US20130052063A1 - Tube accommodation of a roller pump - Google Patents

Tube accommodation of a roller pump Download PDF

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Publication number
US20130052063A1
US20130052063A1 US13/593,921 US201213593921A US2013052063A1 US 20130052063 A1 US20130052063 A1 US 20130052063A1 US 201213593921 A US201213593921 A US 201213593921A US 2013052063 A1 US2013052063 A1 US 2013052063A1
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US
United States
Prior art keywords
tube
pump
pump head
lever mechanism
accommodation chamber
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.)
Abandoned
Application number
US13/593,921
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English (en)
Inventor
Erik SCHOENEWERK
Rolf SCHNEKENBURGER
Juergen Schneider
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Aesculap AG
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Aesculap AG
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Filing date
Publication date
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Assigned to AESCULAP AG reassignment AESCULAP AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SCHNEKENBURGER, ROLF, SCHNEIDER, JUERGEN, SCHOENEWERK, ERIK
Publication of US20130052063A1 publication Critical patent/US20130052063A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • 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
    • F04B43/1261—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 the rollers being placed at the outside of the tubular flexible member
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/14212—Pumping with an aspiration and an expulsion action
    • A61M5/14232—Roller pumps
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/10—Location thereof with respect to the patient's body
    • A61M60/104—Extracorporeal pumps, i.e. the blood being pumped outside the patient's body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/20—Type thereof
    • A61M60/247—Positive displacement blood pumps
    • A61M60/253—Positive displacement blood pumps including a displacement member directly acting on the blood
    • A61M60/268—Positive displacement blood pumps including a displacement member directly acting on the blood the displacement member being flexible, e.g. membranes, diaphragms or bladders
    • A61M60/279—Peristaltic pumps, e.g. roller pumps
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/40—Details relating to driving
    • A61M60/424—Details relating to driving for positive displacement blood pumps
    • A61M60/438—Details relating to driving for positive displacement blood pumps the force acting on the blood contacting member being mechanical
    • A61M60/441—Details relating to driving for positive displacement blood pumps the force acting on the blood contacting member being mechanical generated by an electromotor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/50—Details relating to control
    • A61M60/585—User interfaces
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/80—Constructional details other than related to driving
    • A61M60/845—Constructional details other than related to driving of extracorporeal blood pumps
    • A61M60/849—Disposable parts
    • 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
    • F04B43/1284—Means for pushing the backing-plate against the tubular flexible member

