EP0934466B1 - Förderpumpe - Google Patents
Förderpumpe Download PDFInfo
- Publication number
- EP0934466B1 EP0934466B1 EP97910403A EP97910403A EP0934466B1 EP 0934466 B1 EP0934466 B1 EP 0934466B1 EP 97910403 A EP97910403 A EP 97910403A EP 97910403 A EP97910403 A EP 97910403A EP 0934466 B1 EP0934466 B1 EP 0934466B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- annular channel
- feed
- feed pump
- region
- channel
- 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
Links
- 230000006835 compression Effects 0.000 claims description 18
- 238000007906 compression Methods 0.000 claims description 18
- 230000001914 calming effect Effects 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 12
- 230000007704 transition Effects 0.000 claims description 2
- 239000000446 fuel Substances 0.000 description 27
- 239000007789 gas Substances 0.000 description 15
- 238000007872 degassing Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 2
- 238000005352 clarification Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D5/00—Pumps with circumferential or transverse flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D5/00—Pumps with circumferential or transverse flow
- F04D5/002—Regenerative pumps
Definitions
- the invention relates to a feed pump with a driven, in a pump housing rotating impeller, which at least one guide vanes delimiting a ring of vane chambers on its end faces has and with at least one in the area of the guide vanes the pump housing arranged partially annular channel, which with the vane chambers one for conveying a liquid from one Inlet channel up to an outlet channel provided delivery chamber forms and a compression area with a limited area Has angular range tapering cross-section.
- Such feed pumps are known as peripheral or side channel pumps and are often used to deliver fuel from a fuel tank used for an internal combustion engine of a motor vehicle.
- the guide vanes in the delivery chamber create a transverse to the Direction of movement of the guide blades circulating flow.
- the compression area serves to increase the pressure in the delivery chamber increase. This should cause gas bubbles present in the hot fuel vapor fuel in the liquid fuel by exceeding it of the vapor pressure condense. This is for example at a warm start of the motor vehicle important, since the temperature of the Fuel is particularly high and therefore very often gas bubbles through be sucked into the inlet duct. Cold fuel, which is usually none Contains gas bubbles, should also be pumped reliably with the feed pump become.
- Another fuel pump is known, which is between the inlet channel and the compression channel an area with a constantly changing cross-section has (DE 196 07 573 A1).
- the gas contained in the fuel is displaced guided radially inwards, collected in pockets and via a degassing hole dissipated.
- Another known fuel pump has an elongated steam channel, whose cross-section is reduced in the last section (US 5,284,4127).
- the Cross-sectional reduction is designed so that it leads to a degassing hole leads.
- the fuel-gas mixture in the elongated steam duct is led to the degassing hole in order to discharge the gas through this hole.
- Another feed pump has become known, in which the to the inlet channel adjacent area of the part-ring-shaped channel first a first area with a constant cross-section. At the end of this area is a degassing hole at the radially inner end of the partially annular channel incorporated into the pump housing. Then the Cross-section of the part-annular channel abruptly in order to keep the same Cross section to be led to the area of the outlet channel (US 4,591,311). The gas bubbles are not condensed in the fuel, instead they are to be discharged through the degassing hole. Because in The gas bubbles become the circulation flow in the first area entrained by the fuel and form one with the liquid fuel Foam.
- the proportion of gas bubbles in the fuel to be delivered is also temporal exposed to strong fluctuations, particularly in the area of abrupt Cross-sectional change of the part-ring-shaped channel a cavitation on Pump housing and thus a drop in the delivery rate of the delivery pump Consequence.
- the invention is based on the problem of a feed pump of the type mentioned Art to design so that gas bubbles present in the fuel particularly be reliably condensed and that there should be no cavitation in the area of the partially annular channel occurs.
- this problem is solved in that the partially ring-shaped Channel between the inlet channel and the compression area has a calming area with a constant cross-section.
- the one sucked in through the inlet channel passes Fuel first in the calming area, in which by the The turbulence introduced into the feed chamber subsides can. After the turbulence has subsided, the fuel arrives together with the gas bubbles in the compression area where the Gas bubbles reliably in when their vapor pressure is exceeded condense the fuel. Because the swirling of the fuel first be eliminated in the calming area. becomes the danger of cavitation the wall of the partially annular channel is kept as low as possible and a constant delivery rate of the delivery pump is ensured.
- the invention is particularly suitable for a feed pump, at the delivery chambers are arranged on both sides of the impeller, which for overflowing the liquid from one delivery chamber to the other Delivery chamber have a connection, the inlet channel in one delivery chamber and the other delivery chamber in the outlet channel empties.
