Abstract: A curvilinear brush retainer and brushes for an electric motor assembly provides an end plate upon which is disposed a pair of curvilinear brush retainers. The brush retainers are configured to retain and support a pair of curvilinear brushes as they are biased against the commutator of the electric motor along a curvilinear path. Brush liners are disposed within the curvilinear path maintained by the brush retainers, serving to reduce the stiction or frictional force imparted to the brushes as they move, thereby reducing the temperature of the brush and extending their operating life.

Abstract: Brush spring assemblies for heavy-duty use are addressed. Such assemblies may include constant-force springs used to bias carbon brushes into contact with commutator surfaces. They additionally may include temporary capture mechanisms for the springs, allowing the springs to be retracted—and retained in a retracted position—while brackets containing the springs are inserted into brush holders. Post insertion, the capture mechanisms may be manipulated so as to release the springs, permitting the springs thereafter to bias brushes toward the commutator surfaces.

Abstract: A brush bag, a brush and a current transfer unit for a dynamo-electric machine comprising a commutator, in particular for an electromotor. The current transfer unit comprises at least the brush, which is embodied, in particular, as a multi-layer carbon brush, and a brush bag. The brush bag is configured in such a manner that the distance between the brush and the brush bag in a front guiding area is smaller than the distance in a rear guiding area. Beating of the brush on the brush bag is visibly reduced due to the configuration thereof and noise caused by the beat is avoided.

Abstract: A brush apparatus includes a brush and a brush holder. The brush includes a pigtail embedded in a wider side thereof so that the longitudinal side in cross-section of the pigtail extends in parallel with a surface of the brush coming into contact with a commutator. The brush holder includes a brush holding member, a brush spring for pressing the brush against the commutator for sliding contact, a base for holding the brush holding member and electrically connecting the same to an earth circuit, and a connection lug on the base. The brush holding member is formed with a notch on a wider side from an upper end thereof for allowing a downward movement of the pigtail when the brush wears and hence is pressed downward. A distal end of the pigtail is connected to the connection lug.

Abstract: The invention provides means of limiting maximum current conducted through windings of an electric machine having a rotor and a stator. By encouraging an appropriate leakage flux around a winding, a leak impedance can be achieved which may be used, according to the invention, to limit the maximum current in the winding as a matter of machine design.

Abstract: The present invention is used with a stopper mechanism for mechanically stopping the rotation of a motor. A pair of brushes is disposed such that a line which passes through the center of a rotor and connects the centers of the paired brushes is offset by a predetermined angle from a line which connects the centers of paired magnets. A commutator is disposed in such a manner as to be offset from a reference position by the same angle as the predetermined angle by which the paired brushes are offset. The predetermined angle falls within a range between an angle obtained by dividing 70° by the number of pairs of stator poles and an angle obtained by dividing 290° by the number of pairs of stator poles. Specifically, in the case of two stator poles, the predetermined angle falls within a range of 70° to 290° inclusive. In the case of four stator poles, the predetermined angle falls within a range of 35° to 145° inclusive.

Abstract: An electric motor assembly device includes a carrier member with a central passage that receives a rotor shaft with a commutator. Brushes secured onto flexible, brush holders urge the brushes towards the central passage into a contact position with the commutator. The carrier member has mechanical elements for restraining the brush holders in an assembly position for assembly where the brushes clear the central passage and are protected against impact by the carrier member. This arrangement allows the rotor shaft to be introduced into the central passage of the carrier member without a risk of damaging the brushes. The brush holders are easily released automatically from the mechanical elements on the electric motor assembly device to bring the brushes into the contact position.

Abstract: An electric motor fixedly axially securable in a housing includes a brush plate with a plurality of axially projecting, uniformly circumferentially distributed, convexly shaped, locking segments formed on the brush plate. The brush plate and the locking segments may be formed of an injection-moldable plastic material. The locking segments may be spherically shaped, and the there may be four locking segments. The brush plate may include a plurality of radial, circumferentially distributed, stop surfaces with which are associated a corresponding plurality of radially inwardly projecting radial guides in the housing.