Definitions

  • the present disclosure relates to a peristaltic pump and in particular to a tensioning device arranged in or at a tube accommodation chamber of a peristaltic or roller pump for impacting tension to a tube adapted to be inserted in the duct, preferably of disposable construction.
  • Roller or peristaltic (squeezing) pumps are displacement pumps in which the medium to be pumped is pressed through a tube by a flexible outer mechanical deformation thereof. Due to the gentle advancement of the medium (without it being sheared or distorted), peristaltic pumps are especially also used for medical purposes.
  • a flexibly/elastically deformable tube is on principle inserted such that it is guided around a rotatable pump head along a predetermined circumferential section on which a number of rollers spaced apart at angles are rotatably mounted, said rollers being, with an appropriate rotation of the pump head, sequentially brought into rolling engagement with the tube and compress/clamp same.
  • the tube either supports itself at the outer surface of the pump casing or is tensioned around and against the pump head with a predetermined tensile force.
  • the movement of the pump head results in that the respective clamping position of a roller that is being in engagement moves forward along the tube and thus advances the pumping medium inside the tube section immediately in front of the corresponding roller.
  • the generation of a suction underpressure in the tube section immediately following the corresponding roller is, as a rule, effected by the inherent elasticity of the tube material due to which the tube attempts to recover its original shape of construction.
  • the pump head is a rather complex component consisting of a plurality of individual parts movable/rotating relative to each other (as was already indicated before), which in fact would not have to be changed since it is not contaminated directly by the pumping medium. It is therefore substantially more cost-efficient to provide only the tube as a disposable. For changing the tube, however, it has to be drawn off the pump head or fitted on it again, respectively, wherein a pre-tensioning force by which the tube is tensioned around the pump head has to be overcome. To facilitate the changing of merely the tube (with the pump head remaining), a specific tensioning mechanism has therefore been developed by means of which it is possible to release and tension the tube for a changing process.
  • a catching beam as a tube accommodation which is, at the two axial ends thereof, fixedly connected with the tube at two axially spaced-apart tube sections such that the tube (tube middle section) forms a loop between the beam ends.
  • the beam and the tube thus form a separate, exchangeable tube unit.
  • the tube formed this way is now placed/guided with its loop area around the pump head, and the catching beam is latched into a tensioning device.
  • the tensioning device preferably provides a guide rail/guide groove for the catching beam along which the catching beam is displaced while the loop area is tensioned until the catching beam latches into a detachable holder/latch in the tube accommodation chamber.
  • a peristaltic pump which has increased functionality. It is desirable to facilitate the inserting process for a tube or a tube unit especially of disposable construction. It is also desirable to improve the safety of the peristaltic pump. Finally, it is desirable to keep the peristaltic pump, and in particular the exchange tube unit, cost-efficient.
  • Peristaltic pumps in accordance with this invention may include a tube accommodation chamber in which the tube may be inserted while it is almost untensioned.
  • the peristaltic pump may include a tube tensioning device with a lever mechanism adapted to be operated preferably by hand or by electric motor so as to tension the tube along a predetermined circumferential section around the rotating pump head of the peristaltic pump.
  • the lever mechanism enables the operating force required for reaching the necessary tensioning force and hence the pressure force against the pump head to be reduced, so that is can simply be exerted by hand without additional separate tools being required.
  • the drive may be of small dimension and hence cost-efficient.
  • a plurality of constructional designs are conceivable as a lever mechanism, by which an operating movement is transferrable with an appropriate reduction to the tube/the tube unit, such as, for instance, a worm gear, a lifting block, a gear mechanism, or similar auxiliary means.
  • the lever mechanism in particular in the case of manual operation, conventionally in the form of an operating element (operating handle) hingedly mounted to the peristaltic pump and coupled (operatively connected) with a displaceable component or plunger component transferring thrust, which transfers an operating force generated at the operating handle by pivoting as a function of the kind/place of coupling in a reduced manner to the tube.
  • Such a concept for the lever mechanism is easy to manufacture, fail-safe and hence economic.
  • a medical peristaltic pump comprising a pump casing in which a tube accommodation chamber is formed or accommodated in which a pump head is rotatably mounted, and a tube unit inserted in the tube accommodation chamber such that a tube of the tube unit is engaged or is adapted to be engaged with the pump head in a manner to encompass same at least partially.
  • the tensioning force with which the tube touches or is to touch the pump head is exerted by a tensioning device arranged at the pump casing (i.e. provided as a fixed component of the peristaltic pump), said tensioning device cooperating with the tube unit in order that during its (manual/motor) operation the tube is tensioned around the pump head.
