EP1664535A1 - Peristaltic pump - Google Patents

Peristaltic pump

Info

Publication number
EP1664535A1
EP1664535A1 EP04734653A EP04734653A EP1664535A1 EP 1664535 A1 EP1664535 A1 EP 1664535A1 EP 04734653 A EP04734653 A EP 04734653A EP 04734653 A EP04734653 A EP 04734653A EP 1664535 A1 EP1664535 A1 EP 1664535A1
Authority
EP
European Patent Office
Prior art keywords
hose
tube
bed
bed unit
peristaltic pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04734653A
Other languages
German (de)
French (fr)
Other versions
EP1664535B1 (en
Inventor
Markus Firmann
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.)
Innolab GmbH
Original Assignee
Innolab 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 Innolab GmbH filed Critical Innolab GmbH
Publication of EP1664535A1 publication Critical patent/EP1664535A1/en
Application granted granted Critical
Publication of EP1664535B1 publication Critical patent/EP1664535B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00Machines, pumps, or pumping installations having flexible working members
    • F04B43/12Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/1253Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00Machines, pumps, or pumping installations having flexible working members
    • F04B43/0009Special features
    • F04B43/0054Special features particularities of the flexible members
    • F04B43/0072Special features particularities of the flexible members of tubular flexible members

Definitions

  • the invention relates to a peristaltic pump according to the preamble of claim 1.
  • Peristaltic pumps essentially consist of a hose bed as a support for the hose and at least one element that squeezes the hose in a partial area. The pumping action is generated by moving the squeeze element in the longitudinal direction relative to the hose. Tappets, fingers or rollers on a rotor are known as squeeze elements.
  • the performance of peristaltic pumps is mainly determined by the design of the pump, the hose size, the hose material, the medium being pumped and the application conditions.
  • the dynamic elastic properties, the creep and flexural fatigue strength as well as the compression and tensile deformation of the hose material are decisive for the pumping effect and the service life of the hoses.
  • the hose material becomes tired due to the repeated squeezing, so that the hose cross-section and thus the hose volume in the squeezing area deviates more and more from the initial state over time.
  • the rollers exert a tensile force on the hose, which increasingly stretches it in the longitudinal direction, so that in the squeezing area Reduce the hose cross-section and the hose volume over time. The greater the contact pressure of the rollers on the hose, the greater the tensile force acting on the hose and the resulting hose expansion.
  • peristaltic pumps aims to use a certain type of pump and a certain hose to generate flow rates that are predictable, reproducible and constant within narrow limits under the same application conditions.
  • Pumps for hose by the meter therefore usually have holding devices for the hose, for example, in the form of clamps on both sides of the hose bed. If the hose bed is designed as a hose cassette that can be separated from the pump, this often has lateral cutouts for receiving stoppers that are firmly connected to the hose. Such holding devices prevent the hose from shifting in the pump, but not that it elongates in the pinch area due to the tensile force exerted on it by the rollers in the longitudinal direction.
  • the hose in WO 95/11383 has a perforated longitudinal rib which is screwed tightly to a two-part hose bed. This prevents both the displacement of the hose in the hose bed and the stretching in the squeezing area.
  • the assembly of the hose on the pump is, however, complex and difficult to carry out with small hoses. Multi-channel pumps can also only be realized with such a construction to a limited extent.
  • No. 4,494,285 (D2) describes a method for producing an elastic lumen, which is sprayed directly onto a tubular bed. This prevents elongation of the lumen in the longitudinal direction.
  • this solution is countered by the fact that the production process is complex and, for example, small lumens or multi-channel ones Executions are only possible to a limited extent. To assemble the lumen, the entire pump unit with rotor must also be removed.
  • the reproducibility of flow rates generated with hose cassettes and hoses with stoppers can therefore not be better than the reproducibility of the hose preload.
  • the constancy of the flow rate is at best as good as the time course of the hose expansion in the squeezed area.
  • the reproducibility of the hose pre-tension in hose cassettes is adversely affected by the following inadequacies: First, the stoppers are usually of different sizes depending on the hose dimensions, so that their position in the cutouts of the hose cassettes designed for the largest stoppers is often not sufficiently defined.
  • the tubes can be inserted into the tube cassette rotated about their longitudinal axis.
  • the specified distance between the stoppers can often not be kept sufficiently reproducible with today's manufacturing processes and fourthly, the different hose materials and dimensions would require an optimized pre-tensioning with a specific stopper distance, which is usually neglected in favor of a standardized manufacture.
  • Hose cartridges can also be fitted with new hoses several times and reused, their properties can change over time due to fatigue, defects or the influence of chemicals, which also adversely affects the reproducibility and consistency of the generated flow rates. There is also the risk that the hose that is not fixed in the hose bed can be pinched and damaged due to incorrect operation when the hose cassette is placed on the pump.
  • hose-hose bed unit with a hose bed produced by injection molding in bottom view, top view, top view and in cross section 2A-C hose-hose bed unit with hose bed made of strip material in bottom view, top view and top view,
  • FIG. 7 cross section of a fifth embodiment of the
  • 13 shows a fourth embodiment of the hose clamp area in top view
  • 14 shows a first exemplary embodiment of a tube-tube bed unit with holding device and rotor in plan view
  • FIG. 15 is a side view of a holding device of the first exemplary embodiment
  • FIG. 16 shows a second exemplary embodiment of a hose-hose-bed unit with spring-loaded holding device and rotor in a top view
  • FIGS. 1A to 1D The embodiment of a tube-tube bed unit 1 shown in FIGS. 1A to 1D in bottom view, top view, top view and in cross section consists of a tube bed 2 produced by the injection molding process and one that is fixed and cannot be separated from the tube bed via a contact surface 4 in a squeeze area 5 2 connected hose 3.
  • the hose-hose bed unit 1 has recesses 6, 6 'as fastening means, which are matched to corresponding cams as holding devices on the pump. Further features of this embodiment are handles 18, 18 'and extensions of the hose bed 2, which are designed as hose clamp areas 8, 8', and a labeling area 7.
  • the labeling area 7 provides space for information about the pumped medium, the date of commissioning or others for Quality assurance and traceability important information.
  • the main advantage of a hose bed 2 produced by the injection molding process is that its curvature can be optimally matched to the radius of a rotor. Furthermore, this type of manufacture allows a certain freedom in the design of fastening means, operating elements and surface structure of the hose-hose bed unit 1.
  • the embodiment of the hose-hose bed unit 1 shown in FIGS. 2A to 2C in bottom view, top view and top view consists of one Band material produced hose bed 2 and a fixed via a contact surface 4 in the pinch area 5 and not separable with the Hose bed 2 connected hose 3.
  • the hose-hose bed unit 1 has, for example, cutouts 6, 6 ′ as fastening means, which are matched to the corresponding holding devices on the pump.
  • hose bed 2 which are designed as hose clamp areas 8, 8 ', and a labeling area 7.
  • the advantage of a hose bed 2 made of strip material consists primarily in the fact that specific lengths of the rotor are adapted for different rotor sizes
  • Hose-hose bed unit 1 can also be produced inexpensively in small series.
  • the strip material for the tubular bed 2 is preferably to be selected such that it has sufficient tensile strength in the longitudinal direction and at the same time the lowest possible bending tension when the rotor is wrapped around.
  • the recesses 6, 6 ', which serve, for example, as fastening means, and the hose clamp regions 8, 8' of hose-hose bed units 1 made of strip material are preferably produced by stamping. FIGS.
