EP0378629A1 - Piston pump. - Google Patents

Piston pump.

Info

Publication number
EP0378629A1
EP0378629A1 EP89907131A EP89907131A EP0378629A1 EP 0378629 A1 EP0378629 A1 EP 0378629A1 EP 89907131 A EP89907131 A EP 89907131A EP 89907131 A EP89907131 A EP 89907131A EP 0378629 A1 EP0378629 A1 EP 0378629A1
Authority
EP
European Patent Office
Prior art keywords
piston pump
pump according
damping
damping hose
hose
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
EP89907131A
Other languages
German (de)
French (fr)
Other versions
EP0378629B1 (en
Inventor
Ludwig Budecker
Anton David
Hans-A Guse
Ulrich Zutt
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.)
Continental Teves AG and Co oHG
Original Assignee
Alfred Teves 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 Alfred Teves GmbH filed Critical Alfred Teves GmbH
Publication of EP0378629A1 publication Critical patent/EP0378629A1/en
Application granted granted Critical
Publication of EP0378629B1 publication Critical patent/EP0378629B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F04B11/0008—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using accumulators
    • F04B11/0016—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using accumulators with a fluid spring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F04B11/0008—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using accumulators
    • F04B11/0033—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using accumulators with a mechanical spring

Definitions

  • the invention relates to a piston pump with at least one delivery piston, which conveys pressure medium from a suction chamber via a working chamber into a pressure connection.
  • undesirable noises occur due to pressure pulsation.
  • the aim of the invention is therefore to provide noise damping for piston pumps which is characterized by particularly small space requirements with the best possible damping properties, can be realized in a cost-effective manner with simple means and is easy to maintain and is suitable for use in pumps which are the pressure filling be vented vacuum.
  • This object is achieved according to the invention in that elastic damping elements are arranged in the intake space. In this way, the pressure fluctuations in the suction area of the pump are compensated for directly at the point of origin.
  • a preferred embodiment of the invention provides that the elastic damping element is formed by at least one deformable molded part which has at least one closed, gas-filled chamber.
  • a particularly inexpensive embodiment of the invention can be realized in that the molded part is made of closed-cell foam or rubber. In this way, the elastic means can be particularly easily adapted to the existing intake space geometry.
  • the elastic damping element is a movable wall which delimits a gas space within the suction space. For example, by installing a membrane in the suction area, effective noise reduction can be achieved in a simple manner.
  • the invention provides to form the damping element is designed as an annular rubber hose closed ge '.
  • the damping element interacts with a ring filter element, web-shaped holding arms being provided on the filter element, grasp the damping element at a radial distance with almost the same spacing, the wall delimiting the suction space contributing to securing the position of the damping element. This at the same time ensures simple assembly, disassembly and therefore rapid interchangeability.
  • FIG. 3 shows a concrete embodiment of FIG. 1
  • FIG. 4 shows an overall view of the damping element designed as a damping hose with connecting pieces shown in partial section.
  • Fig. 1 shows schematically a radial piston pump 1 which is flanged to an electric motor.
  • the radial piston pump 1 conveys liquid from a container into the pressure line 5 via the suction chamber 3 and the suction line 4.
  • an elastically deformable molded part 6 is arranged in the suction chamber 3, which is made of a foamed material with closed air or gas bubbles.
  • the geometry of this molded part 6 depends on the special spatial conditions in the suction area of the pump. Instead of a foamed material, it is also possible to use a molded part which, instead of the many bubbles, has only one or more specially designed air or gas chambers.
  • the embodiment of the invention according to FIG. 2 provides a membrane 7 as an elastic means in the intake space 3, which has a closed, preferably air-filled chamber 8 in the intake space 3, the compressibility of which can compensate the intake pressure pulsations.
  • FIG. 3 shows an annular damping hose 9 arranged in the suction space 3, which is fixed by the annular filter element 10 also arranged in the suction space 3.
  • the filter element 10 is provided with a plurality of holding arms 11 distributed over the circumference of the filter element, which partially surround the damping hose 9 and thus clamp it between the filter element 10 and the adjoining wall in the housing 12.
  • the damping hose 9 is designed as a component which is plugged together at its two ends, or it can be composed of a plurality of segments which are each inserted into one another.
  • the damping hose 9 is preferably made of rubber, so that the pretensioning force of the expanded rubber keeps the two hose ends secured against displacement on the connecting piece 13 chamfered in the shape of a truncated cone on both sides.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pipe Accessories (AREA)
  • Compressor (AREA)
  • Reciprocating Pumps (AREA)

