EP1026392B1 - Gear pump and electric pump group having such a pump - Google Patents

Gear pump and electric pump group having such a pump Download PDF

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Publication number
EP1026392B1
EP1026392B1 EP00400294A EP00400294A EP1026392B1 EP 1026392 B1 EP1026392 B1 EP 1026392B1 EP 00400294 A EP00400294 A EP 00400294A EP 00400294 A EP00400294 A EP 00400294A EP 1026392 B1 EP1026392 B1 EP 1026392B1
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EP
European Patent Office
Prior art keywords
pump
high pressure
lid
hydraulic
capacitance
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
Application number
EP00400294A
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German (de)
French (fr)
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EP1026392B2 (en
EP1026392A1 (en
Inventor
Christiano Vera
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Hydroperfect International Inc
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Hydroperfect International Inc
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Priority to DE60016643T priority Critical patent/DE60016643T3/en
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Publication of EP1026392B1 publication Critical patent/EP1026392B1/en
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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
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/28—Safety arrangements; Monitoring
    • 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
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0041—Means for damping pressure pulsations
    • 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
    • F02M37/041—Arrangements for driving gear-type pumps

Definitions

  • the invention relates to a hydraulic pump, in particular Electro-pump group, of the type defined in the preamble of claim 1.
  • a hydraulic pump of this type is described in DE 3014280.
  • the pulsation damping device is of the type to membrane, which requires a relatively complex and cumbersome.
  • the object of the invention is to overcome this disadvantage.
  • the hydraulic pump according to the invention has the features that are stated in the characterizing part of claim 1.
  • the pump is indicated in 1 and the motor electrical drive to drive the pump carries the reference 2.
  • the pump is of the gear type.
  • the pump is mounted on a connection flange 3 of the motor by via an interface 4.
  • the pump 1 comprises a central pump body 6 provided a cavity with an oval cross-section 7 in which are rotatably mounted the two pinions 8 and 9 of the gear pump through bearings indicated in 10.
  • the gears mesh with one the other.
  • One of the gables, namely pinion 8, provided with of a driving shaft 17 is rotated by the shaft engine 18 of engine 2 using a device coupling 19.
  • the central pump body 6 further comprises a cavity 21 which extends between the housing cavity 7 of the gears and a peripheral seal 22.
  • the cavity largely surrounds the cavity 7.
  • the cavity 21 is indicated in FIG. the area characterized by small features. This zone is connected to the cavity 7 of the pump by a high passage pump outlet pressure 23 and thus constitutes the zone high pressure of the pump.
  • the parts that are left white and are indicated at 25 in FIG. central pump body 6 constitute the upper face plane of the body.
  • Area 26 of the central ovoid cavity 7, which is characterized by small dots, constitutes the low pressure zone of the pump.
  • a seal 27 isolates this area from the high pressure zone to the of the outlet high pressure passage 23.
  • the pump body 6 is enclosed in a jacket 29 which is fastened at 28, sealingly at the periphery of interface 4.
  • This folder defines a reservoir of low pressure liquid and communicates with the circuit user by an external connection 31.
  • the pump draws liquid from this reservoir 32 through a suction channel 33 and discharges high pressure liquid through the passage 23 in the cavity 21.
  • a domed lid 35 which delimits a pulse damping capacity created during the operation of the pump and houses in in addition to a pressure limiting device 36 and a refill valve 37.
  • the cover is crossed at the periphery by four tie rods 39 that extend also through the central pump body 6 and are screwed into the support block 40 of the interface 4.
  • the Figure 4 shows the damping capacity formed by the internal space 41.
  • the lid has a radially depressed area 42 extending from the periphery to the center that is configured as a hole centering lid 43.
  • the internal space of damping capacity 41 of the lid 35 co-communicates with the high pressure cavity 21 of the central pump body 6.
  • the shapes of the space of cover and cavity correspond to the level of contact surfaces of the capacity and the pump body, the seals 22 and 27 being interposed between these two faces, the seal 22 being supported by the cover.
  • the bottom of the cavity high pressure 21 is pierced in 45 and opens in a vertical channel practiced in the support block 40 of the pump-motor interface 4 and which opens into a channel high pressure outlet 46 opening outward to the periphery of this support block.
  • a deaeration tube 48 extends into the internal space common formed by the capacity space 41 and the cavity 21, vertically from a place near the wall of top 49 of the lid until the piercing 45. Thanks to tube, the liquid which is pumped back by the pump must, for reach the high pressure outlet 46 back up since the high pressure cavity 21 in the space 41 of the cavity hydraulic up to the tube inlet 48 to get off then in the tube 48. Thus the cavity 21 and the capacity 41 are connected in series in the way flow of high pressure liquid and air imprisoned in the capacity will be driven away or driven by the high pressure liquid out of the pump. The tube of deaeration 48 thus ensures effective deaeration of the hydraulic damping capacity.
  • the support block 40 has a cavity important 51 that extends virtually all over its periphery, communicates with the reservoir 32 and whose bottom 52 indicated by dots in Figure 6 forms a important heat exchange surface to effectively evacuate the calories produced by the electronic engine control controller housed in the interface portion 53 located between the support block 40 and the flange of the motor 3 and whose device external electrical connection is indicated in 54.
  • the pressure limiter device Built-in lid and standard configuration is interposed between the high pressure portion of the pump and the tank by opening in it like this is indicated by arrows. It was again indicated in 55 a gauge for checking the level of the liquid in the tank.
  • the invention proposes a solution that is both simple and effective problem of potential residual air in the damping capacity of the pump.
  • Another important advantage of the invention lies in the fact that this damping capacity is implemented under shape of a dome-shaped lid that is directly fixed on the upper face of the central pump body, without interposition of a specific interface device.
  • This feature of the invention and the fact that high pressure cavity is arranged around the part central housing pump sprockets allows to obtain a structure that is simple, compact and therefore not bulky. So the dimensions of the group electropump according to the invention are relatively weak.
  • the large cavity in the support block of the interface that is in communication with the tank ensures an efficient evacuation of the calories produced by the electronic engine control controller.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)

