EP0426004B1 - Maschine zum Aufnehmen und Verteilen des Bettungsschotters - Google Patents

Maschine zum Aufnehmen und Verteilen des Bettungsschotters Download PDF

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Publication number
EP0426004B1
EP0426004B1 EP90120460A EP90120460A EP0426004B1 EP 0426004 B1 EP0426004 B1 EP 0426004B1 EP 90120460 A EP90120460 A EP 90120460A EP 90120460 A EP90120460 A EP 90120460A EP 0426004 B1 EP0426004 B1 EP 0426004B1
Authority
EP
European Patent Office
Prior art keywords
ballast
belt conveyor
region
machine according
machine
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
EP90120460A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0426004A1 (de
Inventor
Josef Theurer
Friedrich Oellerer
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.)
Franz Plasser Bahnbaumaschinen Industrie GmbH
Original Assignee
Franz Plasser Bahnbaumaschinen Industrie 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 Franz Plasser Bahnbaumaschinen Industrie GmbH filed Critical Franz Plasser Bahnbaumaschinen Industrie GmbH
Publication of EP0426004A1 publication Critical patent/EP0426004A1/de
Application granted granted Critical
Publication of EP0426004B1 publication Critical patent/EP0426004B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B27/00—Placing, renewing, working, cleaning, or taking-up the ballast, with or without concurrent work on the track; Devices therefor; Packing sleepers
    • E01B27/02—Placing the ballast; Making ballastway; Redistributing ballasting material; Machines or devices therefor; Levelling means
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2203/00—Devices for working the railway-superstructure
    • E01B2203/02—Removing or re-contouring ballast
    • E01B2203/027—Sweeping
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2203/00—Devices for working the railway-superstructure
    • E01B2203/03—Displacing or storing ballast
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2203/00—Devices for working the railway-superstructure
    • E01B2203/06—Placing ballast
    • E01B2203/065—Re-use of ballast
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2203/00—Devices for working the railway-superstructure
    • E01B2203/08—Levelling ballast or ground beneath
    • E01B2203/083—Ploughs

