EP0473061A2 - Arbres à cames pour moteurs à combustion - Google Patents

Arbres à cames pour moteurs à combustion Download PDF

Info

Publication number
EP0473061A2
EP0473061A2 EP91114051A EP91114051A EP0473061A2 EP 0473061 A2 EP0473061 A2 EP 0473061A2 EP 91114051 A EP91114051 A EP 91114051A EP 91114051 A EP91114051 A EP 91114051A EP 0473061 A2 EP0473061 A2 EP 0473061A2
Authority
EP
European Patent Office
Prior art keywords
drive part
functional part
drive
functional
camshaft
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
EP91114051A
Other languages
German (de)
English (en)
Other versions
EP0473061B1 (fr
EP0473061A3 (en
Inventor
Kurt Wizemann
Peter Dr.-Ing. Peppler
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.)
MAHLE-J WIZEMANN GmbH and Co KG
Original Assignee
Mahle-J Wizemann & Co KG GmbH
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 Mahle-J Wizemann & Co KG GmbH filed Critical Mahle-J Wizemann & Co KG GmbH
Publication of EP0473061A2 publication Critical patent/EP0473061A2/fr
Publication of EP0473061A3 publication Critical patent/EP0473061A3/de
Application granted granted Critical
Publication of EP0473061B1 publication Critical patent/EP0473061B1/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

