Did You Know...
...that the Band-Aid Bandage was invented by a Johnson & Johnson employee whose wife had cut herself? Earl Dickson's wife was rather accident prone, so he set out to develop a bandage that she could apply without help. He placed a small piece of gauze in the center of a small piece of surgical tape, and what we know today as the Band Aid bandage was born!
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| Number | Title | Issue Date |
| 8183730 | 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... | 05/22/2012 |
| 8110956 | 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... | 02/07/2012 |
| 8013489 | 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... | 09/06/2011 |
| 7994674 | Flux-focused shaped permanent magnet, magnetic unit having the magnets, device having the magnetic units and method for asymmetrically focusing flux fields of permanent magnets A flux-focused, shaped permanent magnet includes a body of magnetic material having multiple surface contouring to form a reduced flux side with convex surfaces and an increased flux side with concave surfaces. The surfaces develop high and low resistance external f... | 08/09/2011 |
| 7732963 | Small-sized motor having ring-shaped field magnet A small-sized motor includes a field magnet attached to an inner circumferential surface of a metallic motor casing and having four or more magnetic poles. The field magnet is formed of a single ring-shaped magnet member having a predetermined thickness with respect... | 06/08/2010 |
| 7528515 | 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... | 05/05/2009 |
| 7427817 | Small-sized motor having polygonal outer shape A small-sized motor having a polygonal outer shape includes four or more field magnets attached to the inner surface of a motor casing made of metal. A tubular portion of the motor casing is formed into a polygonal tubular shape such that flat side portions equal in... | 09/23/2008 |
| 7248440 | Single lever type actuator latch system of disk drive An actuator latch system of a disk drive to lock an actuator having a swing arm installed at a base member, a voice coil motor coil joined to an end portion of the swing arm, and a magnet facing the voice coil motor coil, including a first and a second latch portion... | 07/24/2007 |
| 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 |
| 7233090 | Electric machine, in particular brushless synchronous motor An electrical machine, in particular a brushless synchronous motor has a stator (14) and a rotor (12) with salient poles (18) disposed distributed over its circumference, each of which poles has an enclosed permanent magnet (11) and a pol... | 06/19/2007 |
| 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 |
| 7062775 | Actuator for an optical pickup A magnet used for an actuator of an optical pickup has a magnetization pattern with two different pole areas adjacent each other. At a corner part defined by the boundary line of the two pole areas, the pole area inside the corner part has a projection area, project... | 06/13/2006 |
| 7034422 | Radial-axial electromagnetic flux electric motor, coaxial electromagnetic flux electric motor, and rotor for same A rotor for an electrical motor may include a plurality of salient radial field rotor poles and a plurality of salient axial field rotor poles. The radial field rotor poles and the axial field rotor poles are respectively oriented on the rotor to receive or convey s... | 04/25/2006 |
| 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 |
| 6987340 | DC motor with brushes A DC motor includes a stator of magnets surrounding a rotor containing coils of wire surrounding cores. Brushes serve to repeatedly start and interrupt the supply of current to the individual coils via respective commutator segments of the rotor in order to rotate t... | 01/17/2006 |
| 6952068 | Fabricated components of transverse flux electric motors Transverse flux electric motors are made using a unique process where individual components are premade and then assembled together. A stator portion is made by nesting a coil between two stator core portions. The stator core portions are made from laminations or si... | 10/04/2005 |
| 6927518 | Direct current machine having continuously arranged magnetic poles When one of armature coils is in a beginning of a commutation process, a center line of a trailing end tooth of a corresponding group of teeth, around which the one of the armature coils is wound, is generally aligned with a corresponding boundary between magnets. W... | 08/09/2005 |
| 6921999 | Electric motor An electromagnetic rotary actuator is driven by a single-phase voltage. Permanent magnets on a rotor interact over a part-cylindrical small airgap with a soft-iron stator having pole teeth that carry at least one winding for rotating the rotor within a limited angul... | 07/26/2005 |
| 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 |
| 6812608 | Direct current motor having field magnets formed by injection molding synthetic resin, with which magnetic particles are mixed, to the inner periphery of the stator core Field magnets are attached to an inner periphery of a stator core, which defines a rotor through hole. The stator core has a plurality of recesses open to the rotor through hole. Each recess faces magnet end portions of the field magnets. The recess surface of the r... | 11/02/2004 |
| 6806607 | 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 | 10/19/2004 |
| 6803690 | Electric motor excited by permanent magnets The electric motor with permanent-magnet excitation has a stator (1), a rotor (7) supported inside the stator and adjacent permanent magnets (8, 9, 10, 11) of opposite polarity arranged next to each other on a rotor surface facing the stator. Th... | 10/12/2004 |