Abstract

Afin d'obtenir une pompe à piston compacte et silencieuse ayant au moins un piston de refoulement qui déplace un milieu sous pression d'une chambre d'aspiration (3) jusqu'à un raccord de refoulement, à travers une chambre de travail, des éléments élastiques d'amortissement (6, 7, 9), qui compensent d'éventuelles impulsions de pression, sont agencés dans la chambre d'aspiration.In order to obtain a compact and quiet piston pump having at least one delivery piston which displaces a pressurized medium from a suction chamber (3) to a discharge connection, through a working chamber, Elastic damping elements (6, 7, 9), which compensate for possible pressure pulses, are arranged in the suction chamber.

Description

KolbenpumpePiston pump
Die Erfindung betrifft eine Kolbenpumpe mit mindestens einem Förderkolben, der Druckmittel von einem Ansaugraum über eine Arbeitskammer in einen Druckanschluß fördert. Bei derartigen Pumpen enstehen unerwünschte Geräusche durch Druckpulsation. Zur Geräuschdämpfung ist aus der DE AS 28 24 239 bekannt, das Druckmittel von der Arbeits- kammer zum Druckanschluß über einen Sammelraum zu führen, der als Schwingungstilger wirkt.The invention relates to a piston pump with at least one delivery piston, which conveys pressure medium from a suction chamber via a working chamber into a pressure connection. In pumps of this type, undesirable noises occur due to pressure pulsation. For noise reduction, it is known from DE AS 28 24 239 to guide the pressure medium from the working chamber to the pressure connection via a collecting space, which acts as a vibration absorber.
Zur Dämpfung von Schwingungen in den Ansaugleitungen ist es bekannt, sog. Ansaugwindkessel zu verwenden. Diese An¬ saugwindkessel haben jedoch den Nachteil, daß sie, um ei¬ nen akzeptablen Ausgleich zwischen der Strömungsgeschwin¬ digkeit der angesaugten und der abgegebenen Flüssigkeit zu gewährleisteten, eine enorme Baugröße erfordern. Ferner werden sie bei Hochvakuumentlüftung mit anschließender Druckbefüllung unwirksam. .To dampen vibrations in the intake pipes, it is known to use so-called intake wind boilers. However, these suction wind boilers have the disadvantage that they require an enormous size in order to ensure an acceptable balance between the flow speed of the sucked-in and the discharged liquid. Furthermore, they become ineffective in high vacuum ventilation with subsequent pressure filling. .
Ziel der Erfindung ist es daher, eine Geräuschdämpfung für Kolbenpumpen zu schaffen, die sich durch besonders gerin- - gen Platzbedarf bei bestmöglichen Dämpfungseigenschaften auszeichnet, mit einfachen Mitteln kostensparend reali¬ sierbar sowie wartungsfreundlich ist und dabei für den Einsatz bei Pumpen geeignet ist, die vor der Druckbe¬ füllung Vakuumentlüftet werden. Diese Aufgabe wird erfindungsgemäß dadurch gelöst, das im Ansaugraum elastische Dämpfungselemente angeordnet sind. Auf diese Weise werden die Druckschwingungen im Ansaugbe¬ reich der Pumpe direkt am Entstehungsort kompensiert.The aim of the invention is therefore to provide noise damping for piston pumps which is characterized by particularly small space requirements with the best possible damping properties, can be realized in a cost-effective manner with simple means and is easy to maintain and is suitable for use in pumps which are the pressure filling be vented vacuum. This object is achieved according to the invention in that elastic damping elements are arranged in the intake space. In this way, the pressure fluctuations in the suction area of the pump are compensated for directly at the point of origin.