Definitions

  • the invention relates to a mobile ballast plow for picking up and distributing the ballast ballast of a track with a chassis frame supported on undercarriages, which with a e.g. is connected by a sweeping conveyor system with a ballast receiving device formed by a steep conveyor belt and a ballast silo that can be loaded with ballast with unloading openings, and with a ballast plow arrangement for distributing the ballast.
  • ballast plow has a height-adjustable center plow with baffles that can be adjusted about a vertical axis between its end-mounted running gear. This means that any type of ballast shifting and distribution within the entire width of the ballast bed is possible in the course of a one-time work trip.
  • This middle plow is preceded by a height and side adjustable side plow on each side of the machine for profiling the bedding edges.
  • a ballast silo is provided between the rear undercarriage and the middle plow or a driving cabin, which is equipped on its underside with hydraulically operated discharge openings. These enable the stored ballast to be dropped in sections of the track with insufficient ballast.
  • the ballast silo can be loaded with ballast by a steep conveyor belt arranged in the rear end area of the ballast plow, which is transported from the track or the ballast bed onto the steep conveyor belt by a sweeping conveyor system with two rotating brushes.
  • ballast compensation between track sections is admittedly possible feasible with too much or too little ballast, but due to the low storage capacity of the ballast silo, a corresponding number of also short sections with too little ballast must occur within a certain number of relatively short sections with too much ballast.
  • a ballast leveling machine which can be moved on the track is also known, with a height-adjustable middle plow arranged between the bogies and a sweeping conveyor system provided in the rear end region.
  • This is assigned a steep conveyor belt and a further conveyor belt that can be pivoted about a vertical axis and runs approximately horizontally to the front machine end area, the front area of which is still adjustable via a ballast transport wagon located in front of the machine.
  • the ballast that is thrown up by the sweeping conveyor system and is too much available can be dropped on the above-mentioned conveyor belt arrangement either onto an upstream ballast transport wagon or onto a ballast silo arranged in the front end of the machine.
  • too much existing ballast can be stored in larger quantities, but track sections with too little ballast can only be supplied with ballast via the relatively small ballast silo.
  • the object of the present invention is to provide a mobile machine of the type described at the outset for receiving and distributing the ballast ballast of a track, with which larger amounts of ballast can also be stored and, if necessary, can be thrown back onto the track with relatively little design effort.
  • ballast silo has at least one conveyor belt provided with a drive for ballast transport in the machine longitudinal direction above its floor surface or instead of the floor surface, in the discharge area of which the discharge openings are arranged.
  • ballast silo significantly larger amounts of ballast can be stored compared to the known silos, which can be transported at any time without any retooling work using the conveyor belt located in the floor area to the unloading openings for a necessary discharge on track sections with too little ballast.
  • new gravel had to be brought in for such long track sections with too little ballast by own loading wagons, while the ballast that was present on the other track sections was stored in the flank area.
  • ballast silo As a result of the longitudinal displacement of the stored ballast within the silo - with the discharge area of the steep conveyor belt unchanged - a very elongated design of the ballast silo with a lower height is possible for a high storage capacity and an unrestricted view of the operator for the purpose of an unobstructed transfer.
  • a further preferred embodiment of the invention consists in that a conveyor belt is provided which extends over the entire bottom surface of the ballast silo, the rear end of which in the transport direction is arranged in the region below the upper end of the steep conveyor belt which projects into the ballast silo.
  • the elongated ballast silo which is designed with the conveyor belt in its base region, can be arranged between the trolleys above a ballast plow arrangement formed from center and side plows.
  • a ballast plow arrangement formed from center and side plows.
  • an elevated cab is provided above the unloading openings located in the front end region of the conveyor belt.
  • a driver's cab advantageously provides unimpeded access to the front despite the substantially increased storage capacity of the ballast silo and track sections behind the machine. This results in a largely unrestricted observation of the corresponding track sections both for work assignments and for transfer journeys.
  • the unloading openings located below the driver's cab also permit at least partial observation of the thrown-up ballast from the driver's cab.
  • ballast silo with the conveyor belt arranged in the floor area and the sweeping conveyor system are arranged on a trailer articulated to the chassis frame of a ballast plow and are arranged on the track via a running gear arranged in the area of the sweeping conveyor system
  • Trailer driving end area of the machine is provided a driving cabin.
