WO2004044431A2 - Vacuum pump - Google Patents
Vacuum pump Download PDFInfo
- Publication number
- WO2004044431A2 WO2004044431A2 PCT/DE2003/003747 DE0303747W WO2004044431A2 WO 2004044431 A2 WO2004044431 A2 WO 2004044431A2 DE 0303747 W DE0303747 W DE 0303747W WO 2004044431 A2 WO2004044431 A2 WO 2004044431A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- vacuum pump
- pump
- wing
- residual oil
- bypass
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/28—Safety arrangements; Monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
- F04C18/3441—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/04—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for reversible pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2220/00—Application
- F04C2220/10—Vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2250/00—Geometry
- F04C2250/10—Geometry of the inlet or outlet
- F04C2250/101—Geometry of the inlet or outlet of the inlet
Definitions
- the invention relates to a vacuum pump, in particular for brake boosters for motor vehicles, the pump normally being driven by the motor vehicle internal combustion engine in one direction of rotation (“forward”).
- the vacuum pumps accordingly have a fixed direction of rotation. Vacuum pumps of this type are known.
- a vacuum pump in particular for brake boosters for motor vehicles, the pump normally being driven in one direction of rotation (“forward”) by the motor vehicle internal combustion engine, the vacuum pump having a device which serves to prevent damage when turning backwards Device an outlet valve for the residual oil to the cylinder head of the internal combustion engine.
- An additional valve is provided which opens a path for the oil to the cylinder head when running in reverse. During normal operation of the pump, this check valve is closed and does not allow any air from the cylinder head into the air as external air
- This pump is preferably combined with the pump outlet valve so that a spring plate valve has two tongues and is secured with a screw.
- a vacuum pump in which the device has a bypass device for the residual oil is also preferred.
- a bypass device preferably designed as a swivel wing, is installed in the pump housing. is positioned.
- the swivel wing is in contact with the rotor, which can be caused by a pressure difference and / or a spring force.
- the pressure in front of the wing causes the swivel wing to lift off, clearing the way for the residual oil, either to the cylinder head or to the other side of the wing.
- the pivoting wing device is preferably used in a pump with a mono-wing without movable caps, because the mono-wing then always rests on the opposite side due to the centrifugal force and thus has no contact with the pivoting wing.
- the swivel wing is preferably designed as a plastic part, but can also be designed as a sheet metal part and can be shown either pivotable or elastically deformable.
- a vacuum pump is preferred in which the device has a bypass groove.
- a bypass groove is preferably arranged in the housing and / or cover in the region of the air inlet opening, that is to say the suction port. This bypass enables the residual oil to flow back past the wing and in this way to avoid pressure peaks caused by residual oil being pushed back when running backwards.
- a vacuum pump is also preferred in which the device has a storage volume for residual oil. Pressure peaks due to the residual oil can therefore be avoided by pushing the residual oil into the storage volume when the pump is turned backwards, so that the pump can rotate backwards without residual oil in front of the wing and thus without crushing oil.
- This memory can be accommodated in the pump housing.
- the suction hose of the pump or part of the suction hose can also be used as a storage volume.
- the suction valve is not arranged in the suction port of the pump, but in the suction hose.
- the volume between the suction valve and the pump chamber should preferably be designed so large that it is greater than the maximum residual oil volume that occurs.
- Another pump according to the invention is characterized in that the device has a bypass in the cover.
- a pressure-dependent bypass is integrated in the cover of the pump, which opens at an increased pressure upstream of the suction valve and allows oil to flow out of this area into the other pump chamber and / or to the inner rotor bore.
- This bypass can be designed as a resilient sheet which lies on the inside of the cover and which can be at least partially pushed away into corresponding recesses in the cover when subjected to pressure.
- the bypass can be designed as a piston in the cover.
