EP0796663A2 - Pulvérisateur rotatif pour le revêtement assisté par voie électrostatique d'objets par des peintures ou des lacques - Google Patents

Pulvérisateur rotatif pour le revêtement assisté par voie électrostatique d'objets par des peintures ou des lacques Download PDF

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Publication number
EP0796663A2
EP0796663A2 EP97104734A EP97104734A EP0796663A2 EP 0796663 A2 EP0796663 A2 EP 0796663A2 EP 97104734 A EP97104734 A EP 97104734A EP 97104734 A EP97104734 A EP 97104734A EP 0796663 A2 EP0796663 A2 EP 0796663A2
Authority
EP
European Patent Office
Prior art keywords
spray head
drive shaft
contact
rotary atomizer
atomizer according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP97104734A
Other languages
German (de)
English (en)
Other versions
EP0796663B1 (fr
EP0796663A3 (fr
Inventor
Michael Baumann
Harry Krumma
Frank Rupertus
Rolf Schneider
Kurt Vetter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Duerr Systems AG
Original Assignee
Duerr Systems AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Duerr Systems AG filed Critical Duerr Systems AG
Publication of EP0796663A2 publication Critical patent/EP0796663A2/fr
Publication of EP0796663A3 publication Critical patent/EP0796663A3/fr
Application granted granted Critical
Publication of EP0796663B1 publication Critical patent/EP0796663B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/053—Arrangements for supplying power, e.g. charging power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
    • B05B5/0426—Means for supplying shaping gas

