CA2747074A1 - Fuel pump for internal combustion engines - Google Patents
Fuel pump for internal combustion engines Download PDFInfo
- Publication number
- CA2747074A1 CA2747074A1 CA2747074A CA2747074A CA2747074A1 CA 2747074 A1 CA2747074 A1 CA 2747074A1 CA 2747074 A CA2747074 A CA 2747074A CA 2747074 A CA2747074 A CA 2747074A CA 2747074 A1 CA2747074 A1 CA 2747074A1
- Authority
- CA
- Canada
- Prior art keywords
- pump
- fuel
- gear
- driveshaft
- fuel pump
- 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.)
- Abandoned
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
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
- F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
- F04C15/0073—Couplings between rotors and input or output shafts acting by interengaging or mating parts, i.e. positive coupling of rotor and shaft
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven 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
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
- F04C15/0076—Fixing rotors on shafts, e.g. by clamping together hub and shaft
-
- 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
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C2/18—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
- F16D1/101—Quick-acting couplings in which the parts are connected by simply bringing them together axially without axial retaining means rotating with the coupling
-
- 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
- F04C2240/00—Components
- F04C2240/20—Rotors
-
- 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
- F04C2240/00—Components
- F04C2240/60—Shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
- F16D2001/102—Quick-acting couplings in which the parts are connected by simply bringing them together axially the torque is transmitted via polygon shaped connections
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Rotary Pumps (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention relates to a fuel pump, especially the prefeed pump for feeding aircraft fuel to the high pressure pump, wherein the form-fit connection between the drive shaft (4) and the driven impeller (2) is produced by a regular, convex, triangular polygonal contour having rounded-off lateral faces and corner faces, the drive shaft and the impeller being provided with said polygonal contour. In this manner, the wear resulting from the poor lubricating power of the kerosene-based aircraft fuel can be reduced and the service life of the fuel pump can be increased.
Description
Fuel pump for internal combustion engines DESCRIPTION
The invention relates to a fuel pump, especially prefeed pump for internal combustion engines comprising a gear pump with a pump impeller driven via a driveshaft, more preferably for diesel engines operated with aircraft fuel.
The fuel feed to the combustion chamber of aircraft engines operated in common-rail technology using aircraft fuel takes place from a tank via a prefeed pump and a high-pressure pump to a common distribution pipe (rail) connected to the individual cylinders, as is well known.
Since a failure of a fuel pump invariably results in engine stoppage, an extremely high reliability is demanded particularly with aircraft engines. The reliability and the maximum operating duration of the fuel pumps are particularly limited in that they are lubricated with the delivered fuel and the bearings and sliding surfaces are under more or less load corresponding to the lubricating power of the fuel. The lifespan of the fuel pumps is thus decisively influenced by the lubricating properties of the respective fuel. Since the diesel engines employed in aircraft are operated with a kerosene-based aircraft fuel with significantly lower lubricating power compared with diesel fuel, the lifespan of the fuel pumps in this case is particularly low.
In the case of a prefeed pump designed as a gear pump the pump gear (drive gear) of said prefeed pump is connected to a drive shaft by way of a splined shaft toothing, whose outer toothing (outer profile) present on a shaft end form-fittingly engages in an internal toothing (inner profile) present on the drive gear of the prefeed pump. The prefeed pump designed in this manner only has a very short lifespan when used for a diesel engine operated with aircraft fuel since the driveshaft and the driven pump gear and consequently also the pump housing are subjected to high wear and the prefeed pump has to be replaced completely even after a short operating time.
DE 100 14 548 Al describes a gear feed pump for diesel fuel with which the form-fit connection between the drive shaft and the one pump gear is established through a flattened circle geometry or via a profiling provided with recesses and protrusions.
The invention is therefore based on the object of designing the prefeed pump connected upstream of the high-pressure pump in such a manner that even when using fuel with reduced lubricating power a long lifespan is guaranteed.
