EP0535031B1 - Dispositif pour la distribution d'huile dans un arbre a cames - Google Patents

Dispositif pour la distribution d'huile dans un arbre a cames Download PDF

Info

Publication number
EP0535031B1
EP0535031B1 EP91910773A EP91910773A EP0535031B1 EP 0535031 B1 EP0535031 B1 EP 0535031B1 EP 91910773 A EP91910773 A EP 91910773A EP 91910773 A EP91910773 A EP 91910773A EP 0535031 B1 EP0535031 B1 EP 0535031B1
Authority
EP
European Patent Office
Prior art keywords
oil
camshaft
insert
duct
cavity
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
EP91910773A
Other languages
German (de)
English (en)
Other versions
EP0535031A1 (fr
Inventor
Herbert Ampferer
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche 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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of EP0535031A1 publication Critical patent/EP0535031A1/fr
Application granted granted Critical
Publication of EP0535031B1 publication Critical patent/EP0535031B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/02—Arrangements of lubricant conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/10—Lubrication of valve gear or auxiliaries
    • F01M9/101—Lubrication of valve gear or auxiliaries of cam surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/10—Lubrication of valve gear or auxiliaries
    • F01M9/102—Lubrication of valve gear or auxiliaries of camshaft bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L2001/0475—Hollow camshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2810/00—Arrangements solving specific problems in relation with valve gears
    • F01L2810/02—Lubrication
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams

Definitions

  • the invention relates to an internal combustion engine according to the preamble of claim 1, as known for example from FR-A-54 24 94.
  • one and the same oil flow within the oil channel, which runs centrally in an insert arranged in the camshaft, can be routed to distant lubrication points and within the cavity, which exists between the insert and the camshaft, to nearby lubrication points.
  • the invention has for its object to provide a device for distributing oil in a camshaft, which makes it possible to conduct several oil flows independently of one another within the camshaft.
  • This device for distributing oil enables the targeted guidance of a first and a second oil flow within a camshaft.
  • the oil flows are completely separated from one another and can therefore have different pressures, mass flows, flow directions, etc.
  • the oil channel arranged centrally in the insert is connected to an oil circuit via a first, radially running channel and leads a first oil flow, for example from one end of the camshaft to one or more bearing points.
  • the oil channel is coaxially enclosed at least in sections by an annular cavity which is located between the coaxially enclosed annular cavity which extends between the insert and the camshaft.
  • a second oil flow is conducted in this cavity and is connected to the oil circuit via a second channel.
  • the insert has a first sealing section which axially delimits the cavity on one side and separates the oil flows from one another.
  • the device is advantageously suitable for various applications.
  • two oil flows can be fed into the oil channel or the cavity from one end of the camshaft in order to ensure the lubrication of bearing points via the first channel, while hydraulically activatable and deactivatable cams are actuated with the aid of the second channel.
  • the device can be used to actuate a hydraulically actuated phase converter.
  • the phase converter changes the relative rotational position between the intake and exhaust camshafts of an internal combustion engine by axially displacing an actuating piston in two end positions.
  • a pressure oil flow is fed through one of the channels into the camshaft, while the unpressurized oil volume displaced by the control piston is discharged via the second channel.
  • the insert is lightweight, cost-saving and tolerance-insensitive to manufacture from plastic and is pressed into the camshaft with a slight oversize. To avoid transverse vibrations of the insert in the camshaft, it is provided in the region of the cavity with ribs arranged between the oil channel and the inner surface of the camshaft, which divides the cavity into several oil grooves.
  • the first sealing section consists of several radially acting sealing elements, which effectively separate the oil flows from one another and prevent vibrations of the insert in this area.
  • a hollow, built-up camshaft 1 of an internal combustion engine, not shown, has cams 2 for actuating lift valves, also not shown, and is held in several bearing points 3.
  • an axially extending insert 4 is provided within the camshaft 1, in which a central oil passage 5 is arranged, which extends from an open end 6 of the camshaft 1 to close to the opposite end of the section E. From the end 6, the oil channel 5 is coaxially surrounded along a section H by a cavity 7 which is formed between the oil channel 5 and the inner surface 8 of the camshaft 1.
  • the insert 4 has a first sealing section 9, which consists of a plurality of axially spaced, radially acting sealing elements 10.
  • the oil channel 5 is connected via a radial first channel 15 to a first bearing 3, which is connected to an oil circuit, not shown, of the internal combustion engine.
  • the cavity 7 is connected to the sealing section 9 via a radially extending, second channel 16 with a second bearing 3a, which is also connected to the oil circuit.
  • the insert 4 has a cover 18 which closes the oil channel 5 and which together with the adjoining one Part of the insert 4 forms a second sealing section 19.
  • the sealing sections 9 and 19 are designed adjacent to the first channel 15 such that an annular gap 20 coaxially surrounding the oil channel 5 remains between them and the inner surface 8.
  • Radially protruding ribs 21 are arranged along the section H from the oil channel 5 and support the insert 4 in the region of the cavity 7 against the surface 8 and thus avoid vibrations of the insert 4 in the camshaft 1. 2, the ribs 21 subdivide the cavity 7 into axially extending oil grooves 22.
  • the first sealing section 9 and the cavity 7 are designed adjacent to the second channel 16 in such a way that between them and the inner surface 8 there is another, coaxially enclosing the oil channel 5 Annular gap 20 remains.
  • a bush 23 is pressed in oil-tightly, which receives the oil channel 5 and delimits the cavity 7 so that the oil flowing in it from a bore 24 of the camshaft 1 according to FIG Phase converter 25 arrives.
  • the sealing elements 10 of the sealing section 9 are designed in the manner of a truncated cone in accordance with FIG. 1, but can also be shaped like a bead in accordance with a second embodiment (FIG. 3) from cylindrical rings 30 or in accordance with a third embodiment (FIG. 4).
  • the sealing element 10 adjacent to the second channel 16 is cylindrical.
  • the second sealing section 19 and the part of the oil channel 5 supported in the bush 23 have circumferential sealing lips 31.
  • the insert 4 can be produced in a simple manner from a filled plastic, for example PA66 GF35, the cover 18 being applied by means of ultrasonic welding. During assembly, the complete insert 4 is pushed into the camshaft 1 in such a way that the oil channel 5 is flush with the camshaft 1 at the end 6, then the bushing 23 is pressed in.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

