EP0583574B1 - Gasheizkessel - Google Patents

Gasheizkessel Download PDF

Info

Publication number
EP0583574B1
EP0583574B1 EP93109912A EP93109912A EP0583574B1 EP 0583574 B1 EP0583574 B1 EP 0583574B1 EP 93109912 A EP93109912 A EP 93109912A EP 93109912 A EP93109912 A EP 93109912A EP 0583574 B1 EP0583574 B1 EP 0583574B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
water
add
boiler according
pocket
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93109912A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0583574A1 (de
Inventor
Hans Dr. Viessmann
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.)
Individual
Original Assignee
Individual
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
Priority claimed from DE9210972U external-priority patent/DE9210972U1/de
Priority claimed from DE19924229146 external-priority patent/DE4229146C1/de
Application filed by Individual filed Critical Individual
Publication of EP0583574A1 publication Critical patent/EP0583574A1/de
Application granted granted Critical
Publication of EP0583574B1 publication Critical patent/EP0583574B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/24—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers
    • F24H1/26—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body
    • F24H1/28—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body including one or more furnace or fire tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/48—Water heaters for central heating incorporating heaters for domestic water
    • F24H1/52—Water heaters for central heating incorporating heaters for domestic water incorporating heat exchangers for domestic water
    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0037—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the conduits for the other heat-exchange medium also being formed by paired plates touching each other
    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/04—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being formed by spirally-wound plates or laminae

