EP0032348B1 - Vortex pump - Google Patents

Vortex pump Download PDF

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Publication number
EP0032348B1
EP0032348B1 EP80401881A EP80401881A EP0032348B1 EP 0032348 B1 EP0032348 B1 EP 0032348B1 EP 80401881 A EP80401881 A EP 80401881A EP 80401881 A EP80401881 A EP 80401881A EP 0032348 B1 EP0032348 B1 EP 0032348B1
Authority
EP
European Patent Office
Prior art keywords
pump
diaphragm
web
turbine
radial
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
Application number
EP80401881A
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German (de)
French (fr)
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EP0032348A1 (en
Inventor
Jean Bourget
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thomson-Brandt SA
Original Assignee
Thomson-Brandt SA
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Filing date
Publication date
Application filed by Thomson-Brandt SA filed Critical Thomson-Brandt SA
Priority to AT80401881T priority Critical patent/ATE5275T1/en
Publication of EP0032348A1 publication Critical patent/EP0032348A1/en
Application granted granted Critical
Publication of EP0032348B1 publication Critical patent/EP0032348B1/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2238—Special flow patterns
    • F04D29/2244—Free vortex
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps

Definitions

  • the present invention relates to a vortex pump for fluid in liquid form.
  • a vortex pump usually comprises in a pump body two superimposed or adjacent chambers, separated by a diaphragm with central opening, one serving as an inlet chamber for the liquid fluid and the other, as a discharge chamber for this fluid.
  • a turbine is mounted, adjacent to the bottom of this delivery chamber. During its rotation, the turbine creates, in the mass of liquid coming from the inlet chamber through the central opening of the diaphragm, a vortex movement which tends to force this mass of liquid to circulate in an outlet pipe arranged in communication tangentially with this delivery chamber.
  • a pump of this type has the advantage of being less subject than a centrifugal pump, to blockage or damage caused by more or less bulky solid elements possibly conveyed by this mass of liquid to be evacuated.
  • One of the vortex pumps is described in the publication FR-A-1 521 265.
  • This pump comprises a pump housing and a motor housing which are assembled to form two adjacent chambers. These two chambers separated from each other by a wall of this pump casing are placed in communication with one another through an orifice formed in this wall.
  • One of these chambers constitutes the turbine compartment connected to an outlet pipe, and the other forms a suction chamber connected to an inlet pipe.
  • known vortex pumps of this type often do not perform well.
  • the present invention provides an improvement to these vortex pumps and makes it possible to produce a pump having excellent efficiency, and easy and economical manufacture.
  • a vortex motor pump for liquid fluid comprises a diaphragm with central opening dividing the pump body into two adjacent compartments, to form an inlet chamber provided with a liquid inlet pipe, and a chamber outlet fitted with a turbine at the bottom, and a tangential liquid outlet pipe, at the level of the space separating these turbine and diaphragm.
  • This diaphragm comprises in particular on its face looking at the turbine, a bar or projecting radial guiding surface, in alignment with the wall on the downstream side, of the bore of the liquid outlet pipe, relative to the direction of rotation of the turbine.
  • the part located downstream of this bar relative to the direction of movement of the general flow of the fluid is filled so as to extend the projecting end of this bar and to gradually bring the level of the latter towards the level of the surface of this diaphragm.
  • the pump 1 is provided with a pump body 3 divided into two superimposed compartments 4 and 5 by a diaphragm 6 with opening central 7.
  • the compartment 4 provided with a liquid inlet pipe 8 is called the inlet chamber
  • the compartment 5 provided with a tangential liquid outlet pipe 9 is called the inlet chamber repression.
  • a turbine 11 is mounted in the pump 1, adjacent to the bottom of the discharge chamber 5.
  • the turbine 11 driven in its rotation by the electric motor 2, creates a vortex movement in the mass of liquid coming from the intake chamber 4 through the central opening 7 of the diaphragm 6.
  • a swirling liquid ring is thus formed between the turbine 11 and the diaphragm 6. In its movement, this liquid ring tends to freely escape through the outlet pipe 9 which is just at the level of the space separating these turbine 11 and diaphragm 6.
  • an improvement in the efficiency of this motor-driven pump is obtained by a reduction in the freedom of movement left to this ring of liquid in vortex, in other words an increase in the flow rate of liquid discharged by the pump is achieved by appropriate guidance of this liquid ring towards the outlet pipe 9.
  • the diaphragm 6 of the latter is provided on its face looking at the turbine 11 which rotates in the direction of the arrow 13 (FIG. 4), with a surface or radial guide bar 12 located in alignment with the wall on the downstream side 14 of the bore of the liquid outlet pipe 9, the wall on the upstream side of this pipe 9 relative to the direction of rotation of the arrow 13 , being designated in 15.
  • the part 16 of the diaphragm 6 which is located downstream of this projecting radial bar 12 in relation to the direction of the arrow 13, in other words in the direction of movement of the general flow of fluid, is filled so as to extend circularly the projecting end of this radial bar 12 and gradually bring the level of the latter towards the level of the surface of the diaphragm ( Figure 3).
  • the part 16 thus produced makes it possible to minimize the pressure drops in the movement of the ring of liquid in a vortex and thereby to further improve the efficiency of the pump 1.
  • the projecting radial bar 12 and the filled part 16 of the diaphragm 6 are obtained by a permanent deformation of the body of this diaphragm 6.
  • This deformation has a rib on one face of this diaphragm protruding and on the other side, a corresponding depression.
  • the diaphragm 6 can be produced either according to the stamping technique or according to the molding process.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Reciprocating Pumps (AREA)