Abstract: An electric motor, in particular a motor and gear box unit for activating functional equipment in a vehicle, includes a rotor shaft (1) carrying a commutator (2) co-operating with conductive brushes (3) disposed in brush supports (4) fixed to a printed circuit card (5); the motor is provided with means for enabling brush supports to be fixed to the printed circuit card solely by surface mounting. These means may comprise, for each brush (3), a metal casing (6) containing the brush and having one wall (6) with at least one transverse tab (11) adapted to pass through the printed circuit card in order to position and hold the casing on the card and in order to provide an electrical connection. The invention enables brush-support devices to be fixed to the printed circuit card solely by surface mounting, thus making it pointless to perform an additional flow soldering operation as is required in the prior art.

Abstract: An electric motor 10 has a stator 14; a wound rotor 20, including a commutator 28; and brush gear for connecting the commutator to a source of electrical power. The brush gear has at least two cage brush assemblies 34. Each cage brush assembly 34 having a brush 40 for making sliding electrical contact with the commutator of the motor; a cage 50 for guiding the brush 40 along a path towards the commutator; and a spring 70 for resiliently urging the brush 40 along the path through the cage 50. The spring 70 is a constant force spring having two coiled end portions which engage the cage 50 at a commutator end portion. The cage 50 has two fingers about which the coiled end portions of the spring 70 locate.

Abstract: An A-phase brushless motor, where A is an integer greater than or equal to 2, includes a stator and a rotor. The stator has q stator poles, where q is an integer greater than or equal to A. The stator poles form S stator pole sets each consisting of A stator poles each of which corresponds to one of A phases, where S is an integer equal to (q/A). The rotor has p rotor poles, where p is an integer greater than or equal to 2, and is so arranged that the rotor poles face the stator poles. Further, in the brushless motor, p?q, and the stator poles are arranged in a circumferential direction of the motor such that a difference in electrical angular position between any adjacent two of the A stator poles in each of the S stator pole sets is equal to (360°/A).

Abstract: Devices and methods of use for brush holder assemblies are disclosed. Brush holder assemblies including a mounting block and a brush holder are disclosed. Also illustrated is a brush holder assembly including a first portion in sliding engagement with a second portion. In some embodiments the brush holder includes a channel, such that at least a portion of the mounting block is disposed within the channel of the brush holder.

Abstract: Each brush box, which receives a corresponding brush, has a contact wall. The contact wall becomes deformable when the temperature of the contact wall reaches a predetermined temperature. A radially outer end surface of the brush is tilted relative to the contact wall, so that the brush is urged against the contact wall by a compression coil spring, which urges the brush against a commutator of an armature. Upon energization of the armature, when the temperature of the brush reaches a predetermined temperature, an urging force of the spring, which is conducted to the contact wall through the brush, causes deformation of the contact wall to disengage a radially inner end of the brush from the commutator.

Abstract: A miniature motor 1 includes: a motor case 2; a gear case 5 connected to the motor case 2, for pivotally supporting an output shaft 15; a brush holder 30, 30? for holding a brush 17 and attached to the gear case 5; and a brush holder attaching portion 7, 7?, which is formed into a recess-shape, into which the brush holder is press-fitted in the axial direction of the output shaft, the brush holder attaching portion being formed integrally with the gear case.

Abstract: A brush mounting plate for a universal motor includes U-shaped brush guiding plates (4) for radially guiding carbon brushes (3) and having radially offset guiding plate feet (5) which extend through associated mounting holes (6) formed in the brush mounting plate (1), with at least two guiding plate feet (5) being spaced at different distances from respective adjacent end surfaces (11a, 11b) of an associated brush guiding plate (4).

Abstract: Disclosed herein is an apparatus that relates to a dynamoelectric machine brush holder assembly. The apparatus includes, a plurality of brushes, a plurality of brush holders each having a cavity receptive of one of the plurality of brushes and having two protrusions extending in opposite directions along a surface of the brush holder. A base plate with a surface and a plurality of pairs of tangs radially inwardly open radially outwardly closed and each receptive of one of the protrusions of the brush holders.

Abstract: The present invention relates to a sliding-contact holder (8) for an electric motor, which has a cylindrical motor housing (1), a front housing cover (2), a rear housing base (3), a rotor shaft (4), a rotor (5), a commutator (6), a stator (7) and a sliding-contact holder (8). The sliding-contact holder (8) comprises at least two holder elements, which each bear at least one sliding contact (11). The two holder elements are inserted individually into the cylindrical motor housing (1). Owing to its design, the sliding-contact holder (8) saves on space and can easily be inserted into the motor housing (1).

