EP0917932B1 - Kniehebelspannvorrichtung, insbesondere zur Verwendung im Karosseriebau der Kfz-Industrie - Google Patents
Kniehebelspannvorrichtung, insbesondere zur Verwendung im Karosseriebau der Kfz-Industrie Download PDFInfo
- Publication number
- EP0917932B1 EP0917932B1 EP98119088A EP98119088A EP0917932B1 EP 0917932 B1 EP0917932 B1 EP 0917932B1 EP 98119088 A EP98119088 A EP 98119088A EP 98119088 A EP98119088 A EP 98119088A EP 0917932 B1 EP0917932 B1 EP 0917932B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- toggle lever
- grip head
- toggle
- lever clamp
- support plate
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/06—Arrangements for positively actuating jaws
- B25B5/12—Arrangements for positively actuating jaws using toggle links
- B25B5/122—Arrangements for positively actuating jaws using toggle links with fluid drive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/16—Details, e.g. jaws, jaw attachments
Definitions
- the invention relates to a toggle lever tensioning device, in particular for use in body construction in the automotive industry.
- Toggle clamps for use in body construction in the automotive industry are already known in various constructions. Some such toggle clamps are for example in the German utility model 93 11 132 U1 and shown and described in EP 0 636 449 B1. Especially Bodywork in the automotive industry strives to save weight through the use of light metals. That's why you go increasingly in addition, the housing, i.e. clamping head and cylinder, of toggle lever clamping devices no longer - as before - from steel, but from light metal alloys, especially aluminum alloys. Such Lighter toggle clamps are used especially in mobile systems used. Because when clamping, very large reaction forces from the clamping head must be included, exists when using light metal the risk of deformation of the housing walls, especially after some operating time, so that no precise clamping position and no defined Clamping forces are more to be transferred.
- a toggle lever tensioning device is also included a clamping head and with an adjoining one in axial extension Cylinder previously known, in which presumably an alternating on both sides piston to be acted upon by pressure medium pressure is sealingly guided, the cylinder and a cavity with a piston rod of the clamping head extends axially, with at the free end of the piston rod a toggle joint assembly is attached to one on one Side of the clamping head arranged clamping arm or one on both end sections a fork-shaped clamping arm mounted on an axle is coupled, the toggle joint arrangement in the clamping head on one axis fixed to the housing.
- a kind of support plate is also provided, which is arranged resiliently or resiliently.
- the invention has for its object a toggle lever tensioning device, especially for use in body construction in the motor vehicle industry, in which also when using light metal or light metal alloys for the clamping head and / or the cylinder and z. B. despite the arrangement of only one clamping arm on one side of the clamping head and therefore less favorable Force transmission does not lead to harmful deformations on the clamping head or its storage can come, the construction for the radial and Thrust bearing should be kept simple.
- the housing-fixed pivot axis of the toggle joint arrangement is which also the z. B. drives one-sided clamping arm, axially and radially supported by the same rolling elements, so that through one and the same Rolling element bearings provide radial and axial mounting of the housing-fixed Swivel axis is reached.
- the axially and radially occurring Power components reliably and without deformation in the walls of the Clamping head directed, and without it to tilt or to one
- the toggle joint assembly becomes stiff.
- Support plate and Fixed stop can be made of hardened steel, if necessary also Ceramic material, exist and be designed accordingly large, so that the surface pressure can be kept low in this area.
- Ceramic material it does happen this does not result in damaging deformations of the clamping head walls.
- the support plate is arranged in a housing wall of the clamping head and held by a screw screwed into the support plate from the outside.
- Claim 6 describes a toggle lever tensioning device in which the fixed stop can also be locked by one or more screws which act on the fixed stop from the outside, optionally also adjustable by screws or the like. This fixed stop enables precise tensioner adjustment, so that a certain amount of wear that occurs after some time can be compensated for by adjustment.
- Reference number 1 denotes a cylinder, in which alternately on both sides a z. B. piston 2 to be acted upon by compressed air and is performed sealing.
