EP1185795B1 - Dispositif d'equilibrage pour pompes centrifuges a etages multiples - Google Patents

Dispositif d'equilibrage pour pompes centrifuges a etages multiples Download PDF

Info

Publication number
EP1185795B1
EP1185795B1 EP00941982A EP00941982A EP1185795B1 EP 1185795 B1 EP1185795 B1 EP 1185795B1 EP 00941982 A EP00941982 A EP 00941982A EP 00941982 A EP00941982 A EP 00941982A EP 1185795 B1 EP1185795 B1 EP 1185795B1
Authority
EP
European Patent Office
Prior art keywords
axial
thrust
gap
relieving
centrifugal pump
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 - Lifetime
Application number
EP00941982A
Other languages
German (de)
English (en)
Other versions
EP1185795A1 (fr
Inventor
Baogang Wang
Bernhard Brecht
Jürgen Schill
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.)
KSB AG
Original Assignee
KSB 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
Application filed by KSB AG filed Critical KSB AG
Publication of EP1185795A1 publication Critical patent/EP1185795A1/fr
Application granted granted Critical
Publication of EP1185795B1 publication Critical patent/EP1185795B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/041—Axial thrust balancing
    • F04D29/0413—Axial thrust balancing hydrostatic; hydrodynamic thrust bearings
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/041—Axial thrust balancing
    • F04D29/0416—Axial thrust balancing balancing pistons

Definitions

  • the invention relates to a device for receiving the axial thrust of a Multi-stage centrifugal pump, with a relief device, which one or has multiple axial column and one or more radial gaps and at which is guided over the column a discharge current, and with a the remaining residual thrust receiving thrust bearing, the thrust bearing a assigned to the compensation of misalignment serving gimbal ring is.
  • a relief device which one or has multiple axial column and one or more radial gaps and at which is guided over the column a discharge current, and with a the remaining residual thrust receiving thrust bearing, the thrust bearing a assigned to the compensation of misalignment serving gimbal ring is.
  • the resulting respectively by the discharge current gap losses are in the three versions of different heights. So, above all, has the simple Relief piston surrounding radial gap a large gap current and thus a high efficiency drop of the centrifugal pump result.
  • the gap loss a stepped piston relief device, which - depending on the number of stages - on at least two radial gaps and one each between the radial gaps arranged axial gap has, however, is already much lower. Common to the two working with piston designs that they still need a thrust bearing, which receives a remaining residual thrust.
  • the version with relief disc needs such a thrust bearing basically not, since the relief disc acts self-regulating. Since the this essential axial gap between relief disc and not rotating counter-disc sets very tight, also the leakage of this remains Version relatively small. However, it can be used with centrifugal pumps high end pressures and high performance in transient driving style to a Slip the relief disc come on the opposite disc. But that is the reliability of such pumps no longer guaranteed.
  • the invention has for its object to provide a relief device which has minimal leakage with high reliability.
  • the relief device is designed so that In all operating conditions, a residual thrust results in the direction of the suction side the centrifugal pump acts, and that the gimbal ring is dimensioned so that he is elastically deformed by the residual thrust, wherein the spring constant of the Kardanic ring has such a characteristic that, starting from a maximum gap width at rest of the centrifugal pump, the axial gap under operating conditions to a minimum width, at which a Touch the axial gap limiting surfaces is still avoided.
  • the relief device a stepped piston with multiple axial Columns, the said condition applies to all axial column.
  • the invention is not only in relief with double piston or multi-stage piston use. It can also be used with relief discs be applied. Although caused an additional thrust bearing with gimbal Ring in a device with relief disc an increased effort. There but thus the reliability of centrifugal pumps with high end pressures and to ensure great performance even with transient driving is at least there justified the effort.
  • the invention is primarily in cooperation with a hydrodynamic Thrust bearing can be used with advantage.
  • the double piston 4 is an inventive Relief device attached on the shaft 2, moreover, the double piston 4 is an inventive Relief device attached.
  • the double piston 4 is surrounded by a Housing part 5, with which it forms two radial gaps 6 and 7. Between radial gaps 6 and 7 is an axial gap 8.
  • the axial gap 8 has a variable width s.
  • the thrust bearing 9 is a gimbal Ring 10 assigned.
  • the gimbal 10 initially serves in a known manner To compensate for misalignment, when mounting a multi-stage Centrifugal pump are inevitable. But it is new that the gimbal ring 10 so is dimensioned that it by the residual thrust occurring in the centrifugal pump is elastically deformed.
  • the spring constant of the gimbal ring is 10 adapted to the other conditions of the discharge device:
  • the relief device is designed so that in all operating conditions the centrifugal pump gives a residual thrust, which acts in the direction of the suction side.
  • the centrifugal pump is now characterized by an elastic deformation of the gimbal Ringes 10 of the gap 8 under operating conditions to a predetermined Minimum width closed, in which a touch of the gap. 8 delimiting surfaces of the double piston 4 and the housing part 5 still is avoided.
  • the relief device according to the invention Assume that the axial gap 8 has a self-regulating function, as in Similarly, in a relief disc is the case.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (6)