  • FIGS. 3 to 9 show the cross sections of different embodiments of the hose-hose bed unit 1 in the pinch area 5. All variants have in common that firstly the hose bed 2 is fixedly and inseparably connected to the hose 3 at least in the pinch area 5 and secondly the material and / or the cross-section of the hose bed 2 are suitable for reducing the extensibility of the hose-hose bed unit 1 in the longitudinal direction in the squeeze area 5 such that it is less in comparison to the hose 3 alone. Analogously, all of the embodiments having these features also come within the scope of the invention, which result from the combination or modification of the embodiments shown in FIGS. 3 to 9.
  • the hose-hose-bed unit 1 is preferably manufactured by manufacturing the hose-bed 2 and the hose 3 individually and then connecting them firmly and inseparably, for example by gluing or welding (FIGS. 3-6) or with a combined hard / soft injection molding - or extrusion process ren, in which the composite takes place during manufacture (Fig. 7, 8).
  • FIG. 3 shows the cross section of an embodiment of the hose-hose bed unit 1, consisting of, for example, a concavely curved hose bed 2 'and a hose 3 with a tangential contact surface 4, which is glued or welded to the hose bed 2, for example.
  • the concave curvature of the hose bed 2 and the contact surface 4 centers the hose 3 in the middle of the hose bed 2 and prevents it from tipping sideways during the squeezing process.
  • the contact surface 4 consists of the same elastomeric material as the hose 3, which acts as a spring and can thus compensate for tolerances in the pinch dimension and in the contact pressure in a certain range.
  • FIG. 4 shows the cross section of an embodiment of the hose-hose bed unit 1, in which a longitudinal rib 20 of the hose 3 is glued into a corresponding recess in the hose bed 2 or welded to it.
  • FIG. 5 shows the cross section of an embodiment of the hose-hose bed unit 1, in which the hose 3 has a non-circular cross-sectional area inside and outside.
  • the firm, inseparable connection of the hose bed 2 to the hose 3 uniquely determines the torsional position of the hose 3 in the longitudinal axis.
  • the shape of the cross-sectional area of hose 3 inside and outside can in principle be chosen freely and optimized, for example, for a long service life or for gentle pumping.
  • FIG. 6 shows the cross section of an embodiment of the hose-hose bed unit, in which the hose bed 2 has flexible extensions 21, 21 'as a receptacle for the hose 3.
  • the extensions 21, 21 ' are connected to the hose 3, for example by gluing or welding, and are not separable.
  • This embodiment has the advantage that existing tubular fabric with a circular inner and outer cross section can be used.
  • FIG. 7 shows the cross section of an embodiment of the hose-hose bed unit 1, in which the hose bed 2 and the hose 3 are co-extruded as a hard / soft composite. The extruded piece goods are cut, the tubular bed 2 is shortened to the necessary length and provided with suitable fastening means.
  • FIG. 8 shows the cross section of an embodiment of the hose-hose bed unit 1, in which the hose bed 2 contains reinforcing elements 22, such as foils, tapes, filaments or fibers, which are suitable for the extensibility of the hose-hose bed unit 1 in the longitudinal direction to reduce that this is lower compared to hose 3 alone.
  • This embodiment is preferably produced by supplying the reinforcing elements 22 to the tubular bed 2 as a bypass during the extrusion. The extruded piece goods are cut, the tubular bed 2 is shortened to the necessary length and provided with suitable fastening means.
  • FIG. 9 shows the cross section of an embodiment of the hose-hose bed unit 1, in which the hose bed 2 and the hose 3 are made of the same material and do not contain any additional, reinforcing element 22.
  • This embodiment only allows a substantial reduction in the extensibility of the hose 3 in the longitudinal direction if the cross section of the hose bed 2 is larger than the material cross section of the hose 3.
  • FIG. 10 A, B shows the embodiment of a hose clamp region 8 already shown in FIG. 2 with a hose 3 clamped and squeezed in the slot 9 in top view and side view.
  • the distance between the inner flanks the leg 10, 10 'of the hose clamp area 8 decreases continuously from the outside and merges into a preferably constant width of the slot 9. This favors a simple and effortless insertion of the hose 3 from the outside into the slot 9, to the extent that the hose 3 is squeezed to the desired extent and the flow of medium is partially or completely prevented.
  • FIG. 11 shows a top view of a closed, lockable embodiment of a hose clamp area 8 with a leg 10 'which has an extension 11 which engages in a suitable opening on the opposite leg 10, thereby preventing the two legs 10, 10' from can open over time by the pressure of the pinched hose 3.
  • a lockable embodiment is particularly suitable for hard hose materials or if the hose 3 must remain securely squeezed off for a long time.
  • the hose clamp area 8 is opened by moving one of the legs 10, 10 ′ out of the common plane, as a result of which the extension 11 jumps out of the opening in leg 10.
  • FIG. 12 shows a top view of a further closed, lockable embodiment of a hose clamp area 8 with two legs 10, 10 ', which can be interlocked with one another, thereby preventing the two legs 10, 10' from being pressed together by the pressure of the clamped hose 3 can open with time.
  • FIG. 13 shows a top view of a further closed, lockable embodiment of a hose clamp area 8, in which the legs 10, 10_ 'have an interlocking, self-locking toothing 12.
  • the width of the slot 9 can be gradually reduced by pressing on the outside of the legs 10, 10 'until the hose 3 is squeezed to the desired extent and the flow of medium is partially or completely prevented.
  • the hose clamp area 8 is opened by moving one of the legs 10, 10 'out of the common plane, as a result of which the toothing 12 is released.
  • FIG. 14 shows the hose-hose bed unit 1 known from FIG. 1 with a hose bed 2 produced by the injection molding process together with holding devices 15, 15a and the rollers 13 of a rotor 14 as squeezing elements.
  • the following explanations also apply mutatis mutandis to hose-hose bed units 1 with a hose bed 2 made of strip material according to FIG. 2.
  • hose-hose bed unit 1 is attached to the pump by inserting the hose 3 on both sides into a slot 16 of a holding device 15, 15a and the pressure on the hose-bed unit 1 via the inside of the pump Handles 18 and 18 'are raised until cams 17 and 17a of the holding device 15, 15a snap into the recesses 6, 6' of the hose bed 2 which serve as fastening means.
  • the hose-hose bed unit 1 is thus fastened in a clear position relative to the rollers 13, as a result of which a defined and reproducible pressing force is set on the hose 3.
  • the hose-hose bed unit 1 can be separated from the pump by simultaneously pressing the outside of the handles 18 and 18 ', the recesses 6, 6' of the hose bed 2 serving as fastening means from the cams 17, 17a of the holding devices 15, 15a are lifted off, and thereby the connection of the hose-hose bed unit 1 to the holding device 15, 15a is released.
  • 14 shows that the preferred embodiment of the holding device 15, 15a allows the simultaneous fastening of two opposite hose-hose-bed units 1 and 1a.
  • the contact pressure can be adjusted in stages.
  • the contact pressure of the hose-hose-bed unit 1 on the squeeze elements can be adjusted in accordance with the pressure to be generated.
  • FIG. 15 shows the holding device 15 in a side view.
  • FIG. 16 shows the hose-hose-bed unit 1 already known from FIG. 1 with a spring-mounted holding device 15, 15a and the rollers 13 of a rotor 14 as squeezing elements in a top view.
  • Springs 23, 23a have cams 24, 24a which are matched to the cutouts 6, 6 'of the tubular bed 2.
  • the spring 23a sets the hose-hose-bed unit 1 under a certain tension, which causes a corresponding contact pressure of the hose-hose-bed unit 1 against the rollers 13 of the rotor 14.
  • the holding device 15, 15a can have springs on one or both sides, which can also be designed to be exchangeable for different pressing forces. As already in FIG.
  • the hose-hose bed unit 1 a is shown here also relieved of contact pressure by the cam 24 of the spring 23 engaging in the recess 19 a and the cam 17 a ′ of the holding device 15 a in the recess 19 a ′.
  • the pressure occurring in the hose 3 can be reliably limited.
  • the internal pressure exceeds a certain value, that determined by the spring 23a, from the tubular bed 2 to the tube 3
  • the contact pressure acting on the squeeze elements no longer completely closes the tube lumen, as a result of which a backflow takes place and the pumping action decreases accordingly.
  • each new hose-and-bed unit 1 does not only consist of a new hose 3 but also always of a new hose bed 2. This ensures that reproducible starting conditions are always ensured, regardless of the embodiment.
  • the hose-hose-bed unit 1 is preferably described here in connection with pumps which have a rotor and rollers as squeeze elements, it is not tied to a specific type, design or dimension of squeeze elements and can also be used, for example, with fingers or plungers. Pumps are used.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Diaphragms And Bellows (AREA)

