EP0688958A1 - Arrangement de soupape - Google Patents

Arrangement de soupape Download PDF

Info

Publication number
EP0688958A1
EP0688958A1 EP95108289A EP95108289A EP0688958A1 EP 0688958 A1 EP0688958 A1 EP 0688958A1 EP 95108289 A EP95108289 A EP 95108289A EP 95108289 A EP95108289 A EP 95108289A EP 0688958 A1 EP0688958 A1 EP 0688958A1
Authority
EP
European Patent Office
Prior art keywords
plate
valve
channels
branch
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.)
Granted
Application number
EP95108289A
Other languages
German (de)
English (en)
Other versions
EP0688958B1 (fr
Inventor
Kurt Dr. Stoll
Henning Ossenkop
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.)
Festo SE and Co KG
Original Assignee
Festo SE and Co KG
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 Festo SE and Co KG filed Critical Festo SE and Co KG
Publication of EP0688958A1 publication Critical patent/EP0688958A1/fr
Application granted granted Critical
Publication of EP0688958B1 publication Critical patent/EP0688958B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F15B13/0821—Attachment or sealing of modular units to each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F15B13/0807—Manifolds
    • F15B13/0814—Monoblock manifolds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F15B13/0828—Modular units characterised by sealing means of the modular units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F15B13/0832—Modular valves

