Fluid Pressure-operated Patents (Class 310/243)
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Patent number: 8040016Abstract: The present invention relates to a brush 10 suitable for coming into contact with conducting plates 12 provided on an electric motor commutator 11. According to the invention, the brush has a means 15 for adjusting its pole coverage between the start of life of the motor and its stabilized operation. This is therefore a brush with pole coverage that can be varied over its operating life. Such a brush is more particularly fitted into a motor for a ventilation (air conditioning) system for motor vehicle.Type: GrantFiled: December 13, 2006Date of Patent: October 18, 2011Assignee: Brose Fahrzeugteile GmbH & Co.Inventors: Eric Fournier, Florence Campagne, Maurad Berkouk
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Patent number: 7960891Abstract: A power tool has an electric motor that includes a commutator, with which at least one commutator brush is acted upon with spring force via at least one commutator spring in the direction of a non-rotatable collector of the commutator. At least one auxiliary tool for adjusting the commutator spring is located on a component of the power tool.Type: GrantFiled: February 25, 2008Date of Patent: June 14, 2011Assignee: Robert Bosch GmbHInventor: Florian Esenwein
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Patent number: 7893592Abstract: The invention relates to an electric motor (10) and to a method for producing said electric motor, especially for adjusting mobile parts in a motor vehicle. Said electric motor comprises a collector (36), arranged on an armature (38) and electrically contacted via hammer brushes (12). The armature (38) is surrounded by a lower housing part (32) and an upper housing part (34) which can be assembled in a radial direction (50) in relation to the armature (38). The hammer brushes (12) comprise one fastening element (26) each which engages directly in a seat (30) of the lower or upper housing part (32, 34).Type: GrantFiled: August 16, 2006Date of Patent: February 22, 2011Assignee: Robert Bosch GmbHInventors: Stefan Hornung, Thomas Huck, Tarek Mili, Armin Niederer, Diyap Bueyuekasik, Lars-Dirk Anding
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Patent number: 6903484Abstract: An electrical brush holder and ancillary cable for applying a mechanical force to an electrical brush and for establishing electrical contact between the electrical brush and a current conducting element. The brush holder includes a first wall fastened to the current conducting element, a second wall fastened to the brush, a sidewall lengthwise extendable in an axis direction of the brush and a flexible cable composed of ultra-fine metal fibers configured to conduct current between the current conducting element and the brush. The sidewall cooperates with the first and second walls to form a volume defined by the first wall, the second wall and the sidewall. A fluidic pressurized medium may be contained in the volume for applying a light approximately constant pressure to the brush.Type: GrantFiled: April 21, 2000Date of Patent: June 7, 2005Inventor: Doris Kuhlmann-Wilsdorf
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Patent number: 6777849Abstract: In a rotary electric machine using a sintered oil-impregnated bearing, oil that oozes out from the sintered oil-impregnated bearing is prevented from attaching onto a brush. In a stay part providing a brush holder stay, there is formed a through hole into which the sintered oil-impregnated bearing is fitted. A pair of holder portions that each accommodate therein a brush are formed to diametrically face each other. A terminal-fixing portion is formed on one side of each holder portion. A prescribed gap exists between the one side position and the terminal-fixing portion. By closing the inner-radial end of the gap by an end wall, a first oil pool is formed. Thus, the first oil pool is structured as an oil pool on an oil path of any oozed oil flowing from the through hole toward the outer radial side of the holder portion to prevent the oil from entering the holder portion.Type: GrantFiled: June 24, 2003Date of Patent: August 17, 2004Assignee: Mitsuba CorporationInventors: Yusuke Fujita, Keiji Kiuchi, Shinichi Hagiwara, Ken Yamamoto, Tomio Kudo
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Patent number: 4567414Abstract: A method and a device for controlling a brush-commutator assembly of a machine under application of an electrical processing and control unit, by sensing one or more operating parameters of the electric machine, the sensing values being processed and converted into one or more control signals controlling the operation of the brush-commutator assembly to provide an optimal commutation process of the machine current. The machine current is sensed and the pressing exerted on the brushes is controlled by a fluid under pressure; the brush tracks, moreover, being engaged and disengaged upon increase and decrease of the machine current respectively in order to maintain an optimal current density in the brushes. One or more sensors for sensing operating parameters of the electric machine are used and a processing and control unit to process the signals sensed by the sensors and to supply control signals to one or more control means controlling the operation of the brush-commutator assembly.Type: GrantFiled: July 11, 1983Date of Patent: January 28, 1986Inventor: Josephus B. M. Berings
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Patent number: 4459504Abstract: A homopolar generator having a rotor with a slip ring surface utilizes an inflatable diaphragm to force the current-collecting brushes into contact with the rotor slip ring. The diaphragm is molded around a metal core. An opening in the metal core directs pressurized gas into a diaphragm cavity to expand the diaphragm against the back of the brush.Type: GrantFiled: May 26, 1982Date of Patent: July 10, 1984Assignee: Board of Regents, University of Texas SystemInventors: William F. Weldon, John H. Gully, Kurth P. Bousman
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Patent number: 4071795Abstract: Brush gear for electrical machinery comprises a brush movably mounted on a support and a flexible housing which connects the brush with the support and contains a quantity of liquid metal to form a current flow path between the brush and the support. The brush, which is preferably composed of resilient fibres, may be adjustable by a positive drive mechanism, the necessary movement being permitted by bellows walls or diaphragms forming the housing.Type: GrantFiled: September 2, 1975Date of Patent: January 31, 1978Assignee: International Research & Development Company LimitedInventors: Peter Philip Dobbing, Peter William Kendall