EP1926944A1 - Expansionsventil - Google Patents
ExpansionsventilInfo
- Publication number
- EP1926944A1 EP1926944A1 EP06777024A EP06777024A EP1926944A1 EP 1926944 A1 EP1926944 A1 EP 1926944A1 EP 06777024 A EP06777024 A EP 06777024A EP 06777024 A EP06777024 A EP 06777024A EP 1926944 A1 EP1926944 A1 EP 1926944A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- expansion valve
- connection
- valve according
- valve housing
- housing
- 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.)
- Withdrawn
Links
- 238000005057 refrigeration Methods 0.000 claims abstract description 16
- 238000004378 air conditioning Methods 0.000 claims abstract description 4
- 239000003507 refrigerant Substances 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 2
- 210000000056 organ Anatomy 0.000 abstract 2
- 239000002826 coolant Substances 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000008141 laxative Substances 0.000 description 1
- 230000002475 laxative effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
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
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
-
- 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
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
- F25B2309/061—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical 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
- F25B2341/06—Details of flow restrictors or expansion valves
- F25B2341/062—Capillary expansion valves
-
- 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
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
Definitions
- the invention relates to an expansion valve for a refrigeration system, in particular for a refrigerated system operated with CO 2 as a refrigerant, with a valve housing having a feed opening and a discharge opening, with an expansion element, which the feed opening or a fluid connection connected to the discharge opening or a so connected fluid connection, wherein a bypass valve is provided parallel to the expansion element.
- Such an expansion valve is known from EP 1 134 467 A1.
- This expansion valve is supplied on the high-pressure side compressed refrigerant from an inner heat exchanger via a supply line. From the expansion valve, a discharge line leads to the internal heat
- the leading from the inner heat exchanger to the expansion valve feed line and the laxative from the expansion valve to the inner heat exchanger discharge line is connected in each case via a screw connection to the valve housing.
- Such an expansion valve has the disadvantage that a relatively large space is required by the use of a housing block for the connection points of the supply line and discharge line to and from the expansion valve.
- a housing block on each of which a screw connection for a supply and a discharge line is provided, not be integrated into other components of the air conditioner.
- the ease of installation and compactness of the individual components are essential core requirements for the air conditioning system.
- very stringent legal requirements are imposed on the tightness of the system and the safe operation of refrigerant systems.
- the tightness of a system depends primarily on the number of joints.
- the invention is therefore based on the object to provide an expansion valve, by which reduces the number of connection points to the refrigeration system, the ease of installation increases and the compactness can be improved.
- the arrangement of the attachment section at one end of the valve housing has the advantage Part that a cartridge-shaped valve housing is provided which allows a compact arrangement and easy installation, especially since only one connection point is required to connect the expansion valve with a fluid connections having terminal block.
- the fastening portion is formed as a screw thread.
- the expansion valve is designed as Einschraubtechnik and can be easily assembled and disassembled or replaced.
- the supply and discharge openings are preferably arranged axially parallel. This allows a compact design and a simple structure to form a connection point on a terminal block.
- At least one seal is preferably provided at the front end of the valve housing. As a result, the high-pressure side is separated from the low-pressure side.
- At the connection-side end of the valve housing at least one seal between the feed opening and the attachment portion is provided.
- the seals can be provided on the front side at the end of the valve housing, whereby both seals are arranged within a connection point between the valve housing and the connection block.
- a seal for sealing the feed opening to the environment between the mounting portion and an outer periphery of the valve housing is provided.
- This seal engages an outer surface on the terminal block.
- This is an external seal, this seal provided in another plane is as the inner seal, which separates the feed opening to the discharge opening.
- the seals may preferably be formed as a cutting / clamping edge or by a pin which engages in a groove in which additionally a sealing ring may be provided.
- the cutting / clamping edge as a seal has the advantage that a simple assembly of the valve housing is given to the terminal block without additional components and their positionally correct positioning.
- the use of the sealing ring may be provided. This has the advantage that the so-called O-rings have long proven themselves and the tightening torque can be kept low.
- the sealing rings allow flexible construction by a radial and / or axial arrangement on or to the valve housing and terminal block.
- At least one seal for the supply opening for sealing against the atmosphere and at least one seal between the supply opening and the discharge opening in a plane at the connection end of the valve housing are provided.
- the feed opening has at least one through-bore at the connection-side end of the valve housing which, after the valve housing has been fixed to the connection block, is supplied by an annular channel into which a supply line in the connection block opens.
- the annular channel may be formed by the seals and an intermediate portion at the terminal-side end of the valve housing, by an annular recess in a terminal surface of the terminal block or by a combination.
- the valve housing is preferably constructed from a first and at least one further housing section, wherein their connection point are sealed against the environment.