Un dispositif pour la distribution d'huile dans un arbre à cames d'un moteur à combustion interne comporte un insert cylindrique (4) s'étendant axialement dans l'arbre à cames (1) et lequel conduit deux flux d'huile séparés dans l'arbre à cames (1). L'insert (4) présente un canal d'huile (5) disposé de manière centrale pour un flux d'huile, ainsi qu'un creux (7) ménagé entre l'insert (4) et l'arbre à cames (1) et constituant une partie du dispositif pour un autre flux d'huile. Les deux flux d'huile sont amenés à travers des canaux radiaux (15, 16) à l'arbre, ou bien en sont évacués.

Claims (3)

  1. Moteur a combustion interne avec un arbre a cames qui comporte des points d'appui raccordés à un circuit d'huile et une garniture cylindrique (4), s'étendant axialement a l'intérieur de l'arbre à cames, laquelle garniture délimite une cavité entre l'arbre à cames et la garniture (4) et comporte un canal d'huile (5) central, qui guide un premier courant d'huile et qui communique avec le circuit d'huile par un premier canal (15) dans un premier point d'appui (3), dans lequel la garniture (4) est entourée axialement, au moins en partie, par la cavité (7) guidant un second courant d'huile, laquelle cavité est raccordée par un second canal (16) au circuit d'huile, et dans lequel la garniture (4) comporte, entre le premier canal (15) et le second canal (16), une partie d'étanchéité (9) délimitant axialement la cavité (7), agissant radialement, caractérisé en ce que la partie d'étanchéité est pourvue de plusieurs éléments d'étanchéité (10) espacés axialement, la garniture (4) comportant sur chacun des deux côtés de la partie d'étanchéité (9), une fente annulaire (20) entourant coaxialement le canal d'huile (5), guidant le premier courant d'huile, à proximité des canaux (15, 16) et en ce que le second canal (16) communique avec le circuit d'huile, par un second point d'appui (3a).
  2. Moteur à combustion interne selon la revendication 1, caractérisé en ce que la garniture (4) comporte, dans la zone de la cavité (7), des nervures (21) faisant saillie radialement, soutenant la graniture (4) dans l'arbre à cames (1).
  3. Moteur à combustion interne selon la revendication 1, caractérisé en ce que la garniture (4) comporte, à proximité du premier canal (15), une seconde partie d'étanchéité (19), agissant radialement.
EP91910773A 1990-06-21 1991-06-15 Dispositif pour la distribution d'huile dans un arbre a cames Expired - Lifetime EP0535031B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4019766 1990-06-21
DE4019766A DE4019766A1 (de) 1990-06-21 1990-06-21 Vorrichtung zur verteilung von oel in einer nockenwelle
PCT/EP1991/001112 WO1991019887A1 (fr) 1990-06-21 1991-06-15 Dispositif pour la distribution d'huile dans un arbre a cames

Publications (2)

Publication Number Publication Date
EP0535031A1 EP0535031A1 (fr) 1993-04-07
EP0535031B1 true EP0535031B1 (fr) 1994-08-17

