Abstract: A method and apparatus for operating an electric motor is presented. A transmit magnetic field is received at a group of receive coils having a group of axes oriented substantially parallel to magnetic field lines from a transmit coil and having a group of resonant frequencies. A resonant frequency in the group of resonant frequencies is different from other receive coils in the group of receive coils. A receive magnetic field is generated at a receive coil in the group of receive coils having the resonant frequency when the transmit magnetic field has a selected frequency matching the resonant frequency. The receive magnetic field attracts a rotor in the electric motor.

Abstract: An electric direct current motor is disclosed which includes a shaft, a winding support, a collector having several collector wires, and an air-cored outer rotor winding with several winding terminations. The outer rotor winding is at one end connected to the shaft via the winding support in a torque-proof manner, and is electrically connected with the collector. The winding support can be replaced by a printed circuit board as a bearing component of glass-fiber reinforced thermosetting plastics, wherein the printed circuit board includes at least one layer and is connected to the shaft via a metal hub.

Abstract: An electric machine comprises a sealed outer casing defined by a body and by a cover coupled to the body, a stator and a rotor the latter two being mounted inside the casing; the stator is of a wound type and comprises a core having at least two pole pieces and a plurality of windings each defined by a conductor wire wound in a plurality of coils around the pole pieces; the electric machine further comprises a plurality of plastic components located inside the casing and made of a plastic material whose moisture absorption at saturation is less than 0.8%, having insulating and/or supporting and/or cooling functions.

Abstract: An electric connector assembly is provided that is designed to provide a simple and reliable electric connection between a source of electric power on an aircraft and a plurality of electrical connections, such as those from stator windings, in an electric drive means powering an aircraft landing gear drive wheel. The plurality of drive means electrical connections are individually connected to power distribution elements designed to significantly reduce the number of connectors required to establish an electrical connection between the drive means and an aircraft power supply. The reduced number of connectors is directed out of the wheel and guided along a path by a path guide element to a connector element designed to connect directly with a wire harness or other connection with an aircraft source of electric power. This electric connector design facilitates disconnection and reconnection when removal and remounting of the drive wheel is required.

Abstract: An electric direct current motor is disclosed which includes a shaft, a winding support, a collector having several collector wires, and an air-cored outer rotor winding with several winding terminations. The outer rotor winding is at one end connected to the shaft via the winding support in a torque-proof manner, and is electrically connected with the collector. The winding support can be replaced by a printed circuit board as a bearing component of glass-fiber reinforced thermosetting plastics, wherein the printed circuit board includes at least one layer and is connected to the shaft via a metal hub.

Abstract: A commutator has a plurality of commutator segments fixed to an insulating support member. The commutator segments are formed by cold or hot forming a copper billet cut from a length of copper wire. Each billet has a volume approximately equal to the volume of one commutator segment. Each commutator segment has a main body and an anchor integrally formed with the main body. The commutator segments are spaced about a circle and then an insulating support member is molded to the commutator segments to fix the commutator segments to the support member.

Abstract: A segment of a carbon commutator includes a carbon layer on a surface side and a metallic carbon layer on a bottom side, and the carbon layer and the metallic carbon layer both contain a thermoplastic resin binder.

Abstract: A disk motor and an electric power tool in which positioning of a coil disk with respect to a commutator disk can be carried out while reliably ensuring insulating properties are provided. A disk motor having: an output shaft part; a coil disk that is provided with a coil pattern and provided coaxially to the output shaft part; a commutator disk that is provided with a commutator pattern and provided coaxially to the output shaft part; and a positioning pin that is electrically insulated from the coil disk and the commutator disk, is engaged with the output shaft part and the coil disk, and carries out positioning of the coil disk with respect to the output shaft part, and an electric power tool having the disk motor are provided.

Abstract: A motor has an output shaft which is rotatably supported by a housing, a rotor which is fixed to the output shaft and which comprises a printed-wiring board, and a stator which is fixed to the housing and which comprises a magnet facing the rotor. The printed-wiring board comprises a coil/commutator disk and a coil disk. A commutator conductor pattern is formed in a commutator region of the coil/commutator disk. Likewise, coil conductor patterns are formed in respective coil regions of the coil/commutator disk and of the coil disk.

