EP0128343A1 - Turbine à carter double avec au moins une soupape pour l'alimentation horizontale de la vapeur - Google Patents

Turbine à carter double avec au moins une soupape pour l'alimentation horizontale de la vapeur Download PDF

Info

Publication number
EP0128343A1
EP0128343A1 EP84105095A EP84105095A EP0128343A1 EP 0128343 A1 EP0128343 A1 EP 0128343A1 EP 84105095 A EP84105095 A EP 84105095A EP 84105095 A EP84105095 A EP 84105095A EP 0128343 A1 EP0128343 A1 EP 0128343A1
Authority
EP
European Patent Office
Prior art keywords
valve
diffuser
housing
valve housing
turbine
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.)
Granted
Application number
EP84105095A
Other languages
German (de)
English (en)
Other versions
EP0128343B1 (fr
Inventor
Peter Heiniger
Jaroslav Masek
Herbert Senn
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.)
BBC Brown Boveri AG Switzerland
Original Assignee
BBC Brown Boveri AG Switzerland
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 BBC Brown Boveri AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Publication of EP0128343A1 publication Critical patent/EP0128343A1/fr
Application granted granted Critical
Publication of EP0128343B1 publication Critical patent/EP0128343B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/12—Final actuators arranged in stator parts
    • F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
    • F01D17/141—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path
    • F01D17/145—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path by means of valves, e.g. for steam turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
    • F01D25/26—Double casings; Measures against temperature strain in casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D9/00—Stators
    • F01D9/06—Fluid supply conduits to nozzles or the like

