EP0791236B1 - Steckkommutator und verfahren zu dessen herstellung - Google Patents
Steckkommutator und verfahren zu dessen herstellung Download PDFInfo
- Publication number
- EP0791236B1 EP0791236B1 EP96928428A EP96928428A EP0791236B1 EP 0791236 B1 EP0791236 B1 EP 0791236B1 EP 96928428 A EP96928428 A EP 96928428A EP 96928428 A EP96928428 A EP 96928428A EP 0791236 B1 EP0791236 B1 EP 0791236B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- segments
- hub body
- overdimensioned
- region
- commutator 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/06—Manufacture of commutators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/14—Fastenings of commutators or slip-rings to shafts
Definitions
- the invention relates to a plug-in commutator, which has the features of the preamble of claim 1, and a method for its production, the has the features of the preamble of claim 15.
- the invention is therefore based on the object of a plug-in commutator create, despite a reduced force for inserting the segments the segments are reliably positioned in the grooves in the grooves.
- This The task is solved by a plug-in commutator with the features of claim 1, an undersize causing a clamping force is to be understood.
- a method for producing the plug-in commutator according to the invention is the subject of claim 15.
- Advantageous embodiments of the plug-in commutator according to the invention and the manufacturing method according to the invention are the subject of the subclaims.
- the grooves in that end section have which takes up the leading end of the segments when inserted, and the segments in their trailing end section the required excess. The segments can then go into the grooves with very little force be inserted until the leading end has the excess End portion of the grooves reached and the trailing end portion of the segments enters the grooves.
- the axial extent of the zones having the excess can vary his. Both a larger axial extension in the Area of the leading end section of the segments when inserted as well as in the area of their lagging end. In one embodiment the axial extent of the zones having the excess lies in the range of the leading end section at about 15% and in the area of the trailing End section at about 5% of the length of the brush track Part of the segments.
- Segments and grooves can be between those overlapping in the radial direction
- Surface areas of the segments and the hub body an intermediate space be present, which, however, will usually be relatively small.
- the segments have between them the brush tread forming a head part and a foot part from the Head part to the foot part widening middle part, which between the Flanks of the assigned groove is clamped. Thanks to the wedge shape of this
- the central part has a clamping force acting on the flanks of the central part radial component, which is intended for radial positioning Surfaces of the segments against the surfaces of the hub body assigned to them presses.
- the radial positioning of the segments can be done by that these shoulders against the surface areas of the webs facing them be pressed.
- the two shoulders of this segment preferably overlap less than half of the end face of the immediately adjacent one facing them Walkways. Between the head parts of two adjacent segments is the in The required circumferential distance exists. There is the space between the head parts of adjacent segments, preferably free of material parts of the hub body.
- the foot portion of each segment has Connection to the wider end of the middle part in a first section reduced width with formation of a step in the area of both flanks and in a second section adjoining the first section Compared to the first section greater width, forming one step each Area on both flanks.
- the foot section has a T-like cross-sectional profile.
- the middle part of the segments lies over the entire surface on the flanks of the receiving groove.
- the segments have at least two pairs of contact surfaces for anchoring. Preferably the angles between the pairs are different for each pair. This ensures that all contact surfaces despite manufacturing tolerances rest against the webs.
- the segments are first placed in a basket which is inserted into the Grooves dictates the positioning. This basket will then be plugged in the segments are inserted into an injection or pressing tool and pressed together or sprayed with.
- the plastic basket can only be used once.
- the clamping force solely by the excess in the area of the end sections of the segments and / or the part of the material of the hub body which serves to place the segments is determined, waived the basket.
- the exact positioning is done by the areas that are not oversized. The clamping force itself builds up at the end of the insertion process, does not affect this positioning more.
- the pressure and, if appropriate, the temperature are advantageously at Inserting the segments chosen so that not a largely indissoluble Press connection between the hub body and segments arises, but that the hub body and the segments are separated again can.
