EP2060855B1 - Water circulation pipe with a connecting piece and method for assembling such a water circulation pipe - Google Patents
Water circulation pipe with a connecting piece and method for assembling such a water circulation pipe Download PDFInfo
- Publication number
- EP2060855B1 EP2060855B1 EP20070405325 EP07405325A EP2060855B1 EP 2060855 B1 EP2060855 B1 EP 2060855B1 EP 20070405325 EP20070405325 EP 20070405325 EP 07405325 A EP07405325 A EP 07405325A EP 2060855 B1 EP2060855 B1 EP 2060855B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- water
- pipe
- inner circulation
- circulation pipe
- circulation line
- 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.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 34
- 238000000034 method Methods 0.000 title claims description 3
- 238000009434 installation Methods 0.000 claims description 5
- 238000005553 drilling Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D17/00—Domestic hot-water supply systems
- F24D17/0078—Recirculation systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D17/00—Domestic hot-water supply systems
- F24D17/0078—Recirculation systems
- F24D17/0084—Coaxial tubings
Definitions
- the invention relates to a water circulation line with a closure piece according to the preamble of claim 1.
- the invention is based on the object to provide a water circulation pipe with a closure piece of the type mentioned, which allows for easier installation and / or is less expensive to produce.
- the inventive end piece is particularly suitable in connection with a connector according to the European patent EP 20 23 058 ,
- the end piece can then be made and mounted particularly cost-effective, if it has, according to a development of the invention, an elastic support member which can be tensioned against the inside of the riser.
- the support member is in this case preferably designed as an elastic retaining tab, for example as a ring or as a clip.
- the insert during assembly with the inner circulation tube can be pulled down from a housing of the connection piece.
- This allows mounting, in which the tubular and flexible inner circulation tube can be pulled from above into the riser.
- With the attached end piece can then be pulled out of the housing of the connector down the inner circulation tube at its lower end by a certain length.
- the insert can now be placed on the lower end of the inner circulation tube and finally pushed up and attached to the housing of the connector.
- the end piece is moved up or down in this assembly accordingly.
- the FIG. 1 shows a water circulation line 1, which has a connection piece 20 at a lower end, to which a supply line 2, a riser pipe 3 and an inner circulation pipe 4 are connected.
- the supply line 2 is connected to a hot water boiler not shown here a heating system. Through this supply line 2 and through a passage 19 in port 20, the riser 3 hot water can be supplied.
- the riser 3 leads, for example, from a basement through a building floor 5 upwards over several floors of a building, not shown here. In each floor, the riser 3 may be connected via a respective tee 6 with a line 7, to which, for example, a faucet is connected. In the FIG. 1 only one tee 6 is shown. In general, however, several such T-pieces 6 are connected to the riser pipe 3 according to the number of floors.
- the insert 14 has an upwardly projecting connection piece 11, to which the lower end of the inner circulation tube is connected.
- the connection between the connecting piece 11 and the lower end of the inner circulation line 4 can be arbitrary per se. This is preferably a screw connection. It is also conceivable, for example, a press connection.
- the insert 14 is thus preferably screwed from below into the inner circulation tube 4.
- the first branch 16a of the passage 16 extends vertically. At the lower end of this branch 16a, the water flowing through is deflected by 90 ° degrees and then runs horizontally in the second branch 16b in the return line 4b.
- the riser 3 is connected at its lower end with an upwardly projecting connection piece 10 with the housing 13.
- the connecting piece 10 may be provided for a press connection.
- the inner circulation tube 3 is preferably made of plastic and flexible. At its upper end 4a, the inner circulation pipe 4 is supported by the end piece 25 at the upper end 31 of the riser pipe 3.
- the end piece 25 has a support part 26 and a connecting part 27.
- the connecting part 27 has on the outside a screw thread not shown here, so that the connecting piece 25 can be screwed from above through the opening 8 in the end 4a.
- the diameter of the connecting part 27 is slightly larger than the inner diameter of the inner circulation tube 4. When screwing in the connecting part 27 thus the upper end 4a is slightly stretched.
- the said channel 28 which is connected to the transverse bore 29 extends. Water can thus pass through the transverse bore 29 from two sides into the channel 28 and in this down into the inner circulation tube 4.