  • the tensioning device is a lever mechanism fixedly mounted to the pump casing and hence not to be considered as a tool.
  • a lever element of the lever mechanism simultaneously also comprises a protective cap for at least partially covering the tube accommodation chamber.
  • the tube accommodation chamber is simultaneously opened and/or closed (automatically), and hence the movable parts positioned therein, such as the pump head, are protected toward the outside. This increases the safety of the peristaltic pump.
  • the protective cap either forms or is fixed to that lever element that is provided as an operating handle of the lever mechanism, or forms or is fixed to that lever element (plunger element) that is adapted to be operated via the operating handle for the transfer of forces.
  • the lever mechanism according to the invention comprises an operating element or an operating handle that is directly or indirectly hingedly mounted to the pump casing, and a plunger element that is operatively connected with the lever for a transfer of forces.
  • the protective cap may accordingly be assigned either to the operating handle or to the plunger element.
  • the operating handle simultaneously comprises or is the protective cap, it may have the shape of a cover plate.
  • the force transferring lever element comprises or is the protective cap
  • the operating handle may have the shape of a bow-shaped handle, a buckle/operating button, a toggle lever, or a similar ergonomic shape. Since the protective function and the operating function are accordingly assigned to different elements of the lever mechanism, it is possible to adapt their constructions optimally to their remaining functions without any compromise.
  • a tube accommodation (hook component) that is arranged or adapted to be arranged either fixedly or displaceable in or at the tube accommodation chamber, and into which the tube is adapted to be inserted or is inserted/hooked via a tube holder formed or fixed thereon.
  • the lever mechanism acts on the now displaceable pump head to press it against a free tube middle section positioning itself in the fixed tube accommodation.
  • the lever mechanism acts on the tube accommodation preferably as a further element of the lever mechanism to move it relative to the now stationary (not displaceable) pump head such that a free tube middle section positioning itself in the tube accommodation touches the pump head in a manner encompassing same.
  • the tube middle section may be straight or may already be looped.
  • the lever mechanism is designed to be self-locking, i.e. if the operating handle, when operated, swivels across a kind of dead center for tensioning the tube and then folds/snaps quasi automatically to its final tensioning position.
  • This final tensioning position may be supported by a slight lock-in position for tactile feedback.
  • a tube unit for a peristaltic pump in accordance with the invention (separately of the peristaltic pump according to the invention), consisting of a tube holder (engagement device) holding the flexible, preferably elastic tube at two axially spaced-apart positions, or being fixedly connected with the tube at these positions, respectively, and thus forming at least one undercut adapted to be brought in holding engagement with the tube accommodation of the peristaltic pump or the lever mechanism.
  • a medical peristaltic pump comprising:
  • a tensioning device in the form of a lever mechanism which is fixedly mounted (that means not provided for exchange) at the pump casing or at the tube accommodation chamber, said lever mechanism comprising at least one lever element (preferably the operating element) as a (front side) protective cap for at least partially (at the front side) covering/closing the tube accommodation chamber, and cooperating with the tube holder for the displacement thereof so as to pre-tension the tube around the pump head when operated.
  • FIG. 1 shows a first embodiment of the invention with a manually operable lever mechanism as a tensioning device with a stationary tube accommodation and a bow-shaped operating handle in the open (untensioned) and closed (tensioned) conditions;
  • FIG. 2 shows a second embodiment of the invention with a manually operable lever mechanism as a tensioning device with a stationary tube accommodation and a buckle-shaped operating handle in the open (untensioned) and closed (tensioned) conditions;
  • FIG. 3 shows a third embodiment of the invention with a manually operable lever mechanism as a tensioning device with a stationary tube accommodation and a plate-shaped operating handle in the open (untensioned) and closed (tensioned) conditions;
  • FIG. 4 shows a fourth embodiment of the invention with a manually operable lever mechanism as a tensioning device with a stationary tube accommodation and a toggle lever-shaped operating handle in the open (untensioned) and closed (tensioned) conditions;
  • FIG. 5 shows a fifth embodiment of the invention with a manually operable lever mechanism as a tensioning device with a displaceable/movable tube accommodation and a button-shaped operating handle in the open and closed conditions;
  • FIG. 6 shows a sixth preferred embodiment of the invention with a manually operable lever mechanism as a tensioning device with a displaceable/movable tube accommodation and a plate-shaped operating handle in the open (untensioned) and closed (tensioned) conditions;
  • FIG. 7 shows a seventh embodiment of the invention with a lever mechanism operable by an electric motor as a tensioning device with a displaceable/movable tube accommodation and a gear mechanism as a lever mechanism between the drive motor and the tube accommodation in the open (untensioned) and closed (tensioned) conditions; and
