EP0291780A1 - Pumpe mit Spaltrohrantrieb - Google Patents

Pumpe mit Spaltrohrantrieb Download PDF

Info

Publication number
EP0291780A1
EP0291780A1 EP19880107267 EP88107267A EP0291780A1 EP 0291780 A1 EP0291780 A1 EP 0291780A1 EP 19880107267 EP19880107267 EP 19880107267 EP 88107267 A EP88107267 A EP 88107267A EP 0291780 A1 EP0291780 A1 EP 0291780A1
Authority
EP
European Patent Office
Prior art keywords
pump according
tank
propeller
cover
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.)
Granted
Application number
EP19880107267
Other languages
English (en)
French (fr)
Other versions
EP0291780B1 (de
Inventor
Guy Delabre
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.)
Comadur SA
Original Assignee
Comadur SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Comadur SA filed Critical Comadur SA
Publication of EP0291780A1 publication Critical patent/EP0291780A1/de
Application granted granted Critical
Publication of EP0291780B1 publication Critical patent/EP0291780B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F04D29/02—Selection of particular materials
    • F04D29/026—Selection of particular materials especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/021—Units comprising pumps and their driving means containing a coupling
    • F04D13/024—Units comprising pumps and their driving means containing a coupling a magnetic coupling
    • F04D13/027—Details of the magnetic circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/40—Transmission of power
    • F05B2260/404—Transmission of power through magnetic drive coupling
    • F05B2260/4041—Transmission of power through magnetic drive coupling the driven magnets encircling the driver magnets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/60—Assembly methods
    • F05D2230/64—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/20—Oxide or non-oxide ceramics
    • F05D2300/21—Oxide ceramics
    • F05D2300/2112—Aluminium oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/20—Oxide or non-oxide ceramics
    • F05D2300/21—Oxide ceramics
    • F05D2300/2118—Zirconium oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/20—Oxide or non-oxide ceramics
    • F05D2300/22—Non-oxide ceramics
    • F05D2300/226—Carbides
    • F05D2300/2261—Carbides of silicon
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/20—Oxide or non-oxide ceramics
    • F05D2300/22—Non-oxide ceramics
    • F05D2300/228—Nitrides
    • F05D2300/2283—Nitrides of silicon