- the support member 26 is annular and elastic. He is also trained to be in the in FIG. 1 shown inserted state elastically tensioned on the inside of the riser pipe 3. Due to this tension, the end piece 25 is fixed in the riser pipe 3 and thus the inner circulation pipe 3 is supported at the upper end 4a. With a predetermined force, however, the end piece 25 can be moved in the riser 3 up and down. The connection of the end piece 25 with the riser pipe 3 is thus a frictional connection. The end piece 25 can thus be moved continuously in the riser 3. In each position, the end piece 25 is fixed by the tension of the support member 26.
- the upper end 31 of the riser pipe 3 is connected to a fitting 30, for example, an elbow with a conduit 32 shown only partially here, which can also lead to a consumer.
- end piece 25 ' differs from the above-described end piece 25 in that it is designed as a top open clip.
- the end piece 25 ' is also elastic and can be moved vertically with the inner circulation tube 4.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Domestic Plumbing Installations (AREA)
- Supports For Pipes And Cables (AREA)
Description
Die Erfindung betrifft eine Wasserzirkulationsleitung mit einem Abschlussstück nach dem Oberbegriff des Anspruchs 1.The invention relates to a water circulation line with a closure piece according to the preamble of
Ein Abschlussstück ist im Stand der Technik aus der
Ein weiteres Abschlussstück dieser Art ist im Stand der Technik aus der
Der Erfindung liegt die Aufgabe zu Grunde, eine Wasserzirkulationsleitung mit einem Abschlussstück der genannten Art zu schaffen, das eine einfachere Montage ermöglicht und/oder kostengünstiger herstellbar ist.The invention is based on the object to provide a water circulation pipe with a closure piece of the type mentioned, which allows for easier installation and / or is less expensive to produce.
Die Aufgabe ist gemäss Anspruch 1 gelöst. Das Abschlussstück der Wasserzirkulationsleitung wird nicht durch verschrauben oder mit einem Flansch am Steigrohr befestigt, sondern wird lediglich mit einem Klemmteil gleitbar und somit schwimmend im Steigrohr angeordnet. Die Verbindung ist somit reibschlüssig, so dass ein aufwändiges Verschrauben oder anderweitiges mechanisches Verbinden mit dem Steigrohr nicht erforderlich ist. Das Abschlussstück kann sehr einfach und einstückig hergestellt werden. Insbesondere kann das Abschlussstück als einstückiges Kunststoffteil hergestellt werden. Die Montage ist sehr einfach, da das in das Steigrohr eingeführte Innenzirkulationsrohr im Steigrohr verschiebbar ist. Eine Wasserzirkulationsleitung kann deshalb mit diesem Abschlussstück von einem einzigen Monteur einfach und dennoch sicher montiert werden.The problem is solved according to
Vorteilhaft ist zudem, dass aufgrund der schwimmenden Lagerung des Abschlussteils im Steigrohr Längenänderungen durch Verschieben des Abschlussstücks im Steigrohr aufgenommen werden können. Spannungen und Geräusche können damit vermieden werden.It is also advantageous that due to the floating mounting of the end part in the riser length changes can be accommodated by moving the end piece in the riser. Tensions and noises can be avoided.
Das erfindungsgemässe Abschlussstück eignet sich insbesondere in Verbindung mit einem Anschlussstück gemäss dem europäischen Patent
Das Abschlussstück kann dann besonders kostengünstig hergestellt und montiert werden, wenn es gemäss einer Weiterbildung der Erfindung einen elastischen Stützteil aufweist, der gegen die Innenseite des Steigrohres spannbar ist. Der Stützteil ist hierbei vorzugsweise als elastische Haltelasche, beispielsweise als Ring oder als Klammer ausgebildet.The end piece can then be made and mounted particularly cost-effective, if it has, according to a development of the invention, an elastic support member which can be tensioned against the inside of the riser. The support member is in this case preferably designed as an elastic retaining tab, for example as a ring or as a clip.