  1. Dispositif d'absorption de la poussée axiale d'une pompe centrifuge à étages multiples, comportant un dispositif d'équilibrage qui possède une fente axiale (8) et une ou plusieurs fentes radiales (6, 7) et dans lequel un flux d'équilibrage est guidé par les fentes (6, 7, 8) et un palier axial (9) absorbant la poussée résiduelle subsistante, un anneau de type cardan (10) servant à compenser les défauts d'alignement étant associé au palier axial (9), caractérisé en ce que le dispositif d'équilibrage est conçu de manière à ce qu'apparaisse, dans toutes les positions de fonctionnement, une poussée résiduelle qui agit dans le sens du côté d'aspiration de la pompe centrifuge, et que l'anneau de type cardan (10) est dimensionné de manière à être déformé élastiquement par la poussée résiduelle, la constante de rappel de l'anneau de type cardan (10) possédant une caractéristique telle qu'à partir d'une largeur maximale de fente (s), en position de repos de la pompe centrifuge, la fente axiale (8) se ferme dans les conditions de fonctionnement jusqu'à une largeur minimale dans laquelle un contact avec les surfaces délimitant la fente axiale (8) est encore évité.
  2. Dispositif d'absorption de la poussée axiale d'une pompe centrifuge à étages multiples, comportant un dispositif d'équilibrage qui possède plusieurs fentes axiales et radiales (6, 7, 8) et dans lequel un flux d'équilibrage est guidé par les fentes (6, 7, 8) et un palier axial (9) absorbant la poussée résiduelle subsistante, un anneau de type cardan (10) servant à compenser les défauts d'alignement étant associé au palier axial (9), caractérisé en ce que le dispositif d'équilibrage est conçu de manière à ce qu'apparaisse, dans toutes les positions de fonctionnement, une poussée résiduelle qui agit dans le sens du côté d'aspiration de la pompe centrifuge, et que l'anneau de type cardan (10) est dimensionné de manière à être déformé élastiquement par la poussée résiduelle, la constante de rappel de l'anneau de type cardan (10) possédant une caractéristique telle qu'à partir d'une largeur maximale de fente (s), en position de repos de la pompe centrifuge, les fentes axiales se ferment dans les conditions de fonctionnement jusqu'à une largeur minimale dans laquelle un contact avec les surfaces délimitant les fentes axiales est encore évité.
  3. Dispositif selon la revendication 1, caractérisé en ce que le dispositif d'équilibrage est constitué par un double piston (4) comportant une fente axiale (8) placée entre les deux parties du piston.
  4. Dispositif selon la revendication 2, caractérisé en ce que le dispositif d'équilibrage est constitué par un piston à étages comportant respectivement une fente axiale placée entre deux étages.
  5. Dispositif selon la revendication 1, caractérisé en ce que le dispositif d'équilibrage est constitué par un disque d'équilibrage qui constitue avec un contre-disque placé du côté de la carcasse une fente axiale.
  6. Dispositif selon une des revendications 1 à 5, caractérisé en ce qu'on utilise comme palier axial un palier axial hydrodynamique (9).
EP00941982A 1999-06-15 2000-05-25 Dispositif d'equilibrage pour pompes centrifuges a etages multiples Expired - Lifetime EP1185795B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19927135A DE19927135A1 (de) 1999-06-15 1999-06-15 Entlastungseinrichtung für mehrstufige Kreiselpumpen
DE19927135 1999-06-15
PCT/EP2000/004754 WO2000077405A1 (fr) 1999-06-15 2000-05-25 Dispositif d'equilibrage pour pompes centrifuges a etages multiples

