EP0080564A2 - Torque wrench - Google Patents

Torque wrench Download PDF

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Publication number
EP0080564A2
EP0080564A2 EP82108087A EP82108087A EP0080564A2 EP 0080564 A2 EP0080564 A2 EP 0080564A2 EP 82108087 A EP82108087 A EP 82108087A EP 82108087 A EP82108087 A EP 82108087A EP 0080564 A2 EP0080564 A2 EP 0080564A2
Authority
EP
European Patent Office
Prior art keywords
torque wrench
screwing tool
torque
pulse generator
spray gun
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.)
Withdrawn
Application number
EP82108087A
Other languages
German (de)
French (fr)
Other versions
EP0080564A3 (en
Inventor
Klaus Gerlach
Heinz Schönberger
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.)
Prosperas GmbH
Original Assignee
Saltus Werk Max Forst GmbH
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 Saltus Werk Max Forst GmbH filed Critical Saltus Werk Max Forst GmbH
Publication of EP0080564A2 publication Critical patent/EP0080564A2/en
Publication of EP0080564A3 publication Critical patent/EP0080564A3/en
Withdrawn legal-status Critical Current

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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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/15—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers having a mechanism to mark the work when the selected torque is applied to the work

Definitions

  • the invention relates to a torque wrench with a locking device which is arranged between the actuating handle and the screwing tool and which, when a certain torque is exceeded, enters the release position.
  • the object of the invention is based on the object of designing a torque wrench of the type required so that only the screw connections produced with the required torque receive an optical marking.
  • This object is achieved in that in the area of the locking device a pulse generator actuated upon transition to the free position and in the area of the screwing tool carrier a paint spray gun controlled by the pulse generator is arranged, the spray jet of which is directed into the attack area of the screwing tool.
  • a generic torque wrench of increased utility value is specified. It is now ensured that only the screw connection that has been generated by means of the specific torque is marked. If the corresponding torque is exceeded, it is in the area of the locking device intended pulse generator actuated. This in turn controls the paint spray gun provided on the tool carrier, which generates the color marking on the screw connection. If the torque is not reached, the screw connection is not color-coded. It is possible to retrofit torque wrenches with such a device.
  • the spray gun is arranged coaxially with the screwing tool and is directed with its opening into the screwing tool nut.
  • the color marking then appears directly on the screw connection itself.
  • the paint spray jet passes through the hollow nut.
  • the subsequent equipping of a torque wrench is favored in that the spray gun sits on an angle piece of the screwing tool carrier.
  • the structure of the screw tool carrier does not need to be changed.
  • the elbow is fixed by simply clamping it to the screw tool carrier.
  • the spray gun is equipped with an adjustment device for the spreading width of the spray jet.
  • the size of the color markings can be varied.
  • the torque wrench has an actuating handle 1, which starts from a thickened head 2.
  • the head 2 supports a pivoting tool carrier arm 4 around a pivot pin 3.
  • the latter carries a ratchet head 5 which can be fitted with a nut 6 in a known manner.
  • the latter is hollow.
  • an angle piece 7 is clamped on.
  • one angle leg 7 ' engages around the screwing tool carrier arm 4 like a jaw.
  • the other angle leg 7 "holds a paint spray gun 8.
  • the latter is arranged coaxially with the screwing tool in such a way that the opening 9 is directed into the screwing tool nut 6.
  • the connector 10 is connected to a paint line 13.
  • a spray air line 14 leads to the connector 11, and a control air line 15 extends from the connector 12.
  • These three hose lines 13, 14 and 15 pass through a housing 16 fastened to the actuating handle head 2 and are covered from there by a protective hose 17.
  • the latter ends in a connecting sleeve 18, which in turn is assigned to a switch box 19.
  • the control box 19 is the carrier of a paint container 20. Both a compressed air line 21 and a paint line 22 open into these.
  • the control box 19 receives the control impulse from a pulse generator 24 fixed in the housing 16 by means of the screw 23. Its switch button 25 lies within the movement path of the screw-tool carrier arm 4 '.
  • an adjusting device is provided in the actuating handle 1. This includes a pointer 26 which interacts with a scale 27.
  • the screwing tool carrier 4 kinks into the position shown in broken lines in FIG. 1 when a specific torque is exceeded.
  • the pulse generator housed in the area of the locking device in the housing 16 is actuated by the screw tool carrier arm 4 '. This gives the control box 19 a pulse. From here, the paint spray gun 8 is controlled such that a spray jet S passes through the nut 6 and reaches the screw connection.
  • the paint spray gun 8 is equipped with an adjusting device. By turning the adjusting knob 28, the spread of the spray jet S can be increased or decreased.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Nozzles (AREA)