Family

ID=6408790

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91910773A Expired - Lifetime EP0535031B1 (fr) 1990-06-21 1991-06-15 Dispositif pour la distribution d'huile dans un arbre a cames

Country Status (5)

Country Link
US (1) US5273007A (fr)
EP (1) EP0535031B1 (fr)
JP (1) JPH05507989A (fr)
DE (2) DE4019766A1 (fr)
WO (1) WO1991019887A1 (fr)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5325826A (en) * 1993-11-04 1994-07-05 Ford Motor Company Journal bearing oil diverter
DE4433277B4 (de) * 1994-09-19 2005-08-04 Deutz Ag Ölsystem einer Brennkraftmaschine
DE4435659A1 (de) * 1994-10-05 1996-04-11 Bayerische Motoren Werke Ag Brennkraftmaschine mit nockenbetätigten, zumindest teilweise abschaltbaren Ladungswechsel-Ventilen
EP0826873B1 (fr) * 1996-08-24 2000-05-24 Volkswagen Aktiengesellschaft Dispositif de distribution de carburant pour un moteur à combustion
US5778841A (en) * 1997-02-26 1998-07-14 Cummins Engine Company, Inc. Camshaft for internal combustion engines
DE19757504B4 (de) * 1997-12-23 2005-03-31 Daimlerchrysler Ag Gebaute Nockenwelle für eine Brennkraftmaschine
JP4318770B2 (ja) * 1998-10-05 2009-08-26 本田技研工業株式会社 多気筒エンジンにおけるカムシャフトの潤滑構造
ATE331121T1 (de) * 1999-12-30 2006-07-15 Thyssenkrupp Presta Ag Welle als maschinenbauteil mit integrierten leitungen
KR20020082701A (ko) * 2001-04-25 2002-10-31 현대자동차주식회사 가변 밸브 타이밍 액츄에이터에 오일 공급 구조
DE10125498A1 (de) * 2001-05-23 2002-12-19 Salzgitter Antriebstechnik Gmb Nockenwelle und Verfahren zur Herstellung einer Nockenwelle
DE10160246C1 (de) * 2001-12-07 2003-04-17 Thyssen Krupp Automotive Ag Hohlwelle
US6742491B1 (en) 2002-12-17 2004-06-01 Tecumseh Products Company Engine lubrication system
DE10333850B4 (de) * 2003-07-24 2005-11-17 Muhr Und Bender Kg Gebaute Nockenwelle mit Nockenwellenversteller
DE10346446A1 (de) 2003-10-07 2005-05-12 Daimler Chrysler Ag Nockenwellenversteller für eine Brennkraftmaschine mit Hydraulikmittelführungen
DE102006013829A1 (de) * 2006-03-23 2007-09-27 Mahle International Gmbh Verstellbare Nockenwelle
DE102006038680B4 (de) * 2006-08-17 2018-11-22 Bayerische Motoren Werke Aktiengesellschaft Schmiereinrichtung für einen Ventiltrieb einer Brennkraftmaschine
US7455040B2 (en) * 2006-10-10 2008-11-25 Delphi Technologies, Inc. Hydraulic circuit for switchable cam followers
FR2925573A3 (fr) * 2007-12-19 2009-06-26 Renault Sas Arbre a cames de moteur a combustion interne
DE102013011588A1 (de) 2013-07-10 2015-01-15 Daimler Ag Wellenvorrichtung für ein Kraftfahrzeug
DE102013223018B4 (de) 2013-11-12 2015-08-13 Bayerische Motoren Werke Aktiengesellschaft Antriebsaggregat, Verbrennungsmotor, Abstandshalter für eine Fluidleitungsanordnung und Werkzeugsatz zur Montage eines Abstandshalters
DE102014007591A1 (de) * 2014-05-26 2015-11-26 Thyssenkrupp Presta Teccenter Ag Nockenwelle mit Verschlussdeckel
JP2017120049A (ja) * 2015-12-28 2017-07-06 株式会社クボタ シリンダヘッド冷却構造
US9970476B2 (en) 2016-02-19 2018-05-15 GM Global Technology Operations LLC Crankshaft assembly with core plug and method of manufacturing a crankshaft assembly
CN108087493A (zh) * 2016-11-23 2018-05-29 通用汽车环球科技运作有限责任公司 复合材料交通工具轴组件
DE102021207293A1 (de) 2021-07-09 2023-01-12 Mahle International Gmbh Nockenwellenstopfen
DE102023106408A1 (de) 2023-03-14 2024-09-19 Thyssenkrupp Ag Nockenwelle und Verfahren zur Herstellung einer Nockenwelle

