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| Number | Title | Issue Date |
| 8004143 | Carbon brush of motor and method for producing the same An electric motor that includes a rotor; a coil that is wound around the rotor; and a carbon brush that supplies power to the coil, wherein the brush is formed by using a raw material in which artificial graphite whose crystallites are flaky in shape is mixed with n... | 08/23/2011 |
| 7525232 | Sliding electrical contact part A sliding electrical contact part is disclosed. The contact part includes a base of carbonaceous material and copper. The contact part is lead-free and contains zinc and iron-base particles having a size less than 500 μm. The contact part is particularly suitable f... | 04/28/2009 |
| 7498712 | Grain orientation control through hot pressing techniques Systems and methods for electrical component, e.g., brush, manufacture are provided that control grain orientation. The systems and methods utilize hot pressing techniques to enhance the properties and functionalities of the electrical components/brushes. An interme... | 03/03/2009 |
| 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 |
| 7294166 | Metal-graphite brush A brush body 4 of a metal-graphite brush 2 is composed of a commutator side portion 6 which contains graphite, copper and a metal sulfide solid lubricant, and a lead side portion 8 which contains graphite and copper but does not contain a... | 11/13/2007 |
| 7180219 | DC motor with externally mounted carbon brush 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 fo... | 02/20/2007 |
| 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 |
| 7129615 | Metal coated carbon brush Disclosed is a metal coated carbon brush having a carbonaceous substrate and a metal coating formed on a surface of the carbonaceous substrate having a mean pore radius of 0.1–2.0 μm and an accumulative pore volume of 50–600 mm3/g. ... | 10/31/2006 |
| 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 |
| 7038351 | Metal-graphite brush and motor including a 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 of, or inside, the sintered material. The metal-graphite brush is infiltrated by a liquid contai... | 05/02/2006 |
| 6949863 | Metal-graphite brush A metal-graphite brush comprises a brush body which is made by mixing and molding metal powder and graphite powder. 2 mg to 30 mg as amounts of phosphate ion of at least one of phosphoric acid and a phosphate compound is added to 1 g of the brush body of the metal-g... | 09/27/2005 |
| 6933651 | Commutating device for small-sized motor and manufacturing method therefor In the present invention, by selecting an optimum combination of plating layer materials or materials, not only the manufacturing cost of motor brush is reduced but also a plating layer having excellent characteristics is formed in a narrow width on the surface of b... | 08/23/2005 |
| 6909219 | Carbon brush for electric machine Molybdenum disulfide, tungsten disulfide or the like as a solid lubricant and any of alumina, silica, silicon carbide or the like as an abrasive are added to filter graphite. A metal of good electric conductor is coated over the whole surface of a carbon brush mater... | 06/21/2005 |
| 6901054 | Method for checking the transfer of data cells in an asynchronous switching arrangement, elementary switching unit and network equipped for such a method For checking transfer of data cells in an asynchronous switching arrangement, cells are cyclically marked and counted before entering and after leaving the arrangement. A periodical time frame composed of N interleaved checking cycles is imposed. Each cycle (... | 05/31/2005 |
| 6876121 | Flat oscillation motor equipped with a brush apparatus An axial direction sliding-contact type brush apparatus is provided which can not only maintain performance of suppressing vibration of a brush of a flat vibrator motor but also allow the brush to form a stable electrical contact with a commutator. The base portion ... | 04/05/2005 |
| 6815862 | Multilayer brush In a multilayer brush composed chiefly of copper and graphite and incorporated therein with a solid lubricant, which consists essentially of two types of brushes, a high-copper-content part brush containing the copper in a large quantity and a low-copper-content par... | 11/09/2004 |
| 6787963 | Brush assembly An brush assembly is provided in which electric power losses in brushes 32 are reduced, thereby suppressing an abnormal or excessive rise in temperature of the brushes. A tip end of a lead wire 33 inserted into a corresponding brush 32 in a dire... | 09/07/2004 |
| 6758881 | Metal-graphite brush and production method thereof Ag particles produced by chemical reduction and having a mean particle size of 5 μm are added by 0.05-3 wt % and Zn are added by 2-10 wt % to a Pb-less brush body containing graphite, Cu and a metal sulfide solid lubricant of a metal-graphite brush. ... | 07/06/2004 |
| 6755882 | Metal-graphite brush A brush body 4 of a metal-graphite brush 2 is composed of a Pb-less commutator side portion 6 which contains graphite, copper and a metal sulfide solid lubricant, and a lead side portion 8 which contains graphite, copper, the metal sulfid... | 06/29/2004 |
| 6700289 | Direct current commutator motor A DC commutator motor that is driven by a direct current power source obtained by rectifying an alternating current power source includes a plus-side brush made of material having a high resistivity and a minus-side brush made of material having a low res... | 03/02/2004 |
| 6548923 | Two-phase hybrid type stepping motor The permeance between the small teeth provided on the stator magnetic pole and the rotor magnetic pole may be varied regularly according to the rotation of the rotor. The small stator teeth provided on the tip end of each stator magnetic pole are divided ... | 04/15/2003 |
| 6514630 | Au-based clad composite material, producing method thereof and micromotor using the same To provide a contact material suitable for a commutator of a micromotor which can improve wear resistance and prolong the life of the micromotor by improving an Au-based clad composite material provided at an outermost layer with Au or an Au alloy. The pr... | 02/04/2003 |