- a feed pump is often used to achieve a high level Conveying capacity used in particularly small dimensions.
- the feed pump has according to an advantageous development of the invention a particularly high delivery rate for cold and warm fuel, if the partially annular channel of the delivery chamber opening into the outlet channel a continuous seen in the direction of movement of the guide vanes, themselves over essentially the same angular range as that Calming area of the partially annular channel of the other delivery chamber extending cross-sectional expansion.
- the gas bubbles in the fuel condense according to another advantageous one is particularly reliable in fuel if the compression range extends over an angular range of approximately 70 ° extends.
- the flow guide vane could be inserted separately into the inlet duct Component be formed.
- the feed pump exists according to another advantageous development from a particularly small number, Components to be manufactured inexpensively if the flow guide vane made in one piece with the pump housing and on the part-ring Channel facing away from the inlet channel is arranged.
- Fuel helps when the transition of the inlet duct to the calming area of the partially annular channel according to another advantageous Development of the invention on the flow guide vane opposite side is rounded.
- the partial ring-shaped can Duct air according to another advantageous Further development of the invention simply escape when the partial ring Channel at the end of the compression area on the pump housing penetrating vent hole.
- the cross-sectional expansion of the part-ring-shaped leading to the outlet channel Channel could, for example, by steadily deepening a constant width of the partially annular channel can be generated.
- this part-ring-shaped channel is formed advantageous development of the invention a circulation flow particularly quickly off when the cross-sectional expansion of the to the outlet channel leading partial annular channel by widening the partial annular Channel is generated. This will promote the Feed pump additionally increased.
- the delivery rate of the feed pump can be increased further if the Cross-sectional expansion by a seen in the flow direction radially inner boundary of the part-annular channel a simultaneous continuous deepening is generated.
- the circulation flow initially forms in the radial design outer area of the guide vanes, where the pressure is generated by the guide vanes generated centrifugal forces is greatest anyway.
- FIG. 1 shows a longitudinal section of an inventive side channel pump trained feed pump with a pump housing 1.
- an impeller 2 is rotatably arranged in the Impeller 2 are in each of its two end faces 3, 4 a ring 5 of Guide blades 6, 6a, 6b incorporated.
- the impeller 2 is at its center non-rotatably attached to a drive shaft 7.
- the pump housing 1 has
- the part-ring-shaped channels 8, 9 form together with vane chambers 10, 10a, 10b shown in Figure 2 between the Guide vanes 6, 6a, 6b delivery chambers 11, 12.
- the circulation flows are for clarification marked with arrows in FIGS. 1 and 2.
- the conveying chambers 11, 12 have a connection 13 to one another which by an intersection of the semicircular cross sections of the Blade chambers 10, 10a, 10b is generated. Through this connection 13 can move fluid from one delivery chamber with almost no swirling 11 flow into the other delivery chamber 12.
- Impeller 2 In its radially outer area and on its end faces 3, 4 this is Impeller 2 opposite the pump housing 1 with a small distance. This creates a sealing gap 14 running around the impeller 2, which seals the delivery chambers 11, 12.
- Seen from the guide vanes 6, 6a, 6b in the radially inner region of the impeller 2 are several opposite one another in the end faces 3, 4 Wells 15, 16 incorporated. Two opposite each other Wells 15, 16 are connected to one another by a channel 17.
- a channel 17 Through the sealing gap 14 between the impeller 2 and the pump housing 1 gets a small amount of leakage of the pumped Liquid to the wells 15, 16. This forms the wells 15, 16 axial slide bearing for the impeller 2.
- the impeller 2 thus floats smoothly on a liquid film.
- FIG. 2 shows a tangential section through the invention Feed pump from Figure 1 along the line II - II.
- the pump housing 1 has an inlet channel 18 and an outlet channel 19 by one Sills 20 arranged on both sides of the impeller 2 are separated from one another are.
- the sill 20 interrupts those in the delivery chambers 11, 12 generated circulation flows of the liquid to be pumped.
- the inlet duct 18 opens into a delivery chamber 11, while the other Delivery chamber 12 opens into the outlet channel 19.
- the partially annular channel 8 of the delivery chamber 11, into which the inlet channel 18 opens out, has a calming area 21 on the input side a compression area 22 connects.
- the compression area 22 reduces the cross section of the partially annular channel 8 by approximately Half.
- a conveying area closes at the compression area 22 23 with a constant cross section.
