EP0115451B1 - Roue pour compresseur centrifuge et procédé pour sa fabrication - Google Patents

Roue pour compresseur centrifuge et procédé pour sa fabrication Download PDF

Info

Publication number
EP0115451B1
EP0115451B1 EP84400027A EP84400027A EP0115451B1 EP 0115451 B1 EP0115451 B1 EP 0115451B1 EP 84400027 A EP84400027 A EP 84400027A EP 84400027 A EP84400027 A EP 84400027A EP 0115451 B1 EP0115451 B1 EP 0115451B1
Authority
EP
European Patent Office
Prior art keywords
rotor
vanes
fibres
shaft
filaments
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
EP84400027A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0115451A3 (en
EP0115451A2 (fr
Inventor
Philippe Marchal
André Koenig
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.)
ARAP - APPLICATIONS RATIONNELLES de la PHYSIQUE Sarl
Original Assignee
ARAP - APPLICATIONS RATIONNELLES de la PHYSIQUE Sarl
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 ARAP - APPLICATIONS RATIONNELLES de la PHYSIQUE Sarl filed Critical ARAP - APPLICATIONS RATIONNELLES de la PHYSIQUE Sarl
Priority to AT84400027T priority Critical patent/ATE23211T1/de
Publication of EP0115451A2 publication Critical patent/EP0115451A2/fr
Publication of EP0115451A3 publication Critical patent/EP0115451A3/fr
Application granted granted Critical
Publication of EP0115451B1 publication Critical patent/EP0115451B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/284—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/10—Metals, alloys or intermetallic compounds
    • F05D2300/12—Light metals
    • F05D2300/123—Boron
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/20—Oxide or non-oxide ceramics
    • F05D2300/22—Non-oxide ceramics
    • F05D2300/224—Carbon, e.g. graphite
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/40—Organic materials
    • F05D2300/43—Synthetic polymers, e.g. plastics; Rubber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/40—Organic materials
    • F05D2300/43—Synthetic polymers, e.g. plastics; Rubber
    • F05D2300/433—Polyamides, e.g. NYLON
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
    • F05D2300/603—Composites; e.g. fibre-reinforced