Definitions

  • the invention relates to a gas boiler.
  • Boilers of the type mentioned are generally known and in use, so that no special printed evidence is required in this regard.
  • the secondary heat exchangers have different constructions, e.g. in the form of several pockets arranged parallel to one another, around which the heating water flows, or in the form of so-called lamella blocks formed from one or more pipes, the lamellas being the outer ribs of the pipes form.
  • the hot water is usually prepared in separate hot water tanks and those of the second type, which are generally of a lower capacity, by using pipes in the hot water pipes through which the warming process water is passed through, the heating water must be at a high temperature, but this is associated with a strong tendency to calcification.
  • the invention is based on the task of creating a boiler which takes these trends into account and can be dimensioned correspondingly small and compact, with the secondary heat exchanger in particular not only being simple and rational producible, but should also be easy to integrate into the boiler or the boiler housing with a high concentration and optimal flowability of the heat transfer surface.
  • the exhaust gas collection chamber equipped with the secondary heat exchanger is sealed and releasably assigned to the water-carrying housing, the connection between the housing and the exhaust gas collection chamber being established by means of turnbuckles.
  • the exhaust gas collection chamber with the plane spiral is simply welded to the water-bearing housing.
  • the outflow connection of the secondary heat exchanger can be connected to the water-carrying interior of the housing, the heating return being connected to the inside of the plane spiral.
  • the spiral coil serves as an additional heating surface for heating the heating water.
  • the plane spiral it is also possible to use the plane spiral as a instantaneous water heater.
  • the secondary heat exchanger can, however, also be formed from two pockets through which one can flow independently of one another, one of which is connected to the water-carrying interior of the housing and the other of which is connected to process water supply -discharge connections is provided, the two pockets being arranged one behind the other in relation to the axial gas flow direction.
  • the secondary heat exchanger connected to the water-bearing interior of the housing is double-stranded and to arrange a third strand with the hot water supply and drain connections between these two strands, which are in flat thermal conduction on both sides.
  • the heat transfer to the process water does not take place directly through the heating gases, but indirectly through the heating water which flows through the strands adjacent to the process water line on both sides.
  • an embodiment is preferred in such a way that the exhaust gas collection chamber is arranged under the water-carrying housing, which is formed with the combustion chamber in the form of an elbow or arc piece and the burner is arranged with its axis oriented perpendicular or inclined to the winding axis of the secondary heat exchanger (s).
  • the formation of water-carrying housings with the associated combustion chamber in the form of an elbow or elbow is known per se, but is of particular importance in the present context, since this further increases the compactness of the entire boiler and places the burner relatively close to the plane spiral leaves.
  • the burner used here is not a flat gas burner (radiation burner), but one that is preferably used, the effective burner surface of which has, for example, a hemisphere or ellipsoid shape, i.e. a burner that not only against the water-cooled walls of the housing, but also directly against the spiral that forms the secondary heat exchanger takes effect.
  • the gas boiler basically and in a known manner consists of a water-carrying housing 1 in which a combustion chamber 3 equipped with a burner 2 and between this and the exhaust connection piece 4 of an exhaust gas collection chamber 5 one of the Post-flow heat exchanger NT through which heat can flow is arranged with inflow and outflow connections 6, 7 for the medium to be heated.
  • the at least one post-heat exchanger NT is designed in the form of a pocket 9 which is axially gas-flowable and spirally wound between two parallel planes E and whose cross-sectional width B is substantially larger in cross-sectional main axis HA parallel to the winding axis WA and the secondary heat exchanger NT arranged in the uncooled exhaust gas collection chamber 5 and this is assigned to the water-carrying housing 1 as a separate structural unit, the total cross section of the secondary heat exchanger NT flowed by the heat-supply medium essentially corresponding to the opening cross section 8 of the combustion chamber 3 which is open to the secondary heat exchanger NT and circular in cross section.
  • FIG. 1 shows the preferred embodiment in which the exhaust gas collecting chamber 5 is releasably and releasably associated with the water-carrying housing 1 with the interposition of an annular seal 18, the two parts being held together by turnbuckles 16.
  • the plane spiral or the pocket 9 wound into a spiral in the sense of FIG. 2 serves as NT for passing the heating return, which is connected to the inflow connection 6 and after passage of the plane spiral from the center through a line piece 17 into the Interior 10 of the housing 1 arrives and heats it out through the outflow connection 7 (flow).
  • the inflow connection 6 is the cold water connection
  • the outflow connection 7 sits instead of the line section 17 directly on the planned spiral and serves as a hot water discharge connection from which the hot water can either be tapped directly or via a process water buffer store (not shown) .
  • FIG. 3 An embodiment such that the post-heat exchanger NT is formed from two pockets 9, 9 'through which air can flow independently of one another, one of which is connected to the water-carrying interior 10 of the housing 1 and the other 9' with process water supply and discharge connections 6 ', 7 ', the two pockets 9, 9' being arranged one behind the other in relation to the axial gas flow direction, is illustrated in FIG. 3. As shown by arrows, the lower pocket 9 is used for heating the returning heating water and the upper pocket 9 'for that of the process water.
  • FIG. 9 A special embodiment of the plane spiral is shown in section in FIG. 9. Thereafter, the secondary heat exchanger NT, which is connected to the water-carrying interior 10 of the housing 1, is double-stranded and between these two strands 11, which is in flat thermal contact on both sides, is a third strand 12 arranged with the hot water supply and discharge connections 6 ', 7'. All three strands 11, 12 are wound together into a spiral.
  • the heat transfer to the process water or the process water-carrying pocket does not take place directly through the heating gas, but rather through heat-conducting contact of the pockets 9 lying flat on both sides of the pocket 9 '.
  • the water-carrying housing 1 is, as it were, saddled onto the exhaust gas collection chamber 5 containing the plane spiral or plane spirals, ie, the Exhaust gas collecting chamber 5 is arranged under the water-carrying housing 1, which is formed with the combustion chamber 3 in the form of an angle or arc piece 13, 13 'and the burner 2 is arranged with its axis 14 oriented perpendicular or inclined to the winding axis 15 of the post-heat exchanger NT.
  • burners those with the shapes shown are used, the effective burner surface of which consists of metal mesh.
