EP0014695B1 - Schrämkopf mit Wasserdüsen und Verfahren zum Betreiben dieses Schrämkopfes - Google Patents

Schrämkopf mit Wasserdüsen und Verfahren zum Betreiben dieses Schrämkopfes Download PDF

Info

Publication number
EP0014695B1
EP0014695B1 EP80890010A EP80890010A EP0014695B1 EP 0014695 B1 EP0014695 B1 EP 0014695B1 EP 80890010 A EP80890010 A EP 80890010A EP 80890010 A EP80890010 A EP 80890010A EP 0014695 B1 EP0014695 B1 EP 0014695B1
Authority
EP
European Patent Office
Prior art keywords
cutting head
annular gap
cutting
cooling water
nozzles
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
Application number
EP80890010A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0014695A1 (de
Inventor
Rudolf Hintermann
Alfred Zitz
Otto Dipl.-Ing. Schetina
Herwig Wrulich
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.)
Voestalpine AG
Original Assignee
Voestalpine AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=3504589&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0014695(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Voestalpine AG filed Critical Voestalpine AG
Publication of EP0014695A1 publication Critical patent/EP0014695A1/de
Application granted granted Critical
Publication of EP0014695B1 publication Critical patent/EP0014695B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/10—Making by using boring or cutting machines
    • E21D9/1006—Making by using boring or cutting machines with rotary cutting tools
    • E21D9/1013—Making by using boring or cutting machines with rotary cutting tools on a tool-carrier supported by a movable boom
    • E21D9/102—Making by using boring or cutting machines with rotary cutting tools on a tool-carrier supported by a movable boom by a longitudinally extending boom being pivotable about a vertical and a transverse axis
    • E21D9/1026—Making by using boring or cutting machines with rotary cutting tools on a tool-carrier supported by a movable boom by a longitudinally extending boom being pivotable about a vertical and a transverse axis the tool-carrier being rotated about a transverse axis
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/22—Equipment for preventing the formation of, or for removal of, dust
    • E21C35/23—Distribution of spraying-fluids in rotating cutter-heads

