EP0013895B1 - Driving device for loose carrying wheels on rail vehicles - Google Patents

Driving device for loose carrying wheels on rail vehicles Download PDF

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Publication number
EP0013895B1
EP0013895B1 EP80100073A EP80100073A EP0013895B1 EP 0013895 B1 EP0013895 B1 EP 0013895B1 EP 80100073 A EP80100073 A EP 80100073A EP 80100073 A EP80100073 A EP 80100073A EP 0013895 B1 EP0013895 B1 EP 0013895B1
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EP
European Patent Office
Prior art keywords
wheel
gearing
running
running wheels
shafts
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Expired
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EP80100073A
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German (de)
French (fr)
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EP0013895A1 (en
Inventor
Gerhard Korn
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ThyssenKrupp Technologies AG
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Thyssen Industrie AG
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Application filed by Thyssen Industrie AG filed Critical Thyssen Industrie AG
Priority to AT80100073T priority Critical patent/ATE14551T1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61C—LOCOMOTIVES; MOTOR RAILCARS
    • B61C9/00—Locomotives or motor railcars characterised by the type of transmission system used; Transmission systems specially adapted for locomotives or motor railcars
    • B61C9/38—Transmission systems in or for locomotives or motor railcars with electric motor propulsion
    • B61C9/48—Transmission systems in or for locomotives or motor railcars with electric motor propulsion with motors supported on vehicle frames and driving axles, e.g. axle or nose suspension
    • B61C9/50—Transmission systems in or for locomotives or motor railcars with electric motor propulsion with motors supported on vehicle frames and driving axles, e.g. axle or nose suspension in bogies

Definitions

  • the invention relates to a drive arrangement with a motor for two opposite, loose wheels of a rail vehicle, between which and a differential gear with shafts leading to the wheels is connected to one of the end faces of the motor housing lying in the direction of travel.
  • Such an axis is known from DE-A 2 353 256. Two of them form a bogie and are driven by a drive motor lying in the direction of travel, each via an angular gear arranged on the end faces thereof and via a hollow shaft surrounding the individual axes with play and corresponding connecting couplings.
  • the invention has for its object to eliminate the disadvantages of the known bogies with continuous axes. It consists in the fact that the motor housing has two independent runners and on the other end it has the same bevel gear for two further, loose wheels of a bogie, which is provided with spring-loaded rockers or pendulum frames for the wheels, which are vertically movably mounted and sprung on the middle part of the bogie by means of joints , wherein the shafts as cardan shafts are each assigned to a spur gear arranged on the bearing housing of the impellers, the drive wheel of which is connected to the cardan shaft and the driven wheel of which is connected to the impeller axis.
  • differential gear is designed as a limited slip differential.
  • the spur gear is designed as a planetary gear and is arranged in the impeller, the inner central wheel via a coupling with the propeller shaft, the planet carrier with the impeller or, if appropriate, via the bearing housing with the
  • the rocker arm (the pendulum frame) and the outer central wheel are connected to the rocker arm (the pendulum frame) or to the impeller via the bearing housing.
  • the drive unit can be manufactured in a compact design and can be installed in bogies with any desired wheelbase and track width using appropriate cardan shafts. Such a bogie is also considerably easier to maintain than the older known bogies. In most cases, the drive unit can be removed without lifting the trolley and pressing the wheels off. On the other hand, it is possible to remove the wheels for the purpose of changing the drum without having to press them off.
  • FIG. 1 shows a rotating part with different versions of the impeller drive in a schematic representation in horizontal cross section.
  • the motor housing 5 On the bogie middle part 1, the motor housing 5 is arranged in the direction of travel, which carries an angular gear 6 on each end.
  • a locking differential gear 8 is mounted in the housings of the angular gear 6, each driven by a ring gear 7.
  • the output shafts 9 of these gears, on each of which a brake disc 10 is arranged, are connected via the cardan shafts 11 and two clutches 12 to the impellers 4 and 4a.
  • two mutually independent rotors can be arranged in the motor housing 5, each of which drives an angular gear 6 (indicated by dashed lines).
  • a normal spur gear 13/14 (bottom left) or a spur gear with ring gear 13a / 14a (bottom right) is arranged on the rockers 2, the drive wheels 13 / 13a connected to the associated clutch 12 and the driven wheels 14 / 14a are placed directly on the axis of the impeller 4.
  • the spur gear is designed as a planetary gear 15, which is arranged in the impeller 4a, the inner central wheel 16 being connected to the clutch 12 and via this to the cardan shaft 11.
  • the planet carrier 17 with the impeller 4a and the central wheel 18, through the hollow wheel axle 19 are connected to the rocker arm 2 via the bearing housing 20 of the wheel bearing.
  • the planet carrier 17a is connected through the hollow wheel axle 19, via the bearing housing 20 to the rocker arm 2 and the outer central wheel 18a to the impeller 4a.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Retarders (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Platform Screen Doors And Railroad Systems (AREA)
  • Chain Conveyers (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