Definitions

  • the invention relates to a camshaft for internal combustion engines with a functional part having functional elements and a drive part held on the functional part.
  • the invention further relates to a method for producing a camshaft for internal combustion engines from a functional part having functional elements and a drive part held on the functional part.
  • the entire shaft together with the drive part is cast in one piece. Due to the cast-technical manufacture of the drive part in one piece with the functional part, the geometrical shape of the drive part cannot be chosen freely, but is subject to the restrictions that are customary in a casting process. In addition, the drive part can not be processed in any way and thus the possibility of forming the drive part in the desired shapes is limited by the processing.
  • the invention is therefore based on the object of improving a camshaft of the generic type and a manufacturing method for such a shaft in such a way that the drive part can be produced with any desired geometric shapes and / or more cost-effectively.
  • the solution according to the invention has the great advantage that the drive part can be manufactured separately from the functional part in any shape by appropriate shaping processing by its manufacture and the final shaft is then produced by welding to the functional part. This also eliminates considerations of the shape of the drive part due to the fact that this - as is known from the prior art - is to be cast in one piece with the functional part.
  • the choice of material is free with the solution according to the invention.
  • the solution according to the invention also offers the advantage of producing the functional part according to different production process steps than the drive part and welding the two to one another according to these different process steps and only carrying out the last machining steps on the entire shaft.
  • the functional part and the drive part can be designed essentially without considering the other part.
  • the welding of the drive part to the functional part can basically be done in a variety of ways. For example, laser welding or electron beam welding is possible.
  • the drive part is connected to the functional part by a friction weld, since then the alignment of the drive part to the functional part and the total length of the two can already be defined in a defined manner by the friction welding process and misalignments between them can thus be avoided.
  • the drive part is also possible for the drive part to be joined to the functional part by means of an arc weld with a circumferential arc.
  • Arc welding with a circumferential arc is also a welding technique, which avoids misalignments, for example due to uneven heating and asymmetrical shrinking of the drive part and functional part, in that the circumferential arc results in a very uniform welding.
  • the drive part comprises a drive flange.
  • the drive flange is designed as a drive wheel, which is easily possible in terms of machining in the shaft constructed according to the invention.
  • the drive part comprises a connecting piece with which this can be welded to the functional part.
  • the drive part has an axially penetrating central recess, which preferably penetrates into the drive part from the side of the drive flange or the drive wheel.
  • the central recess in such a way that it has an internal form-locking element which can be fixed inexpensively and very precisely by broaching instead of bumping.
  • the drive part has a receptacle for an axial bearing for the shaft.
  • This receptacle can be produced in a particularly cost-effective manner on the drive part by allowing the drive part to be shaped independently of the functional part.
  • the receptacle is preferably designed such that it has an annular surface and in particular also a cylindrical surface on which the axial bearing is supported.
  • the drive part can be produced independently of the functional part, the possibility is created in the solution according to the invention that the drive part is made of steel.
  • the drive part is made of structural steel.
  • the production of the drive part from temperable steel or case hardening steel or nitriding steel is particularly advantageous. With such steels, the component properties of parts of the drive part can be optimized in a simple manner, regardless of the functional part, since joining only takes place after such treatments, in particular heat treatments.
  • the drive part is made from gray cast iron.
  • a gray cast iron with spheroidal graphite is preferably used. It would be conceivable to design the drive part as remelt-hardened spheroidal graphite.
  • this gray cast iron is cast iron that is free of shell casting.
  • an alternative of the solution according to the invention provides that the functional part is cast.
  • An embodiment is particularly preferred in which the functional part is made of gray cast iron.
  • This gray cast iron is advantageously a gray cast iron with spheroidal graphite.
  • gray cast iron with lamellar graphite, preferably with fine lamellar graphite and particularly preferably with D-graphite.
  • the functional part is transformation hardened or in particular remelt hardened.
  • the functional part As an alternative to producing the functional part as a remelt-hardened part, it is also favorable if the functional part is made of chilled cast iron.
  • An alternative to a cast functional part is one made of steel. This offers advantages in terms of production technology, since steel can be machined to shape using automatable processes, in particular machining processes.
  • the functional part can be designed as a single part or as a part composed of several elements.
  • Structural steel is preferably used as the steel.
  • this structural steel in particular its wear resistance, can be improved by tempering or the use of case hardening steel or nitriding steel.
  • the shaft according to the invention is produced by friction welding between the drive part and the functional part, there is the possibility of butt welding these two together as a full cross section.
  • the functional part has a hollow end facing the drive part, in which case the drive part is also preferably provided with the central recess, so that in each case annular surfaces are welded to one another.
  • the functional part has a blind hole facing the drive part.
  • the functional part has a hollow end facing away from the drive part, or it is also possible with extreme weight savings that the functional part has a recess which penetrates it in the axial direction.
  • the shaft is a camshaft and the functional part is a cam part thereof, the functional elements then being formed by the cams.
  • the drive part is connected to the functional part by a friction weld.
  • the drive part In the manufacture of the drive part, it is expedient if it is pre-machined before welding.
  • the drive part is manufactured from a blank by forming (forging or extrusion) and then additionally pre-processed.
  • the preprocessing includes preprocessing of receiving surfaces for the welding, so that the latter can take place with a defined alignment of the drive part to the functional part.
  • a cylinder surface and an end face surface are preferably pre-machined on the drive part, which together allow a clear alignment of the drive part.
  • the surfaces are pre-machined to an intermediate dimension so that these surfaces undergo a revision to the final dimension during the finishing process.
  • Machining pre-machining of the drive part is advantageous, with the possibility being given in particular of pre-machining the drive part to give shape on both sides.
  • the method according to the invention offers the great advantage that the central recess which axially penetrates the drive part is machined by broaching before welding, in particular considering the machining of an internal form-locking element .
  • a preferred exemplary embodiment of the method according to the invention provides that the drive part is finished to give shape after welding, since the shaft according to the invention as a whole can then be held in corresponding receptacles for finishing.
  • the drive part may be machined at least partially to give shape before welding.