According to the invention, this object is solved with a fuel pump or prefeed pump designed as gear pump according to the features of Patent Claim 1. Practical configurations of the invention are the subject of the subclaims.
The essence of the invention in other words consists in that the form-fit connection between the driveshaft and the driven pump gear is established through a convex polygonal contour designed on the driveshaft and on the pump gear.
In a further embodiment of the invention the driveshaft comprises a coupling disc in the shape of a polygon shaped as triangle with lateral faces curved outwardly at a certain radius and corner regions rounded towards the outside, while in the driven pump gear a recess corresponding in shape and size to the coupling disc is formed, so that the coupling disc engages in the recess as an accurate fit.
Surprisingly it was discovered that the connection between driveshaft and pump gear established via two polygons form-fittingly engaging into each other guarantees a secure power transmission and results in a significant reduction of the wear on the form-fit connection point and thus the driveshaft, the pump gears and the pump housing and thus the lifespan of the fuel pump provided for delivering fuel with low lubricating power is increased and its especially for aviation indispensable reliability is improved. In a further configuration of the inventions the convexly curved polygonal contours form-fittingly engaging into each other can also be embodied as polygon, for example as tetragon.
An exemplary embodiment of the invention is explained in more detail by means of the drawing. It shows:
Fig. 1 a perspective representation of a prefeed pump designed as gear pump in a disassembled state;
Fig. 2 a front view of the driveshaft designed with a coupling disc designed as polygon; and Fig. 3 a front view of the drive gear of the prefeed pump with an inner profile designed as polygon.
The prefeed pump shown in a disassembled state in Fig. 1 is designed as gear pump and comprises a pump housing 1, in which a driven first pump gear 2 and a second pump gear 3 are mounted. In addition, a driven driveshaft 4 is mounted in the pump housing 1. A coupling disc 5 moulded onto the driveshaft 4 has the shape of a convex, regular, in this case, triangular polygon, i.e. of a triangle with three curved lateral faces of the same length and the same size internal angles. The coupling disc 5 engages in a recess 6 formed in the driven pump gear 2 whose contour shaped as polygon corresponds to the contour of the coupling disc 5.
Subject to the intermediate connection of a sealing ring 8 the pump housing 1 is closed-off through a housing cover 9 which is fastened by means of cheese-head screws.
The invention relates to a fuel pump, especially prefeed pump for internal combustion engines comprising a gear pump with a pump impeller driven via a driveshaft, more preferably for diesel engines operated with aircraft fuel.
The fuel feed to the combustion chamber of aircraft engines operated in common-rail technology using aircraft fuel takes place from a tank via a prefeed pump and a high-pressure pump to a common distribution pipe (rail) connected to the individual cylinders, as is well known.
Since a failure of a fuel pump invariably results in engine stoppage, an extremely high reliability is demanded particularly with aircraft engines. The reliability and the maximum operating duration of the fuel pumps are particularly limited in that they are lubricated with the delivered fuel and the bearings and sliding surfaces are under more or less load corresponding to the lubricating power of the fuel. The lifespan of the fuel pumps is thus decisively influenced by the lubricating properties of the respective fuel. Since the diesel engines employed in aircraft are operated with a kerosene-based aircraft fuel with significantly lower lubricating power compared with diesel fuel, the lifespan of the fuel pumps in this case is particularly low.
In the case of a prefeed pump designed as a gear pump the pump gear (drive gear) of said prefeed pump is connected to a drive shaft by way of a splined shaft toothing, whose outer toothing (outer profile) present on a shaft end form-fittingly engages in an internal toothing (inner profile) present on the drive gear of the prefeed pump. The prefeed pump designed in this manner only has a very short lifespan when used for a diesel engine operated with aircraft fuel since the driveshaft and the driven pump gear and consequently also the pump housing are subjected to high wear and the prefeed pump has to be replaced completely even after a short operating time.
DE 100 14 548 Al describes a gear feed pump for diesel fuel with which the form-fit connection between the drive shaft and the one pump gear is established through a flattened circle geometry or via a profiling provided with recesses and protrusions.