  • This articulated ballast plow enables the arrangement of a ballast silo with a particularly large storage capacity on the trailer, which can only be coupled to the ballast plow if necessary.
  • ballast plows that are already in use can be converted in this way with unlimited use of the advantages of the invention described at the beginning.
  • the ballast silo with the conveyor belt arranged in the floor area and the sweeping conveyor system can be arranged between two mutually spaced undercarriages of a trailer vehicle connected to a ballast plow.
  • a machine designed according to these features of the invention enables a particularly large storage capacity of the ballast silo.
  • a reduction of the axle loads can also be achieved through the two chassis of the trailer vehicle.
  • ballast silo together with the conveyor belt arranged in the floor area, is arranged between two supports of a trailer frame running parallel to one another and is fastened to the supports with its side walls.
  • the discharge openings arranged in the front end region of the conveyor belt are height-adjustable by means of a drive.
  • This height-adjustable design is particularly suitable for storage silos arranged in a lower position on the chassis frame, since in this case the unloading openings for transfer trips can be raised for safety reasons.
  • an advantageous further embodiment of the invention is that two conveyor belts arranged one behind the other in a common plane in the longitudinal direction of the machine and each having their own drive are provided in the floor area of the ballast silo, the unloading openings being arranged in the discharge area of the two immediately adjacent conveyor belt ends.
  • Such an arrangement of two conveyor belts is particularly advantageous when the ballast silo is particularly elongated, since in this way the transport route for complete emptying is halved.
  • a symmetrical weight distribution of the ballast stored in the ballast silo is possible.
  • a machine designed as a ballast plow 1 in FIG. 1 for receiving, distributing and profiling the ballast ballast has a chassis frame 2 which can be moved via bogie trolleys 3 on a track 6 formed from rails 4 and sleepers 5.
  • the ballast plow 1 has a drive 7 arranged between the undercarriages 3 and 7 Height-adjustable center plow 8 mounted on the chassis frame 2 and height and side adjustable side plows 9 arranged on each longitudinal side of the machine. These can be adjusted to any desired side angle from 0 to 45 ° using a side angle adjustment.
  • a sweeping conveyor system 13 which is height-adjustable via a drive 10 and has a sweeping brush 12 which is set in rotation via a drive 11, is arranged as a ballast receiving device.
  • a sweeping conveyor system 13 which is height-adjustable via a drive 10 and has a sweeping brush 12 which is set in rotation via a drive 11, is arranged as a ballast receiving device.
  • two steep conveyor belts 15 with drives 16 are arranged directly upstream.
  • the upper ends of these steep conveyor belts 15 forming a discharge point 17 project into an elongated ballast silo 18 connected to the chassis frame 2.
  • a conveyor belt 19 extending over the entire length of the ballast silo 18 is arranged instead of a floor surface.
  • an upper conveyor belt part 22 of the conveyor belt 19 can be transported in the direction indicated by an arrow 29 to the discharge openings 24 arranged at the end of the ballast silo 18 in the discharge area 23.
  • an elevated cab 25 with a central control device 26 is provided above the same.
  • the energy supply for a travel drive 27 and the various other drives is provided by an energy center 28.
  • ballast plow 1 When the ballast plow 1 is being used, excess ballast ballast is thrown up by the rotating sweeping brushes 12 onto the two steep conveyor belts 15 with the sweeping conveyor system 13 lowered, transported by these to the discharge point 17 and onto the rear end region of the conveyor belt 19 into the ballast silo 18 thrown off. As soon as the bulk cone of the thrown gravel reaches the upper ends of the silo side walls in this area, the drive 21 is briefly acted on. This results in the bedding ballast being shifted in the direction of an arrow 29 or in the direction of the unloading openings 24 until sufficient space is created in the region of the discharge point 17 for the discharge of further excess ballast.
  • the ballast silo 18 can be largely refilled.
  • the plowing work can be carried out unhindered by the use of the middle plow 8 and the two side plows 9.
  • the stored ballast is transported until it reaches the front discharge area 23 and is dropped onto the desired areas of the track via the now opened discharge openings 24.
  • the amount of the ballast thrown off can be controlled with the aid of hydraulically controllable outlet flaps, which are arranged in the end region of the discharge openings 24 and are not shown in detail.
  • the ballast thrown off the ballast silo 18 can advantageously be plowed in again by the subsequent ballast plow arrangement 30 to achieve the desired bedding profiling.
  • a further machine 31 shown in FIG. 3, for receiving, distributing and profiling the ballast bed of a track 32 consists of an in Working direction upstream gravel plow 33, which is articulated to a trailer vehicle 34.
  • This trailer vehicle 34 has between two mutually spaced undercarriages 35 an elongated ballast silo 36 which, instead of a floor surface, is equipped with two conveyor belts 39, 40 arranged one behind the other in a common plane in the machine longitudinal direction and each having its own drive 37, 38.