- a piston rod 3 is connected, which at its end with a toggle joint arrangement 4 is provided.
- This toggle joint arrangement 4 has, inter alia, a swivel bracket 5 which is around a toggle joint pin 7 can be pivoted in the direction A or B by a limited amount is.
- the swivel bracket 5 is through a hole in the toggle joint pin 7 pivotally arranged and has at its other end a further hole through which a hinge pin 8 engages the two end portions of the link plates 9 and 10 are also pivotable are arranged with one hole each.
- These link plates 9 and 10 are integrally connected to one another.
- Clamping head 12 connects to cylinder 1, the parts of the piston rod 3 and the toggle joint arrangement 4 with its pivot axes 7, 8 takes up and in the wall of an axis 11 is mounted stationary.
- the axis 11 is in the embodiments shown in the drawing led out from one side of the housing of the clamping head 12 and has the illustrated embodiment on one side a tension arm 13.
- the axis 11 can be removed from the housing at both end sections of the chuck 12 to be led out and on these two end sections carry a fork-shaped clamping arm that has a central or has off-center clamping part.
- the axis 11 is through at both ends each have a separate radial bearing 14 and an axial bearing 15. On the opposite A similar arrangement is made on the side of the axis 11.
- the bearings 14 and 15 are designed as roller bearings, in the present case as needle bearings. so that on the one hand high forces in the axial and radial direction with large Ease of movement can be included.
- FIG. 1 there is a support plate in the area of the top dead center position 16 arranged from hardened steel or a suitable ceramic material, which is held by at least one screw 17.
- the screw 17 can be actuated by an externally accessible bore in the clamping head 12 and engages in the support plate 16 to hold it. In the field of the toggle joint arrangement 4 is supported against this, so that wall parts of the clamping head 12 cannot be deformed.
- a fixed stop 18 in the form of a Plate provided, also by at least one screw 19 or the like is supported.
- the fixed stop 18 serves for an exact tension adjustment and can also be made of hardened steel or a ceramic Material.
- the screw 19 or the like can be adjusted and setting the fixed stop 18 enable.
- This embodiment differs differs from the above-described embodiment in that the support plate 16 against a spring element 20, for example by one or more disc springs, is arranged resiliently. In this way, the support plate 16 dodge something so that when the top dead center is reached the toggle joint literally z. B. clicks into place. By the screw 17, the bias of the spring element 20 infinitely adjust and lock.
- - disc springs can also form one or more compression springs made of helical compression springs or a polyurethane block designed as a plastic block form the spring element 20. In this case the plastic block pre-pressed to largely eliminate hysteresis and to to achieve the required elasticity and shore hardness.
- Both by the support plate 16 and by the fixed stop 18 can determine the exact angular position of the toggle joint at which the predetermined Tension is achieved in the area of top dead center. Moreover wear and / or tolerances are compensated.
- Rolling elements 21 arranged at an even angular distance from one another are provided.
- These rolling elements are in the form of barrels or cylindrical Rolling bodies formed.
- the rolling elements 21 engage in a formally adapted Recess 22 in the wall of the clamping head 12.
- This recess can have a radial depression in the relevant wall of the clamping head Be 12. This forms the radial bearing of the axis 11.
- the Rolling elements 21 lie with their outwardly facing end faces 23 a collar of the recess 22 or the like provided here.
- the rolling elements can not only on their in the recess 22nd rolling surfaces can be slightly barrel-shaped or spherical, but also on their faces. This is necessary for the functioning as However, axial and radial bearings are not essential.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
- Clamps And Clips (AREA)
- Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
- Mechanical Control Devices (AREA)
Description
- Fig. 1
- eine Kniehebelspannvorrichtung im Axiallängsschnitt;
- Fig. 2
- eine Draufsicht zur Fig. 1, teils im Schnitt, nach der Linie II - II, wobei allerdings die Axial- und Radiallagerung dem Stand der Technik entspricht;
- Fig. 3
- eine Einzelheit aus Fig. 1, in größerem Maßstab und
- Fig. 4
- eine weitere Ausführungsform der Erfindung.