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE363862C (de) * 1922-11-14 Marc Birkigt Vorrichtung zur Verteilung von Schmieroel auf Kraftmaschinen mit innerer Verbrennung mittels sich drehender Wellen, bei welchen der OElzutritt in zwei Adern geteilt ist
FR542494A (fr) * 1920-10-21 1922-08-12 Perfectionnements apportés aux moyens pour distribuer du liquide, par l'intermédiaire d'arbres rotatifs, le long de ceux-ci, notamment aux moyens de ce genre comportés, pour leur graissage, par certains moteurs à explosion
JPS5537552A (en) * 1978-09-11 1980-03-15 Toyota Motor Corp Hollow cam shaft having oil pump configuration
JPS6073005A (ja) * 1983-09-28 1985-04-25 Nippon Piston Ring Co Ltd 潤滑油供給機能を有するカムシヤフト
JPS60151458A (ja) * 1984-01-20 1985-08-09 Nippon Piston Ring Co Ltd カムシヤフト
US4858574A (en) * 1986-12-26 1989-08-22 Honda Giken Kogyo Kabushiki Kaisha Hydraulic circuit for a valve operating timing control device for an internal combustion engine
US5201247A (en) * 1988-01-14 1993-04-13 Mannesmann Aktiengesellschaft Assembled shaft and process for production thereof
DE3803685A1 (de) * 1988-02-07 1989-08-17 Emitec Emissionstechnologie Nockenwelle
US5186129A (en) * 1992-03-30 1993-02-16 Ford Motor Company Intermittent oiling system for an internal combustion engine camshaft and valve train

Also Published As

Publication number Publication date
DE4019766C2 (fr) 1992-04-23
DE4019766A1 (de) 1992-01-09
EP0535031A1 (fr) 1993-04-07
WO1991019887A1 (fr) 1991-12-26
DE59102578D1 (de) 1994-09-22
US5273007A (en) 1993-12-28
JPH05507989A (ja) 1993-11-11

Similar Documents

Publication Publication Date Title
EP0535031B1 (fr) Dispositif pour la distribution d'huile dans un arbre a cames
EP1844216B1 (fr) Arbre a cames ajustable, en particulier pour moteurs a combustion interne de vehicules, pourvu d'un dispositif d'ajustement hydraulique
EP0469332B1 (fr) Procédé pour changer le calage des soupapes d'un moteur à combustion interne
DE19757504B4 (de) Gebaute Nockenwelle für eine Brennkraftmaschine
EP1963625B1 (fr) Arbre à cames
DE4024056C1 (fr)
WO2007025622A1 (fr) Piston pourvu d'un evidement radial peripherique place en dessous d'une rainure annulaire
EP1956222A1 (fr) Bloc d'arbre à cames et son procédé de montage
EP0206029A1 (fr) Palier aérostatique
EP2653672B1 (fr) Moteur à combustion interne
EP0745757A1 (fr) Arbre à cames rapportées, en particulier pour moteurs à combustion interne
EP1623747B1 (fr) Filtre annulaire pour des rainures annulaire
DE10232528A1 (de) Magnetventil mit Ölfilter für variable Nockenwellensteuerung
DE19618401C1 (de) Zylinderkopfanordnung einer Brennkraftmaschine
DE19958629B4 (de) Vorrichtung zum Verändern der Steuerzeiten einer Brennkraftmaschine
WO2004018843A2 (fr) Palier lisse pour arbre de turbocompresseur
AT402321B (de) Zylinderkopf für brennkraftmaschinen
DE2936068C2 (fr)
DE4314183A1 (de) Vorrichtung zum Schmieren der Nocken einer Nockenwelle
DE19747244A1 (de) Zylinderkopf
DE69206350T2 (de) Zylinderkopf für Brennkraftmaschine.
DE19621636C2 (de) Vorrichtung zum Schmieren der Nocken einer Nockenwelle
DE102010013928A1 (de) Rotoreinheit für einen Nockenwellenversteller sowie Nockenwellenverstellsystem
DE3401966A1 (de) Vorrichtung fuer die druckversorgung selbsteinstellbarer ventilstoessel eines verbrennungsmotors
DE9400898U1 (de) Rollenhebel an einem Gußwerkstoff

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: 19921111

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 19931228

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 59102578

Country of ref document: DE

Date of ref document: 19940922

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19940902

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

Ref country code: FR

Effective date: 19960229

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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

Ref country code: GB

Payment date: 19960625

Year of fee payment: 6

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

Ref country code: DE

Payment date: 19960708

Year of fee payment: 6

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: 19970615

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

Effective date: 19970615

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

Ref country code: DE

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

Effective date: 19980303

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 NON-PAYMENT OF DUE FEES

Effective date: 20050615