Definitions

  • the subject of the present invention is a magnetic drive pump which comprises a body comprising two parts assembled in a sealed manner, two openings for the inlet and outlet of a liquid to be pumped and connection means for enabling pipes to be connected at the locations of these openings; a rotary device mounted inside this body for sucking the liquid through one of the openings and discharging it through the other; at least one permanent motor magnet placed outside the body; a motor for driving this magnet in rotation about an axis; at least one permanent follower magnet linked to the rotary device for transmitting to the latter the rotational movement of the motor magnet; and fixing means for making the body integral with a fixed part of the engine.
  • the rotary device in which the rotary device can be a propeller, a disc with fins on one of its faces or a gear, are currently used in many fields such as chemistry, medicine, mechanics (for example for polishing with a liquid loaded with abrasive particles), heating and refrigeration or the food industry. They also have more specific applications such as, for example, the supply of fresh or sea water to an aquarium.
  • this drive acts as a clutch and avoids overloads which could damage the engine.
  • Magnetic drive pumps therefore have great advantages over direct drive pumps, but we can still blame them for at least two things.
  • the first is that, given the way they are currently made, they would not be waterproof if we did not provide at least one static joint between the parts of the body which are assembled and if we did not replace this joined more or less frequently.
  • the second is that the same pump can generally only be used to transport certain liquids and not others and this mainly because of the materials which were used to manufacture the body of this pump and the elements which it contains.
  • a pump specially designed to transfer or circulate very corrosive liquids or abrasive liquids may very well not be suitable for more harmless products such as food or pharmaceutical products.
  • the object of the invention is to provide a magnetic drive pump which does not require any seal and therefore practically no maintenance.
  • Another object of the invention is to provide a pump which can be used to pump a wide variety of liquids, both at high and at low temperatures, which is often not the case for pumps of the same kind which currently exist.
  • the assembled parts of the body as well as the rotary device are each made of a ceramic formed mainly of one of the following compounds: alumina (Al2O3), zirconium oxide ( ZrO2), silicon nitride (Si3N4) and silicon carbide (SiC).
  • the pump according to the invention makes it possible to transfer, but almost all of them.
  • alumina ceramic which contains at least 96% by weight of alumina, especially if one calls upon the technique sintering because this operation is then easier than with ceramics whose alumina concentration is lower and especially if the pump must convey products such as pharmaceutical liquids which must in no way lose their purity.
  • white alumina ceramics which currently exist and which can be used, mention may be made, for example, of those which have the following compositions: Al2O3: 96%, SiO2: 3%, other oxides: 1% Al2O3: 99.4%, MgO: 0.3%, other oxides: 0.3% Al2O3: 99.9%, impurities: 0.1%
  • alumina ceramics can also be used. This is the case for example of red, green or blue ceramics which respectively contain chromium (Cr2O3), nickel (Ni nickelO3) and cobalt (Co3O4) oxides and black ceramics which contain several metallic oxides other than that of aluminum, in varying proportions.
  • the pump which has been chosen as an example to illustrate the invention and which can be seen in FIGS. 1 to 3 is a pump whose rotary device is a propeller 2, for example made of alumina ceramic, which the 'is also commonly called a turbine and which could have been produced by using one or the other of the two manufacturing techniques which we discussed above.
  • a propeller 2 for example made of alumina ceramic, which the 'is also commonly called a turbine and which could have been produced by using one or the other of the two manufacturing techniques which we discussed above.
  • this propeller 2 has a bell-shaped shaft 4 which has a hollow cylindrical part 6, surrounded at one of its ends by blades 8, and which is extended on the other side by a part full frustoconical 10 and two successive cylindrical parts 12 and 14, also full, of increasingly smaller diameter, the smallest of which 14 is intended to constitute a pivot for the propeller and the largest 12 a range for this pivot.
  • blades 8 are four in number, which is of course only a possibility, that they are both short, straight and fairly thick, their ends are rounded so as to form portions of the same circle centered on the axis of the shaft 4 and that they are oriented approximately tangentially with respect to another circle with the same center as the previous one, which means that the pump we are describing is not reversible.
  • the cylindrical part 6 has inside a recess 16 which serves as a housing for a permanent magnet also cylindrical 18, for example of ferrite or samarium-cobalt, whose l thickness is equal to the depth of this recess and which is fixed to the propeller by gluing.
  • a permanent magnet also cylindrical 18, for example of ferrite or samarium-cobalt, whose l thickness is equal to the depth of this recess and which is fixed to the propeller by gluing.
  • this cylindrical magnet 18 could very well be replaced by several small magnets in the form of rings and placed side by side.
  • the propeller 4 that we have just described is placed in a body 20 which includes a tank 22 externally cylindrical and fairly thick, which could also be produced made of alumina ceramic, preferably by the pressing and sintering method, and which has both a very flat and perfectly polished edge 24, a bottom 26 with inside a central blind hole 28, in which is engaged the pivot 14 of the propeller, and a wall 30 pierced with two frustoconical holes 32 and 34 which have a decreasing diameter when passing from the inside to the outside of the tank and a turn also perfectly polished and which constitute two openings respectively for the entry and exit of a liquid to be pumped.
  • a tank 22 externally cylindrical and fairly thick, which could also be produced made of alumina ceramic, preferably by the pressing and sintering method, and which has both a very flat and perfectly polished edge 24, a bottom 26 with inside a central blind hole 28, in which is engaged the pivot 14 of the propeller, and a wall 30 pierced with two frustoconical holes 32 and 34 which have
  • the wall 30 has an internal surface which is composed of a cylindrical part located on the edge side 24 and a slightly less frustoconical part which is located on the bottom side 26 and which corresponds to that 10 of the propeller shaft but it is quite clear that this surface could also be completely cylindrical.
  • openings 32 and 34 are located in the same diametral plane and opposite one another as in the figure.
  • the diameter of the cylindrical part of the internal surface of the wall is only very slightly greater than that of the circle circumscribed by the blades of the propeller and, on the other hand, that the outlet opening 34 is close enough to the edge 24 to be in front of these blades and that the opening 32 is more distant so as to open into the free space and sufficiently large that the propeller shaft leaves between it and the wall of the tank.