  • the functional part is finished by a receptacle on the finished drive part, for example between tips.
  • the procedure is preferably such that the drive part is finished after welding by an additional mounting of the shaft on the functional part, for example between tips.
  • a preferred procedure provides for the functional part to be machined after being attached to the drive part, this machining being in particular a finishing process in which at least the functional part is preferably machined, for example finished.
  • These receiving surfaces are in particular cylindrical surfaces that are pre-machined to a predetermined size.
  • These cylindrical surfaces either comprise a specially provided clamping surface on the functional part and / or a later bearing surface on the functional part, in which case the bearing surface is preferably pre-machined to an intermediate dimension.
  • the functional part pre-machined, for example, pre-ground, to a large extent by machining, before it is attached to the drive part.
  • weld connection is machined in order to avoid notch effects and to improve the component strength, for example in order to remove a weld bead.
  • a first exemplary embodiment of a shaft according to the invention designed as a camshaft, comprises a cam part, designated as a whole as 10, on which cams 12 are integrally formed.
  • This cam part is preferably made of nodular gray cast iron in the form of chilled cast iron.
  • a drive part designated as a whole by 16 is held on the cam part 10 by a welded connection 14 and has a drive flange 18 to which a drive wheel 20 can be fastened. From this drive flange extends in the direction of the cam part a connection piece designated as a whole with 22, which is molded directly onto the drive flange 18 and extends to the welded connection 14.
  • This connector comprises a receptacle, designated as a whole by 24, for an axial bearing of the camshaft, which has a cylindrical surface 26 and two annular surfaces 28 and 30 which are opposite one another and delimit the cylindrical surface 26.
  • the drive part 16 as shown in FIG. 2, comprises a central recess 32, which extends coaxially to an axis 34 of the drive part 16, from the side of the drive flange 18 to the welded connection 14 the recess 32 is provided with a toothing 36 serving as an internal positive locking element, into which, for example, additional units for the camshaft, preferably a cam adjustment with counter positive locking elements, can be inserted.
  • the recess 32 is followed by an end-side recess 38 of the cam part, which extends coaxially with an axis of rotation 40 into a front end of the cam part 10, designated as a whole as 42, to a bottom 44 which closes the end-side recess 38.
  • the end recess 38 preferably has the same diameter as the recess 32.
  • the drive part 16 and the cam part 10 are aligned coaxially with one another so that the axes 34 and 40 coincide.
  • the drive part 16 is in turn preferably made of tempered structural steel and welded to the cam part 10 by friction welding, the drive part 16 and the cam part being butted towards one another End faces 40 and 50 are pressed against one another and welded, and a weld bead 46, which surrounds the weld connection 14, is produced.
  • this is provided with a clamping surface 52 which is close to the end face 50 and which is machined to a clamping diameter before the friction welding.
  • the cam part 10 also has bearing surfaces 54, a bearing surface, for example the bearing surface 54a, also being pre-machined to an intermediate diameter in order to obtain an additional surface for tensioning the cam part 10 for friction welding.
  • the clamping surface 52 and the bearing surface 54a are machined by receiving the cam part 10 between tips at the front end 42 and a rear end 56.
  • the drive part 16 is pre-machined to an intermediate dimension in the area of its drive flange 18 and an end face 58 thereof, so that the drive part 16 for friction welding can be received by means of the end face 58 and the drive flange 18.
  • the cam part 10 is produced from unalloyed spheroidal graphite cast iron with a pearlitic matrix, the spheroidal graphite cast iron having the following composition: C 2.90 - 3.90% Si 1.20 - 2.60% Mn 0.10 - 1.20% P 0.04 - 0.10% S 0.005 - 0.015% Cr 0.05 - 0.50% Cu 0.25 - 1.00%, and wherein the carbide-stabilizing trace elements, such as bismuth, tin, selenium, tellurium, antimony, molybdenum, vanadium and titanium, have a total concentration of more than 0.15%.
  • the carbide-stabilizing trace elements such as bismuth, tin, selenium, tellurium, antimony, molybdenum, vanadium and titanium, have a total concentration of more than 0.15%.
  • a further advantageous embodiment of a structure according to the invention comprises alloyed or unalloyed cast iron with a ferritic-pearlitic or purely pearlitic matrix, preferably alloyed with Mo and Ni, in order to provide the functional part with a bainitic matrix by means of a suitable heat treatment before the friction welding.
  • cam part 10 is produced from spheroidal graphite cast iron with a pearlitic matrix
  • the spherical graphite cast iron having the following composition: C 3.60 - 3.90% Si 1.90 - 2.60% Mn 0.10 - 0.50% P 0.04 - 0.10% S 0.005 - 0.015% Cr 0.05 - 0.15% Cu 0.25 - 0.50%, and wherein the carbide-stabilizing trace elements such as bismuth, tin, selenium, tellurium, antimony, molybdenum, vanadium and titanium have a total concentration of more than 0.15%.
  • FIG. 3 insofar as it has the same parts as the first exemplary embodiment, the same reference numerals are used, so that reference can be made to the statements relating to the first exemplary embodiment in this regard.
  • a drive wheel 20 is formed directly on the connecting piece 22, so that the drive part 16 itself has the drive wheel 20 directly.
  • Both exemplary embodiments are preferably produced in such a way that the cam part 10 is cast and the drive part 16 is pre-machined by machining. This pre-machined drive part 16 and the cast cam part 10 are then connected to one another by the friction welding, the weld bead 46 being formed.
  • the cam part in particular the bearing surfaces and then the cams, is first machined by taking up between tips and using the usual known grinding methods, so that the cam part 10 is in its final ground form.
  • the final machining of the drive part 16 is carried out by overturning or grinding, in particular the axial bearing thereof, so that finally the camshaft is in the finished state, in which all dimensions have the same tolerances as in one from one Piece of cast and machined known camshaft.
  • An embodiment of a camshaft according to the invention is produced as follows: After the production of the cam part 10, for example as a hard shell casting, it is cut to length and pre-machined at the end 56 and provided with an auxiliary center at the end 42. Subsequently, the cam part is picked up between tips and pre-machined to produce the clamping surface 52 to a defined dimension and pre-machined the bearing surface 54 a to an intermediate diameter that is larger than the later diameter of the bearing surface 54. This pre-machining of the clamping surface and the Bearing surface 54a by grinding.
  • the end 42 is machined to a defined length and a desired diameter of the bore 38.
  • the drive part 16 is also pre-machined in the region of the flange 18 and its end face 58, both being pre-machined to an intermediate dimension.
  • the bore 32 and the internal toothing 36 are machined during the pre-machining of the drive part 16.
  • the drive wheel 20 is also machined before the friction welding.
  • the drive part 16 is clamped in the area of the axial bearing 24 for the purpose of friction welding.
  • the drive part 16 is received and welded in the area of the drive flange 18 and the end face 58 as a contact surface and the cam part 10 on the clamping surface 52 and the bearing surface 54a.
  • the camshaft now present as a finished part, is received at the rear end 56 and the drive part 16 in the previously produced centers between tips.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
EP91114051A 1990-08-25 1991-08-22 Arbres à cames pour moteurs à combustion Expired - Lifetime EP0473061B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4026980 1990-08-25
DE4026980 1990-08-25
DE4029026A DE4029026A1 (de) 1990-08-25 1990-09-13 Welle fuer verbrennungsmotoren
DE4029026 1990-09-13