Abstract: Disclosed herein is a switched reluctance motor including: a shaft rotatably supporting the switched reluctance motor in an axial direction; a cylindrical part provided at a central portion of the shaft and movable vertically; an elastic member formed to enclose the shaft, formed from an upper portion of the shaft to an upper portion of the cylindrical part to thereby support a rise of the cylindrical part, and having elasticity; commutator segments attached to an outer peripheral surface of the cylindrical part and having a cylindrical shape; brushes contacting or not contacting the commutator segments according to vertical movement of the cylindrical part; and a propeller provided on a lower portion of the cylindrical part and pushing air at the time of rotation to thereby move the cylindrical part upwardly.

Abstract: A flat commutator having a support body, carbon segments, and conductor segments. The support body is formed on a carbon ring disk, which is later separated into carbon segments that are insulated from one another, the support body sitting against the carbon ring disk radially outward, radially inward, and against the end face of the carbon ring disk, the end face lying opposite the brush contact surface. The conductor segments are subsequently applied individually such that a contact pin of each segment penetrates a cavity that extends from the support body surface lying opposite the brush contact surface to the surface of the segments or of the carbon ring disks, the surface lying opposite the brush contact surface; and the free end of the contact pin contacts the surface of the segments or of the carbon ring disk, the surface lying opposite the brush contact surface.

Abstract: A carbon commutator, for an electric motor, has a plurality of segments forming a brush contact surface and a hub supporting the segments. Each segment has a connector having a terminal for connection of a lead wire, a carbon layer forming the brush contact surface, and a connecting layer fixed to the carbon layer and electrically connecting the carbon layer to the connector. A plurality of micro structures is formed at the interface between the connecting layer and the carbon layer.

Abstract: The invention relates to a six-pole DC machine, particularly a DC motor for use in a motor vehicle, having a stator (16) excited preferably by a permanent magnet and a rotor (20) which is rotatably supported in a pole housing (12) and which has a wave winding (23) and a commutator (24), and having a brush carrier (28) for holding the brushes (26) and preferably additional components (30, 31; 32). In contrast to a full equipping, the brush arrangement has less than six brushes (26), which are arranged on the circumference of the commutator (24) at an angular distance of approximately 60° to each other. Thus, the ripple of the rotor current, the torque oscillations, and the noise emission are clearly reduced and free space is created on the brush carrier for accommodating suppressor components (30, 31; 32).

Abstract: A commutation system for a DC motor having a stator including a plurality of windings and a permanent magnet assembly, the assembly has a housing; at least three collector segments connected to stator windings inside the housing; and a rotor assembly in the housing having brushes for connecting the collector segments, the brushes extending from the rotors parallel to the motor axis; wherein the brushes are attached to the rotors to rotate coaxially to each other and contact the surfaces of the collector segments. The system includes proper mechanism for heat conduction from the brushes sliding surface to the external wall. Damping is provided to limit resonance in the commutation system. Also air filtering can be provided to insure clean operation.

Abstract: An electric drive machine having a stator and a rotor, the rotor carrying a rotor winding, in slots, which is able to be supplied with electric current by a power supply system made up of a commutator and sliding contacts, the sliding contacts pressing on the surface of the commutator having at least two pairs each made up of one positive sliding contact and one negative sliding contact, and in the case of at least one first pair of a positive sliding contact and a negative sliding contact, the positive sliding contact and the negative sliding contact being opposed at an angle ?, which deviates from 180°.

Abstract: A plurality of electrode patterns constituting a plurality of commutator segments are provided on one surface of a commutator disk. A plurality of first communication patterns are provided on the other surface of the commutator disk. The respective communication patterns mutually connect first-group (odd-numbered) electrode patterns between which seven electrode patterns are sandwiched. A connection disk having the same shape as the commutator disk is provided on the commutator disk, and second communication patterns mutually connecting second-group (even-numbered) electrode patterns between which seven electrode patterns are sandwiched are provided on the connection disk.

Abstract: A method of manufacturing a commutator. A connector plate is formed with a plurality of connectors arranged circumferentially about a central opening and interconnected by links, with each connector having a terminal portion, a segment portion and a number of anchors, with adjacent segment portions being separated circumferentially by slits. A conductive layer is fixed onto a first face of the segment portions to form a brush contacting surface. The connectors are separated by severing the links. The base is fixed to a second face of the connectors. Then the conductive layer is separated into circumferentially arranged segment parts by cutting radial slots through the conductive layer aligned with the slits, the width of the slots being narrower that the width of the slits to avoid cutting the connectors.

