[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

EP0142209A2 - Anlage, wie Kühlanlage oder Wärmepumpe - Google Patents

Anlage, wie Kühlanlage oder Wärmepumpe Download PDF

Info

Publication number
EP0142209A2
EP0142209A2 EP84201623A EP84201623A EP0142209A2 EP 0142209 A2 EP0142209 A2 EP 0142209A2 EP 84201623 A EP84201623 A EP 84201623A EP 84201623 A EP84201623 A EP 84201623A EP 0142209 A2 EP0142209 A2 EP 0142209A2
Authority
EP
European Patent Office
Prior art keywords
ejector
condenser
liquid
separation vessel
refrigerant
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
EP84201623A
Other languages
English (en)
French (fr)
Other versions
EP0142209A3 (en
EP0142209B1 (de
Inventor
Johannes Gerardus Romijn
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.)
Grassos Koniklijke Machinefabrieken NV
Original Assignee
Grassos Koniklijke Machinefabrieken NV
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 Grassos Koniklijke Machinefabrieken NV filed Critical Grassos Koniklijke Machinefabrieken NV
Priority to AT84201623T priority Critical patent/ATE32944T1/de
Publication of EP0142209A2 publication Critical patent/EP0142209A2/de
Publication of EP0142209A3 publication Critical patent/EP0142209A3/en
Application granted granted Critical
Publication of EP0142209B1 publication Critical patent/EP0142209B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/006—Accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/001—Ejectors not being used as compression device
    • F25B2341/0012—Ejectors with the cooled primary flow at high pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/001—Ejectors not being used as compression device
    • F25B2341/0015—Ejectors not being used as compression device using two or more ejectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/16—Receivers