- a vacuum pump is preferred in which the rotor has a clamping roller freewheel which blocks the connection between the rotor and drive element, such as a clutch, in one direction of rotation (“forwards”), and clamps, and in the opposite direction of rotation (“backwards”). allows the drive element to run freely without the rotor taking part in the reverse rotation.
- the freewheel can be pressed onto the rotor, the known sliding bearing between the rotor and the pump housing being replaced by the roller bearing of the pinch roller freewheel.
- Figure 1 shows a pump with an outlet valve for the residual oil.
- Figure 2 shows a bypass designed as a swivel wing for the residual oil.
- Figure 3 shows a bypass groove in the housing for the residual oil.
- a vacuum pump 1 is shown in perspective.
- the vacuum pump has a housing 3, in which an eccentrically arranged rotor with a mono-wing is not visible here.
- Such vacuum pumps are known in their construction and function and are therefore not to be explained further.
- the direction of rotation of the rotor is shown on the housing by an arrow 5, so that it can be seen that in this direction of rotation the delivery volume increases in area 7 when the rotor rotates and thus leads to suction and in delivery area 9 the pump volume decreases and thus leads to the ejection of the funding.
- the funding is therefore in area 7 via Suction nozzle 11 sucked in and then ejected via an outlet valve 13 when upper dead center is exceeded and the delivery volume in region 9 is reduced.
- an additional valve 15 is therefore arranged, which opens when turning backwards towards the cylinder head and can drain the residual oil into this area, that is to say analogously to how the outlet valve 13 normally behaves in the normal delivery direction 5.
- the outlet valve 15 remains closed for the residual oil, since negative pressure builds up in the region 7 and therefore the atmospheric pressure in the cylinder head keeps the tongue valve 15 closed.
- the valve 15 for reverse running is combined with the pump outlet valve 13, so that a spring plate valve has two tongues and is secured with a screw 17.
- FIG. 1b The corresponding individual parts of the valves are shown in the disassembled state in FIG. 1b.
- the screw 17 fixes the hold-down device 19 and the spring tongue valve 23 of the pump outlet valve 13 as well as the hold-down device 21 and the spring tongue 25 of the reverse flow valve 15.
- the spring tongue 23 of the pump outlet valve 13 closes the pump outlet opening 27 in the unpressurized state, while the spring tongue 25 of the reverse flow valve 15 closes the outlet opening 29 closes in the normal direction of rotation of the pump.
- a very simple combination of the outlet valve 13 with the reverse flow valve 15 thus provides a reliable solution to the pump's reverse flow problems without the need for additional components. Only the hold-down device of the outlet valve has to be extended by the region 21 and the spring tongue 23 of the outlet valve by the region 25.
- FIG. 2 shows a bypass device for the residual oil when turning backwards in the form of a swivel wing device.
- a rotor 30, which simplifies here without the mono wing is shown, is arranged eccentrically in a housing 32.
- the housing 32 has a bulge 34 in which a swivel wing device 36 is arranged.
- the swivel wing device 36 lies in the area 38 in a sealing manner against the rotor.
- the direction of rotation of the rotor in normal operation is indicated by arrow 40.
- the swivel blade is in sealing contact with the rotor, the pressure zone of the vacuum pump being in area 48 and the suction zone of the vacuum pump in area 50.
- the rotor and the housing can have approximately the same radius of curvature over an angular range ⁇ , here with the reference number 46 between the housing 32 and the rotor 30, so that a good sealing gap sealing is also possible is present when the swivel wing performs its actual safety function when reversing.
- This narrow gap seal also prevents pressure peaks from causing the mono wing to lift off.
- the suction area 50 suddenly becomes a pressure area, in which area a pressure peak can then build up as a result of the squeezed oil pressed backwards.
- This pressure peak is then relieved by opening the swivel wing 36 in the area 42, which is connected to the cylinder head area.
- region 42 the pressure in the cylinder head region normally prevails, which corresponds approximately to the atmospheric pressure.
