US20040037726A1 - G-rotor pump - Google Patents
G-rotor pump Download PDFInfo
- Publication number
- US20040037726A1 US20040037726A1 US10/453,930 US45393003A US2004037726A1 US 20040037726 A1 US20040037726 A1 US 20040037726A1 US 45393003 A US45393003 A US 45393003A US 2004037726 A1 US2004037726 A1 US 2004037726A1
- Authority
- US
- United States
- Prior art keywords
- rotor
- pump
- pockets
- internal
- external
- 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
Images
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
- 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
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/10—Outer members for co-operation with rotary pistons; Casings
- F01C21/104—Stators; Members defining the outer boundaries of the working chamber
-
- 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
- F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
- F04C13/005—Removing contaminants, deposits or scale from the pump; Cleaning
-
- 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
- F04C2/082—Details specially related to intermeshing engagement type machines or pumps
- F04C2/088—Elements in the toothed wheels or the carter for relieving the pressure of fluid imprisoned in the zones of engagement
-
- 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
- F04C2/082—Details specially related to intermeshing engagement type machines or pumps
- F04C2/084—Toothed wheels
-
- 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
- F04C2230/00—Manufacture
- F04C2230/20—Manufacture essentially without removing material
- F04C2230/22—Manufacture essentially without removing material by sintering
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
Definitions
- the invention relates to a G-rotor pump which is used as a fuel pump in a motor vehicle, and in particular, having an external rotor and an internal rotor moveable relative to the external rotor, in which pump a conveying space is delimited between the external rotor and the internal rotor.
- G-rotor pumps are often also designated as geared pumps or eccentric pumps, and are known from practice.
- the external rotor has an internal toothing and the internal rotor has an external toothing corresponding to the internal toothing.
- the external toothing has one tooth less than the internal toothing, with the result that the conveying space is formed.
- the internal rotor or the external rotor is driven, the external toothing of the internal rotor rolls over the internal toothing of the external rotor.
- the G-rotor pump is therefore usually preceded by a particularly close-mesh filter. Since dirt particles may quickly clog the filter, however, this design leads to a highly cost-intensive maintenance of the G-rotor pump.
- pockets are arranged in the external rotor and/or the internal rotor.
- the dirt particles can collect in the pockets and are consequently kept away from rotor tooth flanks rolling on one another.
- the dirt particles are subsequently flushed out of the pockets or the pockets are permanently filled with the dirt particles.
- the pockets in this case require at least a size corresponding to the quantity of dirt particles located in the flow.
- the G-rotor pump according to the invention has a particularly long service life, even when the liquid to be conveyed is heavily contaminated.
- the G-rotor pump therefore requires no particularly close-mesh filter.
- the G-rotor pump according to the invention is consequently particularly suitable for use as a fuel pump.
- the dirt particles accumulate, as a result of the flow, in the pockets and can remain there if the pockets are designed as depressions arranged in tooth bottoms of the internal rotor.
- the dirt particles can be conveyed out of the pockets in a simple way by the centrifugal forces if the pockets are designed as depressions arranged in the tooth bottoms of the internal rotor.
- the G-rotor pump according one embodiment of the invention has a high capacity for the uptake of dirt particles when the pockets are arranged in all the tooth bottoms of the external rotor or tooth bottoms of the internal rotor.
- a wear of the edges of the internal rotor and of the external rotor can be kept particularly low when the pockets extend over the entire height of the external rotor and/or the internal rotor.
- the pockets can be manufactured in a particularly simple way when they have a groove-shaped design.
- the bottom of the pockets could have an acute-angled or angular design.
- a contribution to simplifying the collection of dirt and the discharge of dirt particles is made when the pockets have a radius in their bottom region. In this case, likewise, the notch effect of the pockets is kept particularly low.
- a contribution to further lengthening the service life of the G-rotor pump according to the invention is made when the external rotor and/or the internal rotor are/is manufactured from metal.
- a contribution to reducing the manufacturing costs of the G-rotor pump according to one embodiment of the invention is made when the external rotor and/or the internal rotor are/is manufactured from plastic.
- the bottom and the cover can be manufactured from plastic and/or sintered metal.
- FIG. 1 shows a longitudinal section through a fuel feed unit with a G-rotor pump according to the invention.
- FIG. 2 shows an enlarged, sectional illustration through the G-rotor pump from FIG. 1 along the line II-II.
- FIG. 3 shows a sectional illustration through another embodiment of the G-rotor pump.
