Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7629722 | Electric motor assembly device 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. T... | 12/08/2009 |
| 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 |
| 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 |
| 7256527 | Brush holding device The brush holding device includes a brush holder having a brush-housing chamber, and a holder plate to which the brush holder is attached. The holder plate is formed with a center hole at a center portion thereof, the center hole having a size allowing a commutator ... | 08/14/2007 |
| 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 |
| 7193345 | Collecting and distributing ring for rotary electric machine stator A collection-distribution ring comprises three busbars, each having a circular ring shape, which are integrally connected together with prescribed distances therebetween by an insulating resin. Coil connection terminals project inwardly in a radial direction and are... | 03/20/2007 |
| 7173359 | Brush holder assembly for an electric motor A universal motor has a brush cage assembly in which a U-shaped clip 34 is located about a wall of a through hole 28 of a bearing bracket 24 for receiving a brush cage 30. The clip 34 has an outer limb 42 with inwardly and r... | 02/06/2007 |
| 7161272 | Welding wire feeder and motor therefor A wire feeder for an electric arc welder comprising a set of feed rolls driven by a DC motor with a commutator, first and second opposite polarity leads receiving power to drive the motor, and having a first brush at a given position on the commutator and connected ... | 01/09/2007 |
| 7114797 | Actuator device, liquid ejection head, and method of inspecting the same A substrate is formed with a pressure generating chamber. A vibration plate is joined to the substrate so as to form a part of the pressure generating chamber. A first piezoelectric element is disposed on a part of the vibration plate facing the pressure generating ... | 10/03/2006 |
| 7105983 | 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... | 09/12/2006 |
| 7034430 | Brush holder apparatus, brush assembly, and method 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... | 04/25/2006 |
| 7034431 | Brush holding plate for an electric motor, corresponding electric motor and assembly method 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 holdi... | 04/25/2006 |
| 6927523 | Brush device and motor with brush The present invention aims at making a motor with a brush in the direction of its motor shaft small by providing a thin brush device and at preventing deterioration of functions thereof. A guide portion is provided at a brush base portion and a recess portion is pro... | 08/09/2005 |
| 6927510 | Cooling electromagnetic stirrers Cooling of the electrical coils of an electromagnetic stirrer is effected using a ferrofluid. ... | 08/09/2005 |
| 6924578 | Electric motor An electric motor provided with a terminal insertion hole to which a terminal connected to a brush is inserted, in a feed connector, a fitting hole is formed in a base end portion of the terminal, a projection is formed in a side of a brush holder, and the fitting h... | 08/02/2005 |
| 6864615 | Electric machine with brush-holder assembly and method for assembling an electric machine provided with such an assembly The electric machine includes a collector (60), a brush-holder assembly comprising an end cap (26) and a set of members (28, 30, 32, 34) for electrical connection equipped with guide cages (36, 38, 40, 42) suitable for accommodating a res... | 03/08/2005 |
| 6856062 | Homopolar machine with shaft axial thrust compensation for reduced thrust bearing wear and noise A homopolar machine produces an axial counter force on the rotating shaft to compensate for the load on the shaft's thrust bearing to reduce wear and noise and prolong bearing life. The counter force is produced through magnetic interaction between the shaft and the... | 02/15/2005 |
| 6838803 | System for detecting abrasion of brush of direct current motor A motor vehicle has road wheels driven by a direct current motor that has a brush installed therein. A system for detecting abrasion of the brush comprises a clutch arranged between the road wheel and the direct current motor. The clutch is of a wet type so that in ... | 01/04/2005 |
| 6812605 | Self-retained RFI suppression choke for electric motor A choke 20 is provided for suppressing radio-frequency interference of a brush-type motor. The choke includes a single wire having a portion wound about a coil axis A to define a plurality of coils 24 including two outermost coils 26 and 28. ... | 11/02/2004 |
| 6794787 | Bypass motor fan assembly having an integral brush clamp and vent cover retention clip and method for assembling the same A bypass motor fan assembly having an integral vent cover retention clip includes a motor assembly having a motor bracket which carries at least a pair of motor brushes. A vent cover is coupled to the motor assembly and is retained by the clip. The integral clip is ... | 09/21/2004 |
| 6724122 | Cover plate for an electric motor and an electric motor A cover plate for an electric motor which has a brush array and interference suppression devices has additional electronic components mounted directly on the cover to determine the speed of the electric motor and for diagnosis. Contact with the interference suppress... | 04/20/2004 |
| 6707220 | Electric motor brush holder for suppressing audible and electromagnetic noise A brush holder 10 is provided for holding a hammer brush 12 of an electric motor. The brush holder includes a single piece of wire bent to define a brush-engaging portion 14 define an opening 15, and a torsion spring structure 16 c... | 03/16/2004 |
| 6664697 | Electrical slip ring apparatus having multiple spaced apart support structures The present invention is directed to an electrical slip ring assembly having a plurality of conductive rings held in place by multiple spaced apart comb-like structures advantageously eliminates the need for molding the conductive rings as part of the bas... | 12/16/2003 |