  • FIG. 8 shows the casing of a peristaltic pump according to one embodiment of the invention with a bow-shaped operating handle pursuant to FIG. 1 and in particular the tube accommodation chamber in the open (untensioned) condition.
  • FIG. 1 shows in detail a tube accommodation chamber 1 of a peristaltic pump pursuant to FIG. 8 , comprising a tensioning device with a lever mechanism 2 .
  • the peristaltic pump of the invention basically comprises a pump casing 4 at the front side of which the tube accommodation chamber 1 is arranged such that it opens toward the front side of the pump casing 4 .
  • a pump head 6 consisting of a motor-driven, rotatable drive wheel at the radial outer circumference of which a number of pressure wheels/rollers (not illustrated) are mounted to rotate relatively and are distributed at regular circumferential intervals to each other.
  • a control panel 8 that is also placed at the front side of the pump casing 4 serves to program a control at least for the electric drive of the pump head so as to set, for instance, the torque or the turn-on and turn-off times of the peristaltic pump. Moreover, turn-on and turn-off buttons are arranged at the front side of the pump casing.
  • the tube accommodation chamber 1 is designed in the form of a substantially rectangular shell or depression that is either manufactured integrally with the pump casing 4 or inserted as a separate component in a corresponding section of the pump casing 4 .
  • respective indentations 12 are formed which serve as tube accommodations and in which a tube or a tube unit 14 may be inserted.
  • the indentations 12 are flush with each other such that their alignment is arranged to be radially displaced to the pump head 6 .
  • the tensioning device with the lever mechanism 2 is mounted on the pump casing 4 .
  • This lever mechanism consists in the instant case of an operating handle 16 in the form of a grip that is hingedly mounted on the pump casing 4 and that is operatively connected with a shifting element (plunger component) 18 via a (not illustrated) joint, spring means, or a gear mechanism.
  • the shifting element 18 has, in the plan view pursuant to FIG. 1 , a substantially rectangular plate shape with a dimension that suffices to cover the tube accommodation chamber 1 largely or even completely.
  • the shifting element 18 is further connected with the axis of rotation of the pump head 6 and forms in the instant case a bearing for the axis of rotation.
  • the shifting element 18 may, for instance, consist of two plates that are spaced apart in parallel, that are fixed to each other, and that hold the pump head between them in a rotatable manner. In this case it is also of advantage if the (not illustrated) drive motor for the pump head 6 is also fastened to the shifting element 18 .
  • the shifting element 18 is guided to be displaced at the pump casing 4 such that it cannot be lifted off the pump casing 4 .
  • the mounting of the pump head 6 is further chosen such that the pump head 6 projects over the shifting element 18 at the plate edge of the shifting element 18 which faces the alignment.
  • FIG. 1 also illustrates the tube unit 14 that is, in accordance with the invention, provided as a component separate of the peristaltic pump and can optionally be inserted in the tube accommodation chamber 1 .
  • the tube unit 14 accordingly consists of a flexible, preferably elastically deformable tube 20 at which two holders or engaging elements 22 are fastened or designed at axial distance to each other. These holders 22 form radial circumference projections or collars that are adapted to be brought into undercut engagement with the indentations 12 at the tube accommodation chamber 1 .
  • the axial distance of the holders 22 is chosen such that, if the tube 20 is inserted in the two indentations 12 , so that the holders 22 touch the tube accommodation chamber 1 behind the indentations 12 , the tube middle section 20 a extending therebetween is not or just slightly tensioned, so that it substantially follows the alignment.
  • the tube accommodation chamber 1 is partially covered with a fixed plate 24 , wherein the fixed plate 24 comprises an inner bulge 24 a into which that part of the pump head 6 that projects from the plate-shaped shifting element 18 in the direction of the alignment immerses or moves in, respectively, when the tube accommodation chamber 1 is closed.
  • FIG. 1 and FIG. 8 The functioning of the peristaltic pump according to the first preferred embodiment of the invention can be described by means of FIG. 1 and FIG. 8 as follows.
  • the tube accommodation chamber 1 is opened in that the bow-shaped operating handle 16 according to FIG. 1 is folded manually to the left, so that the plate-shaped shifting element 18 along with the pump head 6 is displaced via the lever mechanism to the left, i.e. away from the alignment.
  • this (open, untensioned) position it is now possible to insert the tube unit 14 in the indentations in accordance with the foregoing description without the exertion of force and hence easily.
  • the bow-shaped operating handle 16 is folded manually in the direction of the alignment, wherein this folding or swiveling movement is transferred via the lever mechanism with an appropriate reduction to the plate-shaped shifting element 18 for the displacement thereof. That means, by swiveling the operating handle 16 in the direction of the alignment, the plate-shaped shifting element 18 is pushed forward in the direction of the fixed plate 24 , wherein the pump head 6 that is rotatably mounted thereon is simultaneously pressed against the tube middle section 20 a and pushed forward.