Definitions

  • the invention relates to a plant consisting of a circuit system with one or more compressors, one or more condensers, one or more evaporators, a separation vessel for liquid and vaporous refrigerants, and an ejector system to use the high pressure from the liquid refrigerant coming from the condenser(s) for conveyance of the liquid refrigerant from the separation vessel to the evaporator(s).
  • a plant consisting of a circuit system with one or more compressors, one or more condensers, one or more evaporators, a separation vessel for liquid and vaporous refrigerants, and an ejector system to use the high pressure from the liquid refrigerant coming from the condenser(s) for conveyance of the liquid refrigerant from the separation vessel to the evaporator(s).
  • Such plants are known in the literature.
  • Dutch Patent Application 8105395 shows a cooling plant in which an ejector is used instead of a throttle device and a centrifugal pump
  • the energy which would otherwise be destroyed in the throttle device during throttling of the liquid refrigerant coming under high pressure from the condenser can be used effectively to convey the low-pressure liquid refrigerant from the separation vessel to the evaporator(s).
  • a plant with a centrifugal pump or the like can, if necessary, be very simply adjusted by changing the speed of the pump.
  • the pump is, however, generally dimensioned for the maximum capacity of the plant. If a lower capacity is required, the pump continues to run at the same speed, which is a disadvantage from the point of view of energy consumption.
  • An ejector system then has advantages.
  • the disadvantages are that an ejector is geared to a particular capacity of the plant and is difficult or impossible to regulate.
  • Another complication here is that the mass flow of the liquid which is circulated through the ejector depends on the pressure difference over the ejector and increases with increasing pressure difference.
  • the mass flow fed through the compressor also depends on the pressure difference, but this mass flow decreases with increasing pressure difference.
  • the object of the invention is now to produce, in a plant with ejector circulation, regulation which is loss-free as far as possible, and this is achieved according to the invention by the ejector system having more than one ejector, connected in parallel, with means being provided to put the second or next ejector into operation if more liquid collects in the condenser than can be discharged.
  • the invention therefore saves on capital outlay and on energy consumption, while good adaptation to the required capacity is possible.
  • the compressor is indicated by 1, the condensor by 2, the separation vessel by 3, and the evaporators by 4, in this case two of them.
  • the suction line of the compressor 1 is indicated by 5 and debouches in a U-shape into the vapour chamber 6 of the separation vessel 3.
  • the liquid chamber of the vessel 3 is indicated by 7.
  • the line between compressor 1 and condenser 2 is indicated by 8.
  • a conventional oil separator 9 can also be set up in this line 8. The necessity for this depends on the type of compressor 1 used.
  • a line 10 discharges liquid refrigerant under high pressure from the condenser 2.
  • this line 11 there is a circulation device, consisting of two ejectors 12 and 13 connected in parallel and being the same or differing in size.
  • the line 10 coming from the condenser connects with the lefthand inlet of the ejector 12. Through this high-pressure liquid, low-pressure liquid is sucked in from the liquid part 7 via the line 11 and taken to the evaporator(s).
  • the high-pressure liquid from the condenser is first supercooled in the liquid bath 7.
  • a second ejector 13 is switched on in parallel by opening a valve 14.
  • the valve 14 of the second ejector 13 is opened if too much liquid accumulates in condenser 2. This excess liquid can be determined using a level gauge in the condenser which opens and closes the valve 14 with known means. This level gauge is not shown.
  • Fig. 1 does show another arrangement, in which another ejector is switched on when the quantity of liquid in the condenser 2 becomes too high.
  • the temperature difference between the condenser and the outside air must o remain constant as far as possible, being preferably of the order 11 K 0 + 1 K.
  • the difference in pressure between the vapour in the condenser and the saturation pressure of the refrigerant at the temperature of the outside air is used as the signal for switching on a second or further ejector.
  • a small quantity of liquid refrigerant is to this end enclosed in a sensor 15, which is exposed to the outside air. Part of the liquid evaporates, and the pressure of the saturated vapour is passed on to an instrument 16, to which the condenser 2 is also connected via a line 8a.
  • the line 10 runs from the condenser 2 into the vapour chamber 6 of the vessel 2 which is in heat exchanging contact with the U-shaped inlet 18 of the suction line 5 of the compressor, as a result of which the inlet 18 is heated.
  • the vapour sucked up by the compressor is in this way considerably preheated by the warm high-pressure liquid from the condenser 2, as a result of which any liquid droplets formed convert to vapour form, so that no liquid is fed to the compressor.
  • the line 10 is conducted further in heat exchanging contact, with a capillary line 19, which connects with the line 11 and debouches above the inlet 18.
  • the line 10 then runs in heat exchanging contact through the liquid bath 7 of the vessel 3.
  • a filter drier 20 which is known per se, and which removes impurities and moisture from the liquid refrigerant.
  • Fig. 2 shows a longitudinal section through one of the ejectors according to the invention, for example ejector 13.
  • This consists of a massive element 21, which is preferably hectagonal in transverse section, and is made of brass or the like, with four connections.
  • the bottom connection is for connection to the ejector 12 set up below it. If the ejector is the lowest one, this connection is closed off with a cap or the like.
  • the line 10 connects with the lefthand connection, and the line part 11 leading to the evaporator(s) connects with the righthand connection.
  • the passage is formed by stepped cylindrical channels 22, 23 and 24 and a wider mixing part 25.
  • a passage made up of cylindrical bores is considerably simpler to produce than a double conical passage.
  • the bores can be made with a conventional drilling device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Lubricants (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
EP84201623A 1983-11-11 1984-11-09 Anlage, wie Kühlanlage oder Wärmepumpe Expired EP0142209B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84201623T ATE32944T1 (de) 1983-11-11 1984-11-09 Anlage, wie kuehlanlage oder waermepumpe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8303877 1983-11-11
NL8303877A NL8303877A (nl) 1983-11-11 1983-11-11 Installatie, zoals koelinstallatie of warmtepomp.

Publications (3)

Publication Number Publication Date
EP0142209A2 true EP0142209A2 (de) 1985-05-22
EP0142209A3 EP0142209A3 (en) 1985-12-04
EP0142209B1 EP0142209B1 (de) 1988-03-09

Family

ID=19842700

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84201623A Expired EP0142209B1 (de) 1983-11-11 1984-11-09 Anlage, wie Kühlanlage oder Wärmepumpe

Country Status (4)

Country Link
EP (1) EP0142209B1 (de)
AT (1) ATE32944T1 (de)
DE (1) DE3469799D1 (de)
NL (1) NL8303877A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995030117A1 (en) * 1994-04-28 1995-11-09 Frigoscandia Equipment Ab Refrigeration system
US5964986A (en) * 1996-10-09 1999-10-12 Sulzer Chemtech Ag Distillation plant
WO2006091190A1 (en) * 2005-02-18 2006-08-31 Carrier Corporation Refrigeration circuit with improved liquid/vapour receiver

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107532827B (zh) 2015-05-12 2021-06-08 开利公司 喷射器制冷回路
US10323863B2 (en) 2015-05-12 2019-06-18 Carrier Kältetechnik Deutschland Gmbh Ejector refrigeration circuit