- a first housing section which includes the connection-side end, can be fitted from behind with the individual components, so that then a simple closing is made possible.
- the connection point between the first and at least one further housing section is preferably hermetically closed by a welded connection.
- the multi-part housing preferably has a thread between the first and at least one further housing section.
- the valve housing preferably has at a connection-side end opposite end of a surface portion for mounting and dismounting of the expansion valve with a tool.
- This surface portion is used for applying a tool, so that the assembly easier and preferably a minimum necessary tightening torque is applied. At the same time can be ensured by applying a required tightening torque that the tightness of the system is given. In addition, the disassembly and replacement of an expansion valve is facilitated by such a surface section.
- the expansion valve preferably has a receiving section for a filter in the valve housing at the connection-side end, viewed in the flow direction, after the feed opening.
- the filter can be used in a simple manner in this receiving section.
- the filter is arranged in front of the feed opening in a receiving section provided for this purpose and the seals are arranged correspondingly adapted to the receiving section.
- an expansion element is preferably provided between the supply opening and discharge opening parallel to the valve closing member, which with a predetermined flow cross section connects the supply opening and discharge opening with each other.
- the expansion element can have a constant or variable flow cross-section.
- the fastening portion is formed as a flange.
- This flange is preferably arranged on the housing, whereby a simple and secure connection to the connection block is made possible by means of a screw connection.
- a part of the cartridge-shaped valve housing protrudes into the terminal block to allow a connection between the supply line and the opposite feed opening and discharge opening and the associated discharge line.
- valve housing is completely inserted into a terminal block and is fixed at a front end opposite the end with a releasable locking. This in turn creates a connection between the terminal block and the expansion valve to increase the tightness of the system.
- connection block is provided separately in a refrigeration system or as a section or part of a system component of the refrigeration system.
- the terminal block may be part of an evaporator or a connecting flange of connecting lines between the evaporator and the inner heat exchanger.
- FIG. 1 is a schematic enlarged sectional view of an expansion valve according to the invention in a refrigeration system shown schematically;
- FIG. 2 shows a schematic representation of a connection block with an inlet and outlet line and an expansion valve according to the invention
- FIG. 3a to c are schematic representations of an expansion valve according to the invention with alternative embodiments for the arrangement of seals and
- Figure 4a to c are schematic representations of various attachment portions of the expansion valve according to the invention for connection to a terminal block.
- FIG. 1 shows a refrigerant circuit 11 is shown, which is preferably operated with CO 2 as the refrigerant.
- a compressor 12 supplies compressed refrigerant on the high pressure side to an outdoor heat exchanger 14. This communicates with the environment and gives off heat to the outside.
- an inner heat exchanger 15 which supplies the refrigerant high-pressure side of an expansion valve 16 according to the invention via a feed line 17.
- an input pressure which may be up to 70 bar, for example, in summer 120 and in winter.
- the refrigerant flows through the expansion valve 16 and reaches the low-pressure side.
- the expansion valve 16 On the output side, the expansion valve 16 has pressures z. B. less than 60 bar.
- the discharged refrigerant through the pressure release passes into an evaporator 19 and extracts heat from the environment, whereby the cooling of a vehicle interior, for example, is achieved.
- the evaporator 19 is for example a collector 20 downstream.
- the vaporous refrigerant then flows through the inner heat exchanger 15 and reaches the compressor 12.
- connection block 21 may be formed as a separate component or as part of an evaporator 19 and as part or component of another component of the air conditioner 11.
- a supply port 23 is provided which leads to an expansion member 24 and the supply port 23 connects through a predetermined cross-sectional opening with a discharge opening 26.
- a bypass valve 27 is provided, which is in communication with a pressure chamber 28.
- the bypass valve 27 comprises a valve closure member 30 with an example spherical or conical closure body which closes in a valve seat in a closed position, a through hole 31.
- the valve closing member 30 is held by a return device 33 in a closed position.
- the restoring device 33 is formed for example by a spring element 34 such as a helical compression spring.
- the restoring device 33 furthermore comprises a bellows 36 or a membrane with a spring element, as described in DE 100 12 714 A1, to which reference is made in its entirety.
- the opening cross-section of the expansion element 24 is designed so that a basic mass flow can flow through the refrigeration system during compressor operation.
- the bypass valve 27 opens only from the exceeding of an adjustable or intended value of the high pressure to reduce an overpressure.
- the valve housing 22 of the expansion valve 16 has a fastening section 42 at a connection-side end 41 facing the connection block 21, via which the valve housing 22 can be connected to the connecting housing. block 21 is fixed.
- the attachment portion 42 is formed as a screw thread, so that a simple assembly and disassembly is possible.