Nach einer Weiterbildung der Erfindung ist vorgesehen, dass der Verbindungsteil als schraubbarer Teil ausgebildet ist, der in das obere Ende der Innenzirkulationsleitung einschraubbar ist. Das Abschlussstück kann somit in einfacher weise mit dem Innenzirkulationsrohr verbunden werden. Klemmen oder dergleichen sind nicht erforderlich.According to a development of the invention, it is provided that the connecting part is designed as a screwable part which can be screwed into the upper end of the inner circulation line. The End piece can thus be easily connected to the inner circulation tube. Clamps or the like are not required.
Nach einer Weiterbildung der Erfindung ist vorgesehen, dass der Verbindungsteil einen Kanal aufweist, durch den Wasser von Aussen in das Innenzirkulationsrohr fliessen kann. Vorzugsweise ist dieser Kanal mit einer Querbohrung verbunden. Das Wasser kann dann vom Steigrohr durch die Querbohrung in den genannten Kanal und durch diesen in das Innenzirkulationsrohr gelangen.According to a development of the invention it is provided that the connecting part has a channel through which water can flow from the outside into the inner circulation tube. Preferably, this channel is connected to a transverse bore. The water can then pass from the riser through the transverse bore in the said channel and through this in the inner circulation tube.
Bei der Wasserzirkulationsleitung mit dem Abschlussstück ist vorzugsweise vorgesehen, dass die Wasserzirkulationsleitung an einem unteren Ende an ein Anschlussstück angeschlossen ist, das einen Einsatz aufweist, der mit dem unteren Ende des Innenzirkulationsrohres verbunden ist.In the water circulation pipe with the end piece, it is preferably provided that the water circulation pipe is connected at a lower end to a fitting having an insert connected to the lower end of the inner circulation pipe.
Gemäss einer Weiterbildung der Erfindung ist vorgesehen, dass der Einsatz bei der Montage mit dem Innenzirkulationsrohr nach unten aus einem Gehäuse des Anschlussstücks herausziehbar ist. Dies ermöglicht eine Montage, bei welcher das schlauchförmige und flexible Innenzirkulationsrohr von oben in das Steigrohr eingezogen werden kann. Mit dem aufgesetzten Abschlussstück kann dann das Innenzirkulationsrohr an seinem unteren Ende um eine bestimmte Länge aus dem Gehäuse des Anschlussstücks nach unten herausgezogen werden. Der Einsatz kann nun auf das untere Ende des Innenzirkulationsrohres aufgesetzt und schliesslich nach oben geschoben und am Gehäuse des Anschlussstücks befestigt werden. Das Abschlussstück wird bei dieser Montage entsprechend nach oben bzw. nach unten verschoben. Dieses Verfahren ermöglicht eine einfache und dennoch sichere Einmannmontage einer Wasserzirkulationsleitung.According to a development of the invention it is provided that the insert during assembly with the inner circulation tube can be pulled down from a housing of the connection piece. This allows mounting, in which the tubular and flexible inner circulation tube can be pulled from above into the riser. With the attached end piece can then be pulled out of the housing of the connector down the inner circulation tube at its lower end by a certain length. The insert can now be placed on the lower end of the inner circulation tube and finally pushed up and attached to the housing of the connector. The end piece is moved up or down in this assembly accordingly. This method allows a simple yet safe one-man installation of a water circulation pipe.
Ausführungsbeispiele der Erfindung werden nachfolgend anhand der Zeichnung näher erläutert. Es zeigen:
Figur 1- Ein Vertikalschnitt durch eine Wasserzirkulationsleitung mit einem erfindungsgemässen Abschlussstück
- Figuren 2a-2e
- schematisch einzelne Schritte bei der Montage einer Wasserzirkulationsleitung und
Figur 3- einen Schnitt durch das obere Ende des Innenzirkulationsrohres mit einem Abschlussstück gemäss einer Variante.
- FIG. 1
- A vertical section through a water circulation pipe with an inventive end piece
- FIGS. 2a-2e
- schematically individual steps in the assembly of a water circulation pipe and
- FIG. 3
- a section through the upper end of the inner circulation tube with a closure piece according to a variant.
