EP1163450B1 - Pump for generating pressure or negative pressure - Google Patents

Pump for generating pressure or negative pressure Download PDF

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Publication number
EP1163450B1
EP1163450B1 EP00918828A EP00918828A EP1163450B1 EP 1163450 B1 EP1163450 B1 EP 1163450B1 EP 00918828 A EP00918828 A EP 00918828A EP 00918828 A EP00918828 A EP 00918828A EP 1163450 B1 EP1163450 B1 EP 1163450B1
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EP
European Patent Office
Prior art keywords
housing cover
pump
pump according
pressure
openings
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
EP00918828A
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German (de)
French (fr)
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EP1163450A1 (en
Inventor
Fritz-Martin Scholz
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.)
Rietschle Werner GmbH and Co KG
Werner Rietschle GmbH and Co KG
Original Assignee
Rietschle Werner GmbH and Co KG
Werner Rietschle GmbH and Co KG
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 Rietschle Werner GmbH and Co KG, Werner Rietschle GmbH and Co KG filed Critical Rietschle Werner GmbH and Co KG
Publication of EP1163450A1 publication Critical patent/EP1163450A1/en
Application granted granted Critical
Publication of EP1163450B1 publication Critical patent/EP1163450B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • 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
    • F04C2/086—Carter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/16—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • 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
    • F04C2220/00—Application
    • F04C2220/10—Vacuum

Definitions

  • the invention relates to a pump for generating pressure or negative pressure according to the preamble of claim 1.
  • GB 2 139 287 A further discloses a hydraulic pump with two meshing gears located in a chamber are located in the lateral surface of the inlet and outlet channels open.
  • the rotors are bilateral, i. at each of the two axle ends, stored.
  • the pump chamber is on both ends by a part of the housing limited. Suction channel and pressure channel open into the lateral surface the pump chamber.
  • a rotary lobe pump in the form of a Roots blower described the two Having rotors which are arranged to fly on two mutually parallel axes are and the continuous transport of various non-compressible flow media enable.
  • the rotors are located in a chamber, the transmission side through a flat plate through which the axes of the two rotors are liquid-tight are guided, and on the side facing away from the transmission through a housing cover is limited, in the lateral surface - radially outward guided - connecting pieces for inlet and outlet are arranged.
  • the invention provides a very powerful pump space-saving and simple construction provided.
  • the housing cover thus has three functions: the frontal Limitation of the pump chamber, the peripheral wall of the pump chamber and the Recording the connection channels.
  • the housing cover can be rational as cast and Molded part can be produced.
  • the pump unit shown in Figure 1 has as an actuator an electric motor 10. This is laterally flanged to a fan cover 12. About a clutch 14 is the electric motor 10 to a fan wheel 16 within the fan hood 12 connected. The fan cover 12 is connected to a transmission housing 18th stated. In the gearbox 18 are two mutually parallel, staggered Shafts 20, 22 stored at one end. The shaft 20 is arranged in alignment with the axis of the electric motor 10 and is directly driven by this. Sitting on the shaft 20 a first, end-toothed gear 24, which with a second, sitting on the shaft 22 end-toothed gear 26 is in mesh.
  • the gear housing 18 forms with its rotors 28, 30th facing surface an end boundary wall of a Pump chamber 32, the rest by a to the Gear housing 18 attached, cup-shaped housing cover 34 is limited.
  • the housing cover 34 limited with his plane inner wall, the pump chamber 32 on the of Transmission housing 18 side facing away from and forms with his Coat the peripheral wall of the pump chamber 32nd
  • the Breakthrough 48 connects the channel 42, which also a first channel section parallel to the inner wall 44, a subsequent, outward oblique to Drive side inclined channel section and a turn to the inner wall 44 parallel channel section having, on the circumference of the housing cover 34 in a Connecting flange 52 opens.
  • the connecting flanges 50, 52 lie on opposite sides of the housing cover at different heights.
  • the flying bearing of the rotors 28, 30 remains in the Area of the free ends of the shafts 22, 24 space for a optimal design of the channels 40, 42 available.
  • the channels 40, 42 in terms of optimal flow conditions and favorable Connection conditions are designed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Saccharide Compounds (AREA)