- the immediately before Sill 20 opens into an end region 24.
- In the inlet channel 18 is one Flow guide vane 25 arranged in one piece with the pump housing 1 is made.
- the partially annular channel 9 in the outlet channel 19 opening delivery chamber 12 has seen on the inlet side in the flow direction a cross-sectional extension 26, which is over the same Angular area extends like the calming area 21 of the other part-ring-shaped Channel 8.
- the cross-sectional extension 26 follows a conveying area 27 with a constant cross section.
- FIG. 3 shows a sectional illustration along the line III-III Figure 1 shows the partially annular channel 8 into which the inlet channel 18 opens.
- the inlet channel 18 is half of the flow guide vane 25 covered.
- the calming area 21 of the whip ring Channel 8 extends approximately over an angular range of 50 ° which the compression area 22 extends approximately over an angular range of 70 °.
- the Pump housing 1 penetrated by a vent hole 28. This Vent hole 28 is used primarily for venting the feed pump when filling for the first time.
- FIG. 4 shows the partial ring-shaped opening into the outlet channel 19 Channel 9. It can clearly be seen that the radially outer boundary of the partially annular channel 9 a constant over the entire angular range Has radius. The cross-sectional expansion 26 at the beginning of Partial ring-shaped channel 9 is generated by the radially inner boundary.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Jet Pumps And Other Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Description
- Figur 1
- einen Längsschnitt durch eine erfindungsgemäße Förderpumpe,
- Figur 2
- einen tangentialen Schnitt durch die Förderpumpe aus Figur 1 entlang der Linie II - II,
- Figur 3
- eine Schnittdarstellung durch die Förderpumpe entlang der Linie III - III aus Figur 1,
- Figur 4
- eine Schnittdarstellung durch die Förderpumpe entlang der Linie IV - IV aus Figur 1.
Claims (7)
- Förderpumpe mit einem angetriebenen, sich in einem Pumpengehäuse (1) drehenden Laufrad (2), welches an zumindest einer seiner Stirnseiten (3, 4) einen Kranz Schaufelkammern (10, 10a, 10b) begrenzender Leitschaufeln (6, 6a, 6b) und mit zumindest einem im Bereich der Leitschaufeln (6, 6a, 6b) in dem Pumpengehäuse (1) angeordneten teilringförmigen Kanal (8), welcher mit den Schaufelkammern (10, 10a, 10b) eine zum Fördern einer Flüssigkeit von einem Einlaßkanal (18) bis zu einem Auslaßkanal (19) vorgesehene Förderkammer bildet und einen Kompressionsbereich (22) mit einem sich über einen begrenzten Winkelbereich verjüngenden Querschnitt aufweist, dadurch gekennzeichnet, daß der teilringförmige Kanal (8) zwischen dem Einlaßkanal (18) und dem Kompressionsbereich (22), der sich über einen Winkelbereich von ungefähr 70° erstreckt. einen Beruhigungsbereich (21), der sich über einen Winkelbereich von ungefähr 50° erstreckt mit einem konstanten Querschnitt aufweist.
- Förderpumpe nach Anspruch 1, dadurch gekennzeichnet, daß beidseitig des Laufrades (2) Förderkammern (10, 10a, 10b) angeordnet sind, welche zum Überströmen der Flüssigkeit von der einen Förderkammer (11) in die andere Förderkammer (12) eine Verbindung aufweisen, wobei der Einlaßkanal (18) in die eine Förderkammer und die andere Förderkammer (11) in den Auslaßkanal (19) mündet, daß der teilringförmige Kanal (9) der in den Auslaßkanal (19) mündenden Förderkammer (12) eine in Bewegungsrichtung der Leitschaufeln (6) gesehen kontinuierliche, sich im wesentlichen über den gleichen Winkelbereich wie der Beruhigungsbereich (21) des teilringförmigen Kanals (8) der anderen Förderkammer (11) erstreckende Querschnittserweiterung (26) aufweist.
- Förderpumpe nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß im Bereich des Einlaßkanals (18) eine Strömungsleitschaufel (25) angeordnet ist, welche zur Einleitung der zu pumpenden Flüssigkeit in tangentialer Richtung in den Beruhigungsbereich (21) der Förderkammer (11) ausgebildet ist.
- Förderpumpe nach Anspruch 3, dadurch gekennzeichnet, daß die Strömungsleitschaufel (25) einteilig mit dem Pumpengehäuse (1) gefertigt und an der dem teilringförmigen Kanal (8) abgewandten Seite des Einlaßkanals (18) angeordnet ist.