Die
Das Innenzirkulationsrohr 4 besitzt ein oberes Ende 4a mit einer Öffnung 8, in die ein Anschlussstück 25 eingesetzt und insbesondere eingeschraubt ist. Durch eine Querbohrung 29 und einen Kanal 28 im Abschlussstück 25 kann Wasser vom Steigrohr 3 in das Innenzirkulationsrohr 4 fliessen. Das im Innenzirkulationsrohr 4 nach unten strömende Wasser gelangt durch einen ersten Ast 16a und durch einen zweiten Ast 16b eines Einsatzes 14 in eine Rücklaufleitung 4b, die an einem Anschlussstutzen 12 mit einem Gehäuse 13 des Anschlussstückes 20 verbunden ist. Die Rücklaufleitung 4b ist an eine hier nicht gezeigte Pumpe angeschlossen, so dass das im Innenzirkulationsrohr 4 zirkulierende Wasser wieder dem Wasserboiler zugeführt werden kann. Ist die Pumpe ständig in Betrieb, so wird ein Strömungskreislauf aufrechterhalten, bei dem warmes Wasser im Steigrohr 3 nach oben strömt und dann durch das Abschlussstück 25 nach unten und durch einen Durchgang 16 in die Rücklaufleitung 4b und schliesslich wieder in den Warmwasserboiler gelangt. Damit kann erreicht werden, dass auch bei einem hohen Gebäude mit mehreren Etagen in jeder Etage im Wesentlichen sofort Warmwasser zur Verfügung steht. Der Wärmeverlust kann vergleichsweise klein gehalten werden.The
Das Gehäuse 13 des Anschlussstücks 20 ist beispielsweise aus einem geeigneten Metall hergestellt und besitzt eine Bohrung 15, in welche der Einsatz 14 von unten eingesetzt ist. Mit einer Dichtung 18 ist dieser Einsatz 14 gegenüber dem Gehäuse 13 abgedichtet. Mittels einer Mutter 17, welche in die Bohrung 15 eingeschraubt ist, ist der Einsatz 14 lösbar am Gehäuse 13 befestigt. Ist die Mutter 17 aus dem Gehäuse 13 herausgeschraubt, so kann der Einsatz 14 frei nach unten aus dem Gehäuse 13 herausgezogen werden.The
Der Einsatz 14 besitzt einen nach oben ragenden Anschlussstutzen 11, an den das untere Ende des Innenzirkulationsrohres angeschlossen ist. Die Verbindung zwischen dem Anschlussstutzen 11 und dem unteren Ende der Innenzirkulationsleitung 4 kann an sich beliebig sein. Vorzugsweise ist dies eine Schraubverbindung. Denkbar ist aber auch beispielsweise eine Pressverbindung. Der Einsatz 14 ist somit bevorzugt von unten in das Innenzirkulationsrohr 4 eingeschraubt. Der erste Ast 16a des Durchganges 16 verläuft vertikal. Am unteren Ende dieses Astes 16a wird das durchströmende Wasser um 90° Grad umgelenkt und verläuft dann in dem zweiten Ast 16b horizontal in die Rücklaufleitung 4b. Das Steigrohr 3 ist an seinem unteren Ende mit einem nach oben ragenden Anschlussstutzen 10 mit dem Gehäuse 13 verbunden. Der Anschlussstutzen 10 kann für eine Pressverbindung vorgesehen sein.The
Das Innenzirkulationsrohr 3 ist vorzugsweise aus Kunststoff hergestellt und flexibel. An seinem oberen Ende 4a wird das Innenzirkulationsrohr 4 durch das Abschlussstück 25 am oberen Ende 31 des Steigrohres 3 abgestützt. Das Abschlussstück 25 besitzt einen Stützteil 26 und einen Verbindungsteil 27. Der Verbindungsteil 27 besitzt aussenseitig ein hier nicht gezeigtes Schraubgewinde, so dass das Anschlussstück 25 von oben durch die Öffnung 8 in das Ende 4a eingeschraubt werden kann. Der Durchmesser des Verbindungsteils 27 ist etwas grösser als der Innendurchmesser des Innenzirkulationsrohres 4. Beim Einschrauben des Verbindungsteil 27 wird somit das obere Ende 4a etwas gedehnt. Im Verbindungsteil 27 verläuft der genannte Kanal 28, der mit der Querbohrung 29 verbunden ist. Wasser kann somit durch die Querbohrung 29 von zwei Seiten in den Kanal 28 und in diesem nach unten in das Innenzirkulationsrohr 4 gelangen.The