  • Unloading openings 41 are provided in the discharge area of the two immediately adjacent conveyor belt ends.
  • the ballast silo 36 is arranged together with the two conveyor belts 39, 40 between two mutually parallel and horizontally running supports 42 of a trailer frame 43 and fastened to these supports 42 with its side walls 44.
  • a sweeping conveyor system 46 with a rotatable sweeping brush 47 is provided as a ballast pick-up device by means of a drive 45.
  • the discharge area of a steep conveyor belt 48 which can be acted upon by a drive is located approximately above the unloading openings 41 arranged centrally with respect to the longitudinal direction of the ballast silo 36.
  • a driving or working cabin 49, 50 is located on the trailer frame 43 as well as on the ballast plow 33.
  • a plow arrangement formed from a central plow 51 and side plows 52 is provided for profiling the ballast ballast.
  • the machine 31 is moved by a traction drive 53.
  • the ballast thrown into the ballast silo 36 by the steep conveyor belt 48 is moved towards the front or rear end of the ballast silo by appropriately loading the two drives 37, 38 with the aid of the conveyor belts 39, 40 on the bottom 36 transported.
  • the hydraulically closable flaps of the discharge openings 41 are closed. If sections of the route are now used with too little gravel, the flaps mentioned in the Area of the discharge openings 41 opened and the two drives 37, 38 acted upon in the opposite direction of rotation.
  • ballast lying on the two conveyor belts is then transported from the front or rear end of the silo in the direction of the central unloading openings 41. If in the meantime track sections are processed with enough ballast, the ballast discharge can be stopped at any time by appropriately closing the unloading openings 41 and stopping the two conveyor belts 39, 40. Of course, the excess ballast can be thrown into the ballast silo 36 again, even in the case of sections of the route which in the meantime occur with too much ballast, with the start-up of the sweeping conveyor 46 and the steep conveyor belt 48, the unloading openings 41 also being closed. An operator located in the work or driving cabin 49 is able to closely observe the ballast discharge, the conveyor belts 39, 40, the unloading openings 41 and the track section adjoining the trailer vehicle 34 for the transfer journey.
  • a machine 54 shown in FIG. 4 for picking up, distributing and profiling the ballast ballast of a track 55 is composed of a ballast plow 57 arranged upstream in the working direction and supported on the track 55 by two undercarriages 56 spaced apart from one another and a trailer 58 with a ballast silo which is articulatedly connected thereto 59 together. Instead of a floor surface, this has a conveyor belt 60 with a drive 61. At the end of the ballast silo 59 opposite the steep conveyor belt 62, height-adjustable unloading openings 64 are arranged via drives 63.
  • a sweeping conveyor system 65 with a rotatable sweeping brush is assigned to the lower end region of the steep conveyor belt 62 to form a ballast pick-up device.
  • the one Working or driving cabin 66 and ballast plow 57 that can be moved via a travel drive 67 is equipped with a height-adjustable center plow 68 and height-adjustable and side-adjustable side plows 69.
  • the ballast silo 59 is arranged between two supports of a trailer frame 70 which run parallel to one another and is attached to these supports with its side walls.
  • the rear end of the trailer 58 is supported on the track 55 via a chassis 71.
  • a machine 72 shown in FIG. 5 for receiving and distributing the ballast ballast has an elongated chassis frame 73 with two rail bogies 74 and a driving cabin 75 and can be moved with the aid of its own travel drive 76.
  • a ballast silo 78 which has unloading openings 77 and is connected to the chassis frame 73, has a conveyor belt 81 which can be set in motion via a drive 80 above its base surface 79.
  • a ballast conveyor system 83 with a rotatable sweeping brush 84 and a ballast suction device 85 are assigned to the ballast silo 78 as ballast receiving device 82. This is located with its discharge area above the end of the conveyor belt 81 opposite the unloading openings 77.
  • the machine 72 can optionally be used completely independently of or in connection with a ballast plow for ballast compensation between track sections with too little or excess ballast.
  • ballast receiving device can also be formed, for example, from a dozer blade and a bucket chain for transporting up the ballast pent up in the area of the dozer blade.
  • This can also be done above the floor surface of the ballast silo Conveyor belt located can also be formed in the form of endless chains movable in the longitudinal direction of the machine, which are connected to driver elements running transversely to the chains.
  • the stored ballast would rest on the floor surface of the ballast silo and be transported in the direction of the unloading openings by means of the driver elements which can be displaced in the longitudinal direction.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Machines For Laying And Maintaining Railways (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Cleaning Of Streets, Tracks, Or Beaches (AREA)
  • Loading Or Unloading Of Vehicles (AREA)
  • Road Paving Machines (AREA)
EP90120460A 1989-10-31 1990-10-25 Maschine zum Aufnehmen und Verteilen des Bettungsschotters Expired - Lifetime EP0426004B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0251189A AT398213B (de) 1989-10-31 1989-10-31 Maschine zum aufnehmen und verteilen des bettungsschotters
AT2511/89 1989-10-31

