| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 310154210 | Permanent magnet characterized by the shape of the magnet | 18 |
| 20090102303 | Electric Motor - An electric motor ( | 04-23-2009 |
| 20100013337 | ELECTRIC MOTOR - An electric motor has a housing, a rotor rotatably installed in the housing, n permanent magnets with the same polarity fixed at an inner surface of the housing. The rotor is a wound armature having a plurality of teeth extending in a radial direction. The housing includes n inner projecting parts, the permanent magnets and the inner projecting parts being alternately arranged in a circumferential direction about the rotor. The magnets generate 2n magnetic circuits via the housing and the rotor, n being an integer greater than one. The size of at least a portion of a first air gap formed between the permanent magnets and the rotor is greater than the size of at least a portion of a second air gap formed between the inner projecting parts and the rotor. | 01-21-2010 |
| 20100072848 | Small DC motor - A small DC motor includes: a motor frame including a cylindrical portion, the cylindrical portion having a constant thickness and having a cross section in a shape that includes four sides and connecting portions, each of the connecting portions connecting adjacent two of the four sides and being located inward from a corresponding corner in a quadrangle including the four sides; field magnets; and an armature assembly, wherein the field magnets are provided so as to be spaced apart from each other, and the small DC motor includes an air gap between each of the four sides and a radially outermost surface of the armature assembly, the air gap being a minimum size needed to rotate the armature assembly. | 03-25-2010 |
| 20100156226 | BRUSH TYPE MOTOR - A brush type motor including a stator having at least one magnet with an inner circumferential surface is provided. The inner circumferential surface is defined by a first radius orthogonally extending from a first axially extending centerline. The motor has an armature disposed within an interior region of the stator having teeth. Each tooth has an arcuate surface defined by a second radius orthogonally extending from a second axially extending centerline. At least one tooth is radially closer to the inner circumferential surface than the teeth adjacent to the at least one tooth. Each tooth further includes at least one dummy notch extending into the tooth. The first axially extending centerline is in a first position different than a second position of the second axially extending centerline. | 06-24-2010 |
| 20100181857 | Small DC motor - A small DC motor includes a motor frame having a cylindrical portion, the cylindrical portion having a constant thickness and having a cross section in a shape that comprises four sides and connecting portions, each of the connecting portions connecting adjacent two of the four sides and being located inward from a corresponding corner in a quadrangle comprising the four sides; and a magnet having a circumferential surface on an inside thereof and having conformable contact with the motor frame on an outside thereof. | 07-22-2010 |
| 20100289363 | Electromagnetic Machine with Independent Removable Coils, Modular Parts and Self Sustained Passive Magnetic Be - A rotating electromagnetic machine has a tubular axle with mounting rings, a common ring, a coil input ring, and at least one bearing set mounted on it. A fitting is secured at a distal end of the tubular axle, and a commutator is secured at the proximal end. A housing is mounted on the bearing sets through adaptors. Connecting bars extend axially within the axle with lateral rods joined to the connecting bars at their distal ends, the bars commuting between segments of the commutator electromagnetic coils. A plurality of the electromagnetic coils are secured to the coil input ring. The coils are formed of spiral turns of a single flat strip electrically conductive material. A plurality of peripheral and sector magnets are mounted adjacent to the electromagnetic coils with electromagnetic interaction when relative motion occurs between the coils and the magnets. | 11-18-2010 |
| 20110018380 | DC MOTOR - A DC motor | 01-27-2011 |
| 20120286611 | MOTOR - A small DC motor includes a motor frame having a cylindrical portion, the cylindrical portion having a constant thickness and having a cross section in a shape that comprises four sides and connecting portions, each of the connecting portions connecting adjacent two of the four sides and being located inward from a corresponding corner in a quadrangle comprising the four sides; and a magnet having a circumferential surface on an inside thereof and having conformable contact with the motor frame on an outside thereof. | 11-15-2012 |