  • the burner acts with its heat radiation not only directly against the water-cooled walls of the housing 1, but also against the spiral, and the boiler has small height dimensions.
  • the boilers shown in FIGS. 1 to 5 are only twice as large as shown.
  • the inner wall 20 which is bent at the top and bottom with respect to the winding axis 15, has edges 22 corresponding to the width B of the water-carrying interior space 21 .
  • the outer wall 23 has inwardly bent edges 24 with a maximum half width B, which edges 24 overlap the edges 22 of the inner wall 20 or are flush with them and are connected to them in a liquid-tight manner.
  • Wave embossments 27 of both walls 20, 23 pointing into the gas-carrying interior 25 ', which is open on the inflow and outflow sides, are arranged and designed to be mutually supportive, at a distance D from the edges 22, 24 in the walls 20, 23, essentially parallel to the winding axis 15, and the water-carrying interior 25 is closed at both ends of the plane spiral except for the attached supply and return connection openings.
  • Such a NT is shown in plan view according to FIG. 2, from which it can also be seen that the inner winding end of the spiral naturally does not begin in the center of the spiral, but on a filler body 26, which can also be designed as a hollow body and forms the return connection . A winding from the center is not allowed because the bending radii would be too small.
  • the inner wall 20 is provided with a central wave embossing 27 extending perpendicular to the winding axis 15, the depth of which corresponds to the width B of the water-carrying Interior 25 corresponds.
  • This wave embossing 27 supports the wall 23 in the middle and divides the water-bearing interior 25, so that it flows through the filler body 26 (return connection) from in two corresponding spiral parallel flows and passes from the two openings into the water-bearing interior 10 of the boiler.
  • the heating gases entering the NT from the combustion chamber 3 of the boiler flow through the gas-carrying interior 25 ', which is open on both sides, parallel to the winding axis 15.
  • This configuration of the pocket 9 allows it to be continuously wound and welded, and is then surrounded with an adapted cladding sheet 19 and thus inserted into the exhaust gas collection chamber 5, the cladding sheet 19 (see FIGS. 1 to 6) advantageously facilitating installation in the exhaust gas collection chamber 5.
  • the design and manufacture of the flat spirals are always the same, regardless of whether the flat spiral is used to pass heating water or process water.
  • the NT is also to be used for heating domestic water, as already described for FIG. 9, this consists in a preferred embodiment according to FIG. 10 in that the spirally wound pocket 9 is formed from two pocket parts 9 ', with their mutually facing flanks 28 delimit a service water channel 29, the two pocket parts 9 'in cross-sectional profile being of identical shape except for the upstream and downstream closing edges 30.
  • flanks 28 of the two pocket parts 9 'delimiting the process water channel 29 are, as shown, provided at their edges with mutually directed and welded upper and lower closures of the process water channel 29 forming bead embossments 31.
  • a weld seam made of additional welding material (not shown) is laid in the gusset 31 ′ thereby given.
  • the gas-charged flanks F of the two pocket parts 9 ' are provided with groove impressions 32 extending in the winding direction, with profile-matched spacer wires 33 being arranged between the groove impressions 32 of the adjacent flank F.
  • the groove embossments 32 have a much smaller depth than the wave embossments 27 of the gas-charged flanks F, because otherwise the heating gas passage would be prevented. Since the wave embossings 27 have a relatively small height of only 3 to 4 mm with a sheet thickness of about 0.8 to 1 mm, the gas passage cross section of the entire spiral would be too small in this compact design, ie that one could in this way by the arrangement of the Spacer wires, without having to increase the height of the wave embossments, would have to increase the gas passage cross section accordingly. Apart from that, the spacer wires lead to an improved gas swirl.
  • flanks WF of the two pocket parts 9' on the winding axis side are in each case centered and with one to the adjacent one water-side wall W recessed and extending in the winding direction support embossing.
  • closure edges 30 are, as shown, formed, that is, they are provided with short, outwardly directed bends 31 '' which, after the walls involved have been brought together during winding, are simply melted down without filler material, thereby avoiding exposed protruding connecting edges would be particularly disadvantageous on the gas inflow side.
  • This embodiment is also preferred in all of the other embodiments of the NT described above.
  • gas outlet openings 40 are arranged on the cladding sheet metal, to which at least one adjustable closing screen 41 is assigned on the outside of the cladding sheet metal 19, "at least one "includes the basic possibility of equipping each of the gas outflow openings 40 with a separate closing panel, which would, however, involve considerable effort. Otherwise, the gas outflow openings 40 can also be arranged along at least two circumferential surface lines 42, which is not particularly shown, since it is readily conceivable.
  • FIG. 12B An embodiment according to FIG. 12B is preferred in which the closing panel 41 is designed in the form of a ring 44 which can be adjusted parallel to the sheathing plate axis 43.
  • the gas outflow openings 40 are formed as slots 45 that are parallel to the axis of the sheathing plate 43 and the annular closing diaphragm 41 that is adjustable on the axis of the sheathing plate 19 has a width B that corresponds to the length L of the slots 45 .
  • the directions of displacement or adjustment of the closing panels are indicated by arrows P.
  • the embodiment according to FIG. 12 E has the peculiarity that, apart from total closure (shown) or opening of the slots 45, depending on whether the closing panel 41 (indicated by dashed lines) is moved up or down, exhaust gas from the peripheral flow gap 46 can flow further up or down from the envelope 19 directly into the exhaust gas collection chamber.
  • This axially parallel displaceability of the closing panel takes into account the simplest of all the shape of the cladding sheet 19 illustrated in FIG. 11, which results from the spiral shape of the pocket forming the plane spiral.
  • FIG. 12 C it is also possible according to FIG. 12 C to design the closing diaphragm 41 in the form of a ring 44 ′′ rotatable about the cladding sheet 19 and to provide the latter with the gas outflow openings 40 of the cladding sheet 19 in the form and arrangement of corresponding through-flow openings 40 ′.
  • the step 19 '(see FIG. 11) on the cladding sheet 19 does not constitute an obstacle to rotation since, for example, the ring 44' 'can also be designed as a radially expandable sleeve and adjusted, and then tightened again.
  • At least one fixing element 47 for which, for example, a simple small self-tapping screw is sufficient.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Gas Separation By Absorption (AREA)
  • Treating Waste Gases (AREA)
  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Details Of Fluid Heaters (AREA)
EP93109912A 1992-08-17 1993-06-22 Gasheizkessel Expired - Lifetime EP0583574B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE9210972U 1992-08-17
DE9210972U DE9210972U1 (de) 1992-08-17 1992-08-17 Gasheizkessel
DE4229146 1992-09-01
DE19924229146 DE4229146C1 (de) 1992-09-01 1992-09-01 Gasheizkessel