Definitions

  • the invention relates to a valve arrangement, with a base plate functioning as a fluid distributor, on which an assembly area is provided, which is divided into a plurality of adjacent assembly areas, on each of which a multi-way valve with an assembly area can be mounted, with a plurality of main channels running in the longitudinal direction inside the base plate , below which there is a feed duct and at least one exhaust air duct, and from which branch branch ducts which open out to the assembly surfaces, the mouth of a respective branch duct being opposite the opening of a valve duct designed in the associated mounted multi-way valve and open to the mounting surface, and with one a respective assembly place between the base plate and the mounting surface of the assembled multi-way valve arranged coherent seal, the mutually facing mouths of the branch channels and the valve channel e encloses.
  • Valve arrangements of this type allow a compact battery-like combination of a plurality of multi-way valves in a confined space.
  • the base plate usually consists of an extruded aluminum component, which is traversed in the longitudinal direction by the main channels and into which cross holes are formed, which form the branch channels.
  • Each main channel is usually connected to all assembly stations via a corresponding branch channel.
  • the distribution scheme of the outlets of the branch channels provided at a respective assembly site is expediently identical at each assembly site.
  • the multi-way valves are regularly fastened as part of a screw fastening, several fastening screws passing through the multi-way valve being screwed into the threaded holes in the base plate.
  • Valve channels are formed in the respective multi-way valve, the orifices provided on the mounting surface in the assembled state being aligned with the orifices of the branch channels provided on the base plate.
  • each multi-way valve is connected to the main channels.
  • a seal is interposed between each multi-way valve and the base plate.
  • the applicant has so far been composed of several O-ring-like sections, each of which comes to lie in the area of a pair of orifices and with one another are connected so that a coherent structure results.
  • the multi-way valve does not tilt when it is screwed onto the assigned assembly location, the individual O-ring sections of the seal come to rest in the base plate.
  • the mounting surface of the multi-way valve can be brought into direct contact with the assembly surface.
  • the opening area of the individual branch channels is expanded by introducing a concentric countersink, so that the channel cross section in the opening area is larger than the actual nominal cross section.
  • the object of the present invention is to provide a valve arrangement of the type mentioned at the outset which, while the sealing quality of the seal remains unchanged, enables the base plate to be manufactured more cost-effectively.
  • the branch channels open without extension with their nominal cross-section to the mounting surface of the base plate, that the seal is designed as an elastic sealing plate, the plate-shaped Has base body, which at least almost completely covers the mounting surface of the associated multi-way valve and has openings which are flush with the mouths of the branch channels and the valve channels, such that each of these openings is surrounded on at least one of the two larger-area plate sides by an annular sealing bead formed on the plate-shaped base body of the sealing plate , and that on at least one of the larger-area plate sides in the area of at least two openings there is provided a pipe socket-like alignment extension which is arranged coaxially to the relevant opening and molded onto the plate-shaped base body and can dip into the assigned branch or valve channel.
  • the seal is designed as an elastic sealing plate which essentially covers the mounting surface of the associated multi-way valve, so that the multi-way valve has a large area during assembly and in the assembled state sits on the sealing plate. Tilting of the multi-way valve during assembly is therefore excluded.
  • each opening of the sealing plate communicating with a branch channel is provided with a sealing bead, preferably concentrically surrounding the opening in question, which is raised in relation to the plate-like base body, so that when the solenoid valve is tightened, a high pressure occurs locally, which counteracts leaks. Since the overall production of the sealing plate is no more complex than that of the known seals, the manufacturing costs of the valve arrangement as a whole can be reduced.
  • each opening is assigned a sealing bead of this type on both sides of the plate, the mutually associated sealing beads expediently lying directly one above the other.
  • the valve arrangement 1 shown in FIGS. 1 and 3 has a base plate 2 which acts as a fluid distributor and has a strip-like shape. It is an extruded part, which consists in particular of an aluminum material. According to the example, it is formed from a single component, although it could easily be composed of several, for example, block-like parts.
  • the placement area 3 defines a plurality of placement places 6 arranged in succession in the longitudinal direction 5 of the base plate 2, which are indicated by dashed lines in FIG. 1 for better clarity. These assembly places 6 usually merge imperceptibly into one another.