Abstract

The invention relates to a torque wrench having a locking means which is arranged between operating handle (1) and screwing tool and which comes into the floating position when a given torque is exceeded, and has as its object the construction of this type of torque wrench in such a way that only the screwed connections produced with the required torque are visually marked, which is achieved in a structurally advantageous manner by arranging, in the region of the locking means, a pulse generator (24) which is actuated upon the change to the floating position and, in the region of the screwing- tool support (4), a paint spray gun (8) which is controlled by the pulse generator (24) and whose spray jet is directed into the region of application of the screwing tool. <IMAGE>

Description

Die Erfindung betrifft einen Drehmomentschlüssel mit einer zwischen Betätigungshandhabe und Schraubwerkzeug angeordneter, beim Überschreiten eines bestimmten Drehmoments in Freigangstellung tretender Sperreinrichtung.The invention relates to a torque wrench with a locking device which is arranged between the actuating handle and the screwing tool and which, when a certain torque is exceeded, enters the release position.

Es ist in der Serienfertigung bekannt, die mittels eines bestimmten Drehmoments hergestellten Schraubverbindungen optisch zu markieren. Dies geschieht durch Farbauftrag mittels eines Pinsels. Dabei kann es jedoch geschehen, daß diese optischen Markierungen auch irrtümlich bei Schraubverbindungen vorgesehen werden, auf die noch nicht das nötige Drehmoment ausgeübt wurde.It is known in series production to optically mark the screw connections produced by means of a certain torque. This is done by applying paint using a brush. However, it can happen that these optical markings are also erroneously provided for screw connections to which the necessary torque has not yet been exerted.

Dem Gegenstand der Erfindung liegt die Aufgabe zugrunde, einen Drehmomentschlüssel der vorausgesetzten Art so auszugestalten, daß nur die mit dem erforderlichen Drehmoment hergestellten Schraubverbindungen eine optische Markierung erhalten.The object of the invention is based on the object of designing a torque wrench of the type required so that only the screw connections produced with the required torque receive an optical marking.

Gelöst wird diese Aufgabe dadurch, daß im Bereich der Sperreinrichtung ein bei Übertritt in die Freigangstellung betätigter Impulsgeber und im Bereich des Schraubwerkzeugträgers eine vom Impulsgeber gesteuerte Farbspritzpistole angeordnet ist, deren Spritzstrahl in den Angriffsbereich des Schraubwerkzeugs gerichtet ist.This object is achieved in that in the area of the locking device a pulse generator actuated upon transition to the free position and in the area of the screwing tool carrier a paint spray gun controlled by the pulse generator is arranged, the spray jet of which is directed into the attack area of the screwing tool.

