EP0046854A1 - Dispositif contrôlant le godet d'une pelle mécanique notamment du type à godet à guidage parallèle pour maintenir un angle de raclage prédéterminé - Google Patents

Dispositif contrôlant le godet d'une pelle mécanique notamment du type à godet à guidage parallèle pour maintenir un angle de raclage prédéterminé Download PDF

Info

Publication number
EP0046854A1
EP0046854A1 EP81105409A EP81105409A EP0046854A1 EP 0046854 A1 EP0046854 A1 EP 0046854A1 EP 81105409 A EP81105409 A EP 81105409A EP 81105409 A EP81105409 A EP 81105409A EP 0046854 A1 EP0046854 A1 EP 0046854A1
Authority
EP
European Patent Office
Prior art keywords
excavator
bucket
digging
laser beam
operator
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.)
Ceased
Application number
EP81105409A
Other languages
German (de)
English (en)
Inventor
Waldemar Warnecke
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.)
Friedrich Wilhelm Schwing GmbH
Original Assignee
Friedrich Wilhelm Schwing 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 Friedrich Wilhelm Schwing GmbH filed Critical Friedrich Wilhelm Schwing GmbH
Publication of EP0046854A1 publication Critical patent/EP0046854A1/fr
Ceased legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
    • E02F3/435—Control of dipper or bucket position; Control of sequence of drive operations for dipper-arms, backhoes or the like
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
    • E02F3/435—Control of dipper or bucket position; Control of sequence of drive operations for dipper-arms, backhoes or the like
    • E02F3/437—Control of dipper or bucket position; Control of sequence of drive operations for dipper-arms, backhoes or the like providing automatic sequences of movements, e.g. linear excavation, keeping dipper angle constant
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/26—Indicating devices

