EP0105222B1 - Axial piston machine - Google Patents
Axial piston machine Download PDFInfo
- Publication number
- EP0105222B1 EP0105222B1 EP83108866A EP83108866A EP0105222B1 EP 0105222 B1 EP0105222 B1 EP 0105222B1 EP 83108866 A EP83108866 A EP 83108866A EP 83108866 A EP83108866 A EP 83108866A EP 0105222 B1 EP0105222 B1 EP 0105222B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- axial piston
- machine housing
- bearing box
- cylinder block
- ring
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
- F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
Definitions
- the invention relates to an axial piston machine according to the preamble of the main claim in the swashplate design.
- the pistons of an axial piston machine of swash plate design, supported on an inclined swash plate, are not sealed against the cylinder bores by leakage-free sealing elements, because a certain leakage flow is necessary for the lubrication of the piston sliding surfaces. Due to a leakage gap between the piston and the cylinder wall, a certain amount of the pumped medium constantly flows as leakage flow into the machine housing, from where it is returned to the tank.
- the volume of the leakage current is dependent on various influencing variables, the viscosity of the delivery medium being particularly important in relation to the present invention.
- a pump is to be used to pump a low-viscosity medium, such as water or HFA liquids (95-97% water, 5-3% lubricant additive)
- a low-viscosity medium such as water or HFA liquids (95-97% water, 5-3% lubricant additive)
- HFA liquids 95-97% water, 5-3% lubricant additive
- a swash plate type axial piston machine in which the drum-shaped cylinder block within a machine housing is connected to a drive shaft supported on the outside in a bearing housing on two roller bearings.
- the outer surface of the cylinder block is supported on a slide bearing on the inside of the machine housing.
- the pumped medium flows freely into the machine housing and passes into the bearing housing through specially provided channels. Both the plain bearing of the cylinder block and the roller bearings of the drive shaft are washed by the medium. Since the bearings are not sealed against the pumped medium, this axial piston machine is also not suitable for operation with HFA liquids or water.
- the present invention has for its object to provide a swash plate type axial piston machine which is simple in construction and is suitable for conveying low-viscosity media.
- the axial piston machine has a bearing housing for the bearings of the drive shaft and a machine housing for receiving the pump body.
- the pumped medium and the shaft bearings are housed in separate rooms and sealed independently of one another in a suitable manner.
- the bearing housing filled with a suitable lubricant, such as grease is sealed with radial shaft seals, while the machine housing filled with leakage fluid is sealed off from the drive shaft by a mechanical seal with a standing and a rotating ring, which slide against one another in a sealing manner.
- the forces which are effective during operation are advantageously divided because all the axial forces are transmitted to the machine housing, so that the roller bearings in the bearing housing are only loaded by radial forces.
- the compact, space-saving design allows simple, problem-free assembly and disassembly, because after loosening the fastening screws connecting the housing, the pump body housed in the machine housing can be easily removed from the drive shaft.
- the drive shaft of the axial piston machine is mounted outside of the machine housing 2 in its own bearing housing 3 and is supported on two roller bearings 4 and 5 in its middle length range.
- the bearing housing 3 is closed on the drive side with a bearing cover 6 and on the side adjacent to the machine housing by a flange-shaped bush 7 and sealed by radial shaft seals 8 and 9 inserted therein.
- the bearing housing 3 is filled with a suitable lubricant.
- a drum-shaped cylinder block 10 in the pump housing 2 is driven by the drive shaft 1.
- the free end of the drive shaft 1 protruding into the machine housing 2 is provided with serration 11, which engages in a corresponding toothing on the inner wall of the cylinder block 10.
- a certain number of axially directed cylinder bores 12 are in the cylinder block 10 arranged in a circle to the axis of rotation at the same angular distance from each other.
- each cylinder bore 12 there is a longitudinally displaceable piston 13 which is slidably supported with a piston shoe 14 on an inclined, fixed swash plate 15.
- This is mounted independently of the drive shaft 1, which is guided centrally at a lateral distance, on pins 16 arranged at right angles thereto in the machine housing, the inclination angle of the swash plate 15 being adjustable.
