WO1995027975A1 - Amortisseur des vibrations et du bruit - Google Patents

Amortisseur des vibrations et du bruit Download PDF

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Publication number
WO1995027975A1
WO1995027975A1 PCT/CZ1995/000004 CZ9500004W WO9527975A1 WO 1995027975 A1 WO1995027975 A1 WO 1995027975A1 CZ 9500004 W CZ9500004 W CZ 9500004W WO 9527975 A1 WO9527975 A1 WO 9527975A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
sheet
vibration
metal
layers
Prior art date
Application number
PCT/CZ1995/000004
Other languages
German (de)
English (en)
Inventor
Bohumil Volf
Günter Valient
Original Assignee
Z^¿Db A.S.
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
Priority to DE19580284A priority Critical patent/DE19580284C1/de
Priority to DE19580284D priority patent/DE19580284D2/de
Application filed by Z^¿Db A.S. filed Critical Z^¿Db A.S.
Priority to HU9602716A priority patent/HU221723B1/hu
Priority to SK1270-96A priority patent/SK127096A3/sk
Publication of WO1995027975A1 publication Critical patent/WO1995027975A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B17/00—Wheels characterised by rail-engaging elements
    • B60B17/0006—Construction of wheel bodies, e.g. disc wheels
    • B60B17/0013—Construction of wheel bodies, e.g. disc wheels formed by two or more axially spaced discs
    • B60B17/0017—Construction of wheel bodies, e.g. disc wheels formed by two or more axially spaced discs with insonorisation means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/30—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium with solid or semi-solid material, e.g. pasty masses, as damping medium
    • F16F9/306—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium with solid or semi-solid material, e.g. pasty masses, as damping medium of the constrained layer type, i.e. comprising one or more constrained viscoelastic layers
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/162—Selection of materials
    • G10K11/168—Plural layers of different materials, e.g. sandwiches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/05—5 or more layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/56—Damping, energy absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2311/00—Metals, their alloys or their compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/10—Trains