Eine bevorzugte Ausführungsform der Erfindung sieht vor, daß das elastische Dämpfungselement durch mindestens ein verformbares Formteil gebildet ist, welches mindestens eine geschlossene, gasgefüllte Kammer aufweist. Eine be¬ sonders kostengünstige Ausführungsform der Erfindung kann dadurch realisiert werden, daß das Formteil aus ge- schlossenporigem Schaumstoff oder Gummi ausgeführt ist. Auf diese Weise läßt sich das elastische Mittel besonders leicht an die vorhandene Ansaugraumgeometrie anpassen.A preferred embodiment of the invention provides that the elastic damping element is formed by at least one deformable molded part which has at least one closed, gas-filled chamber. A particularly inexpensive embodiment of the invention can be realized in that the molded part is made of closed-cell foam or rubber. In this way, the elastic means can be particularly easily adapted to the existing intake space geometry.
Eine andere Ausführungsform der Erfindung sieht vor, daß das elastische Dämpfungselement eine bewegbare Wand ist, die innerhalb des Ansaugraumes einen Gasraum begrenzt. So läßt sich beispielsweise durch den Einbau einer Membran in den Saugbereich auf einfache Weise eine effektive Ge¬ räuschdämpfung erzielen.Another embodiment of the invention provides that the elastic damping element is a movable wall which delimits a gas space within the suction space. For example, by installing a membrane in the suction area, effective noise reduction can be achieved in a simple manner.
Eine weitere empfehlenswerte Ausführungsform der Erfindung sieht vor, das Dämpfungselement als ringförmig ge¬ schlossenen Gummischlauch auszubilden'. Hierdurch läßt sich eine große Dämpfungsfläche erzielen und das Dämpfungsele¬ ment kann besonders gut im Ansaugraum eingefügt und ge¬ halten werden. Zur Führung und zum Zwecke einer definier¬ ten Verformbarkeit wirkt das Dämpfungselement mit einem Ringfilterelement zusammen, wobei am Filterelement steg- för ig ausgebildete Haltearme vorgesehen sind, die teilum- greifend in einem radialen Abstand mit nahezu gleicher Ab¬ standsteilung das Dämpfungselement aufnehmen, wobei die den Ansaugraum begrenzende Wand zur Lagesicherung des Däm¬ pfungselementes beiträgt. Hierdurch ist gleichzeitig eine einfache Montage, Demontage und somit schnelle Austausch¬ barkeit gewährleistet.A further recommended embodiment the invention provides to form the damping element is designed as an annular rubber hose closed ge '. In this way, a large damping area can be achieved and the damping element can be inserted and held particularly well in the intake space. For guiding and for the purpose of a defined deformability, the damping element interacts with a ring filter element, web-shaped holding arms being provided on the filter element, grasp the damping element at a radial distance with almost the same spacing, the wall delimiting the suction space contributing to securing the position of the damping element. This at the same time ensures simple assembly, disassembly and therefore rapid interchangeability.
Weitere vorteilhafte Merkmale, sowie die Funktion der Er¬ findung ergeben sich aus der nachstehenden Beschreibung anhand den Zeichnungen.Further advantageous features and the function of the invention result from the following description with reference to the drawings.
Hierzu zeigt:This shows:
Fig. 1 den prinzipiellen Aufbau einer ersten Ausfüh¬ rungsform der Erfindung,1 shows the basic structure of a first embodiment of the invention,
Fig. 2 den Aufbau einer zweiten Ausführungsform der Er¬ findung,2 shows the structure of a second embodiment of the invention,
Fig. 3 ein konkretes Ausführungsbeispiel gemäß Fig. 1 undFig. 3 shows a concrete embodiment of FIG. 1 and
Fig. 4 eine Gesamtansicht des als Dämpfungsschlauch aus¬ gebildeten Dämpfungselementes mit im Teilschnitt dargestellten Verbindungsstücken.4 shows an overall view of the damping element designed as a damping hose with connecting pieces shown in partial section.