Definitions

  • the invention relates to a backhoe with an arrangement for checking the position of its digging device according to the preamble of claim 1.
  • the invention is particularly applicable to backhoe excavators which carry a backhoe on their digging device, the cutting edge of which is at least part of the cross-section Line of a trench corresponds, so that, for example, semicircular digging or trench soles can be produced in one or more operations with such a spoon.
  • Such excavators are preferably provided with a parallel guidance of their bucket, which, once the cutting angle has been set, guide the bucket approximately over the entire digging area during the digging movement without any special intervention by the excavator operator along an embankment or an inclined or flat trench bottom.
  • Such backhoes are already part of the state of the art (DBP 18 00 045). According to their basic idea, they are designed so that the hydraulic cylinder used to pivot the spoon engages the boom on the one hand near the pivot axis of the dipper arm and on the other hand on a triangular bellcrank mounted on the dipper arm near the pivot axis of the spoon and the bellcrank with the Bucket is connected via a short handlebar so that the dipper arm, the deflection lever and the hydraulic cylinder together with the front end of the boom form a large articulated quadrilateral, which is formed by a triangle-shaped deflection triangle with one of the deflection lever, the end of the dipper arm , the spoon and the short handlebar formed small articulated quadrilateral, and that for a given length of the boom and given length of the dipperstick, the dimensions of the articulated quadrilaterals and the deflection triangle are coordinated with one another and the large articulated quadrilateral when adjusting the cutting angle of the Spoon on
  • the invention is based on a previously known excavator of this type, which is additionally provided with a position display of its bucket.
  • a pointer is used, which is controlled by a link, which connects the swivel joint of the bucket and an axially parallel base swivel joint on the.
  • Figure 3 illustrates the swing top excavator; the positional representation about the skew of the excavator in the handlebar plane can be corrected on the pointer scale and by different distances of the excavator from the working plane by adjusting the height of the axially parallel swivel joint on the upper part of the excavator.
  • Such an arrangement has the following advantage: If, for example, the excavator stands on the top of a bank embankment and the embankment is to be reworked with a predefined angle of inclination, the excavator operator only needs to change the cutting angle on part of the embankment until the pointer shows the embankment angle specified for him is present. The excavator operator can then inspect the slope from the selected point of view without visually inspecting the excavator or bucket Open the excavator and if necessary correct the cutting angle according to the display. Such an arrangement also ensures that the abrasive sole is level or weak, but is not suitable for certain applications.
  • the object of the invention is to create a control of the digging device which is independent of the level of the excavator and which enables the excavator operator to guide the bucket with great accuracy along a predetermined direction.
  • the direction in which the spoon must be guided during the digging movement in order to obtain the desired inclination and direction of the bottom of the trench is determined by setting up the laser beam in the predetermined hour and side hour.
  • the one in front of the excavator In contrast, the beam emitted by the laser transmitter is not observed. Since the laser transmitter can be set up in the part of the trench that has already been processed, it does not need to be moved as often when it is set up in front of the excavator. In addition, its emissions are not disturbed by the excavator.
  • the invention has the advantage that it enables a sufficiently precise control of the bucket without the level of the excavator being included in the measurement. This only affects the position of the spoon edge to the outline of the trench or embankment, which the Bagg E! Guide easily but without auxiliary devices 1: ann. For this reason, the bucket can also be designed with corresponding control cylinders so that it can be pivoted about a longitudinal axis without impairing the accuracy of the digging sole. This is the basis for digging larger trench cross-sections in successive trenching operations with the required accuracy.
  • the target plate is arranged on the rear edge of the bucket associated with the arm of the excavator; then when the level of the excavator is changed and in particular when the bucket is adjusted about a longitudinal axis, the plane of the target plate is rotated accordingly using a device of the type described.
  • this does not affect compliance with the specified side and altitude hour, as long as the target plate is aligned so that its plane is essentially perpendicular to the digging movement or the spoon edge.
  • the target plate is on the excavator scraper, e.g. attached to the dipper arm, provided that the arrangement of the target plate on the bucket would cause it to move completely or partially out of the operator's field of vision during the digging movement.
  • the target plate has a sighting device made of concentric circles. It has been found that the excavator operator can hold the point of incidence of the laser beam very precisely in the center of the circles even at great distances with such a sighting device.