Definitions

  • This technical solution relates to the design and composition of a vibration and silencer to reduce the dynamic and sound effects in machine assemblies that form a certain vibration energy, such as wheels of rail vehicles, brake discs, bearings, etc.
  • vibrations of the components occur which are transmitted and form wave motion.
  • Each vibrating system forms a certain total energy of the vibrations, the higher this energy, the higher the dynamic effects of the system, which subsequently also form noises of different frequencies, which are called sound.
  • Dampers are used to reduce the total energy of the vibrations, which are the bodies which are connected to the main source of the vibrations by stiffening rings, screws, rivets or gluing.
  • the previously used vibration and silencers are formed by a conventional or a coating provided with schwingungsdä ender coating.
  • Other dampers are built as sheets with rubber layers in the middle or as absorbing segments made of metal plates and plastic materials. To increase the insulation effect, shape cuts are sometimes made in the sheet.
  • a disadvantage of these dampers is that they do not ensure insulation in the entire frequency band of the vibrations and that the insulation takes a long time.
  • the production of these dampers is usually complex and the costs are sometimes not in line with the results achieved. This means that the dynamic effects of the system are only unsatisfactorily eliminated, which shortens the life of the components. In the case of rubber application, there is also rubber aging and thus loss of elasticity.
  • a vibration and silencer which essentially consists in that it is formed from layers which are joined together, namely from more than one layer of the viscous-plastic mass, from one layer of the stretch metal sheet, at least from a further layer of the usual sheet metal or expanded metal sheet.
  • the individual metal layers are separated from one another by a layer of the viscous-plastic mass and the outer surfaces of the vibration and silencer are either formed by a layer of the viscous-plastic mass or a sheet or each layer of the expanded metal sheet in the vibration and silencer a metal mesh can be replaced.
  • the individual metal layers are protected against corrosion on the surface or made directly from corrosion-resistant material.
  • Your own damper can take the form of a round plate, an annular surface, a band or any other shape that corresponds to the shape of the vibrating body.
  • the damper is secured by the circlips and stiffening rings, screws, rivets or by gluing.
  • This vibration and sound damper dampens the vibrations in a wide frequency band and that the damping of the vibrations occurs in a short period of time, which substantially reduces the total energy of the vibrations in the machine assembly. It will prove to be due to lower vibrations amplitudes, reduced dynamic effects, increased component life and reduced sound levels.
  • Another advantage of the damper is that its shape and attachment can be adapted to the shape of the vibrating part and that it can also be retrofitted into the machine assemblies already in use.
  • Figures 1, 2, 3 and 4 show on average various modifications of the vibration and silencers, which are composed of layers of the expanded metal sheet, the usual sheet and the viscous-plastic mass.
  • Figure 5 shows the basic shape of the expanded metal sheet and its dimensional characteristics.
  • Fig. 6, 7 and 8 show different possible applications and fastening modalities of the vibration and silencers to the machine components. Examples of the implementation of the invention
  • the vibration and sound damper shown in Fig. 1 consists of a layer of expanded metal sheet 2, a layer of conventional sheet metal 3 and three layers of a viscous-plastic mass 4 . , two of which form the outer parts of the damper 1 and one which separates sheet metal layers connected by rivets.
  • the expanded metal sheet 2 has the basic shape, which is shown in Fig. 5, and its size is characterized by the mesh dimensions, the length A, the width C, the expanded width B and the sheet thickness D. 6 shows the actual fastening of the damper 1 to the wheel with the aid of a securing and stiffening ring 10 . shown.
  • the vibration and sound damper shown in Fig. 2 consists of two layers of expanded metal sheet 2 and a layer of conventional sheet 3 . , which are connected with screws and at the same time always with a layer of a viscous-plastic mass 4 . are separated, wherein the outer surfaces of the damper 1 are always formed by two further layers of the viscous-plastic mass 4.
  • the expanded metal sheet 2. is in the form shown in Fig. 5 and in Fig. 7 the attachment of the damper 1. to the wheel with countersunk screws 11 is shown.
  • the vibration and silencer shown in Figure 3 consists of two layers of the metal net 20 and three layers of the viscous-plastic mass 4 . , one of which separates the mutually connected layers of the metal mesh 0 and the remaining two, the outer surfaces of the damper 1.
  • the fastening of the damper 1 to a wheel with screws 1J2 is then shown in FIG. 7, the nuts forming a component of the wheel.
  • the vibration and silencer shown in FIG. 4 consists of two layers of expanded metal sheet 2 and two layers of conventional sheet metal 3 / that simultaneously form the outer surfaces of damper 1 . forms.
  • the individual sheet metal layers are then separated from one another by layers of a viscous-plastic mass 4 . Cut.
  • the expanded metal sheet 2 assumes the shape shown in FIG. 5 and in FIG. 8 the fastening of the dampers 1 is shown by gluing and clamping between the wheel components.
  • the vibration and muffler can preferably be used in wheels of rail vehicles, gear wheels, brake discs, bearings, pins and such components that have a large total energy of the vibrations.

Abstract

L'invention concerne un amortisseur des vibrations et du bruit, destiné à réduire les effets dynamiques et phoniques dans des constructions mécaniques auxquelles il est fixé au moyen de circlips et de bagues rigides, de vis ou de rivets, ou encore par collage. L'amortisseur est caractérisé en ce qu'il est formé de couches liées entre elles, à savoir, de plus d'une couche d'un matériau viscoplastique (4), une couche de tôle en métal déployé (2) et au moins une autre couche d'une tôle métallique de type courant (3) ou d'une tôle en métal déployé (2). Les différentes couches métalliques sont séparées les unes des autres par une couche de matériau viscoplastique (4), les faces extérieures de l'amortisseur étant formées soit par une couche de matériau viscoplastique (4), soit par une tôle métallique (2, 3). La tôle en métal déployé (2) de l'amortisseur (1) peut être remplacée par une toile métallique (20).
PCT/CZ1995/000004 1994-04-06 1995-04-06 Amortisseur des vibrations et du bruit WO1995027975A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE19580284A DE19580284C1 (de) 1994-04-06 1995-04-05 Schwingungs- und Schalldämpfer
DE19580284D DE19580284D2 (de) 1994-04-06 1995-04-05 Schwingungs- und Schalldämpfer
HU9602716A HU221723B1 (hu) 1994-04-06 1995-04-06 Rezgés- és zajcsillapító elem
SK1270-96A SK127096A3 (en) 1994-04-06 1995-04-06 Vibration and sound absorber

