EP1249609B1 - Pump with self-centering interlocking shaft - Google Patents

Pump with self-centering interlocking shaft Download PDF

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Publication number
EP1249609B1
EP1249609B1 EP20020006304 EP02006304A EP1249609B1 EP 1249609 B1 EP1249609 B1 EP 1249609B1 EP 20020006304 EP20020006304 EP 20020006304 EP 02006304 A EP02006304 A EP 02006304A EP 1249609 B1 EP1249609 B1 EP 1249609B1
Authority
EP
European Patent Office
Prior art keywords
shaft
pump
ring
self
housing
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 - Fee Related
Application number
EP20020006304
Other languages
German (de)
French (fr)
Other versions
EP1249609A1 (en
Inventor
Joachim Schreiber
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.)
ixetic Bad Homburg GmbH
Original Assignee
ixetic Bad Homburg GmbH
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 ixetic Bad Homburg GmbH filed Critical ixetic Bad Homburg GmbH
Publication of EP1249609A1 publication Critical patent/EP1249609A1/en
Application granted granted Critical
Publication of EP1249609B1 publication Critical patent/EP1249609B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F04C15/0073—Couplings between rotors and input or output shafts acting by interengaging or mating parts, i.e. positive coupling of rotor and shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/003—Preventing or minimising internal leakage of working-fluid, e.g. between stages by packing rings; Mechanical seals
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • 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
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/60—Assembly methods
    • F04C2230/603—Centering; Aligning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/70—Disassembly methods
    • 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
    • F04C2240/00—Components
    • F04C2240/60—Shafts
    • 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
    • F05D2300/40—Organic materials
    • F05D2300/43—Synthetic polymers, e.g. plastics; Rubber
    • F05D2300/432—PTFE [PolyTetraFluorEthylene]

Definitions

  • the present invention relates to a pump having a rotor disposed in a pump housing rotatably driven by a drive shaft and rotatably attached to the drive shaft, wherein between the housing and the surface of the shaft acts a sealing ring, on the one hand against the surface of the shaft and on the other hand supported against the pump housing and thus pressed against the surface of the shaft,
  • Pumps of the type in question are designed, for example, as vane or gear pumps and serve to convey a fluid medium, namely gaseous or liquid substances.
  • the delivery unit of the pump comprises a rotor, which in turn is driven by a pump shaft.
  • the pump shaft is rotatably supported within the pump housing by means of bearings.
  • the pump shaft will always be referred to below as the drive shaft.
  • Pumps of the generic type are u.a. used for diesel in motor vehicles.
  • From the DE 198 27 922 A is a generic type pump known.
  • This pump comprises a pump housing and a rotor disposed in the pump housing, which is rotatably driven via a drive shaft and rotatably on the shaft can be plugged. Between the housing and the surface of the shaft acts a sealing ring, which is supported on the one hand against the surface of the shaft and on the other hand against the pump housing and thus pressed against the surface of the shaft.
  • a similar pump is also from the DE 197 17 295 A known.
  • the radial shaft seal provided there, however, is inadequate particularly in the course of temperature, in particular at low temperatures.
  • the present invention is therefore the object of a pump of the generic type to design and further develop that with simple means a sufficiently good radial shaft seal is created. Even at very low temperatures and with increased wave shock, the sealing effect should be sufficient.
  • a generic type pump of the type mentioned is characterized in that the sealing ring comprises an annular body with a circumferential groove and that in the circumferential groove an O-ring is inserted, that the annular body made of PTFE (Teflon) and that the sealing ring is an arcuate Includes sealing lip, which presses against the surface of the shaft.
  • PTFE Teflon
  • the radial shaft sealing ring made of PTFE ensures a good sealing effect even at low temperatures and high waves.
  • PTFE Teflon, registered trademark
  • the radial shaft sealing ring made of PTFE ensures a good sealing effect even at low temperatures and high waves.
  • the use of PTFE is cheaper than the otherwise known in Vitans fuels such as diesel or biodiesel (Rapsölmethylesther, RME) used Vitan.
  • the PTFE shaft seal in the use of poorly lubricious or aggressive media, such as plastic, an advantage.
  • a static seal and for attachment can serve an additional O-ring.
  • the single FIGURE shows a schematic view of an embodiment of a shaft seal according to the invention 22.
  • the shaft seal consists of a ring 22 made of PTFE (Teflon, registered trademark) and has a circumferential groove 26 in which an O-ring 21 is arranged.
  • the shaft sealing ring presses against the surface 27 of the shaft 3 with an arcuate sealing lip 28.
  • the shaft sealing ring is supported against the housing 20 and additionally produces a good static seal through the O-ring 21.
  • the O-ring 21 is due to its bias and resilient contact force in addition to the attachment of the shaft seal.
  • the media page 23 e.g. containing fuel, against the ambient side 24, e.g. against the atmosphere, sealed.
  • Vitan registered trademark
  • a costly chrome plating of the shaft is unnecessary in the starting region of the sealing lip 28, as it is otherwise necessary for some pumps.
  • this seal is resistant to the overpressure that occurs when using a hand pump.
  • the sealing lip 28 can be reinforced by a spring, which is proven especially in tumbling waves.