Abstract

1. Driven whirler pump for liquid fluid, having a pump body divided into two adjacent compartments by a diaphragm (6) having a central opening for forming an input chamber (4) and an output chamber (5) procided with a turbine (11), a tangential liquid outlet tube (9) and a radial projecting guiding surface or web (12) aligned with the wall (14) on the downstream side of the bore of the liquid outlet tube (9) with respect to the rotational sense (13) of the pump turbine, characterized in that said radial projecting guiding surface or web (12) is formed in the diaphragm (6) of the pump and in that the downstream portion (16) of said radial projecting guiding surface or web with respect to the displacement sense of the general fluid flow is filled in a manner to extend the projecting end of said radial web (12) and to gradually approach the level of the latter to the level of the diaphragm surface.

Description

La présente invention concerne une pompe à tourbillon pour fluide sous forme de liquide.The present invention relates to a vortex pump for fluid in liquid form.

Une pompe à tourbillon comprend habituellement dans un corps de pompe deux chambres superposées ou adjacentes, séparées par un diaphragme à ouverture centrale, l'une servant de chambre d'admission du fluide liquide et l'autre, de chambre de refoulement de ce fluide. Une turbine est montée, adjacente au fond de cette chambre de refoulement. Lors de sa rotation, la turbine crée, dans la masse de liquide venant de la chambre d'admission par l'ouverture centrale du diaphragme, un mouvement tourbillonnaire qui tend à forcer cette masse de liquide à circuler dans une conduite de sortie disposée en communication tangentiellement avec cette chambre de refoulement. Une pompe de ce type a l'avantage d'être moins sujette qu'une pompe centrifuge, au blocage ou endommagement provoqué par des éléments solides plus ou moins encombrants éventuellement véhiculés par cette masse de liquide à évacuer.A vortex pump usually comprises in a pump body two superimposed or adjacent chambers, separated by a diaphragm with central opening, one serving as an inlet chamber for the liquid fluid and the other, as a discharge chamber for this fluid. A turbine is mounted, adjacent to the bottom of this delivery chamber. During its rotation, the turbine creates, in the mass of liquid coming from the inlet chamber through the central opening of the diaphragm, a vortex movement which tends to force this mass of liquid to circulate in an outlet pipe arranged in communication tangentially with this delivery chamber. A pump of this type has the advantage of being less subject than a centrifugal pump, to blockage or damage caused by more or less bulky solid elements possibly conveyed by this mass of liquid to be evacuated.