Abstract: A commutator has an electrically non-conductive base and a plurality of commutator segments fixed to the base. Each segment comprises an electrically conductive connector and a segment part, wherein the connector has a segment portion, a terminal portion and anchors all formed as a monolithic construction. The terminal and anchors extend from the segment portion at radial ends thereof. The anchors fix the connectors to the base by being embedded therein. The segment part is a part of an annular disc forming an electrically conductive brush-contacting layer fixed to a side of the segment portion remote from the base. The segment portions are circumferentially separated by slits into which the base extends and the segment parts are separated circumferentially by slots. The slots are aligned with the slits, are narrower than the slits and extend axially into the material of the base within the slits between adjacent connectors.

Abstract: A flat commutator having a support body, carbon segments, and conductor segments, wherein the support body is formed on the carbon ring disk, which is later separated into carbon segments that are insulated from one another, the support body sitting against the carbon ring disk radially outward, radially inward, and against the end face of the carbon ring disk, said end face lying opposite the brush contact surface. The conductor segments are subsequently applied individually such that a contact pin of each segment penetrates a cavity that extends from the support body surface lying opposite the brush contact surface to the surface of the segments or of the carbon ring disks, said surface lying opposite the brush contact surface; and the free end of said contact pin contacts the surface of the segments or of the carbon ring disk, said surface lying opposite the brush contact surface.

Abstract: The invention relates to a commutator with contact segments, arranged at a distance from each other and forming a brush running surface. Each contact segment is soldered to a securing portion of a metal segment support piece. The commutator has a hub body made from an electrically insulating material which supports the segment support pieces which are each provided with a winding connector hook. According to the invention, at least one solder barrier recess is provided in the upper side of the securing portion facing the contact segment and/or in the under side of the contact segment facing the securing portion.

Abstract: A segment of a carbon commutator includes a carbon layer on a surface side and a metallic carbon layer on a bottom side, and the carbon layer and the metallic carbon layer both contain a thermoplastic resin binder.

Abstract: A motor has an output shaft which is rotatably supported by a housing, a rotor which is fixed to the output shaft and which comprises a printed-wiring board, and a stator which is fixed to the housing and which comprises a magnet facing the rotor. The printed-wiring board comprises a coil/commutator disk and a coil disk. A commutator conductor pattern is formed in a commutator region of the coil/commutator disk. Likewise, coil conductor patterns are formed in respective coil regions of the coil/commutator disk and of the coil disk.

Abstract: A commutator 10 comprises an electrically non-conductive base 12; and a plurality of electrically conducting segments 16 supported by the base 12. Each segment 16 comprising a first electrically conductive inner layer 18 provided on the base 12, and a second electrically conductive outer layer 20 fixed to the inner layer 18. The inner and outer layers 18, 20 have opposing surfaces 21, 22 which abut each other, once the commutator is assembled. An opening, preferably being a recess 30, for receiving flux and/or air during the fixing of the outer layer to the inner layer is provided in at least one of the opposing surfaces 21, 22. There is also provided a DC electric motor which includes such a commutator 10.

Abstract: A permanent magnet power generator which, when used at an electric power generating facility such as a wind power plant, etc., would not be bulky and would not impede wind capture by a wind turbine; instead, it can raise the generated voltage without impeding wind capture has a generator shaft; at least three rotors, which are secured with the generator shaft, constituted by a plurality of plate-shaped structures having a permanent magnet attached thereto, and each disposed in the longitudinal direction of the generator shaft; and a stator, which is plate-shaped with a stator coil disposed in at least two gaps formed by the rotors, evenly-spaced apart from the generator shaft. The rotors and stators are disposed alternately in the longitudinal direction of the generator shaft, with a total of at least five stages. Also a wind power generator with a propeller on the shaft of this permanent magnet generator.

Abstract: A commutator has a plurality of commutator segments fixed to an insulating support member. The commutator segments are formed by cold or hot forming a copper billet cut from a length of copper wire. Each billet has a volume approximately equal to the volume of one commutator segment. Each commutator segment has a main body and an anchor integrally formed with the main body. The commutator segments are spaced about a circle and then an insulating support member is molded to the commutator segments to fix the commutator segments to the support member.

Abstract: The printed-circuit board according to the present invention includes a base member, and a clad metal part that is bonded to one side of the base member, wherein the clad metal part is etched to have an electrical pattern. The vibration motor according to the present invention includes a rotor that includes a printed-circuit board formed with a clad metal part etched to have an electrical pattern, and a stator that includes a brush contacting the clad metal part.

