EP0197168B1 - Radiateur pour des moteurs à combustion - Google Patents

Radiateur pour des moteurs à combustion Download PDF

Info

Publication number
EP0197168B1
EP0197168B1 EP85104244A EP85104244A EP0197168B1 EP 0197168 B1 EP0197168 B1 EP 0197168B1 EP 85104244 A EP85104244 A EP 85104244A EP 85104244 A EP85104244 A EP 85104244A EP 0197168 B1 EP0197168 B1 EP 0197168B1
Authority
EP
European Patent Office
Prior art keywords
radiator
crosspieces
walls
cooler
coolant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP85104244A
Other languages
German (de)
English (en)
Other versions
EP0197168A1 (fr
Inventor
Dieter Baumann
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.)
Ing Walter Hengst GmbH and Co KG
Original Assignee
Ing Walter Hengst GmbH and Co KG
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 Ing Walter Hengst GmbH and Co KG filed Critical Ing Walter Hengst GmbH and Co KG
Priority to AT85104244T priority Critical patent/ATE45029T1/de
Priority to DE8585104244T priority patent/DE3571868D1/de
Priority to EP85104244A priority patent/EP0197168B1/fr
Publication of EP0197168A1 publication Critical patent/EP0197168A1/fr
Application granted granted Critical
Publication of EP0197168B1 publication Critical patent/EP0197168B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/048—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
    • F28D1/0308—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other
    • F28D1/0316—Assemblies of conduits in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F7/00—Elements not covered by group F28F1/00, F28F3/00 or F28F5/00
    • F28F7/02—Blocks traversed by passages for heat-exchange media