Definitions

  • the invention relates to a wheel in particular for a high peripheral speed centrifugal compressor made from pre-molded, sector-shaped buckets, juxtaposed and glued to each other in the circumferential direction to form a unitary assembly with high mechanical resistance to rupture.
  • a centrifugal compressor essentially consists of a rotor and a stator.
  • the rotor has vanes rotating about an axis, responsible for driving the gas at their speed of rotation, in order to impart energy to it.
  • the stator in addition to constituting the casing of the machine, includes a part called a diffuser, responsible for transforming the pressure acquired by the gas into pressure.
  • the casing surrounding the rotor is of a relatively simple design.
  • closed-wheel rotors have the disadvantage of being limited in rotation speed (300 m / s for example), the external surface of revolution being subjected to greater centrifugal stresses than the blades, which leads to cracks between said blades and said outer surface, which increase with the speed of rotation.
  • wheels made of metal (steel, aluminum, titanium) are cast or mechanically welded, the first embodiment (cast) being more common in closed wheels and of small dimensions for reasons of weld accessibility.
  • the invention relates to a new compressor wheel according to the teaching of claim 1 and to its manufacturing method according to the teaching of claim 5, the wheel having the originality to have both a high resistance to breakage, a low specific mass (allowing very high peripheral speeds and larger wheel diameters) without having to use an expensive manufacturing process or machining.
  • This object is achieved by making the wheel from pre-molded, sector-shaped troughs, made of fibers of high mechanical strength, coupled together, in a circumferential direction, by bundles of radiating wires coated with a bonding agent. and taking up the centrifugal forces, whatever the specific speed of the wheel.
  • the fibers used for the manufacture of the buckets and wire bundles are preferably fibers of carbon, boron, aromatic polyamides or glass, and the bonding or sealing agent can be advantageously chosen from epoxy resins, polyimides or phenolic.
  • the invention relates, (deviating from the drawbacks of metal wheels, cast or mechanically welded), a new type of wheel having, for a specifically low mass, a high resistance mechanical at break and therefore at bursting and thereby allowing larger diameters and higher peripheral speeds than those resulting from compressor wheels hitherto known.
  • the wheels of centrifugal compressors are generally formed by a rotor 1 defined by vanes 2, one of the ends 2 i of which opens onto the face before said "intake", the other end 2 2 communicating with a fixed diffuser 3 itself in relation to a peripheral volute 4.
  • the fluid entering the channel delimited by the blades acquires pressure and speed therein , this speed being convertible into pressure in the diffuser.
  • the rotor is obviously driven in rotation by a control shaft 5 to which it is coupled, several wheels can be stepped on the same shaft.
  • the wheel is made from buckets 6 (Fig. 2) having the particularity of being made of fibers having a high mechanical resistance to rupture, each bucket being in the form of a sector to define in itself a channel.
  • the wheel is of modular type, since it consists of a series of buckets 6 juxtaposed in a circumferential direction and made integral with each other, to form a stable unitary assembly, by bundles of radiating wires 9 coated with a liaison officer.
  • the fibers used for making the buckets are preferably carbon fibers, although boron fibers, aromatic polyamides or even glass fibers can also be used. These fibers indeed make it possible to envisage, because of their high mechanical strength, high specific speeds, but it is however necessary, given the unidirectional nature of the fiber, to use specific morphologies so that the centrifugal forces are transmitted in the direction of the fiber and not perpendicular to them.
  • Figs. 3 and 4 show the method of manufacturing a wheel according to the invention. It is enough to place in a star, on a marble 7, the troughs in the shape of a sector, taking care to leave between their lateral flanks 6 1 radial interstices 8, the positioning of the troughs being facilitated by stabilizing pins 6 2 with which they are provided and which come to rest in the manner of a heel on the flat marble 7.
  • the buckets are coupled and sealed together by stacking beams of radiating wires 9 previously coated with a bonding agent, the chemical nature is compatible with the material constituting the buckets and that constituting the wires, for example, an epoxy-type resin, if the buckets and the bundles of wires are based on carbon fibers.
  • each radial gap 8 opens onto rods 11, integral with the marble and on which the connecting wires are wound.
  • This carbon fiber wheel can be coupled either to a metal axle, or to an axle also made of carbon fibers.
  • a metal axle or to an axle also made of carbon fibers.
  • axial channels obtained by pins 12 passing right through the wheel and which, when they are removed from the mold, form passages in which the fingers 13 forming the end of the drive shaft 14 will be introduced.
  • These fingers will be made integral with the wheel by a support plate 15 and nuts 16 fixed on the end of each of said fingers 13.
  • the drive shaft is made of carbon fibers, it will include, like the metal shaft, fingers 13, as illustrated in FIG. 5, but these will be positioned, inserted and sealed to the wheel, as the bundles of wires are stacked. It will suffice, in this case, that the plate 7 has a central opening for the passage of the shaft and that the fingers 13 are arranged between the axis 10 of the wheel and the ends of the buckets (as illustrated by the reference 12 in Fig. 3) so that the shaft is coupled to the wheel by coating the wires like the buckets. After cooling and removing the marble 7, the wheel and the drive shaft will form a unitary and homogeneous whole.
  • a cooking operation is then carried out in an oven, the temperature of which is defined by the type of resin used.
  • the troughs can be covered with a continuous tulip-shaped veil also produced from bonded carbon fibers, leaving, of course, the intake openings of the troughs free. emerging on the front face of the wheel, the opposite end of said buckets communicating in a known manner with a rotary diffuser having the general shape of an annular crown.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
EP84400027A 1983-01-26 1984-01-06 Roue pour compresseur centrifuge et procédé pour sa fabrication Expired EP0115451B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84400027T ATE23211T1 (de) 1983-01-26 1984-01-06 Laufrad eines zentrifugalverdichters und verfahren zu seiner herstellung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8301162A FR2539824A1 (fr) 1983-01-26 1983-01-26 Roue pour compresseur centrifuge et procede pour sa fabrication
FR8301162 1983-01-26

Publications (3)

Publication Number Publication Date
EP0115451A2 EP0115451A2 (fr) 1984-08-08
EP0115451A3 EP0115451A3 (en) 1984-08-22
EP0115451B1 true EP0115451B1 (fr) 1986-10-29

Family

ID=9285297

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84400027A Expired EP0115451B1 (fr) 1983-01-26 1984-01-06 Roue pour compresseur centrifuge et procédé pour sa fabrication

Country Status (10)