Abstract: A brush device for an electric machine having at least one brush and at least one element such as a helical, scroll, or plunger spring for pressing each brush against a rotating contact element, for example a commutator. In at least one further element for example a spring tab, counteracts a lifting of each brush away from the contact element. To this end, the spring tab is inclined at an angle, as a result of which it exerts a weaker action when the brush moves in the direction toward the contact element than it does counter to this direction. As a result, the brush can be repositioned, but is prevented from lifting away from the contact element. This also reduces the danger of vibrations.

Abstract: Devices and methods of use for brush holder assemblies are disclosed. Brush holder assemblies including a mounting block and a brush holder are disclosed. Also illustrated is a brush holder assembly including a first portion in sliding engagement with a second portion. In some embodiments the brush holder includes a channel, such that at least a portion of the mounting block is disposed within the channel of the brush holder.

Abstract: An electric motor includes a rotation shaft, a commutator fixed to the rotation shaft, an armature provided with armature coils electrically connected to the commutator, the armature rotatably housed in a motor housing, a brush slidably contacting with the commutator, a power feeding terminal including a positive electrode plate and a negative electrode plate, and supplying electric power supplied from a power source to the brush and an electric noise reduction device provided between the positive electrode plate and the negative electrode plate of the power feeding terminal.

Abstract: Terminal plates are located in a brush holder base, a spring and a brush are located in the brush holder base, and the terminal plates are connected to pigtails in an area within 90° in a backside of an introducing portion of the pigtails in the brush, whereby operating noise and ripples of torque of a dynamo-electric machine are reduced.

Abstract: 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 a commutator is to be rotated and extend over a whole of a circumference of the commutator surface. Each of the protrusions is defined by two side walls arrayed adjacent each other. At least one of the two side walls of each of the protrusions is oriented to be inclined at a preselected angle to the orientation of the spring pressure. The preselected angle lies within a range of 20° to 70°. This ensures the stability of the abutment of the brush with the commutator surface, thus enhancing the startability of the dc motor.

Abstract: A rotating electric machine includes an end bracket; a commutator; a brush holder stay with a first end surface and a second end surface, wherein the first end surface is covered by the end bracket; a brush holder provided at the second end surface of the brush holder stay; a brush that is equipped in the brush holder and slidably contacts with the commutator; and a heat transfer medium for transferring heat of the brush is provided between the end bracket and the brush holder stay.

Abstract: A sliding contact assembly comprises: at least one contact slide track; a brush holder for holding at least one brush contact member and maintaining the at least one brush contact member in sliding contact with the at least one contact slide track during relative movement between the brush contact member and the contact slide track; and a collecting container disposed to collect particles of abraded material from the at least one brush contact member; wherein a cover is provided to surround substantially the brush holder and the at least one brush contact member, the cover having walls extending along a direction of the contact slide track laterally of the brush holder and the brush contact member and along a side of the brush holder remote from the contact slide track; the collecting container is disposed at a downstream end of the cover; and the cover is designed to channel a stream of air, generated within the cover by movement of the contact slide track, towards the collecting container.

Abstract: The present invention provides an automotive rotary electric machine enabling brush abrasion limit detection reliability to be increased and stable brush abrasion limit detection indication to be performed. The construction thereof is provided with a detecting terminal for sensing a brush abrasion limit when a brush has abraded to a predetermined length by coming into contact with a coil spring that forces the brush, and a determining circuit constructed so as to compare output from the detecting terminal and a threshold value, to enter an ON state (a brush abrasion limit detection state) once the output exceeds the threshold value, and thereafter to maintain the ON state. Thus, because the ON state of the determining circuit is maintained even if output from the detecting terminal fluctuates due to vibration, noise, etc., false detection of the brush abrasion limit resulting from the fluctuations in the output from the detecting terminal can be prevented.

