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| Number | Title | Issue Date |
| 7936105 | Audible brush wear indicator for rotating electric machines An electric machine incorporates a brush assembly that provides an audible warning when the brush in the brush assembly approaches the end of its useable length. The brush incorporates a device incorporated into the brush or a brush design which cooperates with the ... | 05/03/2011 |
| 7928629 | Direct current motor A stator has four or more magnetic poles. A commutator has a plurality of segments arranged in the circumferential direction and a short-circuit conductor for short-circuiting predetermined segments from among these segments. Each segment has an angular width WS, an... | 04/19/2011 |
| 7893593 | 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... | 02/22/2011 |
| 7888838 | Electrical device comprising a carbon brush shape adapting device In an electrical device, in particular a power tool, equipped with a commutator motor, and in an accessory for an electrical device of this kind, a carbon brush shape adapting device is an integral component of the electrical device or of the accessory. ... | 02/15/2011 |
| 7768175 | Brush manufacturing method, motor manufacturing method, brush, motor, and electromotive power steering device A manufacturing method for a brush that can reduce contact surface area between a commutator and the brush, thereby reducing frictional noise, is provided. Specifically, a method to manufacture a brush, which provides one surface with contact surfaces that make slid... | 08/03/2010 |
| 7629723 | Detection of the amount of wear on a motor drive system A method and a device, respectively, for detecting the amount of wear on the carbon brush drive system of an electrically commutated d.c. motor which is used, for example, in the form of a pump motor in a motor vehicle. The d.c. motor is driven by at least two carbo... | 12/08/2009 |
| 7557485 | Ion conducting electrolyte brush additives The present invention's unique utilization of an electrolytic solution renders more efficient the conduction of electricity between two objects (such as two parts of electrical or electromechanical machinery) in relative motion. According to typical inventive practi... | 07/07/2009 |
| 7545073 | Fluid-dispensing reservoir for large-diameter slip rings The invention provides an improvement in a slip ring (20) adapted to provide electrical contact between a stator (21) and a rotor (22). The improvement includes: a current-carrying conductor (23) mounted on the stator; a brush tube (24... | 06/09/2009 |
| 7423359 | Fluid-dispensing reservoir for large-diameter slip rings The invention provides an improvement in a slip ring (20) adapted to provide electrical contact between a stator (21) and a rotor (22). The improvement includes: a current-carrying conductor (23) mounted on the stator; a brush tube (24... | 09/09/2008 |
| 7362030 | Brush type small motor having non-linear spring device A spring device includes of a coil spring case formed of right, left, back and front side plates and a spring receiving plate, a coil spring having a linear spring property, and a spring urging member for urging the coil spring into the coil spring case. A distance ... | 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 |
| 7358641 | Brush device for rotary electric machine A brush device assembled in a vehicular alternator is composed mainly of a pair of brushes, a pair of springs, and a brush holder. The brush holder accommodates the brushes and the springs. The springs push the brushes toward slip rings placed on and fixed to a rota... | 04/15/2008 |
| 7339302 | Electrical contact technology and methodology for the manufacture of large-diameter electrical slip rings The present invention provides several improvements in a slip ring (36) that is adapted to provide electrical contact between a rotor (42) and stator (40). In one aspect, a brush tube (39) is crimped around the upper marginal end portions... | 03/04/2008 |
| 7308759 | Method for production of a multi-layer carbon brush A method for production of a multi-layer carbon brush including at least two electrically-conducting functional layers made from carbon material and at least one insulation layer made from an electrically-insulating material, running between consecutive functional l... | 12/18/2007 |
| 7291957 | Universal terminal bar structure with ground contacting feature integrated into a body structure with versatile RFI suppression for electric motors A method of providing RFI suppression in a DC motor provides a universal terminal bar structure 70 including a positive terminal bar 72 and a negative terminal bar 76, a first choke 80 electrically connected with the positive terminal bar... | 11/06/2007 |
| 7265475 | Electric motor having convex high-speed brush A two speed direct current electric motor comprising: an armature having a commutator assembly that is adapted to receive an electromotive force to cause the armature to operatively rotate. A brush assembly having a common brush and a low-speed brush is disposed abo... | 09/04/2007 |
| 7242127 | Brush device and motor with brush A brush device having the longitudinal direction of a coil shaped coil spring aligned with the face of a brush holder, in which one end of a support post at the surface of a brush base is formed as a hollow cylinder and a projection at the other end is insert molded... | 07/10/2007 |
| 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 |
| 7199499 | Homopolar machine with brush improvement The wear life of flexible copper fiber brushes when used at a positive pole in a direct current motor or generator is improved by the provision of an effective amount of zinc as a sacrificial anode material. Flame-sprayed zinc is applied as a coating to the exterior... | 04/03/2007 |
| 7193349 | Brush holder for a carbon brush An electric motor, in particular a motor and gear box unit for activating functional equipment in a vehicle, includes a rotor shaft carrying a commutator co-operating with conductive brushes disposed in brush supports fixed to a printed circuit card; the motor is pr... | 03/20/2007 |
