NO971147L - Infusion pump as a hose pump - Google Patents
Infusion pump as a hose pumpInfo
- Publication number
- NO971147L NO971147L NO971147A NO971147A NO971147L NO 971147 L NO971147 L NO 971147L NO 971147 A NO971147 A NO 971147A NO 971147 A NO971147 A NO 971147A NO 971147 L NO971147 L NO 971147L
- Authority
- NO
- Norway
- Prior art keywords
- hose
- pump
- pusher
- slopes
- infusion
- Prior art date
Links
- 238000001802 infusion Methods 0.000 title claims description 18
- 239000003978 infusion fluid Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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
- F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
- F04B43/082—Machines, pumps, or pumping installations having flexible working members having tubular flexible members the tubular flexible member being pressed against a wall by a number of elements, each having an alternating movement in a direction perpendicular to the axes of the tubular member and each having its own driving mechanism
-
- 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
-
- 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
- A61M5/14228—Pumping with an aspiration and an expulsion action with linear peristaltic action, i.e. comprising at least three pressurising members or a helical member
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Vascular Medicine (AREA)
- Anesthesiology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Description
Foreliggende oppfinnelse angår en infusjonspumpe som slangepumpe, med en slange og flere pumpeskyvere som sammenklemmer slangen etter hverandre og syklisk. The present invention relates to an infusion pump as a hose pump, with a hose and several pump pushers which clamp the hose one after the other and cyclically.
En infusjonspumpe av denne typen er kjent fra DE 4035182 C1. Denne infusjonspumpen oppviser mange pumpeskyvere, som hver drives av en kamaksel og trykker slangen mot et mothold. Driften av pumpeskyverne skjer på den måten at slangen sammenklemmes fortløpende, slik at den væsken som den inneholder drives peristaltisk i transportretningen. Slike slangepumper betegnes også som finger-pumper, idet de enkelte pumpeskyvere danner fingre. An infusion pump of this type is known from DE 4035182 C1. This infusion pump features many pump pushers, each of which is driven by a camshaft and presses the tubing against a counter-hold. The operation of the pump pushers takes place in such a way that the hose is continuously compressed, so that the liquid it contains is driven peristaltically in the direction of transport. Such hose pumps are also referred to as finger pumps, as the individual pump pushers form fingers.
Det har vist seg at slangepumpene ved lang driftstid har en betydelig transportfeil. Derfor kan slangepumpene ikke benyttes når det stilles strenge betingelser til transportraten. It has been shown that the hose pumps have a significant transport error during long periods of operation. Therefore, the hose pumps cannot be used when strict conditions are imposed on the transport rate.
En infusjonspumpe som angis i innledningen til patentkrav 1 er kjent fra DE 2939212 C1. I denne infusjonspumpen er det anordnet en lineært bevegelig pumpeskyver som styres av en kamaksel og som vekselvis flatklemmer slangen og beveges tilbake. Pumpeskyveren styrer en tilbakeformingsinnretning som består av to bakker, og bakkene virker sideveis mot slangen. Tilbakeformingsinnretningen styres i hele lengden av syklusen i motfase til pumpeskyveren. Når pumpeskyveren har kommet til sin fremre endestilling befinner tilbakeformingsinnretningen seg i åpningsstillingen, der den muliggjør flatklemning av slangen. Når pumpeskyveren derimot har kommet til sin maksimale tilbakeføringsstilling, inntar tilbakeformingsinnretningen en lukkestilling, der den sammenklemmer slangen slik at slangen fullstendig lukkes. Bare i den halve lengden av bevegelsesvinkelen til pumpeskyveren inntar pumpeskyveren og tilbakeformingsinnretningen en stilling der slangen kan innta sin normal tverrsnittsform. Ved denne typen drift sammenklemmes slangen fullstendig, vekselvis i to retninger i rett vinkel med hverandre. Den utsettes i hver fase av pumpesyklusen for ytre deformasjonskrefter. Ettersom det i en slangepumpe er anordnet mange pumpeskyvere med forholdsvis små avstander mellom hverandre og alle pumpeskyverne befinner seg i forskjellige faser av pumpesyklusen, inntreffer den såkalte tetraeffekten, ved hvilken slangen samtidig tvangsdeformeres på forskjellig måte i forskjellige lengdepartier. Dette kan føre til utmatting av slangematerialet. An infusion pump as stated in the preamble to patent claim 1 is known from DE 2939212 C1. In this infusion pump, a linearly movable pump pusher is arranged which is controlled by a camshaft and which alternately flattens the hose and moves back. The pump pusher controls a back-forming device consisting of two