Publications (3)

Publication Number Publication Date
EP0473061A2 true EP0473061A2 (fr) 1992-03-04
EP0473061A3 EP0473061A3 (en) 1992-05-27
EP0473061B1 EP0473061B1 (fr) 1995-11-08

Family

ID=25896256

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91114051A Expired - Lifetime EP0473061B1 (fr) 1990-08-25 1991-08-22 Arbres à cames pour moteurs à combustion

Country Status (3)

Country Link
EP (1) EP0473061B1 (fr)
DE (2) DE4029026A1 (fr)
ES (1) ES1019908Y (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2259468A (en) * 1991-09-14 1993-03-17 Lucas Ind Plc Making cam ring
WO1997009148A1 (fr) * 1995-09-07 1997-03-13 Volvo Wheel Loaders Ab Arbre soude par friction
US6305242B1 (en) 1998-09-04 2001-10-23 Cummins Engine Company Ltd. Camshaft alignment
EP1577047A1 (fr) * 2004-03-16 2005-09-21 Renault s.a.s. Embout d'entrainement d'arbre à came, arbre à cames comportant un tel embout, et procédé d'assemblage de celui-ci
EP2093421A1 (fr) 2008-02-22 2009-08-26 Robert Bosch GmbH Pompe haute pression pour fournir du carburant à un système d'injection de carburant
EP2107244A1 (fr) * 2008-04-04 2009-10-07 Robert Bosch Gmbh Dispositif de pompage pour fournir du carburant haute pression à un système d'injection de carburant