- a mono-wing without movable caps is used in a pump with this swivel-wing device, because the mono-wing then always rests on the opposite side due to the centrifugal force and thus has no contact with the swivel wing 36.
- the swivel wing 36 itself can be pressed against the rotor 30 in a sealing manner both by a spring force 44 and by the pressure force of the pressure in the area 42.
- a bypass groove 54 on the rear side 52 of the pump housing 3 is shown in FIG. 3 as a reverse run relief device.
- the bypass groove 54 is arranged in the suction area of the pump and thus in the area of the suction nozzle 11.
- the outlet opening 56 of the outlet valve is located opposite when the pump is rotated in the normal direction of rotation 40. If the pump runs the other way around when the internal combustion engine is turned backwards, the bypass groove 54 can push the pinch oil to the side past the wing to the rear, thereby avoiding the build-up of pressure peaks.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03779691A EP1563190A2 (en) | 2002-11-13 | 2003-11-12 | Vacuum pump |
AU2003287863A AU2003287863A1 (en) | 2002-11-13 | 2003-11-12 | Vacuum pump |
DE10393279T DE10393279D2 (en) | 2002-11-13 | 2003-11-12 | vacuum pump |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10252769.5 | 2002-11-13 | ||
DE10252769 | 2002-11-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2004044431A2 true WO2004044431A2 (en) | 2004-05-27 |
WO2004044431A3 WO2004044431A3 (en) | 2004-09-16 |
Family
ID=32308526
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2003/003747 WO2004044431A2 (en) | 2002-11-13 | 2003-11-12 | Vacuum pump |
Country Status (4)
Country | Link |
---|---|
EP (2) | EP1563190A2 (en) |
AU (1) | AU2003287863A1 (en) |
DE (1) | DE10393279D2 (en) |
WO (1) | WO2004044431A2 (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006005383A1 (en) * | 2004-07-09 | 2006-01-19 | Joma-Hydromechanic Gmbh | Single-winged vacuum pump |
WO2006005384A1 (en) * | 2004-07-09 | 2006-01-19 | Joma-Hydromechanic Gmbh | Single-winged vacuum pump |
WO2006122515A1 (en) * | 2005-05-19 | 2006-11-23 | Ixetic Hückeswagen Gmbh | Pump comprising a free-running sliding coupling |
DE102007010729B3 (en) * | 2007-01-04 | 2008-04-24 | Joma-Polytec Kunststofftechnik Gmbh | Vacuum pump for use in engine of motor vehicle, has sealing body flexibly designed and fixed at air discharge opening at front and rear ends of opening in rotation direction of rotor, where body lies permanently at opening |
WO2008125155A1 (en) * | 2007-04-12 | 2008-10-23 | Joma-Hydromechanic Gmbh | Vacuum pump |
DE102010026032A1 (en) * | 2010-07-03 | 2012-01-05 | Mahle International Gmbh | Flatter valve i.e. non-return valve, for use in rotary vane pump in brake booster in motor car, has blank holder whose form corresponds to bending line of single-sided clamped bending bar, which is designed as cantilever arm |
US8469684B2 (en) | 2005-07-07 | 2013-06-25 | Oerlikon Leybold Vacuum Gmbh | Rotary vacuum pump with a discharge compensating channel |
EP2249041A3 (en) * | 2009-05-01 | 2014-08-13 | Wabco Automotive UK Limited | Sliding vane vacuum pump with an oil relief valve |
DE112007001540B4 (en) * | 2006-07-21 | 2016-05-12 | Magna Powertrain Hückeswagen GmbH | vacuum pump |