Abstract: 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 rotary shaft of a rotor. A slant-line mark is drawn on a surface of the brush by paint. The direction of this mark is slanted to, not perpendicular to and not parallel to, the direction of pushing the brush toward the rotary shaft of the rotor. According to the proceeding of wear of the brush, the slant-line mark on the surface of the brush faced and contacted to the slip ring is shifted toward the right direction. An observer observes the position of the slant-line mark and recognizes the proceeding of wear and the optimum time to replace the brush with a new brush.

Abstract: The brush device is provided with a brush, a brush holder, and a biasing member. The brush holder has an insertion hole in which the brush is inserted. The biasing member biases the brush toward the sliding surface. The sliding surface is approximately perpendicular to the rotational axis of the commutator. The brush is inclined such that an end of the brush on a side of the commutator is positioned on a forward side of the other end of the brush with respect to a rotational direction of the commutator. A surface of the brush on the side of the commutator is approximately parallel with the sliding surface.

Abstract: A fuel pump includes a case member, which defines a fuel passage and accommodating a pump portion for pumping fuel. A motor portion is provided in the case member, and including a commutator for rectifying electricity supplied to an armature. Positive and negative electrode terminals conduct electricity to the motor portion. An insulative terminal support member supports the positive and negative electrode terminals. Brushes are slidable on the commutator to conduct electricity from the positive and negative electrode terminals to the commutator. Brush springs apply resilient forces to bias the brushes against the commutator. The terminal support member has a load bearing portion abutting against the brush springs to receive reactive forces of the resilient forces.

Abstract: A vehicle alternator is disclosed as including a stator having a stator winding, a rotor, having a field winding and rotatably disposed in the stator, which is mounted on a rotary shaft formed with slip rings electrically connected to the field winding, and a brush device including a brush holder having one end formed with an opening portion through which brushes extend toward the slip rings to be held in sliding contact with the slip rings. The brush holder has a discharge port through which foreign matters are expelled. Brush wear particles, resulting from sliding contact between the brushes and the slip rings during operation of the vehicle alternator, pass through clearances between sidewalls of the brush holder and the brushes to the discharge port, through which the brush wear particles are discharged to the outside with no accumulation in the brush holder.

Abstract: According to the present invention, there is provided a rotating electric machine which includes a field, an armature having an armature shaft and a commutator provided on the armature shaft, a brush to slide on the commutator during rotation of the armature, a brush holder holding the brush, and an end frame covering an end of the armature shaft, wherein the brush holder is directly fixed to the end frame. With such an arrangement, heat generated by the brush and transferred to the brush holder can be directly transferred from the brush holder to the end frame, thereby being effectively dissipated. Moreover, without any additional member intervening between the brush holder and the end frame, the parts count of the rotating electric machine is reduced, thus increasing the assembly accuracy and decreasing the manufacturing cost of the rotating electric machine.

Abstract: A brush assembly 22 for an electric motor 10 has brush holder 24 supporting a brush 26 and a brush spring. The brush holder 24 has a strip of brass having a central portion and two end portions 28, 40. The central portion has two pins 30 extending in a parallel fashion away from the central portion. A brush 26 has two grooves 64 which mate with and accommodate the pins 30 whereby the pins 30 support the brush 26 and prevent movement of the brush 26 except in the direction along the pins 20. The brush spring is a coil spring mounted on a post 54 formed at one end of the strip by a transverse slot 52 and bears on the back side of the brush 26 to urge it to slide along the pins away from the brush holder 24.

Abstract: A brush holding apparatus is mounted to an inner wall surface of a rear bracket and a cap mounted to a head portion of a brush holder portion is exposed through an opening in the rear bracket. Brushes are housed inside brush insertion apertures of the brush holder portion and are placed in elastic contact with slip rings by springs. An abrasion detection terminal is insert molded into the brush holder portion, a contact thereof projecting inside one of the brush insertion apertures and coming into contact with the corresponding spring when the brushes are abraded by a predetermined amount.

Abstract: 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 rotary shaft of a rotor. A slant-line mark is drawn on a surface of the brush by paint. The direction of this mark is slanted to, not perpendicular to and not parallel to, the direction of pushing the brush toward the rotary shaft of the rotor. According to the proceeding of wear of the brush, the slant-line mark on the surface of the brush faced and contacted to the slip ring is shifted toward the right direction. An observer observes the position of the slant-line mark and recognizes the proceeding of wear and the optimum time to replace the brush with a new brush.