Definitions

  • So-called rotary atomizers are often used for painting or color coating objects, in particular vehicle bodies, which have a metallic spray head rotating at high speed, which is usually bell-shaped, namely rotationally symmetrical to its axis of rotation and open in the direction of the object to be painted; the paint to be atomized is fed into the interior of the spray head and then thrown off in the form of very fine droplets from the free edge of the spray head, which is designed as an edge. So that the paint particles are deposited on the object to be painted, the paint particles are electrically charged and such an electric field is generated between the rotary atomizer and the object to be painted that the charged paint particles are drawn to the object to be coated.
  • a plurality of high-voltage electrodes are provided for this purpose, which are arranged at equal angular intervals from one another around the spray head rotation axis, namely radially outside the spray head; the free ends of these electrodes facing the object to be painted are in the form of tips, so that not only does an electrical field form between these electrode tips and the object that is usually grounded, but the air in the vicinity of the electrode tips is ionized when you put the electrodes on a high, usually applies negative electrical potential, e.g. B. at -50 to -100 kV.
  • the paint particles thrown off by the spray head are negatively charged if they fly through the ionized air area due to the centrifugal forces, but also as a result of the air flow generated by the spray head rotating at high speed - due to the bell-shaped design of the spray head, this air flow has both a radial and one axial component.
  • a drive shaft carrying the spray head is driven by means of a compressed air turbine at extremely high speeds (30,000 - 60,000 rpm); at such high speeds, conventional rolling element bearings do not have the required service life, which is why in these known high-speed rotary atomizers the spray head drive shaft is mounted in the housing of the rotary atomizer by means of air bearings - such an air bearing has an air gap between two concentric cylindrical bearing surfaces that are coaxial with the drive shaft Air is the actual storage medium.
  • the spray head drive shaft is designed as a hollow shaft in order to achieve procedural advantages, especially for the purpose of supplying the paint or the paint to be processed centrally to the spray head, namely via a central longitudinal channel running in this hollow shaft ;
  • the further development of these high-speed rotary atomizers has recently led to the fact that the inside diameter of the hollow shaft forming the spray head drive shaft, and thus of course also the outside diameter thereof, has become larger and larger in order to be able to perform other functions via the inside of the hollow shaft, a fact which Makes air bearings even more indispensable, because as the outside diameter of the spray head drive shaft increases, the rotational speed to be controlled in the bearings also increases.
  • the invention was based on the object of improving the paint or paint application produced with the aid of the modern high-speed atomizers described.
  • the invention therefore relates to a rotary atomizer for the electrostatically assisted coating of objects with paints or varnishes, with an electrically conductive, rotationally drivable at high speed about an axis of rotation, Approximately bell-shaped spray head for throwing off paint or lacquer particles from a free edge of the spray head which is concentric with the axis of rotation, an electrically conductive spray head drive shaft which is coaxial with the axis of rotation and can be driven by means of a compressed air turbine and which is connected to the spray head in an electrically conductive manner and which in a housing by means of Air bearings and thus rotatably supported contact-free and designed to form a paint supply channel as a hollow shaft, and with several, evenly distributed around the axis of rotation and radially outside of the spray head arranged high voltage electrodes for generating an electric field between their tips facing the objects to be coated and these objects.
  • an electrical contact device which is stationary with respect to the housing is provided in order to put the spray head and thus also its drive shaft at a defined electrical potential, in particular to ground which has at least one contact element which is electrically conductively connected to a potential source and which is in contact with a region of the spray head drive shaft whose radial distance from the axis of rotation is greater than half the diameter of the longitudinal channel of the drive shaft at this contact point, and that the contact element is formed by a carbon fiber bundle, another element of at least the same high wear resistance and contact ability or by an electrically conductive liquid.
  • a rotary atomizer Since in a rotary atomizer according to the invention the spray head is at a temporally constant and defined electrical potential and a defined electric field is formed between the high-voltage electrodes and the edge of the spray head, such a rotary atomizer has the same charging conditions for all paint droplets thrown off by the spray head, which leads to a Uniformity of the application of the paint or color on the object to be coated leads.