- the end face of the cylinder block 10 bears against a fixed control plate 17 which is spherically shaped and in which there are two control openings which are kidney-shaped in cross section.
- a fixed control plate 17 which is spherically shaped and in which there are two control openings which are kidney-shaped in cross section.
- a leakage gap is formed between the cylinder bores 12 and the pistons 13, through which a small amount of the conveyed medium from the cylinder block 10 enters the machine housing 2 with each pressure stroke. This leakage liquid is returned via the leak connection 21 to the tank, not shown.
- the machine housing 2 is sealed off from the bearing housing 3 by a mechanical seal 22, 23, the rotating ring 22 of which is fastened to the drive shaft 1 and the standing ring 23 of which is inserted into the bush 7 opposite the swash plate 15.
- the space between the radial shaft seal 8 which seals the bearing housing 3 and the standing ring 23 of the mechanical seal 22, 23 which seals the machine housing 2 is connected to a ventilation duct 24 leading to the outside.
- the machine housing 2 is screwed to the outside of the bearing housing 3 in the area of the mechanical seal 22, 23.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
Description
Die Erfindung betrifft eine Axialkolbenmaschine gemäss dem Oberbegriff des Hauptanspruches in Schrägscheibenbauart.The invention relates to an axial piston machine according to the preamble of the main claim in the swashplate design.
Die auf einer geneigt angeordneten Schrägscheibe abgestützten Kolben einer Axialkolbenmaschine in Schrägscheibenbauart sind gegenüber den Zylinderbohrungen nicht durch leckstromfreie Dichtelemente abgedichtet, weil ein bestimmter Leckstrom für die Schmierung der Kolbengleitflächen notwendig ist. Durch einen Leckspalt zwischen dem Kolben und der Zylinderwandung fliesst deshalb ständig eine gewisse Menge des Fördermediums als Leckstrom in das Maschinengehäuse, von wo es zum Tank zurückgeleitet wird. Das Volumen des Leckstromes ist von verschiedenen Einflussgrössen abhängig, wobei es in Bezug auf die vorliegende Erfindung insbesondere auf die Viskosität des Fördermediums ankommt. Soll beispielsweise mit einer Pumpe ein niederviskoses Medium, wie Wasser oder HFA-Flüssigkeiten (95-97% Wasser, 5-3% Schmiermittelzusatz) gefördert werden, dann stellt sich vor allem das Problem der Abdichtung der überaus empfindlichen Lager von der Antriebswelle, die bei leistungsstarken Pumpen einer sehr sorgfältigen Schmierung bedürfen. Die Abdichtung der an dem der Antriebsseite gegenüberliegenden Ende der Antriebswelle im Maschinengehäuse angeordneten Wellenlager gegen Wasser ist aber sehr aufwendig und führt zu einer Vergrösserung der Baulänge und des Bauvolumens der Pumpe, weil die Vergrösserung der Stützweite eine höhere Wellendurchbiegung zur Folge hat, die infolgedessen verstärkt werden muss. Deshalb sind leistungsstarke Axialkolbenmaschinen in Schrägscheibenbauart bisher noch nicht zur Förderung von Wasser oder anderen niederviskosen Medien verwendet worden.The pistons of an axial piston machine of swash plate design, supported on an inclined swash plate, are not sealed against the cylinder bores by leakage-free sealing elements, because a certain leakage flow is necessary for the lubrication of the piston sliding surfaces. Due to a leakage gap between the piston and the cylinder wall, a certain amount of the pumped medium constantly flows as leakage flow into the machine housing, from where it is returned to the tank. The volume of the leakage current is dependent on various influencing variables, the viscosity of the delivery medium being particularly important in relation to the present invention. If, for example, a pump is to be used to pump a low-viscosity medium, such as water or HFA liquids (95-97% water, 5-3% lubricant additive), then the problem of sealing the extremely sensitive bearings from the drive shaft, which arises, arises powerful pumps require very careful lubrication. The sealing of the shaft bearing on the opposite end of the drive shaft in the machine housing against water is very complex and leads to an increase in the overall length and volume of the pump, because the increase in the span results in a higher shaft deflection, which is consequently increased got to. For this reason, high-performance swashplate-type axial piston machines have not been used to pump water or other low-viscosity media.