Description

L'invention concerne une pompe hydraulique, notamment de groupe électro-pompe, du type défini dans le préambule de la revendication 1.The invention relates to a hydraulic pump, in particular Electro-pump group, of the type defined in the preamble of claim 1.

Une pompe hydraulique de ce type est décrite dans le document DE 3014280. Dans cette pompe hydraulique le dispositif d'amortissement des pulsations est du type à membrane, ce qui nécessite une structure relativement complexe et encombrante.A hydraulic pump of this type is described in DE 3014280. In this hydraulic pump the pulsation damping device is of the type to membrane, which requires a relatively complex and cumbersome.

L'invention a pour but de palier cet inconvénient.The object of the invention is to overcome this disadvantage.

Pour atteindre ce but, la pompe hydraulique selon l'invention comporte les caractéristiques qui sont énoncées dans la partie caractérisante de la revendication 1.To achieve this goal, the hydraulic pump according to the invention has the features that are stated in the characterizing part of claim 1.

D'autres caractéristiques avantageuses de l'invention sont indiquées dans des revendications dépendantes. Other advantageous features of the invention are indicated in dependent claims.

L'invention sera mieux comprise et d'autres buts, caractéristiques, détails et avantages de celle-ci apparaítront plus clairement dans la description explicative qui va suivre faite en référence aux dessins schématiques annexés donnés uniquement à titre d'exemple illustrant un mode de réalisation de l'invention et dans lesquels.

  • La figure 1 est une vue en coupe axiale le long de la ligne I-I de la figure 2.
  • La figure 2 est une vue en coupe le long de la ligne II-II de la figure 3.
  • La figure 3 est une vue en coupe le long de la ligne III-III de la figure 2.
  • La figure 4 est une vue en coupe le long de la ligne IV-IV de la figure 1.
  • La figure 5 est une vue en coupe le long de la ligne V-V de la figure 3.
  • La figure 6 est une vue en coupe le long de la ligne VI-VI de la figure 1.
    • The invention will be better understood and other objects, characteristics, details and advantages thereof will appear more clearly in the explanatory description which follows, with reference to the appended schematic drawings given solely by way of example illustrating an embodiment. of the invention and in which.
  • FIG. 1 is an axial sectional view along the line II of FIG. 2.
  • Figure 2 is a sectional view along the line II-II of Figure 3.
  • FIG. 3 is a sectional view along the line III - III of FIG. 2.
  • Figure 4 is a sectional view along the line IV-IV of Figure 1.
  • Figure 5 is a sectional view along the line VV of Figure 3.
  • Figure 6 is a sectional view along the line VI-VI of Figure 1.