  • the pump head 6 Since the movement distance of the shifting element 18 until it abuts on the fixed plate 24 is larger than the distance between the inserted tube 20 and the pump head 6 in the completely open condition, the pump head 6 is consequently quasi pressed through the tube 20 , wherein the tube middle section 20 a is tensioned between the holders 22 /indentations 12 around the pump head 6 along a partial circumference thereof.
  • the tube middle section 20 a In the completely closed condition of the tube accommodation chamber 1 in accordance with the left illustration in FIG. 1 , the tube middle section 20 a is accordingly elastically deformed in U-shape, so that a predetermined touching force results between the pump head 6 and the tube 20 .
  • the lever mechanism In the process of the swiveling movement of the operating handle 16 in the closing or tensioning direction, respectively, it exceeds a kind of dead center of the lever mechanism, whereupon the operating handle 16 , utilizing the tensioning force of the tube middle section 20 a which has already been generated, is urged on the pump head 6 in the direction of the tensioned final position of the operating handle (pursuant to the left illustration in FIG. 1 ). That means, the lever mechanism according to the first embodiment of the invention is equipped with a kind of self-locking that keeps the operating handling 16 automatically, without additional locking elements, in the tensioned final position.
  • FIGS. 2 and 3 illustrate alternative embodiments of the tensioning device 2 pursuant to FIG. 1 , wherein merely the technical differences as compared to the first embodiment are to be dealt with in the following while all the other technical features substantially correspond to the first embodiment.
  • FIGS. 2 and 3 differ from the first embodiment pursuant to FIG. 1 in the design of the manually operable operating handle 16 .
  • the operating handle 16 is designed as a strip-shaped buckle whereas the plate-shaped shifting element 18 pursuant to the right illustration in FIG. 2 is designed at its upper side with a longitudinal groove 26 in shifting direction of the shifting element 18 which is facing the buckle 16 .
  • the fixed plate 24 is also provided with a corresponding longitudinal groove 28 that is flush with the longitudinal groove 26 in the shifting element 18 .
  • the longitudinal groove(s) 24 , 26 is (are) dimensioned such that the buckle 16 during folding in the tensioned final position pursuant to the left illustration in FIG. 2 swivels into the groove(s) 24 , 26 and is accommodated therein almost completely.
  • a substantially smooth, edge-free upper side of the plate-shaped shifting element 18 and of the fixed plate 24 results, so that an inadvertent opening of the buckle 16 , for instance, due to getting caught, is safely avoided. This contributes to the further improvement of the safety of the peristaltic pump according to the invention.
  • the operating handle 16 pursuant to the right illustration in FIG. 3 may also consist of a plate-shaped flap that covers, after the folding in the tensioned final position (see left illustration in FIG. 3 ), the tube accommodation chamber 1 , preferably along with the fixed plate 24 , completely.
  • the embodiment according to FIG. 4 basically corresponds to the afore-described embodiments, but in this case the operating handle 16 is designed in the form of a toggle lever.
  • the toggle lever 16 is hinged at the tube accommodation chamber 1 or at the pump casing 4 such that its swivel axis extends perpendicular to the front side of the pump casing 4 and hence perpendicular to the upper side of the plate-shaped shifting element 18 .
  • the toggle lever 16 is designed with an eccentric or a cam 16 a pressing against the thrust element 18 on rotation of the lever 16 and displacing same in closing direction against the inserted tube 20 .
  • toggle lever 16 Since the toggle lever 16 is not coupled with the shifting element 18 , but only touches one back edge 18 a thereof, a spring (means) that is not illustrated is provided in the instant case, said spring (means) pre-tensioning the shifting element 18 in opening direction (untensioned final position pursuant to the right illustration in FIG. 4 ).
  • the toggle lever 16 is also positioned such that on reaching its tensioned final position (see left illustration in FIG. 4 ) it has exceeded an (upper) dead center of the cam 16 a and is thus kept automatically in this position.
  • FIG. 5 accordingly shows a fifth embodiment of the invention as a simple construction for implementing the afore-mentioned alternative tensioning principle.
  • the pump head 6 is, pursuant to FIG. 5 , left illustration, rotatably mounted (stationary) in the tube accommodation chamber 1 and is driven by a motor that is not illustrated in the pump casing 4 .
  • the tube accommodation chamber 1 is guided in a semi-circle around the pump head 6 , so that a kind of U-shaped accommodation duct or groove 1 a is formed between the tube accommodation chamber 1 and the pump head 6 .
  • a beam-shaped accommodation 30 is mounted in the tube accommodation chamber 1 such that the beam 30 that is oriented substantially tangentially to the pump head 6 is displaceable in the transverse direction thereof.
  • a longitudinal slit 32 extending in the displacement direction of the beam 30 is formed in the tube accommodation chamber 1 , through which a lever-shaped operating handle 16 extends which has the shape of a button at its free projecting end. At its other, invisible end the operating handle 16 is pivotally mounted in the pump casing 4 .
  • the lever-shaped operating handle 16 comprises a catching element that is not illustrated and that is in operative engagement with the beam-shaped accommodation 30 so as to transform a swiveling movement of the operating handle 16 with an appropriate reduction of the lever mechanism generated thereby to a displacing movement of the beam 30 .