| 20150333575 | MOTOR - A small DC motor includes a motor frame having a cylindrical portion, the cylindrical portion having a constant thickness and having a cross section in a shape that comprises four sides and connecting portions, each of the connecting portions connecting adjacent two of the four sides and being located inward from a corresponding corner in a quadrangle comprising the four sides; and a magnet having a circumferential surface on an inside thereof and having conformable contact with the motor frame on an outside thereof. | 11-19-2015 |
| 310154220 | With specific dimension | 5 |
| 20090152971 | Small DC motor - A small DC motor includes a motor frame having a cylindrical portion, the cylindrical portion having a constant thickness and having a cross section in a shape that comprises four sides and connecting portions, each of the connecting portions connecting adjacent two of the four sides and being located inward from a corresponding corner in a quadrangle comprising the four sides; and a magnet having a circumferential surface on an inside thereof and having conformable contact with the motor frame on an outside thereof. | 06-18-2009 |
| 20100072849 | MOTOR - A motor comprises a stator and a rotor ( | 03-25-2010 |
| 20110266906 | SMALL DC MOTOR - A small DC motor includes a motor frame having a cylindrical portion, the cylindrical portion having a constant thickness and having a cross section in a shape that comprises four sides and connecting portions, each of the connecting portions connecting adjacent two of the four sides and being located inward from a corresponding corner in a quadrangle comprising the four sides; and a magnet having a circumferential surface on an inside thereof and having conformable contact with the motor frame on an outside thereof. | 11-03-2011 |
| 20110266907 | SMALL DC MOTOR - A small DC motor includes a motor frame having a cylindrical portion, the cylindrical portion having a constant thickness and having a cross section in a shape that comprises four sides and connecting portions, each of the connecting portions connecting adjacent two of the four sides and being located inward from a corresponding corner in a quadrangle comprising the four sides; and a magnet having a circumferential surface on an inside thereof and having conformable contact with the motor frame on an outside thereof. | 11-03-2011 |
| 20120068566 | DC MOTOR - A DC motor comprises: a tubular metal case; a magnet that is provided along the inner surface of the metal case and has four or more of magnet poles in the circumferential direction; an armature that is arranged to face the magnet and composed of a core and a coil; and a shaft. The magnet is formed of a material with a maximum energy product BHmax of 3 to 6 MGOe. When the thickness of the magnet in the radial direction of the armature is indicated by T [mm] and the outer diameter of the core is indicated by d [mm], the ratio T/d of the thickness T of the magnet to the outer diameter d of the core is 0.16 or more. | 03-22-2012 |
| 310154240 | Bar, square or rectangular | 1 |
| 20100176676 | SMALL MOTOR OF QUADRANGULAR EXTERNAL SHAPE - The side wall of a motor casing is formed into a quadrangular shape such that four flat side portions, and arcuate corner portions located at respective corners are continuously joined together. A field magnet having a quadrangular external shape is formed such that four flat side portions, and four arcuate corner portions located at respective corners are continuously joined together. The arcuate corner portions of the motor casing and the arcuate corner portions of the field magnet extend along respective circles having a center located at the center of a motor shaft, and the central angles of the arcuate corner portions fall within a range of 15° to 35° inclusive. The field magnet is press-fitted or bonded into the motor casing such that the corner portions of the field magnet come into close contact with the corner portions of the motor casing. | 07-15-2010 |
| 310154250 | Disk, ring, or cylinder | 3 |
| 20100102662 | ELECTRIC MOTOR - An electric motor has a rotor ( | 04-29-2010 |
| 20100109464 | ELECTRIC MOTOR - A motor comprises a stator and a rotor ( | 05-06-2010 |
| 20110121675 | METHOD OF RARE EARTH-IRON BASED ANNULAR MAGNET AND MOTOR FABRICATED THEREBY - Improvement of torque densities, miniaturization and weight saving for outer rotor type motors or permanent-magnet-field-type DC motors can be efficiently achieved by high-energy densification of a magnet. However, torque pulsation or armature reaction gives negative influences thereto. Further, in application of a slotless (coreless) structure eliminating the torque pulsation or the armature reaction, the magnetic resistance of motor magnetic circuits will be enhanced. For solving the above problems, there is provided an annular magnet that is opened in a reverse direction relative to the opening direction of a U-shaped segment fabricated in constantly-directed magnetic fields, the annular magnet having an anisotropic distribution where angles relative to inner peripheral tangent lines can be continuously changed in the range of approximately 0 to 90 degrees, and having energy density (BH) | 05-26-2011 |