Abstract

The invention relates to a peristaltic pump comprising a tube-tube bed unit ( 1 ) which is connected in a rigid manner to the tube ( 3 ) in the pressed region ( 5 ) and which can not be separated from the tube bed ( 2 ). The tube-tube bed unit ( 1 ) comprises features or means ( 6, 6' ) which enable the pump to be fixed in a simple, precise and reproducible manner in relation to the rotor. In the pressed region ( 5 ), the tube ( 3 ) can be effectively prevented from being displaced or stretched corresponding to the decrease in the cross-section due to the tube-tube bed unit (1) and twisting of the tube ( 3 ) around the longitudinal axis is impossible in principle. The tube-tube bed unit ( 1 ) comprises a marking area, integrated tube clamping areas and grips ( 18, 18' ). Preferably, the tube-tube bed unit ( 1 ) is produced by firmly and non-detachably connecting a tube bed ( 2 ), produced according to the inventive method, to a tube, which has a contact surface ( 4 ) which is adjusted to the tube bed (2), by means of adhesive or welding or by coextruding the tube ( 3 ) and the tube bed ( 2 ).

Description

Peristaltikpumpeperistaltic pump
Die Erfindung betrifft eine Peristaltikpumpe ge äss dem Oberbegriff des Patentanspruches 1. Peristaltikpumpen bestehen im Wesentlichen aus einem Schlauchbett als Auflage für den Schlauch und mindestens einem Element, das den Schlauch in einem Teilbereich quetscht. Die Pumpwirkung wird erzeugt indem das Quetschelement relativ zum Schlauch in Längsrichtung bewegt wird. Als Quetschelemen- te sind Stössel, Finger oder Rollen auf einem Rotor bekannt. Die Leistung von Peristaltikpumpen wird hauptsächlich von der konstruktiven Ausführung der Pumpe, von der Schlauchdimension, vom Schlauchmaterial sowie vom gepumpten Medium und den Anwendungsbedingungen bestimmt. Entscheidend für die Pumpwir- kung und die Lebensdauer der Schläuche sind die dynamischelastischen Eigenschaften, die Kriech- und Biegewechselfestigkeit sowie der Druck- und Zugverformungsrest des Schlauchmaterials. Diese Eigenschaften sind ihrerseits abhängig vom gepumpten Medium, von spezifischen Anwendungsbedin- gungen wie Temperatur und Druck, sowie vom Gebrauchsalter der Schläuche, d.h. der Anzahl und Dynamik der bereits erfolgten Quetschvorgänge in einem bestimmten Zeitraum. Aufgrund der Vielzahl von teils zeitabhängigen Einflussfaktoren ist es sehr schwierig, mit Peristaltikpumpen konstante Fliessraten zu erzeugen. In der Praxis nehmen diese mit der Zeit meist ab, wobei der zeitliche Verlauf und das Ausmass der Drift anwendungsspezifisch sind und im Allgemeinen nicht vorausgesagt werden können. Auch unter idealen Bedingungen kann daher mit bekannten Peristaltikpumpen und Schlauchmaterialien nur über Minuten bis Stunden eine konstante Fliessrate erzeugt werden. Zwei hauptsächliche Effekte sind für die Drift der Fliessrate verantwortlich. Einerseits ermüdet das Schlauchmaterial durch die wiederholten Quetschungen, so dass der Schlauchquerschnitt und damit das Schlauchvolumen im Quetschbereich mit der Zeit immer stärker vom Ausgangszustand abweicht. Andererseits üben, vor allem bei Pumpen mit Rotor, die Rollen eine Zugkraft auf den Schlauch aus, welche diesen zunehmend in Längsrichtung dehnt, so dass sich im Quetschbereich der Schlauchquerschnitt und das Schlauchvolumen mit der Zeit verringern. Je grösser dabei die Anpresskraft der Rollen auf den Schlauch ist, desto grösser ist meist auch die auf den Schlauch wirkende Zugkraft und die sich dadurch einstellende Schlauchdehnung.The invention relates to a peristaltic pump according to the preamble of claim 1. Peristaltic pumps essentially consist of a hose bed as a support for the hose and at least one element that squeezes the hose in a partial area. The pumping action is generated by moving the squeeze element in the longitudinal direction relative to the hose. Tappets, fingers or rollers on a rotor are known as squeeze elements. The performance of peristaltic pumps is mainly determined by the design of the pump, the hose size, the hose material, the medium being pumped and the application conditions. The dynamic elastic properties, the creep and flexural fatigue strength as well as the compression and tensile deformation of the hose material are decisive for the pumping effect and the service life of the hoses. These properties in turn depend on the pumped medium, on specific application conditions such as temperature and pressure, and on the age of use of the hoses, ie the number and dynamics of the crimping processes that have already taken place within a certain period of time. Due to the large number of influencing factors, some of which are time-dependent, it is very difficult to generate constant flow rates with peristaltic pumps. In practice, these usually decrease over time, although the course and extent of the drift are application-specific and cannot generally be predicted. Even under ideal conditions, known peristaltic pumps and hose materials can therefore only generate a constant flow rate over minutes to hours. Two main effects are responsible for the drift of the flow rate. On the one hand, the hose material becomes tired due to the repeated squeezing, so that the hose cross-section and thus the hose volume in the squeezing area deviates more and more from the initial state over time. On the other hand, especially in the case of pumps with a rotor, the rollers exert a tensile force on the hose, which increasingly stretches it in the longitudinal direction, so that in the squeezing area Reduce the hose cross-section and the hose volume over time. The greater the contact pressure of the rollers on the hose, the greater the tensile force acting on the hose and the resulting hose expansion.
Allgemein zielt die Konstruktion von Peristaltikpumpen darauf ab, mit einer bestimmten Bauart von Pumpe und einem bestimmten Schlauch Fliessraten zu erzeugen, die unter gleichen Anwendungsbedingungen in engen Grenzen vorhersagbar, reprodu- zierbar und konstant sind.In general, the design of peristaltic pumps aims to use a certain type of pump and a certain hose to generate flow rates that are predictable, reproducible and constant within narrow limits under the same application conditions.
Vor allem bei Pumpen mit Rotor muss dabei verhindert werden, dass sich der Schlauch im Quetschbereich durch die auf ihn ausgeübte Zugkraft der Rollen in Längsrichtung verschiebt. Pumpen für Schlauch-Meterware weisen daher meist auf beiden Seiten des Schlauchbetts beispielsweise als Klemmen ausgeführte Haltevorrichtungen für den Schlauch auf. Ist das Schlauchbett als von der Pumpe trennbare Schlauchkassette ausgeführt, so weist diese oft seitliche Aussparungen für die Aufnahme von fest mit dem Schlauch verbundenen Stoppern auf. Solche Haltevorrichtungen verhindern, dass sich der Schlauch in der Pumpe verschiebt, nicht jedoch, dass er sich im Quetschbereich durch die auf ihn ausgeübte Zugkraft der Rollen in Längsrichtung dehnt. Um dies zu verhindern, weist der Schlauch in WO 95/11383 (Dl) eine gelochte Längsrippe auf, die mit einem zweiteiligen Schlauchbett fest verschraubt wird. Auf diese Weise wird sowohl die Verschiebung des Schlauchs im Schlauchbett wie auch die Dehnung im Quetschbereich verhindert. Die Montage des Schlauchs an der Pumpe ist jedoch aufwändig und bei kleinen Schläuchen schwierig durchzuführen. Mehrkanalige Pumpen können zudem mit einer solchen Konstruktion nur bedingt realisiert werden.Especially in the case of pumps with a rotor, it must be prevented that the hose in the pinch area is displaced in the longitudinal direction due to the tensile force exerted on it by the rollers. Pumps for hose by the meter therefore usually have holding devices for the hose, for example, in the form of clamps on both sides of the hose bed. If the hose bed is designed as a hose cassette that can be separated from the pump, this often has lateral cutouts for receiving stoppers that are firmly connected to the hose. Such holding devices prevent the hose from shifting in the pump, but not that it elongates in the pinch area due to the tensile force exerted on it by the rollers in the longitudinal direction. In order to prevent this, the hose in WO 95/11383 (DI) has a perforated longitudinal rib which is screwed tightly to a two-part hose bed. This prevents both the displacement of the hose in the hose bed and the stretching in the squeezing area. The assembly of the hose on the pump is, however, complex and difficult to carry out with small hoses. Multi-channel pumps can also only be realized with such a construction to a limited extent.
In US 4,494,285 (D2) ist ein Verfahren zur Herstellung eines elastischen Lumens beschrieben, welches direkt an ein Schlauchbett gespritzt wird. Die Dehnung des Lumens in Längsrichtung wird so verhindert. Einer breiten Verwendung dieser Lösung steht jedoch entgegen, dass das Herstellverfahren aufwändig ist und beispielsweise kleine Lumina oder mehrkanalige Ausführungen nur eingeschränkt möglich sind. Für die Montage des Lumens muss zudem die gesamte Pumpeinheit mit Rotor demontiert werden.No. 4,494,285 (D2) describes a method for producing an elastic lumen, which is sprayed directly onto a tubular bed. This prevents elongation of the lumen in the longitudinal direction. However, the widespread use of this solution is countered by the fact that the production process is complex and, for example, small lumens or multi-channel ones Executions are only possible to a limited extent. To assemble the lumen, the entire pump unit with rotor must also be removed.