Definitions

  • the present invention relates to a valve for horizontal steam supply to two-casing turbines according to the preamble of patent claim 1.
  • the quick-closing and control valves used in steam turbines are arranged separately from the turbine housing outside of the turbine housing and connected to the turbine housing by pipe elbows which open vertically into the same, the pipe elbows being shaped in such a way that they allow elastic deformations to compensate for the thermal expansions, without being impermissible high thermal stresses occur.
  • the elbows extend from the turbine housing far upwards with a corresponding space requirement in the hall, so that such large vertical elbows cause large hall heights with corresponding additional costs compared to a lower power plant hall.
  • the elbows themselves are also expensive and make
  • control valves in a vertical position were flanged directly to the upper part of the turbine housing or welded to their housing block.
  • control valves but only for single-case turbines, are also flanged or welded directly to the upper part of the housing in a horizontal position. So far, however, this could only be practiced with single-case turbines, because only in the case of revisions can the valve or valves be lifted up alone or together with the case.
  • control valves were either attached directly to the outer casing in a vertical position and connected to the inner casing in a movably sealing manner or the valves were connected to the inner housing by means of a pipe which ended vertically in the same and which was flanged onto the outer housing. This arrangement therefore does not make it possible to lift off the upper part of the housing during revisions without also having to remove the supply lines and the associated fastening devices.
  • Fig. 1, 1 denotes a two-housing high-pressure part of a steam turbine system, each with a steam supply indicated by the arrows 2 and 3 in the outer housing upper part 4 and in the outer housing lower part 5.
  • Der Steam supplied by the boiler enters quick-closing valves 6 and 7 at 2 and 3 and arrives at control valves 8 and 9 when valves 6 and 7 are open, through which the steam flow to the turbine required can be adjusted and regulated.
  • the adjustment and control of the control valves is carried out by the St - ellven- tilen structurally associated actuators 10 and 11.
  • the quick-closing valves 6 and 7 are operated by control motors 12 and 13, whose object, among other things is to shut off the steam supply in case of disaster suddenly.
  • FIG. 2 shows a vertical cross section through the inlet spiral of a steam turbine 14, the sectional plane being placed perpendicularly through the axes of two control valves 15 and 16 screwed to the outer housing upper part 20, of which only a part of the valve housing 17 and the diffuser are on the left side 18 are shown, on the other hand, only a part of the diffuser 19 on the right side.
  • two of the control valves namely 15 and 16 are attached to the upper housing part 20 at the same height
  • one valve each is provided on the outer housing part 4 and on the outer housing part 5.
  • attachment points are provided on the outer housing lower part 21 for the attachment of two steam supply lines, not shown, which connect two control valves to the connecting pieces 22 on the inner housing lower part 23.
  • FIG. 3 shows a cross section through a two-casing steam turbine with a double inlet and one each horizontally Control valve attached to the upper part of the outer housing and lower part of the outer housing.
  • the same reference numbers are assigned to the parts analogous to the embodiment according to FIG. 2 in FIG. 3. 4, which shows the installation of the control valve 15 arranged at the top left in FIG. 2 on a larger scale, shows the exact design of the diffuser 18 and its position relative to the valve housing 17 and the inner housing upper part 24.
  • the fully drawn outline of the diffuser defines a first embodiment in which an annular collar in the region of the valve seat 27 has an outer conical surface 28 which bears against a corresponding inner conical surface in the valve housing 17.
  • a locking screw 34 is provided in the housing 17, which engages with axial play in a bore 35 in the cylindrical shoulder 29 and prevents displacement of the diffuser 18 when the turbine is cold when the diffuser is not stuck in the valve housing .
  • the valve housing 17 is made of cast ferrite
  • the diffuser 18, however, is made of austenitic steel, the thermal expansion coefficient of which is greater than that of the Cast iron, so that due to the tight fit of the diffuser in the valve housing, the diffuser is clamped in the valve housing when the turbine is warm.
  • the diffuser in the valve housing becomes loose again, so that it can be pulled out without difficulty when the valve is dismantled.
  • a cylindrical shoulder 36 is provided with greater play relative to the bore in the valve housing, the outline of which is indicated by the dash-dotted lines.
  • the support shoulder can be conical in the same way as in the first-mentioned embodiment or can be designed as a flat, annular support surface.
  • This embodiment in conjunction with the spherically formed valve closing body 25, which is movably connected to the valve spindle (not shown), ensures that the relative movement between the outer and inner housing upper parts 20 and 24 caused by different thermal expansions occurs without tension, ie, without deformation , can adjust to the respective position of the connecting piece 32 relative to the valve housing 17.
  • the bolt end of the locking screw must also engage in the corresponding bore in the cylindrical shoulder 36 with play in the longitudinal axis of the bolt, in order not to hinder the adjustment movement of the diffuser.
  • a support ring 37 enclosing the diffuser 18 with a small clearance can be provided, particularly in the case of long diffusers. This is on his Clamped circumference in the sealing joint and can also serve as a guide for inserting the diffuser into the turbine during assembly.
  • valves of the known types it is possible to carry out assembly and disassembly without having to dismantle the lines leading from the valves into the turbine.
  • the valves of the known types it is not possible to remove them from the housing in horizontal installation because of the diffuser projecting into the outer housing without having to also remove the lines leading to the valve.
  • the diffuser cannot be pulled out, so that the valve must be pushed out of the turbine by a distance that is at least equal to the length of the diffuser part protruding into the turbine.
  • this since, as I said, this is only possible after the line in front of the valve has been removed, this is impossible because of the difficulties involved! the horizontal installation of such valves in two-casing turbines.
  • the diffuser can be pulled out after loosening the locking screw 34, after which the upper part of the turbine housing can be removed for inspection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Turbines (AREA)
  • Lift Valve (AREA)
EP84105095A 1983-06-09 1984-05-05 Turbine à carter double avec au moins une soupape pour l'alimentation horizontale de la vapeur Expired EP0128343B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3164/83A CH665450A5 (de) 1983-06-09 1983-06-09 Ventil fuer horizontale dampfzufuehrung an zweigehaeuseturbinen.
CH3164/83 1983-06-09

Publications (2)

Publication Number Publication Date
EP0128343A1 true EP0128343A1 (fr) 1984-12-19
EP0128343B1 EP0128343B1 (fr) 1987-07-15

Family

ID=4250001

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84105095A Expired EP0128343B1 (fr) 1983-06-09 1984-05-05 Turbine à carter double avec au moins une soupape pour l'alimentation horizontale de la vapeur

Country Status (8)

