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| Number | Title | Issue Date |
| 7843093 | Driving device A stepping motor as a driving device has a stator with a plate part, and first and second outer magnetic pole parts axially extending from the plate part. A rotor formed by a rotary shaft and a core, each formed of a soft magnetic material, are disposed between the ... | 11/30/2010 |
| 7701094 | Motor with terminal block integrally mounted on terminal block mounting part and manufacturing method therefor A motor may include a rotor having a rotor shaft and a magnet, at least a stator core disposed around the rotor and provided with a plurality of pole teeth, and at least a coil mounted on the stator core. The stator core includes a terminal block mounting part which... | 04/20/2010 |
| 7679231 | Driving device and light amount controller A driving device which makes it possible to reduce the moment of inertia of a rotor and increase torque. A magnet is formed to have a hollow cylindrical shape and has magnetized sections which are magnetized to have alternately different poles in a circumferential d... | 03/16/2010 |
| 7638907 | Step motor for a driving mechanism of camera A step motor mounted inside a camera for moving a driven member is disclosed to include a yoke iron, which has a base, two arms respectively extended from two sides of the base, and four magnetic poles respectively formed on the free ends of the arms and each juncti... | 12/29/2009 |
| 7626291 | Drive apparatus A drive apparatus having a shortened axial dimension. First and second magnets are each formed into a semi-cylindrical shape and each provided with a magnetized pattern portion. A rotor yoke includes a shaft portion and a magnetic pole portion facing magnetized surf... | 12/01/2009 |
| 7605501 | Stepping motor and fan having the same A stepping motor includes: a stator including a coil that is wound so as to form a hollow space; a rotor including a magnet to be disposed in the hollow space of the coil, the rotor being rotationally driven by changing magnetic poles of the stator; and a mag... | 10/20/2009 |
| 7598633 | motor designed to ensure high efficiency in operation An ac motor is provided which includes a plurality of looped windings each of which extends in a circumferential direction of a stator. The stator is equipped with N stator pole groups made up of magnetic poles arranged along a circumference thereof. The looped wind... | 10/06/2009 |
| 7589440 | Stepping motor A stepping motor includes: a stator having main magnetic poles each having small stator teeth on its tip, a core-back portion that connects outer portions of the poles, and windings wound around the poles; and two sets of rotor units that are arranged in an axial di... | 09/15/2009 |
| 7586221 | Low vibration hybrid step motor A hybrid step motor has axially spaced first and second sets of rotor sections (or alternatively different sets of stator sections) characterized by different tooth widths. The rotor/stator tooth width ratio in one set is optimized for one-phase ON operation while t... | 09/08/2009 |
| 7573164 | Driving apparatus A driving apparatus includes a first magnet, second magnet, stator, first coil, second coil, first bearing, second bearing and rotor. The first and second magnets respectively have a magnetized portion in which S pole and N pole are alternately magnetized. The rotor... | 08/11/2009 |
| 7569953 | Rotor for hybrid type stepping motor and manufacturing method thereof Depressed portions for being fitted with two rotor collars 51, 52 are formed in two rotor stacks 72, 71 opposed to each other in an axial direction of the rotating shaft 1 with the rotor collars 51, 52 therebetween. Each of the rotor coll... | 08/04/2009 |
| 7560836 | Driving device and light amount adjusting device A light amount adjusting device mounted with a driving device which can have a reduced size in the direction of thickness. In this controller, a magnet is formed into a hollow circular disk shape and has at least one disk surface magnetized to have alternately diffe... | 07/14/2009 |
| 7518270 | Accurate microstepping motor A stepper motor includes a rotor having equally spaced rotor teeth defining a full step angle, and a stator with stator poles wound with coils that can be driven in a series of phases so as to magnetically interact with the rotor to produce stepping motion. The stat... | 04/14/2009 |
