EP0521490B1 - Arrangement de deux éléments de construction connectés télescopiquement l'un avec l'autre - Google Patents

Arrangement de deux éléments de construction connectés télescopiquement l'un avec l'autre Download PDF

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Publication number
EP0521490B1
EP0521490B1 EP19920111164 EP92111164A EP0521490B1 EP 0521490 B1 EP0521490 B1 EP 0521490B1 EP 19920111164 EP19920111164 EP 19920111164 EP 92111164 A EP92111164 A EP 92111164A EP 0521490 B1 EP0521490 B1 EP 0521490B1
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EP
European Patent Office
Prior art keywords
screw
groove
tip
accordance
assembly
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
Application number
EP19920111164
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German (de)
English (en)
Other versions
EP0521490A2 (fr
EP0521490A3 (en
Inventor
Alexander Tzanovici
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.)
Hewi Heinrich Wilke GmbH
Original Assignee
Hewi Heinrich Wilke 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 Hewi Heinrich Wilke GmbH filed Critical Hewi Heinrich Wilke GmbH
Publication of EP0521490A2 publication Critical patent/EP0521490A2/fr
Publication of EP0521490A3 publication Critical patent/EP0521490A3/de
Application granted granted Critical
Publication of EP0521490B1 publication Critical patent/EP0521490B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B1/00—Knobs or handles for wings; Knobs, handles, or press buttons for locks or latches on wings
    • E05B1/0015—Knobs or handles which do not operate the bolt or lock, e.g. non-movable; Mounting thereof
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B3/00—Fastening knobs or handles to lock or latch parts
    • E05B3/04—Fastening the knob or the handle shank to the spindle by screws, springs or snap bolts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T292/00—Closure fasteners
    • Y10T292/85—Knob-attaching devices
    • Y10T292/858—Screw
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7041—Interfitted members including set screw