Definitions

  • the cutter head rotates and the water must flow to the cutter head over the carrier of the cutter head, i. H. usually via the cutting arm.
  • a cutter head is equipped with a large number of chisels and therefore a large number of nozzles must be provided on the cutter head, which must be connected to a space from which the water is supplied to the nozzles. This also presents difficulties.
  • a cutting roller for roller cutting machines has already become known, the jacket of which carries water nozzles.
  • a cutting machine has become known in which two cutting heads are mounted on a cross member on both sides of a cutting arm.
  • the cutter arm can be swiveled horizontally and vertically.
  • the cutting heads are hollow and the support, which is rigidly connected to the cutting arm, projects into the cavity of the cutting heads. With such designs, it is also known to accommodate the last gear stage of the cutter head drive in the hollow cutter head, and this last gear stage must be included in the oil circuit.
  • the invention now relates to a hollow cutting head of a part-cut cutting machine equipped with chisels, which can be rotatably supported on an end of the cross member projecting into the hollow cutting head, the cross member being rigidly connected to the cutting arm pivotable in a horizontal and vertical plane, and the cutting head cooling water nozzles has, which are directed against the chisel, the cooling water in the cutting head body and via channels in the same can be guided to the cooling water nozzles, and aims to effectively seal the water-carrying system even at high water supply pressures, such as. B. over 300 bar and in particular over 400 bar, and to allow easy guidance of the water to the nozzles.
  • the invention consists essentially in the fact that a distribution chamber is arranged in the cutting head body, which is aligned with a water supply pipe rigidly arranged on the cross member on its axis, the water supply pipe opening into the distribution room and sealingly connectable to the distribution room of the rotatably mounted cutting head body, that in Cutting head body is provided at least one annular gap which extends in the axial direction of the cutting head, that the annular gap (s) is connected to the distribution space via at least one bore and that bores open into the annular gap which lead to the cooling water nozzles.
  • the nozzles can now pass through approximately radial bores, all of which are in the annular gap or in the Annular gaps open, are connected to the water-bearing space. This results in a simple construction. Essentially, only short bores are required and intersections of bores, which are necessary when drilling around the corner, are avoided. A pressure drop in the bores is thus reduced to a minimum, while in the annular gap or in the annular gaps the flow velocity is relatively low, so that the pressure drop is negligible here.
  • the supply pressure of the water can thus be brought substantially into effect on the nozzles and thus counteracting blockage of the nozzles.
  • the walls of the annular gap or the annular gap have an approximately cylindrical shape in a cutting head. Such a cylinder jacket can withstand very high pressures without difficulty.
  • the load on the end walls delimiting the annular gap is unfavorable. This applies in particular to a known embodiment in which the cutting head guide is constructed from axially adjoining disks which are welded to one another. In this case, the weld seams are stressed by the load acting on the end walls of the annular gap.
  • the areas of the end walls of an annular gap acted upon by the water pressure are, however, substantially smaller than the area of the cylindrical walls delimiting the annular gap, so that the total pressure acting on these end walls can still be readily absorbed even with high supply pressure of the water.
  • the size of an end face delimiting the annular gap is only a fraction, preferably at most 1/10 to 1 / 20 the size of the circumferential surface of the annular gap, the annular gap extending over at least one third of the axial length of the cutting head. In this way, a simple construction with high compressive strength is achieved.
  • the inventive design of the cutting head enables the cooling water to be fed to the cutting head under very high pressure and to make this high pressure effective without significant losses to the nozzles, so that blockage of the nozzles is avoided with certainty.
  • the cooling water is fed to the cutting head under a pressure of over 300 bar, preferably under a pressure of about 400 bar. In the known designs, it was not possible to increase the supply pressure of the cooling water to the cutting head above 20 to 30 bar.
  • the water supply pipe can be sealingly guided through a wall rotating with the cutting head, which delimits a space separated from the oil space of the cutting head drive and from the roller bearings that support the cutting head. This ensures that in the event of slight leaks in the sealing point between the fixed part and the rotating cutting head, water escaping does not get directly into the oil circuit.
  • this space, which is separated from the oil space is preferably in communication with the atmosphere, so that no pressure can be built up in this space, which is separated from the oil space, even in the event of major leaks due to escaping water.
  • the seal arranged in the wall rotating with the cutting head is now not acted upon by the supply pressure and therefore ensures complete tightness.
  • the space separated from the oil space can communicate with the atmosphere via a check valve opening to the atmosphere and / or a labyrinth seal or the like, so that dust and foreign bodies cannot penetrate into the space separated from the oil space.
  • FIG. 1 shows a cutting machine