- FIG. 1 shows a fuel feed unit 1 with a housing 3 receiving an electric motor 4 and the G-rotor pump 2 .
- the G-rotor pump 2 has a bottom 5 and a cover 7 held at an intended distance from the bottom 5 via a spacer 6 .
- the spacer 6 and the cover 7 are manufactured in one piece here.
- an internal rotor 9 fastened on a shaft 8 of the electric motor 4 .
- the shaft 8 has, for the rotationally fixed drive of the internal rotor 9 , a flattening 10 and a step 11 .
- the internal rotor 9 can be connected to the shaft 8 in the depicted position.
- the internal rotor 9 has an external toothing 12 , illustrated in FIG. 2, which engages into an internal toothing 13 of an external rotor 14 .
- the cover 7 has an inlet 15 and the bottom 5 an outlet 16 of the G-rotor pump 2 . Fuel is thereby taken in via the cover 7 and flows through the G-rotor pump 2 axially.
- the housing 3 of the fuel feed unit 1 has a connection piece 17 for connecting a line, not illustrated. For clarity, the flows marked by arrows in the drawing.
- FIG. 2 shows an enlarged, sectional illustration through the G-rotor pump 2 from FIG. 1 along the line II-II.
- the external toothing 12 of the internal rotor 9 has one tooth less than the internal toothing 13 of the external rotor 14 . This results in a conveying space 18 , through which the feed liquid is conveyed from the inlet 15 , illustrated in FIG. 1, to the outlet 16 .
- directions of rotation of the internal rotor 9 and of the external rotor 14 are marked by arrows.
- FIG. 3 shows a sectional illustration through another embodiment of the G-rotor pump 2 which, like that from FIG. 2, has an internal rotor 20 with an external toothing 21 and an external rotor 22 with an internal toothing 23 .
- This embodiment differs from that from FIG. 2 in that pockets 24 for the uptake of dirt particles are arranged in the tooth bottoms of the external toothing 21 of the internal rotor 20 .
- tooth bottoms of the internal toothing 23 of the external rotor 22 are made smooth.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
In a G-rotor pump for the conveyance of fuel in a motor vehicle, pockets are arranged in an external rotor. Dirt particles in the fuel can collect in the pockets. A wear of regions of the external rotor and of the internal rotor which roll on one another is consequently kept particularly low.
Description
- This application claims priority to International Application No. 10221784.6, which was filed in the German language on Jun. 4, 2002, which is hereby incorporated by reference.
- The invention relates to a G-rotor pump which is used as a fuel pump in a motor vehicle, and in particular, having an external rotor and an internal rotor moveable relative to the external rotor, in which pump a conveying space is delimited between the external rotor and the internal rotor.
- G-rotor pumps are often also designated as geared pumps or eccentric pumps, and are known from practice. In the conventional G-rotor pump, the external rotor has an internal toothing and the internal rotor has an external toothing corresponding to the internal toothing. The external toothing has one tooth less than the internal toothing, with the result that the conveying space is formed. When the internal rotor or the external rotor is driven, the external toothing of the internal rotor rolls over the internal toothing of the external rotor. When the G-rotor pump is used as a fuel pump, there is often the problem that dirt particles infiltrate between the rotors and lead to their abrasion and consequently to a reduced service life of the G-rotor pump. The G-rotor pump is therefore usually preceded by a particularly close-mesh filter. Since dirt particles may quickly clog the filter, however, this design leads to a highly cost-intensive maintenance of the G-rotor pump.
- One disadvantage of the known G-rotor pump is that it is highly sensitive to dirt particles located in the flow.
- In the invention, pockets are arranged in the external rotor and/or the internal rotor.
- According to one embodiment of the invention, the dirt particles can collect in the pockets and are consequently kept away from rotor tooth flanks rolling on one another. The dirt particles are subsequently flushed out of the pockets or the pockets are permanently filled with the dirt particles. The pockets in this case require at least a size corresponding to the quantity of dirt particles located in the flow. As a result, the G-rotor pump according to the invention has a particularly long service life, even when the liquid to be conveyed is heavily contaminated. The G-rotor pump therefore requires no particularly close-mesh filter. The G-rotor pump according to the invention is consequently particularly suitable for use as a fuel pump.
- According to another embodiment of the invention, the dirt particles accumulate, as a result of the flow, in the pockets and can remain there if the pockets are designed as depressions arranged in tooth bottoms of the internal rotor.