Definitions

  • the invention relates to an arrangement of two telescopically interconnected components, one of which has an externally accessible, through to the other component through bore, into which a screw is screwed, and the other in alignment with the bore one in the telescopic direction extending elongated groove, the depth of which increases from one end to the other in the telescopic direction.
  • Examples of such arrangements are door handles connected with a handle pin (DE-OS 24 15 905), rod systems with projecting metal connecting pins or plastic sleeves having metal sleeves which are to be connected axially to one another (DE-PS 26 32 696), or between two walls clampable support rods that contain a spreader pin (DE-PS 26 29 186).
  • a door handle connection with a handle mandrel which engages in the inner square of the neck of door handles and penetrates the inner square of a lock groove.
  • the handle mandrel consists of two right-angled cross-sectional longitudinal halves against which at least the pressure screw guided in the neck of the door handle can be tightened Each recess has a flat that forms a right angle with the side with which the longitudinal half faces the other longitudinal half.
  • a problem with the axial fixation of two telescopically interconnected components by means of a radial grub screw is that the surface contact between the screw and the groove is limited, in particular in the case of an elongated groove with a continuously increasing or decreasing depth, which limits the screw and the groove , whereby the screw and the groove are heavily loaded when trying to pull the two parts apart or push them together.
  • the aim of the invention is to provide an arrangement of two telescopically interconnected components of the type mentioned, in which the largest possible contact between the screw and the groove is always guaranteed regardless of the depth of the groove at the connection point.
  • This design ensures that at least one of the flanks of the groove, but preferably both flanks of the groove are in a theoretically linear, but practically flat contact with one another, so that the screw not only penetrates with its tip into the groove base, but the flank ( n) primarily establish the force-transmitting contact.
  • a roll-off effect is achieved by the lateral displacement of the screw and groove, which can be used for a targeted relative displacement of the two components.
  • a first embodiment of the invention is characterized by claim 2. So here both flanks of the groove are available for the power transmission from the screw.
  • the slope should be so small that when the screw is tightened, self-locking occurs in the sense that the telescopically connected components maintain their relative position when screwed in. For this reason, the slope of the bottom of the groove should be designed relative to the telescopic displacement direction according to claim 4.
  • Such an embodiment is suitable e.g. For fastening door handles to a handle pin, provided that only the relative position to the handle pin determined by sliding the handle should be maintained.
  • the slope of the groove can also be made so large that the screw screw slides down along the groove, the two telescopically connected components being displaced relative to one another in the telescopic displacement direction.
  • the slope must be much steeper and e.g. be chosen according to claim 6.
  • the two components can be clamped axially in one direction or the other by screwing in the screw.
  • the axial pull apart or pushing together of the components effectively avoided because of the much more steeply increasing groove here.
  • the pitch of the thread and the slope of the groove should be designed according to claim 7.
  • the screw should not get stuck in the groove when the flank begins to be touched, but should first perform the axial rolling movement. If the two components are then clamped to one another to the desired extent, for example by coming to rest against one another or against a stop, the screw can then be forcibly screwed in, whereby both flanks of the groove also come into contact by elastic or plastic deformation the conical tip of the screw.
  • the slope of the bottom of the groove should be chosen according to claim 8.
  • the rolling operation can only take place with a precisely conical tip by partially rubbing the conical tip on the flank.
  • the special embodiment according to claim 9 be provided.
  • the frictional connection between the conical tip and flank is axially limited.
  • the axial bracing of the two components can be further promoted by the measures of claim 10 by working not only with frictional engagement, but also with positive engagement between the conical tip and the associated flank.
  • the screw In order to attract as little attention as possible from the outside, the screw should be a grub screw, which should have an Allen key opening for transmitting the required clamping forces.
  • a hint of a door handle 11 which is only indicated, has an axial channel 21 with a square cross section, in which a handle pin 12 with a cross section complementary to the cross section of the axial channel 21 is arranged.