Country Link
US (1) US4676722A (enrdf_load_stackoverflow)
EP (1) EP0115451B1 (enrdf_load_stackoverflow)
JP (1) JPS59150997A (enrdf_load_stackoverflow)
KR (1) KR840007267A (enrdf_load_stackoverflow)
AT (1) ATE23211T1 (enrdf_load_stackoverflow)
BR (1) BR8400282A (enrdf_load_stackoverflow)
DE (1) DE3461115D1 (enrdf_load_stackoverflow)
ES (1) ES8500395A1 (enrdf_load_stackoverflow)
FR (1) FR2539824A1 (enrdf_load_stackoverflow)
IN (1) IN159386B (enrdf_load_stackoverflow)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2207629B (en) * 1987-07-22 1991-01-02 Rolls Royce Plc Method of manufacture of an axial flow compressor assembly
JPH0631633B2 (ja) * 1987-08-12 1994-04-27 株式会社ユニシアジェックス タ−ビン型燃料ポンプ
US5222866A (en) * 1988-09-30 1993-06-29 Societe Europeenne De Propulsion High speed composite turbine wheel
JPH04211232A (ja) * 1990-03-14 1992-08-03 Nikon Corp 遮光羽根用またはアーム用板材
DE4321173C2 (de) * 1993-06-25 1996-02-22 Inst Luft Kaeltetech Gem Gmbh Radiallaufrad
DE19513508A1 (de) * 1995-04-10 1996-10-17 Abb Research Ltd Verdichter
DE19525829A1 (de) * 1995-07-15 1997-01-16 Abb Research Ltd Lüfter
US5921754A (en) * 1996-08-26 1999-07-13 Foster-Miller, Inc. Composite turbine rotor
FI101564B1 (fi) 1997-01-17 1998-07-15 Flaekt Oy Korkeapainepuhallin
FI101565B (fi) * 1997-01-17 1998-07-15 Flaekt Woods Ab Haihdutinpuhallin ja sen siipipyörä
DE19708825C2 (de) * 1997-03-05 2001-11-15 Deutsch Zentr Luft & Raumfahrt Vorrichtung zum Fördern eines Mediums
DE10063653C2 (de) * 2000-12-20 2002-12-12 Daimler Chrysler Ag Ladepumpe, insbesondere Abgasturbolader
US6659723B2 (en) * 2001-11-16 2003-12-09 Illinois Tool Works Inc. Fan for an engine driven generator
JP2004285938A (ja) * 2003-03-24 2004-10-14 Matsushita Electric Ind Co Ltd 送風ファン
US7938627B2 (en) * 2004-11-12 2011-05-10 Board Of Trustees Of Michigan State University Woven turbomachine impeller
IT1394295B1 (it) 2009-05-08 2012-06-06 Nuovo Pignone Spa Girante centrifuga del tipo chiuso per turbomacchine, componente per tale girante, turbomacchina provvista di tale girante e metodo di realizzazione di tale girante
IT1397057B1 (it) * 2009-11-23 2012-12-28 Nuovo Pignone Spa Girante centrifuga e turbomacchina
IT1397058B1 (it) 2009-11-23 2012-12-28 Nuovo Pignone Spa Stampo per girante centrifuga, inserti per stampo e metodo per costruire una girante centrifuga
US8794914B2 (en) 2010-11-23 2014-08-05 GM Global Technology Operations LLC Composite centrifugal compressor wheel
ITCO20110064A1 (it) 2011-12-14 2013-06-15 Nuovo Pignone Spa Macchina rotante comprendente un rotore con una girante composita ed un albero metallico
US10193430B2 (en) 2013-03-15 2019-01-29 Board Of Trustees Of Michigan State University Electromagnetic device having discrete wires
ITCO20130067A1 (it) 2013-12-17 2015-06-18 Nuovo Pignone Srl Girante con elementi di protezione e compressore centrifugo
KR102004977B1 (ko) * 2019-04-04 2019-07-30 (주)웰크론 공기 부양선용 임펠러 제조방법
DE102020127312A1 (de) * 2020-10-16 2022-04-21 Ebm-Papst Mulfingen Gmbh & Co. Kg Lüfter mit einem Rotor und einem Lüfterrad

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2857094A (en) * 1955-07-19 1958-10-21 John R Erwin Integral plastic rotors
US3077297A (en) * 1960-10-24 1963-02-12 Stalker Corp Bladed rotors
GB1170593A (en) * 1967-04-12 1969-11-12 Rolls Royce Method of making a Bladed Rotor
US3518221A (en) * 1967-10-30 1970-06-30 Monsanto Co Reinforcing fillers in a matrix of two thermosetting resins
US3521973A (en) * 1968-08-16 1970-07-28 Anpol Research Corp Fan construction
US4098559A (en) * 1976-07-26 1978-07-04 United Technologies Corporation Paired blade assembly
JPS5458211A (en) * 1977-10-18 1979-05-10 Koken Kogyo Kk Preparation of impeller of turbo type fan
DE2800723C2 (de) * 1978-01-09 1986-03-20 Johnston Brothers (Engineering) Ltd., Redhill Laufrad für Gebläse
DE2937214A1 (de) * 1979-09-14 1981-04-02 Rhein-Bayern Fahrzeugbau GmbH & Co KG, 8950 Kaufbeuren Dreiflaechenstroemungsmaschine
US4465434A (en) * 1982-04-29 1984-08-14 Williams International Corporation Composite turbine wheel