Publications (2)

Publication Number Publication Date
EP0583574A1 EP0583574A1 (de) 1994-02-23
EP0583574B1 true EP0583574B1 (de) 1995-12-13

Family

ID=25918114

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93109912A Expired - Lifetime EP0583574B1 (de) 1992-08-17 1993-06-22 Gasheizkessel

Country Status (5)

Country Link
EP (1) EP0583574B1 (da)
AT (1) ATE131591T1 (da)
DE (1) DE59301157D1 (da)
DK (1) DK0583574T3 (da)
ES (1) ES2080560T3 (da)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPP410598A0 (en) * 1998-06-15 1998-07-09 Aos Pty Ltd Heat exchangers
KR101717094B1 (ko) * 2015-07-23 2017-03-27 주식회사 경동나비엔 열교환기

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1753242A1 (de) * 1968-03-07 1971-07-15 Hans Viessmann Heizkessel,insbesondere fuer die Verwendung von gasfoermigen Brennstoffen
EP0028830A1 (de) * 1979-11-12 1981-05-20 Huber, Markus Gerätebau Zentralheizungskessel mit spiralförmigen, stufenlos verstellbaren Heizflächen und von Aussen bedienbarer Reinigung
EP0123995A1 (de) * 1983-04-27 1984-11-07 Etablissement Agura Kondensatheizkessel mit einem spiralförmigen Wärmeaustauschteil
DE3613103A1 (de) * 1986-04-18 1987-10-22 Hans Weiss Anordnung zur waermeuebertragung in einem waermeerzeuger