  • the lock nut not shown, is located in the direction of arrow 35, while the handle provided for actuation is provided in the direction of arrow 36.
  • a groove 17 is provided in the end region of the handle pin 12 facing away from the lock nut, which has in the direction of the axis 37 of the handle pin 12 the elongated shape which can be seen in particular from FIGS. 1 and 2 and essentially consists of two there are flanks 18, 19 arranged at an angle of 120 ° (FIG. 3) to one another.
  • the two flat flanks 18, 19 are thus arranged essentially in a V-shape with respect to one another and meet at the bottom in a base 20 forming an edge.
  • the neck of the door handle 11 and the handle pin 12 are telescopically displaceable in the direction of the axis 37.
  • the deepest end of the groove 17 facing the lock nut 35 is designed as a conical half-bore 17 '.
  • flanks 18, 19 merge directly into the surface 38 of the pusher pin 12 at this point. Since the flanks 18, 19 are arranged according to the invention in all cross sections at the same angle to one another, increasingly higher and vertically extending side flanks 17 ′′ are provided in the deeper regions of the groove 17.
  • the lever handle has a radial bore 13 provided with a thread 39, into which a grub screw 14 provided with an Allen key 34 is screwed with a flat conical tip 15.
  • the cone angle of the cone tip 15 is 120 ° and thus corresponds to the angle between the flat flanks 18, 19 of the groove 17.
  • the screw 14 is turned downwards by inserting an Allen key into the correspondingly designed polygonal opening 34 and turning the Allen key, the flanks 18, 19 of the groove 17 come with the cone tip 15 in a continuous engagement, while the foremost point 15 'of the tip 15 comes into contact with the groove base 20.
  • a comparatively large contact surface is created between the screw 14 and the pusher pin 12, especially when the screw 14 is made of hard material, the flanks 18, 19 and the base 20 of the groove 17 against it consist of soft material so that the tip 15 can dig somewhat into the material of the pusher pin 12.
  • a further possible slide-on position of the door handle 11 on the handle pin 12 is illustrated in dashed lines, where the screw 14 lies opposite a substantially deeper part of the groove 17.
  • the screw 14 must be screwed into the threaded bore 39 much deeper in order to come into contact with the flanks 18, 19 or the bottom 20 of the groove 17 which are lower at this point.
  • a flawless and comparatively large-area connection between the screw 14 and the handle pin 12 is also produced in the relative position between the door handle 11 and the handle pin 12, indicated in dashed lines.
  • the slope ⁇ is chosen so small in the embodiment of FIGS. 1 to 3 that the screw 14 can be tightened in any relative position of the door handle 11 and the handle pin 12 without the two parts being axially displaced relative to each other.
  • the slope ⁇ could also be made significantly steeper, for example by giving it a length of 45 °. In this case there would be no self-locking Enter more and the handle 11 would be moved as the screw 14 is screwed in progressively so that the screw 14 reaches ever deeper points in the groove 17. In this way, the door handle 11 and the handle pin 12 could be braced axially against each other.
  • the door handle 11 shown in cross section perpendicular to the axis of rotation 37 consists of an outer plastic jacket 11a and an inner metal jacket 11b.
  • the groove 17 in one square surface of the pusher pin 12 is formed in the same way as in FIGS. 1 to 3.
  • the axis 23 of the screw 14 is laterally displaced relative to the base 20 of the groove by a small piece 40, so that the conical tip 15 initially only with the Flank 18 of the groove 17 comes into engagement.
  • the approximately conical tip 15 can be of somewhat spherical or convex curvature according to FIG. 5, so that with the displacement 40 still present, the conical tip 15 along a limited axial circumferential region 24 on the flank 18 is present.
  • the convex curvature should be so slight that when the screw 14 is finally tightened, the tip 15 can dig into the softer material of the pusher pin 12 such that the tip 15 ultimately lies completely against the flanks 18, 19.
  • the limited peripheral area 24 can also be realized by a slightly protruding annular bead 41 on the conical tip 15, which then with the flank 18 comes into contact.
  • the bead 41 should, however, only protrude slightly beyond the conical tip 15 so that when the screw 14 is finally tightened, the bead 41 digs into the material of the pusher pin 12, so that, in this embodiment as well, the conical tip 15 ultimately completely on both flanks 18 , 19 comes to the plant.
  • projections 25 are provided on the outer circumference of the conical tip 15 at regular angular intervals, which, when the screw 14 is screwed in, either dig into the softer material of the trigger pin 12 or with corresponding depressions 26 provided in the flank 18 Work together like a gear connection.
  • the material of the pusher pin 12 should be so soft that the projections 25 can dig into the material of the groove 17.