- Förderpumpe nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Übergang des Einlaßkanals (18) in den Beruhigungsbereich (21) des teilringförmigen Kanals (8) auf der der Strömungsleitschaufel (25) gegenüberliegenden Seite gerundet ist.
- Förderpumpe nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der teilringförmige Kanal (8) am Ende des Kompressionsbereichs (22) eine das Pumpengehäuse (1) durchdringende Entlüftungsbohrung (28) hat.
- Förderpumpe nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Querschnittserweiterung (26) des zu dem Auslaßkanal (19) führenden teilringförmigen Kanals (9) durch eine Verbreiterung des teilringförmigen Kanals (9) erzeugt ist.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19643728A DE19643728A1 (de) | 1996-10-23 | 1996-10-23 | Förderpumpe |
| DE19643728 | 1996-10-23 | ||
| PCT/EP1997/005403 WO1998017916A1 (de) | 1996-10-23 | 1997-10-01 | Förderpumpe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0934466A1 EP0934466A1 (de) | 1999-08-11 |
| EP0934466B1 true EP0934466B1 (de) | 2002-06-05 |
Family
ID=7809549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97910403A Expired - Lifetime EP0934466B1 (de) | 1996-10-23 | 1997-10-01 | Förderpumpe |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US6152687A (de) |
| EP (1) | EP0934466B1 (de) |
| KR (1) | KR20000049235A (de) |
| CN (1) | CN1082629C (de) |
| BR (1) | BR9713271A (de) |
| DE (2) | DE19643728A1 (de) |
| ES (1) | ES2177951T3 (de) |
| WO (1) | WO1998017916A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007003555B4 (de) * | 2006-08-04 | 2016-11-10 | Continental Automotive Gmbh | Förderpumpe mit Filter |
Families Citing this family (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19744037C1 (de) * | 1997-10-06 | 1999-06-02 | Mannesmann Vdo Ag | Förderpumpe |
| DE19941786B4 (de) * | 1999-09-02 | 2008-11-20 | Continental Automotive Gmbh | Förderpumpe |
| DE10013908A1 (de) * | 2000-03-21 | 2001-09-27 | Mannesmann Vdo Ag | Förderpumpe |
| US6527506B2 (en) * | 2000-03-28 | 2003-03-04 | Delphi Technologies, Inc. | Pump section for fuel pump |
| US6533538B2 (en) * | 2000-12-07 | 2003-03-18 | Delphi Technologies, Inc. | Impeller for fuel pump |
| JP3800128B2 (ja) * | 2001-07-31 | 2006-07-26 | 株式会社デンソー | インペラ及びタービン式燃料ポンプ |
| US6688844B2 (en) * | 2001-10-29 | 2004-02-10 | Visteon Global Technologies, Inc. | Automotive fuel pump impeller |
| US6655909B2 (en) | 2001-11-30 | 2003-12-02 | Visteon Global Technologies, Inc. | High flow fuel pump |
| DE10202366A1 (de) * | 2002-01-23 | 2003-08-07 | Pierburg Gmbh | Seitenkanalpumpe |
| US7037066B2 (en) | 2002-06-18 | 2006-05-02 | Ti Group Automotive Systems, L.L.C. | Turbine fuel pump impeller |
| US6932562B2 (en) * | 2002-06-18 | 2005-08-23 | Ti Group Automotive Systems, L.L.C. | Single stage, dual channel turbine fuel pump |
| JP4310426B2 (ja) * | 2002-07-25 | 2009-08-12 | 米原技研有限会社 | 加圧遠心ポンプの気体の混入構造 |
| US6767181B2 (en) * | 2002-10-10 | 2004-07-27 | Visteon Global Technologies, Inc. | Fuel pump |
| US6984099B2 (en) * | 2003-05-06 | 2006-01-10 | Visteon Global Technologies, Inc. | Fuel pump impeller |
| JP2005016312A (ja) | 2003-06-23 | 2005-01-20 | Aisan Ind Co Ltd | 燃料ポンプ |
| US20040258545A1 (en) * | 2003-06-23 | 2004-12-23 | Dequan Yu | Fuel pump channel |
| KR100590169B1 (ko) * | 2004-04-13 | 2006-06-19 | 주식회사 캐프스 | 자동차용 연료펌프의 임펠러구조 |