slopes, and the slopes act laterally towards the hose. The reshaping device is controlled for the entire length of the cycle in counterphase to the pump pusher. When the pump pusher has reached its forward end position, the return forming device is in the open position, where it enables the hose to be clamped flat. However, when the pump pusher has reached its maximum return position, the return forming device assumes a closed position, where it clamps the hose so that the hose is completely closed. Only in half the length of the angle of movement of the pump pusher does the pump pusher and the back-forming device assume a position where the hose can assume its normal cross-sectional shape. In this type of operation, the hose is completely compressed, alternately in two directions at right angles to each other. It is exposed in each phase of the pump cycle to external deformation forces. As many pump pushers are arranged in a hose pump with relatively small distances between each other and all the pump pushers are in different phases of the pump cycle, the so-called tetra effect occurs, whereby the hose is simultaneously forcibly deformed in different ways in different length sections. This can lead to fatigue of the hose material.
I den eldre patentsøknad WO 96/18038 (internasjonal publiseringsdato: 13. juni 1996) er det beskrevet en slangepumpe, i hvilken det likeledes er anordnet en tilbakeformingsinnretning bestående av to bakker. Ved maksimalt tilbaketrukne pumpeskyvere kommer bakkene i tilbakeformingsinnretningen til anlegg mot slangen og bringer denne til det opprinnelige tverrsnitt. Ved den etterfølgende forover-bevegelsen av pumpeskyverne fjerner bakkene seg fra slangen. I denne slangepumpen rager bakkene i tilbakeformingsinnretningen sideveis forbi kamakselen og utenfor kamakselen. In the older patent application WO 96/18038 (international publication date: 13 June 1996) a hose pump is described, in which a re-forming device consisting of two trays is likewise arranged. When the pump pushers are maximally retracted, the slopes in the re-forming device come into contact with the hose and bring it to the original cross-section. The subsequent forward movement of the pump pushers removes the slopes from the hose. In this hose pump, the slopes in the back-forming device project laterally past the camshaft and outside the camshaft.
Et formål med oppfinnelsen er å komme frem til en infusjonspumpe i form av en slangepumpe eller fingerpumpe som har en mere konstant transport og som bare belaster slangen i liten grad. One purpose of the invention is to arrive at an infusion pump in the form of a hose pump or finger pump which has a more constant transport and which only puts a small strain on the hose.
Løsningen av denne oppgaven skjer i henhold til oppfinnelsen med de trekk som angis i patentkrav 1. The solution to this task takes place according to the invention with the features stated in patent claim 1.
I infusjonspumpen i henhold til oppfinnelsen er det anordnet en tilbakeformingsinnretning som påvirker slangen, og som ved tilbaketrukket pumpeskyver tilbakeformer slangen på tvers av bevegelsesretningen til pumpeskyveren. Ved hjelp av tilbakeformingsinnretningen utnyttes de normale avspenningsegenskaper til slangen, og slangen bringes hurtigere og nøyaktigere tilbake til sin opprinnelige form. Dermed elimineres tendenser til utmatting i slangematerialet. Tilbakeformingsinnretningen bevirker at slangen ved den neste påvirkning fra pumpeskyveren befinner seg i sin opprinnelige tilstand og oppviser det maksimale slangetverrsnitt. Tilbakeformingsinnretningen forhindrer "flatskvising" av infusjonsslangen ved lengere infusjonstider. Den styres i henhold til stillingen til den tilhørende pumpeskyveren. Fortrinnsvis er det til hver pumpeskyver anordnet en tilhørende tilbakeformingsinnretning. Det kan imidlertid være tilstrekkelig at f.eks. hver annen pumpeskyver er tilordnet en tilbakeformingsinnretning. In the infusion pump according to the invention, a reshaping device is arranged which affects the hose, and which, when the pump pusher is retracted, reshapes the hose across the direction of movement of the pump pusher. With the help of the reshaping device, the normal relaxation properties of the hose are utilized, and the hose is returned to its original shape more quickly and accurately. This eliminates the tendency to fatigue in the hose material. The re-shaping device causes the hose to be in its original state at the next impact from the pump pusher and exhibits the maximum hose cross-section. The re-shaping device prevents "flattening" of the infusion tube during longer infusion times. It is controlled according to the position of the associated pump slide. Preferably, each pump pusher is provided with an associated back-forming device. However, it may be sufficient that e.g. every other pump pusher is assigned to a feedback device.
