EP0331534A1 - Insulated ratchet wrench - Google Patents

Insulated ratchet wrench Download PDF

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Publication number
EP0331534A1
EP0331534A1 EP89400133A EP89400133A EP0331534A1 EP 0331534 A1 EP0331534 A1 EP 0331534A1 EP 89400133 A EP89400133 A EP 89400133A EP 89400133 A EP89400133 A EP 89400133A EP 0331534 A1 EP0331534 A1 EP 0331534A1
Authority
EP
European Patent Office
Prior art keywords
rotor
insulating
ring
covering
cap
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
EP89400133A
Other languages
German (de)
French (fr)
Other versions
EP0331534B1 (en
Inventor
Michel Geay
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.)
ATELIERS SIBILLE ET CIE
Original Assignee
ATELIERS SIBILLE ET CIE
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 ATELIERS SIBILLE ET CIE filed Critical ATELIERS SIBILLE ET CIE
Publication of EP0331534A1 publication Critical patent/EP0331534A1/en
Application granted granted Critical
Publication of EP0331534B1 publication Critical patent/EP0331534B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B25B13/00—Spanners; Wrenches
    • B25B13/46—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle
    • B25B13/461—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member
    • 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
    • B25B13/00—Spanners; Wrenches
    • B25B13/02—Spanners; Wrenches with rigid jaws
    • B25B13/06—Spanners; Wrenches with rigid jaws of socket type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G1/00—Handle constructions
    • B25G1/10—Handle constructions characterised by material or shape
    • B25G1/12—Handle constructions characterised by material or shape electrically insulating material
    • B25G1/125—Handle constructions characterised by material or shape electrically insulating material for screwdrivers, wrenches or spanners

Definitions

  • the present invention relates to an insulating ratchet wrench, of the type comprising a body, a rotor of which one end is engaged in the body, a cap covering the body, a partial covering element of the rotor such as a socket, and a electrical insulation covering these various parts.
  • the object of the invention is to produce a ratchet wrench whose insulation satisfies the above standard while having a long service life by almost absence of friction.
  • the ratchet wrench comprises an insulating ring surrounding the part of the rotor left free by said covering element and which is provided with an end flange fixed to the insulating coating of the body, and a slight clearance is reserved between this ring and the rotor.
  • the ring is advantageously manufactured by a process allowing its outer dimension to be adjusted very precisely, that is to say to a fraction of a millimeter.
  • this insulating ring can be obtained by molding, bar turning or other similar process.
  • the existence of a slight clearance between this ring and the rotor avoids any friction generating premature wear of the insulation on the rotor.
  • the insulating ratchet wrench shown in Figures 1 and 2 comprises a body 1 for manual gripping of the key, terminated by an annular part 2, a rotor 3 provided with a radial flange 4, and of which a first end 5 is received in the opening of the annular part 2.
  • the opposite end 6 of the rotor 3 is engaged in a partial covering element of the rotor 3, namely a sleeve 7 in this example.
  • a cap 8 covers the terminal part 2, and contains a ratchet mechanism known per se, not shown.
  • an electrical insulator namely on the body 1 a coating 9 which ends under the annular part 2 by a circular lip 11 forming a sort of skirt coaxial with the axis XX of the rotor 2 and the cap.
  • An insulating layer 12 also covers the sleeve 7 and ends, at the level of the lip 11, by a ring 13 inside the latter.
  • the cap 8 is coated with an insulating cap 14 which completes the isolation of the key.
  • an insulating ring 15 made of a suitable plastic material, surrounding the part 3a of the rotor 3 left free by the covering element 7, that is to say the cylindrical part 3a of the rotor 3 between its ends 5 and 6.
  • the ring 15 is provided with a terminal flange 16 in the form of a cup adapted to follow the contour of the flange 4, and consisting of a part 16a extending radially and an end ring 16b extending in the axial direction.
  • This flange 16a, 16b fits into a corresponding clearance in the insulating coating 9, to which it is fixed, substantially at the level of the circular lip 11, with a slight clearance, relative to the surface of the rotor 3.
  • annular groove 17 is formed in the outer surface of the ring 15, and this groove 17 receives a first annular bead 18 insulating and waterproof, forming part of the insulating layer 12, forming an internal projection of the collar 13.
  • the insulating cap 14 has an annular groove 19 receiving a second annular insulating bead 21 forming part of the insulator 9, with respect to which it projects internally.
  • the two cords 18 and 21 are applied in the respective grooves 15 and 19 in a sealed manner.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