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZ94792A CZ285423B6 (cs) 1994-04-06 1994-04-06 Tlumič kmitů
CZPV792-94 1994-04-06

Publications (1)

Publication Number Publication Date
WO1995027975A1 true WO1995027975A1 (fr) 1995-10-19

Family

ID=5462265

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CZ1995/000004 WO1995027975A1 (fr) 1994-04-06 1995-04-06 Amortisseur des vibrations et du bruit

Country Status (8)

Country Link
AT (1) AT406098B (fr)
CZ (1) CZ285423B6 (fr)
DE (2) DE19580284D2 (fr)
HU (1) HU221723B1 (fr)
PL (1) PL316649A1 (fr)
SI (1) SI9520050A (fr)
SK (1) SK127096A3 (fr)
WO (1) WO1995027975A1 (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0823567A1 (fr) * 1996-08-08 1998-02-11 INTEC AACHEN INNOVATIVE TECHNOLOGIEN FÜR DIE BAUSANIERUNG, Dr. Honsinger & Dr. Breitbach Support élastique préfabriqué pour le support statique et dynamique des pièces de construction, machines ou équipement
WO2001010682A1 (fr) * 1999-08-07 2001-02-15 Volkswagen Aktiengesellschaft Revetement amortisseur de bruit et insonorisant d'un composant soumis a des vibrations
WO2003022568A1 (fr) * 2001-09-10 2003-03-20 Trelleborg Ab Materiau amortissant les vibrations et amortisseur de vibrations
WO2008006283A1 (fr) * 2006-07-06 2008-01-17 Xuejun Yin Construction d'amortissement et matériau composite amortisseur associé
AT502119B1 (de) * 2000-12-13 2008-07-15 Bonatrans Group A S Schwingungs- und schalldämpfer
WO2009027480A1 (fr) * 2007-08-31 2009-03-05 Thyssenkrupp Steel Ag Élément composite amortisseur de vibrations
WO2011020785A1 (fr) * 2009-08-19 2011-02-24 Poroson Gmbh Roue pour un véhicule sur rails
US8540842B2 (en) 2008-08-18 2013-09-24 Productive Research Llc Formable light weight composites
US8796580B2 (en) 2009-12-28 2014-08-05 Productive Research Processes for welding composite materials and articles therefrom
AT13741U1 (de) * 2013-02-28 2014-08-15 Siemens Ag Oesterreich Schallgedämpftes Rad für Schienenfahrzeuge
US9005768B2 (en) 2011-02-21 2015-04-14 Productive Research Composite materials including regions differing in properties and methods
US9115264B2 (en) 2010-02-15 2015-08-25 Productive Research Llc Delamination resistant, weldable and formable light weight composites
US9233526B2 (en) 2012-08-03 2016-01-12 Productive Research Llc Composites having improved interlayer adhesion and methods thereof
EP3614012A1 (fr) * 2018-08-14 2020-02-26 Robert Bosch GmbH Dispositif de plaque oscillante permettant de raccorder une machine à une fondation
US11338552B2 (en) 2019-02-15 2022-05-24 Productive Research Llc Composite materials, vehicle applications and methods thereof

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2834540B1 (fr) * 2002-01-04 2005-10-28 Bonatrans As Amortisseur de vibrations et de bruit
DE10260044A1 (de) * 2002-12-19 2004-07-08 Volkswagen Ag Torsionsschwingungsdämpfer
DE102007024356A1 (de) * 2007-05-24 2008-11-27 Siemens Ag Sandwich-Platte und deren Verwendung
DE102010053218B9 (de) * 2010-12-03 2014-04-17 Bochumer Verein Verkehrstechnik Gmbh Schienenrad
ES2824102B2 (es) * 2019-11-08 2022-05-27 La Prida Caballero Daniel De Absorbedor de sonido para ruedas de ferrocarril

