[go: up one dir, main page]

WO1999026675A1 - Systeme d'actionnement de pompes pour le sang - Google Patents

Systeme d'actionnement de pompes pour le sang Download PDF

Info

Publication number
WO1999026675A1
WO1999026675A1 PCT/DE1998/003209 DE9803209W WO9926675A1 WO 1999026675 A1 WO1999026675 A1 WO 1999026675A1 DE 9803209 W DE9803209 W DE 9803209W WO 9926675 A1 WO9926675 A1 WO 9926675A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
drive
blood pump
medium
pump according
Prior art date
Application number
PCT/DE1998/003209
Other languages
German (de)
English (en)
Inventor
Peter Neubacher
Original Assignee
Peter Neubacher
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Peter Neubacher filed Critical Peter Neubacher
Priority to AU17488/99A priority Critical patent/AU1748899A/en
Publication of WO1999026675A1 publication Critical patent/WO1999026675A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02—Linear motors; Sectional motors

Definitions

  • Blood pumps are known in medicine for the extracorporeal maintenance of a blood circulation system or in the form of implants.
  • the medium, such as blood is guided in a blood sack made of flexible material, this blood sack being pressed and relaxed by means of flat stamps, whereby the pumping effect is achieved.
  • a hinged anchor system in which the blood sack is arranged between an anchor and an abutment. The movement of the hinged anchor alone causes the pumping.
  • the blood sack is arranged between two anchors lying opposite one another, the anchors each being provided with at least two springs.
  • the anchor is not with the Electromagnet connected.
  • the known pumps have a number of disadvantages. On the one hand, not inconsiderable air gaps can be overcome magnetically in the conventional systems. In addition, considerable forces are required to move the anchors from the rest position in the double anchor systems and to achieve the pumping action under the spring force. Outside, considerable magnetic forces have to be used to attract the anchors. This in turn leads to a high energy requirement and consequently large currents and the resulting field forces. The high energy consumption is particularly disadvantageous in the case of implantable pumps. The object of the present invention is therefore to create a pump which overcomes the disadvantages of the known pump systems.
  • the object is achieved in that a drive for blood pump in the form of a servo linear motor with a magnet system and with a mechanically sliding piston controlled by an absolute displacement sensor with switchable windings is created.
  • a cable duct is provided through a groove in the yoke and a non-rotatable mounting of the piston.
  • a pressure sensor is advantageously arranged in the delivery medium.
  • an elastic container for the pumped medium is arranged in the interior of the piston.
  • an elastic container for the medium is arranged outside the piston.
  • the elastic container can also be arranged between two drives for blood pumps according to the invention.
  • the new drive for blood pumps according to the invention has a number of advantages over known blood pumps.
  • the drive according to the invention is outstandingly suitable for mobile cardiac support systems.
  • the low-noise running and the protection of the vascular system due to any adaptable pressure curve is particularly advantageous.
  • the new drive is small in diameter, flat in construction and light in weight. Its mechanics are straightforward and have only a few moving parts. The noise development of the drive is very low and is unmatched by any other drive in this area of application.
  • the servo linear motor with control electronics works with the 12 V DC voltage common to cars and also works perfectly on the 24 V on-board electrical system, e.g. Trucks and ships. This means that the system can also be operated in a car on a cigarette lighter, for example to protect the system's own battery.
  • the pump function is retained with certain restrictions even if the displacement transducer is defective (emergency operation without servo control). The pump still works adequately even when there is no turn. Emergency operation is also possible if one or two windings fail completely.
  • the pumping movement is possible in both directions.
  • the movement curve (stroke speed, max. Force) can be freely determined and is controlled via one or two absolute displacement sensors.
  • the stroke is almost unlimited. It is an advantage of the drive according to the invention that the efficiency and the force do not decrease with a large stroke.
  • the drive can optionally be rotated and accommodated in an oval instead of a round shape in the housing.
  • the drive according to the invention has a very simple structure. It essentially consists of a magnet system with a coil piston. The air gap of several millimeters, in which the coil piston slides back and forth, is relatively large.
  • the drive according to the invention can also be equipped with an additional external magnet.
  • the inner magnet is mandatory because a large coil diameter is of great advantage for the target application.
  • the drive according to the invention has three or more separate windings, each of which is controlled individually.
  • the speaker has only one continuous winding.
  • the driven winding of the drive is always in the high-energy air gap.
  • the winding that emerges is switched off successively and the winding that enters the air gap is switched on successively.
  • the moving or stationary part can be either the magnet system or the coil piston. If the magnet system is the moving part, it can also be stored on the pump housing.