Abstract: A commutation system for a DC motor having a stator including a plurality of windings and a permanent magnet assembly, the assembly comprising: a housing; at least three collector segments connected to stator windings inside the housing; and a rotor assembly in the housing having brushes for connecting the collector segments, the brushes extending from the rotors parallel to the motor axis; wherein the brushes are attached to the rotors to rotate coaxially to each other and contact the surfaces of the collector segments. The system includes proper mechanism for heat conduction from the brushes sliding surface to the external wall. Damping is provided to limit resonance in the commutation system. Also air filtering can be provided to insure clean operation.

Abstract: An electrohydraulic aggregate for converting electric energy into mechanical energy, comprising an electric motor with a stator and with a rotor, comprising magnets or electric windings that produce electromagnetic fields, at least one connecting component for connecting the windings to at least one energy supply, with the connecting component extending through at least one through-hole, the through-hole is provided in an accommodating member accommodating electrohydraulic valves as well as at least one piston pump for the energy supply of a slip-controlled brake system, the piston pump being connected to the electric motor by a gear, and a rotor mounting support comprising at least two spaced rotor bearings, of which at least one so-called A-bearing supports a shaft in the accommodating member, and a so-called B-bearing that is supported in a pot-shaped motor housing.

Abstract: A contact system for energizing an electromagnetic engine includes a fixed first contact set connected to an electrical power source and having an axial face and a first electrical connector disposed on at least a portion of the axial face. The contact system includes a rotatable second contact set having an axial face adjacent the axial face of the first contact set and a plurality of spaced apart second electrical connectors extending along the axial face. The second electrical connectors are connected to a set of electromagnetic coils and energize a predetermined number of the electromagnetic coils when the second electrical connectors engage with the first electrical connector during rotation of the second contact set. The present invention also provides an electromagnetic engine having a housing, a first contact set, a controller, and stator ring and rotor assemblies that produce an electromotive force to spin a shaft of the engine.

Abstract: A direct current motor including a rotor, a stator, a brush holder, and a brush. The rotor includes a core, a plurality of commutator segments, and a plurality of segment coils. The core has a plurality of teeth arranged along a circumferential direction of the rotor. A slot is formed between adjacent ones of the teeth in the circumferential direction. The plurality of commutator segments are arranged along the circumferential direction of the rotor inward from the plurality of teeth in the radial direction of the rotor. Each segment coil includes a plurality of segment conductors electrically connected to each other. The plurality of segment conductors in each segment coil extends through the slots along the axial direction of the rotor.

Abstract: The present invention relates to a fixing structure for printed circuit board (PCB) of micro motor, including a base and a PCB. The base has a shaft tube disposed centrally therein; at least a circuit board fixing pin is protruded beyond the base peripheral to the shaft tube; the PCB has a center hole for the shaft tube to be inserted in, and the diameter of the center hole shall be close to but not less than the outer diameter of the shaft tube; each circuit board fixing pin corresponds to a through hole disposed on the center of the PCB. Sensing plates are prevented from dropping to secure the motor to stably rotate; the circuit board fixing pin, after passing through the through hole, is fixed by an adhesive or a soldering means to make the PCB and the base perfectly fit and free from warp and vibration.

Abstract: A fuel pump includes a pump portion for pumping fuel. The fuel pump further includes a magnet having magnetic poles circumferentially alternate with each other. The fuel pump further includes an armature on a radially inside of the magnet. The armature includes a rotor core provided with a coil formed of a wire. The armature is rotatable for driving the pump portion. A commutator, which is in a substantially disc shape, is provided to an axial end of the armature for rectifying electricity supplying to the coil. The rotor core has an axial end having an outer circumferential periphery defining a commutator-side collar portion extending toward the commutator. The coil is formed by winding the wire between an outer circumferential periphery of the commutator and the commutator-side collar portion.

Abstract: A rotating electromagnetic apparatus has a stator frame supporting spaced apart pairs of permanent magnets which are arranged with like magnetic poles mutually facing. A toroidally shaped rotor frame is radially wound with a plurality of wire coils immersed within slots in the in rotor frame, the slots positioned adjacent to the opposing magnets. An electromechanical commutator is used to direct current between an outside source or sink through brushes to rotating multiple contacts simultaneously. The brushes are triangular in cross section. The coils may be connected in series or parallel interconnection.

Abstract: 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 perpendicular to the thickness direction. A feeding brush is brought into slidable contact with the slidable contact surface. A tabular short-circuit unit short-circuits the segments to be set to the same electric potential with each other. The short-circuit unit is arranged parallel to the slidable contact surface. Accordingly, it is possible to enlarge a cross-sectional area which is perpendicular to a current passing direction of the coupling portion while suppressing an enlargement of a dimension in the axial direction of the commutator.