Abstract

The invention relates to a pump for generating pressure or negative pressure, comprising a chamber having a high pressure branch and a low pressure branch. Two multi-bladed rotors (28, 30) are mounted on two shafts (20, 22) that are staggered relative to one another in the pump chamber (32). A drive mechanism is minted on the front face of the rotors and a housing lid is placed on the opposite side of said rotors. The housing lid (34) is pot-shaped. Both the high pressure branch (42) and the low pressure branch (40) are integrated into the housing lid (34).

Description

Die Erfindung betrifft eine Pumpe zur Erzeugung von Druck oder Unterdruck gemäβ dem Oberbegriff des Anspruchs 1.The invention relates to a pump for generating pressure or negative pressure according to the preamble of claim 1.

Bei Pumpen dieser Bauart greifen die Flügel der Rotoren berührungslos ineinander, so daß ein schmiermittelfreier Betrieb möglich ist. Die Einsatzbereiche für derartige Pumpen sind daher vielfältig. Wegen der vielfältigen Einsatzmöglichkeiten dieser Pumpen wird eine Optimierung hinsichtlich Baugröße, Gewicht und Herstellungskosten angestrebt.In pumps of this type, the blades of the rotors contact each other without contact, so that a lubricant-free operation is possible. The application areas for Such pumps are therefore diverse. Because of the diverse uses These pumps will optimize in terms of size, weight and Cost of production sought.

Aus der US 4 057 375 ist eine Verdrängerpumpe der eingangs genannten Art bekannt, mit zwei Flügelrädern, die in entgegengesetztem Drehsinn synchron zueinander rotieren und deren Flügel durch ihren kämmenden Eingriff während der Drehbewegung abgetrennte, in ihrem Volumen veränderliche Räume bilden, in denen ein komprimiertes Strömungsmedium von der Niederdruckseite zur Hochdruckseite transportiert wird, wobei das Strömungsmedium in einer Richtung senkrecht zu den beiden Achsen transportiert wird.From US 4 057 375 a positive displacement pump of the type mentioned is known, with two impellers, which rotate in opposite directions of rotation synchronously to each other and their Wing separated by its meshing engagement during the rotational movement, form variable spaces in their volume, in which a compressed flow medium is transported from the low pressure side to the high pressure side, the flow medium being in a direction perpendicular to the two axes is transported.

In der GB 2 139 287 A ist ferner eine hydraulische Pumpe offenbart, mit zwei sich in kämmendem Eingriff befindlichen Zahnrädern, die sich in einer Kammer befinden, in deren Mantelfläche Einlaß- und Auslaßkanäle münden.GB 2 139 287 A further discloses a hydraulic pump with two meshing gears located in a chamber are located in the lateral surface of the inlet and outlet channels open.

Bei diesen Pumpen sind die Rotoren beidseitig, d.h. an jedem der beiden Achsenden, gelagert. Die Pumpenkammer wird auf beiden Stirnseiten durch ein Teil des Gehäuses begrenzt. Saugkanal und Druckkanal münden in die Mantelfläche der Pumpenkammer.In these pumps, the rotors are bilateral, i. at each of the two axle ends, stored. The pump chamber is on both ends by a part of the housing limited. Suction channel and pressure channel open into the lateral surface the pump chamber.