  • the spray head is grounded via the contact element or the contact elements, the paint particles thrown off by the spray head are initially charge-free and experience a charge only when the air ionized by the high-voltage electrodes flies through, so that under the action of the centrifugal forces and in the air flow described above, generated by the spray head rotating at high speed, at least almost unrestrained in the area of the electric field generated between the high-voltage electrodes and the object to be coated, which also increases the efficiency of the deposition the paint particles on the object to be coated.
  • the invention also makes it possible to further increase the efficiency of the application of the paint or color to the object to be coated: the known high-speed rotary atomizers which are improved by the present invention operate with operating currents of at most approximately 200 ⁇ A;
  • the inventors have now found that with the usual air gap width of the air bearings of these known rotary atomizers in the latter an increase in the operating current to flashovers between the spray head drive shaft and the surrounding and usually electrically conductive and grounded housing, but especially between the Air gap between the surrounding bearing surfaces of the air bearings, and such flashovers not only result in erosions on the elements mentioned, but the particles released from the components by the flashovers also lead to contamination of the components, so that they block after a relatively short operating time the spray head drive shaft comes.
  • a rotary atomizer according to the invention now allows much higher operating currents, since the drive shaft can be connected to a defined electrical potential and in particular to ground, so that spark erosion processes cannot occur, and it is obvious that an increase in the operating current also increases the Paint job leads per unit of time.
  • the US-PS 4,369,924 discloses a rotary atomizer in which a bell-shaped metallic spray head is carried by a metallic drive shaft mounted in air bearings; the paint to be atomized is fed eccentrically to the spray head, the spray head drive shaft has no longitudinal channel, and a high, negative electrical potential is applied to the drive shaft and thus to the spray head by pressing against the flat end face of the drive shaft facing away from the spray head Atomizer housing is held stationary, circular cylindrical and with the drive shaft axis coaxial carbon contact is connected, which is connected to a high voltage generator.
  • Contact-making carbon fiber brushes which consist of carbon fibers held together in a bundle, have proven to be particularly simple, inexpensive and extremely wear-resistant Contact elements proven, and suitable carbon fibers are offered by a larger number of manufacturers on the market, although mostly for completely different purposes, namely mainly as mechanical reinforcing elements such.
  • Carbon fibers available on the market have good electrical conductivity and have proven to be extremely resistant to wear caused by friction if the surface contacting and moving the fiber ends is oriented approximately transversely to the longitudinal direction of the fibers.
  • the construction can be designed such that the contact element bears against an end face of the spray head drive shaft, this end face also being only a cross to The surface of a step of the shaft body that runs on the shaft axis can act.
  • the advantage associated with the contacting of an end face of the drive shaft is that the drive shaft can then be contacted in the immediate vicinity of the longitudinal channel of the spray head drive shaft, i. H. in an area in which the peripheral speed is significantly lower than on the outer circumference of the drive shaft.
  • the contact element bears against an outer peripheral region of the spray head drive shaft and is in particular approximately radially oriented;
  • Such embodiments have the advantage that the contact device can be provided with a larger number of contact elements, so that these can bear against the spray head drive shaft with a lower contact pressure than in the case of a contact device with only one contact element, without reliable, continuous contacting of the Drive shaft would be at risk, and naturally the contact wear also decreases with the contact pressure.
  • the contact device has a contact element carrier which surrounds the axis of rotation and is concentric with the latter and to which the contact elements are attached.
  • a contact element carrier which surrounds the axis of rotation and is concentric with the latter and to which the contact elements are attached.
  • the carrier is expediently a metallic component; then only a single connection or contact to the carrier is required, whereas in the case of an electrically non-conductive carrier, each individual contact element would have to be connected separately.
  • each carbon fiber bundle is designed as a manageable unit, in that it is held in the region of its end facing away from the drive shaft in a metal sleeve which is inserted into one of the receiving bores of the carrier, preferably with a press fit to ensure a good electrical connection between the metallic carrier and the carbon fiber bundles.
  • a bell-shaped spray head 10 is shown in dashed lines, which is to be driven at high speed about an axis of rotation 12.
  • the paint to be atomized is fed centrally to this spray head by means of a nozzle 13; the supplied paint then reaches the inner wall of the rotating spray head 10, on which the paint, thanks to the conical shape of the spray head and its rotation, travels to an edge 14 of the spray head from which the paint is thrown off in the form of very fine droplets, as shown in FIG 1 obliquely outwards and to the left - because of the centrifugal forces and the air flow generated by the rotating spray head, which also has a flow component directed to the left according to FIG.
