WO2004109109A1 - Peristaltic pump - Google Patents
Peristaltic pump Download PDFInfo
- Publication number
- WO2004109109A1 WO2004109109A1 PCT/CH2004/000317 CH2004000317W WO2004109109A1 WO 2004109109 A1 WO2004109109 A1 WO 2004109109A1 CH 2004000317 W CH2004000317 W CH 2004000317W WO 2004109109 A1 WO2004109109 A1 WO 2004109109A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hose
- tube
- bed
- bed unit
- peristaltic pump
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
- F04B43/1253—Machines, 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/0009—Special features
- F04B43/0054—Special features particularities of the flexible members
- F04B43/0072—Special 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
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/557,930 US20060177329A1 (en) | 2003-06-06 | 2004-05-25 | Peristaltic pump |
AT04734653T ATE502213T1 (en) | 2003-06-06 | 2004-05-25 | PERISTALTIC PUMP |
EP04734653A EP1664535B1 (en) | 2003-06-06 | 2004-05-25 | Peristaltic pump |
DE502004012312T DE502004012312D1 (en) | 2003-06-06 | 2004-05-25 | PERISTALTIC |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH988/03 | 2003-06-06 | ||
CH9882003 | 2003-06-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004109109A1 true WO2004109109A1 (en) | 2004-12-16 |
Family
ID=33494587
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CH2004/000317 WO2004109109A1 (en) | 2003-06-06 | 2004-05-25 | Peristaltic pump |
Country Status (5)
Country | Link |
---|---|
US (1) | US20060177329A1 (en) |
EP (1) | EP1664535B1 (en) |
AT (1) | ATE502213T1 (en) |
DE (1) | DE502004012312D1 (en) |
WO (1) | WO2004109109A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009058279A1 (en) * | 2009-12-11 | 2011-06-16 | W.O.M. World Of Medicine Ag | Peristaltic peristaltic pump |
EP2621556A4 (en) * | 2010-10-01 | 2018-04-04 | Zevex, Inc. | Method for improving accuracy in a peristaltic pump system based on tubing material properties |
EP4166786A1 (en) * | 2021-10-18 | 2023-04-19 | Lrp Ag | Peristaltic pump |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK2462348T3 (en) | 2009-07-14 | 2019-03-18 | Sanofi Aventis Deutschland | PUMP ROOMS FOR A PERISTAL PUMP |
WO2012112920A1 (en) | 2011-02-19 | 2012-08-23 | Shipman Douglas | Improved pump, method of operation, and method of manufacture |
GB201421964D0 (en) * | 2014-12-10 | 2015-01-21 | Hodges & Drake Design Ltd | Peristaltic pumps |
US20180340530A1 (en) * | 2017-05-24 | 2018-11-29 | Clayton Vowels | Multi-tubular peristaltic pump apparatus and methods of making and using the same |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1013172B (en) * | 1952-12-15 | 1957-08-01 | Herwarth Reich Dipl Ing | pump |
FR2394695A2 (en) * | 1977-06-17 | 1979-01-12 | Sermem Sa | Peristaltic pump with sealed action - has stepped profile roller acting on centring formation of body formed from flat profiled element and sealed between two jaws |
US4494285A (en) * | 1982-08-16 | 1985-01-22 | Windsor Medical, Inc. | Method of making a member defining a lumen for a peristaltic pump and member produced by said method |
US4544329A (en) * | 1983-01-14 | 1985-10-01 | Windsor Medical, Inc. | Peristaltic pump having a spiral cam and straight peristaltic tube |
WO1995011383A1 (en) * | 1993-10-19 | 1995-04-27 | Allan Richard Jones | Peristaltic pump tube |
Family Cites Families (20)
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US3176672A (en) * | 1961-11-02 | 1965-04-06 | Gen Motors Corp | Low oil pressure sensitive engine governor |
US4482347A (en) * | 1982-08-12 | 1984-11-13 | American Hospital Supply Corporation | Peristaltic fluid-pumping apparatus |
US4650469A (en) * | 1984-10-19 | 1987-03-17 | Deltec Systems, Inc. | Drug delivery system |
US4932837A (en) * | 1988-10-21 | 1990-06-12 | Rymal Ted R | Centrifugal pump for liquids |
US5342181A (en) * | 1992-06-15 | 1994-08-30 | Datascope Investment Corp. | Single roller blood pump and pump/oxygenator system using same |
US5626563A (en) * | 1993-01-12 | 1997-05-06 | Minnesota Mining And Manufacturing Company | Irrigation system with tubing cassette |
US6074183A (en) * | 1995-02-09 | 2000-06-13 | First Medical, Inc. | Peristaltic system and method for plasma separation and blood dispensation |
US5620312A (en) * | 1995-03-06 | 1997-04-15 | Sabratek Corporation | Infusion pump with dual-latching mechanism |
US5759017A (en) * | 1996-01-31 | 1998-06-02 | Medtronic Electromedics, Inc. | Peristaltic pump and tube loading system |
US5840069A (en) * | 1996-04-04 | 1998-11-24 | Medtronic, Inc. | Implantable peristaltic pump techniques |
US6036459A (en) * | 1996-04-04 | 2000-03-14 | Medtronic, Inc. | Occlusion compensator for implantable peristaltic pump |
US5846061A (en) * | 1996-11-08 | 1998-12-08 | Board Of Trustees Of Michigan State University | Peristaltic metering pump |
US6099272A (en) * | 1997-09-18 | 2000-08-08 | Fsi International | Peristaltic pump with flow control |
US6554791B1 (en) * | 1999-09-29 | 2003-04-29 | Smisson-Cartledge Biomedical, Llc | Rapid infusion system |
US6296459B1 (en) * | 2000-02-15 | 2001-10-02 | Intex Recreation Corp. | Electric air pump having multiple impellers and method |
US6494693B1 (en) * | 2000-10-23 | 2002-12-17 | Cole-Parmer Instrument Company | Peristatic pump |
US6506035B1 (en) * | 2001-03-20 | 2003-01-14 | Zevex, Inc. | Roller for peristaltic pumps having a plurality of projections to minimize current draw |
US6491368B1 (en) * | 2001-12-03 | 2002-12-10 | Xerox Corporation | Priming system for multicolor ink jet printers |
CA2513550A1 (en) * | 2003-01-24 | 2004-08-12 | Tecumseh Products Company | Brushless and sensorless dc motor control system with locked and stopped rotor detection |
JP2005188407A (en) * | 2003-12-25 | 2005-07-14 | Toyota Industries Corp | Heat insulation structure in piston type compressor |
-
2004
- 2004-05-25 EP EP04734653A patent/EP1664535B1/en not_active Expired - Lifetime
- 2004-05-25 US US10/557,930 patent/US20060177329A1/en not_active Abandoned
- 2004-05-25 AT AT04734653T patent/ATE502213T1/en active
- 2004-05-25 WO PCT/CH2004/000317 patent/WO2004109109A1/en active Application Filing
- 2004-05-25 DE DE502004012312T patent/DE502004012312D1/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1013172B (en) * | 1952-12-15 | 1957-08-01 | Herwarth Reich Dipl Ing | pump |
FR2394695A2 (en) * | 1977-06-17 | 1979-01-12 | Sermem Sa | Peristaltic pump with sealed action - has stepped profile roller acting on centring formation of body formed from flat profiled element and sealed between two jaws |
US4494285A (en) * | 1982-08-16 | 1985-01-22 | Windsor Medical, Inc. | Method of making a member defining a lumen for a peristaltic pump and member produced by said method |
US4544329A (en) * | 1983-01-14 | 1985-10-01 | Windsor Medical, Inc. | Peristaltic pump having a spiral cam and straight peristaltic tube |
WO1995011383A1 (en) * | 1993-10-19 | 1995-04-27 | Allan Richard Jones | Peristaltic pump tube |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009058279A1 (en) * | 2009-12-11 | 2011-06-16 | W.O.M. World Of Medicine Ag | Peristaltic peristaltic pump |
DE102009058279B4 (en) * | 2009-12-11 | 2016-05-12 | W. O. M. World of Medicine GmbH | Peristaltic peristaltic pump |
EP2621556A4 (en) * | 2010-10-01 | 2018-04-04 | Zevex, Inc. | Method for improving accuracy in a peristaltic pump system based on tubing material properties |
EP4166786A1 (en) * | 2021-10-18 | 2023-04-19 | Lrp Ag | Peristaltic pump |
Also Published As
Publication number | Publication date |
---|---|
EP1664535B1 (en) | 2011-03-16 |
US20060177329A1 (en) | 2006-08-10 |
DE502004012312D1 (en) | 2011-04-28 |
EP1664535A1 (en) | 2006-06-07 |
ATE502213T1 (en) | 2011-04-15 |
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