  • FIGS. 2 and 3 show the cutting arm with the cutting heads in side view and top view
  • FIG. 4 shows a section through one of the cutting heads and the cutting arm according to line IV-IV of FIG. 2 on a larger scale.
  • the cutting machine 1 has a cutting arm 2 which can be pivoted from top to bottom about a horizontal axis 3 and laterally about a vertical axis 4.
  • a cutting head 6 is rotatably mounted about an axis 5.
  • a cooling water line 7 is guided along the top of the cutting arm 2, which is covered by a U-profile 8 and is protected against falling rock.
  • This cooling water line is guided over the end of the cutting arm 2 to the front and is connected to the cutting arm by a screw connection 9.
  • 10 is a cover plate which protects the front part of the cooling water line 7.
  • the cooling water line 7 is supplied with cooling water under high pressure via a pump, not shown.
  • the cutting head body 12 is constructed from axially lined-up disks 13, 14, 15, 16 and 17, which are welded together. These disks 13 to 17 surround a cylindrical middle piece 18 of the cutter body and this middle piece 18 is welded to the welded group of disks 13 to 17.
  • This welded unit 13 to 17 and 18 is covered by an end part 19 which is screwed by means of screws 20 to the welded unit 13 to 17 and 18.
  • a ring 21 and a plate 22 are welded to this end part 19 again.
  • a central ring part 23, with which a central insert 24 is screwed, is welded into the plate 22.
  • the cooling water is guided from the screw connection 9 via a bore 25 on the cutting arm 2 and bores 26 and 27 in the support 11 rigidly connected to the cutting arm to a central cavity 28 in this support 11.
  • This tube 29 opens into a distribution space 30, which lies within the insert 24.
  • the end of this tube 29 is sealingly guided in the insert 24 by a seal 31.
  • the insert 24 thus rotates with the cutting head around the fixed tube 29.
  • this tube is arranged in the axis of the cutting head 6, a perfect seal by the seal 31 is possible.
  • the cutter head body is mounted on the carrier 11 rigidly connected to the cutter arm 2 by means of roller bearings 32, 33 and 34.
  • the outer bearing seat 35 of the roller bearing 34 is rigidly connected to the cutting head body, for example screwed, and closed by a cover 36.
  • a cavity 37 is formed between the cover 36 and the plate 22.
  • a non-illustrated epicyclic gear, which forms the last transmission stage, is also arranged within the carrier 11. This epicyclic gear and also the roller bearings 32, 33 and 34 run in an oil bath which is connected to the oil circuit of the gear.
  • the space 37 is sealed off from the oil space by the cover 36. 38 indicates an overload slip clutch, via which the cutting head body consisting of parts 13 to 22 is connected to a hub 39, which is mounted on the carrier 11 by means of the roller bearings 32, 33 and 34.
  • the central tube 29 rigidly connected to the carrier is also sealingly guided in the cover 36 by a seal 40. It is thereby achieved that, if necessary, water passing through the seal 31 cannot get into the oil circuit, but only into the space 37, so that entry of water into the oil circuit is avoided.
  • This space 37 is connected to the atmosphere through an opening 41, so that a pressure cannot build up in the space 37.
  • a check valve (not shown) and / or a labyrinth seal (not shown) can be installed in this opening 41, so that penetration of dirt into the space 37 is avoided.
  • the cooling water passes through a bore 42 into an annular gap 43 and through further bores 44 and 45 into an annular gap 46.
  • These two annular gaps 43 and 46 extend essentially over the axial length of the cutting head body.
  • the cooling water nozzles are located on the circumference of the cutting head body and each radial bore starting from the circumference must therefore meet in one of the annular gaps 43 or 46.
  • Such radial bores 47 and 48 are shown in the drawing.
  • the holes leading to the other nozzles are not in the cutting plane. A water supply to all nozzles is thus possible from these annular gaps 43 and 46.
  • the annular gap 46 lies between the middle piece 18 and the group of disks 13 to 17 welded together.
  • the annular gap 43 lies between the end part 19 and the ring 21.
  • annular gaps can therefore easily be left out before the parts are welded together. Since the supply pressure is chosen to be very high and is, for example, 400 bar, the load on the walls delimiting the cylindrical annular gaps 43 and 46 is considerable. The cylindrical walls of the annular gaps 43 and 46 have a large area. However, these surface loads can easily be absorbed by the disks 13 to 17 delimiting the annular gap 46 and the central piece 18. The loads acting on the ends 49 and 50 of the annular gap 46, however, stress the welded connections between the disks 13 to 17. However, because the gap width of the annular gap is kept very small, these loads are only slight even at very high supply pressure of the cooling water and therefore harmless.
  • Fig. 1 the drive of the cutting head is also shown schematically.
  • Hiebei is designated by 51 the toothed output shaft end, the teeth of which meshes with intermediate wheels 53 mounted on axles 52 in the carrier 11. These intermediate wheels are again in engagement with an internal toothing 54 of a part of the rotatably mounted cutting head 6 which is designed as a ring gear.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Nozzles (AREA)
  • Drilling And Boring (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
EP80890010A 1979-02-09 1980-01-18 Schrämkopf mit Wasserdüsen und Verfahren zum Betreiben dieses Schrämkopfes Expired EP0014695B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT998/79 1979-02-09
AT99879A AT359453B (de) 1979-02-09 1979-02-09 Schraemkopf