Trotz ihrer spezifischen Vorteile werden die in Dl, D2 be- schriebenen Lösungen in der Praxis kaum verwendet, da sie den heutigen Ansprüchen an Einfachheit, Sicherheit sowie Flexibilität und schnellen Schlauchwechsel bei gleichzeitig geringen Herstellkosten nicht genügen. Breite Verwendung finden Pumpen mit Schlauchkassetten für Schläuche mit Stoppern wie in EP 1 400 691 (D3) beschrieben, bei denen der Schlauch im Quetschbereich nicht fixiert ist. Bei dieser und ähnlichen Lösungen wird der Schlauch beim Einlegen in die Schlauchkassette und zusätzlich beim Aufsetzen der Schlauchkassette auf die Pumpe in Längsrichtung um etwa 10 - 30 % gedehnt. Diese Vorspannung kann die zusätzliche, durch die Zugkraft der Rollen hervorgerufene Längsdehnung des Schlauchs wohl etwas verringern, nicht aber verhindern, so dass mit zunehmender Längsdehnung der Schlauchquerschnitt und die Fliessrate abnehmen. Prinzipbedingt kann die Reproduzier- barkeit von mit Schlauchkassetten und Schläuchen mit Stoppern erzeugten Fliessraten daher nicht besser sein als die Reproduzierbarkeit der Schlauch-Vorspannung. Auch die Konstanz der Fliessrate ist bestenfalls so gut, wie der zeitliche Verlauf der Schlauchdehnung im Quetschbereich. Die Reproduzierbarkeit der Schlauch-Vorspannung in Schlauchkassetten wird durch folgende Unzulänglichkeiten ungünstig beeinflusst: Erstens sind die Stopper je nach Schlauchdimension meist verschieden gross, so dass deren Lage in den für die grössten Stopper ausgelegten Aussparungen der Schlauch- kassetten oft nicht genügend genau definiert ist. Zweitens können die Schläuche um ihre Längsachse verdreht in die Schlauchkassette eingelegt werden. Drittens kann der vorgegebene Abstand zwischen den Stoppern mit den heutigen Herstellverfahren oft nicht genügend reproduzierbar eingehalten wer- den und viertens würden die verschiedenen Schlauchmaterialien und -dimensionen eine optimierte Vorspannung mit einem spezifischen Stopperabstand erfordern, was zugunsten einer standardisierten Herstellung meist vernachlässigt wird. Da Schlauchkassetten zudem mehrfach mit neuen Schläuchen bestückt und wieder verwendet werden, können sich deren Eigenschaften mit der Zeit durch Ermüdung, Defekt oder Einfluss von Chemikalien verändern, wodurch die Reproduzierbarkeit und die Konstanz der erzeugten Fliessraten zusätzlich ungünstig beeinflusst werden. Weiter besteht die Gefahr, dass der im Schlauchbett nicht fixierte Schlauch durch Fehlbedienung beim Aufsetzen der Schlauchkassette auf die Pumpe eingeklemmt und beschädigt werden kann. Da die Reproduzierbarkeit und die Konstanz der mit bekannten Peristaltikpumpen erzeugten Fliessraten, speziell von solchen mit Schlauchkassetten als Schlauchbett und Rollen auf einem Rotor als Quetschelementen, für spezielle Anforderungen oft nicht genügt, muss die gewünschte Fliessrate durch Verände- rung der Rotor-Drehzahl regelmässig wieder hergestellt werden. Nicht möglich ist dies bei Pumpen mit konstanter, nicht veränderbarer Drehzahl, sowie nur bedingt bei mehrkanaligen Pumpen mit gemeinsamem Antrieb für alle Kanäle. Zusammenfassend wird festgestellt, dass es mit Peristaltik- pumpen heutiger Bauart, für spezielle Anforderungen nur eingeschränkt möglich ist, die erstrebenswerten Fliessraten mit der nötigen Reproduzierbarkeit und Konstanz zu erreichen. Es ist Aufgabe der Erfindung, Peristaltikpumpen ge äss dem Oberbegriff des Patentanspruchs 1 derart zu verbessern, dass bei geringem baulichem und herstellungsmässigem Aufwand gleichzeitig eine einfache und sichere Handhabung sowie ein Höchstmass an Reproduzierbarkeit und Konstanz der Fliessrate erreicht wird. Die Lösung der Aufgabe ist wiedergegeben im kennzeichnenden Teil des Patentanspruches 1 hinsichtlich ihrer Hauptmerkmale, in den weiteren Patentansprüchen hinsichtlich weiterer vorteilhafter Ausbildungen.In spite of their specific advantages, the solutions described in DI, D2 are hardly used in practice, since they do not meet today's demands for simplicity, safety, flexibility and quick hose replacement with low manufacturing costs. Pumps with hose cassettes are widely used for hoses with stoppers as described in EP 1 400 691 (D3), in which the hose is not fixed in the squeezing area. With this and similar solutions, the hose is elongated by about 10 - 30% in the longitudinal direction when it is inserted into the hose cassette and additionally when the hose cassette is placed on the pump. This pretensioning can somewhat reduce the additional longitudinal expansion of the hose caused by the tensile force of the rollers, but not prevent it, so that the hose cross section and the flow rate decrease with increasing longitudinal expansion. Due to the principle, the reproducibility of flow rates generated with hose cassettes and hoses with stoppers can therefore not be better than the reproducibility of the hose preload. The constancy of the flow rate is at best as good as the time course of the hose expansion in the squeezed area. The reproducibility of the hose pre-tension in hose cassettes is adversely affected by the following inadequacies: First, the stoppers are usually of different sizes depending on the hose dimensions, so that their position in the cutouts of the hose cassettes designed for the largest stoppers is often not sufficiently defined. Secondly, the tubes can be inserted into the tube cassette rotated about their longitudinal axis. Thirdly, the specified distance between the stoppers can often not be kept sufficiently reproducible with today's manufacturing processes and fourthly, the different hose materials and dimensions would require an optimized pre-tensioning with a specific stopper distance, which is usually neglected in favor of a standardized manufacture. There Hose cartridges can also be fitted with new hoses several times and reused, their properties can change over time due to fatigue, defects or the influence of chemicals, which also adversely affects the reproducibility and consistency of the generated flow rates. There is also the risk that the hose that is not fixed in the hose bed can be pinched and damaged due to incorrect operation when the hose cassette is placed on the pump. Since the reproducibility and consistency of the flow rates generated with known peristaltic pumps, especially those with hose cassettes as a hose bed and rollers on a rotor as squeezing elements, are often not sufficient for special requirements, the desired flow rate must be regularly restored by changing the rotor speed become. This is not possible with pumps with constant, unchangeable speed, and only to a limited extent with multi-channel pumps with a common drive for all channels. In summary, it is stated that with today's peristaltic pumps, it is only possible to a limited extent for special requirements to achieve the desirable flow rates with the necessary reproducibility and constancy. It is an object of the invention to improve peristaltic pumps according to the preamble of claim 1 in such a way that simple and safe handling and maximum reproducibility and consistency of the flow rate are achieved with little structural and manufacturing expense. The solution to the problem is given in the characterizing part of claim 1 with regard to its main features, in the further claims with regard to further advantageous developments.
Die Erfindung wird näher erläutert anhand der beigefügten Zeichnungen. Es zeigenThe invention is explained in more detail with reference to the accompanying drawings. Show it
Fig. 1A-D Schlauch-Schlauchbett-Einheit mit im Spritzgussverfahren hergestelltem Schlauchbett in Untenansicht, Draufsicht, Obenansicht und im Querschnitt, Fig. 2A-C Schlauch-Schlauchbett-Einheit mit Schlauchbett aus Bandmaterial in Untenansicht, Draufsicht und Obenansicht,1A-D hose-hose bed unit with a hose bed produced by injection molding in bottom view, top view, top view and in cross section, 2A-C hose-hose bed unit with hose bed made of strip material in bottom view, top view and top view,
Fig. 3 Querschnitt eines ersten Ausführungsbeispiels der Schlauch-Schlauchbett-Einheit,3 cross section of a first embodiment of the hose-hose bed unit,
Fig. 4 Querschnitt eines zweiten Ausführungsbeispiels der Schlauch-Schlauchbett-Einheit,4 cross section of a second embodiment of the hose-hose bed unit,
Fig. 5 Querschnitt eines dritten Ausführungsbeispiels der Schlauch-Schlauchbett-Einheit,5 cross section of a third embodiment of the hose-hose bed unit,
Fig. 6 Querschnitt eines vierten Ausführungsbeispiels der Schlauch-Schlauchbett-Einheit,6 cross section of a fourth embodiment of the hose-hose bed unit,
Fig. 7 Querschnitt eines fünften Ausführungsbeispiels derFig. 7 cross section of a fifth embodiment of the
Schlauch-Schlauchbett-Einheit,Hose-tube bed unit,
Fig. 8 Querschnitt eines sechsten Ausführungsbeispiels der Schlauch-Schlauchbett-Einheit,8 cross section of a sixth embodiment of the hose-hose bed unit,
Fig. 9 Querschnitt eines siebten Ausführungsbeispiels der Schlauch-Schlauchbett-Einheit,9 cross section of a seventh exemplary embodiment of the hose-hose bed unit,
Fig. 10A-B ein erstes Ausführungsbeispiel des Schlauchklemmenbereiches in Obenansicht und Seitenansicht,10A-B a first embodiment of the hose clamp area in top view and side view,
Fig. 11 ein zweites Ausführungsbeispiel des Schlauchklemmenbereiches in Obenansicht,11 shows a second embodiment of the hose clamp area in top view,
Fig. 12 ein drittes Ausführungsbeispiel des Schlauchklemmenbereiches in Obenansicht,12 shows a third embodiment of the hose clamp area in top view,
Fig. 13 ein viertes Ausführungsbeispiel des Schlauchklemmenbereiches in Obenansicht, Fig. 14 ein erstes Ausführungsbeispiel einer Schlauch- Schlauchbett-Einheit mit Haltevorrichtung und Rotor in Draufsicht,13 shows a fourth embodiment of the hose clamp area in top view, 14 shows a first exemplary embodiment of a tube-tube bed unit with holding device and rotor in plan view,
Fig. 15 eine Haltevorrichtung des ersten Ausführungsbeispiels in Seitenansicht,15 is a side view of a holding device of the first exemplary embodiment,
Fig. 16 ein zweites Ausführungsbeispiel einer Schlauch- Schlauchbett-Einheit mit gefederter Haltevorrich- tung und Rotor in Draufsicht,16 shows a second exemplary embodiment of a hose-hose-bed unit with spring-loaded holding device and rotor in a top view,