  • a metallic drive shaft 16 designed as a hollow shaft and firmly connected to the metallic spray head 10 and coaxial with the axis of rotation 12, is rotatably supported ; It is driven by a compressed air turbine, which is accommodated in an assembly 18 together with the air bearings mentioned and, for the reasons mentioned, requires no further explanation.
  • the assembly 18 is also shown in Fig. 2; it has a housing 20, partially drawn in section in FIG. 2, to which a control valve 22, also indicated in FIG. 1, with a metallic housing 24 is connected to the rear (to the right according to FIG. 1).
  • the spray head drive shaft 16 forms an axial, central paint supply channel 26, into which the paint to be atomized is introduced via a bore 28 in the control valve housing 24.
  • a rear (right side according to FIG. 2) end face of the drive shaft 16 was designated 30, a circumferential face of the drive shaft 32.
  • an outer housing 100 of the rotary atomizer several, e.g. B. six, high-voltage electrodes 102 are arranged, for each of which an electrode holder 104 and an interchangeably attached insulating body 106 are provided.
  • the latter has a recess 106a on its left end face according to FIG. 1, into which a tip 102a of the high-voltage electrode 102 projects.
  • the electrode is fastened centrally in the insulating body 106; its right end according to FIG. 1 is in a manner not to be described in more detail with one 1, the negative high-voltage potential source shown, and, as can be seen in FIG. 1, the electrode tip 102a does not protrude beyond the plane which is defined by the outer edge of the depression 106a of the insulating body 106.
  • the electrode holders 104 are arranged at equal angular distances from one another about the axis of rotation 12, project together with their insulating bodies 106 in a finger shape obliquely outwards and to the left (according to FIG. 1) and are designed and arranged such that the electrode tips 102a are in one lie perpendicular to the axis of rotation 12, which is located at an axial distance behind the spray head 10, d. H. 1 to the right of the spray head.
  • the contact device designated as a whole by 40 consists of a metallic, annular support 42 which is concentric with the axis of rotation 12 in the installed state, and six contact elements, each designated as a whole by 44.
  • the carrier 42 was provided with a radial receiving bore 46, and each contact element 44 consists of a carbon fiber bundle 48, the individual carbon fibers of which are held together by a metal sleeve 50 to form a bundle by the carbon fiber bundle 48 being press-fitted into the metal sleeve 50.
  • This or the receiving bore 46 is in turn dimensioned so that the Metal sleeve 50 is press-fitted in the receiving bore 46.
  • the contact elements 44 are preferably arranged at equally large angular distances from one another on the carrier 42.
  • the latter has, in the region of its rear end face 60 (in the installed state), which forms a front end face in FIG. 3, two approximately circular segment-shaped recesses 62, which are used to fasten the carrier 42 to the rear end face of the housing 20, as shown in FIG. 2 by means of screws (not shown in FIG. 2), the heads of which partly come to rest in one of the cutouts 62.
  • a third recess namely a contact recess 70, is provided on the carrier 42, the function of which will be explained later.
  • FIG. 2 shows only a region of the carrier 42 in which none of the contact elements 44 are located.
  • FIG. 5 now shows how the contact device 40 is attached to the rear of the assembly 18 and contacts the periphery of the drive shaft 16.
  • FIG. 5 shows two fastening screws 76, the screw heads 76a of which engage in one of the fastening recesses 62 of the carrier 42.
  • a contact spring 80 is arranged, which rests against the contact surface of the contact recess 70 of the carrier 42.
  • this contact device 40 ' has a metallic carrier plate 42' which is fastened to the control valve housing 24 by means of screws and is provided with a plurality of contact elements 44 'which are now axially aligned and which bear against the rear end face 30 of the drive shaft 16.
  • Each of the contact elements 44 ' should be formed in the same way and fastened in the carrier plate 42, as was described above for the first embodiment.
  • FIG. 2 shows a third embodiment, in which contact elements 44 ′′ are held by the metallic housing 20 of the assembly 18 and contact a region of the drive shaft 16 lying further forward on an outer peripheral surface 32.
  • the contact elements 44 ′′ should also be designed in the same way as the contact elements 44 of the first embodiment; in addition, they should be attached to the housing 20 in the same way as the contact elements 44 on the carrier 42.
  • the spray head 10 using the contact device according to the invention can be placed on ground potential, and since the object to be coated is preferably also at ground potential, not only does a defined electric field form between the electrode tips 102a and the object to be coated during operation of the rotary atomizer according to the invention, but also a defined and temporally constant electric field between the electrode tips 102a and the edge 14 of the spray head 10.
  • the electrode tips 102a result in the air being ionized in areas through which the droplets of paint initially thrown off by the spray head 10 or its edge 14, which are initially electrically neutral, fly through and thereby become electrically negatively charged, so that they subsequently along the field lines between the Electrode tips 102a and the object prevailing electric field to be coated are attracted to this object.

