EP0016381A1 - Moteur à combustion interne à quatre temps à refroidissement par air, avec tiroir rotatif - Google Patents

Moteur à combustion interne à quatre temps à refroidissement par air, avec tiroir rotatif Download PDF

Info

Publication number
EP0016381A1
EP0016381A1 EP80101145A EP80101145A EP0016381A1 EP 0016381 A1 EP0016381 A1 EP 0016381A1 EP 80101145 A EP80101145 A EP 80101145A EP 80101145 A EP80101145 A EP 80101145A EP 0016381 A1 EP0016381 A1 EP 0016381A1
Authority
EP
European Patent Office
Prior art keywords
crankcase
cylinder
cylinder head
channel
air
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
EP80101145A
Other languages
German (de)
English (en)
Other versions
EP0016381B1 (fr
Inventor
Günther Dylla
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.)
Dylla Norbert
Original Assignee
Dylla Norbert
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 Dylla Norbert filed Critical Dylla Norbert
Priority to AT80101145T priority Critical patent/ATE3663T1/de
Publication of EP0016381A1 publication Critical patent/EP0016381A1/fr
Application granted granted Critical
Publication of EP0016381B1 publication Critical patent/EP0016381B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B15/00—Reciprocating-piston machines or engines with movable cylinders other than provided for in group F01B13/00
    • F01B15/007—Reciprocating-piston machines or engines with movable cylinders other than provided for in group F01B13/00 having spinning cylinders, i.e. the cylinders rotating about their longitudinal axis
    • 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
    • F01L7/00—Rotary or oscillatory slide valve-gear or valve arrangements
    • F01L7/02—Rotary or oscillatory slide valve-gear or valve arrangements with cylindrical, sleeve, or part-annularly shaped valves
    • F01L7/04—Rotary or oscillatory slide valve-gear or valve arrangements with cylindrical, sleeve, or part-annularly shaped valves surrounding working cylinder or piston
    • 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
    • F01L7/00—Rotary or oscillatory slide valve-gear or valve arrangements
    • F01L7/16—Sealing or packing arrangements specially therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/34—Ultra-small engines, e.g. for driving models
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four

Definitions

  • the invention relates to an air-cooled, rotary valve-controlled four-stroke internal combustion engine with a cylinder liner rotatably mounted about its axis in a bearing bore of the cylinder block, which has a fixedly connected to it, sealingly abutting the cylinder head, forming the rotary slide valve, and via a gear transmission from the crankshaft in Ratio 1: 2 is driven, the bottom having a passage opening and the cylinder head having at least one inlet and one outlet opening, all of which are arranged on the same diameter.
  • Known rotary valve-controlled four-stroke internal combustion engines of this type are used in practice primarily as Tiodell engines, that is to say for driving model aircraft, model ships and model cars. Up to a cubic capacity of about 6 cc, such rotary valve-controlled four-stroke internal combustion engines also work relatively well. With a larger displacement, however, cooling and lubrication is no longer sufficient with air-cooled engines.
  • the heat generated in the rotating cylinder liner must namely be transferred to the cylinder block via its outer wall and from there via cooling fins to the outside air. Some of the heat is also transferred from the bottom of the cylinder liner to the cylinder head.
  • this known water-cooled internal combustion engine is considerably more expensive than an air-cooled engine due to the water cooling.
  • a water pump, a cooler and a driven fan must also be provided for the cooling water.
  • additional units are also subject to wear and are therefore prone to repair and malfunction. They also increase the overall weight of the engine, what is particularly disadvantageous for model engines.
  • the invention has for its object to provide an air-cooled, rotary valve-controlled four-stroke internal combustion engine of the type mentioned, in which sufficient cooling and lubrication is ensured in a simple manner without essential additional units.
  • At least one first channel extending from the crankcase to the cylinder head is provided, which opens into a second channel on the cylinder head side and that otherwise All-round closed crankcase communicates with the outside air via an inlet channel and an automatically acting valve arrangement, which allows outside air to flow into the crankcase when the piston moves upwards from its lower dead center to its top dead center and closes the inlet channel when the piston moves downward, so that the inlet valve closes Crankcase intake air is displaced through the first and second channels.
  • the rotary valve-controlled four-stroke internal combustion engine achieves excellent cooling and significantly improved lubrication of the cylinder liner by very simple means that do not require any significant design effort. It is only necessary to provide one or expediently several channels acting as cooling air channels in the cylinder block adjacent to the outer wall of the cylinder liner and an outlet channel and the valve arrangement mentioned above in the cylinder block or cylinder head.
  • the piston moving up and down serves its upward movement draws cool outside air into the crankcase. When the piston moves downward, this can only be displaced by the cooling air channels and the outlet channel, since the valve arrangement closes the inlet channel when the piston moves downward.
  • the air flowing along the outer wall of the cylinder liner cools the cylinder liner, this cooling extending over a larger circumferential area of the cylinder liner, since the latter rotates past the cooling air channels.
  • the cooling air also pulls oil droplets out of the crankcase into the cooling air channel or channels. These oil droplets attach themselves to the outer wall of the cylinder liner and are also carried into the gap between the cylinder liner and the bearing bore when the cylinder liner rotates.
  • the cooling air channels also ensure excellent lubrication, in particular of the parts of the cylinder liner that are distant from the crankshaft.
  • a cylinder liner 3 is rotatable about its axis and can be displaced to a limited extent in the axial direction.
  • the upper end of the cylinder liner 3 is closed by a bottom 4 which is firmly connected to the cylinder liner.
  • This bottom 4 has an eccentrically arranged through bore 5.
  • the bottom 4 rests with a flat sealing surface 4a on the cylinder head 6 and is initially held against the cylinder head 6 with little force by springs, not shown, which act on the flange 7.
  • the cylinder head 6 has an inlet opening 8 and an invisible outlet opening, which is arranged on the same diameter, but which displaces the inlet opening 8 in the circumferential direction. Another opening, which is also arranged on the same diameter, serves to receive a glow plug.
  • the bottom 4 forms a rotary slide valve which interacts with the cylinder head 6.
  • crankcase 9 adjoins the cylinder block 2 at the bottom. Only to simplify the drawings, cylinder block 2 and crankcase 9 are shown in one piece in the exemplary embodiment shown, but in practice both parts are usually manufactured separately and screwed together during assembly.
  • the crankshaft 10 is mounted in the crankcase 9. It carries a pinion 11 which, via a first bevel gear 12, the bevel gear 13, which is fixedly connected to the cylinder liner 3,