In der EP 0 389 838 A2, eine Drehkolbenpumpe in Form eines Roots-Gebläses beschrieben, das zwei Rotoren aufweist, die auf zwei zueinander parallelen Achsen fliegend angeordnet sind und den kontinuierlichen Transport verschiedener nichtkompressibler Strömungsmedien ermöglichen. Die Rotoren befinden sich in einer Kammer, die getriebeseitig durch eine flache Platte, durch die die Achsen der beiden Rotoren flüssigkeitsdicht geführt sind, und auf der dem Getriebe abgewandten Seite durch einen Gehäusedeckel begrenzt wird, in dessen Mantelfläche - radial nach außen geführt - Anschlußstutzen für Einlaß und Auslaß angeordnet sind.In EP 0 389 838 A2, a rotary lobe pump in the form of a Roots blower described the two Having rotors which are arranged to fly on two mutually parallel axes are and the continuous transport of various non-compressible flow media enable. The rotors are located in a chamber, the transmission side through a flat plate through which the axes of the two rotors are liquid-tight are guided, and on the side facing away from the transmission through a housing cover is limited, in the lateral surface - radially outward guided - connecting pieces for inlet and outlet are arranged.

Durch die Erfindung wird eine sehr leistungfähige Pumpe mit platzsparender und einfacher Konstruktion bereitgestellt.The invention provides a very powerful pump space-saving and simple construction provided.

Dies wird bei einer Pumpe der eingangs genannten Art durch die kennzeichnenden Merkmale des Anspruchs 1 erreicht. Ein einziges Bauteil, der Gehäusedeckel, hat somit drei Funktionen: die stirnseitige Begrenzung der Pumpenkammer, die Umfangswand der Pumpenkammer und die Aufnahme der Anschlußkanäle. Der Gehäusedeckel kann rationell als Guß- und Formteil hergestellt werden.This is in a pump of the type mentioned by the characterizing features of claim 1 achieved. One single component, the housing cover, thus has three functions: the frontal Limitation of the pump chamber, the peripheral wall of the pump chamber and the Recording the connection channels. The housing cover can be rational as cast and Molded part can be produced.

Einzelheiten der Erfindung ergeben sich aus der folgenden Beschreibung einer vorteilhaften Ausführungsform und aus der Zeichnung, auf die Bezug genommen wrid. In der Zeichnung zeigen:

  • Figur 1 eine Seitenansicht eines Pumpenaggregats, das im Bereich des Pumpenteils axial geschnitten dargestellt ist;
  • Figur 2 eine Seitenansicht eines Gehäusedeckels;
  • Figur 3 eine Draufsicht des Gehäusedeckels;
  • Figur 4 eine weitere Seitenansicht des Gehäusedeckels;
  • Figur 5 eine Draufsicht auf die Innenseite des Gehäusedeckels; und
  • Figur 6 einen Schnitt entlang Linie VI-VI in Figur 5.
    • Details of the invention will become apparent from the following description of an advantageous embodiment and from the drawing, to which reference is made. In the drawing show:
  • Figure 1 is a side view of a pump unit, which is shown axially sectioned in the region of the pump part;
  • Figure 2 is a side view of a housing cover;
  • Figure 3 is a plan view of the housing cover;
  • Figure 4 is another side view of the housing cover;
  • Figure 5 is a plan view of the inside of the housing cover; and
  • 6 shows a section along line VI-VI in Figure 5.

    • Das in Figur 1 gezeigte Pumpenaggregat besitzt als Antrieb einen Elektromotor 10. Dieser ist seitlich an eine Ventilatorhaube 12 angeflanscht. Über eine Kupplung 14 ist der Elektromotor 10 an ein Ventilatorrad 16 innerhalb der Ventilatorhaube 12 angeschlossen. Die Ventilatorhaube 12 ist an ein Getriebegehäuse 18 angesetzt. In dem Getriebegehäuse 18 sind zwei zueinander parallele, gegeneinander versetzte Wellen 20, 22 an je einem Ende gelagert. Die Welle 20 ist mit der Achse des Elektromotors 10 fluchtend angeordnet und wird von diesem direkt angetrieben. Auf der Welle 20 sitzt ein erstes, stirnverzahntes Zahnrad 24, das mit einem zweiten, auf der Welle 22 sitzenden stirnverzahnten Zahnrad 26 in Kämmeingriff steht.The pump unit shown in Figure 1 has as an actuator an electric motor 10. This is laterally flanged to a fan cover 12. About a clutch 14 is the electric motor 10 to a fan wheel 16 within the fan hood 12 connected. The fan cover 12 is connected to a transmission housing 18th stated. In the gearbox 18 are two mutually parallel, staggered Shafts 20, 22 stored at one end. The shaft 20 is arranged in alignment with the axis of the electric motor 10 and is directly driven by this. Sitting on the shaft 20 a first, end-toothed gear 24, which with a second, sitting on the shaft 22 end-toothed gear 26 is in mesh.