- the design of the attachment portion 42 on the valve housing 22, through which the supply port 23 and discharge opening 26 are positioned together to the feed line 17 and discharge line 18, has the advantage that only one connection point or connection point is required, whereby the tightness of the refrigeration system 11 is increased.
- the supply port 23 and discharge opening 26 are provided axially parallel at the connection-side end 41 of the valve housing 22.
- a seal 44 is provided at the front end 41 of the valve housing 22.
- a seal 45 is provided at the front end 41 of the valve housing 22.
- the seals 44, 45 are preferably annular. These run, for example, according to Figure 1 coaxially to each other, whereby between the terminal block 21 and the supply port 23 of the valve housing 22, an annular channel 46 is formed.
- the compressed refrigerant can be distributed uniformly in the annular channel 46 and reach the pressure chamber 28 through one or more apertures which form the feed opening 23.
- the seals 44, 45 are formed for example as a cutting / clamping edge and are in the embodiment shown in Figure 1 preferably in a plane.
- these gaskets 44, 45 engage with a contact surface 48 of the terminal block 21 or at least partially dig into this to create a tight arrangement.
- By attaching the seals 44, 45 at the connection-side end 41 of the valve housing 22 lie the seals 44, 45 within the connection point.
- a stepped arrangement is provided so that these seals 44, 45 lie in different planes, but together when attaching the expansion valve 16 to the terminal block 21 achieve their sealing effect.
- O-ring seals are provided instead of the cutting / clamping edges, which are inserted, for example, in depressions of the contact surface 48, before the valve housing 22 is fastened to the connection block 21.
- Other arrangements and configurations of the seals are also possible.
- the valve housing 22 is designed in several parts and has a first housing section 51 and a further housing section 52.
- the seals 44, 45 are formed directly at the front end and the mounting portion 42.
- the first housing portion 51 comprises a receiving portion 54 for a filter 56 which can be used in this section 54.
- This receiving portion 54 may also be formed lying on the outside, so that before attaching the expansion valve 16 on the terminal block 21 of the filter 56 is inserted and positioned.
- a seal 45 may be provided which engages on an end face 59 of the terminal block 21.
- an outer seal is formed instead of the inner seal 44 or in addition to the seal 45 between the feed opening 23 and the attachment portion 42.
- the first and further housing sections 51, 52 are preferably held to one another via a screw connection. Before this screw is hermetically sealed by a weld, a Einjust ist done.
- a lid 61 may additionally be provided. Alternatively, the lid 61 may also be integrally connected to the further housing portion 52.
- the connection-side end 41 opposite to the valve housing 22, a surface portion 63 is provided which the attack of a tool for allows assembly and disassembly. As a result, the handling can be facilitated and the required torque can be applied. At the same time it is ensured that a tight connection point is created, since the seals 44, 45 are acted upon by a necessary contact force in order to achieve the sealing effect.
- the expansion valve 16 according to the invention according to FIG. 1 is designed as a screw-in unit with a single fastening section 42. Alternatively, it can also be provided that, for example, two separate attachment portions are provided, wherein a first attachment portion of the discharge opening 26 and a second attachment portion of the supply port 23 may be associated and yet only one connection point to the terminal block 21 is created.
- the expansion valve 16 may for example be directly attached and integrated in an evaporator or another component of the air conditioning system 11. Such an integration on the evaporator 19 can be done, for example, in the way that an additional block is soldered in or on an injection pipe of the evaporator 19. In this injection tube, the expansion valve 16 is then screwed as a cartridge. In this embodiment, as well as in the other, in addition, a low pressure rupture disc can be installed.
- FIG. 2 schematically shows a connection block 21 which accommodates the expansion valve 16 according to the invention.
- a supply line 17 is connected to the connection block 21.
- a discharge line 18 is soldered.
- the arrangement of supply line to the discharge line 18 is only an example.
- dashed line arranged discharge line 18 an alternative embodiment is shown to the arrangement.
- a solder connection or the like may also be provided.
- the feed line 17 and discharge line 18 described in FIG. 2 can also be fixed in the connection block 21 in an interchangeable manner.
- FIG. 1 further alternative embodiments for the arrangement of seals 44, 45 are shown to Figure 1.
- a seal 44 is provided at the front end 41 of the expansion valve 16, which is designed as a cutting edge or sealing ring. This seal 44 acts in the axial direction. Between the environment and an inboard end 41 of the expansion valve 16, a seal 45 is provided. This seal 45 acts in the radial direction. Preferably, sealing rings are used.
- the supply port 23 and the discharge port 26 can both be located at the front end 41 or 90 ° offset from each other, so that the supply port 23 is provided on a peripheral wall of the valve housing 22.
- the flow directions are indicated by the arrows.
- the front end is stepped, so that the feed opening 23 is located in a separate plane to the discharge opening 26.