| 6630765 | Coil lead and terminal securement caps for securing wires of a rotor An electric machine having a rotor carrying a field coil has a fan and slip ring assembly. The slip ring assembly is axially remote from the fan portion, the slip ring assembly being electrically connected to the field coil. The point of connection betwee... | 10/07/2003 |
| 6628033 | Reduction of induced magnetic forces on current collectors in homopolar machines having high magnetic fields A homopolar machine produces an axial counterforce on the rotating shaft to compensate for the load on the shaft's thrust bearing to reduce wear and noise and prolong bearing life. The counterforce is produced through magnetic interaction between the shaf... | 09/30/2003 |
| 6624546 | Radio-frequency interference suppressing choke with elongated portions for brush-type motors A choke 10, for suppressing radio-frequency interference of a brush-type motor, includes a single wire having a portion 15 wound about a coil axis A to define a plurality of coils 14 including two outermost coils 16 and 18. An attaching structure 20 exten... | 09/23/2003 |
| 6617744 | DC motor brush card assembly having attaching structures and multiple choke coils with elongated portions A choke 10, for suppressing radio-frequency interference of a brush-type motor, includes a single wire having a portion 15 wound about a coil axis A to define a plurality of coils 14 including two outermost coils 16 and 18. An attaching structure 20 exten... | 09/09/2003 |
| 6552464 | Totally integrated engine cooling module for DC motors An engine cooling module includes a shroud structure 12. A housing 20 of a d.c. electric motor is formed integrally with the shroud structure 12. The housing has an open end 21. The motor has a drive shaft 26. A heat sink 22 is disposed opposite the open ... | 04/22/2003 |
| 6528921 | Power tools having separable brush holder segments A power tool has a motor housing that comprises housing halves arranged in the circumferential direction of a motor. A brush holder is disposed within the motor housing and serves to support brushes. The brush holder comprises holder halves that are arran... | 03/04/2003 |
| 6518686 | Electric motor including unitary brush card bushing holder A vehicle blower motor includes a housing having a first bushing mounted at a first end about a shaft extending through the housing. A one-piece brush card bushing holder is mounted in the second end of the housing and carries a plurality of brushes engag... | 02/11/2003 |
| 6515399 | Electric motor-and-gear assembly for vehicle accessories An electric motor-and-gear assembly for driving vehicle aggregates such as windshield and rear window wipers, power-window units and the like, having a transmission housing that can be closed by a housing cover. A motor housing that contains a commutator ... | 02/04/2003 |
| 6472791 | Envelope for slip-ring contacting members in high-power rotary current collector system An electrical current collector system (20) comprises a rotatable shaft (28) having at least one and preferably plural electrically conductive slip rings (27) mounted thereon. For each phase, a slip ring is paired with a fixed conducting ring assembly (44... | 10/29/2002 |
| 6452295 | Engine starter with a thermostat for thermal protection A starter comprises a thermostat for detecting increases in the temperature of brushes and interrupting the energizing of the starter, and a heat conducting member secured to the thermostat for conducting the heat of one of the brushes, the heat conductin... | 09/17/2002 |
| 6452297 | Motor device having commutator and brush outside yoke A motor device comprises a motor unit and a reduction unit. The motor unit comprises a yoke which is formed in a generally bottomed cylindrical shape, and a rotor having an armature and a rotary shaft. The reduction unit comprises a gear housing accommoda... | 09/17/2002 |
| 6198192 | Brush-holding device The invention relates to a brush-holding device for electric motors comprising carbon brushes, a conductive stamped grid as a printed circuit board, a base to which the printed circuit board is attached and components for monitoring temperature or for rad... | 03/06/2001 |
| 6144134 | Structure hidden mount for electric motor carbon brushes A structure for mounting a brush on an electric motor, including a mounting bracket having an opening at one end for allowing the brush to slide out of the mounting bracket and abut a moving conductor, a slot formed in a side wall of the mounting bracket ... | 11/07/2000 |
| 6127752 | Motor with RPM pickup via a hall sensor The invention is based on an electrically operated motor, having a shaft with a magnet rotor body, the RPM of the shaft can be picked up by a Hall sensor disposed on a circuit board. The circuit board is embodied with soldered pins or contact shoes and is... | 10/03/2000 |
| 6100617 | Electrical insulation barrier for an electric motor An electric motor assembly includes an electric barrier member positioned between the electric brushes and the bearing. The electric barrier member preferably is a generally annular disk made from a high-temperature dielectric material. The non-conductive... | 08/08/2000 |
| 6011342 | Carbon brush for an electric machine A carbon brush for an electric machine, resiliently acting on a collector, is arranged within a guideway so as to be movable radially to the collector and is inflexibly connected with a bending leg. The carbon brush allows easy and cost-saving assembly in... | 01/04/2000 |
| 5990594 | Brush retaining clip and electrical connection A combined commutator brush retainer clip and electrical connector includes a main body portion and a terminal portion. The main body portion has a recessed portion with a plurality of dimples therein. A commutator brush is electrically connected to a bru... | 11/23/1999 |