Country Link
US (1) US4642025A (fr)
EP (1) EP0128343B1 (fr)
JP (1) JPS606004A (fr)
CH (1) CH665450A5 (fr)
CS (1) CS259519B2 (fr)
DE (1) DE3464782D1 (fr)
PL (1) PL145914B1 (fr)
YU (1) YU43572B (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3506538A1 (de) * 1985-01-31 1986-08-07 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Hochdruckturbine
US4697983A (en) * 1984-10-15 1987-10-06 Hitachi, Ltd. Steam introducing part structure of steam turbine
WO2009019151A1 (fr) * 2007-08-08 2009-02-12 Siemens Aktiengesellschaft Conduite de vapeur pour une turbine à vapeur
EP2211022A1 (fr) * 2009-01-21 2010-07-28 Siemens Aktiengesellschaft Volute d'entrée d'une turbine à vapeur et turbine à vapeur
EP2216513A1 (fr) * 2009-02-10 2010-08-11 Siemens Aktiengesellschaft Raccordement de soupape sur une turbomachine à trois coques
EP2216512A1 (fr) * 2009-02-10 2010-08-11 Siemens Aktiengesellschaft Turbine à vapeur à trois coques
EP2216515A1 (fr) * 2009-02-10 2010-08-11 Siemens Aktiengesellschaft Turbine à vapeur à trois coques avec une soupape
EP2216514A1 (fr) * 2009-02-10 2010-08-11 Siemens Aktiengesellschaft Turbine à vapeur à trois coques avec une soupape
CN103769541A (zh) * 2014-01-23 2014-05-07 中国人民解放军总参谋部第六十研究所 蜗壳中心分模成型方法及其成型工装

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4940383A (en) * 1989-07-21 1990-07-10 Westinghouse Electric Corp. System for admitting steam into a turbine
US5037269A (en) * 1990-01-26 1991-08-06 Westinghouse Electric Corp. Self-locking nozzle blocks for steam turbines
DE19704541A1 (de) * 1997-02-06 1998-04-23 Siemens Ag Einströmabschnitt eines Turbinengehäuses
DE19704556C1 (de) * 1997-02-06 1998-04-30 Siemens Ag Einströmabschnitt eines Turbinengehäuses
DE59804590D1 (de) 1997-04-28 2002-08-01 Siemens Ag Vorrichtung zur wärmeisolierung für eine dampfturbine
DE19815168C2 (de) 1998-04-04 2001-02-22 Man Turbomasch Ag Ghh Borsig Rohrleitungsdurchführung durch zwei oder mehrere Wandungen eines Axialkompressors einer Gasturbine
EP1076725B1 (fr) * 1998-04-23 2010-01-20 ALSTOM Technology Ltd Procede et appareil de degauchissage de carters de turbines
US6071073A (en) * 1998-05-14 2000-06-06 Dresser-Rand Company Method of fabricating a turbine inlet casing and the turbine inlet casing
DE59907932D1 (de) 1999-02-04 2004-01-15 Alstom Switzerland Ltd Dampfturbine
DE59910136D1 (de) * 1999-04-21 2004-09-09 Alstom Technology Ltd Baden Diffusor
US6638014B2 (en) 2001-08-17 2003-10-28 Alstom (Switzerland) Ltd Valve arrangement for a power plant
EP1719880A1 (fr) * 2005-05-03 2006-11-08 Siemens Aktiengesellschaft Turbine à vapeur
JP2010048216A (ja) * 2008-08-25 2010-03-04 Fuji Electric Systems Co Ltd 蒸気タービンの主蒸気流入部
CH699864A1 (de) * 2008-10-31 2010-05-14 Alstom Technology Ltd Dampfturbine.
DE102010053951B4 (de) * 2010-12-09 2021-12-09 Daimler Ag Turbine für einen Abgasturbolader
JP6004947B2 (ja) * 2013-01-08 2016-10-12 三菱日立パワーシステムズ株式会社 蒸気タービン
EP2811207A1 (fr) * 2013-06-06 2014-12-10 Alstom Technology Ltd Ensemble de soupape
JP7005464B2 (ja) * 2018-09-28 2022-01-21 株式会社東芝 蒸気タービン車室
JP2020097894A (ja) * 2018-12-17 2020-06-25 東芝エネルギーシステムズ株式会社 タービン車室