- the seal between supply opening 23 and discharge opening 26 can be provided as a radial seal 44 as shown.
- an axial seal is possible on the front side.
- the seal 45 is provided adjacent to the supply port 23 as an axially acting seal. This can also act adjacent in the radial direction.
- the arrows show the flow directions for the supply and discharge of the refrigerant.
- FIG. 3c Another alternative embodiment of a front end 41 of the valve housing 22 of the expansion valve 16 is the stepped arrangement shown in Figure 3c.
- the seal 44 is arranged radially acting and the seal 45 provided axially acting. Any permutation as well as only a radial or only axial acting arrangement is also possible.
- the feed opening 23 and discharge opening 26 can be provided axially as well as radially aligned.
- FIGS. 4 a to c exemplary embodiments are provided for fastening the expansion valve 16 via only one connection point with a connection block 21.
- the frontal End 41 a pin 67 which engages, for example, in a bore of the discharge opening 16 and a pre-centering or additional centering of the valve housing 22 to the terminal block 21 allows.
- the pin 67 at the same time comprises the discharge opening 26.
- the feed opening 23 is provided.
- the arrangement of the expansion valve 16 is provided via a flange connection 71 to the connection block 21.
- a flange 72 is flush with an end face 59 of the terminal block 21 and is fixed by a screw connection.
- the front end 41 of the valve housing 22 may be arranged flush with the end face 59 or engage according to the embodiment in a recess. 4b corresponds, for example, to the arrangement of the feed and discharge openings 23, 26 of the embodiment according to FIG. 1.
- the front end 41 may also be stepped and comprise an arrangement according to FIGS. 3a to c ,
- FIG. 4 c shows a further alternative embodiment for arranging an expansion valve 16 for connection block 21.
- the valve housing 22 is fully inserted into the terminal block 21. Via a releasable lock 74, the valve housing is fixed to the connection block 21.
- the connections for the feed opening 23 and discharge opening 28 may be designed in accordance with the basic diagram or comprise the variants described above.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air-Conditioning For Vehicles (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005042448A DE102005042448A1 (de) | 2005-09-06 | 2005-09-06 | Expansionsventil |
| PCT/EP2006/008267 WO2007028499A1 (de) | 2005-09-06 | 2006-08-23 | Expansionsventil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1926944A1 true EP1926944A1 (de) | 2008-06-04 |
Family
ID=37259446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06777024A Withdrawn EP1926944A1 (de) | 2005-09-06 | 2006-08-23 | Expansionsventil |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1926944A1 (de) |
| DE (1) | DE102005042448A1 (de) |
| WO (1) | WO2007028499A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008031879A1 (de) * | 2008-07-08 | 2010-01-14 | Behr Gmbh & Co. Kg | Expansionsventil |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB677632A (en) * | 1948-03-10 | 1952-08-20 | Refrigerator Components Ltd | Improvements in or relating to expansion valves for use in refrigerators |
| JP4153133B2 (ja) * | 1999-05-11 | 2008-09-17 | 株式会社不二工機 | 膨張弁 |
| DE10012714A1 (de) * | 2000-03-16 | 2001-09-20 | Egelhof Fa Otto | Ventilanordnung einer Kälteanlage |
| JP4064762B2 (ja) * | 2001-09-07 | 2008-03-19 | 株式会社鷺宮製作所 | 絞り弁装置および空気調和機 |
| JP2004053182A (ja) * | 2002-07-23 | 2004-02-19 | Fuji Koki Corp | 膨張弁 |
| FR2858397B1 (fr) * | 2003-07-29 | 2005-12-23 | Valeo Climatisation | Dispositif pour l'adaptation d'un detendeur a l'evaporateur d'un appareil de climatisation |
-
2005
- 2005-09-06 DE DE102005042448A patent/DE102005042448A1/de not_active Withdrawn
-
2006
- 2006-08-23 EP EP06777024A patent/EP1926944A1/de not_active Withdrawn
- 2006-08-23 WO PCT/EP2006/008267 patent/WO2007028499A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2007028499A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102005042448A1 (de) | 2007-03-08 |
| WO2007028499A1 (de) | 2007-03-15 |
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Legal Events
| Date | Code | Title | Description |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| 17P | Request for examination filed |
Effective date: 20080407 |
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| AK | Designated contracting states |
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| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: BEHR GMBH & CO. KG |
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| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: WIEBELT, ACHIM Inventor name: GERKEN, THOMAS Inventor name: SICKELMANN, MICHAEL Inventor name: ROBIN, JEAN-JACQUES |
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| 17Q | First examination report despatched |
Effective date: 20081023 |
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| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
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| DAX | Request for extension of the european patent (deleted) | ||
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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| 18D | Application deemed to be withdrawn |
Effective date: 20110421 |