The invention is therefore based on the object of designing the prefeed pump connected upstream of the high-pressure pump in such a manner that even when using fuel with reduced lubricating power a long lifespan is guaranteed.
According to the invention, this object is solved with a fuel pump or prefeed pump designed as gear pump according to the features of Patent Claim 1. Practical configurations of the invention are the subject of the subclaims.
The essence of the invention in other words consists in that the form-fit connection between the driveshaft and the driven pump gear is established through a convex polygonal contour designed on the driveshaft and on the pump gear.
In a further embodiment of the invention the driveshaft comprises a coupling disc in the shape of a polygon shaped as triangle with lateral faces curved outwardly at a certain radius and corner regions rounded towards the outside, while in the driven pump gear a recess corresponding in shape and size to the coupling disc is formed, so that the coupling disc engages in the recess as an accurate fit.
Surprisingly it was discovered that the connection between driveshaft and pump gear established via two polygons form-fittingly engaging into each other guarantees a secure power transmission and results in a significant reduction of the wear on the form-fit connection point and thus the driveshaft, the pump gears and the pump housing and thus the lifespan of the fuel pump provided for delivering fuel with low lubricating power is increased and its especially for aviation indispensable reliability is improved. In a further configuration of the inventions the convexly curved polygonal contours form-fittingly engaging into each other can also be embodied as polygon, for example as tetragon.
An exemplary embodiment of the invention is explained in more detail by means of the drawing. It shows:
Fig. 1 a perspective representation of a prefeed pump designed as gear pump in a disassembled state;
Fig. 2 a front view of the driveshaft designed with a coupling disc designed as polygon; and Fig. 3 a front view of the drive gear of the prefeed pump with an inner profile designed as polygon.
The prefeed pump shown in a disassembled state in Fig. 1 is designed as gear pump and comprises a pump housing 1, in which a driven first pump gear 2 and a second pump gear 3 are mounted. In addition, a driven driveshaft 4 is mounted in the pump housing 1. A coupling disc 5 moulded onto the driveshaft 4 has the shape of a convex, regular, in this case, triangular polygon, i.e. of a triangle with three curved lateral faces of the same length and the same size internal angles. The coupling disc 5 engages in a recess 6 formed in the driven pump gear 2 whose contour shaped as polygon corresponds to the contour of the coupling disc 5.
Subject to the intermediate connection of a sealing ring 8 the pump housing 1 is closed-off through a housing cover 9 which is fastened by means of cheese-head screws.
The polygonal outer contour of the coupling disc 5 and the recess 6 provided in the driven pump gear 2 is shown in more detail in the Figures 2 and 3. The regular triangular polygon of the coupling disc 5 and of the recess 6 has a circumcircle with the diameter du and an incircle with the diameter dI. However, the polygon has no straight lateral edges (lateral faces) but is convexly shaped, i.e. with crowned lateral faces curved outwardly in the radius RS and within the radius RE rounded corner regions of the polygon of the coupling disc 5 and of the recess 6. The maximum width of the polygon of the recess 6 or of the coupling disc 5 is designated W in the drawing.
With the form-fit between the driveshaft 6 and the driven pump gear embodied as convex polygonal connection the wear of the first and also of the second pump gear as well as of the driveshaft and of the housing can be significantly lowered and the lifespan of the prefeed pump designed as gear pump can be increased by up to three times even when using a fuel with low lubricating power.
The invention is not restricted to the exemplary embodiment described before. For example, the form-fit connection can also be formed through regular convex polygons with more than three corners such as a tetragon or pentagon and also be employed with other fuel pumps with rotating pump wheels.
With the form-fit between the driveshaft 6 and the driven pump gear embodied as convex polygonal connection the wear of the first and also of the second pump gear as well as of the driveshaft and of the housing can be significantly lowered and the lifespan of the prefeed pump designed as gear pump can be increased by up to three times even when using a fuel with low lubricating power.