  • a pinion 11 which, via a first bevel gear 12, the bevel gear 13, which is fixedly connected to the cylinder liner 3,
  • four, axially parallel grooves 14, which are open towards the outer wall 3a of the cylinder liner 3 and are used as cooling air channels and for the supply of lubricant, are provided in the wall of the bearing bore 1.
  • the grooves 14 extend from the crankcase 9 to approximately the cylinder head 6 over approximately the entire length of the cylinder liner 3.
  • the grooves 14 open into an annular channel 15 which is incorporated into the cylinder head-side end 2a of the cylinder block 2.
  • part of the annular channel 15 is formed by an annular shoulder 16 screwed into the sealing surface 4a on the circumference of the base 4.
  • This ring shoulder 16 has at the same time the effect that the sealing surface 4a lying against the cylinder head 6 is reduced and thus the friction between the two parts is reduced.
  • lubricant can also penetrate better to the remaining sealing surface 4a.
  • An outlet channel 17 provided in the cylinder head 6 opens into the ring channel 15. However, this outlet channel can optionally also be arranged at the end 2a of the cylinder block 2 on the cylinder head side.
  • a valve arrangement is also provided which controls the supply of outside air into the crankcase, which is otherwise closed on all sides, in a certain way.
  • this valve arrangement is formed by parts of the crankshaft and a housing part (connecting piece) 18 connected to the crankcase 9.
  • the crankshaft 10 has an axial bore 19 which is open towards the inside of the crankcase 9 and a radial bore 20 which is provided outside the actual crankcase in the region of the housing part 18.
  • the two bores 19 and 20 together form an inlet channel.
  • the housing part 18 surrounding the crankshaft 10 has one over a Part of the circumference of the crankshaft 10 extends ' with the radial bore 20 in a radial plane lying inlet opening 21.
  • This inlet opening 21 can extend approximately over half the circumference of the crankshaft 10.
  • the inlet opening 21 is arranged opposite the radial bore 20 such that the radial bore 20 moves in the region of the inlet opening 21 when the piston 22 moves upward from its lower to its upper dead center in the direction A, as shown in FIG. 1.
  • the radial bore 20 rotates in a region of the housing connector 18 which is not covered by the inlet opening 21. The radial bore 20 is thus closed by the nozzle 18 during the downward movement of the piston.
  • the heated exhaust air emerging from the outlet duct 17 can either be discharged into the open or can also be returned to the carburetor V via a connecting line 23.
  • the connecting line 23 prevents any oil droplets still present in the exhaust air from reaching the outside air. At the same time, however, it is also achieved that the oil droplets are supplied to the mixture via the carburetor V and cause additional lubrication between the piston 22 and the cylinder liner 3. So practically no oil is lost.
  • the connecting line 23 is expediently guided outside the cylinder head over a greater length, so that the connecting line 23 also serves as a heat exchanger and the exhaust air flowing through the connecting line 23 is cooled again by the outside air surrounding the connecting line 23.
  • FIGS. 5 and 6 show a further exemplary embodiment, the rotary slide valve-controlled four-stroke internal combustion engine functioning in the same way as the exemplary embodiment shown in FIGS. 1-4. Parts of the same function are therefore also designated with the same reference symbols, the above description being to be applied analogously.
  • a needle bearing consisting of a plurality of needles 24 is provided between the outer wall 3a of the cylinder liner 3 and the bearing bore 1 of the cylinder head 2.
  • the needles 24 are kept at a distance by cage rings 25.
  • the spaces 26 present between the individual needles 24 form the cooling air ducts in this exemplary embodiment.
  • the oil droplets entrained by the cooling air lubricate the bearing needles 24.
  • valve arrangement can be configured differently than in the embodiment shown in FIGS. 1-4.
  • an inlet channel 27 is provided in the wall of the crankcase 9.
  • the valve flap 28 of a flutter valve is arranged on the inside of the crankcase 9.
  • the piston 22 moves upward, the valve flap 28 is lifted off the inlet channel 27 and cool outside air can flow into the interior of the crankcase 9.
  • an overpressure is achieved in the crankcase 9, which presses the valve flap 28 against the inner wall of the crankcase 9 and thus closes the inlet channel 27.
  • the cool outside air sucked into the crankcase can now only escape through the spaces 26, the annular channel 15 and the outlet channel 17.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
EP80101145A 1979-03-20 1980-03-06 Moteur à combustion interne à quatre temps à refroidissement par air, avec tiroir rotatif Expired EP0016381B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80101145T ATE3663T1 (de) 1979-03-20 1980-03-06 Luftgekuehlter, drehschiebergesteuerter viertakt- verbrennungsmotor.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2910822 1979-03-20
DE2910822A DE2910822C2 (de) 1979-03-20 1979-03-20 Luftgekühlter, drehschiebergesteuerter Viertakt-Verbrennungsmotor