Also Published As

Publication number Publication date
EP0583574A1 (de) 1994-02-23
DE59301157D1 (de) 1996-01-25
ATE131591T1 (de) 1995-12-15
DK0583574T3 (da) 1996-01-29
ES2080560T3 (es) 1996-02-01

Similar Documents

Publication Publication Date Title
EP1979696B1 (de) Heizgerät
EP2440855A2 (de) Gliederheizkessel
EP0576963A1 (de) Nachschaltwärmetauscher für den Einbau in Heizkesselgehäuse
EP0583574B1 (de) Gasheizkessel
EP2157382A2 (de) Heizgerät
DE4229146C1 (de) Gasheizkessel
DE102007010585A1 (de) Wasserregister für einen Ofen, Wärmetauscher hierfür, sowie Verfahren zu deren Herstellung
DE3205121C2 (de) Heizungskessel
DE2107108A1 (de) Gliederkessel mit einer im unteren Teil untergebrachten Brennkammer
EP0120435B1 (de) Heizgaszugausbildung an Heizungskesseln
DE19505235B4 (de) Brennwertkessel
EP0387628B1 (de) Heizungskessel
EP0632239A1 (de) Heizgaszug
DE4316323C2 (de) Gasheizkessel
DE3205120C2 (de) Wandausbildung für Heizungskessel zum Verbrennen flüssiger oder gasförmiger Brennstoffe
DE3046454A1 (de) Heizungskessel
DE9409348U1 (de) Gasheizkessel
DE3205122A1 (de) Heizungskessel fuer fluessige oder gasfoermige brennstoffe
WO1994017338A1 (de) Heizkessel
AT221259B (de) Rohrförmiges Wärmetauscherelement
WO2000009959A1 (de) Heizkessel
DE2751978A1 (de) Heizungskessel
DE19548084A1 (de) Heizkessel
DE1912629C3 (de) Verbrennungskammer für einen Wassererhitzer
DE3212349C2 (de) Niedertemperatur-Heizungskessel

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 DK ES FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19931228

17Q First examination report despatched

Effective date: 19950428

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 DK ES FR GB IT LI NL SE

REF Corresponds to:

Ref document number: 131591

Country of ref document: AT

Date of ref document: 19951215

Kind code of ref document: T

ET Fr: translation filed
REF Corresponds to:

Ref document number: 59301157

Country of ref document: DE

Date of ref document: 19960125

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2080560

Country of ref document: ES

Kind code of ref document: T3

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: SCHMAUDER & WANN PATENTANWALTSBUERO

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

Effective date: 19960321

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: BE

Payment date: 19990526

Year of fee payment: 7

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

Ref country code: NL

Payment date: 19990603

Year of fee payment: 7

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

Ref country code: ES

Payment date: 19990609

Year of fee payment: 7

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

Ref country code: GB

Payment date: 19990614

Year of fee payment: 7

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

Ref country code: SE

Payment date: 19990617

Year of fee payment: 7

Ref country code: CH

Payment date: 19990617

Year of fee payment: 7

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

Ref country code: DK

Payment date: 19990625

Year of fee payment: 7

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

Ref country code: FR

Payment date: 19990629

Year of fee payment: 7

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

Ref country code: AT

Payment date: 19990630

Year of fee payment: 7

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: 20000622

Ref country code: DK

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

Effective date: 20000622

Ref country code: AT

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

Effective date: 20000622

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: 20000623

Ref country code: ES

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

Effective date: 20000623

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: 20000630

Ref country code: CH

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

Effective date: 20000630

Ref country code: BE

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

Effective date: 20000630

BERE Be: lapsed

Owner name: VIESSMANN HANS

Effective date: 20000630

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: 20010101

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

Effective date: 20000622

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

EUG Se: european patent has lapsed

Ref document number: 93109912.1

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

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: 20010228

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

Effective date: 20010101

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: 20010704

Year of fee payment: 9

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20020204

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: 20030101

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;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: 20050622