1. Drive arrangement with a motor for two movable running wheels (4 ; 4a) of a rail vehicle which are situated opposite one another and between which and a bevel gearing (6) flangemounted on one end face of the motor housing (5), which housing is disposed in the direction of travel, there is interposed a differential gearing (8) with shafts (11) going out to the running wheels, characterized in that the motor housing (5) has two rotors independent of one another, and at the other end face a similar bevel gearing (6) for two further movable running wheels of a bogie which is provided with sprung rockers (2) or swingable frames for the running wheels, said rockers or frames being mounted to be vertically movable on the bogie middle part (1) by means of pivotable joints (3), the shafts (11) as cardan shafts being associated each with a spur-wheel gearing (13, 14 and 13a, 14a) arranged on the bearing housing of the running wheels, the drive input wheel (13 ; 13a) of this gearing being connected to the cardan shaft (11) and the drive output wheel (14 ; 14a) to the running wheel axle.

Description

Die Erfindung bezieht sich auf eine Antriebsanordnung mit einem Motor für zwei einander gegenüberliegende, lose Laufräder eines Schienenfahrzeuges, zwischen denen und einem an der einen Stirnseite des in Fahrtrichtung liegenden Motorgehäuses angeflanschten Winkelgetriebe ein Differentialgetriebe mit zu den Laufrädern abgehenden Wellen eingeschaltet ist.The invention relates to a drive arrangement with a motor for two opposite, loose wheels of a rail vehicle, between which and a differential gear with shafts leading to the wheels is connected to one of the end faces of the motor housing lying in the direction of travel.

Eine derartige Anordnung ist für den Antrieb einer einzelnen Achse durch die DE-C-468708 bekannt. Bei ihr sitzen die für sich drehbaren Laufräder auf einer durchgehenden festen Achse, die auch noch der tatzlagerartigen Abstützung des Motor-Getriebe-Blocks dient. Letzterer ist am Fahrzeugrahmen federnd aufgehängt. Diese Merkmale bedingen gegenüber festverankerten Antrieben eine aufwendige Konstruktion. Als an sich vermeidbare Nachteile kommen hinzu, daß die durchgehende feste Achse die nicht abgefederten Massen vergrößert und die Laufräder aus der vertikalen Laufebene in eine Schiefstellung drängt, wenn Gleisunebenheiten überfahren werden. Dadurch ergibt sich ein unruhiges Laufverhalten.Such an arrangement is known for driving a single axis by DE-C-468708. With it, the rotatable wheels sit on a continuous fixed axle, which also serves as a support for the engine gearbox block. The latter is resiliently suspended from the vehicle frame. Compared to firmly anchored drives, these features require a complex construction. Disadvantages that are avoidable in addition are that the continuous fixed axis increases the unsprung masses and urges the running wheels from the vertical running plane into an inclined position when uneven tracks are run over. This results in a restless running behavior.

Es sind ferner weniger aufwendige Bauweisen bekannt, bei denen die über eine starre Achse miteinander fest verbundenen Laufräder selbst durch die kegelartige Neigung ihres Radkranzes bei Kurvenfahrten die verschiedenen Weglängen ausgleichen. Dieser Längenausgleich ist mit einer mehr oder weniger großen Gleitreibung, mit Spurkranz- bzw. Bandagenverschleiß und u. U. unliebsamen Quietschgeräuschen verbunden.There are also less elaborate designs known, in which the wheels, which are firmly connected to one another via a rigid axle, compensate for the different path lengths even by the conical inclination of their wheel rim when cornering. This length compensation is with a more or less large sliding friction, with flange or bandage wear and u. U. Unpleasant squeaking connected.