Definitions

  • the invention relates to a cooler for internal combustion engines, cooling units, compressors and other systems requiring heat exchange, in which a liquid coolant is guided in flat, parallel coolant channels, the heat-conducting walls of which are provided with surface-enlarging means and which are transversely to the direction of flow by means of ventilation and / or head wind of the coolant are swept by air, the cooler consisting of cooler parts with their vertical flat sides sealingly placed against one another, the walls on the side facing away from the other cooler part being closed and on the side facing the other cooler part being open and carrying transverse webs arranged between them , whereby air ducts running between the latter are formed.
  • a cooler of the type mentioned is known from NL-A-7513374.
  • This cooler is assembled from a plurality of cooler parts which are sealingly connected to one another on their vertical side surfaces, two cooler parts each being required to form a coolant channel.
  • the side faces of the cooler parts placed one against the other lie in mutually parallel vertical planes which coincide with the planes of the channels. Furthermore, these levels lie in the level of the flow direction of the cooling air flowing through the cooler.
  • the transverse webs are each connected at one end to the associated wall of the channel or formed in one piece.
  • a disadvantage of this cooler is that each channel must be sealed along its two narrow sides over its entire length. Since two cooler parts are required for each duct, a large number of individual parts and sealing surfaces result, which makes the assembly of the cooler complex and entails an increased risk of leakage. Another disadvantage is that the crosspieces run out freely at one end and can butt butt against the adjacent wall of the next cooler part, which worsens the heat conduction and leads to a reduced efficiency of the cooler. Finally, in the known cooler, it is also disadvantageous that the cooling air flows through the cooler in a largely laminar flow, as a result of which the amount of heat that can be transferred from the cooler to the cooling air is limited.
  • a heat exchanger for motor vehicles which serves to heat water for heating purposes by the hot exhaust gases of the internal combustion engine of the vehicle.
  • the heat exchanger has a channel running in serpentine lines for guiding the exhaust gases, which channel is formed within a middle part of the heat exchanger.
  • the middle part is composed of two parts which are sealingly connected to one another along a center plane running parallel to the exhaust gas flow direction.
  • two lids are sealingly attached to the flat sides of the central part, as a result of which a water space through which the water to be heated can flow is formed on both sides of the central part. It is not possible to use this heat exchanger as an air-flow cooler for the cooling water of an internal combustion engine.
  • a cooler of the type mentioned at the outset which is characterized in that two cooler parts are sealingly placed along a single plane running vertically and transversely to the air flow direction, that the transverse webs each connect the two adjacent walls of two coolant channels with one another and with these are in one piece and that the crossbars of a cooler part or both cooler parts are each arranged vertically offset in two vertical planes.
  • An advantage of the new cooler is that only two cooler parts are required to form a cooler with a largely arbitrary number of coolant channels, so that the cooler only has to be sealed in a single plane.
  • the new design of the crosspieces ensures better heat transfer from the cooling water to the air flowing through, which is forced to create a turbulent flow through the cooler.
  • the new cooler is easy to manufacture and assemble and has a reduced risk of leakage.
  • the crosspieces are alternately inclined opposite one another in opposite directions to the horizontal. On the one hand, this results in a higher rigidity and stability of the cooler parts against deformation due to the diagonal course of the crosspieces and, on the other hand, an enlargement of the air-side heat exchange surface by extending the crosspieces, both of which are desirable properties.
  • An optimal air flow with maximum swirling results from an arrangement of oppositely inclined, one behind the other transverse webs, which can additionally have a mutual height offset.
  • the air flow is not only forced to change height, but also to change direction to the side.
  • a swirling of the flowing medium can also make sense on the liquid side of the cooler, ie in the coolant channels, especially when it comes to liquids of higher viscosity and lower thermal conductivity, such as motor oil.
  • ribs arranged in the coolant channels on the walls and running perpendicular to the flow direction of the coolant are provided. Their number, height and cross-sectional shape depends on the requirements, such as required turbulence, maxi permissible pressure loss, required flow cross-sections etc. and is at the discretion of the specialist.
  • a preferred shape for the ribs is a trapezoidal cross section, since this is easy to manufacture, aerodynamically efficient, effective and stable.
  • the material for the two cooler parts is preferably aluminum or an aluminum alloy. This offers the advantages of easy processing and machining, low weight, high corrosion resistance and high stability.
  • the material can also be a heat-conducting, temperature-resistant plastic.
  • This material has the advantage that it is even lighter than aluminum and completely corrosion-free, but the efficiency of a cooler made of this material is somewhat lower because of the generally lower thermal conductivity of plastics compared to metals.
  • the cheapest manufacturing process, at least for the two cooler parts, is the die casting process.
  • This method is particularly economical and can be used without further ado because of the special design of the two cooler parts.
  • the essential prerequisite for the die casting process, the demoldability of the castings, is given in the cooler according to the invention.
  • this manufacturing method offers the possibility of adapting the shape of the radiator parts to a certain extent, for example to a vehicle shape, i. H. e.g. B. to form a convex radiator front.
  • a modular system can be implemented with the cooler parts according to the invention, i.e. that the cooler parts are composed of identical cooler segments which are sealingly connected to one another.
  • the cooler can be assembled according to the required heat exchange area.
  • the sealing and connection of the segments is carried out by conventional means such. B. bracing or screwing with the interposition of seals.
  • a cheaper solution for increasing the heat exchange surface without increasing the width and height of a cooler is achieved in that between the two cooler parts at least one congruent, but on both sides open coolant channels forming walls having an intermediate part with the walls connecting crosspieces is arranged.
  • This intermediate part expands the advantageous modular system, so that different coolers can be produced with few components in terms of height, width and depth.
  • a particularly favorable manufacturing method is the one-piece production of cooler parts including the upper and lower water tanks, e.g. B. in the die casting process, which is easily possible because of the two-part design of the cooler.
  • the cooler according to the invention e.g. can be built round in adaptation to the rotor diameter of a radiator fan or that a two-circuit cooling system in which cooling water flows through part of the cooler and 01 through the other part can be implemented very easily.
  • a cooler segment 1 of the cooler according to the invention is composed of a front cooler part 2 and a rear cooler part 3.
  • Both cooler parts 2, 3 have transversely running walls 4, which end congruently on the flat sides 21 and 31 of the two cooler parts 2, 3 facing one another, while the walls 4 on the flat sides 22 and 32 facing away from one another show a closed course.
  • parallel channels 5 are formed for a liquid cooling medium.
  • the two cooler parts 2, 3 are connected to one another in a sealing manner on the flat sides 21 and 31.
  • FIG. 2 shows a cooler part 2, 3 in vertical section.
  • the walls 4 forming the vertical coolant channels 5 are each connected to one another by a plurality of transverse webs 7, the walls 4 and transverse webs 7 being in one piece in the exemplary embodiment shown.
  • the transverse webs 7 are alternately inclined opposite one another opposite the horizontal and form horizontal air channels 6 running transversely to the coolant channels 5.
  • In the coolant channels 5 there are ribs 8 protruding from the walls 4 on their inner surfaces 5 'for swirling the flowing coolant transversely to its direction of flow arranged progressively.
  • the arrangement of walls 4 and cross struts 7 shown in detail in the left part of the figure is repeated several times in the horizontal direction in accordance with the scheme given by the parallel lines in the remaining part of FIG. 2 for forming a cooler segment 1.
  • FIG. 3 shows a somewhat modified embodiment of the invention using the example of one of the cooler parts 2, 3 on a larger scale than the other figures.
  • the transverse webs 7 of the cooler part 2 or 3 are arranged within the cooler part 2 or 3 along a vertical plane lying approximately in the middle of the cooler part 2 or 3, indicated by the dashed lines 11, 12 in FIG.
  • This level simultaneously represents the tool dividing line in the production of the cooler part 2 or 3 in the die-casting process, whereby demolding is carried out in two directions, while the design of the cooler part 2 or 3 described first can also be produced with one-sided demolding.
  • FIG. 4 shows the position of the cross struts 7 in a cross section of a cooler segment 1 formed by the connection of two cooler parts 2, 3 of the last-described embodiment.
  • the transverse webs are arranged one behind the other in four planes at different heights. This results in air channels 6 with a triple-deflected course, which results in a good swirling of the air flow.
  • FIG. 5 shows an intermediate part 10 for insertion between the two cooler parts 2 and 3, which, with the walls 4 and channels 5 thereof, has congruent walls 14 and open channels 15 and transverse webs 7 on the front and rear.
  • the transverse webs 7 can be continuous as well as offset in height in two planes.
  • the transverse webs 7 of the intermediate part 10 are arranged in height levels not yet occupied in the front and rear radiator parts 2 and 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Claims (12)