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  • Electrostatic Spraying Apparatus (AREA)
EP97104734A 1996-03-22 1997-03-20 Pulvérisateur rotatif pour le revêtement assisté par voie électrostatique d'objets par des peintures ou des lacques Expired - Lifetime EP0796663B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19611369 1996-03-22
DE19611369A DE19611369A1 (de) 1996-03-22 1996-03-22 Rotationszerstäuber zum elektrostatisch unterstützten Beschichten von Gegenständen mit Farben bzw. Lacken

Publications (3)

Publication Number Publication Date
EP0796663A2 true EP0796663A2 (fr) 1997-09-24
EP0796663A3 EP0796663A3 (fr) 1998-12-23
EP0796663B1 EP0796663B1 (fr) 2001-08-22

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EP97104734A Expired - Lifetime EP0796663B1 (fr) 1996-03-22 1997-03-20 Pulvérisateur rotatif pour le revêtement assisté par voie électrostatique d'objets par des peintures ou des lacques

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EP (1) EP0796663B1 (fr)
DE (2) DE19611369A1 (fr)
ES (1) ES2159788T3 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1384515A1 (fr) * 2002-07-22 2004-01-28 Dürr Systems GmbH Compensateur de charge pour un atomiseur rotatif
EP1393816A1 (fr) 2002-08-28 2004-03-03 Dürr Systems GmbH Dispositif de revêtement comprenant un pulvérisateur rotatif et son procédé de commande
US7136271B2 (en) 2003-03-17 2006-11-14 Illinois Tool Works Inc Static charge neutralizing assembly for use on rollers and shafts
US7193836B2 (en) 2003-03-17 2007-03-20 Illinois Tool Works Inc Grounding brush for mitigating electrical current on motor shafts
US7339777B2 (en) 2006-01-12 2008-03-04 Illinois Tool Works Inc Grounding system for a rotating shaft
US7520450B2 (en) 2006-10-10 2009-04-21 Illinois Tool Works Inc. Electrical connections for coating material dispensing equipment
US8169766B2 (en) 2003-03-17 2012-05-01 Illinois Tool Works, Inc. Shaft current control brush ring assembly
WO2013003331A3 (fr) * 2011-06-28 2013-05-02 Illinois Tool Works Inc. Ensemble balai de régulation de courant
WO2013062988A3 (fr) * 2011-10-28 2014-06-12 Illinois Tool Works Inc. Ensemble de balai de commande de courant

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10115463A1 (de) 2001-03-29 2002-10-02 Duerr Systems Gmbh Zerstäuber für eine Beschichtungsanlage und Verfahren zu seiner Materialversorgung
DE10202711A1 (de) 2002-01-24 2003-07-31 Duerr Systems Gmbh Zerstäuber für die elektrostatische Serienbeschichtung von Werkstücken
DE10231421A1 (de) 2002-07-11 2004-01-22 Dürr Systems GmbH Verfahren und System zur Versorgung eines Pulverbeschichtungsgerätes
DE10233199A1 (de) 2002-07-22 2004-02-05 Dürr Systems GmbH Turbinenmotor eines Rotationszerstäubers
DE10239516A1 (de) 2002-08-28 2004-03-18 Dürr Systems GmbH Schlauch für die elektrostatische Beschichtung von Werkstücken
DE10240451A1 (de) 2002-09-02 2004-03-11 Dürr Systems GmbH Sensoranordnung für eine Beschichtungsanlage
DE10245594A1 (de) 2002-09-30 2004-04-08 Dürr Systems GmbH Verfahren zur Kollisionserkennung
US6991178B2 (en) 2003-01-24 2006-01-31 Dürr Systems, Inc. Concentric paint atomizer shaping air rings
US8671495B2 (en) 2006-11-06 2014-03-18 Durr Systems, Inc. Scraper pig
DE102010027391A1 (de) 2010-07-16 2011-08-25 Eisenmann Ag, 71032 Rotationszerstäuber zum elektrostatisch unterstützten Aufbringen von Lackpartikeln
DE102011121915A1 (de) 2011-12-22 2013-06-27 Eisenmann Ag Elektrodenanordnung und elektrostatischer Zerstäuber mit einer solchen
DE102012021218A1 (de) 2012-10-27 2014-04-30 Volkswagen Aktiengesellschaft Lackiervorrichtung und Verfahren zum Betrieb einer Lackiervorrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0041008A1 (fr) * 1980-05-27 1981-12-02 Bernard Marchand Tête atomisante rotative pour appareils d'application, par voie électrostatique, de produits liquides, tels que notamment peintures et vernis
EP0120648A2 (fr) * 1983-03-24 1984-10-03 Nordson Corporation Appareil et procédé pour charger par induction un matériau de revêtement conducteur atomisé par la force centrifuge
US4811906A (en) * 1985-07-05 1989-03-14 Sames S.A. Rotary spray head suitable for electrostatic painting
DE4105116A1 (de) * 1991-02-19 1992-08-20 Behr Industrieanlagen Vorrichtung und verfahren zum elektrostatischen beschichten von gegenstaenden
DE4340441A1 (de) * 1992-12-03 1994-06-09 Nordson Corp Rotationszerstäuber