  • This inlet opening can be located, for example, approximately halfway up the tank.
  • the body 20 also includes a round cover 36, substantially the same diameter as the tank 22 and which closes the latter completely, simply by being pressed against its edge 24 by assembly means which will be described later.
  • This cover 36 which could have been manufactured using the same technique and preferably the same ceramic as for the tank, has the shape of an inverted cap with a wide and flat edge 38 whose thickness is about the same than that of the upper part of the wall of the tank and a cylindrical cap 40 much thinner than this edge 38, which serves as a hub for the propeller 2. It is in fact seen that the hollow cylindrical part 6 of the latter completely surrounds this cap.
  • the means which make it possible to connect pipes 42 and 44 to the pump consist of two identical and entirely removable devices 46 and 48.
  • connection devices consists of a tube 50, respectively 52, also made of ceramic, which has at one of its ends a collar 54, respectively 56, the surface of which has been polished and the frustoconical shape of which corresponds exactly to that of the opening 32, respectively 34, of the wall of the tank 22, in which this collar is engaged and of a mechanical system, placed outside the tank, to exert a substantially axial traction on this tube .
  • the first element is a plastic plate, for example round, 62, respectively 64, which has a notch 66 and which is placed around the tube, between its frustoconical collar 54, respectively 56, and another collar 68, respectively 70, for example cylindrical, which it has in its central part and whose diameter is obviously less than the minimum diameter of the opening 32, respectively 34, of the wall of the tank.
  • the other two elements are screws 72, respectively 74, also made of plastic, which pass through two tapped holes 76, respectively 78, of the plate, located on either side of the tube and whose truncated points come to bear against the wall 28 when the tube is in place.
  • connection devices when the connection devices are mounted, these screws must continue to be tightened after the plate has come up against the collars 68 and 70 to force the surfaces of the other collars 54 and 56 of the tubes to adhere perfectly to the towers holes 32 and 34. Otherwise, the body 2 of the pump would not be waterproof.
  • connection devices it should also be noted that the frustoconical collars 54 and 56 of the tubes are also provided so as not to exceed the internal surface of the tank. For the output device 48 this is a necessity.
  • these means comprise two circular metal flanges 80 and 82, of diameter greater than that of the body 20, which are placed at each end thereof and which are connected together by several bolts 84 which cross and which carry at their ends tightening nuts 86.
  • the means for assembling the tank and the cover are also those which make it possible to mount the body in front of a unidirectional electric motor. 94.
  • this part is simply shown in a part of a fixed element 96 of this motor, for example of a part of a casing or of a chassis, to which the flange 80 is fixed, by suitable means not visible which can be screws, and its output shaft 98 which is surrounded at its end by a permanent magnet cylindrical motor 100, substantially the same length as the follower magnet 18 carried by the propeller and which passes through a central hole 92 of this flange to penetrate inside the cap cylindrical 40 of the cover 36, the axis of this shaft 98 of course coinciding with that of the body 20.
  • the motor magnet 100 can, thanks to the relative thinness of the cap 40 of the cover, easily drive the follower magnet 18 of the propeller in the same direction.
  • the helic since, as already indicated, the helic has a certain play both radial and axial inside the body, as soon as the motor starts to rotate it positions itself automatically so that its axis of rotation coincides exactly with that of the shaft 98 and that the median planes, perpendicular to these axes, of the magnets do the same and if the pump is carried out correctly it is possible that there is no longer then no contact between the propeller and the body and that the latter turns by floating in the pumped liquid.
  • the pump just described has the following advantages: - the parts that make it up are simple and easy to manufacture; - As the connection tubes 46 and 48 are held in place mechanically there is no bonding or brazing operation to be carried out to fix them to the tank; - it is easy to dismantle it completely, for example for cleaning or sterilization; and - it is also easy to change the motor or to add a speed reducer to it.
  • the pumped liquid can only be in contact with ceramic, which means that it can be practically any.
  • FIGS. 5 to 7 are also very close to the embodiment of FIGS. 1 to 3.
  • the cover 36 is no longer constituted by a disc of constant thickness and relatively small compared to that of the tank and the flange 80 in the recess 88 of which the cover is engaged has instead become more thick so that the shaft 98 of the motor 94 which has become much shorter and much larger does not leave the central hole 92 that this flange continues to have and that the end of this shaft is on the contrary at a certain distance of the cover.
  • the shaft 98 must be able to carry at its end a motor magnet in the form of a disc which continues to bear the mark 100 and which is glued inside a recess 104 in which it is only partially housed.
  • cylindrical part 6 of the propeller is no longer hollow and that this propeller also has, on its face opposite the cover, a central recess 106 in which is stuck a permanent follower magnet also in the form of a disc, of diameter substantially equal to that of the motor magnet 100 and which is always designated by the reference 18.
  • this face of the propeller opposite the cover has, on the contrary, several small recesses 108, for example six (see FIG. 7), distributed regularly in a circle centered on the axis of this propeller and in which small follower magnets 18 are housed and as many small motor magnets 100 as the motor shaft 98 carries at its end.
  • Another possibility would be to remove the flanges, to make the tank with a flange around its opening, to provide holes in this flange and in the cover, to assemble the latter and the tank by bolts and nuts and to use these same bolts and other nuts or to use other means to mount the body to the front of the engine.
  • connection devices 46 and 48 could also replace the connection devices 46 and 48 with simple external nozzles made in one piece with the tank or design the pump differently so that the motor magnet is around the follower magnet, like this is already done in some existing magnetic drive pumps, or modify the shape of the propeller to make the pump reversible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP88107267A 1987-05-12 1988-05-06 Pumpe mit Spaltrohrantrieb Expired - Lifetime EP0291780B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8706702A FR2615252A1 (fr) 1987-05-12 1987-05-12 Pompe a entrainement magnetique
FR8706702 1987-05-12