Fig. 1 zeigt schematisch eine radiale Kolbenpumpe 1, die an einem Elektromotor angeflanscht ist. Die Radialkolben¬ pumpe 1 fördert über den Ansaugraum 3 und die Saugleitung 4 Flüssigkeit aus einem Behälter in die Druckleitung 5. Zum Kompensieren der Pulsation des Ansaugdruckes ist im Ansaugraum 3 ein elastisch verformbares Formteil 6 ange¬ ordnet, das aus einem geschäumten Werkstoff mit ge- schlossenen Luft- oder Gasblasen besteht. Die Geometrie dieses Formteiles 6 richtet sich nach den speziellen Raum¬ verhältnissen im Saugbereich der Pumpe. Statt einem ge¬ schäumten Werkstoff kann auch ein Formteil verwandt wer¬ den, das statt der vielen Blasen nur eine oder mehrere speziell ausgebildete Luft- bzw. Gaskammern aufweist.Fig. 1 shows schematically a radial piston pump 1 which is flanged to an electric motor. The radial piston pump 1 conveys liquid from a container into the pressure line 5 via the suction chamber 3 and the suction line 4. To compensate for the pulsation of the suction pressure, an elastically deformable molded part 6 is arranged in the suction chamber 3, which is made of a foamed material with closed air or gas bubbles. The geometry of this molded part 6 depends on the special spatial conditions in the suction area of the pump. Instead of a foamed material, it is also possible to use a molded part which, instead of the many bubbles, has only one or more specially designed air or gas chambers.
Die Ausführungsform der Erfindung gemäß Fig. 2 sieht als elastisches Mittel im Ansaugraum 3 eine Membran 7 vor, welche im Ansaugraum 3 eine geschlossene, vorzugsweise mit Luft gefüllte Kammer 8 aufweist, durch deren Kompressibi¬ lität die Ansaugdruckpulsationen kompensiert werden können.The embodiment of the invention according to FIG. 2 provides a membrane 7 as an elastic means in the intake space 3, which has a closed, preferably air-filled chamber 8 in the intake space 3, the compressibility of which can compensate the intake pressure pulsations.
Die in Fig. 3 dargestellte, erfindungsgemäße Ausführungs¬ form zeigt einen im Ansaugraum 3 angeordneten, ringförmig umlaufenden Dämpfungsschlauch 9, der durch das ebenfalls im Ansaugraum 3 angeordnete, ringförmige Filterelement 10 fixiert ist. Hierzu ist das Filterelement 10 mit mehreren, über den Umfang des Filterelementes verteilte Haltearme 11 versehen, die den Dämpfungsschlauch 9 teilweise umgeben und ihn so zwischen dem Filterelement 10 und der angren¬ zenden Wand im Gehäuse 12 einspannen. Der Dämpfungs¬ schlauch 9 ist als ein an seinen beiden Enden zusammenge¬ stecktes Bauteil ausgeführt, oder er kann aus mehreren Segmenten, die jeweils ineinandergesteckt sind, zusammen¬ gesetzt sein.The embodiment according to the invention shown in FIG. 3 shows an annular damping hose 9 arranged in the suction space 3, which is fixed by the annular filter element 10 also arranged in the suction space 3. For this purpose, the filter element 10 is provided with a plurality of holding arms 11 distributed over the circumference of the filter element, which partially surround the damping hose 9 and thus clamp it between the filter element 10 and the adjoining wall in the housing 12. The damping hose 9 is designed as a component which is plugged together at its two ends, or it can be composed of a plurality of segments which are each inserted into one another.
Fig. 4 zeigt eine Gesamtansicht des gasgefüllten Däm¬ pfungsschlauches 9, wonach im Bereich des Teilschnittes das stumpfwinklig abgekröpfte, in die beiden Enden des Schlauches eingefügte Verbindungsstück 13 druckmitteldicht die gasundurchlässige Kammer 8 im Dämpfungsschlauch 9 ver- schließt. Der Dämpfungsschlauch 9 ist vorzugsweise aus Gummi hergestellt, so daß die Vorspannkraft des aufgewei¬ teten Gummis die beiden Schlauchenden auf den beidseitig kegelstumpfförmig angefasten Verbindungsstück 13 verschie¬ begesichert hält. 4 shows an overall view of the gas-filled damping hose 9, according to which in the area of the partial section the obtuse-angled connector 13 inserted into the two ends of the hose seals the gas-impermeable chamber 8 in the damping hose 9 in a pressure-tight manner. closes. The damping hose 9 is preferably made of rubber, so that the pretensioning force of the expanded rubber keeps the two hose ends secured against displacement on the connecting piece 13 chamfered in the shape of a truncated cone on both sides.
Bezugszeichenliste :Reference symbol list:

Claims

Patentansprüche: Claims:
1. Kolbenpumpe mit mindestens einem Förderkolben, der Druckmittel von einem Ansaugraum über eine Arbeits- kammer in einen Druckanschluß fördert, dadurch g e k e n n z e i c h n e t , daß im Ansaugraum (3) mindestens ein elastomeres Dämpfungselement (6, 7, 9) angeordnet ist.1. Piston pump with at least one delivery piston, which conveys pressure medium from a suction chamber via a working chamber into a pressure connection, thereby ensuring that at least one elastomeric damping element (6, 7, 9) is arranged in the suction chamber (3).
2. Kolbenpumpe nach Anspruch 1, dadurch g e e n n ¬ z e i c h n e t , daß das elastomere Dämpfungsele¬ ment durch mindestens ein verformbares Formteil (6, 9) gebildet ist, welches mindestens eine ge¬ schlossene, gasgefüllte Kammer aufweist.2. Piston pump according to claim 1, characterized in that the elastomeric damping element is formed by at least one deformable molded part (6, 9) which has at least one closed, gas-filled chamber.
3. Kolbenpumpe nach Anspruch 2, dadurch g e k e n n ¬ z e i c h n e t , daß das Formteil (6) aus ge¬ schlossenporigem Schaumstoff besteht.3. Piston pump according to claim 2, characterized in that the molded part (6) consists of closed-cell foam.
4. Kolbenpumpe nach Anspruch 1, dadurch g e e n n ¬ z e i c h n e t , daß das elastische Dämpfungsele¬ ment eine bewegbare Wand (7) ist, welche einen Gas¬ raum (8) begrenz .4. Piston pump according to claim 1, characterized in that the elastic damping element is a movable wall (7) which delimits a gas space (8).
5. Kolbenpumpe nach Anspruch 1, dadurch g e k e n n ¬ z e i c h n e t , daß das elastomere Dämpfungseie¬ met- aus einem Dämpf ngsschlauch (9) mit vorzugsweise ringfömiger, geschlossener Gestalt besteht.5. Piston pump according to claim 1, characterized in that the elastomeric damping element consists of a damping hose (9) with a preferably annular, closed shape.
6. Kolbenpumpe nach Anspruch 5, dadurch g e k e n n ¬ z e i c h n e t , daß der Dämpfungsschlauch (9) ei¬ nen ringförmigen Profilquerschnitt besitzt. 6. Piston pump according to claim 5, characterized in that the damping hose (9) has a ring-shaped profile cross-section.
7. Kolbenpumpe nach Anspruch 5, dadurch g e e n ¬ z e i c h n e t , daß in dem Dämpfungsschlauch (9) eine mit Gas gefüllte Kammer (8) vorgesehen ist.7. Piston pump according to claim 5, characterized in that a gas-filled chamber (8) is provided in the damping hose (9).
8. Kolbenpumpe nach Anspruch 7, dadurch g k e n n ¬ z e i c h n e t , daß die Kammer (8) von einem in die beiden Enden des Dämpfungsschlauches (9) einfüg¬ bares Verbindungsstück (13) druckmitteldicht ver¬ schließbar ist.8. Piston pump according to claim 7, characterized in that the chamber (8) can be closed in a pressure-tight manner by a connector (13) insertable into the two ends of the damping hose (9).
9. Kolbenpumpe nach Anspruch 8, dadurch g e k e n ¬ z e i c h n e t , daß das Verbindungsstück (13) des DämpfungsSchlauches (9) einen kreisrunden Quer¬ schnitt aufweist und vorzugsweise stumpfwinklig ab¬ gekröpft ist.9. Piston pump according to claim 8, characterized in that the connecting piece (13) of the damping hose (9) has a circular cross-section and is preferably offset at an obtuse angle.
10. Kolbenpumpe nach Anspruch 8, dadurch g e k e n ¬ z e i c h n e t , daß der Außendurchmesser des Ver¬ bindungsstückes (13) spiegelsymmetrisch über eine identische, zu beiden Seiten seiner Abkröpfung in den Dämpfungsschlauch (9) einzufügenden Länge größer ist, als der Innendurchmesser des Dämpfungs¬ schlauches (9) .10. Piston pump according to claim 8, characterized geken ¬ characterized in that the outer diameter of the Ver¬ connecting piece (13) is mirror-symmetrical over an identical, on both sides of its offset in the damping hose (9) to be inserted larger than the inner diameter of the damping hose (9).
11. Kolbenpumpe nach Anspruch 8, dadurch g e k e n ¬ z e i c h n e t , daß der Außendurchmesser des Ver¬ bindungsstückes (13) näherungsweise dem Außendurch¬ messer des Dämpfungsschlauches (9) entspricht.11. Piston pump according to claim 8, characterized in that the outer diameter of the connecting piece (13) approximately corresponds to the outer diameter of the damping hose (9).
12. Kolbenpumpe nach Anspruch 5, dadurch g e k e n n ¬ z e i c h n e t , daß der Außendurchmesser des DämpfungsSchlauches (9) mit mehreren über den Umfang eines Filterelementes (10) verteilte und im wesent¬ lichen axial erstreckende Haltearme (11) zusammen¬ wirkt.12. Piston pump according to claim 5, characterized in that the outer diameter of the Damping hose (9) interacts with a plurality of holding arms (11) distributed over the circumference of a filter element (10) and essentially axially extending.
13. Kolbenpumpe nach Anspruch 12, dadurch g e k e n n ¬ z e i c h n e t , daß die Haltearme (11) des Fil¬ terelementes (10) den Dämpfungsschlauch (9) teil¬ weise radial umgreifen.13. Piston pump according to claim 12, characterized in that the holding arms (11) of the filter element (10) partially encompass the damping hose (9) radially.
14. Kolbenpumpe nach Anspruch 12, dadurch g e k e n n ¬ z e i c h n e t , daß das Filterelement (10) mit dem Dämpfungsschlauch (9) im Ansaugraum (3) der Pum¬ pe zusammenwirkt.14. Piston pump according to claim 12, characterized in that the filter element (10) interacts with the damping hose (9) in the suction chamber (3) of the pump.
15. Kolbenpumpe nach Anspruch 12, dadurch g e k e ¬ z e i c h n e t , daß das Filterelement (10) an die Form des DämpfungsSchlauches angepaßt und radial durchströmbar ist.15. Piston pump according to claim 12, characterized in that the filter element (10) is adapted to the shape of the damping hose and can be flowed through radially.
16. Kolbenpumpe nach Anspruch 5, dadurch g e k e n n ¬ z e i c h n e t , daß der Dämpfungsschlauch (9) an seiner Mantelfläche durch eine, den Ansaugraum (3) begrenzende Wand partiell abstützend kontaktiert ist. 16. Piston pump according to claim 5, characterized in that the damping hose (9) is partially supported on its outer surface by a wall that delimits the suction chamber (3).
EP89907131A 1988-07-07 1989-06-16 Piston pump Expired - Lifetime EP0378629B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3822988 1988-07-07
DE3822988 1988-07-07
DE3914954 1989-05-06
DE3914954A DE3914954A1 (en) 1988-07-07 1989-05-06 PISTON PUMP

Publications (2)

Publication Number Publication Date
EP0378629A1 true EP0378629A1 (en) 1990-07-25
EP0378629B1 EP0378629B1 (en) 1993-04-28

Family

ID=25869828

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89907131A Expired - Lifetime EP0378629B1 (en) 1988-07-07 1989-06-16 Piston pump

Country Status (5)

Country Link
US (2) US5030070A (en)
EP (1) EP0378629B1 (en)
JP (1) JPH03500326A (en)
DE (2) DE3914954A1 (en)
WO (1) WO1990000682A1 (en)

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Also Published As

Publication number Publication date
EP0378629B1 (en) 1993-04-28
US5141415A (en) 1992-08-25
WO1990000682A1 (en) 1990-01-25
JPH03500326A (en) 1991-01-24
DE58904213D1 (en) 1993-06-03
US5030070A (en) 1991-07-09
DE3914954A1 (en) 1990-01-11

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