Aus der US-A-3 690 789 ist eine Axialkolbenmaschine in Schrägscheibenbauart bekannt, bei welcher der trommelförmige Zylinderblock innerhalb eines Maschinengehäuses mit einer ausserhalb in einem Lagergehäuse auf zwei Wälzlagern abgestützten Antriebswelle verbunden ist. Der Zylinderblock ist an seiner Aussenmantelfläche auf einem Gleitlager an der Innenseite des Maschinengehäuses abgestützt. Das Fördermedium strömt frei in das Maschinengehäuse ein und tritt durch eigens dafür vorgesehene Kanäle in das Lagergehäuse über. Sowohl das Gleitlager des Zylinderblockes als auch die Wälzlager der Antriebswelle sind von dem Fördermedium umspült. Da eine Abdichtung der Lager gegenüber dem Fördermedium nicht vorgesehen ist, kommt diese Axialkolbenmaschine auch nicht für den Betrieb mit HFA-Flüssigkeiten oder Wasser in Betracht.From US-A-3 690 789 a swash plate type axial piston machine is known in which the drum-shaped cylinder block within a machine housing is connected to a drive shaft supported on the outside in a bearing housing on two roller bearings. The outer surface of the cylinder block is supported on a slide bearing on the inside of the machine housing. The pumped medium flows freely into the machine housing and passes into the bearing housing through specially provided channels. Both the plain bearing of the cylinder block and the roller bearings of the drive shaft are washed by the medium. Since the bearings are not sealed against the pumped medium, this axial piston machine is also not suitable for operation with HFA liquids or water.
Für den Betrieb von Axialkolbenpumpen mit HFA-Flüssigkeiten ist vorgeschlagen worden, die Wälzlager mit Dauerschmierung völlig abzukapseln und damit auch die durchgehende Welle sowie die dort befindliche Kupplung von der Hydraulik-Flüssigkeit zu trennen (o+p «ölhydraulik und pneumatik» 22 (1978) Nr. 1, Seiten 16 bis 18). Durch die Abkapslung der beiden Lager der durchgehenden Welle wird der Aufbau der Pumpe aber sehr aufwendig.For the operation of axial piston pumps with HFA fluids, it has been proposed to completely encapsulate the rolling bearings with permanent lubrication and thus also to separate the continuous shaft and the coupling located there from the hydraulic fluid (o + p «oil hydraulics and pneumatics» 22 (1978) No. 1,
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine im Aufbau einfache Axialkolbenmaschine in Schrägscheibenbauart zu schaffen, die zur Förderung von niederviskosen Medien geeignet ist.The present invention has for its object to provide a swash plate type axial piston machine which is simple in construction and is suitable for conveying low-viscosity media.
Diese Aufgabe wird mit den im Kennzeichen des Hauptanspruches angegebenen Mitteln gelöst. Die vorteilhafte Ausgestaltung der Erfindung ist Gegenstand der Unteransprüche.This object is achieved with the means specified in the characterizing part of the main claim. The advantageous embodiment of the invention is the subject of the dependent claims.
Die erfindungsgemässe Axialkolbenmaschine besitzt ein Lagergehäuse für die Lager der Antriebswelle und ein Maschinengehäuse zur Aufnahme des Pumpenkörpers. Das Fördermedium und die Wellenlager sind in voneinander getrennten Räumen untergebracht und unabhängig voneinander auf geeignete Weise abgedichtet. So erfolgt die Abdichtung des zur Schmierung der Lager mit einem geeigneten Schmiermittel wie Fett gefüllten Lagergehäusen mit Radialwellendichtungen, während zur Abdichtung des mit Leckflüssigkeit gefüllten Maschinengehäuses gegenüber der Antriebswelle eine Gleitringdichtung mit einem stehenden und einem drehenden Ring vorgesehen ist, die abdichtend aufeinander gleiten.The axial piston machine according to the invention has a bearing housing for the bearings of the drive shaft and a machine housing for receiving the pump body. The pumped medium and the shaft bearings are housed in separate rooms and sealed independently of one another in a suitable manner. For example, the bearing housing filled with a suitable lubricant, such as grease, is sealed with radial shaft seals, while the machine housing filled with leakage fluid is sealed off from the drive shaft by a mechanical seal with a standing and a rotating ring, which slide against one another in a sealing manner.