Die in den Figuren 1A bis 1D in Untenansicht, Draufsicht, Obenansicht und im Querschnitt dargestellte Ausführungsform einer Schlauch-Schlauchbett-Einheit 1 besteht aus einem im Spritzgussverfahren hergestellten Schlauchbett 2 und einem über eine Kontaktfläche 4 in einem Quetschbereich 5 fest und nicht trennbar mit dem Schlauchbett 2 verbundenen Schlauch 3. Die Schlauch-Schlauchbett-Einheit 1 weist als Befestigungsmittel Aussparungen 6, 6' auf, welche auf entsprechende Nok- ken als Haltevorrichtung an der Pumpe abgestimmt sind. Weitere Merkmale dieser Ausführungsform sind Griffe 18, 18' und Fortsätze des Schlauchbetts 2, die als Schlauchklemmenbereiche 8, 8' ausgebildet sind, sowie ein Beschriftungsbereich 7. Der Beschriftungsbereich 7 bietet Platz für Angaben über das gepumpte Medium, das Datum der Inbetriebnahme oder andere für Qualitätssicherung und Rückverfolgbarkeit wichtige Informationen. Der Vorteil eines im Spritzgussverfahren hergestellten Schlauchbetts 2 besteht vor allem darin, dass dessen Krümmung optimal auf den Radius eines Rotors abgestimmt wer- den kann. Weiter erlaubt diese Herstellungsart eine gewisse Freiheit in der Gestaltung von Befestigungsmitteln, Bedienelementen und Oberflächenstruktur der Schlauch- Schlauchbett-Einheit 1. Die in den Figuren 2A bis 2C in Untenansicht, Draufsicht und Obenansicht dargestellte Ausführungsform der Schlauch- Schlauchbett-Einheit 1 besteht aus einem aus Bandmaterial hergestellten Schlauchbett 2 und einem über eine Kontaktfläche 4 im Quetschbereich 5 fest und nicht trennbar mit dem Schlauchbett 2 verbundenen Schlauch 3. Die Schlauch- Schlauchbett-Einheit 1 weist als Befestigungsmittel beispielsweise Aussparungen 6, 6' auf, welche auf die entsprechenden Haltevorrichtungen an der Pumpe abgestimmt sind. Wei- tere Merkmale dieser Ausführungsform sind Fortsätze des Schlauchbetts 2, die als Schlauchklemmenbereiche 8, 8' ausgebildet sind, sowie ein Beschriftungsbereich 7. Der Vorteil eines Schlauchbetts 2 aus Bandmaterial besteht vor allem darin, dass für verschiedene Rotorgrössen angepasste, spezifi- sehe Längen der Schlauch-Schlauchbett-Einheit 1 auch in Kleinserie kostengünstig hergestellt werden können. Das Bandmaterial für das Schlauchbett 2 ist dabei vorzugsweise so zu wählen, dass dieses eine ausreichende Zugfestigkeit in Längsrichtung und gleichzeitig eine möglichst geringe Biegespan- nung bei der Umschlingung des Rotors aufweist. Die beispielsweise als Befestigungsmittel dienenden Aussparungen 6, 6' und die Schlauchklemmenbereiche 8, 8' von Schlauch-Schlauchbett- Einheiten 1 aus Bandmaterial werden vorzugsweise durch Stanzen hergestellt. Die Figuren 3 bis 9 zeigen die Querschnitte verschiedener Ausführungsformen der Schlauch-Schlauchbett-Einheit 1 im Quetschbereich 5. Allen Varianten ist gemeinsam, dass erstens das Schlauchbett 2 mindestens im Quetschbereich 5 fest und nicht trennbar mit dem Schlauch 3 verbunden ist und zweitens das Material und/oder der Querschnitt des Schlauchbetts 2 geeignet sind, die Dehnbarkeit der Schlauch-Schlauchbett- Einheit 1 in Längsrichtung im Quetschbereich 5 so herabzusetzen, dass diese geringer ist im Vergleich zum Schlauch 3 alleine. Sinngemäss fallen auch alle diese Merkmale aufweisen- den Ausführungsformen unter den Gedanken der Erfindung, welche durch Kombination oder Abwandlung der in Fig. 3 - 9 dargestellten Ausführungsformen hervorgehenden. Die Schlauch- Schlauchbett-Einheit 1 wird vorzugsweise hergestellt, indem das Schlauchbett 2 und der Schlauch 3 einzeln gefertigt und dann beispielsweise durch Kleben oder Schweissen fest und nicht trennbar verbunden werden (Fig. 3 - 6) oder mit einem kombinierten Hart-/Weich Spritzguss- oder Extrusionsverfah- ren, bei welchem der Verbund während der Herstellung erfolgt (Fig. 7, 8) .The embodiment of a tube-tube bed unit 1 shown in FIGS. 1A to 1D in bottom view, top view, top view and in cross section consists of a tube bed 2 produced by the injection molding process and one that is fixed and cannot be separated from the tube bed via a contact surface 4 in a squeeze area 5 2 connected hose 3. The hose-hose bed unit 1 has recesses 6, 6 'as fastening means, which are matched to corresponding cams as holding devices on the pump. Further features of this embodiment are handles 18, 18 'and extensions of the hose bed 2, which are designed as hose clamp areas 8, 8', and a labeling area 7. The labeling area 7 provides space for information about the pumped medium, the date of commissioning or others for Quality assurance and traceability important information. The main advantage of a hose bed 2 produced by the injection molding process is that its curvature can be optimally matched to the radius of a rotor. Furthermore, this type of manufacture allows a certain freedom in the design of fastening means, operating elements and surface structure of the hose-hose bed unit 1. The embodiment of the hose-hose bed unit 1 shown in FIGS. 2A to 2C in bottom view, top view and top view consists of one Band material produced hose bed 2 and a fixed via a contact surface 4 in the pinch area 5 and not separable with the Hose bed 2 connected hose 3. The hose-hose bed unit 1 has, for example, cutouts 6, 6 ′ as fastening means, which are matched to the corresponding holding devices on the pump. Further features of this embodiment are extensions of the hose bed 2, which are designed as hose clamp areas 8, 8 ', and a labeling area 7. The advantage of a hose bed 2 made of strip material consists primarily in the fact that specific lengths of the rotor are adapted for different rotor sizes Hose-hose bed unit 1 can also be produced inexpensively in small series. The strip material for the tubular bed 2 is preferably to be selected such that it has sufficient tensile strength in the longitudinal direction and at the same time the lowest possible bending tension when the rotor is wrapped around. The recesses 6, 6 ', which serve, for example, as fastening means, and the hose clamp regions 8, 8' of hose-hose bed units 1 made of strip material are preferably produced by stamping. FIGS. 3 to 9 show the cross sections of different embodiments of the hose-hose bed unit 1 in the pinch area 5. All variants have in common that firstly the hose bed 2 is fixedly and inseparably connected to the hose 3 at least in the pinch area 5 and secondly the material and / or the cross-section of the hose bed 2 are suitable for reducing the extensibility of the hose-hose bed unit 1 in the longitudinal direction in the squeeze area 5 such that it is less in comparison to the hose 3 alone. Analogously, all of the embodiments having these features also come within the scope of the invention, which result from the combination or modification of the embodiments shown in FIGS. 3 to 9. The hose-hose-bed unit 1 is preferably manufactured by manufacturing the hose-bed 2 and the hose 3 individually and then connecting them firmly and inseparably, for example by gluing or welding (FIGS. 3-6) or with a combined hard / soft injection molding - or extrusion process ren, in which the composite takes place during manufacture (Fig. 7, 8).
Fig. 3 zeigt den Querschnitt einer Ausführungsform der Schlauch-Schlauchbett-Einheit 1, bestehend aus einem bei- spielsweise konkav gekrümmten Schlauchbett 2 ' und einem Schlauch 3 mit tangentialer Kontaktfläche 4, welche mit dem Schlauchbett 2 beispielsweise verklebt oder verschweisst ist. Die konkave Krümmung von Schlauchbett 2 und Kontaktfläche 4 zentriert den Schlauch 3 in der Mitte des Schlauchbetts 2 und verhindert ein seitliches Abkippen beim Quetschvorgang. Ein Vorteil dieser Ausführungsform besteht weiter darin, dass die Kontaktfläche 4 aus demselben elastomeren Material besteht wie der Schlauch 3, diese wie eine Feder wirkt und dadurch Toleranzen im Quetschmass und in der Anpresskraft in einem gewissen Bereich ausgleichen kann.FIG. 3 shows the cross section of an embodiment of the hose-hose bed unit 1, consisting of, for example, a concavely curved hose bed 2 'and a hose 3 with a tangential contact surface 4, which is glued or welded to the hose bed 2, for example. The concave curvature of the hose bed 2 and the contact surface 4 centers the hose 3 in the middle of the hose bed 2 and prevents it from tipping sideways during the squeezing process. Another advantage of this embodiment is that the contact surface 4 consists of the same elastomeric material as the hose 3, which acts as a spring and can thus compensate for tolerances in the pinch dimension and in the contact pressure in a certain range.
Fig. 4 zeigt den Querschnitt einer Ausführungsform der Schlauch-Schlauchbett-Einheit 1, bei welcher eine Längsrippe 20 des Schlauchs 3 in eine entsprechende Aussparung des Schlauchbetts 2 geklebt oder mit diesem verschweisst ist. Fig. 5 zeigt den Querschnitt einer Ausführungsform der Schlauch-Schlauchbett-Einheit 1, bei welcher der Schlauch 3 innen und aussen eine nicht kreisrunde Querschnittsfläche aufweist. Es ist allen Ausführungsformen der Schlauch- Schlauchbett-Einheit 1 erfindungsgemäss gemeinsam, dass die feste, nicht trennbare Verbindung des Schlauchbetts 2 mit dem Schlauch 3 die Torsionslage des Schlauchs 3 in der Längsachse eindeutig bestimmt. Damit kann die Gestalt der Querschnittsfläche von Schlauch 3 innen und aussen grundsätzlich frei gewählt und beispielsweise für eine lange Lebensdauer oder für schonendes Pumpen optimiert werden.FIG. 4 shows the cross section of an embodiment of the hose-hose bed unit 1, in which a longitudinal rib 20 of the hose 3 is glued into a corresponding recess in the hose bed 2 or welded to it. FIG. 5 shows the cross section of an embodiment of the hose-hose bed unit 1, in which the hose 3 has a non-circular cross-sectional area inside and outside. According to the invention, it is common to all embodiments of the hose-hose bed unit 1 that the firm, inseparable connection of the hose bed 2 to the hose 3 uniquely determines the torsional position of the hose 3 in the longitudinal axis. In this way, the shape of the cross-sectional area of hose 3 inside and outside can in principle be chosen freely and optimized, for example, for a long service life or for gentle pumping.
Fig. 6 zeigt den Querschnitt einer Ausführungsform der Schlauch-Schlauchbett-Einheit, bei welcher das Schlauchbett 2 flexible Fortsätze 21, 21' als Aufnahme für den Schlauch 3 aufweist. Die Fortsätze 21, 21' werden dabei mit dem Schlauch 3 beispielsweise durch Kleben oder Schweissen fest und nicht trennbar verbunden. Diese Ausführungsform hat den Vorteil, dass bereits bestehende Schlauch-Meterware mit kreisrundem Innen- und Aussenquerschnitt verwendet werden kann. Fig. 7 zeigt den Querschnitt einer Ausführungsform der Schlauch-Schlauchbett-Einheit 1, bei welcher das Schlauchbett 2 und der Schlauch 3 als Hart-/Weich-Verbund koextrudiert sind. Die extrudierte Meterware wird geschnitten, das Schlauchbett 2 auf die notwendige Länge gekürzt und mit geeigneten Befestigungsmitteln versehen.FIG. 6 shows the cross section of an embodiment of the hose-hose bed unit, in which the hose bed 2 has flexible extensions 21, 21 'as a receptacle for the hose 3. The extensions 21, 21 'are connected to the hose 3, for example by gluing or welding, and are not separable. This embodiment has the advantage that existing tubular fabric with a circular inner and outer cross section can be used. FIG. 7 shows the cross section of an embodiment of the hose-hose bed unit 1, in which the hose bed 2 and the hose 3 are co-extruded as a hard / soft composite. The extruded piece goods are cut, the tubular bed 2 is shortened to the necessary length and provided with suitable fastening means.
Fig. 8 zeigt den Querschnitt einer Ausführungsform der Schlauch-Schlauchbett-Einheit 1, bei der das Schlauchbett 2 verstärkende Elemente 22 wie Folien, Bänder, Filamente oder Fasern enthält, die geeignet sind, die Dehnbarkeit der Schlauch-Schlauchbett-Einheit 1 in Längsrichtung so herabzusetzen, dass diese geringer ist im Vergleich zum Schlauch 3 alleine. Die Herstellung dieser Ausführungsform erfolgt vorzugsweise indem die verstärkenden Elemente 22 dem Schlauch- bett 2 während der Extrusion als Beilauf zugeführt werden. Die extrudierte Meterware wird geschnitten, das Schlauchbett 2 auf die notwendige Länge gekürzt und mit geeigneten Befestigungsmitteln versehen. Fig. 9 zeigt den Querschnitt einer Ausführungsform der Schlauch-Schlauchbett-Einheit 1, bei der das Schlauchbett 2 und der Schlauch 3 aus demselben Material bestehen und kein zusätzliches, verstärkendes Element 22 enthalten. Diese Ausführungsform erlaubt nur dann eine wesentliche Verringerung der Dehnbarkeit des Schlauchs 3 in Längsrichtung, wenn der Querschnitt des Schlauchbetts 2 grösser ist als der Materialquerschnitt des Schlauchs 3.8 shows the cross section of an embodiment of the hose-hose bed unit 1, in which the hose bed 2 contains reinforcing elements 22, such as foils, tapes, filaments or fibers, which are suitable for the extensibility of the hose-hose bed unit 1 in the longitudinal direction to reduce that this is lower compared to hose 3 alone. This embodiment is preferably produced by supplying the reinforcing elements 22 to the tubular bed 2 as a bypass during the extrusion. The extruded piece goods are cut, the tubular bed 2 is shortened to the necessary length and provided with suitable fastening means. FIG. 9 shows the cross section of an embodiment of the hose-hose bed unit 1, in which the hose bed 2 and the hose 3 are made of the same material and do not contain any additional, reinforcing element 22. This embodiment only allows a substantial reduction in the extensibility of the hose 3 in the longitudinal direction if the cross section of the hose bed 2 is larger than the material cross section of the hose 3.
Fig. 10 - 13 zeigen verschiedene Ausführungsformen von als Schlauchklemmenbereich 8 ausgebildeten Fortsätzen des Schlauchbetts 2 der Schlauch-Schlauchbett-Einheit 1. Allen Ausführungsformen gemeinsam sind zwei Schenkel 10, 10' die einen beispielsweise parallelen Schlitz 9 bilden, der mindestens so lang ist wie der halbe Umfang des Innenquerschnitts und weniger breit als die doppelte Wandstärke des grössten zu quetschenden Schlauchs 3. Fig. 10 A, B zeigt die bereits in Fig. 2 dargestellte Ausführungsform eines Schlauchklemmenbereichs 8 mit im Schlitz 9 eingeklemmten und abgequetschten Schlauch 3 in Obenansicht und Seitenansicht. Der Abstand zwischen den inneren Flanken der Schenkel 10, 10' des Schlauchklemmenbereichs 8 nimmt von aussen her kontinuierlich ab und geht in eine vorzugsweise konstante Breite des Schlitzes 9 über. Dies begünstigt eine einfache und mühelose Einführung des Schlauchs 3 von aussen her in den Schlitz 9, soweit bis der Schlauch 3 im gewünschten Ausmass gequetscht und der Durchfluss von Medium teilweise oder ganz unterbunden ist.10-13 show different embodiments of extensions of the hose bed 2 of the hose-hose bed unit 1 which are designed as a hose clamp region 8. All the embodiments have two legs 10, 10 'in common, which form a parallel slot 9, for example, which is at least as long as that half the circumference of the inner cross-section and less than twice the wall thickness of the largest hose 3 to be squeezed. FIG. 10 A, B shows the embodiment of a hose clamp region 8 already shown in FIG. 2 with a hose 3 clamped and squeezed in the slot 9 in top view and side view. The distance between the inner flanks the leg 10, 10 'of the hose clamp area 8 decreases continuously from the outside and merges into a preferably constant width of the slot 9. This favors a simple and effortless insertion of the hose 3 from the outside into the slot 9, to the extent that the hose 3 is squeezed to the desired extent and the flow of medium is partially or completely prevented.
Fig. 11 zeigt in Obenansicht eine geschlossene, arretierbare Ausführungsform eines Schlauchklemmenbereichs 8 mit einem Schenkel 10', der einen Fortsatz 11 aufweist, welcher in eine passende Öffnung am gegenüberliegenden Schenkel 10 greift, wodurch verhindert wird, dass sich die beiden Schenkel 10, 10' durch den Druck des eingeklemmten Schlauchs 3 mit der Zeit öffnen können. Eine arretierbare Ausführungsform ist insbesondere für harte Schlauchmaterialien geeignet oder wenn der Schlauch 3 über lange Zeit sicher abgequetscht bleiben muss. Der Schlauchklemmenbereich 8 wird geöffnet, indem einer der Schenkel 10, 10' aus der gemeinsamen Ebene bewegt wird, wodurch der Fortsatz 11 aus der Öffnung in Schenkel 10 springt.11 shows a top view of a closed, lockable embodiment of a hose clamp area 8 with a leg 10 'which has an extension 11 which engages in a suitable opening on the opposite leg 10, thereby preventing the two legs 10, 10' from can open over time by the pressure of the pinched hose 3. A lockable embodiment is particularly suitable for hard hose materials or if the hose 3 must remain securely squeezed off for a long time. The hose clamp area 8 is opened by moving one of the legs 10, 10 ′ out of the common plane, as a result of which the extension 11 jumps out of the opening in leg 10.
Fig. 12 zeigt in Obenansicht eine weitere geschlossene, arretierbare Ausführungsform eines Schlauchklemmenbereichs 8 mit zwei Schenkeln 10, 10', welche sich überlappend ineinander verschränken lassen, wodurch verhindert wird, dass sich die beiden Schenkel 10, 10' durch den Druck des eingeklemmten Schlauchs 3 mit der Zeit öffnen können.12 shows a top view of a further closed, lockable embodiment of a hose clamp area 8 with two legs 10, 10 ', which can be interlocked with one another, thereby preventing the two legs 10, 10' from being pressed together by the pressure of the clamped hose 3 can open with time.
Fig. 13 zeigt in Obenansicht eine weitere geschlossene, arretierbare Ausführungsform eines Schlauchklemmenbereichs 8, bei der die Schenkel 10, 10_' eine ineinandergreifende, selbstar- retierende Verzahnung 12 aufweisen. Die Breite des Schlitzes 9 lässt sich dabei durch Druck auf die Aussenseite der Schenkel 10, 10' solange stufenweise verringern, bis der Schlauch 3 im gewünschten Ausmass gequetscht und der Durchfluss von Medium teilweise oder ganz unterbunden ist. Der Schlauchklem- menbereich 8 wird geöffnet, indem einer der Schenkel 10, 10' aus der gemeinsamen Ebene bewegt wird, wodurch sich die Verzahnung 12 löst. Fig. 14 zeigt die aus Fig. 1 bekannte Schlauch-Schlauchbett- Einheit 1 mit einem im Spritzgussverfahren hergestellten Schlauchbett 2 zusammen mit Haltevorrichtungen 15, 15a und den Rollen 13 eines Rotors 14 als Quetschelementen in Drauf- sieht. Sinngemäss gelten die nachfolgenden Ausführungen auch für Schlauch-Schlauchbett-Einheiten 1 mit einem Schlauchbett 2 aus Bandmaterial gemäss Fig. 2.FIG. 13 shows a top view of a further closed, lockable embodiment of a hose clamp area 8, in which the legs 10, 10_ 'have an interlocking, self-locking toothing 12. The width of the slot 9 can be gradually reduced by pressing on the outside of the legs 10, 10 'until the hose 3 is squeezed to the desired extent and the flow of medium is partially or completely prevented. The hose clamp area 8 is opened by moving one of the legs 10, 10 'out of the common plane, as a result of which the toothing 12 is released. FIG. 14 shows the hose-hose bed unit 1 known from FIG. 1 with a hose bed 2 produced by the injection molding process together with holding devices 15, 15a and the rollers 13 of a rotor 14 as squeezing elements. The following explanations also apply mutatis mutandis to hose-hose bed units 1 with a hose bed 2 made of strip material according to FIG. 2.
Die Befestigung einer Schlauch-Schlauchbett-Einheit 1 gemäss Fig. 1 an der Pumpe erfolgt, indem auf beiden Seiten der Schlauch 3 in einen Schlitz 16 einer Haltevorrichtung 15, 15a eingelegt und der Druck auf die Schlauch-Schlauchbett-Einheit 1 über die Innenseite der Griffe 18 und 18' solange erhöht wird, bis Nocken 17 und 17a der Haltevorrichtung 15, 15a in die als Befestigungsmittel dienenden Aussparungen 6, 6' des Schlauchbetts 2 einrasten. Damit ist die Schlauch- Schlauchbett-Einheit 1 relativ zu den Rollen 13 in eindeutiger Position befestigt, wodurch sich eine definierte und reproduzierbare Anpresskraft auf den Schlauch 3 einstellt. Die Schlauch-Schlauchbett-Einheit 1 kann von der Pumpe getrennt werden, indem durch gleichzeitigen Druck auf die Aussenseite der Griffe 18 und 18', die als Befestigungsmittel dienenden Aussparungen 6, 6' des Schlauchbetts 2 von den Nocken 17, 17a der Haltevorrichtungen 15, 15a abgehoben werden, und dadurch die Verbindung der Schlauch-Schlauchbett-Einheit 1 zur Halte- Vorrichtung 15, 15a gelöst wird. Aus Fig. 14 geht hervor, dass die bevorzugte Ausführung der Haltevorrichtung 15, 15a die gleichzeitige Befestigung von zwei gegenüberliegenden Schlauch-Schlauchbett-Einheiten 1 und la erlaubt. Mit einer solchen Anordnung heben sich die von den Schlauch- Schlauchbett-Einheiten 1 und 1 a über die Schläuche 3 und 3a auf den Rotor 14 wirkenden Radialkräfte weitgehend auf, was die Verwendung kostengünstiger Lager für den Rotor 14 und die doppelte Anzahl Kanäle für eine bestimmte Bautiefe des Rotors 14 erlaubt. In Fig. 14 ist die Schlauch-Schlauchbett-Einheit la mit Aussparungen 19a, 19a' auf den Nocken 17', 17a' der Haltevorrichtung 15, 15a dargestellt. In dieser Position ist die Schlauch-Schlauchbett-Einheit la an der Pumpe befestigt, der Schlauch 3a ist jedoch vom Druck der Rollen 13 weitgehend entlastet. Mit dieser Einstellung lassen sich die elastomeren Eigenschaften des Schlauchs 3a bei längerem Stillstand der Pumpe erhalten, ohne dass die Schlauch-Schlauchbett-Einheit la ganz von der Pumpe getrennt werden muss. Es versteht sich von selbst, dass mit einer Schlauch-Schlauchbett-Einheit 1 welche mehrere, allenfalls feinere Aussparungen der Art 6, 6' und 19, 19-1 aufweist, die Anpresskraft stufenweise einstellbar wird. Damit kann beispielsweise die Anpresskraft der Schlauch-Schlauchbett-Einheit 1 auf die Quetschelemente entsprechend dem zu erzeugenden Druck eingestellt werden. Für den Gedanken der Erfindung ist es dabei unerheblich, ob die Mittel für eine abgestufte oder stufenlose Einstellung der Anpresskraft an der Schlauch-Schlauchbett-Einheit 1 oder an der Haltevorrichtung an der Pumpe angebracht sind, wie auch ob diese direkt oder indire'kt über Hebel, Keile, Schrauben oder andere Stellelemente wirken.1 is attached to the pump by inserting the hose 3 on both sides into a slot 16 of a holding device 15, 15a and the pressure on the hose-bed unit 1 via the inside of the pump Handles 18 and 18 'are raised until cams 17 and 17a of the holding device 15, 15a snap into the recesses 6, 6' of the hose bed 2 which serve as fastening means. The hose-hose bed unit 1 is thus fastened in a clear position relative to the rollers 13, as a result of which a defined and reproducible pressing force is set on the hose 3. The hose-hose bed unit 1 can be separated from the pump by simultaneously pressing the outside of the handles 18 and 18 ', the recesses 6, 6' of the hose bed 2 serving as fastening means from the cams 17, 17a of the holding devices 15, 15a are lifted off, and thereby the connection of the hose-hose bed unit 1 to the holding device 15, 15a is released. 14 shows that the preferred embodiment of the holding device 15, 15a allows the simultaneous fastening of two opposite hose-hose-bed units 1 and 1a. With such an arrangement, the radial forces acting on the hose 14 from the hose-hose-bed units 1 and 1a via the hoses 3 and 3a largely cancel each other out, which means the use of inexpensive bearings for the rotor 14 and twice the number of channels for a specific one Construction depth of the rotor 14 allowed. 14 shows the hose-hose bed unit 1 a with recesses 19 a, 19 a ′ on the cams 17 ′, 17 a ′ of the holding device 15, 15 a. In this position, the hose-hose bed unit la is attached to the pump Hose 3a is largely relieved of the pressure of the rollers 13. With this setting, the elastomeric properties of the hose 3a can be maintained when the pump is at a standstill for a long time without the hose-hose-bed unit la having to be completely separated from the pump. It goes without saying that with a hose-hose bed unit 1 which has a plurality of, possibly finer, recesses of the types 6, 6 'and 19, 19 -1 , the contact pressure can be adjusted in stages. For example, the contact pressure of the hose-hose-bed unit 1 on the squeeze elements can be adjusted in accordance with the pressure to be generated. For the concept of the invention, it is irrelevant whether the means for a graded or infinite adjustment of the contact pressure on the hose-hose unit 1 or on the holding device on the pump are attached, as well as whether these are directly or indirectly via levers , Wedges, screws or other control elements work.
Fig. 15 zeigt die Haltevorrichtung 15 in Seitenansicht. Fig. 16 zeigt die bereits von Fig. 1 bekannte Schlauch- Schlauchbett-Einheit 1 mit einer gefedert ausgeführten Haltevorrichtung 15, 15a und den Rollen 13 eines Rotors 14 als Quetschelemente in Draufsicht. Federn 23, 23a weisen Nocken 24, 24a auf, welche auf die Aussparungen 6, 6' des Schlauchbetts 2 abgestimmt sind. Die Feder 23a setzt die Schlauch- Schlauchbett-Einheit 1 unter eine bestimmte Zugspannung, die eine entsprechende Anpresskraft der Schlauch-Schlauchbett- Einheit 1 an die Rollen 13 des Rotors 14 bewirkt. Die Haltevorrichtung 15, 15a kann dabei ein- oder beidseitig Federn aufweisen, welche für unterschiedliche Anpresskraft auch aus- tauschbar ausgeführt sein können. Wie bereits in Fig. 14 ist die Schlauch-Schlauchbett-Einheit la auch hier 'vo Anpressdruck entlastet dargestellt, indem der Nocken 24 der Feder 23 in die Aussparung 19a und der Nocken 17a' der Haltevorrichtung 15a in die Aussparung 19a' greift. Mit einer gefedert ausgeführten Haltevorrichtung 15a kann beispielsweise der im Schlauch 3 auftretende Druck sicher begrenzt werden. Sobald der Innendruck einen bestimmten Wert übersteigt kann die von der Feder 23a bestimmte, vom Schlauchbett 2 auf den Schlauch 3 wirkende Anpresskraft auf die Quetschelemente das Schlauch- Lumen nicht mehr vollständig schliessen, wodurch ein Rück- fluss stattfindet und die Pumpwirkung entsprechend nachlässt. Es versteht sich von selbst, dass es für den Gedanken der Er- findung unerheblich ist, ob das federnde Element als Teil der Haltevorrichtung 15a oder als Teil der Schlauch-Schlauchbett- Einheit 1 ausgeführt ist oder über weitere Elemente indirekt auf die Schlauch-Schlauchbett-Einheit 1 wirkt. Als Einwegartikel besteht jede neue Schlauch-Schlauchbett- Einheit 1 jeweils nicht nur aus einem neuen Schlauch 3 sondern immer auch aus einem neuen Schlauchbett 2. Dadurch sind unabhängig von der Ausführungsform immer reproduzierbare Ausgangsbedingungen sichergestellt. Obschon die Schlauch-Schlauchbett-Einheit 1 hier vorzugsweise in Zusammenhang mit Pumpen beschrieben wird, die einen Rotor und Rollen als Quetschelemente aufweisen, ist sie nicht an eine bestimmte Art, Ausführung oder Dimension von Quetschelementen gebunden und kann beispielsweise auch mit Finger- oder Stössel-Pumpen eingesetzt werden. Auch versteht es sich von selbst, dass als Mittel für eine lösbare Befestigung der Schlauch-Schlauchbett-Einheit 1 an der Pumpe eine Vielzahl von geometrischen Formen wie beispielsweise Ösen, Höcker, Rillen, Fortsätze oder Aussparungen verschiedener Anzahl und Kombination mit darauf abgestimmten Elementen an der Pumpe wie beispielsweise Haken, Bolzen, Schnallen oder Klemmen der Anforderung entsprechend gewählt werden können und auch Schlauch-Schlauchbett-Einheiten 1 mit anderen als den hier genannten oder zusätzlichen, indirekten Befestigungsmitteln wie beispielsweise Klammern oder Kassetten unter den Gedanken der Erfindung fallen. Bei genügend festem und steifem Schlauchbett, genügt beispielsweise eine einzige Haltevorrichtung um die Schlauch-Schlauchbett-Einheit 1 auf die Quetschelemente zu pressen. Ausführungen von Peristaltikpumpen, bei welchen die Schlauch-Schlauchbett-Einheit 1 mit einer oder mehr als zwei Haltevorrichtungen verbunden sind, sind damit ebenfalls erfindungsgemäss . 15 shows the holding device 15 in a side view. FIG. 16 shows the hose-hose-bed unit 1 already known from FIG. 1 with a spring-mounted holding device 15, 15a and the rollers 13 of a rotor 14 as squeezing elements in a top view. Springs 23, 23a have cams 24, 24a which are matched to the cutouts 6, 6 'of the tubular bed 2. The spring 23a sets the hose-hose-bed unit 1 under a certain tension, which causes a corresponding contact pressure of the hose-hose-bed unit 1 against the rollers 13 of the rotor 14. The holding device 15, 15a can have springs on one or both sides, which can also be designed to be exchangeable for different pressing forces. As already in FIG. 14, the hose-hose bed unit 1 a is shown here also relieved of contact pressure by the cam 24 of the spring 23 engaging in the recess 19 a and the cam 17 a ′ of the holding device 15 a in the recess 19 a ′. With a spring-mounted holding device 15a, for example, the pressure occurring in the hose 3 can be reliably limited. As soon as the internal pressure exceeds a certain value, that determined by the spring 23a, from the tubular bed 2 to the tube 3 The contact pressure acting on the squeeze elements no longer completely closes the tube lumen, as a result of which a backflow takes place and the pumping action decreases accordingly. It goes without saying that it is irrelevant to the idea of the invention whether the resilient element is designed as part of the holding device 15a or as part of the hose-hose bed unit 1 or indirectly via further elements on the hose-hose bed unit. Unit 1 works. As a disposable item, each new hose-and-bed unit 1 does not only consist of a new hose 3 but also always of a new hose bed 2. This ensures that reproducible starting conditions are always ensured, regardless of the embodiment. Although the hose-hose-bed unit 1 is preferably described here in connection with pumps which have a rotor and rollers as squeeze elements, it is not tied to a specific type, design or dimension of squeeze elements and can also be used, for example, with fingers or plungers. Pumps are used. It also goes without saying that a multitude of geometric shapes such as eyelets, humps, grooves, extensions or recesses of various numbers and combinations with elements matched to them as a means for releasably attaching the hose-tube bed unit 1 to the pump Pump such as hooks, bolts, buckles or clamps can be selected according to the requirement and hose-hose-bed units 1 with other than the mentioned or additional, indirect fastening means such as clamps or cassettes fall under the concept of the invention. With a sufficiently firm and rigid tubular bed, for example, a single holding device is sufficient to press the tubular-tubular bed unit 1 onto the squeeze elements. Designs of peristaltic pumps in which the hose-hose bed unit 1 are connected to one or more than two holding devices are thus also in accordance with the invention.