Publications (2)

Publication Number Publication Date
EP0426004A1 EP0426004A1 (de) 1991-05-08
EP0426004B1 true EP0426004B1 (de) 1993-05-19

Family

ID=3535600

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90120460A Expired - Lifetime EP0426004B1 (de) 1989-10-31 1990-10-25 Maschine zum Aufnehmen und Verteilen des Bettungsschotters

Country Status (15)

Country Link
US (1) US5094018A (pl)
EP (1) EP0426004B1 (pl)
JP (1) JP2825336B2 (pl)
CN (1) CN1038956C (pl)
AT (1) AT398213B (pl)
AU (1) AU631022B2 (pl)
CA (1) CA2028542C (pl)
CZ (1) CZ280390B6 (pl)
DE (1) DE59001491D1 (pl)
ES (1) ES2041102T3 (pl)
HU (1) HU215418B (pl)
PL (1) PL163696B1 (pl)
RU (1) RU1777615C (pl)
SK (1) SK279084B6 (pl)
UA (1) UA13456A (pl)

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AT398096B (de) * 1992-04-29 1994-09-26 Plasser Bahnbaumasch Franz Anlage zur kontinuierlichen sanierung einer schotterbettung eines gleises
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EP0613980B1 (de) * 1993-03-04 1997-01-02 Franz Plasser Bahnbaumaschinen-Industriegesellschaft m.b.H. Schotterplaniermaschine
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US5437232A (en) * 1993-12-20 1995-08-01 Miner Enterprises, Inc. Ballast plow assembly for a hopper-type railroad car
EP0663472B1 (de) * 1994-01-05 1998-08-12 Franz Plasser Bahnbaumaschinen-Industriegesellschaft m.b.H. Maschine zur Reinigung der Schotterbettung eines Gleises
USRE35788E (en) * 1994-06-13 1998-05-12 Franz Plasser Bahnbaumaschinen-Industriegesellschaft M.B.H Method of and arrangement for rehabilitating a ballast bed of a track
US5579593A (en) * 1995-04-25 1996-12-03 Difco, Inc. Railroad ballast spreading (plow) system
US5657700A (en) * 1995-12-14 1997-08-19 Herzog Contracting Corporation Railroad hopper car with ballast distributing blades and remote control system
ES2218651T3 (es) * 1996-08-29 2004-11-16 Franz Plasser Bahnbaumaschinen- Industriegesellschaft M.B.H. Maquina para recoger material a granel situado sobre una via ferrea.
FR2759100B1 (fr) * 1997-02-04 1999-03-12 Desquenne & Giral Procede et engin pour deposer du ballast
ES2201431T3 (es) 1997-11-05 2004-03-16 Franz Plasser Bahnbaumaschinen- Industriegesellschaft M.B.H. Maquina niveladora de balasto y procedimiento para balastar una via.
US6209462B1 (en) * 1998-04-01 2001-04-03 Franz Plasser Bahnbaumaschinen-Industriegesellschaft M.B.H. Machine with ballast scarifying device
US6076288A (en) * 1998-04-02 2000-06-20 Ledcor Industries Limited Method and apparatus for burying cable in a railway bed
AT4464U3 (de) * 2001-04-26 2002-03-25 Plasser Bahnbaumasch Franz Reinigungsmaschine zur reinigung der schotterbettung eines gleises