Abstract: An electrical generator includes a rotary disk that is made of plastic injection molding in which a plurality of coils each having an exposed contact is embedded. Two stationary disks are arranged on opposite sides of the rotary disk and each has an inside surface that opposes the rotary disk and carries two semi-circular magnets. The rotary disk is fixed to a shaft having opposite ends fit into bearings that are received in central bores defined in the stationary disks. The coils are each formed by winding a wire in at least one turn in the form of a circle or an ellipse, the turns being coincident with each other or partially offset with respect to each other. Or alternatively, the coils are formed concentric with respect to each other and the rotary disk.

Abstract: In a direct current electric motor, segment pieces of a commutator are generally planar and are arranged one after another in a circumferential direction about a rotational axis of the commutator. A slidably engaging surface of each segment piece, which is slidably engageable with a plurality of brushes of the motor, extends in a plane that is generally perpendicular to the rotational axis, and each segment piece includes a radially inner engaging portion at a radially inner end part of the segment piece. Each conductive line extends along a corresponding straight line and electrically interconnects between the radially inner engaging portions of corresponding two of the plurality of segment pieces to implement the same electric potential in the corresponding two of the plurality of segment pieces.

Abstract: A commutator having a plurality of segments, a short-circuit member assembly, a holding portion, and a plurality of spacing members is disclosed. The short-circuit member assembly includes a plurality of short-circuit pieces. Each short-circuit piece has an outer terminal, an inner terminal arranged radially inward from the outer terminal and circumferentially offset from the outer terminal at a predetermined offset angle, and a connecting portion connecting the inner terminal to the outer terminal. The holding portion covers the segments and at least a portion of the short-circuit member assembly to hold the segments and the short-circuit member assembly. The spacing members each have an insulated support portion and a plurality of insulated spacing projections formed integrally with the support portion. Each support portion extends in a radial direction of the short-circuit member assembly.

Abstract: 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 has a plurality of protrusions extending in parallel to each other in a direction of rotation of the commutator. Each of the brushes has formed in the bottom thereof grooves in which the protrusions of the commutator are fit. The brushes are urged into constant engagement of the grooves with the protrusions on the commutator to establish electrical contacts between the brushes and the commutator and minimize movement of the armature shaft relative to the bearing.

Abstract: The present invention relates to an apparatus that controllably allows the relative rotation between structures, such as a gimbal and a structure to which it is mounted. According to one aspect, the apparatus includes a twist capsule assembly with internal stop mechanisms that controllably prevents the amount of clockwise and counterclockwise rotation with respect to a rotation axis. According to another aspect of the invention, by limiting the amount of relative rotation, other means of communicating power and signals between the structures can be used, thus avoiding or reducing the limitations imposed by conventional slip ring assemblies. According to yet another aspect, the invention includes techniques and structures for allowing conventionally shielded cables and wires to be used in place of slip rings, while allowing for rotation between structures, thus even further improving the communication of power and signals between structures.

Abstract: A motor has a field body having a number of field poles and an armature body having a number of coils which is placed outside of the above described field body in the radial direction. A commutator secured to the armature body has a number of segments to which the coils are respectively connected. The motor has a power supplying part for supplying a current to the coils and a brush holder which is secured to the field body. The brush holder contains an anode side brush device which makes contact with and slides against the commutator and the power supplying part and a cathode side brush device which makes contact with and slides against the commutator and the power supplying part. Accordingly, the efficiency of use of the coils can be increased.

Abstract: A commutator 10 comprises an electrically non-conductive base 12; and a plurality of electrically conducting segments 16 supported by the base 12. Each segment 16 comprising a first electrically conductive inner layer 18 provided on the base 12, and a second electrically conductive outer layer 20 fixed to the inner layer 18. The inner and outer layers 18, 20 have opposing surfaces 21, 22 which abut each other, once the commutator is assembled. An opening, preferably being a recess 30, for receiving flux and/or air during the fixing of the outer layer to the inner layer is provided in at least one of the opposing surfaces 21, 22. There is also provided a DC electric motor which includes such a commutator 10.

Abstract: The invention relates to a flat commutator (101) comprising a support body (102) that consists of an electrically insulating material, a large number of connecting segments (108) consisting of an electrically conductive material for connecting at least one respective end of a coil winding and a large number of bearing surface segments (112), which form a bearing surface (14) of the flat commutator (101), said bearing surface segments (112) being connected to the connecting segments (108) in a mechanically permanent, electrically conductive manner and the support body (102) and/or the connecting segments (108) being configured in one piece. The support body (102) is pre-fabricated and comprises openings (118), into which the connecting segments (108) are inserted.