Description

Die vorliegende Erfindung betrifft eine Pumpe mit einem in einem Pumpengehäuse angeordneten Rotor, der über eine Antriebswelle drehangetrieben und dazu drehfest auf die Antriebswelle aufsteckbar ist, wobei zwischen dem Gehäuse und der Oberfläche der Welle ein Dichtring wirkt, der sich einerseits gegen die Oberfläche der Welle und andererseits gegen das Pumpengehäuse abstützt und sich somit gegen die Oberfläche der Welle presst,The present invention relates to a pump having a rotor disposed in a pump housing rotatably driven by a drive shaft and rotatably attached to the drive shaft, wherein between the housing and the surface of the shaft acts a sealing ring, on the one hand against the surface of the shaft and on the other hand supported against the pump housing and thus pressed against the surface of the shaft,

Pumpen unterschiedlichster Bauart, so beispielsweise Flügelzellenpumpen, sind aus der Praxis hinlänglich bekannt. Lediglich beispielhaft wird dazu auf die DE 198 57 560 A1 verwiesen.Pumps of various types, such as vane pumps, are well known in practice. Only by way of example is on the DE 198 57 560 A1 directed.

Pumpen der hier in Rede stehenden Art sind beispielsweise als Flügelzellen- oder Zahnradpumpen ausgebildet und dienen zur Förderung eines strömungsfähigen Mediums, nämlich von gasförmigen oder flüssigen Stoffen. Die Fördereinheit der Pumpe umfasst einen Rotor, der wiederum über eine Pumpenwelle angetrieben wird. Die Pumpenwelle ist innerhalb des Pumpengehäuses mit Hilfe von Lagern drehbar gehalten. Der Einfachheit halber wird die Pumpenwelle nachfolgend stets als Antriebswelle bezeichnet. Pumpen der gattungsbildenden Art werden u.a. zur Dieselförderung in Kraftfahrzeugen verwendet.Pumps of the type in question are designed, for example, as vane or gear pumps and serve to convey a fluid medium, namely gaseous or liquid substances. The delivery unit of the pump comprises a rotor, which in turn is driven by a pump shaft. The pump shaft is rotatably supported within the pump housing by means of bearings. For the sake of simplicity, the pump shaft will always be referred to below as the drive shaft. Pumps of the generic type are u.a. used for diesel in motor vehicles.

Diese Probleme sind teilweise auch durch die im Stand der Technik verwendeten Wellendichtungen bedingt. Bei tiefen Temperaturen und erhöhtem Wellenschlag ist z.B. bei bekannten Elastomer-Radialwellendichtungen die Dichtwirkung nicht mehr gegeben.These problems are partly due to the shaft seals used in the prior art. At low temperatures and high waves, e.g. in known elastomer radial shaft seals, the sealing effect no longer exists.