Abstract: 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 provided with means for enabling brush supports to be fixed to the printed circuit card solely by surface mounting. These means may comprise, for each brush, a metal casing containing the brush and having one wall with at least one transverse tab adapted to pass through the printed circuit card in order to position and hold the casing on the card and in order to provide an electrical connection. The invention enables brush-support devices to be fixed to the printed circuit card solely by surface mounting, thus making it pointless to perform an additional flow soldering operation as is required in the prior art.

Abstract: A dual-nature, uni-constructed device, suitable for conducting electricity between two objects in relative motion, comprises two compatible elements each having a straight section and a sinuous section. The two elements are combined to form a unified whole whereby the two straight sections are mutually servable as a brush component and the two sinuous sections are mutually servable as a spring component. The inventive device is associable with an electrical or electromechanical machine so that, during machine operation, the brush component slidingly contacts a first machine part, the spring component is affixed to a second machine part and exerts a bias against the brush component, and the inventive device conducts electrical current from one machine part to the other machine part. Each element includes an electrically conductive main layer (including one or more wire fabric sheets) and two elastomeric outside layers (on opposite sides of the sinuous section).

Abstract: This invention discloses a DC motor with externally mounted carbon brushes, comprising a front end cover, a housing, magnet, a rotor, a commutator and a back end cover, characterized in that the outer wall of the back end cover is provided with two mounting holes for brush brackets which are mounted with annular brush brackets having identical structures, a radial sliding tube used to mount the carbon brush is located in said brackets, said carbon brush in the sliding tube for carbon brush contacts the commutator by a spring biasing against a brush cap, the outward end thereof being connected to a copper sheet through a brush shunt, said copper sheet is held against the back end of the sliding tube, a lead wire for a power source is lead out from an outlet of another copper sheet at an outer wall of the sliding tube. The electrical connection of the carbon brush is lead out from the sliding tube through the brush shunt and the copper sheet, therefore the electrical connection is reliable.

Abstract: Devices and methods of use for brush holders are disclosed. A brush holder assembly including a brush catch and a brush release is disclosed. Also illustrated is a brush holder assembly including a first portion in sliding engagement with a second portion. Sliding engagement of the first portion with the second portion may selectively engage and/or disengage a brush catch with a brush. In some embodiments the brush catch is disengaged from the brush when the brush holder is in a locked position and is engaged with the brush when the brush holder is in an unlocked position. Methods and devices for selectively placing a brush holder in a locked or unlocked position are also disclosed.

Abstract: 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 plate assembly located between the impeller and the motor assembly, said end plate assembly including a plate portion defining an opening throughwhich the shaft passes, wherein said commutator is located near the opening, and a pair of brush retainers adapted to receive the brushes formed on the plate portion adjacent said commutator, the brush retainers opening toward the fan assembly.

Abstract: Devices and methods of use for brush holders are disclosed. A brush holder assembly including a brush catch and a brush release is disclosed. Also illustrated is a brush holder assembly including a first portion in sliding engagement with a second portion. Sliding engagement of the first portion with the second portion may selectively engage and/or disengage a brush catch with a brush. In some embodiments the brush catch is disengaged from the brush when the brush holder is in a locked position and is engaged with the brush when the brush holder is in an unlocked position. Methods and devices for selectively placing a brush holder in a locked or unlocked position are also disclosed.

Abstract: A brush holding apparatus is mounted to an inner wall surface of a rear bracket and a cap mounted to a head portion of a brush holder portion is exposed through an opening in the rear bracket. Brushes are housed inside brush insertion apertures of the brush holder portion and are placed in elastic contact with slip rings by springs. An abrasion detection terminal is insert molded into the brush holder portion, a contact thereof projecting inside one of the brush insertion apertures and coming into contact with the corresponding spring when the brushes are abraded by a predetermined amount.

Abstract: A brush tube structure 10 is provided for holding a brush 14 of a motor. The brush tube structure includes a base 15 and a plurality of fingers 12 extending from the base in a cantilevered manner and in direction of travel of the brush. The fingers are constructed and arranged to define a brush receiving space, such that when a brush is in the space, the fingers engage the brush.