Insulated ratchet wrench comprising a body (1), a rotor (3) of which one end is engaged in the body (1), a cap (8) fitted over the body, an element for partially covering the rotor such as a socket (7) and an electrical insulator (9, 12) covering these various parts, characterised in that it comprises an insulating ring (15) surrounding the section (3a) of the rotor (3) left free by the said element (7) and which is provided with an end collar (16) fixed to the insulating coating (9) of the body (1), and a slight play is retained between this ring (15) and the rotor (3). The insulating ring (15) is manufactured with a very accurate outer dimension which always remains the same, which allows it to comply with new electrical insulation standards for such a tool. <IMAGE>

Description

La présente invention a pour objet une clé à cliquet isolante, du type comprenant un corps, un rotor dont une extrémité est engagée dans le corps, un chapeau coiffant le corps, un élément de recouvrement partiel du rotor tel qu'une douille, et un isolant électrique recouvrant ces différentes pièces.The present invention relates to an insulating ratchet wrench, of the type comprising a body, a rotor of which one end is engaged in the body, a cap covering the body, a partial covering element of the rotor such as a socket, and a electrical insulation covering these various parts.

Dans une clé de ce genre, l'isolement élec­trique a jusqu'à présent été assuré par recouvrement mutuel des parties terminales de l'isolant du corps et de l'isolent de la douille du rotor, l'isolant du corps comportant à cet effet une lèvre annulaire qui vient recouvrir l'extrémité de l'isolant de la douille.In a key of this kind, electrical isolation has hitherto been ensured by mutual covering of the terminal parts of the body insulator and of the insulator from the sleeve of the rotor, the body insulator comprising for this purpose an annular lip which covers the end of the insulation of the sleeve.

Or, l'expérience montre qu'une telle clé est insuffisante pour satisfaire aux exigences de la norme NF C 18400, selon laquelle aucun courant ne doit tra­verser un outil isolant plongé dans un bain de billes d'acier et recevant pendant plusieurs minutes un cou­rant électrique de 10 kV. En effet, il s'avère que l'isolement au niveau de la lèvre terminale du revê­tement isolant du corps et de l'extrémité de l'isolant de la douille est insuffisant pour empêcher le passa­ge du courant.However, experience shows that such a key is insufficient to meet the requirements of standard NF C 18400, according to which no current must pass through an insulating tool immersed in a bath of steel balls and receiving a current for several minutes. 10 kV electric. Indeed, it turns out that the insulation at the end lip of the insulating coating of the body and of the end of the insulator of the sleeve is insufficient to prevent the passage of current.

Pour résoudre ce problème, il a déjà été proposé de garnir complètement le rotor d'un isolant solidaire de celui-ci et qui tourne donc avec lui. Mais on constate qu'à l'usage les frottements iné­vitables ainsi engendrés entraînent une usure rapide de l'isolant, qui ne remplit plus alors sa fonction et doit être rapidement remplacé.To solve this problem, it has already been proposed to completely fill the rotor with an insulator integral with it and which therefore rotates with it. However, it can be seen that in use the inevitable friction thus generated results in rapid wear of the insulation, which then no longer fulfills its function and must be quickly replaced.

L'invention a pour but de réaliser une clé à cliquet dont l'isolant satisfasse à la norme ci-dessus tout en ayant une longue durée de vie par quasi ab­sence de frottement.The object of the invention is to produce a ratchet wrench whose insulation satisfies the above standard while having a long service life by almost absence of friction.

Suivant l'invention, la clé à cliquet com­porte une bague isolante entourant la partie du rotor laissée libre par ledit élément de recouvrement et qui est munie d'une collerette terminale fixée au revêtement isolant du corps, et un léger jeu est réservé entre cette bague et le rotor.According to the invention, the ratchet wrench comprises an insulating ring surrounding the part of the rotor left free by said covering element and which is provided with an end flange fixed to the insulating coating of the body, and a slight clearance is reserved between this ring and the rotor.

La bague est avantageusement fabriquée par un procédé permettant d'ajuster sa cote extérieure de manière très précise, c'est-à-dire à une fraction de millimètre près. Ainsi cette bague isolante peut être obtenue par moulage, décolletage ou autre procédé si­milaire. De plus, l'existence d'un léger jeu entre cette bague et le rotor évite tout frottement géné­rateur d'une usure prématurée de l'isolant sur le rotor.The ring is advantageously manufactured by a process allowing its outer dimension to be adjusted very precisely, that is to say to a fraction of a millimeter. Thus this insulating ring can be obtained by molding, bar turning or other similar process. In addition, the existence of a slight clearance between this ring and the rotor avoids any friction generating premature wear of the insulation on the rotor.