Der Stützteil 26 ist ringförmig ausgebildet und elastisch. Er ist zudem so ausgebildet, dass er in dem in
Das Anschlussstück 25 ist vorzugsweise einstückig aus Kunststoff hergestellt. Grundsätzlich könnten beispielsweise das Stützteil 26 und das Verbindungsteil 27 auch separat hergestellte Teile sein die miteinander verbunden, beispielsweise verschraubt sind. Beim Montieren bildet jedoch das Abschlussstück 25 eine Einheit.The connecting
Das obere Ende 31 des Steigrohres 3 ist mit einem Fitting 30, beispielsweise einem Winkelstück mit einem hier nur teilweise gezeigten Leitungsrohr 32 verbunden, das ebenfalls zu einem Verbraucher führen kann.The
Das in der
Anhand der
Für die Montage wird zuerst gemäss der
Nun wird das in das Steigrohr 3 eingezogene Innenzirkulationsrohr 4 gemäss
- 11
- WasserzirkulationsleitungWater circulation pipe
- 22
- Zulaufleitungsupply line
- 33
- Steigrohrriser
- 44
- InnenzirkulationsrohrInternal circulation pipe
- 4a4a
- Oberes EndeTop end
- 4b4b
- RücklaufleitungReturn line
- 55
- Gebäudebodenbuilding floor
- 66
- T-StückTee
- 77
- Leitungmanagement
- 88th
- Öffnungopening
- 99
- Erster AnschlussstutzenFirst connection piece
- 1010
- Zweiter AnschlussstutzenSecond connection piece
- 1111
- Dritter AnschlussstutzenThird connection piece
- 1212
- Vierter AnschlussstutzenFourth connection piece
- 1313
- Gehäusecasing
- 1414
- Einsatzcommitment
- 1515
- Bohrungdrilling
- 1616
- Durchgangpassage
- 16a16a
- Erster AstFirst branch
- 16b16b
- Zweiter AstSecond branch
- 1717
- Muttermother
- 1818
- Dichtungpoetry
- 1919
- Durchgangpassage
- 2020
- Anschlussstückconnector
- 2121
- Unterseitebottom
- 2525
- Abschlussstückterminating piece
- 2626
- Stützteilsupporting part
- 2727
- Verbindungsteilconnecting part
- 2828
- Kanalchannel
- 2929
- QuerborungQuerborung
- 3030
- Fittingfitting
- 3131
- Oberes Ende des SteigrohresUpper end of the riser
- 3232
- LeitungsrohrPipeline
- 3333
- Pfeilarrow
- 3434
- Pfeilarrow
- 3535
- Pfeilarrow
Claims (10)
- Water-circulation line (1) having a riser pipe (3), having a tubular inner circulation pipe (4), which is arranged in the riser pipe (3) in order to form, therewith, the water-circulation line (1) for a service-water or hot-water supply system, and having a termination component (25) for the tubular inner circulation pipe (4), this component having a connecting part (27), by way of which the termination component (25) is connected to the upper end (4a) of the inner circulation pipe (4), and a supporting part (26), by way of which the termination component (25) is supported on the riser pipe (3), characterized in that the supporting part (26) is designed in the form of a clamping part which is introduced into the riser pipe (3) and can be displaced therein in a slideable manner, and in that the supporting part (26) is connected to the riser pipe (3) with a frictional fit.
- Water-circulation line (1) according to Claim 1, characterized in that the supporting part (26) is designed in the form of a resiliently elastic tensioning part and is tensioned against the inside of the riser pipe (3).
- Water-circulation line (1) according to Claim 1 or 2, characterized in that the supporting part (26) is designed in the form of an elastic retaining lug and, in particular, in the form of a ring.
- Water-circulation line (1) according to one of Claims 1 to 3, characterized in that the supporting part (26) is designed in the form of a ring or in the form of an open clamp.