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4201251A1 (de) * 1992-01-18 1993-07-22 Man Nutzfahrzeuge Ag Zahnradgetriebene nockenwelle
WO1993025808A1 (fr) * 1992-06-11 1993-12-23 Generac Corporation Moteur a combustion interne pour groupe d'alimentation portable
DE4437396C2 (de) * 1994-10-19 1998-01-22 Jansen Manfred Dr Ing Gebaute Nockenwelle
DE10144979C5 (de) * 2001-09-12 2011-12-15 Koki Technik Transmission Systems Gmbh Schaltgetriebewellen und Verfahren zu ihrer Herstellung
DE10314970A1 (de) * 2003-04-02 2004-10-28 Daimlerchrysler Ag Kurbelwelle und Verfahren zu ihrer Herstellung
DE102005026505A1 (de) * 2005-06-09 2006-12-14 Schaeffler Kg Verfahren zum Verbinden von zwei Bauelementen mittels Reibschweißen sowie Schweißverbindung
DE102016217024A1 (de) * 2016-09-07 2018-03-08 Mahle International Gmbh Herstellungsverfahren einer Nockenwelle

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1922488A1 (de) * 1969-05-02 1970-11-05 Porsche Kg Zusammengesetzte Kurbelwelle fuer mehrzylindrige Kolbenmaschinen,insbesondere Brennkraftmaschinen
GB1295988A (fr) * 1970-05-15 1972-11-08
US3999277A (en) * 1974-07-02 1976-12-28 Hiroshi Hamada Method of manufacturing assembly-type camshaft
US4445265A (en) * 1980-12-12 1984-05-01 Smith International, Inc. Shrink grip drill pipe fabrication method
DE3346056A1 (de) * 1983-01-17 1984-07-19 General Motors Corp., Detroit, Mich. Verfahren zum herstellen einer zusammengesetzten nockenwelle
DE3644577C1 (de) * 1986-12-27 1988-05-11 Hundhausen Walter Gmbh Verfahren zum Reibschweissen
DE3705114A1 (de) * 1987-02-18 1988-09-22 Audi Ag Nockenwelle aus gusseisen fuer brennkraftmaschinen
DE3800914A1 (de) * 1988-01-14 1989-08-03 Emitec Emissionstechnologie Zusammengesetzte welle mit integrierten antriebselementen
DE3822329A1 (de) * 1988-07-01 1990-01-04 Brueninghaus Hydraulik Gmbh Verfahren zum herstellen einer triebwelle fuer eine hydrostatische maschine sowie eine solche triebwelle
DE3836328A1 (de) * 1988-10-25 1990-04-26 Emitec Emissionstechnologie Verfahren zur herstellung von einzelnocken aus gusswerkstoff

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2259468A (en) * 1991-09-14 1993-03-17 Lucas Ind Plc Making cam ring
WO1997009148A1 (fr) * 1995-09-07 1997-03-13 Volvo Wheel Loaders Ab Arbre soude par friction
US6036077A (en) * 1995-09-07 2000-03-14 Volvo Wheel Loaders Ab Friction welded shaft
US6305242B1 (en) 1998-09-04 2001-10-23 Cummins Engine Company Ltd. Camshaft alignment
EP1577047A1 (fr) * 2004-03-16 2005-09-21 Renault s.a.s. Embout d'entrainement d'arbre à came, arbre à cames comportant un tel embout, et procédé d'assemblage de celui-ci
FR2867712A1 (fr) * 2004-03-16 2005-09-23 Renault Sas Embout d'entrainement d'arbre a cames, arbres a cames comportant un tel embout, et procede d'assemblage de celui-ci.
EP2093421A1 (fr) 2008-02-22 2009-08-26 Robert Bosch GmbH Pompe haute pression pour fournir du carburant à un système d'injection de carburant
EP2107244A1 (fr) * 2008-04-04 2009-10-07 Robert Bosch Gmbh Dispositif de pompage pour fournir du carburant haute pression à un système d'injection de carburant