  • a multi-way valve 4 can be detachably mounted on each assembly station 6.
  • base plates 2 can be provided with a different number of placement areas 3, a number of placement locations between 3 and 16 pieces per base plate having proven to be advantageous.
  • the multi-way valves 4 are expediently aligned such that their longitudinal axis 7 extends at right angles to the longitudinal axis 5 of the base plate 2. In this way, the multi-way valves 4 can be arranged side by side in an extremely space-saving manner.
  • a plurality of fluid channels extending in the longitudinal direction 5 run in the interior of the base plate 2, which are referred to below as main channels 8.
  • the main channels 8 can be formed directly in the manufacture, so that they pull the base plate 2 completely in the longitudinal direction 5 and on both opposite sides Open the end faces.
  • 8 pressure medium lines can be connected to the main channels if required. Therefore 8 connection threads are introduced into the mouths of the main channels.
  • the opposite end face can be provided with a cover which tightly closes the assigned channel openings.
  • five main channels 8 are present. It is a centrally arranged feed channel 13, which is flanked along the opposite sides by an exhaust air duct 14, 14 ', and two pilot channels 15, 15' are also provided, which are preferably in a corner area of the plate cross-section near the Assembly area 3 run.
  • a number of branch channels 16 corresponding to the number of assembly places 6 branches off from each main channel 8 inside the base plate 2. These branch channels 16 which run in the interior of the base plate 2 transversely to the longitudinal axis 5 are each open on the one hand to the assigned main channel 8 and on the other hand to the assigned assembly station 6. In this way, a number of orifices 17 of the branch channels 16 corresponding to the number of main channels 8 is present at each assembly station 6.
  • the cross section of a respective branch channel 16 is constant over its entire length between the assigned main channel 8 and the mounting surface 3. This cross section is called the nominal cross section. This is the flow cross-section available for the fluid to flow through.
  • the arrangement diagram of the mouths 17 is expediently identical in all of the assembly places 6.
  • all of the orifices lie in the region of a straight line which is oriented approximately diagonally with respect to the floor plan of the assembly places 6 which are contoured in a rectangular manner, for example.
  • the multi-way valves 4 to be assembled at the assembly stations 6 have a housing 18 in which a valve slide (not shown in detail) is arranged to be axially movable between different switching positions.
  • the exemplary embodiment is a feed valve channel 24 and two exhaust air valve channels 25, 25 '.
  • two working channels 27 also emanate from the slide receptacle, which, according to the example, open out to the valve top 28 opposite the mounting surface 23 and there enable the flush connection of a consumer to be actuated, for example a working cylinder. Since the structure and mode of operation of such multi-way valves is known as such to the person skilled in the art, there is no need for more detailed explanations here.
  • a respective multi-way valve 4 is attached with its mounting surface 23 to one of the assembly places 6.
  • the orifices 32 of the valve channels 22 provided on the mounting surface 23 and the orifices 17 of the branch channels 16 face each other with the correct assignment.
  • the multi-way valves 4 are fixed, for example, by a screw fastening, for which purpose at least two fastening screws 33 are inserted through each multi-way valve 4, which are supported with their heads on the valve top 28 and are screwed with their threaded shafts into threaded holes 34, which are screwed into each Assembly place 6 are provided in the base plate 2.
  • the working fluid of the valve arrangement 1 is a pneumatic medium.
  • Compressed air is present in the multi-way valve via the pilot channels 15, 15 'and the pilot valve channels 26, 26' communicating therewith, which can act on the actuating elements mentioned by actuating control devices, not shown, in order to specify the position of the valve spool.
  • the control devices are preferably electrically operated solenoid valves.
  • the compressed air supplied via the feed channel 13 and the feed valve channel can be directed into one or the other working channel 27, depending on the position of the valve slide, the working channels 27 themselves via the exhaust air valve channels 25, 25 'and the connected exhaust air channels 14, 14'. can be vented.
  • a seal designed as an elastic sealing plate 35 is interposed between each multi-way valve 4 and the assembly surface 3 of the associated assembly station 6. It is preferably an integral component, preferably made of material with rubber-elastic properties.
  • An essential component of the sealing plate 35 is a plate-shaped base body 36, the outline of which is at least substantially adapted to that of the mounting surface 23, so that it is at least approximately in the assembled state of the multi-way valve 4 completely covers. In this way, practically the entire intermediate area between a respective mounting surface 23 and the assigned assembly area 6 is filled by the plate-shaped base body 36.