Abstract: A linear motor includes a row of permanent magnets fixed at a position above a stator, and a plurality of magnetic pole members fixed at a position below a movable member. The row of permanent magnets is formed from N poles and S poles alternately arranged at given intervals. The plurality of magnetic pole members extend toward the row of permanent magnets and in a vertical direction and have the same height. The extremities of the magnetic pole members oppose the row of permanent magnets via an air gap. The magnetic pole members are coated with insulators, and a former-wound coil is fitted around the insulator. The part of the magnetic pole member coated with the insulator, except for the extremity thereof, is made thin by the amount corresponding to the thickness of the insulator.

Abstract: Devices and methods of use for brush holders are disclosed. A brush holder including an over-center locking device is disclosed. Also illustrated are methods and devices for maintaining brush pressure against a moving conductive surface using a spring without a back plate. Methods and devices for routing current from a brush to an output location without conducting through a brush box are shown. A system for ready removal and replacement of brushes, contacts and springs is disclosed. Also included are mechanisms and methods for preventing a brush from falling downward or out during removal of the brush. Methods and devices for cutting off current flow without creating arcing or shorting between a brush and collector ring or other moving conductive surface are presented as well.

Abstract: A brush holding plate includes cartridges and brushes, which are guided into the cartridges. The brushes are guided in a spring-loaded manner in the radial direction towards a central opening in the brush holding plate. The cartridges are arranged on the brush holding plate in such a way that they can be displaced from a radially outer pre-assembly position into a radially inner end assembly position.

Abstract: 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 springs, disposed in a pair of spring holes formed in the cover, and an engaging member for restricting the brushes to move toward the motor section.

Abstract: A carbon brush holder includes a tubular copper conducting receptacle, a lead wire terminal riveted to the outside wall of the copper conducting receptacle, and an electrically insulative hollow holder base holding the copper conducting receptacle, the electrically insulative hollow holder base having an inside locating groove, which receives the bottom end of the lead wire terminal to hold the lead wire terminal in position.

Abstract: The present invention relates to a wear indicator for a motor carbon brush which includes a housing, carbon brushes, an elastic element, a circuit board with an alarm indicator light and an electric probe disposed on the circuit board. The electric probe is connected to the alarm indicator light and the carbon brush has a contact portion on its outer surface which when the brush is worn and need to be changed is electrically connected to the alarm indicator light through the electrical probe to turn the alarm indicator light on. The present invention is simple to manufacture and gives a indication of wear.

Abstract: A brush box assembly for use in an electric motor and an electric motor having a brush biasing mechanism that also retains the brushes to allow installation of a sliding electrical contact assembly is described. The brush box assembly has a plurality of brush holders each with a brush retention slot, a plurality of brushes each adapted to fit in the brush retention slots, the brushes having a contact face and a non-contact face, and a plurality of torsion springs each having a spring loading arm and a spring retention arm, each spring loading arm contacting one brush on the non-contact face and adapted to bias the brush against a sliding electrical contact after installation of the sliding electrical contact assembly, each spring retention arm adapted to contact one brush on the front side and retain the brush in the brush retention slot during installation of the sliding electrical contact assembly. A method of manufacture of a device having brushes with the biasing and retention mechanism is also disclosed.

Abstract: An insulating member for a carbon brush holder includes a main body and a cover member. The main body includes a through hole, which has an internal thread formed around its periphery. The internal thread is provided with a spiral internal thread tooth serially formed thereon. The internal thread tooth has a first internal tooth bevel and a second internal tooth bevel. The first internal tooth bevel has a larger distance between a peak and a bottom of the internal thread tooth than that of the second internal tooth bevel. The second internal tooth bevel has a first convexity abutting the first internal tooth bevel. The cover member has an external thread formed around a periphery thereof for threadedly fitted into the internal thread of the main body. Accordingly, the cover member can be tightly threadedly fitted with the main body.

Abstract: A end cap and brush box assembly for a mechanically commutated electric motor including an end cap constructed from high temperature material which also has resilient mechanical properties. The end cap and brush box assembly includes a two piece brush box having a first lock tab and a second lock tab for securing the two piece brush box to the end cap. The two piece brush box has a brush hood secured to a base plate. The base plate has a shunt welding plate for welding to an electrical shunt of a brush and a connector for connecting to an electrical lead coupled to a power source.