Zufolge derartiger Ausgestaltung ist ein gattungsgemäßer Drehmomentschlüssel von erhöhtem Gebrauchswert angegeben. Es ist nun gewährleistet, daß nur die Schraubverbindung markiert wird, die mittels des bestimmten Drehmoments erzeugt wurde. Bei Überschreiten des entsprechenden Drehmoments wird der im Bereich der Sperreinrichtung vorgesehene Impulsgeber betätigt. Dieser steuert seinerseits die am Werkzeugträger vorgesehene Farbspritzpistole, die an der Schraubverbindung die Farbmarkierung erzeugt. Wird das Drehmoment nicht erreicht, erhält die Schraubverbindung auch keine Farbmarkierung. Es ist möglich, Drehmomentschlüssel nachträglich mit einer solchen Einrichtung auszurüsten.As a result of such an embodiment, a generic torque wrench of increased utility value is specified. It is now ensured that only the screw connection that has been generated by means of the specific torque is marked. If the corresponding torque is exceeded, it is in the area of the locking device intended pulse generator actuated. This in turn controls the paint spray gun provided on the tool carrier, which generates the color marking on the screw connection. If the torque is not reached, the screw connection is not color-coded. It is possible to retrofit torque wrenches with such a device.

Eine vorteilhafte Weiterbildung ist darin zu sehen, daß die Spritzpistole koaxial zum Schraubwerkzeug angeordnet und mit ihrer Mündungsöffnung in die Schraubwerkzeug-Nuß gerichtet ist. Die Farbmarkierung erscheint dann unmittelbar auf der Schraubverbindung selbst. Der Farbspritzstrahl tritt bei durch die hohl ausgebildete Nuß hindurch.An advantageous further development can be seen in the fact that the spray gun is arranged coaxially with the screwing tool and is directed with its opening into the screwing tool nut. The color marking then appears directly on the screw connection itself. The paint spray jet passes through the hollow nut.

Das nachträgliche Ausrüsten eines Drehmomentschlüssels ist dadurch begünstigt, daß die Spritzpistole an einem Winkelstück des Schraubwerkzeugträgers sitzt. Der Aufbau des Schraubwerkzeugträgers braucht nicht abgeändert zu werden. Das Festlegen des Winkelstücks geschieht durch ledigliches Festklemmen desselben an dem Schraubwerkzeugträger.The subsequent equipping of a torque wrench is favored in that the spray gun sits on an angle piece of the screwing tool carrier. The structure of the screw tool carrier does not need to be changed. The elbow is fixed by simply clamping it to the screw tool carrier.

Ein ungewolltes Auslösen des Impulsgebers ist dadurch verhindert, daß der Impulsgeber von dem in die Freigangstellung einknickenden Schraubwerkzeugträger-Arm beaufschlagt ist. Dieses Einknicken geschieht jedoch nur dann, wenn das bestimmte Drehmoment überschritten wird.An unwanted triggering of the pulse generator is prevented in that the pulse generator is acted upon by the screwing tool carrier arm that buckles into the free position. However, this buckling only occurs when the specific torque is exceeded.

Schließlich erweist es sich noch als günstig, daß die Spritzpistole mit einer Einstellvorrichtung für die Streubreite des Spritzstrahles ausgestattet ist. Die Größe der Farbmarkierungen kann dadurch variiert werden.Finally, it proves to be favorable that the spray gun is equipped with an adjustment device for the spreading width of the spray jet. The size of the color markings can be varied.

Nachstehend wird ein Ausführungsbeispiel der Erfindung anhand der Fig. 1 und 2 erläutert. Es zeigt:

  • Fig. 1 eine Draufsicht auf einen mit Impulsgeber und Farbspritzpistole ausgestatteten Drehmomentschlüssel mit zugehörigem Schaltkasten und Farbbehälter und
  • Fig. 2 eine Seitenansicht des Drehmomentschlüssels mit in Draufsicht dargestelltem Schaltkasten.
An embodiment of the invention is explained below with reference to FIGS. 1 and 2. It shows:
  • Fig. 1 is a plan view of a torque wrench equipped with pulse generator and paint spray gun with associated control box and paint container and
  • Fig. 2 is a side view of the torque wrench with the switch box shown in plan view.