  • the coil piston is mechanically supported in the drive according to the invention. It is made of stable material and slides on the inner (and possibly the outer part).
  • a modern, very small and high-energy permanent magnet is used to manufacture the pump drive in reasonable dimensions and with an acceptable weight.
  • Another object of the present invention is the use of a servo linear motor with a magnet system and with a mechanically sliding piston controlled by absolute displacement sensors with switchable windings as a drive for blood pumps.
  • FIGS. 1 and 2. Show it:
  • Fig. 1 shows the inner magnet of a drive according to the invention in different views
  • Fig. 2 shows the inner and outer magnets of a drive according to the invention in different views.
  • the servo linear motor consists of a magnet system with a piston that slides mechanically in the high-energy air gap, whereby pumping is possible in both directions.
  • Several separate windings are arranged next to one another in slots on the piston.
  • the stroke, stroke speed and force of the piston can be freely determined within one pumping period.
  • the stroke is controlled by an absolute displacement sensor.
  • the new drive is small in diameter, flat in construction and light in weight. Its mechanics are uncomplicated and have only a few moving parts. The drive generates very little noise. It can be controlled and regulated very sensitively and precisely.
  • the drive should make it possible, for example, to operate a pump for conveying sensitive liquids which is very quiet and whose speed of movement and pumping force can be controlled at any time within a pumping period. If necessary, the pump pressure can also be regulated via a pressure sensor in the medium to be pumped. In principle, it does not matter whether the piston or the magnet system are the moving part.
  • an elastic container can be accommodated in the interior of the piston between the piston cover and the disc (lf, 2f), which is pressed out periodically.
  • the inlet and outlet can be fed through openings in the piston cover or through bores through the magnet system.
  • the linear motor shown in FIGS. 1 and 2 is used to generate strokes up to 11 mm and consists essentially of a magnet system, similar to that used for loudspeakers, and a piston on which several separate windings (la , 2a) are arranged side by side in grooves.
  • the coil wires of the individual coils are led to the "wiring chamber" (lk, 2k) in such a way that unnecessary widening of the air gap in its entire extent and thus unnecessary energy weakening is avoided.
  • the piston is rotatably supported with a guide pin (Im, 2m) running in an elongated hole (In) or a bore (2n), and one or more grooves are milled out as a "cable duct" in the yoke (Id, 2j) Energy losses are therefore limited to this relatively small area.
  • the servo linear motor can also be equipped with an additional external magnet (FIG. 2).
  • the inner magnet is obligatory because a large coil diameter is a great advantage for pumping.
  • the magnetic system of the linear motor shown in FIG. 2 is equipped with an additional external magnet (2d) which is connected "m series" with the internal magnet and thus leads to even higher energies in the air gap (2e) additional ring made of magnetically conductive material (2j) led to the air gap.
  • the magnet system consists of a magnet (lb, 2b), the quality of which largely determines the size, weight and efficiency of the system, a disk-shaped yoke (lc, 2c) and a tubular yoke (ld), which directs the magnetic flux to the right place, namely the air gap (le) conducts.
  • the other pole of the magnet reaches the air gap via the magnetically conductive disc (lf, 2f).
  • the piston (lg, 2g) is made of magnetically non-conductive material. Electrically, it should be poorly conductive, in order to keep the eddy currents small, especially during fast movements.
  • the piston (lg, 2g) is mechanically on the disc (lf, 2f) and the non-magnetic Table cylindrical material existing cylindrical ring (outer surface of lh, 2h) stored.
  • the piston is also supported on the outside on the inner surface of ID.
  • the moving or stationary part can be either the magnet system or the coil piston. If the magnet system is the moving part, it can also be stored on the pump housing.
  • the windings are not switched over to generate movement, but only to actively supply the windings with current that are currently in the high-energy air gap (le, 2e).
  • the force is determined by the current and the direction of movement by the current direction. The fact that only the winding part located in the energy-rich air gap flows through current means that power consumption and heating are reduced to the necessary minimum.
  • the air gap can be partially or completely filled with suitable magnetic fluids.
  • the casting compound of the coils consists of media that require magnetic flux.
  • the manufacture of the drive according to the invention is known to the person skilled in the art. Such drive systems are also used, for example, in a different form in loudspeaker systems. In addition to iron, other magnetically conductive materials which are known to the person skilled in the art can also be used for the production of the drive according to the invention.
  • the electronic circuit required for controlling the drive according to the invention is known per se to the person skilled in the art. In particular, circuits can be used here which are known, for example, for blood pumps and cardiac support systems.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • External Artificial Organs (AREA)
  • Reciprocating Pumps (AREA)