  • the result of this is that the clamping force exerted on the solenoid valve 4 via the fastening screws 33 is transmitted over a large area via the sealing plate 35 to the assembly surface 3.
  • the mounting surface 23 is supported by the plate-shaped sealing body 36 over a large area, so that there is no risk of the multi-way valve 4 tipping or tilting when the fastening screws 33 are tightened.
  • the plate-shaped base body 36 thus practically has a supporting function with respect to the associated multi-way valve 4.
  • the plate-shaped base body 36 has a plurality of transversely continuous openings 37, the number of which corresponds to the number of openings 17 of the assigned placement area 6.
  • the distribution pattern of the openings 37 is also identical to that of the mouths 17. They are therefore aligned with the multi-way valve 4 installed with the branch channels 16 and the valve channels 22, so that fluid passage is permitted.
  • each of these perforations 37 is of one on both opposite larger-area plate sides 38, 38 ' concentrically arranged annular sealing bead 42, which is integrally formed on the plate-shaped base body 36 and is slightly raised. It may prove expedient to maintain a certain radial distance between an opening 37 and the associated sealing bead 42, as is the case, for example, with the three larger inner openings having the supply duct 13 and the exhaust air ducts 14, 14 's worn. In particular in the case of openings of smaller diameters, such as in the case of the openings 37 which are external in the exemplary embodiment and interact with the pilot channels 15, 15 ', it may also be advantageous to connect the sealing bead 42 directly to the edge of the respective opening 37. If the multi-way valve 4 is pressed against the base plate 2, the relatively narrow sealing beads 42 bring about a reliable sealing contact because of the higher surface pressure.
  • the openings 37 are assigned to such a sealing bead 42 only on one plate side 38 or 38 '.
  • the sealing plate material is selected so that a respective sealing bead 42 also appears on the opposite side of the plate when it is acted upon, so that the area of high surface pressure is transmitted through the material to the opposite side of the sealing plate. This again results in a secure seal.
  • the sealing plate 35 according to the invention makes it possible in the area of the mouths 17 of the branch channels 16 to dispense with channel expansions beyond the nominal cross section, which were previously provided for receiving seals. This enables a simplified production of the base plate 2.
  • the rubber-elastic sealing plate 35 expediently also has assembly aids which simplify its correct alignment with respect to the placement locations 6 and / or the multi-way valves 4.
  • assembly aids are provided in the form of pipe socket-like alignment extensions 43, which are integrally formed on the plate-shaped base body 36, in a coaxial arrangement with respect to the openings 37.
  • the longitudinal axes of the alignment extensions 43 run at right angles to the plate plane and go through the center of the respectively assigned opening 37. Its outer diameter is adapted to the diameter of the associated branch or valve channel 16, 22 in such a way that it can be inserted into its mouth region and thereby lies against the relevant channel wall.
  • each multi-way valve 4 is exactly aligned with respect to the associated assembly location 6 via the associated sealing plate 35. Only those are preferred Openings 37 alignment extensions 43 are provided which have a larger diameter. According to the example, these are the feed channels 13, 24 and the exhaust air channels 14, 14 '; 25, 25 'associated openings. With the pilot channels having a relatively small diameter, the alignment extensions 43 would possibly have a negative influence on the possible flow rate.
  • the openings 37 communicating with the exhaust air channels 14, 14 ′ are provided on both sides with alignment projections 43 that merge coaxially into one another.
  • the central opening 37 communicating with the feed channel 13 has a corresponding alignment extension 43 only on the lower plate side 38 ′ facing the base plate 2. There are no further alignment extensions.
  • the plate-shaped base body 36 has two further openings 44, which are aligned with the threaded holes 34 and allow the fastening screws 33 to pass through. No sealing beads or alignment extensions are provided in the area of these further openings 34.
  • the sealing plate 35 of the embodiment has a substantially rectangular plan. Approximately centrally in the area of the two long sides, an edge incision 45 is provided in each case, for example the penetration of a centering pin enables, which is arranged on the multi-way valve and can engage in a centering recess of the associated assembly space (not shown). To save material, the sealing plate can also have more or less large openings at other points.
  • the sealing plate with all its components can be manufactured in one piece as an injection molded part at particularly low cost.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Housings (AREA)
  • Magnetically Actuated Valves (AREA)
  • Compressor (AREA)
EP95108289A 1994-06-17 1995-05-31 Arrangement de soupape Expired - Lifetime EP0688958B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9409788U DE9409788U1 (de) 1994-06-17 1994-06-17 Ventilanordnung
DE9409788U 1994-06-17