Publications (2)

Publication Number Publication Date
EP1185795A1 EP1185795A1 (fr) 2002-03-13
EP1185795B1 true EP1185795B1 (fr) 2003-07-30

Family

ID=7911219

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00941982A Expired - Lifetime EP1185795B1 (fr) 1999-06-15 2000-05-25 Dispositif d'equilibrage pour pompes centrifuges a etages multiples

Country Status (6)

Country Link
US (1) US6568901B2 (fr)
EP (1) EP1185795B1 (fr)
AT (1) ATE246318T1 (fr)
BR (1) BR0011590A (fr)
DE (2) DE19927135A1 (fr)
WO (1) WO2000077405A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018210842A1 (de) 2018-07-02 2020-01-02 KSB SE & Co. KGaA Anordnung zur Aufnahme des Axialschubes einer Kreiselpumpe

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE50206223D1 (de) * 2001-10-22 2006-05-18 Sulzer Pumpen Ag Wellenabdichtungsanordnung für eine Pumpe zur Förderung heisser Fluide
DE10254041B4 (de) * 2002-11-20 2011-07-07 KSB Aktiengesellschaft, 67227 Verfahren und Vorichtung zur Störungsfrüherkennung bei Kreiselpumpen
MX2011002665A (es) 2008-09-10 2011-07-28 Pentair Pump Group Inc Bomba centrifuga de multiples etapas, de alta eficiencia y metodo para ensamblado.
IT1392143B1 (it) * 2008-09-15 2012-02-22 Pompe Garbarino S P A Pompa centrifuga multistadio con tamburo di bilanciamento idraulico a trafilamento controllato.
DE102013223806A1 (de) 2013-11-21 2015-05-21 Ksb Aktiengesellschaft Entlastungseinrichtung
EP3171033A1 (fr) * 2015-11-19 2017-05-24 Grundfos Holding A/S Pompe centrifuge à étages multiples avec ouverture de carter pour la maintenance d'un piston d'équilibrage de poussée axiale
EP3412915B1 (fr) * 2017-06-09 2019-12-25 Xylem Europe GmbH Système de tambour autoréglable
DE102019001120A1 (de) 2019-02-15 2020-08-20 KSB SE & Co. KGaA Entlastungseinrichtung
EP3832143A1 (fr) * 2019-12-02 2021-06-09 Sulzer Management AG Pompe dotée d'un dispositif de levage
DE102020133327B4 (de) 2020-12-14 2023-01-19 KSB SE & Co. KGaA Pumpenanordnung

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE872136C (de) * 1949-09-17 1953-03-30 Basf Ag Lagerung fuer ein- und mehrstufige Stroemungsmaschinen mit stehend, etwa senkrecht angeordneter Laeuferwelle
DE886250C (de) * 1951-11-10 1953-08-13 Klein Abhebevorrichtung fuer Entlastungsscheiben von Kreiselmaschinen
US3393947A (en) * 1966-04-13 1968-07-23 United Aircraft Corp Two-directional axial thrust balancer
GB1211243A (en) * 1966-11-12 1970-11-04 Zabranska Fabryka Masz Gornicz Axial balancing arrangement in a rotodynamic pump
USRE28540E (en) * 1971-02-02 1975-09-02 Composite knockdown pump
DE3023219A1 (de) * 1980-06-21 1982-01-07 Klein, Schanzlin & Becker Ag, 6710 Frankenthal Turbopumpe
RU2083860C1 (ru) * 1988-05-23 1997-07-10 Конструкторское бюро химавтоматики Турбонасосный агрегат
DE29500744U1 (de) * 1995-01-18 1996-05-15 Sihi Ind Consult Gmbh Strömungsmaschine mit Entlastungskolben
JP3646740B2 (ja) * 1995-06-27 2005-05-11 石川島播磨重工業株式会社 バランスピストン機構を備えたターボポンプ
DE19640734B4 (de) * 1996-10-02 2005-06-23 Ksb Ag Axiallager für eine Gliederpumpe
US5980114A (en) * 1997-01-20 1999-11-09 Oklejas, Jr.; Eli Thrust bearing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018210842A1 (de) 2018-07-02 2020-01-02 KSB SE & Co. KGaA Anordnung zur Aufnahme des Axialschubes einer Kreiselpumpe
DE102018210842B4 (de) 2018-07-02 2020-01-16 KSB SE & Co. KGaA Anordnung zur Aufnahme des Axialschubes einer Kreiselpumpe
US11536274B2 (en) 2018-07-02 2022-12-27 KSB SE & Co. KGaA Arrangement for receiving the axial thrust of a centrifugal pump