Aus der DE 198 27 922 A ist eine gattungsbildende Pumpe bekannt. Diese Pumpe umfasst ein Pumpengehäuse und einen in dem Pumpengehäuse angeordneten Rotor, der über eine Antriebswelle drehangetrieben und dazu drehfest auf der Welle aufsteckbar ist. Zwischen dem Gehäuse und der Oberfläche der Welle wirkt ein Dichtring, der sich einerseits gegen die Oberfläche der Welle und andererseits gegen das Pumpengehäuse abstützt und somit gegen die Oberfläche der Welle presst. Eine ähnliche Pumpe ist auch aus der DE 197 17 295 A bekannt. Die dort vorgesehene Radialwellendichtung ist jedoch insbesondere im Temperaturverlauf, insbesondere bei niedrigen Temperaturen, unzureichend.From the DE 198 27 922 A is a generic type pump known. This pump comprises a pump housing and a rotor disposed in the pump housing, which is rotatably driven via a drive shaft and rotatably on the shaft can be plugged. Between the housing and the surface of the shaft acts a sealing ring, which is supported on the one hand against the surface of the shaft and on the other hand against the pump housing and thus pressed against the surface of the shaft. A similar pump is also from the DE 197 17 295 A known. The radial shaft seal provided there, however, is inadequate particularly in the course of temperature, in particular at low temperatures.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine Pumpe der gattungsbildenden Art derart auszugestalten und weiterzubilden, dass mit einfachen Mitteln eine hinreichend gute Radialwellendichtung geschaffen ist. Auch bei sehr niedrigen Temperaturen und bei erhöhtem Wellenschlag soll die Dichtwirkung hinreichend sein.The present invention is therefore the object of a pump of the generic type to design and further develop that with simple means a sufficiently good radial shaft seal is created. Even at very low temperatures and with increased wave shock, the sealing effect should be sufficient.

Die voranstehende Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst. Danach ist eine gattungsbildende Pumpe der eingangs genannten Art dadurch gekennzeichnet, dass der Dichtring einen Ringkörper mit einer umlaufenden Nut umfasst und dass in die umlaufende Nut ein O-Ring eingesetzt ist, dass der Ringkörper aus PTFE (Teflon) besteht und dass der Dichtring eine bogenförmige Dichtlippe umfasst, die sich gegen die Oberfläche der Welle presst.The above object is solved by the features of claim 1. Thereafter, a generic type pump of the type mentioned is characterized in that the sealing ring comprises an annular body with a circumferential groove and that in the circumferential groove an O-ring is inserted, that the annular body made of PTFE (Teflon) and that the sealing ring is an arcuate Includes sealing lip, which presses against the surface of the shaft.

Mit der Radialwellendichtring aus PTFE (Teflon, eingetragene Marke) wird auch bei niedrigen Temperaturen und erhöhtem Wellenschlag eine gute Dichtwirkung erzielt. Außerdem kann auf eine Beschichtung bzw. Verchromung der Welle im Anlaufbereich des Radialwellendichtrings verzichtet werden, was wiederum Kosten spart. Auch ist die Verwendung von PTFE preisgünstiger als das sonst bekanntermaßen bei Kraftstoffen, wie Diesel oder Biodiesel (Rapsölmethylesther, RME) eingesetzte Vitan.The radial shaft sealing ring made of PTFE (Teflon, registered trademark) ensures a good sealing effect even at low temperatures and high waves. In addition, can be dispensed with a coating or chrome plating of the shaft in the starting region of the radial shaft seal, which in turn saves costs. Also, the use of PTFE is cheaper than the otherwise known in Vitans fuels such as diesel or biodiesel (Rapsölmethylesther, RME) used Vitan.