1. Radiateur (1) pour moteurs à combustion, dispositifs de refroidissement, compresseurs et autres installations exigeant un échange de chaleur, dans lequel un agent réfrigérant liquide passe dans des canaux d'agent réfrigérant plats et parallèles (5) dont les parois (4) conductrices de la chaleur sont munies de moyens (8) augmentant la surface, et sont balayées par de l'air, transversalement à la direction d'écoulement de l'agent réfrigérant, au moyen d'une ventilation et/ou du vent dû au déplacement, le radiateur (1) étant constitué par des parties de radiateur (2, 3) appliquées l'une contre l'autre, avec étanchéité, en leurs côtés plats verticaux, les parois (4) étant fermées en chaque côté éloigné de l'autre partie de radiateur (2; 3) et étant ouvertes en chaque côté tourné vers l'autre partie de radiateur (2, 3) et portant des âmes transversales (7) agencées entre celles-ci, ce qui a pour effet de former des canaux d'air (6) qui passent entre ces âmes transversales, caractérisé par le fait que deux parties de radiateur (2, 3) sont appliquées l'une contre l'autre, avec étanchéité, le long d'un seul plan disposé verticalement et transversalement à la direction d' écoulement de l'air, par le fait que les âmes transversales (7) relient à chaque fois les deux parois voisines (4) de deux canaux d'agent réfrigérant (5) et sont d'un seul tenant avec celles-ci; et par le fait que les âmes transversales (7) d'une partie de radiateur (2,3) ou des deux parties de radiateur (2, 3) sont agencées en étant à chaque fois successivement décalées en hauteur dans deux plans verticaux.
2. Radiateur selon la revendication 1, caractérisé par le fait que les âmes transversales (7) disposées les unes au-dessus des autres ont, de manière alternée, des inclinaisons opposées par rapport à l'horizontale.
3. Radiateur selon les revendications 1 et 2, caractérisé par le fait que les âmes transversales (7) disposées les unes à la suite des autres ont, de manière alternée, des inclinaisons opposées par rapport à l'horizontale.
4. Radiateur selon les revendications 1 à 3, caractérisé par le fait que les parois (4) des canaux d'agent de refroidissement (5) présentent, sur leurs côtés intérieurs (5'), des nervures (8) suivant un tracé transversal à la direction d'écoulement de l'agent réfrigérant.
5. Radiateur selon la revendication 4, caractérisé par le fait que les nervures (8) ont une section droite trapézoïdale.
6. Radiateur selon les revendications 1 à 5, caractérisé par le fait que les deux parties de radiateur (2, 3) sont en aluminium ou en un alliage d'aluminium.
7. Radiateur selon les revendications 1 à 5, caractérisé par le fait que les deux parties de radiateur (2, 3) sont en une matière plastique thermo- conductrice, résistant à la température.
8. Radiateur selon les revendications 1 à 7, caractérisé par le fait que les deux parties de radiateur (2, 3) sont réalisées chacune en tant que pièce moulée par un procédé de moulage sous pression.
9. Radiateur selon les revendications 1 à 8, caractérisé par le fait que les parties de radiateur (2, 3) sont composées de segments de radiateur (1) identiques mutuellement assembles de manière étanche.
10. Radiateur selon les revendications 1 à 9, caractérisé par le fait qu'entre les deux parties de radiateur (2, 3) est agencée au moins une partie intermédiaire (10) présentant également des parois (14) formant des canaux d'agent réfrigérant (15) offrant une coincidence de contours, toutefois ouverts des deux côtés, et dotée d'âmes transversales reliant les parois (14).
11. Radiateur selon les revendications 1 à 12, caractérisé par le fait que les deux parties de radiateur (2, 3) sont munies chacune de parois, d'un seul tenant avec les parties de radiateur (2, 3) formant chacune une boîte à eau supérieure et inférieure présentant une arrivée et une sortie.
EP85104244A 1985-04-09 1985-04-09 Radiateur pour des moteurs à combustion Expired EP0197168B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT85104244T ATE45029T1 (de) 1985-04-09 1985-04-09 Kuehler fuer verbrennungsmotoren.
DE8585104244T DE3571868D1 (en) 1985-04-09 1985-04-09 Cooler for combustion engines
EP85104244A EP0197168B1 (fr) 1985-04-09 1985-04-09 Radiateur pour des moteurs à combustion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP85104244A EP0197168B1 (fr) 1985-04-09 1985-04-09 Radiateur pour des moteurs à combustion