DE102017123695A1 (en) * | 2017-10-11 | 2019-04-11 | Schwäbische Hüttenwerke Automotive GmbH | rotary pump |
CN109882414A (en) * | 2017-12-06 | 2019-06-14 | 悦马塑料技术有限公司 | Vacuum pump |
US20210332820A1 (en) * | 2020-04-24 | 2021-10-28 | Schwäbische Hüttenwerke Automotive GmbH | Vacuum pump |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009016048B4 (en) * | 2009-04-02 | 2018-05-30 | Bayerische Motoren Werke Aktiengesellschaft | Pump for a motor vehicle internal combustion engine and motor vehicle internal combustion engine with pump |
ITTO20131083A1 (en) | 2013-12-30 | 2015-07-01 | Vhit Spa | ROTARY PUMP WITH SAFETY VALVE AND OPERATING METHOD |
DE102016202426A1 (en) * | 2016-02-17 | 2017-08-17 | Mahle International Gmbh | Check valve for a vacuum pump |
DE102016207115A1 (en) * | 2016-04-27 | 2017-11-02 | Mahle International Gmbh | Check valve for a vacuum pump |
DE102016207123A1 (en) * | 2016-04-27 | 2017-11-02 | Mahle International Gmbh | Check valve for a vacuum pump |
JP6613222B2 (en) | 2016-11-03 | 2019-11-27 | 大豊工業株式会社 | Vane pump |
JP6534647B2 (en) | 2016-11-03 | 2019-06-26 | 大豊工業株式会社 | Vane pump |
DE102016122903A1 (en) * | 2016-11-28 | 2018-05-30 | Schwäbische Hüttenwerke Automotive GmbH | Gas pump with oil return |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH553332A (en) * | 1972-06-13 | 1974-08-30 | Burckhardt Ag Maschf | DEVICE FOR REGULATING THE WORKING MEDIUM PRESSURE IN A LIQUID RING PUMP. |
DE2613472A1 (en) * | 1976-03-30 | 1977-10-13 | Hori Technical Lab Ltd | Dry lubrication rotary air compressor - has oscillating pistons in annular chamber with radial dividing walls |
EP0255920A2 (en) * | 1986-08-06 | 1988-02-17 | B a r m a g AG | Vane vacuum pump |
DE4019854A1 (en) * | 1989-07-10 | 1991-01-17 | Barmag Barmer Maschf | Vane cell vacuum pump for servo drive - use of kidney-shaped hole as outlet channel |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1926797A1 (en) * | 1969-05-24 | 1970-11-26 | Gerspach Dr Phil Wolfram | Vacuum check valve, especially for brake booster 100000 |
DE2629337C2 (en) * | 1976-06-30 | 1986-08-07 | Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid | Vane vacuum pump |
JPS61109975A (en) * | 1984-11-02 | 1986-05-28 | Hitachi Koki Co Ltd | Float type oil reversing flow inhibitor |
DE3618301A1 (en) * | 1985-06-05 | 1986-12-18 | Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid | Vacuum pump |
DE4002771A1 (en) * | 1990-01-31 | 1991-08-01 | Vdo Schindling | Vehicle vacuum brake booster connected to carburettor - has rotary vane exhaust cutting in when vacuum is insufficient |
EP0515929B1 (en) * | 1991-05-29 | 1998-07-29 | LuK Automobiltechnik GmbH & Co. KG | Vacuum vane pump mounted on the motor housing of a vehicle engine |
JP2891047B2 (en) | 1993-08-05 | 1999-05-17 | 株式会社日立製作所 | Vane type vacuum pump |
JP2000205159A (en) | 1999-01-11 | 2000-07-25 | Hitachi Ltd | Vane type vacuum pump |
-
2003
- 2003-11-12 DE DE10393279T patent/DE10393279D2/en not_active Ceased
- 2003-11-12 EP EP03779691A patent/EP1563190A2/en not_active Withdrawn
- 2003-11-12 AU AU2003287863A patent/AU2003287863A1/en not_active Abandoned
- 2003-11-12 EP EP07022290A patent/EP1890040B1/en not_active Expired - Lifetime