| 7188407 | Brush assembly A brush assembly (10) for a miniature electric motor has a beryllium copper strip brush arm (14) and a graphite material brush head (12) moulded to an end thereof. The brush arm (14) has a number of apertures. The brush head (12) h... | 03/13/2007 |
| 7180218 | Compression journal A compression journal for transfer of microwave signals across a rotating interface of a rotary joint comprises a silver impregnated graphite split ring stator which surrounds and is in contact with a coin silver sleeve of a shaft rotor when a rotor assembly is posi... | 02/20/2007 |
| 7154203 | Motor and brush device A motor and a brush device are provided which allow an easy assembly of brush holders. The brush holders have fixing portions and brush accommodating portions integrally formed therewith. The fixing portions are secured to the gear case, and the brush accommodating ... | 12/26/2006 |
| 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 |
| 7145279 | Mount part for commutator brushes of an electric motor The invention relates to a support element on which the commutator brushes are each disposed on one curved spiral spring each. Said spring, on its side facing away from the commutator brush in the area of the end of the coil is trapezoid and is braced between an out... | 12/05/2006 |
| 7141907 | Bracket assembly of universal motor A bracket assembly of a universal motor comprises: a bracket composed of a base portion formed as a certain shape and coupled to a motor stator, a plurality of supporting portions extendingly formed at the base portion with a certain length, a bearing mounting porti... | 11/28/2006 |
| 7138744 | Brush of rotary electric machine A brush to be disposed on a commutator of a dc rotary electric machine includes a high resistance member to be positioned at a front side of the commutator in the rotation direction, a low resistance member to be positioned at a back side in the rotation direction o... | 11/21/2006 |
| 7138743 | Solid and liquid hybrid current transferring brush The moving slip ring surface of electrical machinery transfers electrical current by contact thereof with liquid metal directly or through the tips of a plurality of closely spaced brushes positioned along the bottom of a housing under pressure within which the liqu... | 11/21/2006 |
| 7132777 | Electric motor and brush retaining assembly The present invention generally provides a motor-fan unit including a motor assembly having a shaft, a commutator supported on the shaft, and a pair of brushes in electrical contact with the commutator, a fan assembly having an impeller coupled to the shaft, an end ... | 11/07/2006 |
| 7119473 | Brush card assembly with RFI suppression for two or three speed permanent magnet brush motor with link wound dual commutator and dual armature winding configuration A brush card assembly 30 is provided for a permanent magnet brush motor 50. The motor includes a link wound, high speed side commutator 46 and an associated high speed side armature winding 44, and a link wound low speed side commutator | 10/10/2006 |
| 7109628 | 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... | 09/19/2006 |
| 7105969 | Two speed electric motor with link wound dual-commutator and dual-armature winding A permanent magnet D.C. electric motor includes a stator housing, permanent magnet structure, and an armature assembly. The armature assembly includes a shaft rotatably mounted in the stator housing, lamination structure, first and second coil windings associated wi... | 09/12/2006 |
| 7105977 | Metal-graphite brush and motor including metal-graphite brush A metal-graphite brush for supplying electricity to a coil wound around a core provided at a rotor of a motor is made of sintered material having porosities at a surface and inside thereof, and the porosities is infiltrated with a conductive liquid having a boiling ... | 09/12/2006 |
| 7071643 | Dual speed quad brush two pole motor system A motor system includes four brushes electrically connected to a rotor. A stator includes two magnetic poles. A circuit selectively rotates the rotor at a first speed by applying a first voltage to a first of the brushes and a second voltage to a second of the brush... | 07/04/2006 |
| 7067951 | Copper-graphite brush A copper-zinc alloy powder of which zinc content is from 10 to 50 wt % and of which mean particle diameter is from 15 μm or under is added to a Pb-less brush body comprising graphite, copper and a metal sulfide solid lubricant of a copper-graphite brush. ... | 06/27/2006 |
| 7059038 | Brush assembly A brush assembly has a base with a member to secure the base to a motor end cap assembly. A brush housing is associated with the base. The brush housing includes first and second open ends. A brush, defining an axis, is slidably supported within the housing. The bru... | 06/13/2006 |
| 7014432 | Fuel pumping unit, with a plurality of commutator brush assemblies with engaging members for restricting brush movement toward the pump motor section A fuel pump includes a housing, a pump section, a motor section including a commutator, a cover disposed at one end of the housing, a pair of brushes disposed in a pair of brush holes formed in the cover to be in contact with the commutator; and a pair of brush spri... | 03/21/2006 |
| 7006761 | Control device for DC motors In order to design as inexpensively as possible a control device for DC motors which are provided with a commutator for feeding their motor windings which has at least four sliding contacts, this device comprising a modulation stage which generates at least one cont... | 02/28/2006 |
| 6989617 | Command component assembly for alternator to automatic vehicle A brush holder for a vehicle electrical machine having an insulating support, an electrical circuit including a semiconductor control component; and at least one metallic heat dissipation member in contact with the ambient environment and arranged to receive heat fr... | 01/24/2006 |
| 6975059 | Electric motor An object of the invention is to improve a layout property of members arranged on the brush holder. Power feeding terminals are formed in a flat shape extending in an axial direction of an armature shaft, and the power feeding terminal is arranged side by side in a ... | 12/13/2005 |
