456results about "Brushes manufacture" patented technology

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 length of the fibers or strands. The fibers may have a diameter less than 0.2 mm and are arranged in contacting engagement with each other with the touching points among the fibers or strands maintaining elastic tension between the fibers or strands and thereby maintaining voids between the fibers or strands to produce a packing fraction between 1 and 50% and in extreme cases up to 70% but generally between 10-20% depending on the various factors, including the materials used, the current densities to be conducted, and the sliding speeds under operation. The plural bends are implemented by producing fibers or strands having a regular or irregular spiral, wavy, saw-tooth, triangular, and / or rectangular pattern, or other undulating pattern. Optionally, the voids in brush stock may be partially filled with a strengthening, lubricating, abrasive, and / or polishing material, and may be wrapped in an outer sheath, slid into a casing, or provided with an other covering of all or part of the area of the brush stock, be infiltrated or sprayed at the surface with some material, have an increased packing fraction at the surface and / or have some or all of the touching points between the fibers or strands soldered, welded or otherwise thermally joined. Optionally also, the friction among the fibers may be reduced through light lubrication applied by rinsing the brush or brush stock in a lubricant. In one embodiment, the fiber brush is employed in a brush loading device having a hydrostatically controlled brush holder wherein the force exerted on the brush is controlled by a metallic or other conductive hydrostatic fluid which at the same time conducts the current to the brush.

The present invention provided a metal graphite brush in which any spark discharge is hardly produced. A metal graphite brush 1 is made up of a sintered body having pores 19 on its surface and interior, and feeds a coil 17 in such a manner that the coil 17, wound around a core 9 provided on a rotor 2 of a motor, comes slidably into contact with an electrically connected commutator8 at a slidably contacting surface. Emulsion containing liquid that is vaporized in response to temperature rise due to contacting with the commutator 8 when a motor is operating, and solvent having a higher boiling point than that of liquid as well as causing the liquid to disperse is included within the pore 19.

Electric motor components are formed of a conductive loaded resin-based material. The conductive loaded resin-based material comprises micron conductive powder(s), conductive fiber(s), or a combination of conductive powder and conductive fibers in a base resin host. The percentage by weight of the conductive powder(s), conductive fiber(s), or a combination thereof is between about 20% and 50% of the weight of the conductive loaded resin-based material. The micron conductive powders are metals or conductive non-metals or metal plated non-metals. The micron conductive fibers may be metal fiber or metal plated fiber. Further, the metal plated fiber may be formed by plating metal onto a metal fiber or by plating metal onto a non-metal fiber. Any platable fiber may be used as the core for a non-metal fiber. Superconductor metals may also be used as micron conductive fibers and / or as metal plating onto fibers in the present invention.