    • L'invention sera décrite ci-après, à titre d'exemple, dans son application à un groupe électropompe. Sur la figure 1 la pompe est indiquée en 1 et le moteur électrique destiné à entraíner la pompe porte la référence 2. La pompe est du type à engrenage. La pompe est montée sur une bride de raccordement 3 du moteur par l'intermédiaire d'une interface 4.The invention will be described hereinafter, by way of example, in its application to a group electropompe. On the figure 1 the pump is indicated in 1 and the motor electrical drive to drive the pump carries the reference 2. The pump is of the gear type. The pump is mounted on a connection flange 3 of the motor by via an interface 4.

    La pompe 1 comprend un corps central de pompe 6 pourvu d'une cavité présentant une section transversale ovoïdale 7 dans laquelle sont montés rotatifs les deux pignons 8 et 9 de la pompe à engrenage par l'intermédiaire de paliers indiqués en 10. Les pignons engrènent l'un l'autre. L'un des pignons, à savoir le pignon 8, pourvu d'un arbre menant 17 est entraíné en rotation par l'arbre moteur 18 du moteur 2 à l'aide d'un dispositif d'accouplement 19.The pump 1 comprises a central pump body 6 provided a cavity with an oval cross-section 7 in which are rotatably mounted the two pinions 8 and 9 of the gear pump through bearings indicated in 10. The gears mesh with one the other. One of the gables, namely pinion 8, provided with of a driving shaft 17 is rotated by the shaft engine 18 of engine 2 using a device coupling 19.

    Comme le montre la figure 5, le corps central de pompe 6 comporte en outre une cavité 21 qui s'étend entre la cavité 7 de logement des pignons et un joint périphérique d'étanchéité 22. La cavité entoure en grande partie la cavité 7. La cavité 21 est indiquée sur la figure 5 par la zone caractérisée par des petits traits. Cette zone est reliée à la cavité 7 de la pompe par un passage haute pression de sortie de pompe 23 et constitue donc la zone haute pression de la pompe. Les parties qui sont laissées blanches et sont indiquées en 25 sur la figure 5, du corps central de pompe 6 constituent la face supérieure plane du corps. La zone 26 de la cavité ovoïdale centrale 7, qui est caractérisée par des petits points, constitue la zone basse pression de la pompe. Un joint d'étanchéité 27 isole cette zone de la zone haute pression au niveau du passage haute pression de sortie 23.As shown in FIG. 5, the central pump body 6 further comprises a cavity 21 which extends between the housing cavity 7 of the gears and a peripheral seal 22. The cavity largely surrounds the cavity 7. The cavity 21 is indicated in FIG. the area characterized by small features. This zone is connected to the cavity 7 of the pump by a high passage pump outlet pressure 23 and thus constitutes the zone high pressure of the pump. The parts that are left white and are indicated at 25 in FIG. central pump body 6 constitute the upper face plane of the body. Area 26 of the central ovoid cavity 7, which is characterized by small dots, constitutes the low pressure zone of the pump. A seal 27 isolates this area from the high pressure zone to the of the outlet high pressure passage 23.

    Le corps de pompe 6 est enfermé dans une chemise 29 qui est fixée en 28, de façon étanche à la périphérie de l'interface 4. Cette chemise délimite un réservoir de liquide basse pression et communique avec le circuit utilisateur par un raccord extérieur 31. Comme on le voit notamment sur la figure 3, la pompe aspire du liquide de ce réservoir 32 à travers un canal d'aspiration 33 et refoule du liquide haute pression à travers le passage 23 dans la cavité 21.The pump body 6 is enclosed in a jacket 29 which is fastened at 28, sealingly at the periphery of interface 4. This folder defines a reservoir of low pressure liquid and communicates with the circuit user by an external connection 31. As can be seen particularly in FIG. 3, the pump draws liquid from this reservoir 32 through a suction channel 33 and discharges high pressure liquid through the passage 23 in the cavity 21.