- 1
- Zylinder
- 2
- Kolben
- 3
- Kolbenstange
- 4
- Kniehebelgelenkanordnung
- 5
- Schwenklasche
- 6
- -
- 7
- Kniehebelgelenkbolzen, Schwenkachse
- 8
- ,, , ,, , Gelenkbolzen
- 9
- Gelenklasche
- 10
- ,,
- 11
- Achse
- 12
- Spannkopf
- 13
- Spannarm
- 14
- Radiallager
- 15
- Axiallager
- 16
- Stützplatte
- 17
- Schraube
- 18
- Festanschlag
- 19
- Schraube
- 20
- Federelement
- 21
- Wälzkörper
- 22
- Aussparung
- 23
- Stirnseite
- 24
- Stirnseite
- 25
- Seitenwand
- 26
- "
- A
- Schwenkrichtung der Schwenklasche 5
- B
- ,,
Claims (13)
- Kniehebelspannvorrichtung, insbesondere zur Verwendung im Karosseriebau der Kfz-Industrie, mit einem Spannkopf (12) und mit einem sich in axialer Verlängerung daran anschließenden Zylinder (1), in dem ein abwechselnd beidseitig durch Druckmitteldruck, insbesondere durch Luftdruck, zu beaufschlagender Kolben (2) längsverschieblich und dichtend geführt ist, der mit seiner Kolbenstange (3) den Zylinder (1) und einen Hohlraum des Spannkopfes (12) axial durchgreift, wobei am freien Ende der Kolbenstange (3) eine Kniehebelgelenkanordnung (4) befestigt ist, die mit einem auf einer Seite des Spannkopfes (12) angeordneten Spannarm (13) oder einem auf beiden Endabschnitten einer Achse (11) gelagerten, gabelförmigen Spannarm gekuppelt ist, wobei die Kniehebelgelenkanordnung (4) in dem Spannkopf (12) an einer gehäusefesten Achse (11) gelagert ist, mit einem Anschlag für den Spannarm am Gehäuse in der Spannstellung, dadurch gekennzeichnet, daß auf dem betreffenden Längenabschnitt der Achse (11) über den Umfang derselben mit vorzugsweise gleichmäßigem Winkelabstand zueinander angeordnete Wälzkörper (21) vorgesehen sind, die in eine formmäßig angepaßte Aussparung (22) der Wandung des Spannkopfes (12) eingreifen und dadurch die radiale Lagerung der Achse (11) bilden, während sie mit ihren jeweils nach außen weisenden Stirnseiten (23) gegen einen hier vorgesehenen Kragen der Aussparung (22) oder dergleichen anliegen und auf ihrer diametral gegenüberliegenden Stirnseite (24) gegen die dem betreffenden Längenabschnitt der Achse (11) zugekehrte Seitenwand (25 bzw. 26) der zugehörigen Gelenklasche (9 bzw. 10) anliegen und dadurch das Axiallager bilden, und auf der der gehäusefesten Achse (11) gegenüberliegenden Seite des Spannkopfes (12) im Bereich des Totpunktes eine aus Stahl oder aus Keramik bestehende Stützplatte (16) angeordnet ist, gegen die sich die Kniehebelgelenkanordnung (4) im Bereich des oberen Totpunktes abstützt.
- Kniehebelspannvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Wälzkörper (21) als Tonnen ausgebildet sind.
- Kniehebelspannvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Wälzkörper (21) zylindrisch ausgebildet sind.
- Kniehebelspannvorrichtung nach Anspruch 1 oder einem der darauffolgenden Ansprüche, dadurch gekennzeichnet, daß die Wälzkörper (21) an ihren Stirnseiten leicht tonnenförmig oder ballig ausgeführt sind.