Der Drehmomentschlüssel besitzt eine Betätigungshandhabe 1, die von einem verdickt ausgebildeten Kopf 2 ausgeht. In diesem ist die nicht im einzelnen dargestellte Sperreinrichtung untergebracht. Der Kopf 2 lagert um einen Gelenkzapfen 3 einen Schraubwerkzeugträger-Arm 4. An seinem freien Ende trägt dieser einen Ratschenkopf 5, welcher in bekannter Weise mit einer Nuß 6 bestückbar ist. Letztere ist hohl ausgebildet.The torque wrench has an actuating handle 1, which starts from a thickened head 2. In this the locking device is not shown in detail. The head 2 supports a pivoting tool carrier arm 4 around a pivot pin 3. At its free end, the latter carries a ratchet head 5 which can be fitted with a nut 6 in a known manner. The latter is hollow.

An der Übergangsstelle zwischen Ratschenkopf 5 und Schraubwerkzeugträger-Arm 4 ist ein Winkelstück 7 aufgeklemmt. Hierzu umgreift der eine Winkelschenkel 7' backenartig den Schraubwerkzeugträger-Arm 4. Der andere Winkelschenkel 7" haltert eine Farbspritzpistole 8. Letztere ist koaxial zum Schraubwerkzeug angeordnet derart, daß die Mündungsöffnung 9 in die Schraubwerkzeug-Nuß 6 gerichtet ist.At the transition point between the ratchet head 5 and the tool holder arm 4, an angle piece 7 is clamped on. For this purpose, one angle leg 7 'engages around the screwing tool carrier arm 4 like a jaw. The other angle leg 7 "holds a paint spray gun 8. The latter is arranged coaxially with the screwing tool in such a way that the opening 9 is directed into the screwing tool nut 6.

An der Farbspritzpistole sind drei Anschlußstücke 10,11 und 12 vorgesehen. Das Anschlußstück 10 steht in Verbindung mit einer Farbleitung 13. Zu dem Anschlußstück 11 führt eine Spritzluftleitung 14, und von dem Anschlußstück 12 geht eine Steuerluftleitung 15 aus. Diese drei Schlauchleitungen 13,14 und 15 durchsetzen ein an dem Betätigungshandhaben-Kopf 2 befestigtes Gehäuse 16 und sind von dort aus von einem Schutzschlauch 17 ummantelt. Letzterer endet in einer Anschlußmuffe 18, die ihrerseits einem Schaltkasten 19 zugeordnet ist. Der Schaltkasten 19 ist Träger eines Farbbehälters 20. In diesen münden sowohl eine Druckluftleitung 21 als auch eine Farbleitung 22.Three connectors 10, 11 and 12 are provided on the paint spray gun. The connector 10 is connected to a paint line 13. A spray air line 14 leads to the connector 11, and a control air line 15 extends from the connector 12. These three hose lines 13, 14 and 15 pass through a housing 16 fastened to the actuating handle head 2 and are covered from there by a protective hose 17. The latter ends in a connecting sleeve 18, which in turn is assigned to a switch box 19. The control box 19 is the carrier of a paint container 20. Both a compressed air line 21 and a paint line 22 open into these.

Den Steuerungsimpuls erhält der Schaltkasten 19 durch einen im Gehäuse 16 mittels der Schraube 23 fixierten Impulsgeber 24. Dessen Schaltknopf 25 liegt innerhalb der Bewegungsbahn des Schraubwerkzeugträger-Armes 4'.The control box 19 receives the control impulse from a pulse generator 24 fixed in the housing 16 by means of the screw 23. Its switch button 25 lies within the movement path of the screw-tool carrier arm 4 '.

Zwecks Einstellung eines Drehmoments ist in der Betätigungshandhabe 1 eine Verstellvorrichtung vorgesehen. Diese enthält u.a. einen Zeiger 26, der mit einer Skala 27 zusammenwirkt.In order to set a torque, an adjusting device is provided in the actuating handle 1. This includes a pointer 26 which interacts with a scale 27.