- According to another embodiment of the invention, the dirt particles can be conveyed out of the pockets in a simple way by the centrifugal forces if the pockets are designed as depressions arranged in the tooth bottoms of the internal rotor.
- The G-rotor pump according one embodiment of the invention has a high capacity for the uptake of dirt particles when the pockets are arranged in all the tooth bottoms of the external rotor or tooth bottoms of the internal rotor.
- According to still another embodiment of the invention, a wear of the edges of the internal rotor and of the external rotor can be kept particularly low when the pockets extend over the entire height of the external rotor and/or the internal rotor.
- According to yet another embodiment of the invention, the pockets can be manufactured in a particularly simple way when they have a groove-shaped design. The bottom of the pockets could have an acute-angled or angular design. According to another embodiment of the invention, a contribution to simplifying the collection of dirt and the discharge of dirt particles is made when the pockets have a radius in their bottom region. In this case, likewise, the notch effect of the pockets is kept particularly low.
- A contribution to further lengthening the service life of the G-rotor pump according to the invention is made when the external rotor and/or the internal rotor are/is manufactured from metal.
- A contribution to reducing the manufacturing costs of the G-rotor pump according to one embodiment of the invention is made when the external rotor and/or the internal rotor are/is manufactured from plastic.
- In still another embodiment, as a result of the arrangement of the pockets, the bottom and the cover can be manufactured from plastic and/or sintered metal.
- FIG. 1 shows a longitudinal section through a fuel feed unit with a G-rotor pump according to the invention.
- FIG. 2 shows an enlarged, sectional illustration through the G-rotor pump from FIG. 1 along the line II-II.
- FIG. 3 shows a sectional illustration through another embodiment of the G-rotor pump.
- FIG. 1 shows a
fuel feed unit 1 with ahousing 3 receiving anelectric motor 4 and the G-rotor pump 2. The G-rotor pump 2 has abottom 5 and acover 7 held at an intended distance from thebottom 5 via aspacer 6. Thespacer 6 and thecover 7 are manufactured in one piece here. Between thecover 7 and thebottom 5 is arranged aninternal rotor 9 fastened on ashaft 8 of theelectric motor 4. Theshaft 8 has, for the rotationally fixed drive of theinternal rotor 9, a flattening 10 and astep 11. As a result, theinternal rotor 9 can be connected to theshaft 8 in the depicted position. Theinternal rotor 9 has anexternal toothing 12, illustrated in FIG. 2, which engages into aninternal toothing 13 of anexternal rotor 14. - The
cover 7 has aninlet 15 and thebottom 5 anoutlet 16 of the G-rotor pump 2. Fuel is thereby taken in via thecover 7 and flows through the G-rotor pump 2 axially. Thehousing 3 of thefuel feed unit 1 has aconnection piece 17 for connecting a line, not illustrated. For clarity, the flows marked by arrows in the drawing. - FIG. 2 shows an enlarged, sectional illustration through the G-
rotor pump 2 from FIG. 1 along the line II-II. To simplify the drawing, thehousing 3 and thespacer 6 of the G-rotor pump 2 are not illustrated. Theexternal toothing 12 of theinternal rotor 9 has one tooth less than theinternal toothing 13 of theexternal rotor 14. This results in aconveying space 18, through which the feed liquid is conveyed from theinlet 15, illustrated in FIG. 1, to theoutlet 16. Moreover, In FIG. 2, directions of rotation of theinternal rotor 9 and of theexternal rotor 14 are marked by arrows. In tooth bottoms of theinternal toothing 13 of theexternal rotor 14 are arrangedpockets 19 which extend over the entire height of theexternal rotor 14. Dirt particles located in the feed liquid accumulate in thesepockets 19. This prevents the dirt particles from rubbing against one another on the flanks of theinternal toothing 13 and of theexternal toothing 12. - FIG. 3 shows a sectional illustration through another embodiment of the G-
rotor pump 2 which, like that from FIG. 2, has aninternal rotor 20 with anexternal toothing 21 and anexternal rotor 22 with aninternal toothing 23. This embodiment differs from that from FIG. 2 in thatpockets 24 for the uptake of dirt particles are arranged in the tooth bottoms of theexternal toothing 21 of theinternal rotor 20. By contrast, tooth bottoms of theinternal toothing 23 of theexternal rotor 22 are made smooth. By virtue of this design, when liquid is being conveyed, dirt particles are taken up in thepockets 24 of theinternal rotor 20 and are thrown out again by means of centrifugal forces.