Citations (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR414466A (fr) * 1909-10-18 1910-09-03 Bbc Brown Boveri & Cie Procédé et dispositif de fonctionnement des trombes d'eau à jet aspirant
GB125650A (en) * 1916-10-07 1919-05-01 G & J Weir Ltd Improvements in or relating to Steam-jet Air Ejectors.
CH152356A (de) * 1930-11-14 1932-01-31 Sulzer Ag Kälteanlage.
US2016056A (en) * 1935-08-01 1935-10-01 Frick Co Liquid circulating system
US2119864A (en) * 1936-10-19 1938-06-07 George M Kleucker Fluid cooling apparatus and method
US2168438A (en) * 1936-04-08 1939-08-08 Carrier Corp Refrigerant circulation
DE705684C (de) * 1938-01-18 1941-05-07 Ing Karl Krismer Fluessigkeitsstrahlpumpe
US2472729A (en) * 1940-04-11 1949-06-07 Outboard Marine & Mfg Co Refrigeration system
US2512869A (en) * 1948-04-24 1950-06-27 James C Mcbroom Method and apparatus for circulating refrigerants
US2595995A (en) * 1947-05-20 1952-05-06 Thorwid Carl Refrigerating plant
US3315484A (en) * 1965-05-17 1967-04-25 Phillips & Co H A Pressurized refrigeration circulating system
US3369374A (en) * 1966-06-20 1968-02-20 Carrier Corp Capacity control for refrigeration systems
US3430453A (en) * 1967-01-24 1969-03-04 American Air Filter Co Refrigerant condenser arrangement
AU421335B2 (en) * 1966-09-05 1972-02-09 Improvements relating to full flooded refrigeration systems
FR2147510A6 (de) * 1971-07-29 1973-03-09 Bevengut Pierre Ets
US3938349A (en) * 1973-09-21 1976-02-17 Daikin Kogyo Co., Ltd. Refrigerating apparatus with superheat control
FR2304041A1 (fr) * 1975-03-11 1976-10-08 Kvaerner Brug Kjoleavdelning Dispositif pour une installation de compression et de condensation de gaz
GB1502607A (en) * 1975-05-19 1978-03-01 Star Refrigeration Low pressure receivers for a refrigerating system
US4230470A (en) * 1977-01-21 1980-10-28 Hitachi, Ltd. Air conditioning system
GB1582898A (en) * 1977-07-25 1981-01-14 Kamelmacher E Jet pump or mixer and jet means therefor
US4406134A (en) * 1981-11-23 1983-09-27 General Electric Company Two capillary vapor compression cycle device

Patent Citations (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR414466A (fr) * 1909-10-18 1910-09-03 Bbc Brown Boveri & Cie Procédé et dispositif de fonctionnement des trombes d'eau à jet aspirant
GB125650A (en) * 1916-10-07 1919-05-01 G & J Weir Ltd Improvements in or relating to Steam-jet Air Ejectors.
CH152356A (de) * 1930-11-14 1932-01-31 Sulzer Ag Kälteanlage.
US2016056A (en) * 1935-08-01 1935-10-01 Frick Co Liquid circulating system
US2168438A (en) * 1936-04-08 1939-08-08 Carrier Corp Refrigerant circulation
US2119864A (en) * 1936-10-19 1938-06-07 George M Kleucker Fluid cooling apparatus and method
DE705684C (de) * 1938-01-18 1941-05-07 Ing Karl Krismer Fluessigkeitsstrahlpumpe
US2472729A (en) * 1940-04-11 1949-06-07 Outboard Marine & Mfg Co Refrigeration system
US2595995A (en) * 1947-05-20 1952-05-06 Thorwid Carl Refrigerating plant
US2512869A (en) * 1948-04-24 1950-06-27 James C Mcbroom Method and apparatus for circulating refrigerants
US3315484A (en) * 1965-05-17 1967-04-25 Phillips & Co H A Pressurized refrigeration circulating system
US3369374A (en) * 1966-06-20 1968-02-20 Carrier Corp Capacity control for refrigeration systems
AU421335B2 (en) * 1966-09-05 1972-02-09 Improvements relating to full flooded refrigeration systems
US3430453A (en) * 1967-01-24 1969-03-04 American Air Filter Co Refrigerant condenser arrangement
FR2147510A6 (de) * 1971-07-29 1973-03-09 Bevengut Pierre Ets
US3938349A (en) * 1973-09-21 1976-02-17 Daikin Kogyo Co., Ltd. Refrigerating apparatus with superheat control
FR2304041A1 (fr) * 1975-03-11 1976-10-08 Kvaerner Brug Kjoleavdelning Dispositif pour une installation de compression et de condensation de gaz
GB1502607A (en) * 1975-05-19 1978-03-01 Star Refrigeration Low pressure receivers for a refrigerating system
US4230470A (en) * 1977-01-21 1980-10-28 Hitachi, Ltd. Air conditioning system
GB1582898A (en) * 1977-07-25 1981-01-14 Kamelmacher E Jet pump or mixer and jet means therefor
US4406134A (en) * 1981-11-23 1983-09-27 General Electric Company Two capillary vapor compression cycle device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995030117A1 (en) * 1994-04-28 1995-11-09 Frigoscandia Equipment Ab Refrigeration system
US5964986A (en) * 1996-10-09 1999-10-12 Sulzer Chemtech Ag Distillation plant
WO2006091190A1 (en) * 2005-02-18 2006-08-31 Carrier Corporation Refrigeration circuit with improved liquid/vapour receiver