Publications (2)

Publication Number Publication Date
EP0014695A1 EP0014695A1 (de) 1980-08-20
EP0014695B1 true EP0014695B1 (de) 1983-05-11

Family

ID=3504589

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80890010A Expired EP0014695B1 (de) 1979-02-09 1980-01-18 Schrämkopf mit Wasserdüsen und Verfahren zum Betreiben dieses Schrämkopfes

Country Status (19)

Country Link
US (1) US4289357A (hu)
EP (1) EP0014695B1 (hu)
JP (1) JPS6027359B2 (hu)
AR (1) AR223696A1 (hu)
AT (1) AT359453B (hu)
AU (1) AU535581B2 (hu)
BG (1) BG39298A3 (hu)
BR (1) BR8000808A (hu)
CA (1) CA1124754A (hu)
CS (1) CS256351B2 (hu)
DD (1) DD149101A5 (hu)
DE (1) DE3062997D1 (hu)
HU (1) HU182088B (hu)
IN (1) IN153640B (hu)
PL (1) PL122621B1 (hu)
RO (1) RO86913B1 (hu)
SU (1) SU1187728A3 (hu)
YU (1) YU33180A (hu)
ZA (1) ZA8036B (hu)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3049146C2 (de) * 1980-12-24 1984-05-10 Friedrich Wilhelm 4230 Wesel Paurat Schrämwalze mit Sprühdüsen, welche in Bedüsungssektoren aufgeteilt ist
AT375151B (de) * 1982-09-03 1984-07-10 Voest Alpine Ag Schraemkopf fuer streckenvortriebsmaschinen sowie verfahren zu seiner herstellung
AT375152B (de) * 1982-09-03 1984-07-10 Voest Alpine Ag Schraemkopf fuer streckenvortriebsmaschinen
US4555143A (en) * 1983-04-11 1985-11-26 Voest-Alpine Aktiengesellschaft Apparatus for cutting rock
AT378036B (de) * 1983-04-11 1985-06-10 Voest Alpine Ag Verfahren zum bespruehen der meissel und/oder der ortsbrust mit druckfluessigkeit sowie vorrichtung zur durchfuehrung dieses verfahrens
DE3414195A1 (de) * 1984-04-14 1985-10-24 Charbonnages De France, Paris Drehkoerper eines schneidkopfes einer teilschnittvortriebsmaschine
AT381561B (de) * 1985-01-21 1986-11-10 Voest Alpine Ag Einrichtung zur zufuehrung von wasser zu den schraemkoepfen einer schraemmaschine
JPS61143060U (hu) * 1985-02-26 1986-09-04
AT382206B (de) * 1985-04-18 1987-01-26 Voest Alpine Ag Vorrichtung zum intermittierenden beaufschlagen von axial verschiebbaren meisseln eines schraemkopfes mit druckmittel
DE3536171A1 (de) * 1985-10-10 1987-04-16 Gewerk Eisenhuette Westfalia Querschneidkopf einer teilschnittmaschine mit innenbeduesung
DE3800426A1 (de) * 1988-01-09 1989-07-20 Freier Fritz Fa Schraemkopf fuer den gesteins- oder kohleabbau
AT393296B (de) * 1989-05-16 1991-09-25 Voest Alpine Maschinenbau Einrichtung zur zufuehrung von fluid fuer die beduesung von meisseln in einer schraemwalze
GB9804631D0 (en) * 1998-03-06 1998-04-29 Minnovation Ltd Water seal arrangement
JP2011084993A (ja) * 2009-10-19 2011-04-28 Mitsui Miike Mach Co Ltd ロードヘッダの切削ブーム
EP2811113A1 (en) * 2013-06-06 2014-12-10 Caterpillar Global Mining Europe GmbH Modular cutting head
US8967730B2 (en) 2013-07-01 2015-03-03 Caterpillar Global Mining America Llc Wethead seal design for continuous mining machine
CN105178956A (zh) * 2015-09-15 2015-12-23 淮北市众泰机电工程有限公司 一种带有除尘结构的采煤机机头装置
WO2017204665A1 (en) * 2016-05-23 2017-11-30 Bumech S.A. Roadheader ripping head with a cooling duct
CN109322664B (zh) * 2018-12-06 2020-03-31 河南工程学院 一种用于煤炭开采中的自动采掘装置
CN110080786A (zh) * 2019-04-04 2019-08-02 中船重型装备有限公司 一种具有端面冻结系统的盾构机及其保护方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB996962A (en) * 1960-09-20 1965-06-30 Coal Industry Patents Ltd Rotary cutter unit for a mineral-mining machine
NL280067A (hu) * 1961-06-23
FR1301182A (fr) * 1961-09-20 1962-08-10 Coal Industry Patents Ltd Couteaux de haveuse à arrosage d'eau
GB1110763A (en) * 1963-10-29 1968-04-24 Coal Industry Patents Ltd Dust suppression means for use with mining machines
DE1242539B (de) * 1964-12-05 1967-06-22 Eickhoff Geb Vorrichtung zur Fluessigkeitszufuhr zu ueber den Umfang eines rotierenden Abbauwerkzeuges, insbesondere einer Schraemwalze, verteilten Spruehduesen
US3374033A (en) * 1966-02-21 1968-03-19 Lee Norse Co Cutter head having fluid supply means
GB1309005A (en) * 1970-07-24 1973-03-07 Coal Industry Patents Ltd Rotary cutters for mineral mining machines
US3876254A (en) * 1973-11-05 1975-04-08 Dresser Ind Mining machine with apparatus for supplying dust suppression liquid to rotating cutting head
GB1452862A (en) * 1974-01-18 1976-10-20 Coal Industry Patents Ltd Apparatus for ventilating cutter heads of mineral mining machines