| 6245440 | Continuous metal fiber brushes A conductive fiber brush including a brush stock composed of plural conductive fibers or strands of fibers at least some of which may have plural bends along the leg of the fibers or strands. The fibers may have a diameter less than 0.2 mm and are arrange... | 06/12/2001 |
| 6144129 | Spring mounting for an electric generator A support system for an electric generator having a tapered spring bar connected between the stator core and stator frame, where the spring bar has a continuously tapered cross-sectional area along its length. The tapered cross-section provides a larger c... | 11/07/2000 |
| 6081060 | Motor assembly for power tools A power tool has an electric motor with a stator assembly and an armature rotatable within the stator assembly. A commutator is rotatable with the armature and is connected to the armature via a shaft. The commutator has an outer layer formed from a titan... | 06/27/2000 |
| 5909077 | Brush having inclined grooved contact surface The invention describes a carbon brush for an electrical machine. Carbon brushes of this type need to fulfill two requirements. First, the carbon brush should be as resistant to abrasion as possible. Second, as little noise as possible should be generated... | 06/01/1999 |
| 5808394 | Carbon brush for an electric motor This invention relates to a carbon brush for an electric motor. These carbon brushes are guided in tubular brush holders and are pressed against a commutator. Furthermore, the brushes of the present invention include inclined side edges so that the front ... | 09/15/1998 |
| 5744890 | Brush structure for motor in which wear-related parameters of the brushes are varied to equalize brush wear A brush structure for a motor is provided for realizing an equalization of wear of brushes without causing an early wear of a specific brush while not necessitating a complicated conduction controlling device. A first brush, which is one of four brushes, ... | 04/28/1998 |
| 5701046 | Process for the production of multi-layered brushes and brushes obtained by the process The process comprising the charging into a mould (3) of at least one electrically conductive powder (4), the compression by means of a piston (5) of the contents of the mould to form a crude brush (7), the heat treatment of said crude brush (7) as well as... | 12/23/1997 |
| 5481150 | Brush and commutator motor having brush device using the same A binded carbon brush includes a brush main portion formed mainly of carbon, and an electric conductor formed by a material, such as a copper powder, having an electric resistivity lower than that of the brush main portion and extending along a main curre... | 01/02/1996 |
| 5387832 | Brush and commutator motor having brush device using the same A binded carbon brush includes a brush main portion formed mainly of carbon, and an electric conductor formed by a material, such as a copper powder, having an electric resistivity lower than that of the brush main portion and extending along a main curre... | 02/07/1995 |
| 5365136 | Brush for an electric motor having low sensitivity to vibrations Brush for electric motors obtained by compression of an electrically conductive powder containing one end of an electrical conductor so as simultaneously to allow the formation of the brush and the mechanical fixing of said electrical conductor, and chara... | 11/15/1994 |
| 5227689 | Metal-filled graphite for miniature motors and method of making same A metal-filled gaphite brush used for a miniature motor, which has a permanent magnet field and is caused to rotate through current commutation via a commutator, formed by bonding graphite powder and used for making sliding contact with the commutator for... | 07/13/1993 |
| 5144181 | Carbon brush for miniature motors and method of making same A carbon brush for miniature motors comprising a stator using a permanent magnet as the field, and a rotor on which a rotor winding is wound, and having a commutator for feeding current to the rotor winding and brushes, formed by bonding graphite powder, ... | 09/01/1992 |
| 5136198 | Carbon brush for miniature motors and method of making same A carbon brush used for a miniature motor, which has a permanent magnet field and is caused to rotate through current commutation via a commutator, formed by bonding graphite powder and used for making sliding contact with the commutator for current commu... | 08/04/1992 |
| 4605581 | Method of treating a carbon current collection brush blank and brush resulting therefrom A carbon current collection brush having improved wear characteristics and exhibiting a relatively low coefficient of friction at its sliding contact surface (e.g., with a commutator or slip ring) is made by impregnating a brush blank with a solution cont... | 08/12/1986 |
| 4415635 | Electric brush A multifiber electrical brush formed of an electrically conductive matrix material having plural electrically conducting fiber wires embedded therein and extending therefrom, wherein the fiber wires have a diameter varying from 1 to 120μm, a length on th... | 11/15/1983 |
| 4337407 | Insulated strand brushes A brush having at least a portion thereof adjacent the trailing end made up of a plurality of individually insulated strands of highly conductive material.... | 06/29/1982 |
| 4277708 | Environment and brushes for high-current rotating electrical machinery A high-current electrical machine, comprises a stationary and a moving member and at least one current collector brush disposed between the members and in frictional contact with one member; where the brush comprises a plurality of flexurally independent,... | 07/07/1981 |
| 4131460 | Method of producing a sintered composition A method of producing a sintered composition used as a brush for a dynamo electric machine, includes the steps of compacting a powder from which the brush is to be made around one end of an electrical lead with the remainder of the lead projecting from th... | 12/26/1978 |