Publications (2)

Publication Number Publication Date
EP0016381A1 true EP0016381A1 (fr) 1980-10-01
EP0016381B1 EP0016381B1 (fr) 1983-06-01

Family

ID=6065855

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80101145A Expired EP0016381B1 (fr) 1979-03-20 1980-03-06 Moteur à combustion interne à quatre temps à refroidissement par air, avec tiroir rotatif

Country Status (3)

Country Link
EP (1) EP0016381B1 (fr)
AT (1) ATE3663T1 (fr)
DE (1) DE2910822C2 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0644319A1 (fr) * 1993-07-19 1995-03-22 FIN.G.E.F. S.r.l. Moteur à quatre temps à chemise rotative
WO1998003781A1 (fr) * 1996-07-18 1998-01-29 Rcv Engines Limited Moteur a combustion interne
EP0877154A3 (fr) * 1997-05-07 1999-05-19 Giorgio Enrico Falck Moteur à combustion interne avec un système de contrÔle pour une soupape rotative
WO2000060217A1 (fr) * 1999-02-04 2000-10-12 Dimitrios Dardalis Moteur a chemise pivotante
WO2002027165A1 (fr) * 2000-09-27 2002-04-04 Rcv Engines Limited Moteur à soupape rotative
WO2005031119A2 (fr) * 2003-09-24 2005-04-07 Rcv Engines Limited Mecanismes de refroidissement pour moteurs a cylindre a soupape rotative

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10222751B4 (de) * 2002-05-23 2004-06-24 Heinz Lammert Viertakt-Verbrennungsmotor, Kurbeltrieb für einen Verbrennungsmotor sowie Mehrzylinder-Verbrennungsmotor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB116170A (en) * 1917-06-16 1918-06-06 Charles Frederick Ryland Improvements in the Valves of Internal Combustion and other Engines.
FR1419038A (fr) * 1964-10-15 1965-11-26 Système rotatif de distribution pour moteurs thermiques à pistons
FR1493527A (fr) * 1966-05-20 1967-09-01 Dispositif d'alimentation de moteur à explosion par chemise tournante
DE2714351A1 (de) * 1977-03-31 1978-10-05 Dylla Norbert Drehschiebergesteuerter viertakt- verbrennungsmotor
DE2822651A1 (de) * 1978-05-24 1979-11-29 Habsburg Lothringen Leopold Vo Drehschiebersteuerung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH57126A (de) * 1911-04-19 1913-01-02 Paul Gerhardt Verbrennungsmotor mit als Zylinderlaufmantel ausgebildetem Drehschieber
US1861106A (en) * 1925-12-26 1932-05-31 Jean A H Barkeij Internal combustion engine
US1614634A (en) * 1926-05-03 1927-01-18 Ole O Storle Revolving valve-sleeve gas engine
FR2248411A1 (en) * 1973-10-18 1975-05-16 Halder Engines Ltd Two-stroke engine with inlet via crank case - has exhaust ports and overflow ducts from crank case to cylinder in cylinder wall

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB116170A (en) * 1917-06-16 1918-06-06 Charles Frederick Ryland Improvements in the Valves of Internal Combustion and other Engines.
FR1419038A (fr) * 1964-10-15 1965-11-26 Système rotatif de distribution pour moteurs thermiques à pistons
FR1493527A (fr) * 1966-05-20 1967-09-01 Dispositif d'alimentation de moteur à explosion par chemise tournante
DE2714351A1 (de) * 1977-03-31 1978-10-05 Dylla Norbert Drehschiebergesteuerter viertakt- verbrennungsmotor
DE2822651A1 (de) * 1978-05-24 1979-11-29 Habsburg Lothringen Leopold Vo Drehschiebersteuerung

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0644319A1 (fr) * 1993-07-19 1995-03-22 FIN.G.E.F. S.r.l. Moteur à quatre temps à chemise rotative
US5482011A (en) * 1993-07-19 1996-01-09 Fin.G.E.F. S.R.L. Four-cycle internal combustion engine having a rotating cylinder sleeve
WO1998003781A1 (fr) * 1996-07-18 1998-01-29 Rcv Engines Limited Moteur a combustion interne
US6386152B1 (en) * 1996-07-18 2002-05-14 Rvc Engines Limited Internal combustion engine
EP0877154A3 (fr) * 1997-05-07 1999-05-19 Giorgio Enrico Falck Moteur à combustion interne avec un système de contrÔle pour une soupape rotative
WO2000060217A1 (fr) * 1999-02-04 2000-10-12 Dimitrios Dardalis Moteur a chemise pivotante
WO2002027165A1 (fr) * 2000-09-27 2002-04-04 Rcv Engines Limited Moteur à soupape rotative
US7131405B2 (en) 2000-09-27 2006-11-07 Rcv Engines Limited Rotating cylinder valve engine
WO2005031119A2 (fr) * 2003-09-24 2005-04-07 Rcv Engines Limited Mecanismes de refroidissement pour moteurs a cylindre a soupape rotative
WO2005031119A3 (fr) * 2003-09-24 2005-06-23 Rcv Engines Ltd Mecanismes de refroidissement pour moteurs a cylindre a soupape rotative