  • a screwdriver slot 34 ' is provided in the screw 14 instead of the hexagon socket opening 34 according to FIGS. 1 to 4.
  • the size of the force transmission can be changed from the tool actuating the screw 14 to the push pin 12.
  • Fig. 10 shows a door leaf 31, on one side of which a lock 42 with a lock nut 43 is arranged, which is penetrated by a handle pin 12.
  • the handle 11 has the axial channel 21 for receiving the protruding end of the handle pin 12, in which the groove 17 according to the invention is provided, which lies radially opposite the screw 14 in the door handle 11, which is only indicated by dashed lines.
  • the opposite end of the handle pin 12 is fixed in the door handle 22 arranged on the other side of the door leaf 31.
  • the two lever handles 11, 22 are rotatably mounted with their necks in the usual manner in rosettes 44, 45, which are fixed to the door leaf 31 by screws 46, 47.
  • the groove 17 should be designed as flat as according to FIGS. 1 to 3 so that a self-locking takes place when the screw 14 is screwed in .
  • the axial bracing can be brought about not only by displacing the screw 14 relative to the groove 17 according to FIGS. 4 to 9, but also by a very steeply falling groove 17, as is the case in FIG. 11 is the case with the connecting pins 12 ".
  • U-shaped handles 49, 49 ' are attached to a door leaf 31 on opposite sides by means of the fastening according to the invention.
  • a connecting pin 12 ′ extends from the legs of the handle 49 on the left in FIG. 11 through through holes 32 in the door leaf 31 into an axial channel 21 ′ of the opposite handle 49 ′.
  • the end of the connecting pin 12 'located in the left handle 49 is provided with a thread 27 and can accordingly be screwed more or less deeply into a corresponding threaded bore 50 of the handle 49.
  • the end of the connecting pin 12 'protruding into the axial channel 21' has on one circumferential side the groove 17 according to the invention, into which the screw 14 screwed into the radial bore 13 engages.
  • the two handles 49, 49 ' can be clamped against one another or against the door leaf 31 by screwing in the screw 14. Because of the oblique design of the groove 17, an exercise of considerable tensile forces in the direction of the arrows K is made possible at the same time.
  • each handle 49, 49 ' consists of a plastic tube 29 with a metal inner tube 51 and a plastic jacket 28.
  • connecting pins 12 ′′ extend in both directions, which are firmly connected to the metal tube 51 and extend over the ends of the tubes 29 into axial channels 21 ′ of node elements 11 ′ axially adjoining the tubes 29, which also act as plastic tubes are formed with a plastic jacket 28 'and a solid metal core 51'.
  • the connecting pins 12 ′′ have the groove 17 according to the invention, into which the screw 14 is screwed.
  • the groove 17 at the end of the connecting pin 12 ′′ is designed to be substantially steeper than in the previous exemplary embodiments, so that the screws 14 screwed into the groove 17 are not self-lockingly clamped there, but instead exert an axial force A on the connecting pins 12 ′′ when they are screwed in , which leads to the fact that the node elements 11 'and the plastic tubes 29 are pressed against one another at 52. In this way, the node elements 11 'and the plastic tubes 29 can be clamped against one another with any desired axial clamping force.
  • This is important because plastic expands due to temperature and moisture influences and such an axial bracing must be brought about during manufacture that under 52 no gap (for example when the temperature drops) can open under any circumstances. It is important that only the plastic shells 28, 28 'but not the metal cores 51, 51' touch.
  • the axial bracing effect brought about by the bevel 17 can be caused by the lateral displacement of the Screw 14 and the groove 17 according to FIGS. 4 to 9 are further reinforced.
  • FIG. 12 shows the application of the invention to a support rod 11 ′′ which is to be arranged between two walls 33.
  • the support rod 11 ′′ consisting of a tubular metal core 51 ′′ and a surrounding plastic jacket 28 ′′, is supported at one end via an intermediate member 53 on one wall 33.
  • a projection 54 of the intermediate member 53 engages in a bore 55 of the wall.
  • a cylindrical expansion member 12 '' ' is axially displaceable in the sliding fit in the inner tube 51' ', which is designed as a hollow-cylindrical plastic body 58 with an embedded metal pin 59 of smaller diameter and with a facing 56 which extends beyond the support rod 11' '.
  • the metal pin 59 of the expansion member 12 '' 'protruding towards the wall 33 extends into a suitable bore 57 in the wall 33.
  • the screw 14 is screwed radially into the bore 13, due to the formation of the groove 17 according to FIGS 9 the expansion member 12 '''is successively extended in the direction of the wall 33.
  • the protruding end of the Metal pin 58 of the expansion member 12 '''in the bore 57, and the plastic body 58 rests against the wall 33, so that the support rod 11''is clamped between the two walls 33.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Lock And Its Accessories (AREA)
  • Ladders (AREA)
  • Tents Or Canopies (AREA)