- Kniehebelspannvorrichtung nach Anspruch 1 oder einem der darauffolgenden Ansprüche, dadurch gekennzeichnet, daß die Stützplatte (16) in einer Aussparung des Spannkopfes (12) angeordnet und von außen durch mindestens eine Schraube (17) einstellbar und arretierbar gehalten ist.
- Kniehebelspannvorrichtung nach Anspruch 1 oder einem der darauffolgenden Ansprüche, dadurch gekennzeichnet, daß auf der der Stützplatte (16) gegenüberliegenden Seite am Spannkopf (12) ein Festanschlag (18) aus Stahl, insbesondere aus gehärtetem Stahl oder aus Keramik oder dgl., für genaue Spanneinstellung angeordnet ist, der mit der Kniehebelgelenkanordnung (4) ebenfalls zusammenwirkt, und daß der Festanschlag (18) sich an der Innenwandung des Spannkopfes (12) abstützt und durch mindestens eine von außen zugängliche Schraube (19) gehalten, vorzugsweise einstell- und arretierbar, ausgebildet und angeordnet ist.
- Kniehebelspannvorrichtung nach Anspruch 1 oder einem der darauffolgenden Ansprüche, dadurch gekennzeichnet, daß die Stützplatte (16) federnd oder federelastisch angeordnet ist.
- Kniehebelspannvorrichtung nach Anspruch 1 oder einem der darauffolgenden Ansprüche, dadurch gekennzeichnet, daß die Stützplatte (16) gegen ein Federelement (20) - gegebenenfalls mit voreinstellbarer Federspannung - gelagert ist.
- Kniehebelspannvorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß das Federelement (20) wenigstens eine Tellerfeder, vorzugsweise ein Tellerfederpaket, ist.
- Kniehebelspannvorrichtung nach Anspruch 8 oder 9, dadurch gekennzeichnet, daß das Federelement (20) aus Kunststoff besteht.
- Kniehebelspannvorrichtung nach Anspruch 1 oder einem der darauffolgenden Ansprüche, dadurch gekennzeichnet, daß sowohl der Spannkopf (12) als auch der Zylinder (1) aus einer Leichtmetall-Legierung, insbesondere aus einer Aluminiumlegierung, bestehen.
- Kniehebelspannvorrichtung nach Anspruch 1 oder einem der Ansprüche 2 bis 10, dadurch gekennzeichnet, daß der Spannkopf (12) und der Zylinder (1) aus Stahl bestehen.
- Kniehebelspannvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Wälzkörper (21) keglig ausgebildet sind.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19751950A DE19751950C1 (de) | 1997-11-24 | 1997-11-24 | Kniehebelspannvorrichtung, insbesondere zur Verwendung im Karosseriebau der Kfz-Industrie |
| DE19751950 | 1997-11-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0917932A1 EP0917932A1 (de) | 1999-05-26 |
| EP0917932B1 true EP0917932B1 (de) | 2003-02-19 |
Family
ID=7849619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98119088A Expired - Lifetime EP0917932B1 (de) | 1997-11-24 | 1998-10-09 | Kniehebelspannvorrichtung, insbesondere zur Verwendung im Karosseriebau der Kfz-Industrie |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6076816A (de) |
| EP (1) | EP0917932B1 (de) |
| AT (1) | ATE232773T1 (de) |
| DE (2) | DE19751950C1 (de) |