  • a backhoe 1 with a crawler chassis has one a slewing ring 3 on top of the undercarriage 2 and stands on a formation 4, which can be, for example, the sole of a preliminary digging. In the exemplary embodiment, however, the terrain surface has been assumed as a subgrade.
  • the bucket 5 of the excavator 1 is designed as a backhoe bucket and can be pivoted at the end of the dipper arm 6 with a transverse axis 7 with the aid of a hydraulic cylinder piston arrangement 8.
  • the piston rod 10 engages a triangular deflection lever 11, which in turn is articulated at 14 via a link 12 in the region of the rear edge 13 of the spoon facing the dipper stick 6.
  • the dipper arm 6 is articulated on the boom 15 with its pivot axis 16.
  • the dipper stick can be pivoted with the aid of a rear hydraulic push piston mechanism 17.
  • This drive has a piston rod 19 which is articulated on a joint 18 to the rear end of the arm 6.
  • the cylinder of the thrust piston gear 17 is fastened in a joint 20 of the arm 15.
  • the rear part 21 of the boom 15 is articulated on a joint 22 on the upper frame 2 of the excavator 1.
  • the boom 15 is actuated by a third hydraulic piston drive 23.
  • the bell crank 11 is connected to the bucket 5 via the short link 12 so that the arm 6, the bell crank 11 and the hydraulic cylinder 8 together with the front end of the boom 15 form a large quadrilateral joint.
  • This four-bar linkage is coupled via a turning triangle formed by the triangular bell crank 11 to a small quadrilateral bar formed by the bell crank 11, the end of the arm 6, the bucket 5 and the short link 12.
  • the dimensions of the four-bar linkage and the deflection lever are matched to one another, and the large four-bar linkage is adjusted when adjusting the cutting angle of the spoon 5 to the inclination of the bottom 25 of a trench 26 using the hydraulic cylinder 8 changed in such a way and thereby adapted to the incline of the base that the bucket 5 during the digging movements, taking into account the pivoting movements of the boom 15 corresponding to the incline of the base, is guided approximately in parallel over the entire pivoting range of the spoon 5 along the bottom of the trench 25.
  • the excavator also has a control arrangement, which in principle is formed by a laser transmitter 27 and a target plate 28, which images the end point of the laser beam reproduced at 29.
  • the laser transmitter is displaced on a stand 30 via a holder 31, which allows the laser transmitter 27 to be set up in the height and side hour of the trench 26, which is imaged with the laser beam 29.
  • the target plate is fastened on the inner edge 13 facing the excavation device of the excavator and is designed as a transparent disc. It is therefore in the field of vision of the excavator operator seated in the cabire 32, who consequently attaches the disc via the dash-dotted line 33
  • This beam 33 runs along the broken line when the digger is in its position, which is also shown in broken lines. It is also in all intermediate positions in the field of vision of the excavator operator, who can consequently control the digging movement in such a way that the light spot imaged by the laser beam on the front side 34 of the disk 28 can be observed through the disk.
  • the pane 28 is provided with a sighting device 35, which can be located on the side 36 of the pane facing the excavator operator. However, since the pane is transparent, the sighting device 35 can also be attached to the side 34 which images the laser beam 29. Otherwise, the sighting device consists of concentric circles, the light spot imaged by the laser beam being assumed at 37.
  • the disc is set up so that its plane is perpendicular to the direction of the digging, i.e. to the movement that the blade 5 executes relative to the described parts of the scraper.
  • the laser transmitter 27 is in front of the back 35 of the disc 28 and thus in front of the excavator.
  • the front side 36 of the disk 28 facing the excavator operator serves as a display device which enables the excavator operator to control the bucket 5 in such a way that the light spot 37 of the laser beam 29 remains in the center of the sighting device 35.
  • the bucket 5 can be pivoted about a geometric axis 40 which lies in one plane with the described direction of grazing.
  • two further thrust piston gears 41, 42 are provided, which are attached with their piston rods to the edge 13 of the bucket 5 facing the scraping device.
  • the cutting edge 44 of the bucket 5 extends in a semicircular shape, as a result of which, due to the precise parallel guidance of the bucket 5 and the control of the bucket 5 guaranteed by the described control arrangement, the trench bottom 25 curved in accordance with the grazing edge 44 can be produced in one or more digging movements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Operation Control Of Excavators (AREA)
  • Component Parts Of Construction Machinery (AREA)
EP81105409A 1980-08-30 1981-07-11 Dispositif contrôlant le godet d'une pelle mécanique notamment du type à godet à guidage parallèle pour maintenir un angle de raclage prédéterminé Ceased EP0046854A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3032821 1980-08-30
DE19803032821 DE3032821A1 (de) 1980-08-30 1980-08-30 Loeffelbagger, insbesondere mit einer parallelfuehrung des auf einen vorgegebenen schnittwinkel eingestellten loeffels sowie einer anordnung zur kontrolle der stellung der schuerfeinrichtung des baggers zur schuerfsohle