Abstract: A commutator comprises a commutator base of insulating material, a plurality of commutator terminals, each of which has a terminal portion and a contact portion, and a plurality of carbon segments formed on the base and over the contact portions, respectively, of the terminal. Each carbon segment has an inner portion of molded (unsintered) graphite material adjacent to the base and one or more outer exposed portions, containing or formed of sintered graphite.

Abstract: A commutator having a plurality of segments, a short-circuit member assembly, a holding portion, and a plurality of spacing members is disclosed. The short-circuit member assembly includes a plurality of short-circuit pieces. Each short-circuit piece has an outer terminal, an inner terminal arranged radially inward from the outer terminal and circumferentially offset from the outer terminal at a predetermined offset angle, and a connecting portion connecting the inner terminal to the outer terminal. The holding portion covers the segments and at least a portion of the short-circuit member assembly to hold the segments and the short-circuit member assembly. The spacing members each have an insulated support portion and a plurality of insulated spacing projections formed integrally with the support portion. Each support portion extends in a radial direction of the short-circuit member assembly.

Abstract: 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 sections of a plurality of coils (8), thereby particularly reducing erosion of the carbon brushes (11).

Abstract: A direct current motor including a rotor having a rotation shaft and rotor coils, a stator configured to apply a magnetic field to the rotor via magnetic poles of the stator opposing magnetic poles of the rotor, an electrical parts mounting base board fixed on the rotation shaft such that the rotation shaft perpendicularly intersects the electrical parts mounting base board, and a commutator having a contact electrode part formed with a plane conductive layer pattern and connected to the rotor coils. The contact electrode part is formed on the electrical parts mounting base board. The direct current motor further includes a pair of electrode brushes in sliding contact with the contact electrode part of the commutator and configured to supply electric power to the rotor coils though the commutator.

Abstract: A fuel pump includes a pump portion for pumping fuel. The fuel pump further includes a magnet having magnetic poles circumferentially alternate with each other. The fuel pump further includes an armature on a radially inside of the magnet. The armature includes a rotor core provided with a coil formed of a wire. The armature is rotatable for driving the pump portion. A commutator, which is in a substantially disc shape, is provided to an axial end of the armature for rectifying electricity supplying to the coil. The rotor core has an axial end having an outer circumferential periphery defining a commutator-side collar portion extending toward the commutator. The coil is formed by winding the wire between an outer circumferential periphery of the commutator and the commutator-side collar portion.

Abstract: A contact element holder, in particular a brush holder for commutator or wiper ring machines, has a carrier that can be secured to the machine housing and at least one quiver, held on the carrier and pointing toward the rotor, for displaceably receiving a contact element, and also has decoupling elements which are disposed between the carrier and the quiver. To achieve good noise decoupling of the contact element from the machine housing and, in use in a commutator machine, for assuring good commutation quality, the decoupling elements are embodied and disposed such that the at least one quiver is capable of executing only a limited rotational pivoting distance about the rotor.

Abstract: An armature for an electromotive device having a unitary coil and armature is disclosed. The armature may include a coil having inner and outer wave winding portions separated by an insulator, each of the wave winding portions comprising a plurality of sheet metal conductors, and a commutator having a plurality of sheet metal commutator segments each being integrally formed with one of the conductors. The armature may be fabricated from a pair of conductive sheets by forming in each of the conductive sheets a plurality of conductive bands each having first and second conductor portions, shaping the conductive sheets into inner and outer cylinders, positioning the inner cylindrical conductive sheet inside the outer cylindrical conductive sheet, forming a coil from the first conductor portions of the inner and outer cylindrical conductive sheets, and forming a commutator from the second conductor portions of the inner and outer cylindrical conductive sheets.

Abstract: A fuel pump having a pumping impeller and an electric motor integrally contained in a cylindrical housing is submerged in a fuel tank of an automotive vehicle. The fuel pump pumps up fuel in the fuel tank and supplies pressurized fuel to an internal combustion engine. To make the fuel pump compact in size, i.e., small in diameter and short in length, a power-receiving connector of the fuel pump is coupled to a power-supplying connector by facing both connectors in the circumferential direction around the axis of the fuel pump. Elongate terminals in the power-receiving connector and brushes are positioned to overlap each other in the rotational direction of the fuel pump.