  • the tube unit 14 also comprises two axially spaced-apart collar-shaped holders 22 that are adapted to be brought into undercut engagement with indentations 12 in the displaceable beam-shaped accommodation 30 .
  • the axial distance between the two holders 22 along the tube 20 is so large that the tube middle section 20 a bulges to a U-shaped loop between the holders 22 when the holders 22 or the tube 20 , respectively, are/is placed/inserted in the beam-shaped tube accommodation 30 at the indentations 12 thereof.
  • the loop has a middle radius corresponding approximately to the U-shaped accommodation duct is around the pump head 6 , so that the tube middle section 20 a may be placed around the pump head 6 in the untensioned condition almost without any effort.
  • the operating handle 16 is operated, i.e. in the instant case swiveled away from the pump head 6 , and thus the beam-shaped accommodation 30 is moved away from the pump head 6 .
  • the tube middle section 20 a touches the partial circumference of the pump head 6 with a predefined tensioning force, as is illustrated in the right illustration in FIG. 5 .
  • the operating handle 16 pursuant to the fifth preferred embodiment of the invention is dimensioned such that it exceeds, shortly prior to reaching its tensioned final position (see right illustration in FIG. 5 ), a dead center whereupon the tensioning force of the tube 20 holds the operating handle 16 in this tensioned final position.
  • the fifth embodiment of the invention pursuant to FIG. 5 has a relatively simple mechanical construction since the pump head 6 can be kept stationary and merely the (preferably beam-shaped) accommodation 30 has to be displaceable relative to the pump head 6 .
  • this construction can be manufactured in a cost-efficient manner.
  • the rotating parts are exposed even in the tensioned final position of the operating handle 16 .
  • the sixth embodiment of the invention pursuant to the left illustration in FIG. 6 provides a modified operating handle 16 as compared to the fifth preferred embodiment.
  • the afore-described button is replaced by a plate-shaped flap that is hinged to the pump housing 4 by means of a hinge that is not illustrated, and that is operatively connected with the beam-shaped accommodation 30 via a kind of plunger component 34 .
  • the plunger component may in the instant case consist of a bar frame that is hinged at a particular middle position to the pivotable flap 16 and to the accommodation 30 for achieving a lever effect.
  • the plunger component 34 may comprise two push rods that are displaceably mounted laterally at the tube accommodation chamber 1 and that are coupled with the operating handle 16 via a lever or gear mechanism so as to transform a swiveling movement of the operating handle 16 to a pushing movement of the push rods.
  • the functioning of the tube accommodation chamber 1 and in particular of the tensioning device with a lever mechanism 2 pursuant to the sixth embodiment of the invention is substantially the same as with the fifth embodiment.
  • the tensioning device 2 provided with a self-locking as was already described before by means of the fifth embodiment.
  • the operating handle/operating element need not necessarily be operated manually, but can also be operated by a motor.
  • a motor may basically be used with all embodiments that have already been described, for instance, so as to apply an operating force on the operating handle/operating element via a gear mechanism or a piston.
  • the use of a motor drive also enables a modification of the tensioning device, as will be described in the following by means of the seventh preferred embodiment pursuant to FIG. 7 , middle illustration.
  • the cover plate 16 comprises an accommodation for the tube unit 14 consisting of two spaced-apart indentations 12 that are flush with each other and into which the tube unit 14 is adapted to be inserted in an undercut manner by means of holders/engaging elements 22 fixed thereto (see right illustration in FIG. 7 ).
  • the distance between the two holders 22 is chosen such that the tube 20 in the inserted, but still untensioned condition substantially follows the alignment between the indentations 12 .
  • the drive is formed by an electric motor that is not illustrated and that is operatively connected with the cover plate 16 via a lever mechanism consisting of an eccentric/cam and a plunger component.
  • a lever mechanism consisting of an eccentric/cam and a plunger component.
  • other constructions for a lever mechanism such as, for instance, a gear mechanism, are, however, also conceivable.
  • the motor By activating the motor, a pushing force is exerted via the lever mechanism on the cover plate 16 , so that it moves from an open final position pursuant to the middle illustration in FIG. 7 in the direction of the pump head 6 .
  • the tube 20 touches the pump head 6 and is, during the further movement, tensioned around the pump head 6 until the tensioned final position of the cover plate 16 .
  • the self-locking effect is either produced by the motor or the downstream lever mechanism.
  • the present invention relates to a peristaltic pump for medical purposes, comprising a pump casing in which a tube accommodation chamber is formed in which a pump head is rotatably mounted, and a tube unit adapted to be inserted in the tube accommodation chamber such that a tube of the tube unit is engaged with the pump head in a manner to encompass same at least partially.
  • a tensioning device is arranged at the pump casing which cooperates with the tube unit so as to tension the tube around the pump head on operation thereof.
  • the tensioning device comprises a lever mechanism, wherein a lever element of the lever mechanism preferably simultaneously forms or comprises a protective cap for the at least partially covering of the tube accommodation.