Insbesondere ist die PTFE-Wellendichtung beim Einsatz von schlecht schmierenden oder aggressiven Medien, wie Kunststoff, von Vorteil. Als statische Dichtung und zur Befestigung kann ein zusätzlicher O-Ring dienen.In particular, the PTFE shaft seal in the use of poorly lubricious or aggressive media, such as plastic, an advantage. As a static seal and for attachment can serve an additional O-ring.

Es gibt nun verschiedene Möglichkeiten, die Lehre der vorliegenden Erfindung in vorteilhafter Weise auszugestalten und weiterzubilden. Dazu ist einerseits auf den einzigen Patentanspruch, andererseits auf die nachfolgende Erläuterung eines Ausführungsbeispiels der Erfindung anhand der Zeichnung verwiesen. In Verbindung mit der Erläuterung des bevorzugten Ausführungsbeispiels der Erfindung anhand der Zeichnung werden auch im Allgemeinen bevorzugte Ausgestaltungen und Weiterbildungen der Lehre erläutert. In der Zeichnung zeigt

die einzige Fig.
in schematischer Ansicht ein Ausführungsbeispiel eines erfindungsgemäßen Wellendichtrings.
There are now various possibilities for designing and developing the teaching of the present invention in an advantageous manner. For this purpose, on the one hand to the single claim, on the other hand, refer to the following explanation of an embodiment of the invention with reference to the drawings. In conjunction with the explanation of the preferred embodiment of the invention with reference to the drawing, generally preferred embodiments and developments of the teaching are explained. In the drawing shows
the only Fig.
a schematic view of an embodiment of a shaft seal according to the invention.

Die einzige Figur zeigt in schematischer Ansicht ein Ausführungsbeispiels eines erfindungsgemäßen Wellendichtrings 22. Der Wellendichtring besteht aus einem Ring 22 aus PTFE (Teflon, eingetragene Marke) und besitzt eine umlaufende Nut 26, in der ein O-Ring 21 angeordnet ist. Der Wellendichtring presst sich mit einer bogenförmigen Dichtlippe 28 gegen die Oberfläche 27 der Welle 3. Auf der anderen Seite stützt sich der Wellendichtring gegen das Gehäuse 20 ab und stellt durch den O-Ring 21 zusätzlich eine gute statische Abdichtung her. Außerdem dient der O-Ring 21 durch seine Vorspannung und federnde Anpresskraft zusätzlich zur Befestigung des Wellendichtrings. Dabei wird die Medienseite 23, z.B. kraftstoffenthaltend, gegen die Umgebungsseite 24, z.B. gegen die Atmosphäre, abgedichtet.The single FIGURE shows a schematic view of an embodiment of a shaft seal according to the invention 22. The shaft seal consists of a ring 22 made of PTFE (Teflon, registered trademark) and has a circumferential groove 26 in which an O-ring 21 is arranged. The shaft sealing ring presses against the surface 27 of the shaft 3 with an arcuate sealing lip 28. On the other side, the shaft sealing ring is supported against the housing 20 and additionally produces a good static seal through the O-ring 21. In addition, the O-ring 21 is due to its bias and resilient contact force in addition to the attachment of the shaft seal. At this time, the media page 23, e.g. containing fuel, against the ambient side 24, e.g. against the atmosphere, sealed.

Im Gegensatz zu bekannten Wellendichtringen, die bei der hier verwendeten "gebauten" Welle 3 (Welle 3 wird an eine nicht dargestellte Nockenwelle eines Verbrennungsmotors montiert) und den dabei auftretenden größeren Spielen oder "Rundlauf-Schlägen" undicht werden, insbesondere bei tiefen Temperaturen, kann die erfindungsgemäße Dichtung mit einer sehr guten Dichtwirkung aufwarten, bei sonst gleicher Funktion und gleichem Bauraum.In contrast to known shaft sealing rings, which in the case of the "built" shaft 3 used here (shaft 3 is mounted on a camshaft, not shown, of an internal combustion engine) and the resulting larger games or "concentric blows", especially at low temperatures, can come up with the seal of the invention with a very good sealing effect, otherwise the same function and the same space.