- Water-circulation line (1) according to one of Claims 1 to 4, characterized in that the connecting part (27) is designed in the form of a screw-fitting part, which is screwed into the upper end (4a) of the inner circulation pipe (4).
- Water-circulation line (1) according to one of Claims 1 to 5, characterized in that the connecting part (27) has a channel (28), through which water can flow into the inner circulation pipe (4).
- Water-circulation line (1) according to one of Claims 1 to 6, characterized in that the connecting part (27) has a transverse bore (29), through which water can flow into the inner circulation pipe (4) from outside.
- Water-circulation line according to one of Claims 1 to 7, characterized in that it is connected, at a lower end, to a connection component (20), which has an insert (14) which is connected to the lower end of the inner circulation pipe (4).
- Water-circulation line according to Claim 8, characterized in that, during installation, the insert (14) can be drawn downwards out of a housing (13) of the connection component (20) along with the inner circulation pipe (4).
- Method of installing a water-circulation line according to one of Claims 1 to 9, characterized in that the inner circulation line (4) is drawn into the riser pipe (3) from above, in that the inner circulation pipe (4), with the termination component (25) attached, is drawn downwards by a predetermined length out of the housing (13) of the connection component (20), then the insert (14) is attached to the lower end of the inner circulation pipe (4), and in that, finally, the inner circulation pipe (4) is pushed upwards in the riser pipe (3) and the insert (14) is fastened on the housing (13) of the connection component (20).
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20070405325 EP2060855B1 (en) | 2007-11-13 | 2007-11-13 | Water circulation pipe with a connecting piece and method for assembling such a water circulation pipe |
NO20083972A NO20083972L (en) | 2007-11-13 | 2008-09-18 | End piece of a hose-shaped intercircuit pipe, water circulation line with such an end piece and method for mounting such a water circulation line. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20070405325 EP2060855B1 (en) | 2007-11-13 | 2007-11-13 | Water circulation pipe with a connecting piece and method for assembling such a water circulation pipe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2060855A1 EP2060855A1 (en) | 2009-05-20 |
EP2060855B1 true EP2060855B1 (en) | 2014-07-09 |
Family
ID=39317257
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20070405325 Active EP2060855B1 (en) | 2007-11-13 | 2007-11-13 | Water circulation pipe with a connecting piece and method for assembling such a water circulation pipe |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2060855B1 (en) |
NO (1) | NO20083972L (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2385316A1 (en) * | 2010-05-08 | 2011-11-09 | CEC-System SA | Recirculation conduit for recirculating a fluid in a conduit system and method for providing a recirculation conduit |
SE541148C2 (en) * | 2016-10-18 | 2019-04-16 | Hammardal Bygg & Vvs Ab | System for hot water circulation and method therefore |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT388604B (en) | 1987-07-16 | 1989-08-10 | Holztrattner Heinrich | LIQUID OR GAS CIRCUIT, ESPECIALLY FOR A HOT WATER OR HEATING WATER SUPPLY SYSTEM |
DE4331194C1 (en) * | 1993-09-14 | 1994-10-06 | Braas Gmbh | Double-walled pipeline system |
DE19849362C2 (en) * | 1998-10-27 | 2002-10-02 | Kemper Gebr Gmbh & Co Kg | Pipe system for liquid media, especially for hot water circuits installed in buildings for the supply of process water |
DE29920286U1 (en) | 1999-11-18 | 2000-02-10 | Hage Fittings Gmbh & Co Kg | End piece for a hot water circulation pipe |
DE10054822A1 (en) * | 2000-11-04 | 2002-05-08 | Wolfgang Schmitter | Press fitting comprises coaxial pipes with conventional press collars at their ends, inner pipe carrying hot water and outer central heating water |
EP1880147A2 (en) * | 2005-04-14 | 2008-01-23 | McKeith, Lee | Central heating system |
-
2007
- 2007-11-13 EP EP20070405325 patent/EP2060855B1/en active Active
-
2008
- 2008-09-18 NO NO20083972A patent/NO20083972L/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
EP2060855A1 (en) | 2009-05-20 |
NO20083972L (en) | 2009-05-14 |
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