Les essais ont montrés qu'une clé à cliquet pourvue de cette bague isolante satisfait à la norme NF précitée.Tests have shown that a ratchet wrench provided with this insulating ring meets the abovementioned NF standard.

D'autres particularités de l'invention appa­raitront au cours de la description qui va suivre, faite en référence au dessin annexé qui en illustre une forme de réalisation à titre d'exemple non limitatif.

  • La figure 1 est une vue mi-coupe mi-­élévation d'une forme de réalisation de la clé à cliquet isolante selon l'invention.
  • La figure 2 est une vue en perspective éclatée partielle de la clé de la figure 1, montrant notamment la bague plastique isolante.
Other particularities of the invention will appear during the description which follows, made with reference to the appended drawing which illustrates an embodiment thereof by way of nonlimiting example.
  • Figure 1 is a half-sectional mid-elevation view of an embodiment of the insulating ratchet wrench according to the invention.
  • Figure 2 is a partial exploded perspective view of the key of Figure 1, showing in particular the insulating plastic ring.

La clé à cliquet isolante représentée aux figures 1 et 2 comprend un corps 1 pour la préhension manuelle de la clé, terminé par une partie annulaire 2, un rotor 3 pourvu d'une collerette radiale 4, et dont une première extrémité 5 est reçue dans l'ouverture de la partie annulaire 2. L'extrémité opposée 6 du rotor 3 est engagée dans un élément de recouvrement partiel du rotor 3, à savoir une douille 7 dans cet exemple. Un chapeau 8 recouvre la partie terminale 2, et contient un mécanisme à cliquet connu en soi, non représenté.The insulating ratchet wrench shown in Figures 1 and 2 comprises a body 1 for manual gripping of the key, terminated by an annular part 2, a rotor 3 provided with a radial flange 4, and of which a first end 5 is received in the opening of the annular part 2. The opposite end 6 of the rotor 3 is engaged in a partial covering element of the rotor 3, namely a sleeve 7 in this example. A cap 8 covers the terminal part 2, and contains a ratchet mechanism known per se, not shown.

Ces différentes pièces sont recouvertes d'un isolant électrique, à savoir sur le corps 1 un revêtement 9 qui se termine sous la partie annulaire 2 par une lèvre circulaire 11 formant une sorte de jupe coaxiale à l'axe XX du rotor 2 et du chapeau 8. Une couche isolante 12 recouvre également la douille 7 et se termine, au niveau de la lèvre 11, par un anneau 13 intérieur à cette dernière.These various parts are covered with an electrical insulator, namely on the body 1 a coating 9 which ends under the annular part 2 by a circular lip 11 forming a sort of skirt coaxial with the axis XX of the rotor 2 and the cap. 8. An insulating layer 12 also covers the sleeve 7 and ends, at the level of the lip 11, by a ring 13 inside the latter.

Le chapeau 8 est revêtu d'une coiffe iso­lante 14 qui complète l'isolement de la clé.The cap 8 is coated with an insulating cap 14 which completes the isolation of the key.

Celle-ci est munie conformément à l'inven­tion d'une bague isolante 15 en une matière plastique appropriée, entourant la partie 3a du rotor 3 laissée libre par l'élément 7 de recouvrement, c'est-à-dire la partie cylindrique 3a du rotor 3 comprise entre ses extrémités 5 et 6. La bague 15 est pourvue d'une collerette ter- minale 16 en forme de coupelle adaptée pour épouser le contour de la collerette 4, et constituée d'une partie 16a s'étendant radialement et d'un anneau terminal 16b s'étendant dans le sens axial. Cette collerette 16a, 16b s'emboite dans un dégagement correspondant du revêtement isolant 9, auquel elle est fixée, sensiblement au niveau de la lèvre circulaire 11, avec un léger jeu, par rapport à la surface du rotor 3.This is provided in accordance with the invention with an insulating ring 15 made of a suitable plastic material, surrounding the part 3a of the rotor 3 left free by the covering element 7, that is to say the cylindrical part 3a of the rotor 3 between its ends 5 and 6. The ring 15 is provided with a terminal flange 16 in the form of a cup adapted to follow the contour of the flange 4, and consisting of a part 16a extending radially and an end ring 16b extending in the axial direction. This flange 16a, 16b fits into a corresponding clearance in the insulating coating 9, to which it is fixed, substantially at the level of the circular lip 11, with a slight clearance, relative to the surface of the rotor 3.