Eine derartige Achse ist durch die DE-A 2 353 256 bekannt. Zwei von ihr bilden ein Drehgestell und sind mit einem in Fahrtrichtung liegenden Antriebsmotor über je ein an dessen Stirnseiten angeordnetes Winkelgetriebe und über je eine die einzelnen Achsen mit Spiel umgebende Hohlwelle und entsprechende Anschlußkupplungen angetrieben.Such an axis is known from DE-A 2 353 256. Two of them form a bogie and are driven by a drive motor lying in the direction of travel, each via an angular gear arranged on the end faces thereof and via a hollow shaft surrounding the individual axes with play and corresponding connecting couplings.

Der Erfindung liegt die Aufgabe zugrunde, die Nachteile der bekannten Drehgestelle mit durchgehenden Achsen zu beseitigen. Sie besteht darin, daß das Motorgehäuse zwei voneinander unabhängige Läufer und an der anderen Stirnseite ein gleiches Winkelgetriebe für zwei weitere, lose Laufräder eines Drehgestells aufweist, das mit am Drehgestell-Mittelteil mittels Gelenke vertikal beweglich gelagerten und abgefederten Schwingen oder Pendelrahmen für die Laufräder versehen ist, wobei die Wellen als Kardanwellen jeweils einem am Lagergehäuse der Laufräder angeordneten Stirnradgetriebe zugeordnet sind, dessen Antriebsrad mit der Kardanwelle und dessen Abtriebsrad mit der Laufradachse verbunden ist.The invention has for its object to eliminate the disadvantages of the known bogies with continuous axes. It consists in the fact that the motor housing has two independent runners and on the other end it has the same bevel gear for two further, loose wheels of a bogie, which is provided with spring-loaded rockers or pendulum frames for the wheels, which are vertically movably mounted and sprung on the middle part of the bogie by means of joints , wherein the shafts as cardan shafts are each assigned to a spur gear arranged on the bearing housing of the impellers, the drive wheel of which is connected to the cardan shaft and the driven wheel of which is connected to the impeller axis.

Es ist zwar durch die DE-A 2 258 645 bekannt, in einem Motorgehäuse zwei voneinander unabhängige Läufer vorzusehen, und an beiden Stirnseiten des Gehäuses Winkelgetriebe für jeweils ein Laufradpaar anzuordnen. Diese Anordnung ist allerdings im Zuge des Ausgleichs der Drehmomente bekanntgeworden, die durch die zwei Läufer erzeugt werden.It is known from DE-A 2 258 645 to provide two mutually independent runners in a motor housing, and to arrange angular gears for each pair of impellers on both end faces of the housing. However, this arrangement has become known in the course of balancing the torques that are generated by the two rotors.

Eine weitere Ausgestaltung der Erfindung besteht darin, daß das Differentialgetriebe als Sperrdifferentialgetriebe ausgebildet ist.Another embodiment of the invention is that the differential gear is designed as a limited slip differential.

Eine besondere Ausführungsform der Erfindung ist schließlich darin zu sehen, daß im Falle notwendiger großer Untersetzungen das Stirnradgetriebe als Planetengetriebe ausgebildet und im Laufrad angeordnet ist, wobei das innere Zentralrad über eine Kupplung mit der Kardanwelle der Planetenträger mit dem Laufrad oder gegebenenfalls über das Lagergehäuse mit der Schwinge (dem Pendelrahmen) und das äußere Zentralrad gegebenenfalls über das Lagergehäuse mit der Schwinge (dem Pendelrahmen) oder mit dem Laufrad verbunden sind.Finally, a special embodiment of the invention is to be seen in the fact that, in the case of necessary large reductions, the spur gear is designed as a planetary gear and is arranged in the impeller, the inner central wheel via a coupling with the propeller shaft, the planet carrier with the impeller or, if appropriate, via the bearing housing with the The rocker arm (the pendulum frame) and the outer central wheel are connected to the rocker arm (the pendulum frame) or to the impeller via the bearing housing.