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Mechanical Engineering (AREA)
  • Public Health (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Cardiology (AREA)
  • General Engineering & Computer Science (AREA)
  • Vascular Medicine (AREA)
  • Human Computer Interaction (AREA)
  • Reciprocating Pumps (AREA)
US13/593,921 2011-08-29 2012-08-24 Tube accommodation of a roller pump Abandoned US20130052063A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011081722.0 2011-08-29
DE102011081722A DE102011081722A1 (de) 2011-08-29 2011-08-29 Schlauchaufnahme einer Rollerpumpe

Publications (1)

Publication Number Publication Date
US20130052063A1 true US20130052063A1 (en) 2013-02-28

Family

ID=46785236

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/593,921 Abandoned US20130052063A1 (en) 2011-08-29 2012-08-24 Tube accommodation of a roller pump

Country Status (5)

Country Link
US (1) US20130052063A1 (fr)
EP (1) EP2565453B1 (fr)
JP (1) JP6182303B2 (fr)
DE (1) DE102011081722A1 (fr)
ES (1) ES2611339T3 (fr)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
US20210170163A1 (en) * 2017-11-08 2021-06-10 Oina Vv Ab Peristaltic pump
US11204340B2 (en) 2018-09-21 2021-12-21 Rosemount Inc. Forced convection heater

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109331242B (zh) * 2018-09-28 2021-04-27 滨州医学院附属医院 全自动医用引流装置
CN114156582B (zh) * 2021-11-26 2022-09-13 湖南大学 一种集快速散热与加热于一体的轻质铝塑混合电池包结构

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JP4660847B2 (ja) * 2004-08-20 2011-03-30 株式会社メテク ローラポンプ
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US4925376A (en) * 1987-06-26 1990-05-15 Tek-Aids, Inc. Peristaltic pump with tube holding mechanism
US5096393A (en) * 1989-08-28 1992-03-17 Csir Peristaltic pump with hinged rotor support housing and adjustable tube rack
US6406267B1 (en) * 2000-06-16 2002-06-18 Claude F. Mondiere Extracorporeal circulation pump
US20050069436A1 (en) * 2003-09-29 2005-03-31 Japan Servo Co., Ltd. Tube pump
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210170163A1 (en) * 2017-11-08 2021-06-10 Oina Vv Ab Peristaltic pump
US11692540B2 (en) * 2017-11-08 2023-07-04 Oina Vv Ab Peristaltic pump
US11204340B2 (en) 2018-09-21 2021-12-21 Rosemount Inc. Forced convection heater

Also Published As

Publication number Publication date
ES2611339T3 (es) 2017-05-08
DE102011081722A1 (de) 2013-02-28
JP2013050106A (ja) 2013-03-14
EP2565453B1 (fr) 2016-11-16
JP6182303B2 (ja) 2017-08-16
EP2565453A1 (fr) 2013-03-06

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