    Auf den vom Getriebegehäuse 18 abgewandten, ungelagerten Enden der Wellen 20, 22 sitzt je ein zweiflügeliger Rotor 28, 30. Die Flügel der Rotoren 28, 30 sind klauenförmig und in ihrer Geometrie für eine innere Verdichtung ausgelegt. Die Wellen 20, 22 sind in dem Getriebegehäuse 18 beiderseits der Zahnräder 24, 26 auf Kugellagern gelagert, insbesondere auf zweireihigen Schrägkugellagern, wie aus Figur 1 ersichtlich. Dadurch erhalten die Wellen 20, 22 eine sichere Führung und Abstützung im Hinblick auf die fliegende Lagerung der Rotoren.On the facing away from the gear housing 18, unsupported Ends of the shafts 20, 22 each sit a two-bladed rotor 28, 30. The wings of the rotors 28, 30 are claw-shaped and designed in their geometry for internal compression. The shafts 20, 22 are in the transmission housing 18 on both sides the gears 24, 26 mounted on ball bearings, in particular on double-row angular contact ball bearings, as shown in FIG. 1 seen. This gives the shafts 20, 22 a safe Leadership and support with regard to the flying Storage of the rotors.

    Das Getriebegehäuse 18 bildet mit seiner den Rotoren 28, 30 zugewandten Fläche eine stirnseitige Begrenzungswand einer Pumpenkammer 32, die im übrigen durch einen an das Getriebegehäuse 18 angesetzten, topfförmigen Gehäusedeckel 34 begrenzt wird. Der Gehäusedeckel 34 begrenzt mit seiner ebenen Innenwand die Pumpenkammer 32 auf der vom Getriebegehäuse 18 abgewandten Seite und bildet mit seinem Mantel die Umfangswandung der Pumpenkammer 32.The gear housing 18 forms with its rotors 28, 30th facing surface an end boundary wall of a Pump chamber 32, the rest by a to the Gear housing 18 attached, cup-shaped housing cover 34 is limited. The housing cover 34 limited with his plane inner wall, the pump chamber 32 on the of Transmission housing 18 side facing away from and forms with his Coat the peripheral wall of the pump chamber 32nd

    In den Gehäusedeckel 34 sind Kanäle integriert, die den Hochdruck-Anschluß und den Niederdruck-Anschluß der Pumpe bilden. Die Ausgestaltung dieser Kanäle und Anschlüsse ist aus den Figuren 2 bis 6 ersichtlich.In the housing cover 34 channels are integrated, the High-pressure connection and the low-pressure connection of the pump form. The design of these channels and connections is from the figures 2 to 6 can be seen.