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE943052C (de) * 1953-08-14 1956-05-09 Bbc Brown Boveri & Cie Anordnung der Duesenkaesten einer Hoechsttemperatur-Dampf-oder Gasturbine
DE1042606B (de) * 1954-01-27 1958-11-06 Siemens Ag Befestigung des Duesentraegers in einer Dampf- oder Gasturbine fuer hohe Druecke und Temperaturen
GB813330A (en) * 1956-04-25 1959-05-13 Rateau Soc Improvements in or relating to turbines
CH389646A (de) * 1960-08-17 1965-03-31 Siemens Ag Wärmekraftmaschine, insbesondere Dampfturbine für hohe Temperaturen und Drücke
US3190612A (en) * 1963-03-05 1965-06-22 Westinghouse Electric Corp Elastic fluid flow control apparatus
FR1474475A (fr) * 1967-06-08

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2527446A (en) * 1948-09-17 1950-10-24 Westinghouse Electric Corp Turbine apparatus
US2905434A (en) * 1954-07-08 1959-09-22 Westinghouse Electric Corp Turbine apparatus
GB837975A (en) * 1955-09-30 1960-06-22 Gen Electric Nozzlebox structure for elastic fluid turbines
NL7203334A (fr) * 1972-03-14 1973-09-18

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1474475A (fr) * 1967-06-08
DE943052C (de) * 1953-08-14 1956-05-09 Bbc Brown Boveri & Cie Anordnung der Duesenkaesten einer Hoechsttemperatur-Dampf-oder Gasturbine
DE1042606B (de) * 1954-01-27 1958-11-06 Siemens Ag Befestigung des Duesentraegers in einer Dampf- oder Gasturbine fuer hohe Druecke und Temperaturen
GB813330A (en) * 1956-04-25 1959-05-13 Rateau Soc Improvements in or relating to turbines
CH389646A (de) * 1960-08-17 1965-03-31 Siemens Ag Wärmekraftmaschine, insbesondere Dampfturbine für hohe Temperaturen und Drücke
US3190612A (en) * 1963-03-05 1965-06-22 Westinghouse Electric Corp Elastic fluid flow control apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 8, Nr. 20 (M-271)[1457], 27. Januar 1984; & JP-A-58 178 806 (TOKYO SHIBAURA DENKI K.K.) 19.10.1983 *

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4697983A (en) * 1984-10-15 1987-10-06 Hitachi, Ltd. Steam introducing part structure of steam turbine
DE3506538A1 (de) * 1985-01-31 1986-08-07 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Hochdruckturbine
WO2009019151A1 (fr) * 2007-08-08 2009-02-12 Siemens Aktiengesellschaft Conduite de vapeur pour une turbine à vapeur
EP2025873A1 (fr) * 2007-08-08 2009-02-18 Siemens Aktiengesellschaft Introduction de vapeur pour une turbine à vapeur
US8454302B2 (en) 2007-08-08 2013-06-04 Siemens Aktiengesellschaft Steam feed for a steam turbine
CN101772621B (zh) * 2007-08-08 2013-05-15 西门子公司 汽轮机的供汽装置
EP2211022A1 (fr) * 2009-01-21 2010-07-28 Siemens Aktiengesellschaft Volute d'entrée d'une turbine à vapeur et turbine à vapeur
EP2216514A1 (fr) * 2009-02-10 2010-08-11 Siemens Aktiengesellschaft Turbine à vapeur à trois coques avec une soupape
EP2216515A1 (fr) * 2009-02-10 2010-08-11 Siemens Aktiengesellschaft Turbine à vapeur à trois coques avec une soupape
WO2010091941A1 (fr) * 2009-02-10 2010-08-19 Siemens Aktiengesellschaft Turbine à vapeur à triple enveloppe
WO2010091940A1 (fr) * 2009-02-10 2010-08-19 Siemens Aktiengesellschaft Raccordement de soupape à une turbomachine à trois coques
WO2010091929A1 (fr) * 2009-02-10 2010-08-19 Siemens Aktiengesellschaft Turbine à vapeur à triple enveloppe comprenant une soupape
WO2010091928A1 (fr) * 2009-02-10 2010-08-19 Siemens Aktiengesellschaft Turbine à vapeur à triple coque avec vanne
CN102317580A (zh) * 2009-02-10 2012-01-11 西门子公司 三壳式蒸汽轮机
EP2216512A1 (fr) * 2009-02-10 2010-08-11 Siemens Aktiengesellschaft Turbine à vapeur à trois coques
EP2216513A1 (fr) * 2009-02-10 2010-08-11 Siemens Aktiengesellschaft Raccordement de soupape sur une turbomachine à trois coques
CN102317580B (zh) * 2009-02-10 2014-08-27 西门子公司 三壳式蒸汽轮机
CN103769541A (zh) * 2014-01-23 2014-05-07 中国人民解放军总参谋部第六十研究所 蜗壳中心分模成型方法及其成型工装
CN103769541B (zh) * 2014-01-23 2017-02-01 中国人民解放军总参谋部第六十研究所 蜗壳中心分模成型方法及其成型工装