Claims (15)

  1. Arrangement de deux éléments de construction reliés télescopiquement (11, 12), dont l'un (11) comporte un trou (13) présentant un taraudage (16), accessible de l'extérieur, qui le traverse jusqu'à l'autre élément (12) et orienté perpendiculairement à la direction de déplacement télescopique, trou dans lequel une vis (14) ayant au moins une pointe sensiblement conique (15) est vissée, l'autre élément comportant une rainure allongée (17) qui est à l'alignement du trou (13), orientée dans la direction de déplacement télescopique et ayant une section complémentaire de la pointe conique (15) de la vis (14),
       caractérisé
       en ce que l'autre élément de construction (12) est réalisé monobloc, en ce que la rainure (17) a une profondeur qui croît d'une extrémité à l'autre dans la direction de déplacement télescopique et dans laquelle la vis (14) pénètre suffisamment profondément pour que la pointe conique (15) exerce une pression contre au moins l'un des deux flancs (18, 19),en ce que la pointe (15) de la vis (14) et le fond (20) de la rainure (17) sont légèrement décalés transversalement par rapport à la direction de déplacement télescopique et à l'axe du trou (13), en ce que lors du vissage de la vis (4), sa pointe (15) n'entre en contact qu'avec un flanc (18) de la rainure (17), à savoir celui qui, lors du vissage de la vis (14) est déplacé par le roulement de la pointe conique contre lui, par rapport à l'élément (11) contenant la vis (14), dans le sens de déplacement télescopique dans lequel la profondeur de la rainure (17) augmente.
  2. Arrangement selon la revendication 1, dans lequel la pointe (15) de la vis (14) et le fond (20) de la rainure (17) sont alignés l'un sur l'autre et la pointe conique (15) de la vis (14) ayant été vissée exerce une pression contre les deux flancs (18, 19) et de préférence aussi contre le fond (20) de la rainure (17).
  3. Arrangement selon la revendication 2, caractérisé en ce que la pente du fond (20) de la rainure (17) est suffisamment grande seulement pour qu'il se produise encore un autoblocage lors du vissage de la vis (14).
  4. Arrangement selon la revendication 3, dans lequel la pente (α) du fond (20) de la rainure (17) est supérieure à 5° et inférieure à 10°, de préférence inférieure à 20°.
  5. Arrangement selon la revendication 2, dans lequel la pente (α) de la rainure (17) est suffisamment grande pour que, lors du vissage de la vis (14), sa pointe (15) glisse vers le bas sur la pente (α) de la rainure (17) et déplace ainsi les éléments de construction (11, 12) en conséquence télescopiquement l'un dans l'autre,
  6. Arrangement selon la revendication 5, dans lequel la pente (α) est supérieure à 30° et inférieure à 60°, en particulier inférieure à 45°.
  7. Arrangement selon l'une des revendications précédentes, dans lequel le pas du taraudage (16) et la pente (α) du fond (20) de la rainure (17) sont adaptés l'un à l'autre de manière que lors du vissage de la vis (14), la pointe (15) de la vis (14) se déplace vers le fond (20) de la rainure (17) au maximum de la mesure dans laquelle la rainure (17) devient plus profonde par le déplacement dans la direction de déplacement télescopique.
  8. Arrangement selon la revendication 7, dans lequel la pente (α) du fond (20) de la rainure est de 10° à 30° et en particulier d'environ 20°.
  9. Arrangement selon l'une des revendications précédentes, dans lequel la pointe (15) de la vis (14) et/ou les flancs (18, 19) de la rainure (17) présentent en section une courbure au moins partiellement convexe perpendiculairement à la direction de déplacement télescopique de manière que lors du vissage de la vis (14), la pointe (15) n'entre en contact avec le flanc correspondant (18) sensiblement que par une zone de la circonférence (24) qui est limitée dans la direction de l'axe de la vis (23).