Also Published As

Publication number Publication date
DE19927135A1 (de) 2000-12-21
WO2000077405A1 (fr) 2000-12-21
BR0011590A (pt) 2002-04-23
ATE246318T1 (de) 2003-08-15
US20020114713A1 (en) 2002-08-22
US6568901B2 (en) 2003-05-27
DE50003122D1 (de) 2003-09-04
EP1185795A1 (fr) 2002-03-13

Similar Documents

Publication Publication Date Title
EP1185795B1 (fr) Dispositif d'equilibrage pour pompes centrifuges a etages multiples
EP1078166B2 (fr) Pompe a vide a friction dotee d'un stator et d'un rotor
DE3122598C1 (de) Regelbare Fluegelzellenpumpe
EP1252445B1 (fr) Pompe turbo-moléculaire
EP0874159A2 (fr) Pompe à vide à friction avec étage du type à canal de Gaede
EP3071840B1 (fr) Dispositif de décharge
EP1090231B2 (fr) Pompe a vide rotative munie d'un chassis, d'un rotor et d'un carter, et dispositif pourvu d'une pompe a vide rotative de ce type
DE4209840A1 (de) Flügelzellenpumpe
EP0323834A2 (fr) Pompe sans étanchéite
EP0254721B1 (fr) Pompe a aubes
WO2004109117A1 (fr) Pompe centrifuge multi-etagee
EP1577556A2 (fr) Pompe à palettes
EP0384974B1 (fr) Machine hydrostatique
DE735957C (de) Zweistufige Kreiselpumpe, insbesondere Kondensatpumpe
WO1995004221A1 (fr) Pompe a vide a palette a deux etages
EP0622525A1 (fr) Eléments de structure avec un interstice radial
DE3303856C2 (de) Rotationszellenpumpe
DE112021000460T5 (de) Lager und Turbolader
DE1528717B2 (de) Vorrichtung zum ausgleich des axialschubes bei mehrstufigen kreiselpumpen
EP0369155B1 (fr) Pompe d'injection de combustible
EP0301309B1 (fr) Machine à pistons axiaux differentiels
DE19849327B4 (de) Lageranordnung
EP0069859B1 (fr) Dispositif à compresseur
DE3729319C2 (de) Spiralverdichter
DE2914282A1 (de) Verstellbare fluegelzellenpumpe

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

17P Request for examination filed

Effective date: 20011031

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20030730

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030730

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030730

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030730

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030730

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: GERMAN

REF Corresponds to:

Ref document number: 50003122

Country of ref document: DE

Date of ref document: 20030904

Kind code of ref document: P

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

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20031030

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20031030

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20031030

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

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20031110

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20031111

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

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20031230

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

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

Ref country code: AT

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

Effective date: 20040525

Ref country code: LU

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

Effective date: 20040525

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

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

Effective date: 20040531

Ref country code: MC

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

Effective date: 20040531

Ref country code: BE

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

Effective date: 20040531

Ref country code: LI

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

Effective date: 20040531

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

Effective date: 20040504

BERE Be: lapsed

Owner name: *KSB A.G.

Effective date: 20040531

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 16

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

Ref country code: FR

Payment date: 20150518

Year of fee payment: 16

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20170131

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: 20160531

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 50003122

Country of ref document: DE

Owner name: KSB SE & CO. KGAA, DE

Free format text: FORMER OWNER: KSB AG, 67227 FRANKENTHAL, DE

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

Ref country code: GB

Payment date: 20190524

Year of fee payment: 20

Ref country code: DE

Payment date: 20190705

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 50003122

Country of ref document: DE

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20200524

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 EXPIRATION OF PROTECTION

Effective date: 20200524