Also Published As

Publication number Publication date
JPS59150997A (ja) 1984-08-29
ATE23211T1 (de) 1986-11-15
US4676722A (en) 1987-06-30
ES529200A0 (es) 1984-10-01
BR8400282A (pt) 1984-08-28
KR840007267A (ko) 1984-12-06
FR2539824A1 (fr) 1984-07-27
EP0115451A3 (en) 1984-08-22
EP0115451A2 (fr) 1984-08-08
IN159386B (enrdf_load_stackoverflow) 1987-05-09
DE3461115D1 (en) 1986-12-04
FR2539824B1 (enrdf_load_stackoverflow) 1985-05-10
ES8500395A1 (es) 1984-10-01

Similar Documents

Publication Publication Date Title
EP0115451B1 (fr) Roue pour compresseur centrifuge et procédé pour sa fabrication
EP0942174B1 (fr) Roue de ventilation centrifuge en matériaux composites
EP0330562B1 (fr) Perfectionnements aux rotors induits des ralentisseurs électromagnétiques
FR2567052A1 (fr) Elements a aubes d'une seule piece
FR2476766A1 (fr) Ensemble pales-disque en materiau composite et fait d'une seule piece
JP5523488B2 (ja) ターボ機械のためのロータ
EP0761978A1 (fr) Turbine en matériau composite thermostructural, en particulier à grand diamètre, et procédé pour sa fabrication
EP1481756B1 (fr) Procédé de fabrication d'une aube creuse pour turbomachine
CN107250553A (zh) 叶轮及制造这种叶轮的方法
FR2931719A1 (fr) Procede de remplacement d'un profil composite.
EP4313574A1 (fr) Aube comprenant une structure en matériau composite et procédé de fabrication associé
FR2510178A1 (fr) Dispositif pour assembler une roue a aubes en matiere ceramique, notamment une roue de turbine de turbomachine, telle qu'une turbine a gaz, avec un arbre metallique
FR2728115A1 (fr) Rotor pour une machine electrique, et son procede de fabrication
CN1308597C (zh) 涡轮风扇及其制造方法
FR2587938A1 (fr) Structure enroulee de filaments comportant des anneaux de renforcement enroules de filaments, utilisable comme transmission de couple
CA2589077C (fr) Procede de fabrication d'un disque de rotor de turbomachine
EP0153221A1 (fr) Procédé de réalisation d'une roue à aubes fermée
CA2080532C (fr) Rotor multipale, notamment pour helice arriere anticouple d'helicoptere et procede pour sa realisation
FR2504209A1 (fr) Roue de turbomachine radiale en materiaux composites, moyeu et inducteur metalliques
WO2022117938A1 (fr) Hybridation des fibres du renfort fibreux d'une aube de soufflante
EP1692412B1 (fr) Rotor de ralentisseur electromagnetique comportant des ailettes perfectionnees de refroidissement
EP2287445A1 (fr) Tambour de rotor de compresseur axial avec voile composite
EP3607211A1 (fr) Diffuseur axial renforcé
FR2641324A1 (fr) Fixation de pied d'ailette pour une ailette de rotor en technique de fibre
FR2465643A2 (fr) Rotor pour appareil a voilure tournante

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

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT BE CH DE GB IT LI NL SE

AK Designated contracting states

Designated state(s): AT BE CH DE GB IT LI NL SE

17P Request for examination filed

Effective date: 19841001

18W Application withdrawn

Withdrawal date: 19860415

D18W Application withdrawn (deleted)
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

ITF It: translation for a ep patent filed
AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE GB IT LI NL SE

REF Corresponds to:

Ref document number: 23211

Country of ref document: AT

Date of ref document: 19861115

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3461115

Country of ref document: DE

Date of ref document: 19861204

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: 19921221

Year of fee payment: 10

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

Ref country code: GB

Payment date: 19921222

Year of fee payment: 10

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

Ref country code: SE

Payment date: 19921223

Year of fee payment: 10

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

Ref country code: BE

Payment date: 19921230

Year of fee payment: 10

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

Ref country code: DE

Payment date: 19930108

Year of fee payment: 10

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

Ref country code: AT

Payment date: 19930127

Year of fee payment: 10

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19930131

Year of fee payment: 10

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

Ref country code: GB

Effective date: 19940106

Ref country code: AT

Effective date: 19940106

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

Ref country code: SE

Effective date: 19940107

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

Ref country code: LI

Effective date: 19940131

Ref country code: CH

Effective date: 19940131

Ref country code: BE

Effective date: 19940131

BERE Be: lapsed

Owner name: ARAP - APPLICATIONS RATIONNELLES DE LA PHYSIQUE S

Effective date: 19940131

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

Ref country code: NL

Effective date: 19940801

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

Effective date: 19940106

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: DE

Effective date: 19941001

EUG Se: european patent has lapsed

Ref document number: 84400027.3

Effective date: 19940810