  10. Arrangement selon l'une des revendications précédentes, dans lequel des moyens d'entrée en prise (25, 26) garantissant dans la direction de déplacement télescopique une complémentarité de formes au moins partielle de la pointe (15) et du flanc (18) sont prévus le long de la circonférence ou de la zone limitée de la circonférence (24) de la pointe (15) et/ou dans le flanc (18) contre lequel la pointe (15) se place.
  11. Arrangement selon l'une des revendications précédentes, dans lequel la vis est une vis sans tête (14) qui s'actionne de préférence par un clé pour boulon à six pans creux.
  12. Arrangement selon l'une des revendications précédentes, dans lequel la vis (14) est plus dure, au moins dans la région de la sa pointe (15), que les flancs (18, 19) de la rainure (17).
  13. Arrangement selon l'une des revendications précédentes, dans lequel deux éléments de construction reliés télescopiquement l'un à l'autre sont une béquille (11) comprenant un canal axial qui n'est pas rond (21) et comportant le trou (13) avec la vis (14) et une tige de loquet (12) complémentaire du canal axial (21) et comportant la rainure (17).
  14. Arrangement selon l'une des revendications 1 à 12, dans lequel les deux éléments de construction reliés télescopiquement l'un à l'autre sont un tube de matière plastique (11') présentant de préférence une partie centrale métallique (51') tubulaire ou pleine comportant au moins un canal axial (21') et qui comporte au moins à une extrémité, dans la région du canal axial (21'), le trou (13) et la vis (14), et une tige d'assemblage (12', 12") qui comporte la rainure (17), qui est complémentaire du canal axial (21'), qui est saillante axialement et qui fait partie d'un autre tube de matière plastique (11', 29) comportant de préférence une partie centrale métallique tubulaire ou pleine (51, 51'), les deux tubes de matière plastique (11', 29) étant directement en contact axial (52) ou étant en appui par les cotés opposés contre une plaque, en particulier un vantail de porte (31) comportant des trous correspondants de traversée (32), ces éléments étant assemblés l'un par rapport à l'autre par vissage de la vis (14) dans la rainure (17) au moins selon les revendications 2 à 4, toutefois étant de préférence fixés l'un à l'autre selon l'une des revendications 5 à 13.
  15. Arrangement selon l'une des revendications 1 à 12, dans lequel les deux éléments de construction reliés télescopiquement l'un à l'autre sont une barre (11") pouvant se loger entre deux cloisons (33), comportant au moins à une extrémité un canal axial (21") et comportant au moins un trou (13) avec la vis (14), ainsi qu'un organe à expansion (12") complémentaire du canal axial (21") et comportant la rainure (17).
EP19920111164 1991-07-01 1992-07-01 Arrangement de deux éléments de construction connectés télescopiquement l'un avec l'autre Expired - Lifetime EP0521490B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19914121770 DE4121770A1 (de) 1991-07-01 1991-07-01 Anordnung aus zwei teleskopisch miteinander verbundenen bauelementen
DE4121770 1991-07-01

Publications (3)

Publication Number Publication Date
EP0521490A2 EP0521490A2 (fr) 1993-01-07
EP0521490A3 EP0521490A3 (en) 1993-03-03
EP0521490B1 true EP0521490B1 (fr) 1996-02-28

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Application Number Title Priority Date Filing Date
EP19920111164 Expired - Lifetime EP0521490B1 (fr) 1991-07-01 1992-07-01 Arrangement de deux éléments de construction connectés télescopiquement l'un avec l'autre

Country Status (5)

Country Link
US (1) US5228798A (fr)
EP (1) EP0521490B1 (fr)
AT (1) ATE134736T1 (fr)
CA (1) CA2072859A1 (fr)
DE (2) DE4121770A1 (fr)

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Also Published As

Publication number Publication date
DE4121770A1 (de) 1993-01-07
EP0521490A2 (fr) 1993-01-07
ATE134736T1 (de) 1996-03-15
DE59205441D1 (de) 1996-04-04
EP0521490A3 (en) 1993-03-03
US5228798A (en) 1993-07-20
CA2072859A1 (fr) 1993-01-02

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