| ES (1) | ES2193458T3 (de) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3683447B2 (ja) * | 1999-10-15 | 2005-08-17 | Smc株式会社 | クランプ装置 |
| EP1179394A3 (de) * | 2000-08-03 | 2003-08-27 | Norgren Automotive Inc. | Selbsthemmende, angetriebene Spannvorrichtung mit Kniehebel-Mechanismus |
| US6557841B2 (en) * | 2001-06-26 | 2003-05-06 | Norgren Automotive, Inc. | Over-center power clamp toggle mechanism |
| US6565074B1 (en) * | 2001-06-26 | 2003-05-20 | Norgren Automotive, Inc. | Rotary clamp having an adjustable pre-stop |
| ITMI20020683A1 (it) | 2002-04-02 | 2003-10-02 | Luciano Migliori | Dispositivo di pinzatura per saldature laser |
| US6988440B2 (en) * | 2002-07-18 | 2006-01-24 | Phd, Inc. | Rotary actuator assembly |
| US7815176B2 (en) | 2003-09-11 | 2010-10-19 | Phd, Inc. | Lock mechanism for pin clamp assembly |
| DE102004007468A1 (de) * | 2004-02-13 | 2005-09-01 | De-Sta-Co Metallerzeugnisse Gmbh | Spannvorrichtung |
| US7516948B2 (en) * | 2004-04-02 | 2009-04-14 | Phd, Inc. | Pin clamp accessories |
| US7182326B2 (en) * | 2004-04-02 | 2007-02-27 | Phd, Inc. | Pin clamp |
| US7448607B2 (en) * | 2004-12-15 | 2008-11-11 | Phd, Inc. | Pin clamp assembly |
| US20070267795A1 (en) * | 2006-02-06 | 2007-11-22 | Parag Patwardhan | Pin clamp transfer assembly and method of transferring a workpiece |
| CA2690801C (en) | 2007-06-19 | 2015-05-26 | Bruce D. Mcintosh | Pin clamp assembly |
| EP2303505B1 (de) * | 2008-06-18 | 2019-02-27 | PHD, Inc. | Abstreifstiftklemme |
| DE102011110129A1 (de) * | 2011-08-15 | 2013-02-21 | De-Sta-Co Europe Gmbh | Betätigungsvorrichtung |
| ITTO20120106A1 (it) * | 2012-02-08 | 2013-08-09 | Vep Automation Srl | Apparecchiatura di bloccaggio di pezzi, particolarmente di fogli di lamiera |
| JP6997978B2 (ja) * | 2018-10-05 | 2022-01-18 | Smc株式会社 | クランプ装置 |
| CN109531206A (zh) * | 2018-12-28 | 2019-03-29 | 佛山市普拉迪数控科技有限公司 | 一种行李架加工设备 |
| DE102019121860A1 (de) * | 2019-08-14 | 2021-02-18 | Destaco Europe Gmbh | Spannvorrichtung |
Family Cites Families (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3371953A (en) * | 1967-03-16 | 1968-03-05 | Leland F. Blatt | Gripper |
| US3482831A (en) * | 1967-09-11 | 1969-12-09 | Leland F Blatt | Toggle action jaw type gripper |
| FR2296494A1 (fr) * | 1974-12-31 | 1976-07-30 | Carel Fouche Languepin | Dispositif de serrage pneumatique |
| FR2340798A1 (fr) * | 1976-02-13 | 1977-09-09 | Polymatic Sa | Tete de bridage irreversible a attelage flottant et demontage rapide |
| US4021027A (en) * | 1976-05-17 | 1977-05-03 | Blatt Leland F | Power wedge clamp with guided arm |
| FR2427179A1 (fr) * | 1978-05-29 | 1979-12-28 | Cecchi Gerard | Perfectionnements aux dispositifs de serrage a commande pneumatique |
| DE3022376C2 (de) * | 1980-06-14 | 1985-08-01 | De-Sta-Co Metallerzeugnisse Gmbh, 6000 Frankfurt | Kniehebelspannvorrichtung zum Festspannen von Werkstücken |
| US4664364A (en) * | 1986-08-15 | 1987-05-12 | Ozz Industries, Inc. | Proximity switch assembly |