Also Published As

Publication number Publication date
EP0473061B1 (fr) 1995-11-08
DE4029026A1 (de) 1992-03-05
DE59106853D1 (de) 1995-12-14
ES1019908Y (es) 1993-02-16
EP0473061A3 (en) 1992-05-27
ES1019908U (es) 1992-05-16

Similar Documents

Publication Publication Date Title
DE19930444C2 (de) Stabilisatoranordnung für ein Kraftfahrzeug
EP0292795B1 (fr) Arbre creux comportant des éléments d'entraînement fixés, par élargissement de l'arbre et des matériaux de propriétés différentes dans une direction axiale
EP0473061B1 (fr) Arbres à cames pour moteurs à combustion
DE102004009074B3 (de) Gebauter Mehrfachnocken
DE112005000616T5 (de) Antriebsritzel und Verfahren zum Herstellen eines Antriebsritzels
DE10065737B4 (de) Verfahren zum Herstellen eines Kegelrads
DE7737438U1 (de) Zahnrad
DE2261446A1 (de) Mit zaehnen versehenes kraftuebertragendes bauteil und verfahren zu seiner herstellung
DE602004011733T2 (de) Pleuel mit einem geteilten Pleuelstangenkopf und entsprechendes Herstellungsverfahren
DE19939851A1 (de) Zweiteilige, reibungsgeschweißte Kraftfahrzeug-Achswelle
DE19725446A1 (de) Verfahren zum Herstellen einer Kettenradanordnung mit Phasenversatz durch Kondensatorenladungsschweißen
EP1502011B1 (fr) Came monobloc, son procede de fabrication, et assemblage d'un arbre de commande ou arbre a came
EP1624229B1 (fr) Boîte d' engrenage différentiel
DE19617831A1 (de) Verfahren zur Herstellung von Zahnrädern
DE10006448B4 (de) Stufenlos verstellbares Toroidgetriebe und Verfahren zur Herstellung eines Drehzapfens zum Einsatz in diesem
DE602004009244T2 (de) Antriebswelle
DE102005029539A1 (de) Achsschenkel für ein Kraftfahrzeug
EP0745178A1 (fr) Cames multiples
EP1219865A1 (fr) Assemblage de différentiel et procédé correspondant
DE4307562B4 (de) Verfahren zur Herstellung auf einer Steuerwelle durch thermisches Schrumpfen positionierbaren Sinter-Steuernockens
DE2526656A1 (de) Ventilstoessel
DE3728142C2 (fr)
DE102022129857A1 (de) Verbindungseinheit zum Verbinden einer Lenkvorrichtung mit einem Rad eines Fahrzeugs, Lenkvorrichtung und Verfahren zum Herstellen einer Verbindungseinheit
DE19511881B4 (de) Verfahren zum Schleifen der Außenkontur eines Werkstückes
DE10227816A1 (de) Verfahren zur Herstellung eines Kreuzgelenks für ein Universalgelenk

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

Kind code of ref document: A2

Designated state(s): DE ES FR GB IT SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE ES FR GB IT SE

17P Request for examination filed

Effective date: 19921121

17Q First examination report despatched

Effective date: 19930512

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: MAHLE-J. WIZEMANN GMBH & CO. KG

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT 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 PRE;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.SCRIBED TIME-LIMIT

Effective date: 19951108

Ref country code: FR

Effective date: 19951108

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19951108

Ref country code: GB

Effective date: 19951108

REF Corresponds to:

Ref document number: 59106853

Country of ref document: DE

Date of ref document: 19951214

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

Ref country code: SE

Effective date: 19960208

EN Fr: translation not filed
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 19951108

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: DE

Payment date: 20020905

Year of fee payment: 12

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: 20040302