Une des pompes à tourbillon est décrite dans la publication FR-A-1 521 265. Cette pompe comprend un carter de pompe et un carter de moteur qui sont assemblés pour former deux chambres adjacentes. Ces deux chambres séparées l'une de l'autre par une paroi de ce carter de pompe sont mises en communication entre elles à travers un orifice formé dans cette paroi. L'une de ces chambres constitue le compartiment de turbine relié à une tubulure de sortie, et l'autre forme une chambre d'aspiration reliée à un tubulure d'entrée. Cependant les pompes à tourbillon connues de ce type n'ont pas souvent un bon rendement.One of the vortex pumps is described in the publication FR-A-1 521 265. This pump comprises a pump housing and a motor housing which are assembled to form two adjacent chambers. These two chambers separated from each other by a wall of this pump casing are placed in communication with one another through an orifice formed in this wall. One of these chambers constitutes the turbine compartment connected to an outlet pipe, and the other forms a suction chamber connected to an inlet pipe. However, known vortex pumps of this type often do not perform well.

Pour améliorer le rendement une solution a été proposée et décrite dans la publication GB-A-1 045136. Cette solution consiste dans une pompe à tourbillon, à allonger radialement vers l'intérieur, la paroi latérale de la chambre à turbine dans sa partie se trouvant au dessus du niveau de cette turbine pour former un déflecteur visant à mieux guider le courant de liquide vers la tubulure de sortie. Malgré cette modification, le rendement de la pompe reste peu satisfaisant. En outre, cette solution présente également des inconvénients. En effet une réalisation d'un déflecteur par un allongement de la paroi latérale de la chambre à turbine entraîne soit une délicate mise en oeuvre dans le cas d'une fabrication de la pompe par moulage soit une augmentation du coût de fabrication dans le cas d'un déflecteur rapporté et fixé sur la paroi de la chambre à turbine.To improve the yield, a solution has been proposed and described in publication GB-A-1 045136. This solution consists in a vortex pump, to lengthen radially inwards, the side wall of the turbine chamber in its part located above the level of this turbine to form a deflector aimed at better guiding the flow of liquid towards the outlet pipe. Despite this modification, the efficiency of the pump remains unsatisfactory. In addition, this solution also has drawbacks. Indeed an embodiment of a deflector by an elongation of the side wall of the turbine chamber leads either to a delicate implementation in the case of a manufacture of the pump by molding or to an increase in the manufacturing cost in the case of '' a deflector attached and fixed to the wall of the turbine chamber.

La présente invention apporte un perfectionnement à ces pompes à tourbillon et permet de réaliser une pompe présentant un excellent rendement, et une fabrication facile et économique.The present invention provides an improvement to these vortex pumps and makes it possible to produce a pump having excellent efficiency, and easy and economical manufacture.

Selon l'invention, une motopompe à tourbillon pour fluide liquide, comprend un diaphragme à ouverture centrale divisant le corps de pompe en deux compartiments adjacents, pour former une chambre d'admission munie d'une tubulure d'entrée de liquide, et une chambre de refoulement pourvue d'une turbine dans le fond, et d'une tubulure tangentielle de sortie de liquide, au niveau de l'espace séparant ces turbine et diaphragme. Ce diaphragme comprend en particulier sur sa face regardant la turbine, une barrette ou surface radiale saillante de guidage, en alignement avec la paroi du côté aval, de l'alésage de la tubulure de sortie de liquide, par rapport au sens de rotation de la turbine. Cette barrette ou surface radiale de guidage disposée en travers du trajet de l'anneau de liquide en tourbillon dans la chambre de refoulement, oblige celui-ci à se refluer dans la tubulure de sortie de liquide de la pompe. Dans ce diaphragme, la partie se trouvant en aval de cette barrette par rapport au sens de déplacement du courant général du fluide est remplie de manière à prolonger l'extrémité saillante de cette barrette et à amener graduellement le niveau de cette dernière vers le niveau de la surface de ce diaphragme.According to the invention, a vortex motor pump for liquid fluid, comprises a diaphragm with central opening dividing the pump body into two adjacent compartments, to form an inlet chamber provided with a liquid inlet pipe, and a chamber outlet fitted with a turbine at the bottom, and a tangential liquid outlet pipe, at the level of the space separating these turbine and diaphragm. This diaphragm comprises in particular on its face looking at the turbine, a bar or projecting radial guiding surface, in alignment with the wall on the downstream side, of the bore of the liquid outlet pipe, relative to the direction of rotation of the turbine. This bar or radial guide surface arranged across the path of the ring of liquid in a vortex in the discharge chamber, forces the latter to flow back into the liquid outlet pipe of the pump. In this diaphragm, the part located downstream of this bar relative to the direction of movement of the general flow of the fluid is filled so as to extend the projecting end of this bar and to gradually bring the level of the latter towards the level of the surface of this diaphragm.

Un mode particulier de réalisation de la barrette radiale saillante apparait dans la revendication dépendante.A particular embodiment of the projecting radial bar appears in the dependent claim.

Pour mieux faire comprendre l'invention, on décrit ci-après un exemple de réalisation illustré par des dessins ci-annexés dont

  • - la figure 1 représente une vue schématique, en coupe partielle, d'une motopompe à tourbillon, réalisée selon l'invention;
  • - la figure 2 représente une vue de la première face du diaphragme de la motopompe de la figure 1, face regardant la turbine de celle-ci;
  • - la figure 3 représente une vue du diaphragme de la figure 2, en coupe suivant un plan III-III; et
  • - la figure 4 représente une vue, en bout, de la motopompe de la figure 1, le couvercle de la pompe étant enlevé pour montrer la deuxième face du diaphragme qui est déjà illustré dans la figure 2, et la position de ce diaphragme par rapport aux tubulures d'entrée et de sortie de liquide de cette pompe.
To better understand the invention, an embodiment is illustrated below illustrated by the attached drawings,
  • - Figure 1 shows a schematic view, in partial section, of a vortex motor pump, produced according to the invention;
  • - Figure 2 shows a view of the first face of the diaphragm of the motor pump of Figure 1, face looking at the turbine thereof;
  • - Figure 3 shows a view of the diaphragm of Figure 2, in section along a plane III-III; and
  • - Figure 4 shows an end view of the motor pump of Figure 1, the pump cover being removed to show the second face of the diaphragm which is already illustrated in Figure 2, and the position of this diaphragm with respect to to the liquid inlet and outlet pipes of this pump.

La motopompe à tourbillon pour liquide, illustrée dans la figure 1 comprend une pompe 1 et un moteur d'entraînement 2. La pompe 1 est pourvue d'un corps de pompe 3 divisé en deux compartiments superposés 4 et 5 par un diaphragme 6 à ouverture centrale 7. Le compartiment 4 muni d'une tubulure d'entrée de liquide 8 est appelé chambre d'admission, et le compartiment 5 muni d'une tubulure tangentielle de sortie de liquide 9 est appelé chambre de refoulement. Une turbine 11 est montée dans la pompe 1, adjacente au fond de la chambre de refoulement 5. La turbine 11 entraînée dans sa rotation par le moteur électrique 2, crée un mouvement tourbillonnaire dans la masse de liquide venant de la chambre d'admission 4 à travers l'ouverture centrale 7 du diaphragme 6. Un anneau de liquide en tourbillon se forme ainsi entre la turbine 11 et le diaphragme 6. Dans son mouvement, cet anneau de liquide tend librement à s'évacuer par la tubulure de sortie 9 qui se trouve juste au niveau de l'espace séparant ces turbine 11 et diaphragme 6.The vortex motor pump for liquid, illustrated in FIG. 1 comprises a pump 1 and a drive motor 2. The pump 1 is provided with a pump body 3 divided into two superimposed compartments 4 and 5 by a diaphragm 6 with opening central 7. The compartment 4 provided with a liquid inlet pipe 8 is called the inlet chamber, and the compartment 5 provided with a tangential liquid outlet pipe 9 is called the inlet chamber repression. A turbine 11 is mounted in the pump 1, adjacent to the bottom of the discharge chamber 5. The turbine 11 driven in its rotation by the electric motor 2, creates a vortex movement in the mass of liquid coming from the intake chamber 4 through the central opening 7 of the diaphragm 6. A swirling liquid ring is thus formed between the turbine 11 and the diaphragm 6. In its movement, this liquid ring tends to freely escape through the outlet pipe 9 which is just at the level of the space separating these turbine 11 and diaphragm 6.