Oppfinnelsen er basert på den erkjennelsen at den store unøyaktigheten i transportraten for slangepumper kan tilbakeføres til de dårlige avspenningsforhold for slangen, som etter hver slagbevegelse av pumpeskyveren ikke inntar sin opprinnelige form men bare en mellomliggende form, ved hvilken slangetverrsnittet er minsket. Ved hjelp av tilbakeformingsinnretningen sikres at etter hver slagbevegelse av pumpeskyveren inntar slangetverrsnittet sin opprinnelige form. Slangen tilbakeformes ved tilbaketrukket pumpeskyver bare inntil det oppnås den opprinnelige tverrsnittsformen, og flatklemmes ikke av tilbakeformingsinnretningen. Dessuten kommer tilbakeformings innretningen bare til anlegg mot slangen når denne er frigitt av pumpeskyveren. Det skjer således ingen tvangsdeformasjon av slangen, slik at denne i løpet av pumpesyklusen fasevist har mulighet til å innstilles seg fritt. Bare ved fullstendig frem-skjøvet pumpeskyver og i lukkestillingen til tilbakeformingsinnretningen skjer en tvangsutøvelse mot slangen. Begge tvangsutøvelser er vekselvise. Dette betyr at enten bare pumpeskyveren eller bare tilbakeformingsinnretningen påvirker slangen, mens begge ikke påvirker slangen i noe tidspunkt. The invention is based on the recognition that the great inaccuracy in the transport rate for hose pumps can be attributed to the poor relaxation conditions for the hose, which after each impact movement of the pump pusher does not assume its original shape but only an intermediate shape, whereby the hose cross-section is reduced. With the help of the reshaping device, it is ensured that after each impact movement of the pump pusher, the hose cross-section assumes its original shape. The hose is reshaped by withdrawn pump pushers only until the original cross-sectional shape is achieved, and is not pinched flat by the reshaping device. In addition, the return forming device only comes into contact with the hose when this is released by the pump pusher. There is thus no forced deformation of the hose, so that during the pumping cycle it has the opportunity to adjust freely in phases. Only when the pump pusher is fully pushed forward and in the closed position of the back-forming device does a forced action take place against the hose. Both compulsory exercises are alternate. This means that either only the pump pusher or only the backformer affects the hose, while both do not affect the hose at any time.
I en foretrukket utførelsesform av oppfinnelsen oppviser tilbakeformingsinnretningen to mot hverandre bevegelige bakker, med mot hverandre vendende arbeidsflater som er tilpasset slangeomkretsen til slangen. Ved utskifting eller regulering av bakkene muliggjøres en tilpasning til forskjellige slangediametere. In a preferred embodiment of the invention, the reshaping device has two mutually movable trays, with opposite working surfaces which are adapted to the hose circumference of the hose. By replacing or adjusting the slopes, an adaptation to different hose diameters is possible.
I det følgende skal utførelseseksempler av oppfinnelsen forklares nærmere, med henvisning til tegningene. In the following, embodiments of the invention will be explained in more detail, with reference to the drawings.
Figur 1 viser et lengdesnitt gjennom en del av slangepumpen i et første Figure 1 shows a longitudinal section through part of the hose pump in a first
utførelseseksempel.execution example.
Figur 2 viser skjematisk et tverrsnitt etter linjen ll-ll i fig. 1.Figure 2 schematically shows a cross-section along the line ll-ll in fig. 1.