    Sur la face supérieure plane 25 du corps de pompe 6 est directement fixé un couvercle en forme de dôme 35 qui délimite une capacité d'amortissement des pulsations créées lors du fonctionnement de la pompe et loge en outre un dispositif de limitation de pression 36 et un clapet de réalimentation 37. Le couvercle est traversé à la périphérie par quatre tirants 39 qui s'étendent également à travers le corps central de pompe 6 et sont vissés dans le bloc support 40 de l'interface 4. La figure 4 montre la capacité d'amortissement formée par l'espace interne 41. On voit également que le couvercle présente une zone radialement enfoncée 42 qui s'étend de la périphérie jusqu'au centre qui est configuré en trou de centrage de couvercle 43.On the upper planar face 25 of the pump body 6 is directly attached a domed lid 35 which delimits a pulse damping capacity created during the operation of the pump and houses in in addition to a pressure limiting device 36 and a refill valve 37. The cover is crossed at the periphery by four tie rods 39 that extend also through the central pump body 6 and are screwed into the support block 40 of the interface 4. The Figure 4 shows the damping capacity formed by the internal space 41. We also see that the lid has a radially depressed area 42 extending from the periphery to the center that is configured as a hole centering lid 43.

    En se référant aux figures 1, 4 et 5, on constate que l'espace interne de capacité d'amortissement 41 du couvercle 35 coommunique avec la cavité haute pression 21 du corps central de pompe 6. Les formes de l'espace de couvercle et de la cavité correspondent au niveau des faces de contact du capacité et du corps de pompe, les joints d'étanchéité 22 et 27 étant interposés entre ces deux faces, le joint 22 étant supporté par le couvercle. Referring to FIGS. 1, 4 and 5, it can be seen that the internal space of damping capacity 41 of the lid 35 co-communicates with the high pressure cavity 21 of the central pump body 6. The shapes of the space of cover and cavity correspond to the level of contact surfaces of the capacity and the pump body, the seals 22 and 27 being interposed between these two faces, the seal 22 being supported by the cover.

    Comme il ressort de la figure 1, le fond de la cavité haute pression 21 est percé en 45 et s'ouvre dans un canal vertical pratiqué dans le bloc support 40 de l'interface pompe-moteur 4 et qui débouche dans un canal de sortie haute pression 46 s'ouvrant vers l'extérieur à la périphérie de ce bloc support.As can be seen in Figure 1, the bottom of the cavity high pressure 21 is pierced in 45 and opens in a vertical channel practiced in the support block 40 of the pump-motor interface 4 and which opens into a channel high pressure outlet 46 opening outward to the periphery of this support block.

    Selon une caractéristique essentielle de l'invention, un tube de désaération 48 s'étend dans l'espace interne commun formé par l'espace de capacité 41 et la cavité 21, verticalement depuis un endroit près de la paroi de sommet 49 du couvercle jusqu'au perçage 45. Grâce ce tube, le liquide qui est refoulé par la pompe doit, pour parvenir à la sortie haute pression 46 remonter depuis la cavité haute pression 21 dans l'espace 41 de la cavité hydraulique jusqu'à l'entrée du tube 48 pour descendre ensuite dans le tube 48. Ainsi la cavité 21 et la capacité 41 sont montées en série dans la voie d'écoulement du liquide haute pression et l'air emprisonné dans la capacité sera chassé ou entraíné pa-r le liquide haute pression hors de la pompe. Le tube de désaération 48 assure donc une désaération efficace de la capacité hydraulique d'amortissement.According to an essential characteristic of the invention, a deaeration tube 48 extends into the internal space common formed by the capacity space 41 and the cavity 21, vertically from a place near the wall of top 49 of the lid until the piercing 45. Thanks to tube, the liquid which is pumped back by the pump must, for reach the high pressure outlet 46 back up since the high pressure cavity 21 in the space 41 of the cavity hydraulic up to the tube inlet 48 to get off then in the tube 48. Thus the cavity 21 and the capacity 41 are connected in series in the way flow of high pressure liquid and air imprisoned in the capacity will be driven away or driven by the high pressure liquid out of the pump. The tube of deaeration 48 thus ensures effective deaeration of the hydraulic damping capacity.