Claims (10)
1. A G-rotor pump used as a fuel pump in a motor vehicle, comprising:
an external rotor; and
an internal rotor moveable relative the external rotor, in which pump a conveying space is delimited between the external rotor and the internal rotor, wherein pockets are arranged in at least one of the external rotor and the internal rotor.
2. The G-rotor pump as claimed in claim 1 , wherein the pockets are designed as depressions arranged in tooth bottoms of the external rotor.
3. The G-rotor pump as claimed in claim 1 , wherein the pockets are designed as depressions arranged in tooth bottoms of the internal rotor.
4. The G-rotor pump as claimed in claim 1 , wherein the pockets are arranged in the tooth bottoms of the external rotor or tooth bottoms of the internal rotor.
5. The G-rotor pump as claimed in claim 1 , wherein the pockets extend over an entire height of the external rotor and/or of the internal rotor.
6. The G-rotor pump as claimed in claim 1 , wherein the pockets have a groove-shaped design.
7. The G-rotor pump as claimed in claim 1 , wherein the pockets have a radius in a bottom region.
8. The G-rotor pump as claimed in claim 1 , wherein at least one of the external rotor and the internal rotor are manufactured from metal.
9. The G-rotor pump as claimed in claim 1 , wherein at least one of the external rotor and the internal rotor are manufactured from plastic.
10. The G-rotor pump as claimed in claim 1 , wherein a bottom plate and a cover of the G-rotor are manufactured from plastic and/or sintered metal.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10224784A DE10224784A1 (en) | 2002-06-04 | 2002-06-04 | G-rotor pump |
DE10224784.6 | 2002-06-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20040037726A1 true US20040037726A1 (en) | 2004-02-26 |
Family
ID=29432632
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/453,930 Abandoned US20040037726A1 (en) | 2002-06-04 | 2003-06-04 | G-rotor pump |
Country Status (5)
Country | Link |
---|---|
US (1) | US20040037726A1 (en) |
EP (1) | EP1369588A1 (en) |
JP (1) | JP2004011641A (en) |
CN (1) | CN1488859A (en) |
DE (1) | DE10224784A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060140790A1 (en) * | 2003-06-16 | 2006-06-29 | Ralf Muehlhausen | G-rotor pump |
GB2443088A (en) * | 2006-10-18 | 2008-04-23 | Concentric Vfp Ltd | Gerotor pump with filling axial rotor slot. |
US20090016912A1 (en) * | 2005-05-10 | 2009-01-15 | Siemens Aktiengesellschaft | Internal Gear Fuel Pump |
CN103026067A (en) * | 2010-03-04 | 2013-04-03 | 罗伯特·博世有限公司 | Internal gear pump |
US8840385B2 (en) | 2011-03-03 | 2014-09-23 | Ti Group Automotive Systems, L.L.C. | Positive displacement fluid pump |
EP3376030A1 (en) * | 2017-03-13 | 2018-09-19 | Delphi Technologies IP Limited | Fluid pump with rotating pumping element wear reduction |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005188399A (en) * | 2003-12-25 | 2005-07-14 | Mitsubishi Materials Corp | Inscribing type gear pump |
JP2006233771A (en) | 2005-02-22 | 2006-09-07 | Mitsubishi Materials Pmg Corp | Pump rotor |
DE102007040724A1 (en) * | 2007-08-29 | 2009-03-05 | Robert Bosch Gmbh | delivery unit |
WO2016149246A1 (en) * | 2015-03-16 | 2016-09-22 | Saudi Arabian Oil Company | Equal-walled gerotor pump for wellbore applications |
DE102015211785A1 (en) * | 2015-06-25 | 2016-12-29 | Bühler Motor GmbH | DC motor for a gear pump |
US11371326B2 (en) | 2020-06-01 | 2022-06-28 | Saudi Arabian Oil Company | Downhole pump with switched reluctance motor |
US11499563B2 (en) | 2020-08-24 | 2022-11-15 | Saudi Arabian Oil Company | Self-balancing thrust disk |
US11920469B2 (en) | 2020-09-08 | 2024-03-05 | Saudi Arabian Oil Company | Determining fluid parameters |