Also Published As

Publication number Publication date
EP0142209A3 (en) 1985-12-04
ATE32944T1 (de) 1988-03-15
EP0142209B1 (de) 1988-03-09
DE3469799D1 (en) 1988-04-14
NL8303877A (nl) 1985-06-03

Similar Documents

Publication Publication Date Title
US4304102A (en) Refrigeration purging system
US5186012A (en) Refrigerant composition control system for use in heat pumps using non-azeotropic refrigerant mixtures
US20030213261A1 (en) Utilization of harvest and/or melt water from an ice machine for a refrigerant subcool/precool system and method therefor
US4435962A (en) Refrigerating apparatus
US4280334A (en) Water condensate recovery device
US4631926A (en) Method of obtaining low temperatures and apparatus for implementing the same
US4223537A (en) Air cooled centrifugal water chiller with refrigerant storage means
US6038875A (en) Vapor compression system
US6018958A (en) Dry suction industrial ammonia refrigeration system
US5782131A (en) Flooded cooler with liquid level sensor
EP0198539B1 (de) Verfahren zum Betrieb einer Absorptionswärmepumpe oder -kühleinrichtung und eine Absorptionswärmepumpe oder -kühleinrichtung
US4267705A (en) Refrigeration purging system
EP0142209A2 (de) Anlage, wie Kühlanlage oder Wärmepumpe
US4832068A (en) Liquid/gas bypass
US1783464A (en) Refrigerating machine
JP3034603B2 (ja) 蒸気圧縮システム及びフロート弁
CA2208536A1 (en) Vapour compression system
US3276226A (en) Refrigeration system with turbine drive for compressor
EP0624763A1 (de) Verflüssiger mit freiem Abfluss für eine Kälteanlage
WO1982000053A1 (en) Heat pump
US3345829A (en) Method and means for controlling the condensation of vapors under a varying ambient
US4393661A (en) Means and method for regulating flowrate in a vapor compression cycle device
KR200267362Y1 (ko) 냉동시스템
US3241335A (en) Cooler
SU926454A1 (ru) Холодильна машина

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 DE FR GB IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

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

17P Request for examination filed

Effective date: 19851101

17Q First examination report despatched

Effective date: 19860407

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: 32944

Country of ref document: AT

Date of ref document: 19880315

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3469799

Country of ref document: DE

Date of ref document: 19880414

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

Ref document number: 84201623.0

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

Ref country code: GB

Payment date: 19970507

Year of fee payment: 13

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

Ref country code: LU

Payment date: 19970509

Year of fee payment: 13

Ref country code: AT

Payment date: 19970509

Year of fee payment: 13

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

Ref country code: CH

Payment date: 19970512

Year of fee payment: 13

Ref country code: BE

Payment date: 19970512

Year of fee payment: 13

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

Ref country code: SE

Payment date: 19970515

Year of fee payment: 13

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

Ref country code: NL

Payment date: 19970516

Year of fee payment: 13

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

Ref country code: FR

Payment date: 19970526

Year of fee payment: 13

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

Ref country code: DE

Payment date: 19970528

Year of fee payment: 13

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: 19971109

Ref country code: GB

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

Effective date: 19971109

Ref country code: AT

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

Effective date: 19971109

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: 19971110

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: 19971130

Ref country code: FR

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

Effective date: 19971130

Ref country code: CH

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

Effective date: 19971130

Ref country code: BE

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

Effective date: 19971130

BERE Be: lapsed

Owner name: GRASSO'S KONINKLIJKE MACHINEFABRIEKEN N.V.

Effective date: 19971130

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: 19980601

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

Effective date: 19971109

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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: 19980801

EUG Se: european patent has lapsed

Ref document number: 84201623.0

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

Effective date: 19980601

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST