EP0793017B1 - Pump for a high pressure cleaning apparatus - Google Patents

Pump for a high pressure cleaning apparatus Download PDF

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Publication number
EP0793017B1
EP0793017B1 EP97101289A EP97101289A EP0793017B1 EP 0793017 B1 EP0793017 B1 EP 0793017B1 EP 97101289 A EP97101289 A EP 97101289A EP 97101289 A EP97101289 A EP 97101289A EP 0793017 B1 EP0793017 B1 EP 0793017B1
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EP
European Patent Office
Prior art keywords
chamber
cylinder
pump according
bores
cylinder block
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
EP97101289A
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German (de)
French (fr)
Other versions
EP0793017A2 (en
EP0793017A3 (en
Inventor
Roger Skoumal
Jürgen KLÖPFER
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.)
Alfred Kaercher SE and Co KG
Original Assignee
Alfred Kaercher SE and Co KG
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Publication date
Application filed by Alfred Kaercher SE and Co KG filed Critical Alfred Kaercher SE and Co KG
Publication of EP0793017A2 publication Critical patent/EP0793017A2/en
Publication of EP0793017A3 publication Critical patent/EP0793017A3/en
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Publication of EP0793017B1 publication Critical patent/EP0793017B1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02Cleaning by the force of jets or sprays
    • B08B3/026Cleaning by making use of hand-held spray guns; Fluid preparations therefor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/14Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B1/141Details or component parts
    • F04B1/143Cylinders
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/24Bypassing

Definitions

  • the invention relates to a pump for a high-pressure cleaning device with a cylinder block in which several parallel cylinder bores are arranged with a connected to the cylinder block, the cylinder head with aligned with the cylinder bores of the cylinder block Has holes that are common to each an axially displaceable along the bores by a drive Form pump piston receiving guides, with pump chambers connected to the bores in the cylinder head, which with intake valves a suction line and via outlet valves with a Pressure line connected, and with one of the pressure line leading to the suction line, through a Locking valve lockable bypass line.
  • Such a pump is for example from DE 39 28 006 A1 known. You can reach with one Pump a very space-saving design because the essential Parts in the cylinder block and in the cylinder head are cheap to accommodate.
  • bypass line and this Bypass line closing closing valve which at Pressure washers also referred to as overflow devices becomes.
  • the closing valve is arranged in a chamber in the cylinder block which is from the outer edge of the cylinder block perpendicular to the longitudinal axis of the cylinder bores in the Clearance between the cylinder bores in the cylinder block extends.
  • the chamber as Hole is formed, preferably narrows Hole stepped towards its inner end.
  • the chamber can enter the suction line occur so that no additional on this side Connection lines become necessary.
  • suction line perpendicular to the longitudinal axis of the cylinder bores and transversely to the longitudinal axis of the chamber from the outer edge of the cylinder block between the cylinder bores in the cylinder block entry.
  • a valve opening closing valve body moves. Is cheap it when the valve opening through an annular Bet is formed against a lower tier of Chamber is present.
  • valve body via a piston rod with the control piston connected, the valve opening under training an annular gap passes through and the valve body its end protruding from the valve opening.
  • control piston through a spring is moved radially outwards so that the valve body closes the valve opening this is pending.
  • a channel enters with a channel in the cylinder head is connected, which in turn at a throttle point the pressure line or downstream thereof the pressure line opens.
  • the channels in the cylinder block or in the cylinder head integrated and therefore do not require an additional one Room.
  • the channel in the cylinder block essentially arranged tangential to its outer edge is. This arrangement makes it possible to pass through the channel create a hole that is oblique to the longitudinal axis the chamber from the chamber into the cylinder block is introduced. This will make it facilitated.
  • cylinder bores provided in the cylinder block on the Corner points of an equilateral triangle arranged are.
  • the longitudinal axis of the chamber passes through the Connection line from two vertices of the triangle perpendicular.
  • the chamber extends up to extends into the center of the cylinder block.
  • control piston seals one Extension for actuation emerging from the chamber has a switching device. This allows the movement of the control piston to be used for additional To perform switching operations, for example thereby the drive of the Pump be switched off.
  • the high-pressure cleaning device shown in the drawing comprises an electric motor 1 lying in one Housing 2 is arranged and its motor shaft 3 on protrudes from both ends. Bears on one side the motor shaft 3 is a fan wheel 4 with which the motor flows around Cooling air is conveyed on the opposite Side a swash plate 5, which is the drive element for a high pressure pump attached to the motor housing 6 forms.
  • This high pressure pump is composed of two components, namely a cylinder block 7 and a flat on this adjacent cylinder head 8. Both components can be designed, for example, as aluminum die-cast parts his.
  • the cylinder block 7 has three cylinder bores 9, which pass through the cylinder block 7 and their parallel Longitudinal axes run parallel to the motor shaft 3.
  • This Cylinder bores 9 are at the corner points arranged equilateral triangle, the center of which lies approximately in the middle of the cylinder block 7.
  • Three bores 10 are also arranged in the cylinder head 8, the one with the cylinder bores 9 in the cylinder block 7 aligned when the cylinder block 7 and the cylinder head 8 joined together flat are.
  • the aligned cylinder bores 9 and holes 10 form a guide for each have a cylindrical pump piston 11, which in the two holes in the longitudinal direction and opposite the holes sealed by seals 12, 13 is led.
  • the pump pistons 11 are through Coil springs 14, which are on the one hand on the cylinder block 7 and on the other hand on a pressure cuff 15 support the pump piston 11 with its out of the cylinder bore 9 protruding free end against the swash plate 5 pressed so that the pump piston 11 at Rotation of the motor shaft 3 an oscillating longitudinal displacement experienced in holes 9 and 10.
  • the bores 10 in the cylinder head 8 are as blind bores executed, they open into the cylinder head 8 arranged pump chambers 16, which have an inlet valve 17 with a suction line 18 and an outlet valve 19 are connected to a pressure chamber 20. With the oscillating Movement of the pump piston 11 is over the Inlet valve 17 sucked liquid from the suction line 18 and then via the outlet valve 19 under emitted high pressure in the pressure chamber 20.
  • the pressure room stands with one shown in the drawing Pressure line in connection through which the funded Liquid is supplied to a hose line 21, which in turn is connected to a hand-held spray gun 22 is ( Figure 1).
  • a suction line opens radially into the cylinder block 7 23 a, located inside one of the cylinder block 7 molded, radially projecting pipe socket 24 is located and which are between the cylinder bores 9 extends into the interior of the cylinder block 7, the suction line 23 approximately through the center of the spanned by the three cylinder bores 9 Triangle runs through and below that of the pipe socket 24 opposite cylinder bore 9 ends ( Figure 4).
  • Three parallel to the cylinder bores 9 Running bores 25 are with the suction line 23 in connection, these bores 25 are sleeve-shaped Connectors 26 with the inlet valves 17 in the cylinder head and form together with these connecting pieces 26, the suction lines 18th out.
  • the connecting pieces 26 are sealing in Extensions 27, 28 in the cylinder block 7 or in the cylinder head 8 used and thereby bridge the connection surface between cylinder block 7 and cylinder head 8th.
  • Control spool 33 includes, at its lower End carries a piston rod 34. Enforced this a central opening 35 of an annular insert 36, which narrows at a lower step 37 Bore 29 supports and that via an O-ring seal 38 is sealed off from the bore 29.
  • the outside diameter of the piston rod is less than the diameter of the central opening 35 so that forms an annular gap between the two parts.
  • a flared Valve body 39 which by a 32 in the lower part arranged, surrounding the piston rod 34, on Insert 36 and helical spring supporting the control piston 33 40 in a closing the central opening 35 Plant on the insert 36 is moved.
  • a closure body is sealed in the upper part space 31 41 used by an end plate 42 is held in the bore 29.
  • This extension 43 is used Actuation of a switch 44, which is above the cylinder block 7 arranged in the high-pressure cleaning device is. This switch 44 switches when actuated accordingly the electric motor 1 on or off.
  • the stepped bore 29 opens into the suction line 23 on.
  • the lower subspace 32 emerges parallel to the longitudinal axis the cylinder bores 9 from a channel 45, the via a connector 46 and a channel 47 in the Cylinder head 8 with the pressure chamber 20 in connection stands.
  • the connector 46 is similar to the connector 26 sealed in extensions 48 or 49 of the cylinder head 8 and the cylinder block 7 used and bridges the dividing plane in this area between cylinder block 7 and cylinder head 8.
  • This hole is like that arranged that they from the top of the tiered Hole 29 can be introduced from for this purpose is in the side wall opposite line 50 a corresponding recess 51 is provided in the bore 29, which enables straight-line access to line 50.
  • the line 50 opens into a parallel to the cylinder bores 9 extending channel 52, the same Way as the channel 45 via one in the drawing not shown connector with one in the Drawing also not shown channel in the cylinder head 8 communicates.
  • This channel leads to a outgoing from the pressure chamber 20 pressure line and opens into this in the area of a narrowing of the pressure line or downstream of such a constriction.
  • the pump pistons 11 through the swash plate 5 driven oscillating and thereby pump Liquid in the manner described from the suction lines 18 in the pressure chamber 20.
  • the liquid is the suction line 18 through the pipe socket 24, the Suction line 23, the holes 25 and the connectors 26 forwarded.
  • the pump pressure gets below Liquid from the pressure chamber 20 via the channel 47, the connector 46 and the channel 45 in the lower Subspace 32 of the bore 29, also stands upper subspace 31 via line 50 and channel 52 in the manner described in connection with the pressure line. Due to the flowing liquid in the pressure line arises in the area of narrowing in the Pressure line a pressure drop due to the throttling effect the constriction is also downstream of the constriction a pressure drop compared to the pressure chamber 20 available. As a result, the upper subspace 31 with a Pressure applied that is lower than the pressure in the lower subspace 32. This leads together with the force the coil spring 40 so that the control piston 33rd is pushed up, the valve body 39 closes the central opening 35. The closing valve in the bore 29 remains closed by the Pump-conveyed liquid passes from the pressure chamber 20 via the subsequent pressure line to the hand spray gun 22.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Gas Separation By Absorption (AREA)

Abstract

The pump includes a by-pass pipe closable by a valve (30) mounted in the cylinder block (7) in a chamber (29) which extends from the outer edge of the block at right angles to the longitudinal axis of the bores (9) into the space between the bores in the block. The chamber can be formed by a bore narrowing by steps towards its inner end. At its inner end the chamber can enter the suction pipe (23) which runs at right angles to the longitudinal axis of the cylinder bores (9) and across the longitudinal axis of the chamber (29) from the outer edge of the block between the cylinder bores in the block. A control piston is axially displaceable in the chamber to divide it into a top and bottom area.

Description

Die Erfindung betrifft eine Pumpe für ein Hochdruckreinigungsgerät mit einem Zylinderblock, in dem mehrere parallele Zylinderbohrungen angeordnet sind, mit einem mit dem Zylinderblock verbundenen Zylinderkopf, der mit den Zylinderbohrungen des Zylinderblockes ausgerichtete Bohrungen aufweist, die gemeinsam mit diesen jeweils eine längs der Bohrungen durch einen Antrieb axial verschiebliche Pumpenkolben aufnehmende Führungen ausbilden, mit mit den Bohrungen in Verbindung stehenden Pumpenkammern im Zylinderkopf, die über Einlaßventile mit einer Saugleitung und über Auslaßventile mit einer Druckleitung in Verbindung stehen, und mit einer von der Druckleitung zur Saugleitung führenden, durch ein Schließventil verschließbaren Bypassleitung.The invention relates to a pump for a high-pressure cleaning device with a cylinder block in which several parallel cylinder bores are arranged with a connected to the cylinder block, the cylinder head with aligned with the cylinder bores of the cylinder block Has holes that are common to each an axially displaceable along the bores by a drive Form pump piston receiving guides, with pump chambers connected to the bores in the cylinder head, which with intake valves a suction line and via outlet valves with a Pressure line connected, and with one of the pressure line leading to the suction line, through a Locking valve lockable bypass line.

Eine solche Pumpe ist beispielsweise aus der DE 39 28 006 A1 bekannt. Man erreicht mit einer solchen Pumpe einen sehr platzsparenden Aufbau, da die wesentlichen Teile in dem Zylinderblock und in dem Zylinderkopf günstig unterzubringen sind.Such a pump is for example from DE 39 28 006 A1 known. You can reach with one Pump a very space-saving design because the essential Parts in the cylinder block and in the cylinder head are cheap to accommodate.

Zusätzlichen Platz benötigen aber regelmäßig bei derartigen Konstruktionen die Bypassleitung und das diese Bypassleitung verschließende Schließventil, das bei Hochdruckreinigern auch als Überströmer bezeichnet wird. However, additional space is regularly required for such Constructions the bypass line and this Bypass line closing closing valve, which at Pressure washers also referred to as overflow devices becomes.

Es ist Aufgabe der Erfindung, eine gattungsgemäße Pumpe so auszugestalten, daß eine platzsparende Anordnung für die Bypassleitung und den Überströmer ermöglicht wird.It is an object of the invention to provide a generic pump To design so that a space-saving arrangement for the bypass line and the overflow valve is made possible.

Diese Aufgabe wird bei einer Pumpe der eingangs beschriebenen Art erfindungsgemäß dadurch gelöst, daß das Schließventil im Zylinderblock in einer Kammer angeordnet ist, die sich vom äußeren Rand des Zylinderblockes senkrecht zur Längsachse der Zylinderbohrungen in den Zwischenraum zwischen den Zylinderbohrungen im Zylinderblock erstreckt.This task is described for a pump as described in the introduction Art solved according to the invention in that the The closing valve is arranged in a chamber in the cylinder block which is from the outer edge of the cylinder block perpendicular to the longitudinal axis of the cylinder bores in the Clearance between the cylinder bores in the cylinder block extends.

Man nützt bei dieser Konstruktion also den Raum zwischen den die Pumpenkolben aufnehmenden Zylinderbohrungen im Zylinderblock aus, um in diesem Raum die Kammer für das Schließventil unterzubringen. Es hat sich überraschenderweise herausgestellt, daß in diesem Bereich noch genügend Raum für die Aufnahme einer solchen Kammer vorhanden ist, so daß die Kammer vollständig in den Umriß eines Zylinderblockes bekannter Bauart eintaucht, ohne nach außen hin zusätzlichen Raum einzunehmen. Diese Anordnung hat außerdem den Vorteil, daß die Verbindungsleitungen zwischen der Druckleitung einerseits und der Saugleitung andererseits besonders kurz ausgebildet werden können, so daß auch der Platzbedarf für diese Leitungen äußerst gering ist.With this construction, the space between is used the cylinder bores that receive the pump pistons in the cylinder block to the chamber in this room to accommodate the closing valve. It has surprisingly turned out to be pointed out that in this area there is still enough space to accommodate such a chamber is present so that the chamber completely in the Immerses the outline of a cylinder block of a known type, without taking up additional space on the outside. This Arrangement also has the advantage that the connecting lines between the pressure line on the one hand and the suction line, on the other hand, is particularly short can be, so that the space required for this Lines is extremely low.

Man erhält dadurch einen besonders kompakten Aufbau einer solchen Pumpe. This gives a particularly compact structure such a pump.

Insbesondere kann vorgesehen sein, daß die Kammer als Bohrung ausgebildet ist, vorzugsweise verengt sich die Bohrung in Richtung auf ihr inneres Ende stufig.In particular, it can be provided that the chamber as Hole is formed, preferably narrows Hole stepped towards its inner end.

An diesem inneren Ende kann die Kammer in die Saugleitung eintreten, so daß an dieser Seite keine zusätzlichen Verbindungsleitungen notwendig werden.At this inner end, the chamber can enter the suction line occur so that no additional on this side Connection lines become necessary.

Insbesondere ist es vorteilhaft, wenn die Saugleitung senkrecht zur Längsachse der Zylinderbohrungen und quer zur Längsachse der Kammer vom äußeren Rand des Zylinderblockes zwischen die Zylinderbohrungen im Zylinderblock eintritt. Bei einer solchen Konstruktion werden alle Zwischenräume zwischen den Zylinderbohrungen optimal ausgenutzt, in einer Richtung durch die von außen nach innen eintretende Saugleitung, in einer Richtung senkrecht dazu durch die von außen nach innen eintretende Kammer für das Schließventil.In particular, it is advantageous if the suction line perpendicular to the longitudinal axis of the cylinder bores and transversely to the longitudinal axis of the chamber from the outer edge of the cylinder block between the cylinder bores in the cylinder block entry. With such a construction all gaps between the cylinder bores optimal exploited in one direction by the outside suction line entering inwards, in one direction perpendicular to it from the outside to the inside Chamber for the closing valve.

Bei einer bevorzugten Ausführungsform ist vorgesehen, daß in der Kammer ein diese in einen oberen und einen unteren Teilraum unterteilender Steuerkolben axial verschieblich gelagert ist, der einen eine Ventilöffnung verschließenden Ventilkörper verschiebt. Günstig ist es, wenn die Ventilöffnung durch einen ringförmigen Einsatz gebildet wird, der gegen eine untere Stufe der Kammer anliegt.In a preferred embodiment, that in the chamber this one into an upper and one lower piston dividing control piston axially displaceable is stored, a valve opening closing valve body moves. Is cheap it when the valve opening through an annular Bet is formed against a lower tier of Chamber is present.

Bei einer besonderen Ausführungsform wird dabei der Ventilkörper über eine Kolbenstange mit dem Steuerkolben verbunden, die die Ventilöffnung unter Ausbildung eines Ringspaltes durchsetzt und den Ventilkörper an ihrem aus der Ventilöffnung vorstehenden Ende trägt.In a special embodiment, the Valve body via a piston rod with the control piston connected, the valve opening under training an annular gap passes through and the valve body its end protruding from the valve opening.

Dabei kann vorgesehen sein, daß der Steuerkolben durch eine Feder radial nach außen verschoben wird, so daß der Ventilkörper die Ventilöffnung verschließend an dieser anliegt.It can be provided that the control piston through a spring is moved radially outwards so that the valve body closes the valve opening this is pending.

Um die Steuerung des Steuerkolbens zu ermöglichen, kann weiterhin vorgesehen sein, daß parallel zur Längsachse der Zylinderbohrungen ein Kanal in den unteren Teilraum eintritt, der mit einem mit der Druckleitung in Verbindung stehenden Kanal im Zylinderkopf verbunden ist. Auch dadurch wird nur ein sehr kurzer Kanal im Zylinderblock benötigt, auch im Zylinderkopf kann durch eine sehr kurze Verbindung eine Kommunikation zwischen Druckleitung und dem unteren Teilraum der Kammer hergestellt werden.To enable the control of the control piston, continue to be provided that parallel to the longitudinal axis the cylinder bores a channel in the lower part occurs, which in connection with the pressure line standing channel in the cylinder head is connected. This also means that there is only a very short channel in the cylinder block needed, even in the cylinder head can be replaced by a very short connection a communication between Pressure line and the lower part of the chamber become.

Weiterhin kann vorgesehen sein, daß in den oberen Teilraum ein Kanal eintritt, der mit einem Kanal im Zylinderkopf verbunden ist, der seinerseits an einer Drosselstelle der Druckleitung oder stromabwärts davon in die Druckleitung einmündet. Auch in diesem Falle werden die Kanäle in den Zylinderblock bzw. in den Zylinderkopf integriert und benötigen daher keinen zusätzlichen Raum. Furthermore, it can be provided that in the upper part of the room a channel enters with a channel in the cylinder head is connected, which in turn at a throttle point the pressure line or downstream thereof the pressure line opens. In this case too the channels in the cylinder block or in the cylinder head integrated and therefore do not require an additional one Room.

Bei einer bevorzugten Ausführungsform kann vorgesehen sein, daß der Kanal im Zylinderblock im wesentlichen tangential zu dessen äußerem Rand verlaufend angeordnet ist. Diese Anordnung macht es möglich, den Kanal durch eine Bohrung herzustellen, die schräg zur Längsachse der Kammer von der Kammer ausgehend in den Zylinderblock eingebracht wird. Dadurch wird die Herstellung erleichtert.In a preferred embodiment can be provided be that the channel in the cylinder block essentially arranged tangential to its outer edge is. This arrangement makes it possible to pass through the channel create a hole that is oblique to the longitudinal axis the chamber from the chamber into the cylinder block is introduced. This will make it facilitated.

Bei einer bevorzugten Ausführungsform sind drei Zylinderbohrungen im Zylinderblock vorgesehen, die auf den Eckpunkten eines gleichseitigen Dreiecks angeordnet sind. Die Längsachse der Kammer durchsetzt dabei die Verbindungslinie von zwei Eckpunkten des Dreiecks senkrecht.In a preferred embodiment there are three cylinder bores provided in the cylinder block on the Corner points of an equilateral triangle arranged are. The longitudinal axis of the chamber passes through the Connection line from two vertices of the triangle perpendicular.

Besonders vorteilhaft ist es, wenn sich die Kammer bis in die Mitte des Zylinderblockes erstreckt.It is particularly advantageous if the chamber extends up to extends into the center of the cylinder block.

Bei einer weiteren bevorzugten Ausführungsform kann vorgesehen sein, daß der Steuerkolben eine abgedichtet aus der Kammer austretende Verlängerung zur Betätigung einer Schalteinrichtung aufweist. Dadurch kann die Bewegung des Steuerkolbens ausgenutzt werden, um zusätzliche Schaltvorgänge vorzunehmen, beispielsweise kann dadurch bei verschlossener Sprühlanze der Antrieb der Pumpe abgeschaltet werden. In a further preferred embodiment, can be provided that the control piston seals one Extension for actuation emerging from the chamber has a switching device. This allows the movement of the control piston to be used for additional To perform switching operations, for example thereby the drive of the Pump be switched off.

Die nachfolgende Beschreibung bevorzugter Ausführungsformen der Erfindung dient im Zusammenhang mit der Zeichnung der näheren Erläuterung. Es zeigen:

Figur 1:
eine schematische Schnittansicht durch ein Hochdruckreinigungsgerät mit einem Taumelscheibenantrieb;
Figur 2:
eine vergrößerte Schnittansicht im Bereich der Pumpe des Hochdruckreinigungsgerätes der Figur 1 mit dem Schließventil in der Bypassleitung in Schließstellung;
Figur 3:
eine Ansicht ähnlich Figur 2 mit dem Schließventil in Öffnungsstellung, wobei der Zylinderkopf nur schematisch wiedergegeben ist, und
Figur 4:
eine Schnittansicht längs Linie 4-4 in Figur 2.
The following description of preferred embodiments of the invention serves in conjunction with the drawing for a more detailed explanation. Show it:
Figure 1:
a schematic sectional view through a high-pressure cleaning device with a swash plate drive;
Figure 2:
an enlarged sectional view in the area of the pump of the high-pressure cleaning device of Figure 1 with the closing valve in the bypass line in the closed position;
Figure 3:
a view similar to Figure 2 with the closing valve in the open position, the cylinder head is only shown schematically, and
Figure 4:
3 shows a sectional view along line 4-4 in FIG. 2.

Das in der Zeichnung dargestellte Hochdruckreinigungsgerät umfaßt einen Elektromotor 1, der liegend in einem Gehäuse 2 angeordnet ist und dessen Motorwelle 3 an beiden Stirnseiten hervorsteht. An einer Seite trägt die Motorwelle 3 ein Lüfterrad 4, mit dem den Motor umströmende Kühlluft gefördert wird, auf der gegenüberliegenden Seite eine Taumelscheibe 5, die das Antriebselement für eine an das Motorgehäuse angesetzte Hochdruckpumpe 6 bildet.The high-pressure cleaning device shown in the drawing comprises an electric motor 1 lying in one Housing 2 is arranged and its motor shaft 3 on protrudes from both ends. Bears on one side the motor shaft 3 is a fan wheel 4 with which the motor flows around Cooling air is conveyed on the opposite Side a swash plate 5, which is the drive element for a high pressure pump attached to the motor housing 6 forms.

Diese Hochdruckpumpe wird zusammengesetzt aus zwei Bauteilen, nämlich einem Zylinderblock 7 und einem flächig an diesem anliegenden Zylinderkopf 8. Beide Bauteile können beispielsweise als Aluminiumdruckgußteile ausgebildet sein.This high pressure pump is composed of two components, namely a cylinder block 7 and a flat on this adjacent cylinder head 8. Both components can be designed, for example, as aluminum die-cast parts his.

Der Zylinderblock 7 weist drei Zylinderbohrungen 9 auf, die den Zylinderblock 7 durchsetzen und deren parallele Längsachsen parallel zur Motorwelle 3 verlaufen. Diese Zylinderbohrungen 9 sind an den Eckpunkten eines gleichseitigen Dreiecks angeordnet, dessen Mittelpunkt etwa in der Mitte des Zylinderblockes 7 liegt.The cylinder block 7 has three cylinder bores 9, which pass through the cylinder block 7 and their parallel Longitudinal axes run parallel to the motor shaft 3. This Cylinder bores 9 are at the corner points arranged equilateral triangle, the center of which lies approximately in the middle of the cylinder block 7.

Im Zylinderkopf 8 sind ebenfalls drei Bohrungen 10 angeordnet, die mit den Zylinderbohrungen 9 im Zylinderblock 7 fluchten, wenn der Zylinderblock 7 und der Zylinderkopf 8 flächig aneinanderliegend miteinander verbunden sind. Die miteinander ausgerichteten Zylinderbohrungen 9 und Bohrungen 10 bilden eine Führung für jeweils einen zylindrischen Pumpenkolben 11, der in den beiden Bohrungen in Längsrichtung verschiebbar und gegenüber den Bohrungen durch Dichtungen 12, 13 abgedichtet geführt ist. Die Pumpenkolben 11 werden durch Schraubenfedern 14, die sich einerseits am Zylinderblock 7 und andererseits an einer Druckmanschette 15 der Pumpenkolben 11 abstützen, mit ihrem aus der Zylinderbohrung 9 hervorstehenden freien Ende gegen die Taumelscheibe 5 gedrückt, so daß die Pumpenkolben 11 bei Drehung der Motorwelle 3 eine oszillierende Längsverschiebung in den Bohrungen 9 und 10 erfahren.Three bores 10 are also arranged in the cylinder head 8, the one with the cylinder bores 9 in the cylinder block 7 aligned when the cylinder block 7 and the cylinder head 8 joined together flat are. The aligned cylinder bores 9 and holes 10 form a guide for each have a cylindrical pump piston 11, which in the two holes in the longitudinal direction and opposite the holes sealed by seals 12, 13 is led. The pump pistons 11 are through Coil springs 14, which are on the one hand on the cylinder block 7 and on the other hand on a pressure cuff 15 support the pump piston 11 with its out of the cylinder bore 9 protruding free end against the swash plate 5 pressed so that the pump piston 11 at Rotation of the motor shaft 3 an oscillating longitudinal displacement experienced in holes 9 and 10.

Die Bohrungen 10 im Zylinderkopf 8 sind als Sacklochbohrungen ausgeführt, sie münden in im Zylinderkopf 8 angeordnete Pumpenkammern 16, die über ein Einlaßventil 17 mit einer Saugleitung 18 und über ein Auslaßventil 19 mit einem Druckraum 20 verbunden sind. Bei der oszillierenden Bewegung der Pumpenkolben 11 wird über das Einlaßventil 17 Flüssigkeit aus der Saugleitung 18 angesaugt und anschließend über das Auslaßventil 19 unter hohem Druck in den Druckraum 20 abgegeben. Der Druckraum steht mit einer in der Zeichnung dargestellten Druckleitung in Verbindung, durch die die geförderte Flüssigkeit einer Schlauchleitung 21 zugeführt wird, die ihrerseits mit einer Handspritzpistole 22 verbunden ist (Figur 1).The bores 10 in the cylinder head 8 are as blind bores executed, they open into the cylinder head 8 arranged pump chambers 16, which have an inlet valve 17 with a suction line 18 and an outlet valve 19 are connected to a pressure chamber 20. With the oscillating Movement of the pump piston 11 is over the Inlet valve 17 sucked liquid from the suction line 18 and then via the outlet valve 19 under emitted high pressure in the pressure chamber 20. The pressure room stands with one shown in the drawing Pressure line in connection through which the funded Liquid is supplied to a hose line 21, which in turn is connected to a hand-held spray gun 22 is (Figure 1).

In den Zylinderblock 7 mündet radial eine Ansaugleitung 23 ein, die sich im Inneren eines an den Zylinderblock 7 angeformten, radial abstehenden Rohrstutzens 24 befindet und die sich zwischen den Zylinderbohrungen 9 hindurch in das Innere des Zylinderblockes 7 erstreckt, wobei die Ansaugleitung 23 etwa durch den Mittelpunkt des durch die drei Zylinderbohrungen 9 aufgespannten Dreiecks hindurchläuft und unterhalb der dem Rohrstutzen 24 gegenüberliegenden Zylinderbohrung 9 endet (Figur 4). Drei parallel zu den Zylinderbohrungen 9 verlaufende Bohrungen 25 stehen mit der Ansaugleitung 23 in Verbindung, diese Bohrungen 25 stehen über hülsenförmige Verbindungsstücke 26 mit den Einlaßventilen 17 im Zylinderkopf in Verbindung und bilden gemeinsam mit diesen Verbindungsstücken 26 die Saugleitungen 18 aus. Die Verbindungsstücke 26 sind dabei dichtend in Erweiterungen 27, 28 im Zylinderblock 7 bzw. im Zylinderkopf 8 eingesetzt und überbrücken dadurch die Verbindungsfläche zwischen Zylinderblock 7 und Zylinderkopf 8.A suction line opens radially into the cylinder block 7 23 a, located inside one of the cylinder block 7 molded, radially projecting pipe socket 24 is located and which are between the cylinder bores 9 extends into the interior of the cylinder block 7, the suction line 23 approximately through the center of the spanned by the three cylinder bores 9 Triangle runs through and below that of the pipe socket 24 opposite cylinder bore 9 ends (Figure 4). Three parallel to the cylinder bores 9 Running bores 25 are with the suction line 23 in connection, these bores 25 are sleeve-shaped Connectors 26 with the inlet valves 17 in the cylinder head and form together with these connecting pieces 26, the suction lines 18th out. The connecting pieces 26 are sealing in Extensions 27, 28 in the cylinder block 7 or in the cylinder head 8 used and thereby bridge the connection surface between cylinder block 7 and cylinder head 8th.

Senkrecht zur Längsrichtung der Ansaugleitung 23 ist in radialer Richtung verlaufend eine sich zur Mitte hin stufig verengende Bohrung 29 in den Zylinderblock 7 eingearbeitet, die in den Zwischenraum 30 zwischen zwei benachbarten Zylinderbohrungen 9 eintritt und die in die Ansaugleitung 23 einmündet. Diese Bohrung 29 bildet eine Kammer aus für die Aufnahme eines sogenannten Überströmers. Dazu ist in die Kammer ein Schließventil 30 eingesetzt, welches einen die Kammer in einen oberen Teilraum 31 und in einen unteren Teilraum 32 unterteilenden, in der Kammer in Längsrichtung abgedichtet verschiebbaren Steuerkolben 33 umfaßt, der an seinem unteren Ende eine Kolbenstange 34 trägt. Diese durchsetzt eine zentrale Öffnung 35 eines ringförmigen Einsatzes 36, der sich an einer unteren Stufe 37 der sich verengenden Bohrung 29 abstützt und der über eine O-Ringdichtung 38 gegenüber der Bohrung 29 abgedichtet ist. Der Außendurchmesser der Kolbenstange ist kleiner als der Durchmesser der zentralen Öffnung 35, so daß sich zwischen den beiden Teilen ein Ringspalt ausbildet. Am unteren, aus dem Einsatz 36 hervorstehenden Ende trägt die Kolbenstange 34 einen sich konisch erweiternden Ventilkörper 39, der durch eine im unteren Teilraum 32 angeordnete, die Kolbenstange 34 umgebende, sich am Einsatz 36 und am Steuerkolben 33 abstützende Schraubenfeder 40 in eine die zentrale Öffnung 35 verschließende Anlage an dem Einsatz 36 verschoben wird.Vertical to the longitudinal direction of the suction line 23 is in radial direction towards the center gradually narrowing bore 29 in the cylinder block 7 incorporated into the space 30 between two adjacent cylinder bores 9 occurs and the in the suction line 23 opens. This bore 29 forms a chamber out for receiving a so-called Overflow. For this there is a closing valve in the chamber 30 used, which one the chamber in an upper Subspace 31 and subdividing into a lower subspace 32, sealed in the chamber in the longitudinal direction Control spool 33 includes, at its lower End carries a piston rod 34. Enforced this a central opening 35 of an annular insert 36, which narrows at a lower step 37 Bore 29 supports and that via an O-ring seal 38 is sealed off from the bore 29. The outside diameter of the piston rod is less than the diameter of the central opening 35 so that forms an annular gap between the two parts. At the lower end protruding from the insert 36 the piston rod 34 a flared Valve body 39, which by a 32 in the lower part arranged, surrounding the piston rod 34, on Insert 36 and helical spring supporting the control piston 33 40 in a closing the central opening 35 Plant on the insert 36 is moved.

In den oberen Teilraum 31 ist abgedichtet ein Verschlußkörper 41 eingesetzt, der durch eine Abschlußplatte 42 in der Bohrung 29 gehalten wird. Eine Verlängerung 43 der Kolbenstange 34 durchsetzt den Verschlußkörper 41 abgedichtet und ragt nach außen über die Abschlußplatte 42 hervor. Diese Verlängerung 43 dient zur Betätigung eines Schalters 44, der oberhalb des Zylinderblockes 7 im Hochdruckreinigungsgerät angeordnet ist. Dieser Schalter 44 schaltet bei entsprechender Betätigung den Elektromotor 1 ein bzw. aus.A closure body is sealed in the upper part space 31 41 used by an end plate 42 is held in the bore 29. An extension 43 the piston rod 34 passes through the closure body 41 sealed and protrudes outwards over the end plate 42 out. This extension 43 is used Actuation of a switch 44, which is above the cylinder block 7 arranged in the high-pressure cleaning device is. This switch 44 switches when actuated accordingly the electric motor 1 on or off.

An ihrem der Ansaugleitung 23 zugewandten inneren Ende mündet die stufige Bohrung 29 in die Ansaugleitung 23 ein.At its inner end facing the suction line 23 the stepped bore 29 opens into the suction line 23 on.

Aus dem unteren Teilraum 32 tritt parallel zur Längsachse der Zylinderbohrungen 9 ein Kanal 45 aus, der über ein Verbindungsstück 46 und über einen Kanal 47 im Zylinderkopf 8 mit dem Druckraum 20 in Verbindung steht. Das Verbindungsstück 46 ist ähnlich wie das Verbindungsstück 26 abgedichtet in Erweiterungen 48 bzw. 49 des Zylinderkopfes 8 und des Zylinderblockes 7 eingesetzt und überbrückt in diesem Bereich die Trennebene zwischen Zylinderblock 7 und Zylinderkopf 8.The lower subspace 32 emerges parallel to the longitudinal axis the cylinder bores 9 from a channel 45, the via a connector 46 and a channel 47 in the Cylinder head 8 with the pressure chamber 20 in connection stands. The connector 46 is similar to the connector 26 sealed in extensions 48 or 49 of the cylinder head 8 and the cylinder block 7 used and bridges the dividing plane in this area between cylinder block 7 and cylinder head 8.

In den oberen Teilraum 31 tritt eine Leitung 50 ein, die als im wesentlichen tangential zur Außenfläche des Zylinderblockes 7 im Bereich dessen Randes verlaufende Bohrung ausgebildet ist (Figur 4). Diese Bohrung ist so angeordnet, daß sie von der oberen Seite der stufigen Bohrung 29 aus eingebracht werden kann, zu diesem Zweck ist in der der Leitung 50 gegenüberliegenden Seitenwand der Bohrung 29 eine entsprechende Ausnehmung 51 vorgesehen, die den geradlinigen Zugang zur Leitung 50 ermöglicht.A line 50 enters the upper subspace 31, which are considered to be essentially tangential to the outer surface of the Cylinder block 7 extending in the area of its edge Bore is formed (Figure 4). This hole is like that arranged that they from the top of the tiered Hole 29 can be introduced from for this purpose is in the side wall opposite line 50 a corresponding recess 51 is provided in the bore 29, which enables straight-line access to line 50.

Die Leitung 50 mündet in einen parallel zu den Zylinderbohrungen 9 verlaufenden Kanal 52 ein, der in gleicher Weise wie der Kanal 45 über ein in der Zeichnung nicht dargestelltes Verbindungsstück mit einem in der Zeichnung ebenfalls nicht dargestellten Kanal im Zylinderkopf 8 in Verbindung steht. Dieser Kanal führt zu einer vom Druckraum 20 abgehenden Druckleitung und mündet in diese im Bereich einer Verengung der Druckleitung oder stromabwärts einer solchen Verengung ein. Diese Teile sind in der Zeichnung nicht dargestellt.The line 50 opens into a parallel to the cylinder bores 9 extending channel 52, the same Way as the channel 45 via one in the drawing not shown connector with one in the Drawing also not shown channel in the cylinder head 8 communicates. This channel leads to a outgoing from the pressure chamber 20 pressure line and opens into this in the area of a narrowing of the pressure line or downstream of such a constriction. These parts are not shown in the drawing.

Im Betrieb der beschriebenen Hochdruckreinigungsvorrichtung werden die Pumpenkolben 11 durch die Taumelscheibe 5 oszillierend angetrieben und pumpen dadurch Flüssigkeit in der beschriebenen Weise aus den Saugleitungen 18 in den Druckraum 20. Die Flüssigkeit wird dabei der Saugleitung 18 durch den Rohrstutzen 24, die Ansaugleitung 23, die Bohrungen 25 und die Verbindungsstücke 26 zugeleitet.In operation of the high-pressure cleaning device described the pump pistons 11 through the swash plate 5 driven oscillating and thereby pump Liquid in the manner described from the suction lines 18 in the pressure chamber 20. The liquid is the suction line 18 through the pipe socket 24, the Suction line 23, the holes 25 and the connectors 26 forwarded.

Im normalen Betrieb gelangt unter dem Pumpendruck stehende Flüssigkeit aus dem Druckraum 20 über den Kanal 47, das Verbindungsstück 46 und den Kanal 45 in den unteren Teilraum 32 der Bohrung 29, außerdem steht der obere Teilraum 31 über die Leitung 50 und den Kanal 52 in der beschriebenen Weise mit der Druckleitung in Verbindung. Durch die strömende Flüssigkeit in der Druckleitung stellt sich im Bereich der Verengung in der Druckleitung eine Druckabsenkung ein, durch die Drosselwirkung der Verengung ist auch stromabwärts der Verengung eine Druckabsenkung gegenüber dem Druckraum 20 vorhanden. Dadurch wird der obere Teilraum 31 mit einem Druck beaufschlagt, der niedriger ist als der Druck im unteren Teilraum 32. Dies führt gemeinsam mit der Kraft der Schraubenfeder 40 dazu, daß der Steuerkolben 33 nach oben geschoben wird, der Ventilkörper 39 verschließt dabei die zentrale Öffnung 35. Das Schließventil in der Bohrung 29 bleibt verschlossen, die von der Pumpe geförderte Flüssigkeit gelangt vom Druckraum 20 über die anschließende Druckleitung zur Handspritzpistole 22.In normal operation, the pump pressure gets below Liquid from the pressure chamber 20 via the channel 47, the connector 46 and the channel 45 in the lower Subspace 32 of the bore 29, also stands upper subspace 31 via line 50 and channel 52 in the manner described in connection with the pressure line. Due to the flowing liquid in the pressure line arises in the area of narrowing in the Pressure line a pressure drop due to the throttling effect the constriction is also downstream of the constriction a pressure drop compared to the pressure chamber 20 available. As a result, the upper subspace 31 with a Pressure applied that is lower than the pressure in the lower subspace 32. This leads together with the force the coil spring 40 so that the control piston 33rd is pushed up, the valve body 39 closes the central opening 35. The closing valve in the bore 29 remains closed by the Pump-conveyed liquid passes from the pressure chamber 20 via the subsequent pressure line to the hand spray gun 22.

Wird die Handspritzpistole 22 verschlossen, wird die Durchströmung der Druckleitung unterbunden. Bei fehlender Strömung ergibt sich im Bereich der Verengung der Druckleitung keine dynamische Druckabsenkung, der Druck in diesem Bereich ist vielmehr gleich wie der im Druckraum 20. In diesem Falle ergeben sich auch im oberen Teilraum 31 und im unteren Teilraum 32 gleiche Drücke, und entsprechend einer geeigneten Abmessung der wirksamen Druckflächen des Steuerkolbens 33 wird dieser dadurch entgegen der Wirkung der Schraubenfeder 40 nach unten verschoben, so daß sich der Ventilkörper 39 von der zentralen Öffnung 35 abhebt und diese freigibt. Damit entsteht eine Verbindung vom Druckraum 20 über den Kanal 47, das Verbindungsstück 46, den Kanal 45, den unteren Teilraum 32 und die zentrale Öffnung 35 zur Ansaugleitung 23, d. h. damit ist eine Bypassleitung von der Druckseite der Pumpe zur Saugseite geöffnet.If the handgun 22 is closed, the Flow through the pressure line is prevented. If there is no Flow results in the area of narrowing Pressure line no dynamic pressure drop, the pressure rather, this area is the same as that in the pressure room 20. In this case also arise in the upper Subspace 31 and in the lower subspace 32 the same pressures, and according to a suitable dimension of the effective Pressure surfaces of the control piston 33 becomes this against the action of the coil spring 40 after moved below, so that the valve body 39 of the central opening 35 lifts and releases this. In order to creates a connection from the pressure chamber 20 via the Channel 47, the connector 46, the channel 45, the lower section 32 and the central opening 35 to the suction line 23, d. H. this is a bypass line from opened on the pressure side of the pump to the suction side.

Die Bewegung des Steuerkolbens 33 und die Bewegung der mit diesem verbundenen Verlängerung 43 führt auch zu einer Betätigung des Schalters 44, durch den der Motor abgeschaltet werden kann. Dadurch ist es möglich, bei verschlossener Handspritzpistole einen unnötigen Betrieb des Motors zu vermeiden. Die Wiederinbetriebnahme des Motors erfolgt, wenn die Handspritzpistole 22 geöffnet wird, dadurch sinkt der Druck in der Druckleitung wieder ab, und dies führt zu einer Druckabsenkung im oberen Teilraum 31, so daß der Steuerkolben 33 unter der Wirkung der Schraubenfeder 40 wieder in die Schließstellung verschoben werden kann.The movement of the control piston 33 and the movement of the associated with this extension 43 also leads to actuation of the switch 44 by which the motor can be switched off. This makes it possible to closed handgun an unnecessary operation to avoid the engine. The restart of the engine occurs when the hand spray gun 22 is opened the pressure in the pressure line drops again, and this leads to a drop in pressure in the upper compartment 31, so that the control piston 33 under the action of the coil spring 40 in the Closed position can be moved.

Claims (15)

  1. A pump for a high-pressure cleaning appliance, comprising a cylinder block in which a plurality of parallel cylinder bores are arranged, a cylinder head connected to the cylinder block and provided with bores which are aligned with the cylinder bores of the cylinder block and, together therewith, form respective guides receiving a pump piston axially displaceable along the bores by means of a drive, pump chambers connected to the bores and provided in the cylinder head and connected to a suction line via inlet valves and a pressure line via outlet valves, and a bypass line leading from the pressure line to the suction line and closable by a closing valve, characterised in that the closing valve (30) is arranged in the cylinder block (7) in a chamber (29) extending from the outer edge of the cylinder block (7) perpendicularly to the longitudinal axis of the cylinder bores (9) into the space between the cylinder bores (9) in the cylinder block (7).
  2. A pump according to claim 1, characterised in that the chamber (29) is formed as a bore.
  3. A pump according to claim 2, characterised in that the chamber (29) tapers in a stepped manner towards its inner end.
  4. A pump according to any one of the preceding claims, characterised in that the inner end of the chamber (29) opens into the suction line (23).
  5. A pump according to claim 4, characterised in that the suction line (23) extends perpendicularly to the longitudinal axis of the cylinder bores (9) and transversely to the longitudinal axis of the chamber (29) from the outer edge of the cylinder block (7) between the cylinder bores (9) in the cylinder block (7).
  6. A pump according to any one of the preceding claims, characterised in that a control piston (33) is axially displaceably mounted in the chamber (29) and divides the latter into an upper and a lower sub-chamber (31, 32) and displaces a valve body (39) closing a valve opening (35).
  7. A pump according to claim 6, characterised in that the valve opening (35) is formed by an annular insert (36) resting against a lower step (37) of the chamber (29).
  8. A pump according to claim 7, characterised in that the valve body (39) is connected to the control piston (33) by a piston rod (34) which passes through the valve opening (35) to form an annular gap and carries the valve body (39) on its end projecting from the valve opening (35).
  9. A pump according to claim 8, characterised in that the control piston (33) is displaced radially outwards by a spring (40) so that the valve body (39) rests against the valve opening (35) and closes it.
  10. A pump according to any one of claims 6 to 9, characterised in that a channel (45) extends parallel to the longitudinal axis of the cylinder bores (9) and opens into the lower sub-chamber (32), the channel (45) being connected to a channel (47) provided in the cylinder head (8) and connected to the pressure line (20).
  11. A pump according to any one of claims 6 to 10, characterised in that a channel (50, 52) opens into the upper sub-chamber (31) and is connected to a channel in the cylinder head (8) for its part opening at a throttle point in the pressure line or downstream thereof into the pressure line.
  12. A pump according to claim 11, characterised in that the channel (50) in the cylinder block (7) is arranged so as to extend substantially tangentially to the outer edge thereof.
  13. A pump according to any one of the preceding claims, characterised in that three cylinder bores (9) are provided and are arranged at the corners of an equilateral triangle, and in that the longitudinal axis of the chamber (29) extends perpendicularly through the line connecting two corners of the triangle.
  14. A pump according to any one of the preceding claims, characterised in that the chamber (29) extends into the middle of the cylinder block (7).
  15. A pump according to any one of claims 6 to 14, characterised in that the control piston (33) has an extension (43) emerging in a sealed manner from the chamber (29) and provided for actuating a switching arrangement (44).
EP97101289A 1996-03-01 1997-01-28 Pump for a high pressure cleaning apparatus Expired - Lifetime EP0793017B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19607881 1996-03-01
DE19607881A DE19607881C2 (en) 1996-03-01 1996-03-01 Pump for a high pressure cleaning device

Publications (3)

Publication Number Publication Date
EP0793017A2 EP0793017A2 (en) 1997-09-03
EP0793017A3 EP0793017A3 (en) 1998-11-18
EP0793017B1 true EP0793017B1 (en) 2001-06-20

Family

ID=7786914

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97101289A Expired - Lifetime EP0793017B1 (en) 1996-03-01 1997-01-28 Pump for a high pressure cleaning apparatus

Country Status (4)

Country Link
EP (1) EP0793017B1 (en)
AT (1) ATE202406T1 (en)
DE (1) DE19607881C2 (en)
DK (1) DK0793017T3 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPD20030053U1 (en) 2003-07-10 2005-01-11 Lavorwash Spa HYDRAULIC PISTON AXIAL STRUCTURE
DE102007017970A1 (en) * 2007-04-11 2008-10-16 Alfred Kärcher Gmbh & Co. Kg High-pressure cleaner
DE102009049094A1 (en) 2009-10-01 2011-04-07 Alfred Kärcher Gmbh & Co. Kg Pump for a high-pressure cleaning device
DE102009049095A1 (en) 2009-10-01 2011-04-07 Alfred Kärcher Gmbh & Co. Kg Pump for a high-pressure cleaning device
DE102009049096A1 (en) * 2009-10-01 2011-04-07 Alfred Kärcher Gmbh & Co. Kg Pump for a high-pressure cleaning device
DK2771134T3 (en) * 2011-10-28 2016-06-06 Kaercher Gmbh & Co Kg Alfred Pressure Washer
JP7348286B2 (en) * 2018-12-20 2023-09-20 アルフレッド ケルヒャー エスエー ウント コンパニー カーゲー high pressure cleaning equipment

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Publication number Priority date Publication date Assignee Title
FR1453856A (en) * 1965-03-29 1966-09-30 Bennes Marrel Improvements to axial piston hydraulic pumps
US3679328A (en) * 1970-03-27 1972-07-25 Applied Power Ind Inc Variable pressure sensitive pump
DE3248622C2 (en) * 1982-12-30 1985-10-17 Alfred Kärcher GmbH & Co, 7057 Winnenden High pressure cleaning device
DE8514497U1 (en) * 1985-05-15 1985-07-18 Kränzle, Josef, 7918 Illertissen High pressure piston pump
DK165129C (en) * 1988-09-02 1993-02-22 Westergaard Knud E Ind As SHIELD PUMP PUMP PUMP, SPECIAL FOR USE IN HIGH PRESSURE CLEANING APPLIANCES
DE9013630U1 (en) * 1990-09-28 1991-01-31 Speck-Kolbenpumpenfabrik Otto Speck GmbH & Co. KG, 8192 Geretsried High pressure liquid pump
DE4338896C2 (en) * 1993-11-15 1997-03-13 Suttner Gmbh & Co Kg Axial piston pump
DE4445519C1 (en) * 1994-12-20 1996-06-05 Kaercher Gmbh & Co Alfred Piston pump for high pressure cleaning appliances
IT239544Y1 (en) * 1995-07-14 2001-03-05 Lavorwash S R L STRUCTURE OF PUMP WITH ROTARY PLATE, PARTICULARLY HYDROPULITRICI

Also Published As

Publication number Publication date
DE19607881C2 (en) 2003-07-17
ATE202406T1 (en) 2001-07-15
DK0793017T3 (en) 2001-09-03
EP0793017A2 (en) 1997-09-03
EP0793017A3 (en) 1998-11-18
DE19607881A1 (en) 1997-09-04

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