Also Published As

Publication number Publication date
DE2910822A1 (de) 1980-09-25
DE2910822C2 (de) 1982-12-09
ATE3663T1 (de) 1983-06-15
EP0016381B1 (fr) 1983-06-01

Similar Documents

Publication Publication Date Title
DE69619944T2 (de) Schmieranlage für eine Viertaktbrennkraftmaschinen
DE3883798T2 (de) Brennkraftmaschine mit vertikaler Kurbelwelle für Rasenmäher.
DE69625814T2 (de) Gegenkolben brennkraftmaschine
DE60303834T2 (de) Brennkraftmaschine mit variabeln Kolbenhub
DE3241723A1 (de) Drehschieberanordnung zur steuerung des ladungswechsels einer brennkraftmaschine
DE1136532B (de) Rotationskolben-Brennkraftmaschine
DE3245246A1 (de) Nockenbetaetigte hubkolbenmaschine
DE69413620T2 (de) Brennkraftmaschine mit einer direkten Schmierungsanlage
DE68914852T2 (de) Brennkraftmaschine mit rohrförmigem drehschieber.
DE1933287A1 (de) Rotationsmaschine
DE60017200T2 (de) Viertaktbrennkraftmaschine
EP0016381B1 (fr) Moteur à combustion interne à quatre temps à refroidissement par air, avec tiroir rotatif
DE10051131A1 (de) Schmierungsstruktur für eine Brennkraftmaschine
DE3150654C2 (de) Rotationskolben-Brennkraftmaschine
DE1526462C3 (de) Zweltakt-Brennkraftmaschine
DE60105711T2 (de) Abdichtungsstruktur in einem Motorblock
DE1526434A1 (de) Kreiskolben-Brennkraftmaschine
DE60127049T2 (de) Ventilsteuerungsanordnung in einer Viertakt-Brennkraftmaschine
DE811520C (de) Verfahren zum Schmieren des Zylinders von Verbrennungs-kraftmaschinen, Pumpen, Kompressoren u. dgl.
DE3417488A1 (de) Kuehlung des kolbens einer rotationskolbenbrennkraftmaschine
DE2912476A1 (de) Pleuellager fuer kurbelwellen von zweitaktverbrennungsmotoren
DE7907744U1 (de) Drehschiebergesteuerter viertakt- verbrennungsmotor
DE826664C (de) Zweitaktverbrennungskraftmaschine
DE19727987C2 (de) Zweitakt-Taumelscheiben-Brennkraftmaschine
DE10002585B4 (de) Brennkraftmaschine, Verdichter oder Pumpe mit, die Kanäle steuernden, direkt angetriebenen Drehschiebern mit neuen Gleitflächendichtungen

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

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

17P Request for examination filed

Effective date: 19810328

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

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

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

Ref country code: SE

Effective date: 19830601

Ref country code: NL

Effective date: 19830601

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: 19830601

Ref country code: FR

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

Effective date: 19830601

Ref country code: BE

Effective date: 19830601

REF Corresponds to:

Ref document number: 3663

Country of ref document: AT

Date of ref document: 19830615

Kind code of ref document: T

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
EN Fr: translation not filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

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

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

Ref country code: AT

Payment date: 19890314

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: 19890331

Year of fee payment: 10

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

Ref country code: CH

Payment date: 19890427

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: 19900306

Ref country code: AT

Effective date: 19900306

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

Ref country code: CH

Effective date: 19900331

GBPC Gb: european patent ceased through non-payment of renewal fee
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL