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| Number | Title | Issue Date |
| 8368263 | Universal motor A universal motor has a rotor and a stator. The stator comprises a pair of symmetrical C-shaped stator cores and two windings respectively wound on the stator cores. Each stator core comprises a yoke and a pair of poles extending from opposite ends of the yoke. The ... | 02/05/2013 |
| 8330320 | Sliding contact material, clad composite material, and motor [Problem to be Solved] There is provided a highly wear-resistant and durable sliding contact material applicable to a commutator of a motor used for high-capacity applications in which the initial starting current (IS) is 1 ampere or higher. [Solution]... | 12/11/2012 |
| 8274193 | Electric motor The windings (12) wound around each of the teeth (9) form two coil groups (71, 72) of three-phase concentrated windings which are disposed point-symmetrically to each other with respect to the rotational shaft. Each of the coil groups (71, 72... | 09/25/2012 |
| 8125117 | Electric motor and rotor therefor An electric motor includes: a rotor; a stator; and brush gear. The rotor has a shaft, a rotor core and a commutator fitted to the shaft. The rotor core has 5n teeth, n being a positive integer. Two coils are wound on each tooth with each coil being wound about a sin... | 02/28/2012 |
| 8018116 | Electric motor of parallel cycles A motor arrangement between the movable body and the commutation system comprising movable body coils assembling, wherein said movable body coils assembling are energized for short periods of time of an electric cycle in order to initiate a movement at the movable b... | 09/13/2011 |
| 7990017 | DC motor having enhanced startability A dc motor is provided which is equipped with brushes each of which is urged by a spring pressure into constant abutment with a commutator surface. A plurality of protrusions are arrayed on the commutator surface in a direction perpendicular to a direction in which ... | 08/02/2011 |
| 7876017 | Commutator and brush materials for small electric motor, clad composite material, and small electric DC motor using the same An object of the present invention is to provide a commutator or brush material for a small electric DC motor which enables a lengthened operating life of a spindle motor for a DVD controlled using a pulse current. A commutator material for a small electric DC motor... | 01/25/2011 |
| 7847467 | Automotive engine starter and electric rotary machine designed to withstand vibrational impact An electric rotary machine which may be employed as a dc motor in an automotive engine starter. The motor includes an armature equipped with an armature shaft, a commutator, brushes, and a bearing retaining an end of the armature shaft. The surface of the commutator... | 12/07/2010 |
| 7772739 | Commutator, direct current motor, and manufacturing method of commutator A commutator has a tabular holding portion defining a thickness direction. A plurality of segments are arranged in one end in the thickness direction of the holding portion in a radial pattern. Each of the segments has a slidable contact surface which is perpendicul... | 08/10/2010 |
| 7709993 | Continuous direct current generator A continuous direct current generator comprises a plurality of windings, each being adapted to rotate between two magnetic fields and in unison with a rotator having a plurality of brush contacts. The windings are electrically connected to the brush contacts which d... | 05/04/2010 |
| 7605516 | Motor, commutator, short-circuit member, and a method for manufacturing the commutator A commutator connected to armature coils includes circumferentially arranged segments, short-circuit conductors, and a surge absorbing element. The number of the segments is a multiple of the number of the armature coils. The segments include a plurality of pairs of... | 10/20/2009 |
| 7583004 | Short-circuiting member, commutator, and method of manufacturing short-circuiting member A short-circuiting member for preventing a commutator from being elongated in the axial direction without increasing the types of different components. The short-circuiting member includes components, each having outer and inner circumferences. Each component includ... | 09/01/2009 |
| 7462972 | Commutator for an electric machine A commutator for an electric machine comprises a support member made from insulating molding compound, a plurality of metal conductor segments (3), disposed thereon in evenly spaced manner around the commutator axis, with terminal elements disposed thereon fo... | 12/09/2008 |
| 7414345 | Commutator and armature A commutator including a commutator main body having a plurality of commutator pieces and a short-circuit member having a short-circuit conductor for short-circuiting commutator pieces. The short-circuit conductor includes superimposed first and second short-circuit... | 08/19/2008 |
| 7414344 | Commutator and an armature A commutator main body 11 includes a plurality of commutator pieces 13 arranged along a circumference, the center of which is a rotation axis L of a motor, and a main body insulator 14 holding the commutator pieces. A short-circuit member 12 | 08/19/2008 |
| 7400077 | Electric motor having multiple armatures An electric motor that includes a housing, a rotatable axle, a first field armature, which is disposed substantially around the axle and secured to the axle, and which includes a plurality of first field magnets spaced around the first field armature, a second field... | 07/15/2008 |
| 7396217 | Fuel pump to be installed inside fuel tank A fuel pump for supplying fuel drawn from a fuel tank into an internal combustion engine comprises a rotor, a rotation shaft, bearing members and a drawing force generative means. The rotation shaft revolves integrally with the rotor. The bearing members support bot... | 07/08/2008 |
| 7375452 | Commutator for an electrical machine A commutator for an electrical machine, in particular for an electric motor for actuating drives in motor vehicles, has a commutator body that supports commutator laminations. To reduce the electromagnetic radiation, emitted into the environment as interfering radia... | 05/20/2008 |
| 7362020 | Commutator housing with an overcurrent protection device A commutator housing for a direct-current motor includes conductive tracks and two Lyre-shaped connectors each inserted in one of the conductive tracks. An overcurrent protection device is inserted in series in the conductive tracks, and electrical connection pins o... | 04/22/2008 |
| 7362029 | Fuel pump comprising an electric motor The invention relates to a fuel pump which comprises an electric motor. Said electric motor is provided with carbon brushes (11) that cover a plurality of lamellae (17) of a collector (9). Grooves (7) in an armature (6) include sec... | 04/22/2008 |
| 7352103 | Motor assembly with a sealed commutator/brush interface A motor assembly includes a commutator having a shaft extending axially therefrom, a commutator end bracket assembly, and at least two brushes carried by the commutator end bracket assembly and in contact with the commutator. A disc is carried by the commutator for ... | 04/01/2008 |
| 7352100 | Direct-current motor A stator of a direct current motor includes six magnetic poles. An armature of the direct current motor includes an armature core having eight slots, a plurality of windings wound around the armature core as concentrated windings, and a commutator having twenty-four... | 04/01/2008 |
| 7327061 | AC generator and method One aspect of the invention is a generator with at least two commutators mounted on a rotatable shaft. At least two magnetically conductive bars may be mounted in an opposed relationship with at least one of the bars passing through a wire coil. At least two magnets... | 02/05/2008 |
| 7327058 | Vibration motor having brushes with different osculatory tracks A vibration motor includes a stator assembly, a rotor assembly, a shaft and a pair of brushes having different osculatory tracks. The stator assembly includes a magnet and a lower substrate. The rotor assembly has an eccentric weight, and includes a commutator posit... | 02/05/2008 |
| RE39974 | Management of contact spots between an electrical brush and substrate Devices for the management of contact spots, partly consisting of surface plating, partly of surface polishing and partly of substrate surface profiling in the form of parallel grooves stretched out in the direction of sliding and/or of isolated asperities. The mana... | 01/01/2008 |
| 7309938 | Rotary power converter A rotary power converter apparatus for coupling power between a prime driver and plural generators. The apparatus includes a frame having a first and second bearing aligned along an axis of rotation and a rotor assembly supported thereby. The rotor assembly includes... | 12/18/2007 |
| 7285931 | Brushless motor commutation and control A commutation apparatus drives a brushless motor having a stator equipped with a plurality of coils and a rotor. The commutation apparatus comprises a rotatable commutator shaft, two or more conducting rings carried discretely about the shaft, and two or more conduc... | 10/23/2007 |
| 7285929 | Brushless motor commutation and control A commutation apparatus drives a brushless motor having a stator equipped with a plurality of coils and a rotor. The commutation apparatus comprises a rotatable commutator shaft, two or more conducting rings carried discretely about the shaft, and two or more conduc... | 10/23/2007 |
| 7265315 | Method of joining terminals by soldering A method of joining terminals by soldering is provided which allows control of increasing gas supply even in soldering performed in a gas atmosphere within a gas chamber. Utilizing a springback phenomenon occurring at a flat portion of a terminal, a solder joint of ... | 09/04/2007 |
| 7265471 | Apparatus and process for generating energy Energy is generated by an apparatus and process which utilize magnetic forces to move a rotor in a circular direction to turn a rotor shaft. This apparatus and process convert magnetic energy into mechanical force or electrical energy. ... | 09/04/2007 |
| 7259494 | Vehicular alternator with a pair of dissimiliar metal alloy collector rings A vehicular alternator includes a rotor, a stator and a brush device. The rotor includes a rotor coil wound around pole cores and a pair of collector rings electrically connected with the rotor coil. The stator is disposed around an outer periphery of the rotor acro... | 08/21/2007 |
| 7247963 | Eccentric rotor and vibration motor using such eccentric rotor Because the bearing of an eccentric rotor is small, when it is integrated in a rotor by resin molding, the bearing unit can be fractured by impacts unless it has a sufficient mounting strength. Accordingly, an eccentric rotor is provided in which a sufficient mounti... | 07/24/2007 |
| 7239063 | Motor having supply brushes A motor has a plurality of excitation coils, a commutator having a plurality of segments, a plurality of supply brushes and a short-circuit line. Each coil is connected to corresponding ones of the segments. The supply brushes include a plurality of supply brushes e... | 07/03/2007 |
| 7221070 | Electric appliance with terminal An electric appliance has a first terminal and a second terminal electrically connected to the first terminal. The first terminal has a soldering portion for soldering the second terminal thereon. The soldering portion has a smooth face and a rough face disposed on ... | 05/22/2007 |
| 7202586 | Electrical contact member There is provided an electrical contact member where wear can be reduced. The electrical contact member is characterized by one or both of conductive metal particles and conductive metal fibers, at least outer circumferential surfaces of which have been modified wit... | 04/10/2007 |
| 7196440 | Electric manual machine tool driven by an electric motor A hand power tool that is driven via an electric motor (20), the electric motor (20) having a commutator (28) which is formed of disklike annular segments or laminations (32), is made more secure against contact spark development by provi... | 03/27/2007 |
| 7180213 | Vibration motor having brushes with different osculatory tracks A vibration motor includes a stator assembly, a rotor assembly, a shaft and a pair of brushes having different osculatory tracks. The stator assembly includes a magnet and a lower substrate. The rotor assembly has an eccentric weight, and includes a commutator posit... | 02/20/2007 |
| 7173355 | Bar-type vibration motor A bar-type vibration motor has a stator unit including a body and a magnet attached in the body; a rotor unit including a rotary shaft having one end fixed to an eccentric weight and the other end fixed to a stationary member, a portion of the rotary shall adjacent ... | 02/06/2007 |
| 7157824 | Coin type vibrating motor Disclosed is a coin type vibrating motor including: a rotor provided with an upper base including at least one wound coil placed on the upper surface thereof; a stator including a pair of brushes placed on the upper surface of a lower base, on which a magnet is moun... | 01/02/2007 |
| 7148602 | Commutator A commutator is provided which can be produced at low cost and is excellent in wear resistance and can be used in the fuel pump. The commutator is one in which at least those portions which come into contact with brushes comprise a filler mainly consisting of coke, ... | 12/12/2006 |