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Taschenbuch für den Tunnelbau 1979 Verlag Glückauf GmbH /Essen S.317 *

Also Published As

Publication number Publication date
ATA99879A (de) 1980-04-15
PL221913A1 (hu) 1980-11-03
YU33180A (en) 1983-04-30
JPS6027359B2 (ja) 1985-06-28
ZA8036B (en) 1980-12-31
JPS55111598A (en) 1980-08-28
EP0014695A1 (de) 1980-08-20
CS256351B2 (en) 1988-04-15
AR223696A1 (es) 1981-09-15
AT359453B (de) 1980-11-10
DE3062997D1 (en) 1983-06-16
IN153640B (hu) 1984-08-04
PL122621B1 (en) 1982-08-31
DD149101A5 (de) 1981-06-24
CA1124754A (en) 1982-06-01
BR8000808A (pt) 1980-10-14
AU535581B2 (en) 1984-03-29
HU182088B (en) 1983-12-28
SU1187728A3 (ru) 1985-10-23
AU5535380A (en) 1980-08-14
BG39298A3 (en) 1986-05-15
RO86913A2 (ro) 1985-06-29
RO86913B1 (ro) 1985-06-30
US4289357A (en) 1981-09-15

Similar Documents

Publication Publication Date Title
EP0014695B1 (de) Schrämkopf mit Wasserdüsen und Verfahren zum Betreiben dieses Schrämkopfes
DE2854307C2 (hu)
DE2134893A1 (de) Umlaufender Schrämer für bergmännische Hereingewinnungsmaschinen
EP0161465B1 (de) Drehkörper eines Schneidkopfes einer Teilschnittvortriebsmaschine
DE2830191A1 (de) Vorrichtung zur abdichtung des spaltes zwischen relativ zueinander verdrehbaren teilen
DE3919208C1 (hu)
EP1666671B1 (de) Schlitzwandfräse
DE2137385A1 (de) Gesteinsbohrer
DE19609899A1 (de) Vorrichtung zur Herstellung eines Erdlochs
AT393293B (de) Verfahren zum drehbohren und drehbohrvorrichtung
DE69432786T2 (de) Verbesserter rotierender räumer mit rollen
DE3122323C2 (hu)
DE3144741A1 (de) Steuerung des druckwassers innenbeduester schneidwalzen
DE2836627B1 (de) Schneidvorrichtung fuer Maschinen zum Vortrieb von Strecken,Tunnels u.dgl.
DE2717353C3 (de) Hydraulisch betätigte Schaltvorrichtung
DE102019134040A1 (de) Reinigungsvorrichtung
DE10123268A1 (de) Schnellspann-Einrichtung mit vereinfachtem Aufbau
DE3017660C2 (hu)
DE102015008793B4 (de) Wirbeldiffusor für Verbünde aus sich drehenden und stationären Komponenten
DE2435581C3 (de) Hydraulische Schlagvorrichtung zum Gesteinsbohren
DE19729540C1 (de) Schildvortriebsmaschine
DE3536171A1 (de) Querschneidkopf einer teilschnittmaschine mit innenbeduesung
DE2004773A1 (de) Hydromotor mit radialen Kolben
DE3803954A1 (de) Beduesungseinrichtung fuer den querschneidekopf einer teilschnittmaschine u. dgl.
DE2435581B2 (de) Hydraulische schlagvorrichtung zum gesteinsbohren

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): BE DE FR GB SE

17P Request for examination filed

Effective date: 19810212

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): BE DE FR GB SE

REF Corresponds to:

Ref document number: 3062997

Country of ref document: DE

Date of ref document: 19830616

ET Fr: translation filed
PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19840331

Year of fee payment: 5

Ref country code: SE

Payment date: 19840331

Year of fee payment: 5

26 Opposition filed

Opponent name: GEBR. EICKHOFF MASCHINENFABRIK U. EISENGIESSEREI M

Effective date: 19840125

PLBN Opposition rejected

Free format text: ORIGINAL CODE: 0009273

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

Free format text: STATUS: OPPOSITION REJECTED

27O Opposition rejected

Effective date: 19850621

BERE Be: lapsed

Owner name: VOEST-ALPINE A.G.

Effective date: 19880131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19890119

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19890131

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19891218

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19900131

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19910118

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19910930

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 80890010.4

Effective date: 19891205

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19981217

Year of fee payment: 20