Publications (2)

Publication Number Publication Date
EP0291780A1 true EP0291780A1 (de) 1988-11-23
EP0291780B1 EP0291780B1 (de) 1991-10-23

Family

ID=9351044

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88107267A Expired - Lifetime EP0291780B1 (de) 1987-05-12 1988-05-06 Pumpe mit Spaltrohrantrieb

Country Status (3)

Country Link
EP (1) EP0291780B1 (de)
DE (1) DE3865730D1 (de)
FR (1) FR2615252A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0665378A1 (de) * 1994-01-26 1995-08-02 Le Carbone Lorraine Kreiselpumpe mit magnetischem Antrieb
EP0779699A1 (de) * 1995-12-12 1997-06-18 KSB Aktiengesellschaft Magnetkupplung für eine Kreiselpumpe
WO2000038757A1 (en) * 1998-12-28 2000-07-06 Kriton Medical, Inc. Rotary blood pump with ceramic members
WO2020100690A1 (ja) * 2018-11-13 2020-05-22 パナソニックＩｐマネジメント株式会社 電動ポンプ

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2060899A (en) * 1935-01-10 1936-11-17 Arthur O Russell Rotary pump for corrosive liquids
US3139832A (en) * 1963-07-24 1964-07-07 Alan P Saunders Centrifugal enclosed inert pump
US3306221A (en) * 1965-05-18 1967-02-28 Goodpasture Kenneth Wayne Magnet drive plastic pump
DE1653710A1 (de) * 1967-11-16 1971-12-30 Feldmuehle Ag Kreiselpumpe
US3776660A (en) * 1972-02-22 1973-12-04 Nl Industries Inc Pump for molten salts and metals
DE3413930A1 (de) * 1984-04-13 1985-10-31 Friedrichsfeld Gmbh, Steinzeug- Und Kunststoffwerke, 6800 Mannheim Kreiselpumpe
FR2579199A1 (fr) * 1985-03-22 1986-09-26 Noritake Co Ltd Ceramique a base de zircone

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH066502B2 (ja) * 1985-04-23 1994-01-26 株式会社クボタ アルミナ質セラミツク焼結体

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2060899A (en) * 1935-01-10 1936-11-17 Arthur O Russell Rotary pump for corrosive liquids
US3139832A (en) * 1963-07-24 1964-07-07 Alan P Saunders Centrifugal enclosed inert pump
US3306221A (en) * 1965-05-18 1967-02-28 Goodpasture Kenneth Wayne Magnet drive plastic pump
DE1653710A1 (de) * 1967-11-16 1971-12-30 Feldmuehle Ag Kreiselpumpe
US3776660A (en) * 1972-02-22 1973-12-04 Nl Industries Inc Pump for molten salts and metals
DE3413930A1 (de) * 1984-04-13 1985-10-31 Friedrichsfeld Gmbh, Steinzeug- Und Kunststoffwerke, 6800 Mannheim Kreiselpumpe
FR2579199A1 (fr) * 1985-03-22 1986-09-26 Noritake Co Ltd Ceramique a base de zircone

