Class 310/154.25 - Disk, ring, or cylinder

Subclass of Class 310 - Electrical generator or motor structure
Definition: Subject matter wherein the shape of at least one permanent
No. of patents: 24
Last issue date: 04/15/2008

Number	Title	Issue Date
7358636	Electric motor having resilient member and apparatus for manufacturing the same An electric motor includes a housing that receives multiple magnets that are circumferentially arranged in the housing. A resilient member has two inserted portions that are respectively inserted into gaps formed among the magnets. For example, four inserted portion...	04/15/2008
7213579	Fuel pump and method of manufacturing an armature for the fuel pump An axial length of the fuel pump is reduced, and the fuel pump is miniaturized, without reducing pumping performance. A space G is formed between coils 19 and the shaft 7 at the upper side of the core 11, and the lower portion of the comm...	05/08/2007
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
6917132	DC brush motor and permanent magnet used therein The challenge to be solved by the present invention is the miniaturization of a 1-300 W class of motor. This can be achieved by using a hollow-cylinder shaped anisotropic bonded magnet magnetized in a 4-pole configuration. The anisotropic bonded magnet has a maximum...	07/12/2005
6891296	Magnetizing structure of motor The present invention provides a structure for magnetizing a rotor magnet of a motor, which includes a rotor having a magnet cylinder with a wavy curve surface and a stator having a plurality of silicon steel sheets wound by a plurality of winding coils. The present...	05/10/2005
6867523	Brush motor A brush motor has a magnetic sensor provided for detecting a change in a field magnet occurring in correspondence with a change in a rotational position of a rotor core. ...	03/15/2005
6812615	Electric motor An electric machine including a direct current or an alternating current electric motor or generator and having a stator. The stator has an outer circumferential ring of equally spaced magnets. Spaced inwardly radially from the magnets is an inner circumferential ri...	11/02/2004
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
4876472	Five-phase dc motor with non-overlapping armature windings A 5-phase dc motor which can be mass-produced readily at a reduced cost. The motor comprises a field magnet having four alternate north and south magnetic poles of an equal angular width, a rotor including a rotor armature core having five rotor pole shoe...	10/24/1989
4857789	Rotary-type electromagnetic actuator for toys A rotary-type electromagnetic actuator for a toy includes a cylindrical magnetic stator fixedly mounted within a housing, a rotor arranged concentrically within the stator and rotatably supported by a shaft within the housing, a coil wound on the rotor fo...	08/15/1989
4847526	Variant-pole electric motor A compact, high-torque electric motor in which one motor element (either the stator or rotor) has magnetic poles whose effective magnetic width is substantially equal and which span equal center angles. The second motor element has a plurality of armature...	07/11/1989
4793054	Alignment system for permanent magnet motors A permanent magnet motor for use in such electrically-powered devices as appliances, power tools, and the like includes a longitudinally-split cylindrical ferromagnetic wrapper having an inner diameter normally less in its free state than the outer cross-...	12/27/1988
4644200	Rotational actuator for vehicle suspension damper A rotational actuator for the interior of an adjustable vehicle suspension damper device comprises a cylindrical permanent magnet stator and a cylindrical armature. The armature includes a shaftless winding on a non-magnetic armature frame, the armature f...	02/17/1987
4532449	DC motor A DC cored motor in which the rotor core has an odd number of slots to accept a corresponding number of coils which are connected to a commutator with a doubled number of segments, characterized by a combination of 2n+1 slots with 2n magnetic poles in the...	07/30/1985
4524293	4-Pole electric motor A 4-pole armature is accommodated with in a 4-pole permanent-magnet ring, either the ring or armature serving as the rotor. The core of the armature is cross-shaped, a set of two members of the core in straight orientation has windings applied on each mem...	06/18/1985
4501983	Electric machine The motor housing comprises a cup-shaped ferromagnetic part having an open end and an axial end plate of ferromagnetic material closing off the open end to form a motor housing of rectangular cross-section when viewed in longitudinal section. A generally ...	02/26/1985
4443724	Shaft transducer having DC output proportional to angular velocity A brushless DC tachometer is disclosed that includes a high strength toroidal permanent magnet (25) for providing a uniform magnetic field in an air gap, an annular pole piece (21) opposite the magnet, and a pickup coil (19) wound around the pole piece (2...	04/17/1984
4181866	Permanent magnet with reduced thickness at the pole areas for small size d-c motors A cylindrical field magnet for use in small size d-c motors having a coreless armature. The magnet includes magnetic pole portions varying in wall thickness from the interpolar portions and possesses an increased quantity of magnetic flux in its entirety ...	01/01/1980
4112320	Anisotropic magnet structure, particularly segmental magnet structure for permanent magnet dynamo electric machines An elongated ferrite structure of barium or strontium ferrite is constructed of zones in which the ferrite materials are made to have different magnetic properties, the ferrite material located in the region of the highest demagnetizing stress placed ther...	09/05/1978
4080540	Low-powdered stepping motor A low-powered stepping motor is rotated and controlled by a driving circuit generating a pulsating current has a fixed field system formed by a permanent magnet, a soft magnetic material, etc. and a rotor disposed within the fixed field system, and formin...	03/21/1978
4074159	Dynamo-electric machine An improved dynamo-electric machine such as an electric motor is disclosed including a novel commutator configuration and novel means for aligning a first machine housing relative to a second machine housing. The commutator includes an insulating member h...	02/14/1978
4004167	Permanent magnet stators Annular magnets, primarily for motor stators, are centrifugally cast from particulate materials and synthetic plastic materials. Iron particles and ferrite particles stratified during the spin casting procedures so that the former provide an outer stratum...	01/18/1977
3979616	Unipolar rotary step motor A unipolar rotary step motor having a polarized rotor which turns step-by-step in response to the magnetic field of a control coil as the coil is periodically pulsed by spaced unidirectional current pulses. The magnetic circuit includes, in addition to a ...	09/07/1976
3946260	Motor construction A compact AC-DC motor comprising a housing having a center section and respective end bells, each having a recess therein. A stator is received in the housing and extends into the recess in one end bell and a magnetic pole piece is similarly received in t...	03/23/1976

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Class 310/154.25 - Disk, ring, or cylinder