- a plug-in commutator produced by such a method is therefore recyclable.
- a plug-in commutator has an electrically insulating material Hub body 1, which is evenly distributed over its circumference arranged, identically formed and extending in the axial direction, and is provided radially open grooves 2. As can be seen in FIG. 2 lets, the grooves 2 begin at one end of the hub body 1, end but at a distance from the other end, this end of all grooves 2 in one Radial plane lies.
- the hub body 1 consists of a Phenolic-based molding compound. But there are also other insulating materials, such as thermoplastics or ceramics. Furthermore, that Material have a fiber reinforcement.
- the hub body 1 can according to the Manufacturing at a temperature that is above the operating temperature be annealed.
- a segment 4 is arranged in each of the grooves 2.
- the same trained Segments 4 consist of an electrical common for commutator segments well conductive material.
- the segments 4 a head part 5, the cylindrically curved end face 5 'of a part of the Brush tread forms.
- the segments 4 are symmetrical to their longitudinal center plane 6 trained.
- the head part 5 closes with formation a shoulder 7 to a middle part 8, the one measured in the circumferential direction Width at the end that merges into the shoulders 7 by the width of the shoulders 7 is less than the width of the head part 5.
- Die Shoulders close an obtuse angle opening towards the end face 5 ' on.
- the foot part 9 Widened from the head part 5 to a foot part designated as a whole as 9 the middle part 8 is wedge-like. Close its two flat flanks 8 ' in the embodiment an angle of 20 °.
- the foot part 9 has one the first section adjoining the middle part 8 via a shoulder 10 each 11, whose width in the area of the shoulders 10 by their width is smaller than that of the middle part 8.
- the width of the first section 11 takes evenly against the adjoining second section 12 from.
- a shoulder 13 closes with a correspondingly greater width the second section 12, the width of which is uniform towards its end face 9 ' decreases.
- the foot part 9 therefore has a T-like cross-sectional profile.
- each groove 2 has a cross-sectional shape that is geometrically similar to the foot part 9, however, the dimensions of the grooves 2 are slightly larger in this part than the dimensions of the foot part 9. This is between the foot part 9 and the lateral boundary surfaces of the part 9 receiving the foot part Grooves 2 have a slight gap 17.
- the webs 14 have in the zone 18 in which the when inserting the segments 4 in the grooves 2 leading end portion of the Segments 4 comes to rest in the fully inserted state
- End faces 15 of the webs 14 in the radial direction an oversize, which like that 5 shows a section through zone 18, which leads to that the shoulders 7 rest against the end surfaces 15 with pressure, whereby the clamping force is increased, which of the webs 14 on the flanks 8 'of the middle part 8 is exercised.
- the latter clamping force has one Component, which is directed against the foot part 9.
- the gap 17 extends located in the zone 18 between the end surface 9 'of the foot part 9 and the bottom the groove 2.
- the axial length of the zone 18 having the oversize x is about 15% of the axial length of the grooves 2 in the exemplary embodiment
- Ramp 19 is the transition from zone 18 to the rest of the area Bars 14 in which the end faces 15 of the bars 14 have a negative oversize, that is have an undersize y. Where there is undersize y is, as well Fig. 6 shows a gap 20 between the end faces 15 of the webs 14 and Shoulders 7 present.
- the segments 4 In the area of the lagging when the segments 4 are inserted into the grooves 2
- the end section the segments 4 have a zone 21 with an oversize z in radial direction of the end face 9 'of its foot part 9.
- This oversize z has how 6 shows a section through zone 21, for Consequence that the end surface 9 'with pressure at the bottom of the assigned groove 2nd is present and increases the clamping force which the webs 14 on the flanks 8 'of Exercise middle section 8.
- zone 21 between the Shoulders 7 and the end faces 15 of the webs 14 correspond to the gap 20 narrow slot 22 available.
- the oversize x and z are chosen so that in zones 18 and 21 the segments 4 exerted clamping forces for safe positioning and fixing the segments 4 in the hub body 1 does not fall below the necessary value.