Citations (10)

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Publication number Priority date Publication date Assignee Title
DE3006602A1 (de) * 1980-02-22 1981-08-27 Ernst Bohle Gmbh, 5270 Gummersbach Schallabsorptions-verbundplatte
US4297154A (en) * 1979-02-09 1981-10-27 National Steel Corporation Method of manufacturing expanded reinforcing sheet material
DE3017112A1 (de) * 1980-05-03 1981-11-05 Verseidag-Industrietextilien Gmbh, 4150 Krefeld Hohlraummatte und ihre herstellung
DE3022461A1 (de) * 1980-06-14 1981-12-24 Fa. Carl Freudenberg, 6940 Weinheim Mehrschichtige entdroehnbelagsbahn fuer karosseriebleche
US4367255A (en) * 1982-04-26 1983-01-04 Baker International Corporation Lining sheet
US4681816A (en) * 1984-06-26 1987-07-21 Mitsui Petrochemical Industries, Ltd. Composite laminates comprising a metallic substrate and vibration damper
EP0278248A2 (fr) * 1987-02-13 1988-08-17 Hoesch Stahl Aktiengesellschaft Matériau composite amortissant les vibrations et le bruit
DE3942103A1 (de) * 1988-12-26 1990-06-28 Benedito Salomao Cerqueira Boden, insbesondere fuer container und fahrzeugkarosserien
EP0510974A1 (fr) * 1991-04-24 1992-10-28 Nichias Corporation Matériau amortisseur de vibration
EP0619441A1 (fr) * 1993-04-05 1994-10-12 Toyota Jidosha Kabushiki Kaisha Système amortisseur de vibrations et son procédé de fabrication

Family Cites Families (2)

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Publication number Priority date Publication date Assignee Title
DE8424104U1 (de) * 1984-08-14 1984-11-15 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 4200 Oberhausen Koerperschalldaempfer fuer ein laufrad
US5200297A (en) * 1990-11-21 1993-04-06 Polaroid Corporation Laminar thermal imaging mediums, containing polymeric stress-absorbing layer, actuatable in response to intense image-forming radiation

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4297154A (en) * 1979-02-09 1981-10-27 National Steel Corporation Method of manufacturing expanded reinforcing sheet material
DE3006602A1 (de) * 1980-02-22 1981-08-27 Ernst Bohle Gmbh, 5270 Gummersbach Schallabsorptions-verbundplatte
DE3017112A1 (de) * 1980-05-03 1981-11-05 Verseidag-Industrietextilien Gmbh, 4150 Krefeld Hohlraummatte und ihre herstellung
DE3022461A1 (de) * 1980-06-14 1981-12-24 Fa. Carl Freudenberg, 6940 Weinheim Mehrschichtige entdroehnbelagsbahn fuer karosseriebleche
US4367255A (en) * 1982-04-26 1983-01-04 Baker International Corporation Lining sheet
US4681816A (en) * 1984-06-26 1987-07-21 Mitsui Petrochemical Industries, Ltd. Composite laminates comprising a metallic substrate and vibration damper
EP0278248A2 (fr) * 1987-02-13 1988-08-17 Hoesch Stahl Aktiengesellschaft Matériau composite amortissant les vibrations et le bruit
DE3942103A1 (de) * 1988-12-26 1990-06-28 Benedito Salomao Cerqueira Boden, insbesondere fuer container und fahrzeugkarosserien
EP0510974A1 (fr) * 1991-04-24 1992-10-28 Nichias Corporation Matériau amortisseur de vibration
EP0619441A1 (fr) * 1993-04-05 1994-10-12 Toyota Jidosha Kabushiki Kaisha Système amortisseur de vibrations et son procédé de fabrication