Figur 3 viser tilsvarende som fig. 2 tilstanden ved tilbaketrukket pumpeskyver. Figur 4 viser et tverrsnitt gjennom et andre utførelseseksempel ved åpen tilbake formingsinnretning. Figur 5 viser tilsvarende som fig. 4 den lukkede tilbakeformingsinnretningen. Figure 3 shows the same as fig. 2 the condition when the pump impellers are retracted. Figure 4 shows a cross-section through a second design example with an open back forming device. Figure 5 shows the same as fig. 4 the closed feedback device.
Slangepumpen 10 vist i fig. 1 oppviser en fleksibel slange 11, som f.eks. består av PVC og har sirkelrundet tverrsnitt i opprinnelig tilstand. Slangen 11 er en engangs-artikkel, som benyttes for engangsbruk i infusjonspumpen og deretter erstattes av en annen slange. Slangen 11 tilkobles et væskeforråd, f.eks. en infusjonsvæske-beholder, for i løpet av lengere tid, f.eks. 24 timer, å tilføre en infusjonsløsning til en pasient med mest mulig konstant infusjonsrate. The hose pump 10 shown in fig. 1 shows a flexible hose 11, which e.g. consists of PVC and has a circular cross-section in its original condition. The hose 11 is a disposable article, which is used for single use in the infusion pump and is then replaced by another hose. The hose 11 is connected to a liquid supply, e.g. an infusion fluid container, for over a longer period of time, e.g. 24 hours, to supply an infusion solution to a patient with as constant an infusion rate as possible.
Infusjonspumpen 10 inneholder flere parallelle pumpeskyvere 12, med hoder 13 som via en fleksibel membran 14 virker mot slangen 11, slik at denne enten inntar sin opprinnelige form eller sammenklemmes. Membranen 14 kan utelates. En (ikke vist) drivmotor driver en kamaksel 1 5 som er lagret i pumpehuset og oppviser flere kam-skiver 16. Hver av kamskivene 16 driver en pumpeskyver 12. Pumpeskyverne 12 styres lengdeforskyvbart i sideveise spor i pumpehuset, og forløper på tvers av lengderetningen til slangen 11. Kamskivene 16 er slik anordnet at pumpeskyverne 12 forskyves forover og trekkes tilbake syklisk og etter hverandre, slik at slangen 11 langs sin lengde deformeres omtrent sinusformet og avgrenser transportvolum VF som flytter seg i transportretningen. På den siden som er motsatt av pumpeskyverne 12 understøttes slangen ved hjelp av en trykkplate 17. The infusion pump 10 contains several parallel pump pushers 12, with heads 13 which via a flexible membrane 14 act against the hose 11, so that it either assumes its original shape or is pinched. The membrane 14 can be omitted. A drive motor (not shown) drives a camshaft 15 which is stored in the pump housing and has several cam discs 16. Each of the cam discs 16 drives a pump pusher 12. The pump pushers 12 are longitudinally displaceable controlled in lateral grooves in the pump housing, and extend across the longitudinal direction of the hose 11. The cam discs 16 are arranged in such a way that the pump pushers 12 are moved forward and retracted cyclically and one after the other, so that the hose 11 along its length is deformed approximately sinusoidally and delimits the transport volume VF which moves in the direction of transport. On the side opposite the pump pushers 12, the hose is supported by means of a pressure plate 17.
I fig. 2 og 3 er en av pumpeskyverne 12 vist i sin pumpestilling (fig. 2) og i tilbaketrukket stilling (fig. 3). Den tilhørende kamskiven 16, som befinner seg på kamakselen 15, befinner seg i et langstrakt hull 18 i pumpeskyveren 12 og beveger pumpeskyveren 12 på tvers av slangen i forskyvningsretningen, for å sammenklemme slangen, og deretter i tilbakeføringsretningen for å fjernes fra slangen. In fig. 2 and 3, one of the pump pushers 12 is shown in its pump position (fig. 2) and in the retracted position (fig. 3). The associated cam 16, which is located on the camshaft 15, is located in an elongated hole 18 in the pump pusher 12 and moves the pump pusher 12 across the hose in the displacement direction, to clamp the hose, and then in the return direction to remove it from the hose.