- hook 25 which are integrally formed on the segments 4 and Connection of the segments 4 serve with conductors of a rotor winding.
- each segment 104 has two pairs of contact surfaces, and the rest in all details not described with the first embodiment matches.
- the middle part 108 of each segment 104 has, as in first exemplary embodiment, a pair of flanks 108 ', which serve as contact surfaces are formed on the webs 114 of the hub body 101. That radially after Flank 108 'opened on the inside encloses an angle ⁇ .
- the radially inside located foot part 109 of each segment 104 has a further pair of flanks 113, which are also designed as contact surfaces on the webs 114 are.
- the further flank pair 113 encloses an angle ⁇ and is also opened radially inwards.
- the hooks 25 according to Production of segments 4, 104 still bent in the tool.
- the segments 4, 104 are then pushed directly into the hub body 1, 101, that is under Pressure inserted.
- the parameters for pushing in, in particular pressure and optionally temperature, are chosen so that no indissoluble Press connection is created.
- you can still insert the segments 4, 104 the bore of the hub body 1,101 are machined.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Current Collectors (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Description
- Fig. 1
- eine Stirnansicht des ersten Ausführungsbeispiels,
- Fig. 2
- einen Schnitt nach der Linie II - II der Fig. 1,
- Fig. 3
- einen vergrößert dargestellten Ausschnitt aus Fig. 2,
- Fig. 4
- eine Stirnansicht eines der Segmente,
- Fig. 5
- einen vergrößert und unvollständig dargestellten Querschnitt des ersten Ausführungsbeispiels im Bereich des voreilenden Endabschnittes der Segmente,
- Fig. 6
- einen Querschnitt entsprechend Fig. 5 des ersten Ausführungsbeispiels im Bereich des nacheilenden Endabschnittes der Segmente,
- Fig. 7
- einen vergrößert und unvollständig dargestellten Querschnitt des zweiten Ausführungsbeispiels im Bereich des nacheilenden Endabschnitts der Segmente.
Claims (17)
- Steckkommutator mit einem aus elektrisch isolierendem Material bestehenden Nabenkörper (1; 101), der über seinen Umfang gleichmäßig verteilt angeordnete, gleich ausgebildete Nuten (2; 102) aufweist, in welche je eines von die Bürstenlauffläche bildenden, gleich ausgebildeten Segmenten (4; 104) unter Bildung einer in radialer Richtung formschlüssigen Verbindung eingesteckt und durch eine Klemmkraft, die auf einem Übermaß (x) der Segmente (4; 104) und/oder der der Anlage der Segmente (4; 104) dienenden Materialpartien des Nabenkörpers (1; 101) beruht, gegen eine Verschiebung relativ zum Nabenkörper (1; 101) gesichert sind, dadurch gekennzeichnet, daß das Übermaß (x) nur im Bereich der beiden Endabschnitte der Segmente (4; 104) und/oder der Nuten (2; 102) vorgesehen ist.
- Kommutator nach Anspruch 1, dadurch gekennzeichnet, daß der Nabenkörper (1;101) in derjenigen Zone (18), welche den beim Einstecken voreilenden Endabschnitt der Segmente (4; 104) aufnimmt, und die Segmente (4; 104) in dem beim Einstecken nacheilenden Endabschnitt Übermaße aufweisen.
- Kommutator nach Anspruch 2, dadurch gekennzeichnet, daß die Erstrekkung der das Übermaß aufweisenden Zone (18) des Nabenkörpers (1;101) in axialer Richtung größer ist als die entsprechende Erstreckung der das Übermaß aufweisenden Zone (21) der Segmente (4; 104).
- Kommutator nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß in dem zwischen den beiden Endabschnitten liegenden Mittelabschnitt sowohl der Segmente (4; 104) als auch der Nuten (2; 102) zwischen den sich in radialer Richtung überdeckenden Flächenbereichen der Segmente (4; 104) und des Nabenkörpers (1;101) ein Zwischenraum (17, 20, 22) vorhanden ist.