Selon l'invention une amélioration du rendement de cette motopompe est obtenue par une diminution de la liberté de mouvement laissée à cet anneau de liquide en tourbillon, autrement- dit une augmentation du débit de liquide refoulé par la pompe est atteinte par un guidage approprié de cet anneau de liquide vers la tubulure de sortie 9.According to the invention, an improvement in the efficiency of this motor-driven pump is obtained by a reduction in the freedom of movement left to this ring of liquid in vortex, in other words an increase in the flow rate of liquid discharged by the pump is achieved by appropriate guidance of this liquid ring towards the outlet pipe 9.

Selon l'exemple illustré pour réaliser une amélioration de rendement de la pompe 1, le diaphragme 6 de celle-ci est muni sur sa face regardant la turbine 11 qui tourne dans le sens de la flèche 13 (figure 4), d'une surface ou barrette radiale de guidage 12 située dans l'alignement de la paroi du côté aval 14 de l'alésage de la tubulure de sortie de liquide 9, la paroi du côté amont de cette tubulure 9 par rapport au sens de rotation de la flèche 13, étant désignée en 15.According to the example illustrated to achieve an improvement in the efficiency of the pump 1, the diaphragm 6 of the latter is provided on its face looking at the turbine 11 which rotates in the direction of the arrow 13 (FIG. 4), with a surface or radial guide bar 12 located in alignment with the wall on the downstream side 14 of the bore of the liquid outlet pipe 9, the wall on the upstream side of this pipe 9 relative to the direction of rotation of the arrow 13 , being designated in 15.

Quand la turbine 11 tourne dans le sens de la flèche 13, l'anneau de liquide en tourbillon formé vient s'écraser sur cette surface ou barrette radiale de guidage 12 qui l'oblige à se refluer dans la tubulure de sortie 9 de manière que le liquide formant cet anneau de liquide a peu de chance de séjourner longtemps dans la chambre de refoulement 5. Le rendement de la pompe est, de ce fait, amélioré. Selon l'invention, la partie 16 du diaphragme 6 qui se trouve en aval de cette barrette radiale saillante de guidage 12 par rapport au sens de la flèche 13, autrement dit au sens de déplacement du courant général de fluide est remplie de manière à prolonger circulairement l'extrémité saillante de cette barrette radiale 12 et à amener graduellement le niveau de cette dernière vers le niveau de la surface du diaphragme (figure 3). La partie 16 ainsi réalisée permet de minimiser les pertes de charge dans le mouvement de l'anneau de liquide en tourbillon et d'améliorer de ce fait, encore l'efficacité de la pompe 1.When the turbine 11 rotates in the direction of arrow 13, the ring of liquid in vortex formed is crushed on this surface or radial guide strip 12 which forces it to flow back into the outlet pipe 9 so that the liquid forming this ring of liquid is unlikely to remain in the delivery chamber 5 for a long time. The efficiency of the pump is thereby improved. According to the invention, the part 16 of the diaphragm 6 which is located downstream of this projecting radial bar 12 in relation to the direction of the arrow 13, in other words in the direction of movement of the general flow of fluid, is filled so as to extend circularly the projecting end of this radial bar 12 and gradually bring the level of the latter towards the level of the surface of the diaphragm (Figure 3). The part 16 thus produced makes it possible to minimize the pressure drops in the movement of the ring of liquid in a vortex and thereby to further improve the efficiency of the pump 1.