Publications (2)

Publication Number Publication Date
EP0197168A1 EP0197168A1 (fr) 1986-10-15
EP0197168B1 true EP0197168B1 (fr) 1989-07-26

Family

ID=8193432

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85104244A Expired EP0197168B1 (fr) 1985-04-09 1985-04-09 Radiateur pour des moteurs à combustion

Country Status (3)

Country Link
EP (1) EP0197168B1 (fr)
AT (1) ATE45029T1 (fr)
DE (1) DE3571868D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114607510B (zh) * 2022-03-18 2023-02-28 中国航发沈阳发动机研究所 一种航空发动机转差自适应调整方法及系统

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB816541A (en) * 1956-07-27 1959-07-15 Serck Radiators Ltd Tubular heat exchange apparatus
GB528623A (en) * 1939-01-31 1940-11-04 Arthur Bland Tillotson Improvements in plate heat exchangers suitable for heating air
DE901541C (de) * 1940-08-02 1954-01-11 Walther Lindner Waermeaustausch-Vorrichtung
DE873921C (de) * 1941-01-30 1953-04-20 Artur Dietz Kuehler
FR1566565A (fr) * 1968-03-20 1969-05-09
FR1588256A (fr) * 1968-08-27 1970-04-10
NL7513374A (en) * 1975-11-15 1977-05-17 Giesen Metaalgieterij Motor vehicle radiator arrangement - has light alloy casting forming central part between two end boxes
IT1070488B (it) * 1976-09-23 1985-03-29 Fiat Spa Perfezionamenti negli scambiatori di calore tra fluidi particolarmente per l utilizzazione dei gas di scarico di motori termici