- Kommutator nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Segmente (4; 104) zwischen ihrem die Bürstenlauffläche bildenden Kopfteil (5) und einem Fußteil (9; 109) einen sich vom Kopfteil (5) zum Fußteil (9; 109) keilartig verbreiternden Mittelteil (8; 108) aufweisen, der zwischen den Flanken der zugeordneten Nut (2; 102) eingeklemmt ist.
- Kommutator nach Anspruch 5, dadurch gekennzeichnet, daß die in seiner Umfangsrichtung gemessene Breite des Kopfteils (5) der Segmente (4; 104) größer ist als die entsprechende Breite des Mittelteils (8; 108) an dem sich an den Kopfteil (5) anschließenden Ende, und daß die Segmente (4; 104) am Übergang vom Mittelteil (8; 108) zum Kopfteil (5) auf beiden Seiten je eine Schulter (7) aufweisen, welche die unmittelbar benachbarten, die Nut (2; 102) seitlich begrenzenden Stege (14; 114) des Nabenkörpers (1;101) übergreifen.
- Kommutator nach Anspruch 6, dadurch gekennzeichnet, daß die beiden Schultern (7) jedes Segmentes (4; 104) weniger als die Hälfte der ihnen zugewandten Endfläche (15) der unmittelbar benachbarten Stege (14; 114) übergreifen.
- Kommutator nach Anspruch 7, dadurch gekennzeichnet, daß der Zwischenraum zwischen den Kopfteile (5) benachbarter Segmente (4; 104) frei von Materialpartien des Nabenkörpers (1;101) ist.
- Kommutator nach einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, daß der Fußteil (9) jedes Segmentes (4) im Anschluß an das breitere Ende des Mittelteils (8) in einem ersten Abschnitt (11) eine reduzierte Breite unter Bildung je einer Schulter (13) im Bereich beider Flanken und in einem sich an den ersten Abschnitt (11) an schließenden zweiten Abschnitt (12) eine gegenüber ersterem größere Breite unter Bildung je einer Schulter (13) im Bereich beider Flanken aufweist.
- Kommutator nach einem der Ansprüche 5 bis 9, dadurch gekennzeichnet, daß der Mittelteil (8; 108) der Segmente (4; 104) vollflächig an den Flanken der ihn aufnehmenden Nut (2; 102) anliegt.
- Kommutator nach einem der Ansprüche 5 bis 10, dadurch gekennzeichnet, daß die am Übergang vom Mittelteil (8; 108) zum Kopfteil (5) gebildeten Schultern (7) der Segmente (4; 104) in derjenigen Zone (18) des Nabenkörpers (1;101), welche das Übermaß aufweist, mit Druck an den Endflächen (15) der Stege (14; 114) anliegen.
- Kommutator nach einem der Ansprüche 5 bis 11, dadurch gekennzeichnet, daß die dem Kopfteil (5) abgewandte Endfläche (9') des Fußteils (9) in der das Übermaß aufweisenden Zone (21) der Segmente (4; 104) mit Druck am Grund der das Segment (4; 104) aufnehmenden Nut (2; 102) anliegt.
- Kommutator nach einem der Ansprüche 1 bis 12, gekennzeichnet durch einen rampenförmigen Übergang von der Zone ohne Übermaß zu der Zone (18, 21) mit Übermaß sowohl bei den Segmenten (4; 104) als auch beim Nabenkörper (1;101).
- Kommutator nach einem der Ansprüche 1 bis 13, gekennzeichnet durch Segmente (104) mit wenigstens zwei Paaren von Anlageflächen (108', 113), insbesondere mit unterschiedlichen Winkeln (α, β) zwischen den Paaren.
- Verfahren zur Herstellung eines Steckkommutators nach einem der Ansprüche 1 bis 14, bei dem in an einem aus elektrisch isolierendem Material bestehenden Nabenkörper (1; 101) vorgesehene, über dessen Umfang gleichmäßig verteilt angeordnete, gleich ausgebildete Nuten (2; 102) je eines von die Bürstenlauffläche bildenden, gleich ausgebildeten Segmenten (4; 104) eingesteckt wird unter Bildung einer in radialer Richtung formschlüssigen Verbindung und unter Aufbau einer Klemmkraft, die auf einem Übermaß der Segmente und/oder der der Anlage der Segmente (4; 104) dienenden Materialpartie des Nabenkörpers (1; 101 ) beruht, das nur im Bereich der beiden Endabschnitte der Segmente und/oder der Nuten vorgesehen ist wobei die Segmente (4; 104) allein durch die Nuten (2; 102) positioniert und durch die Klemmkraft fixiert werden.
- Verfahren nach Anspruch 15, dadurch gekennzeichnet, daß an einem Ende der Segmente (4; 104) zum elektrischen Anschluß vorgesehene Haken (25) nach dem Einstecken gebogen werden.
- Verfahren nach Anspruch 15 oder 16, dadurch gekennzeichnet, daß die Segmente (4; 104) unter einem solchen Druck und einer solchen Temperatur in die Nuten (2; 102) des Nabenkörpers (1; 101) eingesteckt werden, daß der Nabenkörper (1; 101) und die Segmente (4; 104) wieder voneinander trennbar sind.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI9630208T SI0791236T1 (en) | 1995-08-16 | 1996-08-08 | Plug-in commutator and method for its production |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19530051 | 1995-08-16 | ||
DE19530051A DE19530051C2 (de) | 1995-08-16 | 1995-08-16 | Steckkommutator |
PCT/EP1996/003505 WO1997007573A1 (de) | 1995-08-16 | 1996-08-08 | Steckkommutator und verfahren zu dessen herstellung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0791236A1 EP0791236A1 (de) | 1997-08-27 |
EP0791236B1 true EP0791236B1 (de) | 2000-03-29 |
Family
ID=7769576
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96928428A Expired - Lifetime EP0791236B1 (de) | 1995-08-16 | 1996-08-08 | Steckkommutator und verfahren zu dessen herstellung |
Country Status (10)
Country | Link |
---|---|
US (1) | US5760517A (de) |
EP (1) | EP0791236B1 (de) |
JP (1) | JPH10507577A (de) |
BR (1) | BR9606583A (de) |
DE (2) | DE19530051C2 (de) |
ES (1) | ES2146409T3 (de) |
HU (1) | HUP9702438A3 (de) |
SK (1) | SK47097A3 (de) |
TR (1) | TR199700298T1 (de) |
WO (1) | WO1997007573A1 (de) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2175172T3 (es) * | 1996-12-12 | 2002-11-16 | Comtrade Handelsgmbh | Conmutador y procedimiento para su fabricacion. |
GB2314693B (en) * | 1997-09-29 | 1998-08-12 | Watliff Co Ltd | A plug in commutator, a plug in segment for making a plug in commutator and a hub body for making a plug in commutator |
DE19744357A1 (de) * | 1997-10-08 | 1999-04-15 | Bosch Gmbh Robert | Kommutator |
US5949174A (en) * | 1998-07-08 | 1999-09-07 | Siemens Canada Limited | Commutator for two speed electric motor and motor incorporating same |
DE19922235C2 (de) * | 1998-08-21 | 2002-05-23 | Kirkwood Ind Gmbh | Kommutator und Verfahren zur Herstellung eines Kommutators |