| 7511391 | Electromagnetic actuator An electromagnetic actuator has a rotor and a stator around which coils are wound to face portions of an outer surface of the rotor. The stator is C-shaped, the rotor is arranged so that a rotation axis thereof is existent in a space surrounded by the stator, and bo... | 03/31/2009 |
| 7459813 | Magnet rotor and electromagnetically-driving device using the same, and optical apparatus with light quantity-control device An electromagnetic device includes a magnet rotor having a rotary shaft and a stator having an excitation coil configured to apply a rotation force to the rotor. The magnet rotor includes a hollow cylindrical permanent magnet, a rotary shaft disposed in a hollow spa... | 12/02/2008 |
| 7449805 | Stepping motor and electronic apparatus A stepping motor includes a rotor having a cylindrical permanent magnet, ring-shaped first and second yoke units that are arranged so as to be mutually stacked along an axis of the rotor, and a pair of lid. Each of the first and second yoke units includes a ring-sha... | 11/11/2008 |
| 7446441 | Outer rotor type hybrid stepping motor An outer rotor type hybrid stepping motor including a stator, a rotor, a magnet disposed axially in either the stator or rotor, a stator core disposed inward from a gap formed between the stator and rotor, the rotor disposed outside the gap, and a stator winding wou... | 11/04/2008 |
| 7446442 | Stepping motor and drive device A stepping motor includes a rotatable cylindrical magnet circumferentially divided to be alternately magnetized with different magnetic poles, a first coil and a second coil disposed in positions where the first coil and the second coil are concentric with the magne... | 11/04/2008 |
| 7446443 | Electromagnetic-driving device and light quantity-control device incorporating the same An electromagnetically-driving device has a rotor with a hollow, cylindrical permanent magnet; an inside yoke on an internal circumference side of the rotor; an outside yoke on an external circumference side of the rotor; and a coil for magnetically exciting the yok... | 11/04/2008 |
| 7443061 | Driving device A driving device which is capable of delivering higher power and can be reduced in size. A hollow-cylindrical magnet (1) is magnetized so as to have circumferentially alternately different poles. First and second coils (2 and 3) are arranged con... | 10/28/2008 |
| 7443642 | Electric motor control A method and apparatus is disclosed for controlling a system comprising at least one electric motor. The system includes aspects which permit, among other things, electromagnetically disconnecting a failed permanent magnet motor from said system, weight savings in m... | 10/28/2008 |
| 7436090 | Direct drive hybrid rotary motor A rotary motor shaft extends through a rheological brake unit through which variable braking resistance to rotation of the motor shaft is applied while it undergoes rotation in response to torque mechanically applied thereto in sequence through a peripheral gear by ... | 10/14/2008 |
| 7420303 | Motor A motor includes a bearing receiving the shaft end of a rotor. a bearing holder provided with a through hole into which the bearing is inserted, a spring member which is disposed on one end side of the bearing holder and provided with a plate spring part which urges... | 09/02/2008 |
| 7414340 | Motor A motor may include a rotor provided with a permanent magnet, a stator whose inner peripheral face faces an outer peripheral face of the permanent magnet, a first radial bearing fixed to an end portion on an output side of the stator for rotatably supporting the rot... | 08/19/2008 |
| 7411322 | Micromachined reluctance motor A reluctance motor having a movable part that does not need a fixed mounting shaft in the motor's stationary part. In one embodiment, a motor of the invention has a stationary part that defines a cylindrical cavity into which a rotor is inserted, with an interior wa... | 08/12/2008 |
| 7408277 | Step-by-step motor able to carry out up-and-down motion A step-by-step motor able to carry out up-and-down motion includes a housing, a bearing, a connecting member, a magnet, a rod unit, a right-handed coil, a reverse coil and a bayonet socket combined together. After the electric wires of the bayonet are electrically c... | 08/05/2008 |