Wird der Drehmomentschlüssel mit seiner Nuß 6 auf einen Schraubenkopf oder eine Mutter aufgesetzt und die Schraubverbindung hergestellt, so knickt bei Überschreiten eines bestimmten Drehmoments der Schraubwerkzeugträger 4 in die in Fig. 1 strichpunktiert dargestellte Lage ein. Dabei wird der im Bereich der Sperreinrichtung im Gehäuse 16 untergebrachte Impulsgeber von dem Schraubenwerkzeugträger-Arm Arm 4' betätigt. Dadurch erhält der Schaltkasten 19 einen Impuls Von hier aus wird die Farbspritzpistole 8 gesteuert derart, daß ein Spritzstrahl S die Nuß 6 durchsetzt und auf die Schraubverbindung gelangt.If the torque wrench with its nut 6 is placed on a screw head or a nut and the screw connection is established, the screwing tool carrier 4 kinks into the position shown in broken lines in FIG. 1 when a specific torque is exceeded. The pulse generator housed in the area of the locking device in the housing 16 is actuated by the screw tool carrier arm 4 '. This gives the control box 19 a pulse. From here, the paint spray gun 8 is controlled such that a spray jet S passes through the nut 6 and reaches the screw connection.

Zwecks Variation der Streubreite des Spritzstrahles S ist die Farbspritzpistole 8 mit einer Einstellvorrichtung ausgestattet. Durch Drehen deren Einstellknopfes 28 kann die Streubreite des Spritzstrahles S vergrößert oder verringert werden.For the purpose of varying the spread of the spray jet S, the paint spray gun 8 is equipped with an adjusting device. By turning the adjusting knob 28, the spread of the spray jet S can be increased or decreased.

Alle in der Beschreibung erwähnten und in der Zeichnung dargestellten neuen Merkmale sind erfindungswesentlich, auch soweit sie in den Ansprüchen nicht ausdrücklich beansprucht sind.All the new features mentioned in the description and shown in the drawing are essential to the invention, even if they are not expressly claimed in the claims.

Claims (5)

1. Drehmomentschlüssel mit einer zwischen Betätigungshandhabe und Schraubwerkzeug angeordneter, bei Überschreiten eines bestimmten Drehmoments in Freigangstellung tretender Sperreinrichtung, dadurch gekennzeichnet, daß im Bereich der Sperreinrichtung ein bei Übertritt in die Freigangstellung betätigter Impulsgeber (24) und im Bereich des Schraubwerkzeugträgers (4) eine vom Impulsgeber (24) gesteuerte Farbspritzpistole (8) angeordnet ist, deren Spritzstrahl (S) in den Angriffsbereich des Schraubwerkzeugs gerichtet ist.1. Torque wrench with a locking device arranged between the actuating handle and screwing tool, when a certain torque is exceeded in the release position, characterized in that in the area of the locking device a pulse generator (24) actuated upon transition to the release position and in the area of the screwing tool carrier (4) one from Pulse generator (24) controlled paint spray gun (8) is arranged, the spray jet (S) of which is directed into the area of attack of the screwing tool. 2. Drehmomentschlüssel nach Anspruch 1, dadurch gekennzeichnet, daß die Spritzpistole (8) koaxial zum Schraubwerkzeug (Ratschenkopf 5) angeordnet und mit ihrer Mündungsöffnung in die Schraubwerkzeug-Nuß (6) gerichtet ist.2. Torque wrench according to claim 1, characterized in that the spray gun (8) is arranged coaxially to the screwing tool (ratchet head 5) and is directed with its opening into the screwing tool nut (6). 3. Drehmomentschlüssel nach Anspruch 1, dadurch gekennzeichnet, daß die Spritzpistole (8) an einem Winkelstück (7) des Schraubwerkzeugträgers (4) sitzt.3. Torque wrench according to claim 1, characterized in that the spray gun (8) on an angle piece (7) of the screw tool carrier (4) is seated. 4. Drehmomentschlüssel nach Anspruch 1, dadurch gekennzeichnet, daß der Impulsgeber (24) von dem in die Freigangstellung einknickenden Schraubwerkzeugträger-Arm (4') beaufschlagt ist.4. Torque wrench according to claim 1, characterized in that the pulse generator (24) is acted upon by the screwing tool carrier arm (4 ') which buckles into the free-movement position. 5. Drehmomentschlüssel nach Anspruch 1, dadurch gekennzeichnet, daß die Spritzpistole (8) mit einer Einstellvorrichtung für die Streubreite des Spritzstrahles (S) ausgestattet ist.5. Torque wrench according to claim 1, characterized in that the spray gun (8) is equipped with an adjusting device for the spread of the spray jet (S).
EP82108087A 1981-11-30 1982-09-02 Torque wrench Withdrawn EP0080564A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8134888U 1981-11-30
DE19818134888 DE8134888U1 (en) 1981-11-30 1981-11-30 TORQUE WRENCH