    Wie insbesondere aus den Figuren 2 bis 6 ersichtlich ist, sind an der Stirnfläche des Gehäusedeckels 34 Ausbuchtungen 36, 38 gebildet, durch die äußere Begrenzungswandungen von zwei in den Gehäusedeckel integrierten Kanälen 40, 42 verwirklicht sind. In der ebenen Innenwand 44 des Gehäusedeckels 34 sind zwei Durchbrüche 46, 48 gebildet. Von dem Durchbruch 46 geht der Kanal 40 aus. Dieser Kanal 40 hat einen ersten Kanalabschnitt, der parallel zur Innenwand 44 verläuft, einen daran anschließenden Kanalabschnitt, der schräg zur Antriebsseite hin und auswärts geneigt ist, sowie einen an diesen anschließenden, auswärts und parallel zur Innenwand 44 verlaufenden Kanalabschnitt, der am Umfang des Gehäusedeckels 34 in einem Anschlußflansch 50 mündet. An den Durchbruch 48 schließt der Kanal 42 an, der gleichfalls einen ersten, zur Innenwand 44 parallelen Kanalabschnitt, einen daran anschließenden, auswärts schräg zur Antriebsseite hin geneigten Kanalabschnitt sowie einen wiederum zur Innenwand 44 parallelen Kanalabschnitt aufweist, der am Umfang des Gehäusedeckels 34 in einem Anschlußflansch 52 mündet. Die Anschlußflansche 50, 52 liegen auf voneinander abgewandten Seiten des Gehäusedeckels auf unterschiedlicher Höhe.As can be seen in particular from FIGS. 2 to 6, are on the end face of the housing cover 34 bulges 36, 38 formed by the outer boundary walls of two integrated in the housing cover channels 40, 42nd are realized. In the flat inner wall 44 of the Housing cover 34, two openings 46, 48 are formed. From the breakthrough 46 is the channel 40 goes out. This channel 40 has a first channel portion, which is parallel to the inner wall 44th runs, a subsequent channel section, the inclined obliquely to the drive side and outwards, as well one at this subsequent, away and parallel to Inner wall 44 extending channel portion, which at the periphery of Housing cover 34 opens into a connecting flange 50. To the Breakthrough 48 connects the channel 42, which also a first channel section parallel to the inner wall 44, a subsequent, outward oblique to Drive side inclined channel section and a turn to the inner wall 44 parallel channel section having, on the circumference of the housing cover 34 in a Connecting flange 52 opens. The connecting flanges 50, 52 lie on opposite sides of the housing cover at different heights.

    Durch die fliegende Lagerung der Rotoren 28, 30 bleibt im Bereich der freien Enden der Wellen 22, 24 Bauraum für eine optimale Gestaltung der Kanäle 40, 42 verfügbar. Insbesondere können die Kanäle 40, 42 im Hinblick auf optimale Strömungsverhältnisse und günstige Anschlußverhältnisse ausgelegt werden.By the flying bearing of the rotors 28, 30 remains in the Area of the free ends of the shafts 22, 24 space for a optimal design of the channels 40, 42 available. In particular, the channels 40, 42 in terms of optimal flow conditions and favorable Connection conditions are designed.

    Claims (10)

    1. A pump for generating pressure or negative pressure, comprising a pump chamber which has a high-pressure port and a low-pressure port; two rotors (28, 30) having at least two blades and fitted to two parallel shafts (20, 22) in the pump chamber (32) that are offset in relation to each other, the shafts (20, 22) defining an axial direction; a drive arranged on an end face of the rotors (28, 30); and a housing cover (34) arranged on the opposite side, the housing cover (34) being configured cup-shaped and the high-pressure port as well as the low-pressure port being integrated in the housing cover (34), the housing cover (34) having two openings (46, 48) for the high-pressure and low-pressure ports, respectively, and each of the openings (46, 48) being adjoined by one channel (40, 42) which is integrated in the body of the housing cover (34), characterized in that the entirety of the medium to be pumped flows through the openings (46, 48), the openings (46, 48) being formed as axial openings in the inner wall (44) delimiting the pump chamber (32) on an end face, and in that the blade geometry of the rotors (28, 30), adapted to the axial openings (46, 48), is designed for inner compression.
    2. The pump according to claim 1, characterized in that at least one of the channels (40, 42) leads to the circumference of the housing cover (34) and opens out there.
    3. The pump according to claim 2, characterized in that the channel (40, 42) has a first channel section extending in parallelism to the inner wall (44) of the housing cover, adjoining thereto a channel section which is inclined obliquely in a direction away from the inner wall and inclined outwardly, and adjoining thereto a channel section which opens out at the circumference of the housing cover (34) and is parallel to the inner wall thereof.
    4. The pump according to any of the preceding claims, characterized in that two connecting flanges (50, 52) are formed at the circumference of the housing cover (34) on two sides thereof facing away from each other.
    5. The pump according to claim 4, characterized in that the connecting flanges (50, 52) are vertically offset in relation to each other.
    6. The pump according to claim 1, characterized in that at least a substantial part of the circumferential wall of the pump chamber (32) is formed by the envelope of the housing cover (34).
    7. The pump according to claim 1, characterized in that the shafts (20, 22) are supported only on one side, which is the side that faces the drive (10).
    8. The pump according to claim 7, characterized in that the shafts (20, 22) are each supported on both sides of a toothed wheel (24, 26).
    9. The pump according to any of the preceding claims, characterized in that the axial openings (46, 48) are positioned in a middle portion of the inner wall (44) delimiting the pump chamber (32) on an end face.
    10. The pump according to any of the preceding claims, characterized in that the axial opening (48) for the high-pressure port is significantly larger than the axial opening (46) for the low-pressure port.
    EP00918828A 1999-03-22 2000-03-22 Pump for generating pressure or negative pressure Expired - Lifetime EP1163450B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    DE29905249U DE29905249U1 (en) 1999-03-22 1999-03-22 Pump for generating pressure and negative pressure
    DE29905249U 1999-03-22
    PCT/EP2000/002536 WO2000057062A1 (en) 1999-03-22 2000-03-22 Pump for generating pressure or negative pressure