De plus, une gorge annulaire 17 est ménagée dans la surface extérieure de la bague 15, et cette gorge 17 reçoit un premier cordon annulaire 18 isolant et étanche, faisant partie de la couche isolante 12, en formant une saillie interne de la collerette 13.In addition, an annular groove 17 is formed in the outer surface of the ring 15, and this groove 17 receives a first annular bead 18 insulating and waterproof, forming part of the insulating layer 12, forming an internal projection of the collar 13.

Complémentairement, le chapeau isolant 14 présente une gorge annulaire 19 recevant un second cordon annulaire isolant 21 faisant partie de l'iso­lant 9, par rapport auquel il fait saillie inté­rieurement.In addition, the insulating cap 14 has an annular groove 19 receiving a second annular insulating bead 21 forming part of the insulator 9, with respect to which it projects internally.

Les deux cordons 18 et 21 sont appliqués dans les gorges respectives 15 et 19 de manière étanche.The two cords 18 and 21 are applied in the respective grooves 15 and 19 in a sealed manner.

L'isolation du rotor 3 est donc parfaitement assurée par ces cordons 18,21 et par la bague 15, qui ne subit aucune usure grâce au léger jeu réservé entre celle-ci et le rotor 3. D'autre part, la fabrication de la bague 15 par l'un des procédés précités lui confère une cote extérieure très précise et qui reste toujours stable, ce qui permet à la clé de satisfaire à la norme d'isolation ci-dessus.The insulation of the rotor 3 is therefore perfectly ensured by these cords 18, 21 and by the ring 15, which undergoes no wear thanks to the slight clearance reserved between the latter and the rotor 3. On the other hand, the manufacture of the ring 15 by one of the aforementioned processes gives it a very precise external dimension and which always remains stable, which allows the key to meet the above insulation standard.

Claims (3)

1.Clé à cliquet isolante, comprenant un corps (1), un rotor (3) dont une extrémité est engagée dans le corps (1), un chapeau (8) coiffant le corps, un élément de recouvrement partiel du rotor tel qu'une douille (7), et un isolant électrique (9,12) recou­vrant ces différentes pièces, caractérisée en ce qu'elle comporte une bague isolante (15) entourant la partie (3a) du rotor (3) laissée libre par ledit élément (7), et qui est munie d'une collerette terminale (16) fixée au revêtement isolant (9) du corps (1), et un léger jeu est réservé entre cette bague (15) et le rotor (3).1.Insulating ratchet wrench, comprising a body (1), a rotor (3) one end of which is engaged in the body (1), a cap (8) covering the body, an element for partially covering the rotor such as a sleeve (7), and an electrical insulator (9,12) covering these different parts, characterized in that it comprises an insulating ring (15) surrounding the part (3a) of the rotor (3) left free by said element ( 7), and which is provided with an end collar (16) fixed to the insulating coating (9) of the body (1), and a slight clearance is reserved between this ring (15) and the rotor (3). 2. Clé selon la revendication 1, carac­térisée en ce que la bague (15) présente une gorge annulaire (17) dans laquelle est reçu un premier cordon annulaire (18) isolant et étanche faisant partie de l'isolant (12,13) de l'élément de recou­vrement (7) du rotor (3).2. Key according to claim 1, characterized in that the ring (15) has an annular groove (17) in which is received a first annular bead (18) insulating and waterproof forming part of the insulator (12,13) of the covering element (7) of the rotor (3). 3. Clé selon la revendication 2, carac­térisée en ce que le chapeau (8) est revêtu d'une coiffe isolante (6) dans laquelle est ménagée une gorge annulaire (19) recevant de manière étanche un second cordon annulaire isolant (21) faisant partie de l'isolant (9) du corps (1).3. Key according to claim 2, characterized in that the cap (8) is coated with an insulating cap (6) in which is formed an annular groove (19) sealingly receiving a second annular insulating bead (21) making part of the insulator (9) of the body (1).
EP19890400133 1988-03-03 1989-01-17 Insulated ratchet wrench Expired - Lifetime EP0331534B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8802720 1988-03-03
FR8802720A FR2628019B1 (en) 1988-03-03 1988-03-03 INSULATING RATCHET KEY

Publications (2)

Publication Number Publication Date
EP0331534A1 true EP0331534A1 (en) 1989-09-06
EP0331534B1 EP0331534B1 (en) 1993-04-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890400133 Expired - Lifetime EP0331534B1 (en) 1988-03-03 1989-01-17 Insulated ratchet wrench

Country Status (4)