Publications (2)

Publication Number Publication Date
EP0080564A2 true EP0080564A2 (en) 1983-06-08
EP0080564A3 EP0080564A3 (en) 1984-05-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP82108087A Withdrawn EP0080564A3 (en) 1981-11-30 1982-09-02 Torque wrench

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DE (1) DE8134888U1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4231265A1 (en) * 1992-09-18 1994-03-24 Audi Ag Colour applicator for torque wrench - has storage tank for paint formed as spray box which is insertable in retainer having two clamp stirrups to form receptor for tank
WO2016146367A1 (en) * 2015-03-19 2016-09-22 Bayerische Motoren Werke Aktiengesellschaft Assembly tool comprising a marking function and method for forming markings in fastening elements by means of an assembly tool

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3009371A (en) * 1960-05-11 1961-11-21 Albert O Hines Automatic work marking means for predetermined torque release wrench
DE1603760A1 (en) * 1966-12-03 1971-01-14 Daimler Benz Ag Torque wrench
US3693483A (en) * 1971-04-12 1972-09-26 Oakley Butler Palmer Torque power wrench marking device
US3719111A (en) * 1971-05-27 1973-03-06 Carco Inc Marking device for torque applying tool
DE2530077A1 (en) * 1975-07-05 1977-02-03 Daimler Benz Ag Torque spanner with integral paint marker - has ratchet mechanism which actuates marking paint supply when required torque is reached

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3009371A (en) * 1960-05-11 1961-11-21 Albert O Hines Automatic work marking means for predetermined torque release wrench
DE1603760A1 (en) * 1966-12-03 1971-01-14 Daimler Benz Ag Torque wrench
US3693483A (en) * 1971-04-12 1972-09-26 Oakley Butler Palmer Torque power wrench marking device
US3719111A (en) * 1971-05-27 1973-03-06 Carco Inc Marking device for torque applying tool
DE2530077A1 (en) * 1975-07-05 1977-02-03 Daimler Benz Ag Torque spanner with integral paint marker - has ratchet mechanism which actuates marking paint supply when required torque is reached

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4231265A1 (en) * 1992-09-18 1994-03-24 Audi Ag Colour applicator for torque wrench - has storage tank for paint formed as spray box which is insertable in retainer having two clamp stirrups to form receptor for tank
WO2016146367A1 (en) * 2015-03-19 2016-09-22 Bayerische Motoren Werke Aktiengesellschaft Assembly tool comprising a marking function and method for forming markings in fastening elements by means of an assembly tool
CN107000180A (en) * 2015-03-19 2017-08-01 宝马股份公司 Installation tool with mark function and the method for setting mark in tightening member by installation tool
US10836021B2 (en) 2015-03-19 2020-11-17 Bayerische Motoren Werke Aktiengesellschaft Assembly tool comprising a marking function and method for forming markings in fastening elements by means of an assembly tool

Also Published As

Publication number Publication date
DE8134888U1 (en) 1982-04-08
EP0080564A3 (en) 1984-05-02

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