Claims

Patentansprüc e Patent claims
1. Peristaltikpumpe1. Peristaltic pump
- mit mindestens einem Schlauchbett (2), - mit mindestens einem Schlauch (3) ,- with at least one hose bed (2), - with at least one hose (3),
- mit mindestens einem Quetschelement, welches über den Schlauch (3) geführt werden kann und diesen in einem Quetschbereich (5) gegen das Schlauchbett (2) quetscht, - mit mindestens einer Haltevorrichtung (15) zur Befestigung des Schlauchbettes (2) bezüglich des mindestens einen Quetschelementes, dadurch gekennzeichnet, dass- With at least one squeezing element, which can be guided over the hose (3) and squeezes it in a squeezing area (5) against the hose bed (2), - With at least one holding device (15) for fastening the hose bed (2) with respect to the at least one a squeezing element, characterized in that
Schlauchbett (2) und Schlauch (3) im Quetschbereich (5) fest und nicht trennbar miteinander verbunden sind und zusammen eine Schlauch-Schlauchbett-Einheit (1) bildenThe hose bed (2) and hose (3) in the squeeze area (5) are firmly and inseparably connected to one another and together form a hose-hose bed unit (1)
- mindestens ein geeignetes Mittel (6) vorhanden ist, welches eine lösbare Befestigung dieser Schlauch- Schlauchbett-Einheit (1) an der mindestens einen Haltevorrichtung (15) ermöglicht.- At least one suitable means (6) is present, which enables a detachable attachment of this hose-hose bed unit (1) to the at least one holding device (15).
2. Peristaltikpumpe nach Patentanspruch 1, dadurch gekennzeichnet, dass das Schlauchbett (2) der Schlauch- Schlauchbett-Einheit (1) eine geringere Dehnbarkeit aufweist als der Schlauch (3) .2. Peristaltic pump according to claim 1, characterized in that the tube bed (2) of the tube-tube bed unit (1) has a lower extensibility than the tube (3).
3. Peristaltikpumpe nach Patentanspruch 1 oder 2, dadurch gekennzeichnet, dass die Schlauch-Schlauchbett-Einheit (1) mindestens einen als Griff (18) ausgebildeten Bereich aufweist für die Bedienung des mindestens einen Mittels (6) .3. Peristaltic pump according to claim 1 or 2, characterized in that the tube-tube bed unit (1) has at least one area designed as a handle (18) for operating the at least one means (6).
4. Peristaltikpumpe nach einem der Patentansprüche 1 bis 3, dadurch gekennzeichnet, dass die Schlauch-Schlauchbett- Einheit (1) mindestens einen Schlauchklemmenbereich (8) aufweist. 4. Peristaltic pump according to one of the claims 1 to 3, characterized in that the hose-hose bed unit (1) has at least one hose clamp area (8).
5. Peristaltikpumpe nach Patentanspruch 4, dadurch gekennzeichnet, dass der mindestens eine Schlauchklemmenbereich (8) der Schlauch-Schlauchbett-Einheit (1) als Spalt aus- geführt ist.5. Peristaltic pump according to claim 4, characterized in that the at least one hose clamp area (8) of the hose-hose unit (1) is designed as a gap.
6. Peristaltikpumpe nach einem der Patentansprüche 1 bis 5, dadurch gekennzeichnet, dass das mindestens eine Mittel (6) zur Befestigung der Schlauch-Schlauchbett-Einheit (1) an der mindestens einen Haltevorrichtung (15) durch wenigstens einen als Aussparung, Öse, Nocken, Höcker oder Zahn ausgebildeten Bereich oder Fortsatz des Schlauchbetts (2) gebildet wird.6. Peristaltic pump according to one of the claims 1 to 5, characterized in that the at least one means (6) for fastening the hose-hose unit (1) to the at least one holding device (15) by at least one as a recess, eyelet, cam , Hump or tooth-formed area or extension of the tubular bed (2) is formed.
7. Peristaltikpumpe nach einem der Patentansprüche 1 bis 5, dadurch gekennzeichnet, dass das mindestens eine Mittel (6) zur Befestigung der Schlauch-Schlauchbett-Einheit (1) an der mindestens einen Haltevorrichtung (15) als Klammer, Halterung oder Kassette ausgebildet ist.7. Peristaltic pump according to one of the claims 1 to 5, characterized in that the at least one means (6) for fastening the hose-tube bed unit (1) to the at least one holding device (15) is designed as a clip, holder or cassette.
8. Peristaltikpumpe nach einem der Patentansprüche 1 bis 7, dadurch gekennzeichnet, dass das mindestens eine Mittel (6) zur Befestigung der Schlauch-Schlauchbett-Einheit (1) an der mindestens einen Haltevorrichtung (15) so ausge- bildet ist, dass die Anpresskraft der Schlauch- Schlauchbett-Einheit (1) an das mindestens eine Quetschelement einstellbar ist.8. Peristaltic pump according to one of the claims 1 to 7, characterized in that the at least one means (6) for fastening the hose-hose bed unit (1) to the at least one holding device (15) is designed such that the contact pressure the hose-hose bed unit (1) to which at least one squeeze element can be adjusted.
9. Peristaltikpumpe nach einem der Patentansprüche 1 bis 8, dadurch gekennzeichnet, dass das mindestens eine Mittel9. Peristaltic pump according to one of claims 1 to 8, characterized in that the at least one agent
(6) zur Befestigung der Schlauch-Schlauchbett-Einheit (1) an der mindestens einen Haltevorrichtung (15) mindestens ein gefedertes Element (23) enthält, welches eine seiner Federkraft entsprechende Anpresskraft der Schlauch- Schlauchbett-Einheit (1) an das mindestens eine Quetschelement bewirkt. (6) for fastening the hose-hose-bed unit (1) to the at least one holding device (15) contains at least one spring-loaded element (23) which, according to its spring force, presses the hose-hose-bed unit (1) onto the at least one Squeezing element causes.
10. Peristaltikpumpe nach einem der Patentansprüche 1 bis 9, dadurch gekennzeichnet, dass die feste, nicht trennbare Verbindung von Schlauchbett (2) und Schlauch (3) in der Schlauch-Schlauchbett-Einheit (1) durch Kleben, Schwei- ssen, Spritzgiessen oder Extrudieren erzeugt wird.10. Peristaltic pump according to one of the claims 1 to 9, characterized in that the fixed, non-separable connection of the tube bed (2) and tube (3) in the tube-tube bed unit (1) by gluing, welding, injection molding or Extrude is generated.
11. Peristaltikpumpe nach Patentanspruch 10, dadurch gekennzeichnet, dass Schlauchbett (2) und Schlauch (3) der Schlauch-Schlauchbett-Einheit (1) mittels Zweikomponen- ten-Spritzgiessen hergestellt sind.11. Peristaltic pump according to claim 10, characterized in that the hose bed (2) and hose (3) of the hose-hose bed unit (1) are produced by means of two-component injection molding.
12. Peristaltikpumpe nach Patentanspruch 10, dadurch gekennzeichnet, dass Schlauchbett (2) und Schlauch (3) der Schlauch-Schlauchbett-Einheit (1) mittels Koextrudieren hergestellt sind. 12. Peristaltic pump according to claim 10, characterized in that the tube bed (2) and tube (3) of the tube-tube bed unit (1) are produced by means of coextrusion.
EP04734653A 2003-06-06 2004-05-25 Peristaltic pump Expired - Lifetime EP1664535B1 (en)

Applications Claiming Priority (2)

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CH9882003 2003-06-06
PCT/CH2004/000317 WO2004109109A1 (en) 2003-06-06 2004-05-25 Peristaltic pump

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ATE502213T1 (en) 2011-04-15
WO2004109109A1 (en) 2004-12-16
DE502004012312D1 (en) 2011-04-28

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