US11644351B2 (en) | 2021-03-19 | 2023-05-09 | Saudi Arabian Oil Company | Multiphase flow and salinity meter with dual opposite handed helical resonators |
US11591899B2 (en) | 2021-04-05 | 2023-02-28 | Saudi Arabian Oil Company | Wellbore density meter using a rotor and diffuser |
US11913464B2 (en) | 2021-04-15 | 2024-02-27 | Saudi Arabian Oil Company | Lubricating an electric submersible pump |
US11994016B2 (en) | 2021-12-09 | 2024-05-28 | Saudi Arabian Oil Company | Downhole phase separation in deviated wells |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2344628A (en) * | 1940-12-26 | 1944-03-21 | Gar Wood Ind Inc | Gear pump |
US2428181A (en) * | 1944-10-27 | 1947-09-30 | Frank C Sibley | Rotary gear pump |
US3289542A (en) * | 1963-10-29 | 1966-12-06 | Lawrence Machine & Mfg Company | Hydraulic motor or pump |
US5368455A (en) * | 1992-01-15 | 1994-11-29 | Eisenmann; Siegfried A. | Gear-type machine with flattened cycloidal tooth shapes |
US5997262A (en) * | 1997-04-10 | 1999-12-07 | Walbro Corporation | Screw pins for a gear rotor fuel pump assembly |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3614626A1 (en) * | 1985-06-07 | 1986-12-11 | Mannesmann Rexroth GmbH, 8770 Lohr | Gear machine |
DE4021500C3 (en) * | 1990-07-05 | 1998-10-22 | Mannesmann Vdo Ag | Delivery unit, in particular for delivering fuel |
DE4200987A1 (en) * | 1992-01-16 | 1993-07-22 | Vittorio Varisco | Gear pump for a variety of liquids - has steel or PTFE disc between rotor and runner |
DE19717295C2 (en) * | 1997-04-24 | 1999-09-23 | Danfoss As | Fluid machine |
DE19726794A1 (en) * | 1997-06-24 | 1999-01-07 | Elektra Beckum Ag | Water high pressure cleaning device |
-
2002
- 2002-06-04 DE DE10224784A patent/DE10224784A1/en not_active Withdrawn
-
2003
- 2003-05-15 EP EP03010932A patent/EP1369588A1/en not_active Withdrawn
- 2003-06-02 JP JP2003156956A patent/JP2004011641A/en not_active Withdrawn
- 2003-06-04 US US10/453,930 patent/US20040037726A1/en not_active Abandoned
- 2003-06-04 CN CNA031580262A patent/CN1488859A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2344628A (en) * | 1940-12-26 | 1944-03-21 | Gar Wood Ind Inc | Gear pump |
US2428181A (en) * | 1944-10-27 | 1947-09-30 | Frank C Sibley | Rotary gear pump |
US3289542A (en) * | 1963-10-29 | 1966-12-06 | Lawrence Machine & Mfg Company | Hydraulic motor or pump |
US5368455A (en) * | 1992-01-15 | 1994-11-29 | Eisenmann; Siegfried A. | Gear-type machine with flattened cycloidal tooth shapes |
US5997262A (en) * | 1997-04-10 | 1999-12-07 | Walbro Corporation | Screw pins for a gear rotor fuel pump assembly |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060140790A1 (en) * | 2003-06-16 | 2006-06-29 | Ralf Muehlhausen | G-rotor pump |
US7591637B2 (en) | 2003-06-16 | 2009-09-22 | Siemens Aktiengesellschaft | G-rotor pump |
US20090016912A1 (en) * | 2005-05-10 | 2009-01-15 | Siemens Aktiengesellschaft | Internal Gear Fuel Pump |
GB2443088A (en) * | 2006-10-18 | 2008-04-23 | Concentric Vfp Ltd | Gerotor pump with filling axial rotor slot. |
GB2443088B (en) * | 2006-10-18 | 2011-10-12 | Concentric Vfp Ltd | Pumps with filling slots |
CN103026067A (en) * | 2010-03-04 | 2013-04-03 | 罗伯特·博世有限公司 | Internal gear pump |
US8840385B2 (en) | 2011-03-03 | 2014-09-23 | Ti Group Automotive Systems, L.L.C. | Positive displacement fluid pump |
EP3376030A1 (en) * | 2017-03-13 | 2018-09-19 | Delphi Technologies IP Limited | Fluid pump with rotating pumping element wear reduction |
US10584701B2 (en) | 2017-03-13 | 2020-03-10 | Delphi Technologies Ip Limited | Fluid pump with rotating pumping element wear reduction |
Also Published As
Publication number | Publication date |
---|---|
JP2004011641A (en) | 2004-01-15 |
EP1369588A1 (en) | 2003-12-10 |
DE10224784A1 (en) | 2003-12-18 |
CN1488859A (en) | 2004-04-14 |
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