Also Published As

Publication number Publication date
DE3464782D1 (en) 1987-08-20
PL248097A1 (en) 1985-01-30
PL145914B1 (en) 1988-11-30
YU94484A (en) 1988-12-31
JPS606004A (ja) 1985-01-12
CS259519B2 (en) 1988-10-14
JPH0377367B2 (fr) 1991-12-10
US4642025A (en) 1987-02-10
EP0128343B1 (fr) 1987-07-15
YU43572B (en) 1989-08-31
CS432884A2 (en) 1987-12-17
CH665450A5 (de) 1988-05-13

Similar Documents

Publication Publication Date Title
EP0128343B1 (fr) Turbine à carter double avec au moins une soupape pour l'alimentation horizontale de la vapeur
EP0213297B1 (fr) Moyen de connexion entre les carters d'un groupe de turbines
DE1539991C3 (fr)
DE1539992A1 (de) Strahlpumpensystem fuer den Kuehlmittelkreislauf eines Kernreaktors
DE4212945A1 (de) Vorrichtung zur reparatur oder umkonstruktion eines ventils
DE2304875C2 (de) Vorrichtung zum Einblasen von Heisswind in einen Schachtofen, insbesondere Hochofen
DE2260596A1 (de) Anordnung zur uebertragung hydraulischer steuervorgaenge in einem kernreaktor
WO2013060748A1 (fr) Refroidisseur à injection
EP0685054B1 (fr) Soupape permettant de desurchauffer la vapeur
EP0058439B1 (fr) Liaison à cardan pour tuyau avec compensation de la dilatation longitudinale
DE2712307A1 (de) Einrichtung zum absperren zweier koaxialer rohrleitungen
DE2158163A1 (de) Dampfturbine
DE2260595A1 (de) Regeleinrichtung fuer kernreaktoren
DE1002580B (de) Schieber fuer Rohrleitungen, insbesondere fuer Heisswindleitungen von Hochofenanlagen
CH625030A5 (fr)
EP0095662B1 (fr) Réacteur nucléaire à haute température avec conduit de gaz chaud qui est détachable de la cuve du réacteur
DE102004012599A1 (de) Druckentlastung einer Flanschverbindung in Überströmleitungen zwischen Frischdampfventil und HD-Dampfturbineneintritt
EP1602423B1 (fr) Raccord pour l'accouplement d'une poche métallurgique aux conduits de gaz de traitement
DE1030358B (de) Befestigung eines Duesenkastens im Innengehaeuse einer Doppelgehaeuse-Hochtemperaturturbine
DE19635464B4 (de) Ventil für eine Heißdampf-Umformstation
DE2730520A1 (de) Druckmittelbetaetigtes ventil
DE2408678C3 (de) Steuerventil mit einem hohlzylindrischen, entlasteten Ventilkörper
DE2740761A1 (de) Dampfkraftwerk
EP0208056B1 (fr) Valve de décharge de sécurité
DE830054C (de) Seiten-Stehbolzen, insbesondere fuer Lokomotivkessel

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): CH DE FR GB LI SE

17P Request for examination filed

Effective date: 19841109

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB LI SE

REF Corresponds to:

Ref document number: 3464782

Country of ref document: DE

Date of ref document: 19870820

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19890823

Year of fee payment: 6

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

Ref country code: LI

Effective date: 19900531

Ref country code: CH

Effective date: 19900531

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: SE

Payment date: 19910425

Year of fee payment: 8

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

Ref country code: SE

Effective date: 19920506

EUG Se: european patent has lapsed

Ref document number: 84105095.8

Effective date: 19921204

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

Ref country code: GB

Payment date: 20000410

Year of fee payment: 17

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

Ref country code: FR

Payment date: 20000418

Year of fee payment: 17

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

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010505

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20010505

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

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020131

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

Ref country code: DE

Payment date: 20030514

Year of fee payment: 20