- 2003-11-12 WO PCT/DE2003/003747 patent/WO2004044431A2/en not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH553332A (en) * | 1972-06-13 | 1974-08-30 | Burckhardt Ag Maschf | DEVICE FOR REGULATING THE WORKING MEDIUM PRESSURE IN A LIQUID RING PUMP. |
DE2613472A1 (en) * | 1976-03-30 | 1977-10-13 | Hori Technical Lab Ltd | Dry lubrication rotary air compressor - has oscillating pistons in annular chamber with radial dividing walls |
EP0255920A2 (en) * | 1986-08-06 | 1988-02-17 | B a r m a g AG | Vane vacuum pump |
DE4019854A1 (en) * | 1989-07-10 | 1991-01-17 | Barmag Barmer Maschf | Vane cell vacuum pump for servo drive - use of kidney-shaped hole as outlet channel |
Non-Patent Citations (1)
Title |
---|
See also references of EP1563190A2 * |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101002022B (en) * | 2004-07-09 | 2012-06-06 | 约马液压机械有限公司 | Single-winged vacuum pump |
WO2006005384A1 (en) * | 2004-07-09 | 2006-01-19 | Joma-Hydromechanic Gmbh | Single-winged vacuum pump |
WO2006005383A1 (en) * | 2004-07-09 | 2006-01-19 | Joma-Hydromechanic Gmbh | Single-winged vacuum pump |
WO2006122515A1 (en) * | 2005-05-19 | 2006-11-23 | Ixetic Hückeswagen Gmbh | Pump comprising a free-running sliding coupling |
US8469684B2 (en) | 2005-07-07 | 2013-06-25 | Oerlikon Leybold Vacuum Gmbh | Rotary vacuum pump with a discharge compensating channel |
DE112007001540B4 (en) * | 2006-07-21 | 2016-05-12 | Magna Powertrain Hückeswagen GmbH | vacuum pump |
DE102007010729B3 (en) * | 2007-01-04 | 2008-04-24 | Joma-Polytec Kunststofftechnik Gmbh | Vacuum pump for use in engine of motor vehicle, has sealing body flexibly designed and fixed at air discharge opening at front and rear ends of opening in rotation direction of rotor, where body lies permanently at opening |
WO2008125155A1 (en) * | 2007-04-12 | 2008-10-23 | Joma-Hydromechanic Gmbh | Vacuum pump |
EP2249041A3 (en) * | 2009-05-01 | 2014-08-13 | Wabco Automotive UK Limited | Sliding vane vacuum pump with an oil relief valve |
EP2853747A1 (en) * | 2009-05-01 | 2015-04-01 | Wabco Automotive UK Limited | Vacuum pump |
DE102010026032A1 (en) * | 2010-07-03 | 2012-01-05 | Mahle International Gmbh | Flatter valve i.e. non-return valve, for use in rotary vane pump in brake booster in motor car, has blank holder whose form corresponds to bending line of single-sided clamped bending bar, which is designed as cantilever arm |
DE102017123695A1 (en) * | 2017-10-11 | 2019-04-11 | Schwäbische Hüttenwerke Automotive GmbH | rotary pump |
CN109882414A (en) * | 2017-12-06 | 2019-06-14 | 悦马塑料技术有限公司 | Vacuum pump |
US20210332820A1 (en) * | 2020-04-24 | 2021-10-28 | Schwäbische Hüttenwerke Automotive GmbH | Vacuum pump |
US11927190B2 (en) * | 2020-04-24 | 2024-03-12 | Schwäbische Hüttenwerke Automotive GmbH | Vacuum pump |
Also Published As
Publication number | Publication date |
---|---|
WO2004044431A3 (en) | 2004-09-16 |
EP1890040A3 (en) | 2008-02-27 |
EP1563190A2 (en) | 2005-08-17 |
EP1890040A2 (en) | 2008-02-20 |
AU2003287863A8 (en) | 2004-06-03 |
AU2003287863A1 (en) | 2004-06-03 |
DE10393279D2 (en) | 2005-06-02 |
EP1890040B1 (en) | 2012-06-27 |
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