Country Link
EP (1) EP0331534B1 (en)
DE (1) DE68906060T2 (en)
ES (1) ES2040475T3 (en)
FR (1) FR2628019B1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000059686A2 (en) * 1999-04-06 2000-10-12 Ofentavsek Tone Electrically insulated hand tool with a detent mechanism
WO2012139302A1 (en) * 2011-04-15 2012-10-18 Lai Jim Insulated ratchet wrench
TWI386285B (en) * 2010-11-26 2013-02-21
TWI398330B (en) * 2011-05-20 2013-06-11 Ssu Cheng Lai Torque device insulation device
CN103381581A (en) * 2012-05-04 2013-11-06 瞬丰实业有限公司 Insulating structure of wrench
EP3192615A1 (en) * 2015-12-21 2017-07-19 STAHLWILLE Eduard Wille GmbH & Co. KG Insulated tool and/or measuring device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202015105733U1 (en) 2015-10-28 2015-11-06 Eduard Wille Gmbh & Co. Kg Tool and / or measuring device insulation
DE102017106416A1 (en) 2017-03-24 2018-09-27 STAHLWILLE Eduard Wille GmbH & Co. KG Isolation adapter for tools
CN109176374A (en) * 2018-10-23 2019-01-11 泰州首创环保科技有限公司 A kind of Insulation spanner

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6922652U (en) * 1969-06-04 1969-10-02 G Adolf Lemp RATCHET WRENCH
US4123953A (en) * 1977-06-09 1978-11-07 Corbacho Jr Hipolito Ratchet wrench
DE8025835U1 (en) * 1981-02-19 Arcus Elektrotechnik Alois Schiffmann Gmbh, 8000 Muenchen
DE8208083U1 (en) * 1982-03-22 1982-07-22 Arcus Elektrotechnik Alois Schiffmann GmbH, 8000 München Tool wrench
DE3214867A1 (en) * 1982-04-22 1983-10-27 Werkzeugfabrik G. Adolf Lemp & Co, 5630 Remscheid Ratchet with direction locking device arranged in the operating lever
US4425828A (en) * 1981-11-30 1984-01-17 Berdinner Jr E J Right angle drive ratchet screw-driver
FR2610561A1 (en) * 1987-02-10 1988-08-12 Sibille & Cie Ateliers Ratchet handle intended for tightening a screw, particularly in an electrical cable connector

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8025835U1 (en) * 1981-02-19 Arcus Elektrotechnik Alois Schiffmann Gmbh, 8000 Muenchen
DE6922652U (en) * 1969-06-04 1969-10-02 G Adolf Lemp RATCHET WRENCH
US4123953A (en) * 1977-06-09 1978-11-07 Corbacho Jr Hipolito Ratchet wrench
US4425828A (en) * 1981-11-30 1984-01-17 Berdinner Jr E J Right angle drive ratchet screw-driver
DE8208083U1 (en) * 1982-03-22 1982-07-22 Arcus Elektrotechnik Alois Schiffmann GmbH, 8000 München Tool wrench
DE3214867A1 (en) * 1982-04-22 1983-10-27 Werkzeugfabrik G. Adolf Lemp & Co, 5630 Remscheid Ratchet with direction locking device arranged in the operating lever
FR2610561A1 (en) * 1987-02-10 1988-08-12 Sibille & Cie Ateliers Ratchet handle intended for tightening a screw, particularly in an electrical cable connector

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000059686A2 (en) * 1999-04-06 2000-10-12 Ofentavsek Tone Electrically insulated hand tool with a detent mechanism
WO2000059686A3 (en) * 1999-04-06 2001-03-01 Tone Ofentavsek Electrically insulated hand tool with a detent mechanism
TWI386285B (en) * 2010-11-26 2013-02-21
WO2012139302A1 (en) * 2011-04-15 2012-10-18 Lai Jim Insulated ratchet wrench
CN103732356A (en) * 2011-04-15 2014-04-16 赖四正 Insulated ratchet wrench
DE112011105024B4 (en) * 2011-04-15 2017-11-09 Jim LAI Isolierratsche
TWI398330B (en) * 2011-05-20 2013-06-11 Ssu Cheng Lai Torque device insulation device
CN103381581A (en) * 2012-05-04 2013-11-06 瞬丰实业有限公司 Insulating structure of wrench
EP3192615A1 (en) * 2015-12-21 2017-07-19 STAHLWILLE Eduard Wille GmbH & Co. KG Insulated tool and/or measuring device

Also Published As

Publication number Publication date
DE68906060T2 (en) 1993-07-29
FR2628019A1 (en) 1989-09-08
FR2628019B1 (en) 1990-07-27
DE68906060D1 (en) 1993-05-27
EP0331534B1 (en) 1993-04-21
ES2040475T3 (en) 1993-10-16

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