Slangen 11 påvirkes av en tilbakeformingsinnretning 20. Denne oppviser to bakker 21 og 22, som kan beveges frem og tilbake på tvers av lengderetningen til slangen II og på tvers av bevegelsesretningen til pumpeskyveren 12, idet bevegelsen til bakkene 21, 22 er innbyrdes motsatt. I pumpestillingen (fig. 2) er bakkene 21, 22 beveget fra hverandre, slik at de frigir slangen 11, for at denne skal flatklemmes av pumpeskyveren 12 mot trykkflaten 17. I den tilbakeførte stillingen (fig. 3) av pumpeskyveren 12 er bakkene 21, 22 ført mot hverandre, slik at de trykker mot slangen fra motsatte sider, men de opprettholder en slik innbyrdes avstand at slangen gis rund form. The hose 11 is affected by a reshaping device 20. This has two slopes 21 and 22, which can be moved back and forth across the longitudinal direction of the hose II and across the direction of movement of the pump pusher 12, the movement of the slopes 21, 22 being mutually opposite. In the pump position (fig. 2), the slopes 21, 22 are moved apart, so that they release the hose 11, so that this is clamped flat by the pump pusher 12 against the pressure surface 17. In the returned position (fig. 3) of the pump pusher 12, the slopes 21 , 22 are brought towards each other, so that they press against the hose from opposite sides, but they maintain such a mutual distance that the hose is given a round shape.
Bakkene 21, 22 har mot hverandre vendende arbeidsflater 23 som er tilpasset formen til slangeomkretsen for den spenningsløse slangen 11. Som vist i fig. 3 støter bakkene 21, 22 ikke mot hverandre under tilbakeformingsprosessen, men opprettholder en slik avstand at slangen 11 uhindret kan innta sin opprinnelige form. The slopes 21, 22 have mutually facing working surfaces 23 which are adapted to the shape of the hose circumference for the tension-free hose 11. As shown in fig. 3, the slopes 21, 22 do not collide with each other during the re-forming process, but maintain such a distance that the hose 11 can assume its original shape unimpeded.
Bakkene 21, 22 styres synkront med bevegelsen til den tilhørende pumpeskyveren 12, slik at de inntar åpningsstillingen (fig. 2) når pumpeskyveren er i pumpestillingen, og inntar lukkestillingen (fig. 3) når pumpeskyveren 12 er i tilbakeført stilling. The trays 21, 22 are controlled synchronously with the movement of the associated pump pusher 12, so that they take the open position (fig. 2) when the pump pusher is in the pump position, and take the closed position (fig. 3) when the pump pusher 12 is in the retracted position.
Fortrinnsvis er det anordnet en egen tilbakeformingsinnretning 20 for hver av pumpeskyverne 12. Preferably, a separate re-forming device 20 is arranged for each of the pump pushers 12.
Forsøk har vist at det med infusjonspumpen i henhold til oppfinnelsen kan oppnås Experiments have shown that this can be achieved with the infusion pump according to the invention
små transportfeil.small transport errors.
I fig. 4 og 5 er vist et annet utførelseseksempel av oppfinnelsen. Pumpeskyveren 12 drives også her av en kamskive 16, som befinner seg på en kamaksel 15 og rager inn i et langstrakt hull 18 i pumpeskyveren 12. Pumpeskyveren 12 styres langs en lineær styring 30 på tvers av slangen 11. På den lineære styringen 30 er det for hver bakke 21, 22 anordnet en aksel 31, 32 som er fast i forhold til styringen 30, og rundt hvilken bakken 21, henholdsvis 22 kan svinge. I pumpeskyveren 12 er det dannet tilsvarende, langstrakte hull 33, 34, som akslene 31, 32 rager gjennom, slik at bevegelsen til pumpeskyveren ikke hindres av akslene. Dessuten er det på bakkene 21 og 22 anordnet stifter 35, 36 som rager sideveis ut fra hver bakke. Disse stifter 35, 36 rager inn i et langstrakt hull 37, 38 i pumpeskyveren 12. De langstrakte hull 37, 38 konvergerer mot den enden av skyveren 12 som er rettet mot slangen. De danner kulisseføringer for styring av svingebevegelsen til skyverne 21, 22 om deres aksler 31, 32. Bakkene 21, 22 er plater som forløper parallelt med den plateformede skyveren 1 2. In fig. 4 and 5 show another embodiment of the invention. The pump pusher 12 is also driven here by a cam disc 16, which is located on a camshaft 15 and projects into an elongated hole 18 in the pump pusher 12. The pump pusher 12 is controlled along a linear guide 30 across the hose 11. On the linear guide 30, there for each hill 21, 22, an axle 31, 32 is arranged which is fixed in relation to the guide 30, and around which the hill 21, respectively 22 can swing. Corresponding elongated holes 33, 34 are formed in the pump pusher 12, through which the shafts 31, 32 project, so that the movement of the pump pusher is not hindered by the shafts. In addition, pins 35, 36 are arranged on the slopes 21 and 22 which project laterally from each slope. These pins 35, 36 project into an elongated hole 37, 38 in the pump pusher 12. The elongated holes 37, 38 converge towards the end of the pusher 12 which is directed towards the hose. They form slide guides for controlling the swinging movement of the sliders 21, 22 about their shafts 31, 32. The slopes 21, 22 are plates that run parallel to the plate-shaped slider 1 2.