Publications (2)

Publication Number Publication Date
EP0688958A1 true EP0688958A1 (fr) 1995-12-27
EP0688958B1 EP0688958B1 (fr) 1999-04-21

Family

ID=6909959

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95108289A Expired - Lifetime EP0688958B1 (fr) 1994-06-17 1995-05-31 Arrangement de soupape

Country Status (3)

Country Link
EP (1) EP0688958B1 (fr)
DE (2) DE9409788U1 (fr)
HU (1) HU214385B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1132626A2 (fr) 2000-03-06 2001-09-12 Ab Rexroth Mecman Plaque d'étancheité hygiénique d'un arrangement de vanne
EP1717498A1 (fr) * 2005-04-28 2006-11-02 Bosch Rexroth Teknik AB Unité de montage de valve sur profils d'aluminium
CN100378345C (zh) * 2003-10-27 2008-04-02 纳博特斯克株式会社 垫圈及配有垫圈的多联阀
WO2009065420A1 (fr) * 2007-11-20 2009-05-28 Festo Ag & Co. Kg Arrangement d'étanchéité et sous-ensemble fluidique équipé de celui-ci
WO2016124210A1 (fr) * 2015-02-04 2016-08-11 Festo Ag & Co. Kg Ensemble de soupape
DE102020102947A1 (de) 2020-02-05 2021-08-05 Bürkert Werke GmbH & Co. KG Anschlussbaugruppe für eine Ventileinheit und Ventileinheit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE552426T1 (de) * 2008-12-10 2012-04-15 Festo Ag & Co Kg Fluidtechnische anordnung und dichtelement
DE102015211360B4 (de) 2015-06-19 2022-06-15 Festo Se & Co. Kg Fluidtechnische Einrichtung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2141525A (en) * 1983-06-15 1984-12-19 Honeywell Lucifer Sa Pneumatic valve
GB2178139A (en) * 1985-06-27 1987-02-04 Festo Kg A valve housing arrangement
DE3610541A1 (de) * 1986-03-27 1987-10-01 Lechler Elring Dichtungswerke Zylinderkopfdichtung
EP0307494A1 (fr) * 1987-09-16 1989-03-22 Colt International Holdings A.G. Bloc intégré
WO1989008212A1 (fr) * 1988-03-01 1989-09-08 J.L. French Corporation Systeme de joint d'etancheite
EP0389776A1 (fr) * 1989-03-31 1990-10-03 Robert Bosch Gmbh Corps de raccordement en forme de bloc
DE4302506A1 (de) * 1993-01-29 1994-08-04 Daimler Benz Ag Verschraubung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2933704A1 (de) * 1979-08-21 1981-03-26 Festo Kg, 73734 Esslingen Druckmittelverbindung zwischen einem ventilblock und einem zumindest einen doppelt wirkenden druckmittelmotor aufweisenden verbraucher
DE3313200A1 (de) * 1983-04-12 1984-10-18 Knorr-Bremse GmbH, 8000 München Mehrwegeventil, insbesondere 4/2-wege-ventil
DE8629683U1 (de) * 1986-11-06 1986-12-18 Parker-Prädifa GmbH, 7120 Bietigheim-Bissingen Dichtungsanordnung
DE4004834C2 (de) * 1990-02-16 1996-06-13 Festo Kg Ventilbaugruppe

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2141525A (en) * 1983-06-15 1984-12-19 Honeywell Lucifer Sa Pneumatic valve
GB2178139A (en) * 1985-06-27 1987-02-04 Festo Kg A valve housing arrangement
DE3610541A1 (de) * 1986-03-27 1987-10-01 Lechler Elring Dichtungswerke Zylinderkopfdichtung
EP0307494A1 (fr) * 1987-09-16 1989-03-22 Colt International Holdings A.G. Bloc intégré
WO1989008212A1 (fr) * 1988-03-01 1989-09-08 J.L. French Corporation Systeme de joint d'etancheite
EP0389776A1 (fr) * 1989-03-31 1990-10-03 Robert Bosch Gmbh Corps de raccordement en forme de bloc
DE4302506A1 (de) * 1993-01-29 1994-08-04 Daimler Benz Ag Verschraubung

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1132626A2 (fr) 2000-03-06 2001-09-12 Ab Rexroth Mecman Plaque d'étancheité hygiénique d'un arrangement de vanne
DE10012067C1 (de) * 2000-03-06 2001-09-27 Rexroth Mecman Stockholm Ab Mehrwegeventil (hygienische Dichtungsplatte)
US6488051B2 (en) 2000-03-06 2002-12-03 Ab Rexroth Mecman Hygienic sealing plate for valve assembly
CN100378345C (zh) * 2003-10-27 2008-04-02 纳博特斯克株式会社 垫圈及配有垫圈的多联阀
EP1717498A1 (fr) * 2005-04-28 2006-11-02 Bosch Rexroth Teknik AB Unité de montage de valve sur profils d'aluminium
WO2009065420A1 (fr) * 2007-11-20 2009-05-28 Festo Ag & Co. Kg Arrangement d'étanchéité et sous-ensemble fluidique équipé de celui-ci
WO2016124210A1 (fr) * 2015-02-04 2016-08-11 Festo Ag & Co. Kg Ensemble de soupape
DE102020102947A1 (de) 2020-02-05 2021-08-05 Bürkert Werke GmbH & Co. KG Anschlussbaugruppe für eine Ventileinheit und Ventileinheit
DE102020102947B4 (de) 2020-02-05 2024-01-18 Bürkert Werke GmbH & Co. KG Anschlussbaugruppe für eine Ventileinheit und Ventileinheit

Also Published As

Publication number Publication date
HU214385B (hu) 1998-03-30
DE59505682D1 (de) 1999-05-27
HUT70652A (en) 1995-10-30
EP0688958B1 (fr) 1999-04-21
DE9409788U1 (de) 1994-08-04

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