    En se référant notamment aux figures 3 et 4, il s'avère en outre que le bloc support 40 comporte une cavité importante 51 qui s'étend pratiquement sur toute sa périphérie, communique avec le réservoir 32 et dont le fond 52 indiqué par des points sur la figure 6 forme une importante surface d'échange thermique permettant d'évacuer efficacement les calories produits par le contrôleur électronique de pilotage du moteur logé dans la partie d'interface 53 situé entre le bloc support 40 et la bride du moteur 3 et dont le dispositif de connexion électrique extérieur est indiqué en 54. With particular reference to Figures 3 and 4, it turns out in addition that the support block 40 has a cavity important 51 that extends virtually all over its periphery, communicates with the reservoir 32 and whose bottom 52 indicated by dots in Figure 6 forms a important heat exchange surface to effectively evacuate the calories produced by the electronic engine control controller housed in the interface portion 53 located between the support block 40 and the flange of the motor 3 and whose device external electrical connection is indicated in 54.

    Il est à noter que le dispositif limiteur de pression intégré au couvercle et de configuration standard est interposé entre la partie haute pression de la pompe et le réservoir en s'ouvrant dans celui-ci comme cela est indiqué par des flèches. On a encore indiqué en 55 une jauge de contrôle du niveau du liquide dans le réservoir.It should be noted that the pressure limiter device Built-in lid and standard configuration is interposed between the high pressure portion of the pump and the tank by opening in it like this is indicated by arrows. It was again indicated in 55 a gauge for checking the level of the liquid in the tank.

    Il ressort de la description de la structure du groupe électropompe qui est représenté sur les figures, que l'invention propose une solution à la fois simple et efficace du problème posé par de l'air résiduel éventuel dans la capacité d'amortissement de la pompe. Un autre avantage important de l'invention réside dans le fait que cette capacité d'amortissement est mise en oeuvre sous forme d'un couvercle en forme de dôme qui est directement fixé sur la face supérieure du corps central de pompe, sans interposition d'un dispositif interface spécifique. Cette caractéristique de l'invention et le fait que la cavité haute pression est disposée autour de la partie centrale de logement des pignons de la pompe permet d'obtenir une structure à la fois simple, compacte et donc peu encombrante. Ainsi les dimensions du groupe électropompe selon l'invention sont relativement faibles. Enfin, la cavité importante dans le bloc support de l'interface qui est en communication avec le réservoir assure une évacuation efficace des calories produits par le contrôleur électronique de pilotage du moteur.It appears from the description of the structure of the group electropump which is shown in the figures, that the invention proposes a solution that is both simple and effective problem of potential residual air in the damping capacity of the pump. Another important advantage of the invention lies in the fact that this damping capacity is implemented under shape of a dome-shaped lid that is directly fixed on the upper face of the central pump body, without interposition of a specific interface device. This feature of the invention and the fact that high pressure cavity is arranged around the part central housing pump sprockets allows to obtain a structure that is simple, compact and therefore not bulky. So the dimensions of the group electropump according to the invention are relatively weak. Finally, the large cavity in the support block of the interface that is in communication with the tank ensures an efficient evacuation of the calories produced by the electronic engine control controller.