The invention is not restricted to the exemplary embodiment described before. For example, the form-fit connection can also be formed through regular convex polygons with more than three corners such as a tetragon or pentagon and also be employed with other fuel pumps with rotating pump wheels.
List of reference characters 1. Pump housing 2. First, driven pump gear 3. Second pump gear 4. Driveshaft 5. Coupling disc, triangular convex polygon 6. Recess, triangular convex polygon 7. Cheese-head screws 8. Sealing ring 9. Housing cover Du Circumcircle of polygon DI Incircle of polygon W Maximum width of the polygon Rs Radius of the lateral faces of the polygon RE Radius of the corner faces of the polygon
Claims (4)
1. A fuel pump, particularly prefeed pump for internal combustion engines comprising a gear pump with a pump gear driven via a driveshaft, more preferably for diesel engines operated with aircraft fuel, characterized by a form-fit connection embodied as regular convex polygon having lateral faces and corner regions curved to the outside between the driven pump gear (2) and the driveshaft (4).
2. The fuel pump according to Claim 1, characterized in that the form-fit polygon connection comprises a coupling disc (5) provided on the driveshaft (4) and a recess (6) moulded into the driven pump gear (2) with corresponding polygonal contour.
3. The fuel pump according to Claim 1 or 2, characterized in that the convex polygonal contour is triangular and in the radius Rs comprises lateral faces curved to the outside and in the radius R E corner regions curved to the outside.
4. The fuel pump according to Claim 1 or 2, characterized in that the regular convex polygonal contour is designed as tetragon or pentagon.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008043991.6 | 2008-11-21 | ||
| DE102008043991A DE102008043991A1 (en) | 2008-11-21 | 2008-11-21 | Fuel pump for internal combustion engines |
| PCT/EP2009/065180 WO2010057838A2 (en) | 2008-11-21 | 2009-11-13 | Fuel pump for internal combustion engines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2747074A1 true CA2747074A1 (en) | 2010-05-27 |
Family
ID=42114315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2747074A Abandoned CA2747074A1 (en) | 2008-11-21 | 2009-11-13 | Fuel pump for internal combustion engines |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20110223049A1 (en) |
| EP (1) | EP2359004A2 (en) |
| CN (1) | CN102239333A (en) |
| CA (1) | CA2747074A1 (en) |
| DE (1) | DE102008043991A1 (en) |
| WO (1) | WO2010057838A2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074741B (en) * | 2013-03-26 | 2017-09-29 | 德昌电机(深圳)有限公司 | Fluid pump |
| FR3013406A1 (en) * | 2013-11-15 | 2015-05-22 | Peugeot Citroen Automobiles Sa | MECHANICAL COUPLING ARRANGEMENT FOR A DRIVE PIECE WITH A DRIVE PIECE, A PETROL PUMP FOR A MOTOR VEHICLE AND A MOTOR VEHICLE, COMPRISING SUCH AN ARRANGEMENT |
| BE1030550B1 (en) * | 2022-05-23 | 2023-12-18 | Safran Aero Boosters | COUPLING BY POLYGONAL PROFILES OF PUMPS IN A LUBRICATION GROUP |
Family Cites Families (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1669411A (en) * | 1926-08-28 | 1928-05-15 | Duston And Clark Engineering C | Rolling mill |
| AT185926B (en) * | 1953-05-16 | 1956-06-25 | Saurer Ag Adolph | Cast rotor for rotary lobe compressors |
| US2880676A (en) * | 1956-03-26 | 1959-04-07 | Succop Anna Louise | Motor and pump combination |