Also Published As

Publication number Publication date
DE3571868D1 (en) 1989-08-31
ATE45029T1 (de) 1989-08-15
EP0197168A1 (fr) 1986-10-15

Similar Documents

Publication Publication Date Title
EP0974804B1 (fr) Echangeur de chaleur, en particulier échangeur de chaleur pour gaz d'échappement
DE69004220T2 (de) Wärmetauscher mit einer umfangsförmigen Zirkulation.
DE3813339C2 (de) Wärmetauscher für Kraftfahrzeuge und Verfahren zu seiner Herstellung
DE202006009464U1 (de) Wärmetauscher
DE102008036222B3 (de) Wärmeübertragungseinheit für eine Verbrennungskraftmaschine
DE1551489A1 (de) Waermeaustauscher
DE102018106936A1 (de) Ladeluftkühler aus einem flüssigkeitsgekühlten Vorkühler und einem luftgekühlten Hauptkühler
DE2330076A1 (de) Rippenrohr-waermeaustauscher
DE2953704C2 (de) Röhren-Platten-Wärmeaustauscher
DE3116033C2 (fr)
DE10120483A1 (de) Anordnung zur Kühlung
EP0180086B1 (fr) Refroidisseur d'huile
DE3508834A1 (de) Oelfilter mit integriertem waermetauscher
EP0582835B1 (fr) Echangeur de chaleur
DE102006029043B4 (de) Wärmeübertragungseinheit für eine Verbrennungskraftmaschine
DE2855285C2 (fr)
EP0305702A1 (fr) Echangeur de chaleur avec dispositif de tubes à ailettes
EP0286704B1 (fr) Echangeur de chaleur pour deux milieux fluides
DE102006061440A1 (de) Kühlflüssigkeitskühler
DE202004011489U1 (de) Wärmeaustauscher für Hochtemperatur-Anwendungen, insbesondere Ladeluftkühler
DE4327213C2 (de) Rekuperativer Wärmetauscher, insbesondere Kühler für Kraftfahrzeuge
EP0197168B1 (fr) Radiateur pour des moteurs à combustion
DE3209760C2 (de) Wärmeaustauscher
DE3328229C2 (de) Wärmetauscher
DE2556660A1 (de) Kreuzstromwaermetauscher

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: A1

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

17P Request for examination filed

Effective date: 19870316

17Q First examination report despatched

Effective date: 19870624

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

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

REF Corresponds to:

Ref document number: 45029

Country of ref document: AT

Date of ref document: 19890815

Kind code of ref document: T

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3571868

Country of ref document: DE

Date of ref document: 19890831

ITF It: translation for a ep patent 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
ITTA It: last paid annual fee
EPTA Lu: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 85104244.0

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

Ref country code: CH

Payment date: 19980318

Year of fee payment: 14

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

Ref country code: BE

Payment date: 19980319

Year of fee payment: 14

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

Ref country code: LU

Payment date: 19980401

Year of fee payment: 14

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

Ref country code: AT

Payment date: 19980429

Year of fee payment: 14

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

Ref country code: NL

Payment date: 19980430

Year of fee payment: 14

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

Ref country code: LU

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

Effective date: 19990409

Ref country code: AT

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

Effective date: 19990409

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

Ref country code: LI

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

Effective date: 19990430

Ref country code: CH

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

Effective date: 19990430

Ref country code: BE

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

Effective date: 19990430

BERE Be: lapsed

Owner name: WALTER HENGST G.M.B.H. & CO. K.G.

Effective date: 19990430

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

Ref country code: NL

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

Effective date: 19991101

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19991101

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

Ref country code: SE

Payment date: 20010308

Year of fee payment: 17

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

Ref country code: FR

Payment date: 20010316

Year of fee payment: 17

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

Ref country code: GB

Payment date: 20010326

Year of fee payment: 17

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

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: 20020409

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 NON-PAYMENT OF DUE FEES

Effective date: 20020410

EUG Se: european patent has lapsed

Ref document number: 85104244.0

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

Effective date: 20020409

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: 20021231

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: DE

Payment date: 20030616

Year of fee payment: 19

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: 20041103