    Publications (2)

    Publication Number Publication Date
    EP1163450A1 EP1163450A1 (en) 2001-12-19
    EP1163450B1 true EP1163450B1 (en) 2004-02-25

    Family

    ID=8071227

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP00918828A Expired - Lifetime EP1163450B1 (en) 1999-03-22 2000-03-22 Pump for generating pressure or negative pressure

    Country Status (9)

    Country Link
    EP (1) EP1163450B1 (en)
    JP (1) JP2002540346A (en)
    KR (1) KR100681804B1 (en)
    CN (1) CN1324239C (en)
    AT (1) ATE260412T1 (en)
    AU (1) AU762304B2 (en)
    DE (2) DE29905249U1 (en)
    HK (1) HK1048844A1 (en)
    WO (1) WO2000057062A1 (en)

    Families Citing this family (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE20216504U1 (en) * 2002-10-25 2003-03-06 Rietschle Werner Gmbh & Co Kg Displacement machine with rotors running in opposite directions
    CN101124404A (en) * 2004-12-28 2008-02-13 李起春 The rotary pump and multiple rotary pump employed thereof

    Family Cites Families (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US4057375A (en) * 1976-10-22 1977-11-08 Nachtrieb Paul W Pump structure
    EP0048095B1 (en) * 1980-09-05 1983-12-14 British Nuclear Fuels PLC Pump for heavy gases
    GB2101687B (en) * 1981-07-15 1984-08-30 British Oxygen Co Ltd Rotary pumping apparatus
    GB2139287A (en) * 1983-05-05 1984-11-07 Dana Corp Gear-type rotary hydraulic machine
    ES2013417A6 (en) * 1989-03-30 1990-05-01 Inoxpa S A Housing for rotary pump.

    Also Published As

    Publication number Publication date
    WO2000057062A1 (en) 2000-09-28
    DE29905249U1 (en) 1999-12-30
    KR100681804B1 (en) 2007-02-15
    HK1048844A1 (en) 2003-04-17
    WO2000057062B1 (en) 2000-12-07
    JP2002540346A (en) 2002-11-26
    AU3963500A (en) 2000-10-09
    AU762304B2 (en) 2003-06-19
    KR20020019892A (en) 2002-03-13
    DE50005415D1 (en) 2004-04-01
    CN1324239C (en) 2007-07-04
    CN1365432A (en) 2002-08-21
    EP1163450A1 (en) 2001-12-19
    ATE260412T1 (en) 2004-03-15

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