| JP4252507B2 (ja) * | 2004-07-09 | 2009-04-08 | 愛三工業株式会社 | 燃料ポンプ |
| JP4672420B2 (ja) * | 2005-04-08 | 2011-04-20 | 愛三工業株式会社 | 燃料ポンプ |
| DE102010004379A1 (de) | 2009-12-16 | 2011-06-22 | Continental Automotive GmbH, 30165 | Kraftstoffpumpe |
| US9249806B2 (en) | 2011-02-04 | 2016-02-02 | Ti Group Automotive Systems, L.L.C. | Impeller and fluid pump |
| KR101349689B1 (ko) * | 2011-12-19 | 2014-01-13 | 자동차부품연구원 | 베인 펌프 및 이를 갖는 자동차 |
| US9840122B2 (en) * | 2013-05-20 | 2017-12-12 | Vilo NIUMEITOLU | Electric generator for attachment to a shock absorber |
| JP6482542B2 (ja) * | 2014-05-21 | 2019-03-13 | エウレカ・ラボ株式会社 | ミル機能と羽根せん断機能との一体型微細化装置 |
| US20170023022A1 (en) * | 2015-07-20 | 2017-01-26 | Delphi Technologies, Inc. | Fluid pump |
| CN119467426B (zh) * | 2024-11-01 | 2025-09-16 | 杰锋汽车动力系统股份有限公司 | 一种具有高性能流道的氢气循环泵 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6079193A (ja) * | 1983-10-05 | 1985-05-04 | Nippon Denso Co Ltd | 車両用燃料ポンプ |
| GB2239050B (en) * | 1989-11-17 | 1993-10-06 | Mitsubishi Electric Corp | Circumferential flow type fuel pump |
| CN2068609U (zh) * | 1990-03-19 | 1991-01-02 | 陆守余 | 液环式氯气泵 |
| JP2757646B2 (ja) * | 1992-01-22 | 1998-05-25 | 株式会社デンソー | 燃料ポンプ |
| US5284417A (en) * | 1993-06-07 | 1994-02-08 | Ford Motor Company | Automotive fuel pump with regenerative turbine and long curved vapor channel |
| DE4343078B4 (de) * | 1993-12-16 | 2007-09-13 | Robert Bosch Gmbh | Aggregat zum Fördern von Kraftstoff aus einem Vorratstank zu einer Brennkraftmaschine |
| DE4446537C2 (de) * | 1994-12-24 | 2002-11-07 | Bosch Gmbh Robert | Flüssigkeitspumpe |
| US5586858A (en) * | 1995-04-07 | 1996-12-24 | Walbro Corporation | Regenerative fuel pump |
| US5551835A (en) * | 1995-12-01 | 1996-09-03 | Ford Motor Company | Automotive fuel pump housing |
-
1996
- 1996-10-23 DE DE19643728A patent/DE19643728A1/de not_active Ceased
-
1997
- 1997-10-01 US US09/284,562 patent/US6152687A/en not_active Expired - Lifetime
- 1997-10-01 DE DE59707441T patent/DE59707441D1/de not_active Expired - Lifetime
- 1997-10-01 BR BR9713271-3A patent/BR9713271A/pt active Search and Examination
- 1997-10-01 EP EP97910403A patent/EP0934466B1/de not_active Expired - Lifetime
- 1997-10-01 WO PCT/EP1997/005403 patent/WO1998017916A1/de not_active Ceased
- 1997-10-01 ES ES97910403T patent/ES2177951T3/es not_active Expired - Lifetime
- 1997-10-01 KR KR1019990703339A patent/KR20000049235A/ko not_active Ceased
- 1997-10-01 CN CN97198972A patent/CN1082629C/zh not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007003555B4 (de) * | 2006-08-04 | 2016-11-10 | Continental Automotive Gmbh | Förderpumpe mit Filter |
Also Published As
| Publication number | Publication date |
|---|---|
| HK1022508A1 (en) | 2000-08-11 |
| DE59707441D1 (de) | 2002-07-11 |
| WO1998017916A1 (de) | 1998-04-30 |
| KR20000049235A (ko) | 2000-07-25 |
| CN1234097A (zh) | 1999-11-03 |
| BR9713271A (pt) | 2000-03-28 |
| DE19643728A1 (de) | 1998-04-30 |
| EP0934466A1 (de) | 1999-08-11 |
| ES2177951T3 (es) | 2002-12-16 |
| US6152687A (en) | 2000-11-28 |
| CN1082629C (zh) | 2002-04-10 |
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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): DE ES FR GB |
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| 17P | Request for examination filed |
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