    Claims (10)

    1. A hydraulic pump, notably of an electric unit, of the type comprising a pump body (6) enclosing a gear pump (1) and provided with a suction aperture (33) for a low pressure liquid and with a discharge chamber (21) for a high pressure liquid, which communicates with a high pressure outlet channel (45, 46) connected to a user hydraulic circuit and a device for damping liquid pulsations produced by the pump, characterized in that the pulsation damping device is formed with a hydraulic capacitance (41) positioned in series in the outflow path of the high pressure liquid from the pump (1), between the discharge chamber (21) and the high pressure outlet channel (45, 46) and in that the high pressure liquid by carrying away the trapped air into this capacitance (41) during its flow through the capacitance (41) forms means for deaerating the latter.
    2. The hydraulic pump according to claim 1, characterized in that the dumping capacitance (41) is found above the discharge chamber (21) and an aeration tube (48) extends from the top of the capacitance up to the discharge channel (45, 46).
    3. The hydraulic pump according to any of claims 1 or 2, characterized in that the damping capacitance (41) is formed by a lid (35) directly positioned over the upper face (25) of the pump body (6) so that the lower face of the lid closes the pump body, with interposition of a seal gasket (22, 27) in the faces in contact with the lid (35) and the pump body (6).
    4. The hydraulic pump according to any of claims 1 to 3, characterized in that the high pressure outlet chamber (21) is provided in the central pump body (6) around the housing portion for the gear wheels (8, 9) of the pump.
    5. The hydraulic pump according to any of claims 3 or 4, characterized in that a pressure-limiting device (36) is mounted in the lid (35).
    6. The hydraulic pump according to any of claims 3 to 5, characterized in that a refilling valve (37) is mounted in the lid (38).
    7. The hydraulic pump according to any of claims 2 to 4, characterized in that the lid includes at its center in a depressed area, a hole (43) for centering the lid.
    8. An electric pump unit comprising a gear pump, an electric motor for driving the pump and an interface between the motor and the pump, including a block supporting the pump, characterized in that it includes a hydraulic pump (1) according to any of the preceding claims.
    9. The electric pump unit according to claim 8, characterized in that the high pressure outlet (46) of the pump is provided in the interface support block (40), a bore (45) provided in the bottom of the pump central body (6) connecting the high pressure outlet chamber (21) to the outlet channel (46).
    10. The electric pump unit according to any of claims 8 or 9, wherein the pump central body and the lid are enclosed in an external sleeve fixed on the interface support block and forming a low pressure liquid tank, characterized in that the interface support block includes a cavity (51) communicating with the tank (32) and the bottom (52) of which forms a heat exchanging surface for removing calories produced by the electronic controller for driving the motor housed in an interface portion (53) below the block (40).
    EP00400294A 1999-02-04 2000-02-03 Gear pump and electric pump group having such a pump Expired - Lifetime EP1026392B2 (en)

    Priority Applications (1)

    Application Number Priority Date Filing Date Title
    DE60016643T DE60016643T3 (en) 1999-02-04 2000-02-03 Gear pump and electric pump group provided with such a pump

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9901317A FR2789446B1 (en) 1999-02-04 1999-02-04 HYDRAULIC PUMP OF THE GEAR TYPE AND ELECTRIC PUMP GROUP EQUIPPED WITH SUCH A PUMP
    FR9901317 1999-02-04

    Publications (3)

    Publication Number Publication Date
    EP1026392A1 EP1026392A1 (en) 2000-08-09
    EP1026392B1 true EP1026392B1 (en) 2004-12-15
    EP1026392B2 EP1026392B2 (en) 2012-05-30

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    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP00400294A Expired - Lifetime EP1026392B2 (en) 1999-02-04 2000-02-03 Gear pump and electric pump group having such a pump

    Country Status (5)

    Country Link
    US (1) US6322329B1 (en)
    EP (1) EP1026392B2 (en)
    BR (1) BR0000315A (en)
    DE (1) DE60016643T3 (en)
    FR (1) FR2789446B1 (en)

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    DE60016643T2 (en) 2005-12-01
    US6322329B1 (en) 2001-11-27
    DE60016643D1 (en) 2005-01-20
    DE60016643T3 (en) 2012-12-06
    FR2789446B1 (en) 2002-03-08
    BR0000315A (en) 2000-11-14
    FR2789446A1 (en) 2000-08-11
    EP1026392B2 (en) 2012-05-30
    EP1026392A1 (en) 2000-08-09

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