| FR2618713B3 (fr) * | 1987-07-29 | 1990-03-30 | Cecchi Gerard | Dispositif de bridage |
| DE3862562D1 (de) * | 1987-10-29 | 1991-05-29 | Sta Co Mettallerzeugnisse Gmbh | Spannvorrichtung. |
| DE8715476U1 (de) * | 1987-11-22 | 1989-03-23 | De-Sta-Co Metallerzeugnisse Gmbh, 6000 Frankfurt | Spannvorrichtung |
| DE8811579U1 (de) * | 1988-09-13 | 1990-01-11 | De-Sta-Co Metallerzeugnisse Gmbh, 6000 Frankfurt | Spannvorrichtung |
| FR2639569B1 (fr) * | 1988-11-25 | 1991-01-18 | Polymatic Sa | Tete de bridage a rattrapage de jeux |
| US4905973B1 (en) * | 1989-01-11 | 1994-07-05 | John A Blatt | Power operated clamp with externally mounted adjustable clamp arm |
| DE8908288U1 (de) * | 1989-07-07 | 1989-09-21 | Tünkers, Josef Gerhard, 4030 Ratingen | Kniehebelspannvorrichtung für den Karosseriebau |
| US5201838A (en) * | 1989-09-05 | 1993-04-13 | Philippe Roudaut | Position indicator for a piston controlled robot part |
| DE4111430A1 (de) * | 1990-04-12 | 1991-10-17 | Volker Schlueter | Druckmittelbetaetigte spannvorrichtung |
| DE9005183U1 (de) * | 1990-05-07 | 1990-07-12 | Tünkers, Josef Gerhard, 4030 Ratingen | Kniehebelspannvorrichtung |
| US5072652A (en) * | 1990-11-16 | 1991-12-17 | Blatt John A | Gripping device having impact cushioning means |
| DE9016781U1 (de) * | 1990-12-12 | 1992-04-09 | De-Sta-Co Metallerzeugnisse Gmbh, 6000 Frankfurt | Spannvorrichtung |
| DE9215151U1 (de) * | 1992-05-14 | 1993-01-21 | De-Sta-Co Metallerzeugnisse Gmbh, 6000 Frankfurt | Spannvorrichtung |
| DE4236670A1 (de) * | 1992-10-30 | 1994-05-05 | Sta Co Mettallerzeugnisse Gmbh | Klemmspannvorrichtung |
| DE9311132U1 (de) * | 1993-07-26 | 1993-09-09 | Tünkers Maschinenbau GmbH, 40880 Ratingen | Kniehebelspannvorrichtung für den Karosseriebau |
| DE29504267U1 (de) * | 1995-03-13 | 1995-06-29 | Tünkers Maschinenbau GmbH, 40880 Ratingen | Kniehebelspannvorrichtung, insbesondere zur Verwendung im Karosseriebau der Kfz-Industrie |
| DE29513586U1 (de) * | 1995-08-24 | 1995-12-07 | Tünkers Maschinenbau GmbH, 40880 Ratingen | Kniehebelspannvorrichtung für den Karosseriebau |
| DE19616441C1 (de) * | 1996-04-25 | 1997-06-26 | Tuenkers Maschinenbau Gmbh | Kniehebelspannvorrichtung für den Karosseriebau |
-
1997
- 1997-11-24 DE DE19751950A patent/DE19751950C1/de not_active Expired - Fee Related
-
1998
- 1998-10-09 AT AT98119088T patent/ATE232773T1/de not_active IP Right Cessation
- 1998-10-09 ES ES98119088T patent/ES2193458T3/es not_active Expired - Lifetime
- 1998-10-09 DE DE59807238T patent/DE59807238D1/de not_active Expired - Fee Related
- 1998-10-09 EP EP98119088A patent/EP0917932B1/de not_active Expired - Lifetime
- 1998-11-24 US US09/199,007 patent/US6076816A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US6076816A (en) | 2000-06-20 |
| ES2193458T3 (es) | 2003-11-01 |
| DE19751950C1 (de) | 1999-03-04 |
| ATE232773T1 (de) | 2003-03-15 |
| DE59807238D1 (de) | 2003-03-27 |
| EP0917932A1 (de) | 1999-05-26 |
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