Bei der erfindungsgemässen Axialkolbenmaschine sind die im Betrieb wirksamen Kräfte in vorteilhafter Weise aufgeteilt, weil alle axialen Kräfte auf das Maschinengehäuse übertragen werden, so dass die Wälzlager im Lagergehäuse nur durch radiale Kräfte belastet sind. Die kompakte, raumsparende Bauart erlaubt eine einfache, problemlose Montage und Demontage, weil nach dem Lösen der die Gehäuse miteinander verbindenden Befestigungsschrauben der im Maschinengehäuse untergebrachte Pumpenkörper einfach von der Antriebswelle abgezogen werden kann.In the axial piston machine according to the invention, the forces which are effective during operation are advantageously divided because all the axial forces are transmitted to the machine housing, so that the roller bearings in the bearing housing are only loaded by radial forces. The compact, space-saving design allows simple, problem-free assembly and disassembly, because after loosening the fastening screws connecting the housing, the pump body housed in the machine housing can be easily removed from the drive shaft.
Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnung erläutert, die eine erfindungsgemässe Axialkolbenmaschine in Schrägscheibenbauart im Längsschnitt zeigt.An exemplary embodiment of the invention is explained below with reference to the drawing, which shows a swash plate type axial piston machine according to the invention in longitudinal section.
Die mit 1 bezeichnete Antriebswelle der Axialkolbenmaschine ist ausserhalb des Maschinengehäuses 2 in einem eigenen Lagergehäuse 3 gelagert und in ihrem mittleren Längenbereich auf zwei Wälzlagern 4 und 5 abgestützt. Das Lagergehäuse 3 ist antriebsseitig mit einem Lagerdeckel 6 und an der zum Maschinengehäuse anliegenden Seite von einer flanschförmigen Büchse 7 verschlossen und durch darin eingesetzte Radialwellendichtungen 8 und 9 abgedichtet. Zur Schmierung der Wälzlager 4 und 5 ist das Lagergehäuse 3 mit einem geeigneten Schmiermittel angefüllt.The drive shaft of the axial piston machine, designated 1, is mounted outside of the
Mit der Antriebswelle 1 wird ein trommelförmiger Zylinderblock 10 im Pumpengehäuse 2 angetrieben. Dazu ist das in das Maschinengehäuse 2 hineinragende freie Ende der Antriebswelle 1 mit einer Kerbverzahnung 11 versehen, die in eine korrespondierende Verzahnung an der Innenwandung des Zylinderblockes 10 eingreift.A drum-
In dem Zylinderblock 10 ist eine bestimmte Anzahl von axialgerichteten Zylinderbohrungen 12 kreisförmig zur Drehachse in gleichem Winkelabstand voneinander angeordnet. In jeder Zylinderbohrung 12 befindet sich ein längsverschiebbarer Kolben 13, der mit einem Kolbenschuh 14 gleitend auf einer geneigt angeordneten, feststehenden Schrägscheibe 15 abgestützt ist. Diese ist unabhängig von der mittig mit seitlichem Abstand hindurchgeführten Antriebswelle 1 auf rechtwinklig dazu angeordneten Zapfen 16 im Maschinengehäuse gelagert, wobei der Neigungswinkel der Schrägscheibe 15 verstellbar ist. Wenn der Zylinderblock 10 in Umdrehung versetzt wird, ruft die Schrägscheibe 15 aufgrund ihrer Neigung eine hin- und hergehende Bewegung der Kolben 13 in den entsprechenden Zylinderbohrungen 12 hervor. Der Zylinderblock 10 liegt stirnseitig gegen eine feststehende, kugelflächig ausgeformte Steuerplatte 17 an, in der sich zwei im Querschnitt nierenförmig ausgebildete Steueröffnungen befinden. Bei in Umdrehung versetztem Zylinderblock 10 werden die Hubräume der Zylinderräume 12 über die Steueröffnungen der Steuerplatte 17 wechselweise mit einem Saugkanal 18 und einem Druckkanal 19 in dem sich daran anschliessenden, das Maschinengehäuse 2 nach aussen abschliessenden Anschlussdeckel 20 verbunden.A certain number of axially directed