Publications (1)

Publication Number Publication Date
EP0046854A1 true EP0046854A1 (fr) 1982-03-10

Family

ID=6110818

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81105409A Ceased EP0046854A1 (fr) 1980-08-30 1981-07-11 Dispositif contrôlant le godet d'une pelle mécanique notamment du type à godet à guidage parallèle pour maintenir un angle de raclage prédéterminé

Country Status (4)

Country Link
US (1) US4393606A (fr)
EP (1) EP0046854A1 (fr)
JP (1) JPS5774436A (fr)
DE (1) DE3032821A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0158792A1 (fr) * 1984-03-30 1985-10-23 Friedrich Wilh. Schwing GmbH Pelle mécanique
FR2661983A1 (fr) * 1990-05-09 1991-11-15 Delotte Serge Dispositif de controle de terrassement par rayon laser de guidage avec cible sur l'equipement.
EP0490855A1 (fr) * 1990-12-14 1992-06-17 Servoindikator Hb Indicateur
US5371959A (en) * 1990-12-14 1994-12-13 Servoindikator Hb Pointing device carried by digging arm of excavator, for dynamically indicating location and direction of extension of underground cable

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4884939A (en) * 1987-12-28 1989-12-05 Laser Alignment, Inc. Self-contained laser-activated depth sensor for excavator
US4888890A (en) * 1988-11-14 1989-12-26 Spectra-Physics, Inc. Laser control of excavating machine digging depth
JPH05210698A (ja) * 1992-01-31 1993-08-20 Toshiba Corp 機械翻訳システム
JPH0577343U (ja) * 1992-03-27 1993-10-22 前田建設工業株式会社 掘削装置
DE4309233C1 (de) * 1993-03-23 1994-07-21 Leffer Stahl & App Verfahren und Vorrichtung zum exakten Einhalten der vertikalen Aushubrichtung einer Schlitzwand
US5713144A (en) * 1993-11-30 1998-02-03 Komatsu Ltd. Linear excavation control apparatus for a hydraulic power shovel
US5528498A (en) * 1994-06-20 1996-06-18 Caterpillar Inc. Laser referenced swing sensor
US5960378A (en) * 1995-08-14 1999-09-28 Hitachi Construction Machinery Co., Ltd. Excavation area setting system for area limiting excavation control in construction machines
US5682311A (en) * 1995-11-17 1997-10-28 Clark; George J. Apparatus and method for controlling a hydraulic excavator
US5649600A (en) * 1996-01-11 1997-07-22 Asahi Precision Co., Ltd. Sensor mount for an excavator
US5933346A (en) * 1996-06-05 1999-08-03 Topcon Laser Systems, Inc. Bucket depth and angle controller for excavator
US5848485A (en) * 1996-12-27 1998-12-15 Spectra Precision, Inc. System for determining the position of a tool mounted on pivotable arm using a light source and reflectors
US6263595B1 (en) 1999-04-26 2001-07-24 Apache Technologies, Inc. Laser receiver and angle sensor mounted on an excavator
US6691437B1 (en) * 2003-03-24 2004-02-17 Trimble Navigation Limited Laser reference system for excavating machine
US7012237B1 (en) 2003-10-29 2006-03-14 Apache Technologies, Inc. Modulated laser light detector
US7838808B1 (en) 2005-03-16 2010-11-23 Trimble Navigation Limited Laser light detector with reflection rejection algorithm
US7323673B1 (en) 2005-03-16 2008-01-29 Apache Technologies, Inc. Modulated laser light detector with discrete fourier transform algorithm
WO2007006116A1 (fr) * 2005-07-12 2007-01-18 0728862 B.C. Ltd. Godet excavateur de tranchées
CN101490505B (zh) * 2006-07-12 2012-06-06 天宝导航有限公司 使用gps接收器提供二维位置数据的有高度修正的手持式激光探测器
US7770296B2 (en) * 2007-12-06 2010-08-10 Brauch Richard L Optical system and method of centering a tree within a tree spade
US20100129152A1 (en) * 2008-11-25 2010-05-27 Trimble Navigation Limited Method of covering an area with a layer of compressible material
US8794867B2 (en) 2011-05-26 2014-08-05 Trimble Navigation Limited Asphalt milling machine control and method
US20130167410A1 (en) * 2011-12-31 2013-07-04 Brian Bernard Langdon Clam-link apparatus and methods
US10017914B1 (en) * 2016-12-20 2018-07-10 Caterpillar Trimble Control Technologies Llc Excavator four-bar linkage length and angle offset determination using a laser distance meter
DE112021000581T5 (de) * 2020-01-14 2022-12-08 Sumitomo Heavy Industries, Ltd. Bagger und Fernsteuerungs-Unterstützungsvorrichtung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1800045B (de) * Schwing, Friedrich, Dipl.-Ing., 4680 Wanne-Eickel Löffelbagger zum Bearbeiten von Böschungen
FR1513746A (fr) * 1966-02-21 1968-02-16 Rees Ltd William F Procédé et appareil pour diriger des opérations de terrassement
GB1112103A (en) * 1964-12-23 1968-05-01 David Harold Norris Improvements in or relating to bucket excavating machines
US3426146A (en) * 1965-10-22 1969-02-04 Seaman Nuclear Corp Grade and alignment apparatus utilizing closed circuit television
DE1912614A1 (de) * 1969-03-12 1970-10-01 Gustafsson Eric Reinhold Vorrichtung an Erdbaumaschinen
FR2323124A1 (fr) * 1975-09-05 1977-04-01 Bres Jacques Dispositif pour les guidages d'un engin par reperage optique
US4231700A (en) * 1979-04-09 1980-11-04 Spectra-Physics, Inc. Method and apparatus for laser beam control of backhoe digging depth

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3003651A (en) * 1957-04-08 1961-10-10 Wain Roy Corp Excavating apparatus
US3588255A (en) * 1968-03-12 1971-06-28 Technidyne Inc Optical alignment methods and means utilizing coordinated laser beams and laser beam coordinating means for same
CS163734B2 (fr) * 1968-04-18 1975-11-07
US3656640A (en) * 1968-04-18 1972-04-18 Friedrich Schwing Bucket mounting for trench hoe
JPS54150802A (en) * 1978-05-16 1979-11-27 Komatsu Mfg Co Ltd Blade automatic controller of bulldozer and its method
DE2851942C2 (de) * 1978-12-01 1983-08-18 Friedrich Wilh. Schwing Gmbh, 4690 Herne Bagger