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0823567A1 (fr) * 1996-08-08 1998-02-11 INTEC AACHEN INNOVATIVE TECHNOLOGIEN FÜR DIE BAUSANIERUNG, Dr. Honsinger & Dr. Breitbach Support élastique préfabriqué pour le support statique et dynamique des pièces de construction, machines ou équipement
WO2001010682A1 (fr) * 1999-08-07 2001-02-15 Volkswagen Aktiengesellschaft Revetement amortisseur de bruit et insonorisant d'un composant soumis a des vibrations
AT502119B1 (de) * 2000-12-13 2008-07-15 Bonatrans Group A S Schwingungs- und schalldämpfer
WO2003022568A1 (fr) * 2001-09-10 2003-03-20 Trelleborg Ab Materiau amortissant les vibrations et amortisseur de vibrations
WO2008006283A1 (fr) * 2006-07-06 2008-01-17 Xuejun Yin Construction d'amortissement et matériau composite amortisseur associé
WO2009027480A1 (fr) * 2007-08-31 2009-03-05 Thyssenkrupp Steel Ag Élément composite amortisseur de vibrations
US9434134B2 (en) 2008-08-18 2016-09-06 Productive Research Llc Formable light weight composites
US8540842B2 (en) 2008-08-18 2013-09-24 Productive Research Llc Formable light weight composites
US9889634B2 (en) 2008-08-18 2018-02-13 Productive Research Llc Formable light weight composites
WO2011020785A1 (fr) * 2009-08-19 2011-02-24 Poroson Gmbh Roue pour un véhicule sur rails
US9239068B2 (en) 2009-12-28 2016-01-19 Productive Research Llc Processes for welding composite materials and articles therefrom
US8796580B2 (en) 2009-12-28 2014-08-05 Productive Research Processes for welding composite materials and articles therefrom
US11084253B2 (en) 2010-02-15 2021-08-10 Productive Research Llc Light weight composite material systems, polymeric materials, and methods
US10710338B2 (en) 2010-02-15 2020-07-14 Productive Research Llc Delamination resistant, weldable and formable light weight composites
US9415568B2 (en) 2010-02-15 2016-08-16 Productive Research Llc Formable light weight composite material systems and methods
US10457019B2 (en) 2010-02-15 2019-10-29 Productive Research Llc Light weight composite material systems, polymeric materials, and methods
US9849651B2 (en) 2010-02-15 2017-12-26 Productive Research Llc Formable light weight composite material systems and methods
US9115264B2 (en) 2010-02-15 2015-08-25 Productive Research Llc Delamination resistant, weldable and formable light weight composites
US11331880B2 (en) 2010-02-15 2022-05-17 Productive Research Llc Delamination resistant, weldable and formable light weight composites
US9981451B2 (en) 2010-02-15 2018-05-29 Productive Research Llc Delamination resistant, weldable and formable light weight composites
US9962909B2 (en) 2011-02-21 2018-05-08 Productive Research Llc Composite materials including regions differing properties, and methods
US9005768B2 (en) 2011-02-21 2015-04-14 Productive Research Composite materials including regions differing in properties and methods
US9233526B2 (en) 2012-08-03 2016-01-12 Productive Research Llc Composites having improved interlayer adhesion and methods thereof
AT13741U1 (de) * 2013-02-28 2014-08-15 Siemens Ag Oesterreich Schallgedämpftes Rad für Schienenfahrzeuge
EP3614012A1 (fr) * 2018-08-14 2020-02-26 Robert Bosch GmbH Dispositif de plaque oscillante permettant de raccorder une machine à une fondation
US11338552B2 (en) 2019-02-15 2022-05-24 Productive Research Llc Composite materials, vehicle applications and methods thereof

Also Published As

Publication number Publication date
CZ285423B6 (cs) 1999-08-11
SI9520050A (en) 1997-04-30
ATA903595A (de) 1999-06-15
CZ79294A3 (en) 1995-11-15
HUT76116A (en) 1997-06-30
SK127096A3 (en) 1997-08-06
HU9602716D0 (en) 1996-11-28
AT406098B (de) 2000-02-25
HU221723B1 (hu) 2002-12-28
PL316649A1 (en) 1997-02-03
DE19580284C1 (de) 1998-10-22
DE19580284D2 (de) 1997-09-18

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