I fig. 4 er pumpeskyveren 12 vist i sin utskjøvne stilling, der den flatklemmer slangen II mot trykkplaten 17. Dermed fører de langstrakte hullene 37, 38 stiftene 35 og 36 og bakkene 21 og 22 fra hverandre, slik at bakkene 21, 22 svinger om sine aksler 31, 32, slik at tilbakeformingsinnretningen 20 befinner seg i åpningsstillingen. In fig. 4, the pump pusher 12 is shown in its extended position, where it clamps the hose II flat against the pressure plate 17. Thus, the elongated holes 37, 38 lead the pins 35 and 36 and the slopes 21 and 22 apart, so that the slopes 21, 22 swing about their axes 31 , 32, so that the back-forming device 20 is in the open position.
I fig. 5 er vist den tilstand at pumpeskyveren 12 er i den tilbakeførte stillingen. De langstrakte hullene 37, 38 styrer stiftene 35 og 36 slik at disse beveges mot hverandre, slik at bakkene 21, 22 føres til lukkestillingen, der de tilbakeformer slangen 11 til dens opprinnelige tilstand. In fig. 5 shows the condition that the pump pusher 12 is in the returned position. The elongated holes 37, 38 guide the pins 35 and 36 so that they move towards each other, so that the slopes 21, 22 are brought to the closed position, where they reshape the hose 11 to its original state.
Claims (4)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29604737U DE29604737U1 (en) | 1996-03-14 | 1996-03-14 | Infusion pump as a peristaltic pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NO971147D0 NO971147D0 (en) | 1997-03-12 |
| NO971147L true NO971147L (en) | 1997-09-15 |
Family
ID=8021065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO971147A NO971147L (en) | 1996-03-14 | 1997-03-12 | Infusion pump as a hose pump |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0800840A3 (en) |
| DE (1) | DE29604737U1 (en) |
| NO (1) | NO971147L (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2294765A1 (en) * | 1997-07-03 | 1999-01-14 | Robert Donald Grapes | A pump with flexible tube pinch mechanism |
| WO1999053201A1 (en) * | 1998-04-16 | 1999-10-21 | Dan Bron | Flow rate stabilizers for peristaltic pumps |
| US7150727B2 (en) | 2000-05-11 | 2006-12-19 | Zevex, Inc. | Apparatus and method for preventing free flow in an infusion line |
| US7815612B2 (en) | 2000-05-11 | 2010-10-19 | Zevex, Inc. | Apparatus and method for preventing free flow in an infusion line |
| CN1232313C (en) * | 2000-05-11 | 2005-12-21 | 泽维克斯公司 | Apparatus and method for preventing free flow in an infusion line |
| US8137083B2 (en) * | 2009-03-11 | 2012-03-20 | Baxter International Inc. | Infusion pump actuators, system and method for controlling medical fluid flowrate |
| CN102091364A (en) * | 2011-01-11 | 2011-06-15 | 毛爱民 | Infusion pump head capable of returning infusion tube and using method |
| US9463275B2 (en) * | 2011-09-26 | 2016-10-11 | Nipro Corporation | Infusion pump |
| US12029879B2 (en) | 2020-11-05 | 2024-07-09 | Carefusion 303, Inc. | Controllable pumping tubing |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1824962U (en) * | 1960-11-04 | 1961-01-12 | Werner Boess | MICROPUMP. |
| CH633352A5 (en) * | 1978-11-29 | 1982-11-30 | Doltron Ag | Hose pump. |
| DE3420861A1 (en) * | 1984-06-05 | 1985-12-05 | Biotest Pharma GmbH, 6000 Frankfurt | Peristaltic pump for medical purposes |