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1800045B (de) * Schwing, Friedrich, Dipl.-Ing., 4680 Wanne-Eickel Löffelbagger zum Bearbeiten von Böschungen
GB1112103A (en) * 1964-12-23 1968-05-01 David Harold Norris Improvements in or relating to bucket excavating machines
US3426146A (en) * 1965-10-22 1969-02-04 Seaman Nuclear Corp Grade and alignment apparatus utilizing closed circuit television
FR1513746A (fr) * 1966-02-21 1968-02-16 Rees Ltd William F Procédé et appareil pour diriger des opérations de terrassement
DE1912614A1 (de) * 1969-03-12 1970-10-01 Gustafsson Eric Reinhold Vorrichtung an Erdbaumaschinen
FR2323124A1 (fr) * 1975-09-05 1977-04-01 Bres Jacques Dispositif pour les guidages d'un engin par reperage optique
US4231700A (en) * 1979-04-09 1980-11-04 Spectra-Physics, Inc. Method and apparatus for laser beam control of backhoe digging depth

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0158792A1 (fr) * 1984-03-30 1985-10-23 Friedrich Wilh. Schwing GmbH Pelle mécanique
FR2661983A1 (fr) * 1990-05-09 1991-11-15 Delotte Serge Dispositif de controle de terrassement par rayon laser de guidage avec cible sur l'equipement.
EP0490855A1 (fr) * 1990-12-14 1992-06-17 Servoindikator Hb Indicateur
US5371959A (en) * 1990-12-14 1994-12-13 Servoindikator Hb Pointing device carried by digging arm of excavator, for dynamically indicating location and direction of extension of underground cable

Also Published As

Publication number Publication date
JPS5774436A (en) 1982-05-10
US4393606A (en) 1983-07-19
DE3032821A1 (de) 1982-04-15

Similar Documents

Publication Publication Date Title
EP0046854A1 (fr) Dispositif contrôlant le godet d'une pelle mécanique notamment du type à godet à guidage parallèle pour maintenir un angle de raclage prédéterminé
DE69725780T2 (de) Verfahren zum Abgraben einer Fläche mit einem gewünschten Kontur
EP0011766B1 (fr) Excavatrice à indication de position de l'outil de travail
DE69716672T2 (de) Steuerverfaren für einen Bagger
DE112008003444B4 (de) System für Lader
DE2217849A1 (de) Baggertieflöffel
DE3140686A1 (de) "hydraulischer bagger"
DE2714453A1 (de) Hydraulische baggeranordnung fuer ausschachtungen seitlich des baggers
EP0758701A1 (fr) Agencement d'articulation pour un outil d'excavatrice
DE2620809A1 (de) Einrichtung zur positionsanzeige und zur automatischen positionsregulierung des grabgefaesses fuer hydraulisch betaetigte erdbewegungsmaschinen
DE3234019A1 (de) Hydraulikbaggerausruestung
DE3331516A1 (de) Ladebagger
DE102020110187A1 (de) Verbesserte Hydraulikvorrichtung
DE2600397A1 (de) Gestaenge- und antriebsanlage, insbesondere zum verschwenken eines teils, z.b. der schaufel eines loeffelbaggers
DE2152579C3 (de) Hydraulische Einrichtung zur Überwachung der Höhenlage des Grabwerkzeuges eines Baggers
DE102013103642B4 (de) Planiervorrichtung
DE3310352C2 (de) Vorrichtung zum Ausheben von Schächten, insbesondere von Gräbern
DE756480C (de) Loeffelbagger-, insbesondere Tiefloeffelbaggereinrichtung, an der der Loeffel durch ein Aufreissmittel ersetzt ist
DE2308085C3 (de) Löffelbagger
DE1800045A1 (de) Schuerfeinrichtung fuer einen Bagger
DE3233581A1 (de) Anstellwinkelsteuerung der grabschaufel einer hydraulikbagger-tiefloeffelausruestung
DE2439967C2 (de) Löffelbagger zum Bearbeiten von Böschungen
DE1634910C2 (de) Grabenbagger
DE560441C (de) Planiergeraet fuer Halden
DE2501779C3 (de) Hydraulikbagger

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT CH FR GB IT NL SE

17P Request for examination filed

Effective date: 19820219

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19831205

RIN1 Information on inventor provided before grant (corrected)

Inventor name: WARNECKE, WALDEMAR