Zwischen den Zylinderbohrungen 12 und den Kolben 13 wird jeweils ein Leckspalt gebildet, durch den bei jedem Druckhub ein geringer Mengenanteil des Fördermediums aus dem Zylinderblock 10 in das Maschinengehäuse 2 eintritt. Diese Leckflüssigkeit wird über den Leckanschluss 21 zu dem nicht dargestellten Tank zurückgeführt. Das Maschinengehäuse 2 ist gegenüber dem Lagergehäuse 3 durch eine Gleitringdichtung 22, 23 abgedichtet, deren drehender Ring 22 auf der Antriebswelle 1 befestigt und deren stehender Ring 23 in die der Schrägscheibe 15 gegenüberliegende Büchse 7 eingesetzt ist. Der Raum zwischen der das Lagergehäuse 3 abdichtenden Radialwellendichtung 8 und dem stehenden Ring 23 der das Maschinengehäuse 2 abdichtenden Gleitringdichtung 22, 23 ist an einen nach aussen führenden Entlüftungskanal 24 angeschlossen. Das Maschinengehäuse 2 ist mit dem Lagergehäuse 3 im Bereich der Gleitringdichtung 22, 23 aussen verschraubt.A leakage gap is formed between the
Claims (7)
characterised by the following features:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT83108866T ATE30455T1 (en) | 1982-09-10 | 1983-09-08 | AXIAL PISTON MACHINE. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3233579A DE3233579C2 (en) | 1982-09-10 | 1982-09-10 | Axial piston machine |
DE3233579 | 1982-09-10 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0105222A2 EP0105222A2 (en) | 1984-04-11 |
EP0105222A3 EP0105222A3 (en) | 1985-05-15 |
EP0105222B1 true EP0105222B1 (en) | 1987-10-28 |
Family
ID=6172889
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP83108866A Expired EP0105222B1 (en) | 1982-09-10 | 1983-09-08 | Axial piston machine |
Country Status (4)
Country | Link |
---|---|
US (1) | US4520712A (en) |
EP (1) | EP0105222B1 (en) |
AT (1) | ATE30455T1 (en) |
DE (1) | DE3233579C2 (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3519783A1 (en) * | 1985-06-03 | 1986-12-04 | Danfoss A/S, Nordborg | AXIAL PISTON MACHINE |
US4771676A (en) * | 1986-05-19 | 1988-09-20 | Toshiba Kikai Kabushiki Kaisha | Hydraulic transmission device |
DE3743125A1 (en) * | 1987-12-18 | 1989-07-06 | Brueninghaus Hydraulik Gmbh | AXIAL PISTON PUMP |
US5105723A (en) * | 1990-04-06 | 1992-04-21 | Zexel Corporation | Swash plate type axial piston pump |
US5135362A (en) * | 1990-04-17 | 1992-08-04 | Martin Francis J | Hydraulic axial piston pump |
US5440878A (en) * | 1992-08-27 | 1995-08-15 | Vernon E. Gleasman | Variable hydraulic machine |
JP3232544B2 (en) * | 1993-11-24 | 2001-11-26 | 株式会社豊田自動織機 | Weir structure of vehicle air conditioning compressor |
US5538401A (en) * | 1994-07-05 | 1996-07-23 | Denison Hydraulics Inc. | Axial piston pump |
FR2721352B1 (en) * | 1994-06-17 | 1996-09-06 | Leduc Rene Hydro Sa | High pressure pump to supply fuel injectors for internal combustion engines. |
