is easy to handle. The driving device has two driving units comprised of a coil, a stator, a magnet, and a rotor. The two driving units are arranged,...	12/04/2007
7183676	Stepping motor A small-sized and low-cost stepping motor includes a stator made of a soft magnetic material integrally having first and second outer magnetic poles, a first coil wound around a first bobbin externally fitted to the first outer magnetic pole, a second coil wound aro...	02/27/2007
7173352	Stepping motor A stepping motor includes a magnet ring 1 whose outer peripheral surface is circumferentially divided to form radial protrusions and recesses and whose outer peripheral surface consists of a cylindrical permanent magnet magnetized to the same polarity, first ...	02/06/2007
7155804	Method of forming an electric motor A stator is provided for an electrical device (e.g., a motor) comprised of one or more stator segments formed by the compaction of one or more powdered metallic materials. Each stator section has at least one tooth that forms a substantially toroidal path for magnet...	01/02/2007
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
7053517	Stepping motor with dual-layer bobbin cover In a stepping motor comprising a pair of stator yokes and a bobbin that includes a cylindrical body and two flanges, each of the two flanges radially extending outward from the cylindrical body so that the bobbin forms a squared U-shape in the axial cross-section th...	05/30/2006
7015604	Stepping motor and method of manufacturing stepping motor A stepping motor includes: a rotary shaft; a rotor magnet mounted fixedly on the rotary shaft; a bearing member including a smaller-diameter portion and a larger-diameter portion, and supporting the rotary shaft; and a yoke including a plurality of magnetic pole tee...	03/21/2006
6979918	Actuator An actuator according to the present invention includes: a rotor that includes a magnet that has a cylindrical shape, and an outer peripheral surface alternately magnetized into different poles in a peripheral direction, and a soft magnetic member that is fixed to a...	12/27/2005
6891307	Motor with a plurality of pole teeth A motor includes a plurality of core assemblies forming three phases, and a plurality of coil windings provided on the respective core assemblies, wherein one of the coil windings is wound in a coil winding direction opposite to a coil winding direction of the coil ...	05/10/2005
6888271	High power density alternator bobbin A bobbin for a rotor is of a three-piece construction which allows for greater heat transfer, increased percentage fill, and hence increased power density of the alternator. Preferably, the three-piece assembly includes an injection molded plastic core, and opposing...	05/03/2005
6882066	Unipolar transverse flux machine In a unipolar transverse flux machine, in particular a motor, having a rotor, which is comprised of two coaxial, ferromagnetic, toothed rotor rings, and a permanent magnet ring, which is magnetized in an axially unipolar fashion and is clamped axially between these ...	04/19/2005
6809457	Brushless DC motor with a reduced thickness A brushless DC motor includes a pole plate, a magnetic pole base, a coil assembly, a circuit board, and a rotor. Each of the pole plate and the magnetic pole base is formed by punching a magnetically conductive plate and includes several pole faces and a magneticall...	10/26/2004
6710504	Brushless DC motor A brushless DC motor wherein a rotor has a motor shaft, a rotor yoke mounted on the motor shaft, and a ring-shaped magnet magnetized so as to have a plurality of magnet poles in the circumferential direction thereof, and held by the rotor yoke. A stator has first an...	03/23/2004
6707196	Motor with improved motor casing A motor includes a rotor equipped with a magnet magnetized in multiple poles, a stator yoke having claw poles with plural pole teeth disposed opposing to one another and arranged in a cylindrical shape extending in an axial direction and around an outer periphery of...	03/16/2004
6133666	Electric motor with a stator including a central locator An electric motor having a snap-together construction without the use of separate fasteners. The construction of the motor removes additive tolerances for a more accurate assembly. The motor is capable of programming and testing after final assembly and c...	10/17/2000