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56163774A (en) * 1980-05-21 1981-12-16 Toyota Motor Corp Rotary atomization electrostatic painting device
DE3616684A1 (de) * 1986-05-16 1987-11-19 Behr Industrieanlagen Zerstaeuber zum elektrostatischen beschichten von gegenstaenden
EP0283918B1 (fr) * 1987-03-23 1991-07-10 Behr Industrieanlagen GmbH & Co. Dispositif de revêtement électrostatique d'objets

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0041008A1 (fr) * 1980-05-27 1981-12-02 Bernard Marchand Tête atomisante rotative pour appareils d'application, par voie électrostatique, de produits liquides, tels que notamment peintures et vernis
EP0120648A2 (fr) * 1983-03-24 1984-10-03 Nordson Corporation Appareil et procédé pour charger par induction un matériau de revêtement conducteur atomisé par la force centrifuge
US4811906A (en) * 1985-07-05 1989-03-14 Sames S.A. Rotary spray head suitable for electrostatic painting
DE4105116A1 (de) * 1991-02-19 1992-08-20 Behr Industrieanlagen Vorrichtung und verfahren zum elektrostatischen beschichten von gegenstaenden
DE4340441A1 (de) * 1992-12-03 1994-06-09 Nordson Corp Rotationszerstäuber

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1384515A1 (fr) * 2002-07-22 2004-01-28 Dürr Systems GmbH Compensateur de charge pour un atomiseur rotatif
US8840050B2 (en) 2002-07-22 2014-09-23 Durr Systems, Inc. Potential neutralization arrangement for an electrostatic rotary atomizer
EP1393816A1 (fr) 2002-08-28 2004-03-03 Dürr Systems GmbH Dispositif de revêtement comprenant un pulvérisateur rotatif et son procédé de commande
US8169766B2 (en) 2003-03-17 2012-05-01 Illinois Tool Works, Inc. Shaft current control brush ring assembly
US7193836B2 (en) 2003-03-17 2007-03-20 Illinois Tool Works Inc Grounding brush for mitigating electrical current on motor shafts
US8199453B2 (en) 2003-03-17 2012-06-12 Illinois Tool Works Inc. Shaft current control brush ring assembly
US7136271B2 (en) 2003-03-17 2006-11-14 Illinois Tool Works Inc Static charge neutralizing assembly for use on rollers and shafts
US7339777B2 (en) 2006-01-12 2008-03-04 Illinois Tool Works Inc Grounding system for a rotating shaft
US7520450B2 (en) 2006-10-10 2009-04-21 Illinois Tool Works Inc. Electrical connections for coating material dispensing equipment
WO2013003331A3 (fr) * 2011-06-28 2013-05-02 Illinois Tool Works Inc. Ensemble balai de régulation de courant
US8734164B2 (en) 2011-06-28 2014-05-27 Illinois Tool Works Inc. Current control brush assembly having axial and radial filaments
WO2013062988A3 (fr) * 2011-10-28 2014-06-12 Illinois Tool Works Inc. Ensemble de balai de commande de courant
US8963398B2 (en) 2011-10-28 2015-02-24 Illinois Tool Works Inc. Current control brush assembly

Also Published As

Publication number Publication date
DE59704343D1 (de) 2001-09-27
EP0796663B1 (fr) 2001-08-22
ES2159788T3 (es) 2001-10-16
EP0796663A3 (fr) 1998-12-23
DE19611369A1 (de) 1997-09-25

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