AT5982U3 (de) * 2002-11-13 2003-12-29 Plasser Bahnbaumasch Franz Verfahren zur abtastung eines bettungsprofiles
EP2049733A2 (de) * 2006-04-10 2009-04-22 Matisa Materiel Industriel S.A. Speicherwagen
AT505909B1 (de) * 2007-11-27 2009-05-15 Plasser Bahnbaumasch Franz Verfahren und maschine zur verdichtung von schotter eines gleises
AT506300B1 (de) * 2008-02-26 2009-08-15 Plasser Bahnbaumasch Franz Verfahren zur sanierung einer schotterbettung eines gleises
AT507788B1 (de) * 2009-06-03 2010-08-15 Plasser Bahnbaumasch Franz Schotterpflug zum einschottern eines gleises
CA2776801C (en) * 2012-01-31 2019-11-05 Loewen Welding & Manufacturing Ltd. Apparatus for loading material
AT512914B1 (de) * 2012-06-22 2013-12-15 Plasser Bahnbaumasch Franz Schotterpflug
DE102014105740A1 (de) * 2014-04-23 2015-10-29 Geiger + Schüle Beteiligungs-Gmbh & Co. Kg Gleisbauwagen zur Auffüllung eines Schotterbettes
AT518225B1 (de) * 2016-01-29 2017-11-15 Plasser & Theurer Export Von Bahnbaumaschinen Gmbh Maschine mit einer Schotteraufnahmevorrichtung
AT519784B1 (de) * 2017-03-17 2019-11-15 Plasser & Theurer Export Von Bahnbaumaschinen Gmbh Maschine und Verfahren zum Profilieren und Verteilen von Schotter eines Gleises
CN111622176B (zh) * 2020-05-25 2022-04-12 福建省凡澈建设发展有限公司 一种水利河道护坡智能修筑设备及其修筑方法
CN113746033B (zh) * 2021-09-07 2022-11-01 浙江启明电力集团有限公司 一种用于海底电缆铺设的埋设犁机构

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AT375982B (de) * 1982-12-29 1984-09-25 Plasser Bahnbaumasch Franz Gleisverfahrbare foerderanlage fuer schuettgut
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AT287769B (de) * 1966-02-14 1971-02-10 Plasser Bahnbaumasch Franz Fahrbare Maschine zur Behandlung der Schotterbettung von Gleisen
AT312027B (de) * 1966-06-20 1973-12-10 Plasser Bahnbaumasch Franz Fahrbare Vorrichtung zur Behandlung der Schotterbettung von Gleisen
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Also Published As

Publication number Publication date
PL163696B1 (pl) 1994-04-29
CS531390A3 (en) 1992-04-15
CN1038956C (zh) 1998-07-01
CN1051406A (zh) 1991-05-15
DE59001491D1 (de) 1993-06-24
AT398213B (de) 1994-10-25
CA2028542A1 (en) 1991-05-01
HU215418B (hu) 1998-12-28
US5094018A (en) 1992-03-10
EP0426004A1 (de) 1991-05-08
CA2028542C (en) 2000-01-04
JP2825336B2 (ja) 1998-11-18
HUT56405A (en) 1991-08-28
UA13456A (uk) 1997-02-28
ATA251189A (de) 1994-02-15
ES2041102T3 (es) 1993-11-01
JPH03161601A (ja) 1991-07-11
AU631022B2 (en) 1992-11-12
PL287509A1 (en) 1991-10-21
CZ280390B6 (cs) 1996-01-17
AU6566390A (en) 1991-05-09
HU906929D0 (en) 1991-05-28
RU1777615C (ru) 1992-11-23
SK279084B6 (sk) 1998-06-03

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