DE102006058355A1 (en) * | 2006-03-10 | 2007-09-13 | Brueninghaus Hydromatik Gmbh | Combi pump housing for several nominal sizes |
DE102015006157B3 (en) * | 2015-05-11 | 2016-06-23 | Orpu Pumpenfabrik Gmbh | Compact bearing of a pump shaft in a lantern coupling |
CN114382609A (en) * | 2021-12-13 | 2022-04-22 | 天津大学 | Reciprocating high-low pressure self-adaptive compensation sealing device |
DE202023103491U1 (en) | 2023-06-23 | 2023-08-17 | Orpu Pumpenfabrik Gmbh | Arrangement of a mechanical seal on a motor/pump shaft |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2113167A (en) * | 1935-09-09 | 1938-04-05 | B B B Corp | Water pump seal |
US2157692A (en) * | 1936-04-29 | 1939-05-09 | Waterbury Tool Co | Power transmission |
GB604117A (en) * | 1944-08-15 | 1948-06-29 | Vickers Armstrongs Ltd | Improvements in radial pumps or hydraulic motors |
US2495685A (en) * | 1945-06-08 | 1950-01-31 | Beaman Bernard | Two-stage hydraulic pressure pump |
US2911241A (en) * | 1955-12-13 | 1959-11-03 | Reliance Electric & Eng Co | Oil seal assembly |
US3185488A (en) * | 1961-11-06 | 1965-05-25 | Federal Mogul Bower Bearings | Face seal |
DE1261760B (en) * | 1964-01-14 | 1968-02-22 | Oswald Thoma | In the drive flange of an inclined drum axial piston machine (pump or motor) longitudinally movable piston sliding shoe |
CH424486A (en) * | 1964-09-16 | 1966-11-15 | Mobax Limited | Hydraulic axial piston machine |
US3457873A (en) * | 1967-03-20 | 1969-07-29 | Sperry Rand Corp | Pumping chamber decompression |
GB1235696A (en) * | 1968-05-24 | 1971-06-16 | Laser Eng Dev Ltd | Reciprocating hydraulic pumps and motors of the axial type |
US3643550A (en) * | 1970-02-16 | 1972-02-22 | Sperry Rand Corp | Power transmission |
DE2114923A1 (en) * | 1970-03-31 | 1971-10-14 | Delavan Manufactur"^ Co , west Des Moines, Ia (V St A ) | Pressure generating device with axial piston |
US3690789A (en) * | 1970-05-01 | 1972-09-12 | Dowty Technical Dev Ltd | Hydraulic apparatus |
FR2110573A5 (en) * | 1970-10-22 | 1972-06-02 | Citroen Sa | |
US3693508A (en) * | 1970-12-28 | 1972-09-26 | Sperry Rand Corp | Power transmission |
DE7220129U (en) * | 1971-05-29 | 1977-08-04 | Officine Galileo S.P.A., Florenz (Italien) | HYDRAULIC PUMP WITH CHANGEABLE CAPACITY |
DE2740821C3 (en) * | 1977-09-10 | 1980-02-21 | Hermann Hemscheidt Maschinenfabrik Gmbh & Co, 5600 Wuppertal | Bearing of the drive shaft of a bent axis axial piston machine |
DE2947553C2 (en) * | 1979-11-26 | 1982-03-25 | Hydromatik Gmbh, 7900 Ulm | Bearing of the drive shaft of an axial piston machine in bent axis design |
JPS57163174A (en) * | 1981-03-31 | 1982-10-07 | Hitachi Ltd | Axial piston machine |
-
1982
- 1982-09-10 DE DE3233579A patent/DE3233579C2/en not_active Expired
-
1983
- 1983-09-08 AT AT83108866T patent/ATE30455T1/en not_active IP Right Cessation
- 1983-09-08 EP EP83108866A patent/EP0105222B1/en not_active Expired
- 1983-11-01 US US06/547,566 patent/US4520712A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0105222A3 (en) | 1985-05-15 |
US4520712A (en) | 1985-06-04 |
DE3233579C2 (en) | 1984-09-13 |
EP0105222A2 (en) | 1984-04-11 |
DE3233579A1 (en) | 1984-03-15 |
ATE30455T1 (en) | 1987-11-15 |
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