Durch die erfindungsgemäße Anordnung wird nicht nur ein guter Kurvenlauf der Laufräder erreicht, sondern es tritt auch eine wesentliche Gewichtsersparnis gegenüber den Drehgestellen des Standes der Technik ein. Ein weiterer Vorteil besteht darin, daß das Antriebsaggregat in kompakter Bauweise herstellbar ist und unter Verwendung entsprechender Kardanwellen in Drehgestelle mit jedem gewünschten Radstand und jeder Spurweite eingebaut werden kann. Auch ist ein solches Drehgestell erheblich wartungsfreundlicher als die älteren bekannten Drehgestelle. Das Antriebsaggregat kann in den meisten Fällen ohne Heben des Wagens und Abpressen der Räder ausgebaut werden. Andererseits ist es möglich, die Räder zum Zwecke des Bandagenwechsels auszubauen, ohne sie abpressen zu müssen.As a result of the arrangement according to the invention, not only is the running wheels good cornering, but there is also a substantial weight saving compared to the bogies of the prior art. Another advantage is that the drive unit can be manufactured in a compact design and can be installed in bogies with any desired wheelbase and track width using appropriate cardan shafts. Such a bogie is also considerably easier to maintain than the older known bogies. In most cases, the drive unit can be removed without lifting the trolley and pressing the wheels off. On the other hand, it is possible to remove the wheels for the purpose of changing the drum without having to press them off.

In der Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt. Sie zeigt ein Drehgesteil mit verschiedenen Ausführungen des Laufradantriebes in schematischer Darstellung im horizontalen Querschnitt.Exemplary embodiments of the invention are shown in the drawing. It shows a rotating part with different versions of the impeller drive in a schematic representation in horizontal cross section.

Es bezeichnet 1 das Drehgestell-Mittelteil, an dem die vier Schwingen 2 angeordnet sind, die um die Gelenke 3 in Radebene schwingen können und gegenüber dem Drehgestell-Mittelteil 1 in bekannter Weise gefedert abgestützt sind. In den Schwingen 2 sind die Laufräder 4 und 4a gelagert.It designates 1 the middle part of the bogie, on which the four rockers 2 are arranged, which can swing about the joints 3 in the wheel plane and are spring-supported in a known manner relative to the middle part of the bogie. The wheels 4 and 4a are mounted in the rockers 2.

Auf dem Drehgestell-Mittelteil 1 ist in Fahrtrichtung das Motorgehäuse 5 angeordnet, das an den Stirnseiten je ein Winkelgetriebe 6 trägt. In den Gehäusen der Winkelgetriebe 6 ist, angetrieben jeweils von einem Tellerrad 7, je ein Sperr-Differentialgetriebe 8 gelagert. Die abtreibenden Wellen 9 dieser Getriebe, auf denen je eine Bremsscheibe 10 angeordnet ist, sind über die Kardanwellen 11 und je zwei Kupplungen 12 mit den Laufrädern 4 und 4a verbunden. Statt eines Motors mit einem nach zwei Seiten abtreibenden Läufer, können im Motorgehäuse 5 zwei voneinander unabhängige Läufer angeordnet sein, von denen jeder ein Winkelgetriebe 6 antreibt (gestrichelt angedeutet).On the bogie middle part 1, the motor housing 5 is arranged in the direction of travel, which carries an angular gear 6 on each end. A locking differential gear 8 is mounted in the housings of the angular gear 6, each driven by a ring gear 7. The output shafts 9 of these gears, on each of which a brake disc 10 is arranged, are connected via the cardan shafts 11 and two clutches 12 to the impellers 4 and 4a. Instead of a motor with a rotor that drifts to two sides, two mutually independent rotors can be arranged in the motor housing 5, each of which drives an angular gear 6 (indicated by dashed lines).