| CH668295A5 (en) * | 1985-05-02 | 1988-12-15 | Doltron Ag | HOSE PUMP. |
| US4781548A (en) * | 1987-04-10 | 1988-11-01 | Alderson Richard K | Infusion pump system and conduit therefor |
| US4867744A (en) * | 1987-05-21 | 1989-09-19 | Baxter International Inc. | Peristaltic linear pump with contoured rollers |
| DE3912405C1 (en) * | 1989-04-15 | 1990-10-31 | B. Braun Melsungen Ag, 3508 Melsungen, De | |
| US4954046A (en) * | 1989-12-08 | 1990-09-04 | Imed Corporation | Peristaltic pump with mechanism for maintaining linear flow |
| WO1991016933A1 (en) * | 1990-05-04 | 1991-11-14 | Block Medical, Inc. | Disposable infusion apparatus with peristaltic pump |
| JPH06319798A (en) * | 1993-05-11 | 1994-11-22 | Terumo Corp | Transfusion pump |
| US5499906A (en) * | 1994-08-08 | 1996-03-19 | Ivac Corporation | IV fluid delivery system |
| US5660529A (en) * | 1994-12-06 | 1997-08-26 | Mcgaw, Inc. | Linear peristaltic pump with reshaping fingers interdigitated with pumping elements |
-
1996
- 1996-03-14 DE DE29604737U patent/DE29604737U1/en not_active Expired - Lifetime
-
1997
- 1997-02-25 EP EP97103002A patent/EP0800840A3/en not_active Withdrawn
- 1997-03-12 NO NO971147A patent/NO971147L/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NO971147D0 (en) | 1997-03-12 |
| EP0800840A3 (en) | 1997-11-12 |
| DE29604737U1 (en) | 1997-07-17 |
| EP0800840A2 (en) | 1997-10-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| NO971147L (en) | Infusion pump as a hose pump | |
| US4624254A (en) | Apparatus for applying surgical clips | |
| US5431668A (en) | Ligating clip applier | |
| CN106456184B (en) | Medical shaft-type instrument comprising different storage position distances of the clip entrainment elements and/or the retaining lugs by means of the clip | |
| US5513957A (en) | IV fluid delivery system | |
| US6234773B1 (en) | Linear peristaltic pump with reshaping fingers interdigitated with pumping elements | |
| WO2011082135A4 (en) | Peristaltic pump with controlled deformation of the tube | |
| WO1996005433A1 (en) | Iv fluid delivery system | |
| EP2139411A1 (en) | Apparatus for forming variable height surgical fasteners | |
| CN108290194B (en) | Clamp system for bending press | |
| US8353547B2 (en) | Equipment for the simultaneous manipulation of several components | |
| CN102885123A (en) | Clipping machine with a shortened crank drive | |
| US4852382A (en) | Die stamping and punching tool | |
| CN109864788A (en) | Scalp hemostasis rifle and magazine component | |
| GB2202605A (en) | Apparatus for affixing fasteners to a conveyor belt | |
| WO2013149840A1 (en) | Clipping tool assembly with crank shaft | |
| US3348250A (en) | Machine for pulling over, heel forming and lasting of shoes | |
| UA119382C2 (en) | CLIPPER PRESSING UNIT (OPTIONS) | |
| CN108025131B (en) | Infusion pump | |
| US3064711A (en) | Draw bending apparatus | |
| CN104306104B (en) | A kind of intraocular lens's stiching instrument | |
| US2814042A (en) | Fastener applying device | |
| CN115054303A (en) | Driving mechanism of repeating clip applier | |
| CN210082711U (en) | Mechanism for preventing staple from bending on binding machine | |
| CN113580114B (en) | Exoskeleton device for assisting in liquid preparation of syringe and control method thereof |