DE19837961C2 (de) * | 1998-08-21 | 2001-08-16 | Kirkwood Ind Gmbh | Kommutator und Verfahren zur Herstellung eines Kommutators |
DE19854843A1 (de) * | 1998-11-27 | 2000-06-08 | Kirkwood Ind Gmbh | Vorrichtung zum Stromwenden, insbesondere Kommutator, und Verfahren zur Herstellung einer solchen Vorrichtung |
JP3559181B2 (ja) * | 1998-11-30 | 2004-08-25 | 三菱電機株式会社 | 電動パワーステアリング装置用モータ |
JP4166387B2 (ja) * | 1999-10-04 | 2008-10-15 | アスモ株式会社 | 給電ブラシ付電動機 |
DE10250261A1 (de) * | 2002-10-28 | 2004-06-09 | Kolektor D.O.O. | Kommutator für eine elektrische Maschine und Verfahren zu seiner Herstellung |
DE102005028791A1 (de) * | 2005-06-16 | 2006-12-28 | Kautt & Bux Gmbh | Plankommutator und Verfahren zur Herstellung eines Plankommutators |
JP5340531B2 (ja) * | 2006-10-19 | 2013-11-13 | 株式会社デンソー | 回転電機 |
DE102010038993A1 (de) * | 2010-08-06 | 2012-02-09 | BSH Bosch und Siemens Hausgeräte GmbH | Kommutator für eine elektrische Maschine und zugehöriges Herstellungsverfahren |
CN105896225B (zh) * | 2016-06-13 | 2018-05-22 | 薛瑞华 | 钩型换向器 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE307451C (de) * | ||||
DE669872C (de) * | 1939-01-05 | Electricitaetsgesellschaft San | Verfahren zur Herstellung von Kollektoren | |
GB1172308A (en) * | 1966-03-22 | 1969-11-26 | Fed Motor Parts Corp Proprieta | Improvements in or relating to Commutators |
GB2221580B (en) * | 1988-08-04 | 1992-09-23 | Johnson Electric Ind Mfg | A two part commutator assembly for an electric motor |
WO1995014319A1 (de) * | 1993-11-15 | 1995-05-26 | Kautt & Bux Commutator Gmbh | Kommutator und verfahren zu seiner herstellung |
SI9300660A (en) * | 1993-12-16 | 1995-06-30 | Kolektor D O O Idrija | Commutator for small and midle electric machines and process for making it |
-
1995
- 1995-08-16 DE DE19530051A patent/DE19530051C2/de not_active Expired - Fee Related
-
1996
- 1996-08-08 SK SK470-97A patent/SK47097A3/sk unknown
- 1996-08-08 HU HU9702438A patent/HUP9702438A3/hu unknown
- 1996-08-08 WO PCT/EP1996/003505 patent/WO1997007573A1/de active IP Right Grant
- 1996-08-08 TR TR97/00298T patent/TR199700298T1/xx unknown
- 1996-08-08 BR BR9606583A patent/BR9606583A/pt not_active Application Discontinuation
- 1996-08-08 EP EP96928428A patent/EP0791236B1/de not_active Expired - Lifetime
- 1996-08-08 ES ES96928428T patent/ES2146409T3/es not_active Expired - Lifetime
- 1996-08-08 DE DE59604838T patent/DE59604838D1/de not_active Expired - Fee Related
- 1996-08-08 US US08/817,396 patent/US5760517A/en not_active Expired - Fee Related
- 1996-08-08 JP JP8532824A patent/JPH10507577A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
ES2146409T3 (es) | 2000-08-01 |
DE19530051C2 (de) | 2002-02-07 |
JPH10507577A (ja) | 1998-07-21 |
EP0791236A1 (de) | 1997-08-27 |
HUP9702438A3 (en) | 2000-03-28 |
WO1997007573A1 (de) | 1997-02-27 |
BR9606583A (pt) | 1997-10-28 |
DE19530051A1 (de) | 1997-02-20 |
HUP9702438A2 (hu) | 1998-03-30 |
US5760517A (en) | 1998-06-02 |
SK47097A3 (en) | 1997-10-08 |
TR199700298T1 (tr) | 1997-08-21 |
DE59604838D1 (de) | 2000-05-04 |
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