Ein teurer Werkstoff für Kraftstoffe wie Vitan (eingetragene Marke), ist nicht mehr notwendig. Auch erübrigt sich eine kostenintensive Verchromung der Welle im Anlaufbereich der Dichtlippe 28, wie sie ansonsten bei einigen Pumpen notwendig ist. Auch ist diese Dichtung gegen den Überdruck resistent, der beim Einsatz einer Handpumpe auftritt. Zusätzlich kann die Dichtlippe 28 durch eine Feder verstärkt werden, was sich vor allem bei taumelnden Wellen bewährt.An expensive material for fuels such as Vitan (registered trademark) is no longer necessary. Also, a costly chrome plating of the shaft is unnecessary in the starting region of the sealing lip 28, as it is otherwise necessary for some pumps. Also, this seal is resistant to the overpressure that occurs when using a hand pump. In addition, the sealing lip 28 can be reinforced by a spring, which is proven especially in tumbling waves.

Claims (1)

  1. A pump comprising a rotor (2) located in a pump housing (1), said rotor being rotatively driven by a drive shaft (3) and attachable in a torque proof manner to the drive shaft (3) for such purpose, wherein a seal ring (22) acts between the housing (1) and the surface (27) of the shaft (3), said ring resting on one side against the surface (27) of the shaft (3) and on the other side against the pump housing (1), thereby pressing against the surface (27) of the shaft (3),
    characterized in that the seal ring (22) comprises an annular body with a circumferential groove (26), and that an O-ring (21) is placed into the circumferential groove (26), that the annular body (22) is made of PTFE (Teflon), and that the seal ring (22) comprises a curve-shaped sealing lip (28) that presses against the surface (27) of the shaft (3).
EP20020006304 2001-04-12 2002-03-20 Pump with self-centering interlocking shaft Expired - Fee Related EP1249609B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001118720 DE10118720A1 (en) 2001-04-12 2001-04-12 pump
DE10118720 2001-04-12

Publications (2)

Publication Number Publication Date
EP1249609A1 EP1249609A1 (en) 2002-10-16
EP1249609B1 true EP1249609B1 (en) 2008-04-09

Family

ID=7681678

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020006304 Expired - Fee Related EP1249609B1 (en) 2001-04-12 2002-03-20 Pump with self-centering interlocking shaft

Country Status (2)

Country Link
EP (1) EP1249609B1 (en)
DE (2) DE10118720A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH704333A2 (en) * 2011-01-13 2012-07-13 Mueller Haustechnik Ag M Rotary vane pump for pumping a fluid, in particular for a water with douche.
JP6932312B2 (en) * 2016-11-10 2021-09-08 日本オイルポンプ株式会社 Vane pump

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5478168A (en) * 1977-12-02 1979-06-22 Akitoshi Kitano Vertical displacement type flow meter
US6036453A (en) * 1995-05-09 2000-03-14 Xolox Corporation Pump assembly
JPH1054382A (en) * 1996-08-14 1998-02-24 Mitsubishi Electric Corp Vane type vacuum pump
DE19717295C2 (en) * 1997-04-24 1999-09-23 Danfoss As Fluid machine
JP3656205B2 (en) * 1997-06-25 2005-06-08 株式会社日立製作所 Hydraulic pump for power steering system
DE19857560A1 (en) 1997-12-23 1999-06-24 Luk Fahrzeug Hydraulik Pump unit without own bearing
US6347843B1 (en) * 1998-04-22 2002-02-19 Denso Corporation Pump equipment and method for assembling same
DE50108005D1 (en) * 2000-04-18 2005-12-15 Luk Fahrzeug Hydraulik PUMP
DE20022348U1 (en) * 2000-04-18 2001-09-27 Luk Fahrzeug Hydraulik pump

Also Published As

Publication number Publication date
DE10118720A1 (en) 2002-10-17
EP1249609A1 (en) 2002-10-16
DE50212045D1 (en) 2008-05-21

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