Bei den unten dargestellten Antriebsausbildungen ist auf den Schwingen 2 ein normales Stirnradgetriebe 13/14 (unten links) bzw. ein Stirnradgetriebe mit Hohlrad 13a/14a (unten rechts) angeordnet, wobei die Antriebsräder 13/ 13a mit der zugehörigen Kupplung 12 verbunden und die Abtriebsräder 14/14a unmittelbar auf die Achse des Laufrades 4 aufgesetzt sind.In the drive designs shown below, a normal spur gear 13/14 (bottom left) or a spur gear with ring gear 13a / 14a (bottom right) is arranged on the rockers 2, the drive wheels 13 / 13a connected to the associated clutch 12 and the driven wheels 14 / 14a are placed directly on the axis of the impeller 4.

Bei der oben rechts dargestellten Antriebsausbildung ist das Stirnradgetriebe als Planetengetriebe 15 ausgebildet, welches im Laufrad 4a angeordnet ist, wobei das innere Zentralrad 16 mit der Kupplung 12 und über diese mit der Kardanwelle 11 verbunden ist. Im oberen Teilschnitt des Planetengetriebes 15 sind der Planetenträger 17 mit dem Laufrad 4a und das Zentralrad 18, durch die hohle Radachse 19 hindurch, über das Lagergehäuse 20 des Radlagers mit der Schwinge 2 verbunden. Im unteren Teilschnitt des Planetengetriebes 15 ist der Planetenträger 17a, durch die hohle Radachse 19 hindurch, über das Lagergehäuse 20 mit der Schwinge 2 sowie das äußere Zentralrad 18a mit dem Laufrad 4a verbunden. Bei dieser Antriebsausbildung ergibt sich eine sehr kompakte Bauweise des Untersetzungsgetriebes. Der Durchmesser eines solchen Planetengetriebes ist so klein, daß es ohne weiteres in Laufräder üblicher Größe eingebaut werden kann; die Bodenfreiheit des Fahrzeugs wird durch eine derartige Antriebsanordnung nicht beeinträchtigt.In the drive configuration shown at the top right, the spur gear is designed as a planetary gear 15, which is arranged in the impeller 4a, the inner central wheel 16 being connected to the clutch 12 and via this to the cardan shaft 11. In the upper partial section of the planetary gear 15, the planet carrier 17 with the impeller 4a and the central wheel 18, through the hollow wheel axle 19, are connected to the rocker arm 2 via the bearing housing 20 of the wheel bearing. In the lower partial section of the planetary gear 15, the planet carrier 17a is connected through the hollow wheel axle 19, via the bearing housing 20 to the rocker arm 2 and the outer central wheel 18a to the impeller 4a. This drive design results in a very compact design of the reduction gear. The diameter of such a planetary gear is so small that it can easily be installed in conventional sized impellers; The ground clearance of the vehicle is not affected by such a drive arrangement.

Ohne das wesentliche des Erfindungsgegen standes zu verändern, ist es möglich, anstelle des Winkelgetriebes ein zweistufiges Kegel-Stirnradgetriebe einzusetzen.Without changing the essence of the subject matter of the invention, it is possible to use a two-stage bevel helical gear instead of the bevel gear.

Claims (4)