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DERWENT JAPANESE PATENT GAZETTE, Section Chemical, semaine 8650, résumé no. 86-330021/50, L02, 28 janvier 1987, Derwent Publications Ltd, Londres, GB; & JP-A-61 247 659 (KUBOTA) 04-11-1986 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0665378A1 (de) * 1994-01-26 1995-08-02 Le Carbone Lorraine Kreiselpumpe mit magnetischem Antrieb
EP0779699A1 (de) * 1995-12-12 1997-06-18 KSB Aktiengesellschaft Magnetkupplung für eine Kreiselpumpe
WO2000038757A1 (en) * 1998-12-28 2000-07-06 Kriton Medical, Inc. Rotary blood pump with ceramic members
US6158984A (en) * 1998-12-28 2000-12-12 Kriton Medical, Inc. Rotary blood pump with ceramic members
AU765033B2 (en) * 1998-12-28 2003-09-04 Heartware, Inc. Rotary blood pump with ceramic members
EP1958652A1 (de) * 1998-12-28 2008-08-20 HeartWare, Inc. Rotationsblutpumpe mit keramischen Elementen
WO2020100690A1 (ja) * 2018-11-13 2020-05-22 パナソニックＩｐマネジメント株式会社 電動ポンプ

Also Published As

Publication number Publication date
DE3865730D1 (de) 1991-11-28
EP0291780B1 (de) 1991-10-23
FR2615252A1 (fr) 1988-11-18

Similar Documents

Publication Publication Date Title
EP0388269B1 (de) Kassette für eine peristaltische Pumpe mit quetschbarem Schlauch und peristaltische Pumpe mit einer solchen Kassette
FR2588323A1 (fr) Pompe centrifuge a entrainement magnetique
FR2860698A1 (fr) Pied de mixage et mixeur menager de type plongeant muni d'un tel pied de mixage.
WO2016156757A1 (fr) Ensemble rotor et turbomachine à paliers à gaz comportant un tel ensemble rotor
EP3857685A1 (de) Elektrischer aktuator
FR2787147A1 (fr) Pompe de regeneration a plage de fonctionnement etendue
CH648744A5 (fr) Contre-angle de dentisterie.
FR2557232A1 (fr) Embrayage multidisque dont la lubrification et le refroidissement sont ameliores
EP1803938A1 (de) Hochintegrierte Pumpeneinheit mit elektrischem Motor
FR2541387A1 (fr) Machine hydraulique ou pneumatique notamment formant pompe ou moteur
EP0578538B1 (de) Hahn mit elektrischer Steuerung und mit dichtem Abschlusskörper
FR2494381A1 (fr) Procede et dispositif d'etancheite a ferrofluide pour arbre tournant
WO2001018401A1 (fr) Pompe a entrainement magnetique
EP0291780B1 (de) Pumpe mit Spaltrohrantrieb
EP0810347A1 (de) Untersetzungsgetriebe mit Oldham-Kupplung
FR2752444A1 (fr) Pompe a vide de type a palettes
FR2563580A1 (fr) Pompe electrique rotative, a moteur immerge, a engrenage, avec refroidissement du palier par le carburant pompe
FR2739148A1 (fr) Pompe entrainee magnetiquement
FR2726329A1 (fr) Appareil pour refouler du carburant d'un reservoir dans un moteur a combustion interne
EP0736691B1 (de) Innenzahnradpumpe mit radialen Zuführungsröhren
EP0057123B1 (de) Kupplungsmittel für den Rotor einer Einzelschneckenpumpe
FR2568973A1 (fr) Clapet d'echappement pour pompe rotative a engrenage et moteur immerge pour carburant
FR2609583A3 (fr) Generatrice sans balai comprenant un ensemble inducteur a elements polaires a griffes
FR2953570A1 (fr) Dispositif de fixation d'une helice de ventilateur et ensemble d'une helice et d'un tel dispositif
FR2588322A1 (fr) Machine hydraulique de structure modulaire

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE FR GB IT LI NL

17P Request for examination filed

Effective date: 19890222

17Q First examination report despatched

Effective date: 19900605

RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: COMADUR SA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB IT LI NL

REF Corresponds to:

Ref document number: 3865730

Country of ref document: DE

Date of ref document: 19911128

ITF It: translation for a ep patent filed

Owner name: ING. C. GREGORJ S.P.A.

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19930419

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19930518

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19930522

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19930525

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19930531

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19940506

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19940531

Ref country code: CH

Effective date: 19940531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19941201

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19940506

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19950131

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19950201

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050506