| 7385321 | Motor having shifted teeth of pressed powder construction A multi-polar rotary machine comprises a cylindrical outer rotor arranged concentrically with the stator and with an air gap therebetween. The stator has two spaced stator elements and a ring shaped permanent magnet held between the stator elements and magnetized so... | 06/10/2008 |
| 7385320 | Step motor A step motor includes a rotor having four magnetic poles, a first magnetic pole magnetically excited by a first coil, a second magnetic pole magnetically excited by a second coil, and a third magnetic pole magnetically excited by the first coil and the second coil. ... | 06/10/2008 |
| 7378768 | Stepping motor and method of manufacturing the same An object of the present invention is to provide a stepping motor capable of reducing the number of components and the number of assembling steps, and its manufacturing method. In order to achieve the object, a stepping motor according to the present invention is co... | 05/27/2008 |
| 7375446 | Actuator including rotor case and housing with sealing unit for hermetic structure An actuator for use with a fluid channel structure comprises: a stator assembly including stator yokes, and a coil; and a rotor assembly including a housing shaped in a circular hollow-cylinder, an output shaft inserted through the housing, a sleeve, a magnet fixedl... | 05/20/2008 |
| 7372179 | Stepper motor having solenoid coils around end portions of stator poles A stepper motor includes a rotor having a ring-shaped body having a circumference along which a plurality of magnetic poles of alternates. A plurality of stator members is arranged along and spaced from the circumference of the rotor. Each stator member has two limb... | 05/13/2008 |
| 7368840 | Brushless motor The brushless motor includes: a housing; a stator which is stored and fixed in the housing; a rotor which is rotatably arranged inside the stator; a bracket which is fixed to the housing; a rotation detector which is fixed to the bracket and the housing and detects ... | 05/06/2008 |
| 7365472 | Electric generator An electric generator 10 of the present invention comprises a permanent magnet 14, a coil 30, a yoke 20, and attracted means 19 composed of a plurality of attracted pieces 18 which are arranged radially around the rotation a... | 04/29/2008 |
| 7362021 | Moisture-proof device for motor A moisture-proof device is provided to be used in a fan having a stator for isolating the stator from moisture. The moisture-proof device includes a first covering part for covering a circuit board of the stator of the motor, and a second covering part connected to ... | 04/22/2008 |
| 7358629 | Electromagnetic actuator The rotational torque of an electromagnetic actuator having a stator and rotor, such as a stepping motor, is increased. The electromagnetic actuator includes a rotor (30) having multiple magnetic poles (Nr1, Nr2, Nr3, N... | 04/15/2008 |
| 7358632 | Motor which performs a rotational-to-linear motion conversion A sliding hole is formed so that a screw portion can pass therethrough. Also, a seal member is provided at a portion, through which the screw portion placed in the sliding hole can pass and in which a sliding portion does not slide. ... | 04/15/2008 |
| 7355308 | Mover combination with two circulation flows A circulation system (330) for a mover (328) includes a fluid source (360) that directs a first fluid (356) into a first inlet (364A) of the mover (328) and a second fluid (358) into a second inlet (366A) of th... | 04/08/2008 |
| 7352089 | Driving apparatus A driving apparatus includes a stepping motor having a lead screw, a rack, and a rack-retaining bar, a barrel, a barrel-retaining bar, and a connecting spring for connecting the rack to the barrel. The connecting spring includes an engaging portion that engages with... | 04/01/2008 |
| 7348696 | Stepping motor A stepping motor comprises a stator core, a drive coil which is attached to the stator core and a terminal block having a plurality of terminal pins to be wound with the terminals of the drive coil windings. The stator core and terminal block have respective fitting... | 03/25/2008 |
| 7348698 | Actuator for operating a transmission control valve of an automatic transmission apparatus A rotor having magnets composed of rare-earth magnets is rotatably disposed inside an exterior casing, a penetrating aperture is disposed through a first end of the exterior casing relative to a direction of a motor central axis, and a filter is disposed so as to co... | 03/25/2008 |