6118196	Electrical generator attached to a bicycle wheel A bicycle dynamo having enhanced power dynamics by having a large number of magnets 63 in alternate polarity lined up at a fixed interval along the inner circumference of the rotating mechanism 60. A circular lining 70 is outfitted and anchored around the...	09/12/2000
6034464	Vehicle alternator A vehicle alternator is constructed such that satisfies the relationship 0.3ࣘ{Br.multidot.(t1+t2).multidot.L}/(W.multidot.t1.multidot.cos.the ta.)ࣘ2.0 where Br represents the residual magnetic flux density of each of the magnets, L represents the length fro...	03/07/2000
6008554	Claw-pole stepper motor having a rotor supported by an axial bearing and a rotor-magnet extending beyond an end of a stator return element Stator elements each accommodate at least one stator coil (5, 6), and a rotor (2) comprises a permanent magnet (10) which is axially supported by means of at least one axial bearing (11), the rotor (2) having an inner screwthread (12) in which a threaded ...	12/28/1999
5786652	Magnetoelectric rotor with claws and non-magnetic spacers interposed therebetween The invention relates to a 2N pole claw rotor comprising a first magnetic material part, comprising an axial hub having a free end, and an end provided with N axially-extending claws that are peripherally localized, uniformly distributed, and together def...	07/28/1998
5703419	Stepper motor with shortened axial length A stepper motor comprises a rotor assembly, two bobbin assemblies and two stator assemblies. The stator assemblies are located to sandwich the rotor assembly radially therebetween. Each stator assembly includes upper and lower yokes, columnar cores and a ...	12/30/1997
5523634	Stepping motor A stepping motor having a shaft with a magnet fixed coaxially thereon, a pair of bobbins of soft magnetic material fixed along the shaft at opposite ends of the magnets, A-phase and B-phase coils wound around the bobbins, yokes having bottom plate portion...	06/04/1996
5283495	Rotary actuator for determining a flow cross section of a by-pass line around a valve A rotary actuator for setting the rotation angle of control elements, especially of a throttle device which determines the flow cross-section in a line through which flow passes, for internal-combustion engines, having an electric actuating motor with a t...	02/01/1994
5170082	Yoke of stepping motor and method for manufacturing the same In a method for manufacturing yokes (3, FIG. 1) to be used in a permanent magnet type stepping motor (10, FIG. 2), a surface-treated dead soft steel sheet such as nickel-plated steel sheet or aluminized steel sheet containing carbon in 0.01 wt. % or less ...	12/08/1992
4990806	Pulse motor In a pulse motor comprising a rotor, a drive coil excited by a predetermined drive current to drive the rotor, and a yoke for guiding a magnetic flux generated by the drive coil to a predetermined magnetic path; the yoke is provided with an aperture to re...	02/05/1991
4972109	Stepping motor A stepping motor comprising a rotor having magnetic poles on the peripheral surface thereof at a predetermined pitch, first and second stator yoke units each having pole teeth at the predetermined pitch and disposed with deviation of 1/4 pitch therebetwee...	11/20/1990
4841189	Stepper motor and method of making the same A multi-phase stepper motor having an annular permanent magnetic rotor and a plurality of matingly engageable stator phase assemblies around the rotor. Each of the phase assemblies comprises a pair of annular pole pieces including interleaved salient stat...	06/20/1989
4488069	Stepping motor In the disclosed motor, a stator and a rotor are movable relative to each other about a common axis. The stator has stator poles with radially directed stator teeth arranged in a circle around the axis and the rotor includes a first axial portion and a se...	12/11/1984
4223300	Electro mechanical position indicator using relatively moveable coils An electromechanical positioner indicator is provided which comprises first and second relatively movable parts, the first part including two oppositely facing surfaces which are everywhere equidistant and the second part including two surfaces which are ...	09/16/1980
4039936	Interleaved magnetoresistive displacement transducers Magnetoresistive displacement transducer arrangement for toothed magnetic members in which each transducer is formed by a pair of interconnected sections spaced from each other by the width of a tooth to provide greater change and improved symmetry in the...	08/02/1977

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Class 310/49A - Claw-tooth and printed circuit components