Selon l'exemple illustré (figures 1, 2, 3) la barrette radiale saillante 12 et la partie remplie 16 du diaphragme 6 sont obtenues par une déformation permanente du corps de ce diaphragme 6. Cette déformation présente sur une face de ce diaphragme une nervure saillante et sur l'autre face, une dépression correspondante. Selon l'invention le diaphragme 6 peut être réalisé soit suivant la technique d'emboutissage soit selon le procédé de moulage.According to the example illustrated (FIGS. 1, 2, 3) the projecting radial bar 12 and the filled part 16 of the diaphragm 6 are obtained by a permanent deformation of the body of this diaphragm 6. This deformation has a rib on one face of this diaphragm protruding and on the other side, a corresponding depression. According to the invention the diaphragm 6 can be produced either according to the stamping technique or according to the molding process.

Claims (2)

1. Driven whirler pump for liquid fluid, having a pump body divided into two adjacent compartments by a diaphragm (6) having a central opening for forming an input chamber (4) and an output chamber (5) procided with a turbine (11), a tangential liquid outlet tube (9) and a radial projecting guiding surface or web (12) aligned with the wall (14) on the downstream side of the bore of the liquid outlet tube (9) with respect to the rotational sense (13) of the pump turbine, characterized in that said radial projecting guiding surface or web (12) is formed in the diaphragm (6) of the pump and in that the downstream portion (16) of said radial projecting guiding surface or web with respect to the displacement sense of the general fluid flow is filled in a manner to extend the projecting end of said radial web (12) and to gradually approach the level of the latter to the level of the diaphragm surface.
2. Driven pump in accordance with claim 1, characterized in that the radial projecting web (12) and said filled portion (16) downstream from said web (12) are formed in the diaphragm (6) by a permanent deformation of the diaphragm body, said deformation having a projecting fillet on one face of the diaphragm body and a corresponding recess on the other face.
EP80401881A 1980-01-08 1980-12-29 Vortex pump Expired EP0032348B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80401881T ATE5275T1 (en) 1980-01-08 1980-12-29 EDDY PUMP.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8000309 1980-01-08
FR8000309A FR2473131A1 (en) 1980-01-08 1980-01-08 TOURBILLON MOTOR PUMP

Publications (2)

Publication Number Publication Date
EP0032348A1 EP0032348A1 (en) 1981-07-22
EP0032348B1 true EP0032348B1 (en) 1983-11-09

Family

ID=9237323

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Application Number Title Priority Date Filing Date
EP80401881A Expired EP0032348B1 (en) 1980-01-08 1980-12-29 Vortex pump

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EP (1) EP0032348B1 (en)
AT (1) ATE5275T1 (en)
DE (1) DE3065567D1 (en)
ES (1) ES8201274A1 (en)
FR (1) FR2473131A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2204917B (en) * 1987-05-19 1992-01-08 Apv Uk Centrifugal pump
GB2226364B (en) * 1988-12-24 1992-10-28 Skf Gmbh Liquid pump

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH293772A (en) * 1950-04-19 1953-10-15 Gen Electric Centrifugal pump device.
US2764096A (en) * 1952-12-15 1956-09-25 Continental Motors Corp Water pump for internal combustion engine
FR1521265A (en) * 1967-05-02 1968-04-12 Allweiler Ag Circulation pump

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT239064B (en) * 1963-02-08 1965-03-10 Bauer Roehren Pumpen Pump, especially for liquids containing solids

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH293772A (en) * 1950-04-19 1953-10-15 Gen Electric Centrifugal pump device.
US2764096A (en) * 1952-12-15 1956-09-25 Continental Motors Corp Water pump for internal combustion engine
FR1521265A (en) * 1967-05-02 1968-04-12 Allweiler Ag Circulation pump

Also Published As

Publication number Publication date
EP0032348A1 (en) 1981-07-22
ES498345A0 (en) 1981-12-01
DE3065567D1 (en) 1983-12-15
FR2473131A1 (en) 1981-07-10
FR2473131B1 (en) 1983-11-04
ES8201274A1 (en) 1981-12-01
ATE5275T1 (en) 1983-11-15

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