| US3196800A (en) * | 1962-12-13 | 1965-07-27 | Parker Hannifin Corp | Gear pump |
| GB1174066A (en) * | 1966-12-31 | 1969-12-10 | Otto Eckerle | Improvements in and relating to Driving Gears for Internal Gear Pumps |
| US3372646A (en) * | 1967-03-20 | 1968-03-12 | Borg Warner | Contaminant resistant fluid supply system |
| US4340317A (en) * | 1981-05-07 | 1982-07-20 | Northern Research & Engineering Corp. | Splineless coupling means |
| EP0098777A3 (en) * | 1982-07-01 | 1984-07-11 | The Bendix Corporation | Coupling arrangement for driving and driven members |
| DE3413773C1 (en) * | 1984-04-12 | 1985-06-27 | Danfoss A/S, Nordborg | Hydraulic vane machine |
| DE3538950A1 (en) * | 1984-11-23 | 1986-06-05 | Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid | Viscose pump, especially gear pump |
| CN87200648U (en) * | 1987-01-14 | 1987-11-25 | 田澍藩 | Internal mesh and outward rotary string rotor pump |
| DE3940314A1 (en) * | 1988-12-08 | 1990-06-13 | Zahnradfabrik Friedrichshafen | Drive with gear hub and shaft joint - has solid shaft with bored ends to limit overload torque |
| JP3667034B2 (en) * | 1996-07-17 | 2005-07-06 | 光洋精工株式会社 | Electric pump |
| DE19648996A1 (en) * | 1996-11-27 | 1998-06-10 | Ford Global Tech Inc | Polygon connection of a hub with a shaft |
| DE19726794A1 (en) * | 1997-06-24 | 1999-01-07 | Elektra Beckum Ag | Water high pressure cleaning device |
| EP0903465B1 (en) * | 1997-09-19 | 2003-09-03 | ABB Turbo Systems AG | Compressor wheel-shaft connection for high speed turbomachinery |
| DE29916106U1 (en) * | 1999-09-15 | 2001-01-25 | ASF THOMAS INDUSTRIES GMBH, 87700 Memmingen | Pump with pump housing |
| DE10014548A1 (en) * | 2000-03-23 | 2001-09-27 | Bosch Gmbh Robert | Gear pump for feeding liquid has connection between coupling cavity and compression cavity |
| US6461111B1 (en) * | 2000-08-25 | 2002-10-08 | Ingersoll-Rand Company | Tapered polygon coupling |
| AU2003271527A1 (en) * | 2003-09-11 | 2005-04-06 | Siemens Aktiengesellschaft | Three-phase synchronous machine comprising a permanent magnet rotor and an induction cage |
| JP2005146994A (en) * | 2003-11-17 | 2005-06-09 | Hitachi Ltd | Oil pump |
| DE102005021597A1 (en) * | 2005-05-10 | 2006-11-16 | Siemens Ag | Fuel pump |
| JP4545072B2 (en) * | 2005-09-09 | 2010-09-15 | 本田技研工業株式会社 | Pump rotor device |
| JP5076484B2 (en) * | 2006-12-19 | 2012-11-21 | 株式会社ジェイテクト | Electric pump unit and electric oil pump |
| EP2122175B1 (en) * | 2007-03-20 | 2015-07-29 | Oerlikon Textile GmbH & Co. KG | Gear wheel pump |
-
2008
- 2008-11-21 DE DE102008043991A patent/DE102008043991A1/en not_active Withdrawn
-
2009
- 2009-11-13 US US13/130,219 patent/US20110223049A1/en not_active Abandoned
- 2009-11-13 EP EP09765055A patent/EP2359004A2/en not_active Withdrawn
- 2009-11-13 WO PCT/EP2009/065180 patent/WO2010057838A2/en active Application Filing
- 2009-11-13 CN CN2009801487002A patent/CN102239333A/en active Pending
- 2009-11-13 CA CA2747074A patent/CA2747074A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| US20110223049A1 (en) | 2011-09-15 |
| WO2010057838A3 (en) | 2010-09-10 |
| WO2010057838A2 (en) | 2010-05-27 |
| EP2359004A2 (en) | 2011-08-24 |
| DE102008043991A1 (en) | 2010-05-27 |
| CN102239333A (en) | 2011-11-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |
Effective date: 20141113 |