| 6769168 | Flux ring for an electric motor A flux ring for a motor of a power tool has an annular housing which fits inside the motor can of the motor. At least one magnet is on the ring. The at least one magnet includes a portion formed from an isotropic magnetic material and a portion formed from an anisot... | 08/03/2004 |
| 6710493 | Dynamo-electric machine having tapered magnets secured to yoke A rotor and each magnet are configured to satisfy one of the following conditions: (Dπ/Z)Xn+T | 03/23/2004 |
| 6708388 | Method of making a permanent magnet field-type compact DC motor A permanent magnet field-type compact DC motor having a high output and a low cogging torque is made by fixing a pair of rare earth magnets mainly composed of rare earth-iron-based rapidly quenched and solidified flakes to a soft magnetic frame so as to extend along... | 03/23/2004 |
| 6707209 | Reduced cogging torque permanent magnet electric machine with rotor having offset sections A permanent magnet electric machine with reduced cogging torque includes a plurality of axial rotor sections that are defined on a radially outer surface of a rotor. The axial rotor sections include a set of permanent magnets that are in an unmagnetized state and th... | 03/16/2004 |
| 6462448 | Flux ring for an electric motor A flux ring for a motor of a power tool has an annular housing which fits inside the motor can of the motor. At least one magnet is on the ring. The at least one magnet includes a portion formed from an isotropic magnetic material and a portion formed fro... | 10/08/2002 |
| 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 |
| 6373161 | Periodic air gap electric generator A rotating machine that can generate standard AC, high-frequency AC, or DC electricity by non-conventional means. The method involves changing the air gap between a pole of a stationary magnet and a ferromagnetic member on a rotating disk-like flywheel. E... | 04/16/2002 |
| 5925963 | Magnetic circuit structure for a DC electrical machine having high resistance to cross magnetic flux A low armature reacting magnetic circuit includes of an integral combination of magnetic circuit structures, one for each magnetic pole including at least the two main magnetic field poles of the machine, to achieve magnetic flux circuits of two or more p... | 07/20/1999 |
| 5659215 | Small form factor actuator for improved functionality and linearity A voice coil motor (VCM) for a small form factor hard disk drive having a contoured flux field in the air gap wherein adjoining regions of oppositely directed magnetic flux form a transition zone. In the preferred embodiment, the magnetic structure assemb... | 08/19/1997 |
| 5497039 | Vibration reduction system for an electric motor A structured product family of dynamoelectric machines for use in a plurality of applications has a frame with a closed end, and a set of permanent magnets is adhesively secured within the frame. An armature disposed in the frame for interaction with the ... | 03/05/1996 |
| 5459362 | Small form factor actuator for improved functionality and linearity A voice coil motor (VCM) for a small form factor hard disk drive having a contoured flux field in the air gap wherein adjoining regions of oppositely directed magnetic flux form a transition zone. In the preferred embodiment, the magnetic structure assemb... | 10/17/1995 |
| 5434462 | High-power electrical machinery An electrical machine having a stator formed from a pair of cup-shaped permanent magnets symmetrically disposed on opposite sides of a conductive, disk-shaped rotor. The magnets are polarized such that a portion of their external magnetic flux passes in o... | 07/18/1995 |
| 5426338 | High-power electrical machinery with toroidal permanent magnets A pair of hollow permanent magnets mounted to form a toroidal stator having cylindrical gaps and opposed cavities. The magnets are polarized such that their magnetic flux passes in one direction through the gaps to intersect the rotor along two cylindrica... | 06/20/1995 |
| 5329267 | Magnet assembly and a voice coil motor using such magnet assembly Magnet assemblies for installation into a voice coil motor is described. A pair of magnetic pieces are molded into circular arc shapes of different radii and positioned concentrically across a gap. The ends of such the pair of magnet pieces, are joined to... | 07/12/1994 |
| 5317228 | High-power electrical machinery with toroidal permanent magnets A pair of hollow permanent magnets mounted to form a toroidal stator having cylindrical gaps and opposed cavities. The magnets are polarized such that their magnetic flux passes in one direction through the gaps to intersect the rotor along two cylindrica... | 05/31/1994 |
| 5315191 | Miniature motor A miniature motor having a housing formed into a bottomed hollow cylindrical shape. The inner circumferential surface to which a pair of permanent magnets, which are rare-earth plastic magnets of an essentially C shape in cross section, are fixedly fitted... | 05/24/1994 |
| 5309055 | High-power electrical machinery An electrical machine having a stator formed from a pair of cup-shaped permanent magnets symmetrically disposed on opposite sides of a conductive, disk-shaped rotor. The magnets are polarized such that a portion of their external magnetic flux passes in o... | 05/03/1994 |
| 5296767 | Efficient magnetic motor armatures A permanent magnet motor or actuator, such as the voice coil motors used in disk drives to position read/write heads, with an armature to magnet interface or junction modified to expand the magnetic material into regions of the armature that carry less th... | 03/22/1994 |