1. Drive arrangement with a motor for two movable running wheels-(4; 4a) of a rail vehicle which are situated opposite one another and between which and a bevel gearing (6) flange- mounted on one end face of the motor housing (5), which housing is disposed in the direction of travel, there is interposed a differential gearing (8) with shafts (11) going out to the running wheels, characterised in that the motor housing (5) has two rotors independent of one another, and at the other end face a similar bevel gearing (6) for two further movable running wheels of a bogie which is provided with sprung rockers (2) or swingable frames for the running wheels, said rockers or frames being mounted to be vertically movable on the bogie middle part (1) by means of pivotable joints (3), the shafts (11) as cardan shafts being associated each with a spur-wheel gearing (13, 14 and 13a, 14a) arranged on the bearing housing of the running wheels, the drive input wheel (13; 13a) of this gearing being connected to the cardan shaft (11) and the drive output wheel (14; 14a) to the running wheel axle.
2. Bogie according to claim 1, characterised in that the differential gearing (8) is constructed as a locking differential.
3. Bogie according to claim 1 or 2, characterised in that the spur-wheel gearing is constructed as a planetary gearing (15) and is arranged in the running wheel (4a), the inner central gearwheel (16) being connected through the hollow-construction wheel axle (19) by means of the coupling (12) to the cardan (11), and the planet wheel carrier (17) being connected to the running wheel (4a) and also the outer central wheel (18) being connected to the rocker (2) or the like through the wheel axle (19), via the bearing housing (20) if appropriate.
4. Bogie according to one of claims 1 or 2, characterised in that the spur-wheel gearing is constructed as a planetary gearing (15) and is arranged in the running wheel (4a), the inner central gearwheel (16) being connected to the cardan shaft (11) by means of the coupling (12), through the hollow-construction wheel axle (19), and the planet-wheel carrier (17a) being connected to the rocker (2) or the like through the hollow wheel axle (19), possibly via the bearing housing (20), and also the outer central gearwheel (18a) being connected to the running wheel (4a). -
EP80100073A 1979-01-19 1980-01-08 Driving device for loose carrying wheels on rail vehicles Expired EP0013895B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80100073T ATE14551T1 (en) 1979-01-19 1980-01-08 DRIVE ARRANGEMENT FOR LOOSE WHEELS OF A RAIL VEHICLE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2901989 1979-01-19
DE19792901989 DE2901989A1 (en) 1979-01-19 1979-01-19 BOGE FOR RAILWAY VEHICLES LIKE TRAMS OR THE LIKE.

Publications (2)

Publication Number Publication Date
EP0013895A1 EP0013895A1 (en) 1980-08-06
EP0013895B1 true EP0013895B1 (en) 1985-07-31

Family

ID=6060926

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80100073A Expired EP0013895B1 (en) 1979-01-19 1980-01-08 Driving device for loose carrying wheels on rail vehicles

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EP (1) EP0013895B1 (en)
AT (1) ATE14551T1 (en)
DE (2) DE2901989A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2936771C2 (en) * 1979-09-12 1982-11-18 Thyssen Industrie Ag, 4300 Essen Drive bogie for rail vehicles, e.g. trams
DE3025278A1 (en) * 1980-07-01 1982-01-21 Siemens AG, 1000 Berlin und 8000 München RAIL-MOUNTED ELECTRIC MOTOR VEHICLE
DE3047412A1 (en) * 1980-12-17 1982-07-15 Thyssen Industrie Ag, 4300 Essen DISC BRAKE ARRANGEMENT ON A RAIL VEHICLE
DE3140167A1 (en) * 1981-10-08 1983-04-28 Siemens AG, 1000 Berlin und 8000 München DOUBLE AXLE LENGTH DRIVE FOR AN ELECTRIC RAIL DRIVE VEHICLE
GB8303755D0 (en) * 1983-02-10 1983-03-16 Lucas Ind Plc Disc brakes
ES2133224B1 (en) * 1996-08-14 2000-04-16 Talgo Patentes "BOGIE TRACTOR WITH BUILT-IN WIDTH CHANGE SYSTEM"
FR2822780B1 (en) 2001-04-02 2003-05-16 Alstom BOGIE FOR RAILWAY VEHICLES WITH VARIABLE WIDTH WHEELS
DE10208541A1 (en) * 2002-02-27 2003-09-04 Siemens Ag Driven lane change undercarriage for rail vehicles

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE468708C (en) * 1927-04-09 1928-11-19 Bbc Brown Boveri & Cie Drive for rail vehicles with drive wheels rotatably mounted on a fixed axle
US1895368A (en) * 1927-05-23 1933-01-24 Blackhall John Robert Truck
FR1527672A (en) * 1964-08-22 1968-06-07 Driving axle
FR2187062A5 (en) * 1972-05-30 1974-01-11 Frangeco A N F
DE2610054C3 (en) * 1976-03-11 1980-05-14 Thyssen Industrie Ag, 4300 Essen Drive arrangement for wheel sets of rail locomotives

Also Published As

Publication number Publication date
DE3070909D1 (en) 1985-09-05
ATE14551T1 (en) 1985-08-15
EP0013895A1 (en) 1980-08-06
DE2901989A1 (en) 1980-08-07

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