Abstract

L'invention concerne un système d'entraînement de pompes pour le sang, se présentant sous forme de servomoteur linéaire comprenant un système magnétique (1b, 2b) et un piston à glissement mécanique (1g, 2g), piloté par un capteur de déplacement absolu et muni de bobines réversibles (2a, 1a). Ce nouveau système d'entraînement de pompes pour le sang s'utilise en tout premier lieu pour les systèmes d'assistance cardiaque mobiles. Il présente pour principaux avantages d'avoir un fonctionnement silencieux et de ne pas altérer le système vasculaire grâce à une marche de pression entièrement adaptable.
PCT/DE1998/003209 1997-11-19 1998-10-28 Systeme d'actionnement de pompes pour le sang WO1999026675A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU17488/99A AU1748899A (en) 1997-11-19 1998-10-28 Blood pump drive mechanism

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19753041.9 1997-11-19
DE1997153041 DE19753041A1 (de) 1997-11-19 1997-11-19 Servo-Linearmotor als Pumpenantrieb

Publications (1)

Publication Number Publication Date
WO1999026675A1 true WO1999026675A1 (fr) 1999-06-03

Family

ID=7850251

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1998/003209 WO1999026675A1 (fr) 1997-11-19 1998-10-28 Systeme d'actionnement de pompes pour le sang

Country Status (3)

Country Link
AU (1) AU1748899A (fr)
DE (1) DE19753041A1 (fr)
WO (1) WO1999026675A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6984201B2 (en) 2000-09-23 2006-01-10 Harefield Cardiac Limited Blood circulation assistance device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19963306C2 (de) * 1999-12-16 2003-02-27 Peter Neubacher Antrieb für Blutpumpe
KR100498302B1 (ko) * 2000-12-27 2005-07-01 엘지전자 주식회사 리니어 컴프레샤의 용량가변형 모터

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3842440A (en) * 1972-09-01 1974-10-22 E Karlson Implantable linear motor prosthetic heart and control system therefor
DE3342534A1 (de) * 1982-11-22 1984-10-31 Helmut Ludwig 1000 Berlin Steiner Elektromechanischer blutpumpenantrieb
EP0417956A2 (fr) * 1989-09-05 1991-03-20 Linear Drives Limited Améliorations dans la commande des moteurs linéaires
US5081381A (en) * 1990-02-19 1992-01-14 National Space Development Agency Of Japan Electromagnetic actuator with linear control
US5179306A (en) * 1990-01-10 1993-01-12 Escue Research And Development Company Small diameter brushless direct current linear motor and method of using same
US5300111A (en) * 1992-02-03 1994-04-05 Pyxis, Inc. Total artificial heart
US5360445A (en) * 1991-11-06 1994-11-01 International Business Machines Corporation Blood pump actuator
WO1995023000A2 (fr) * 1994-02-25 1995-08-31 General Dynamics Corporation Dispositif de pompe a piston alternatif

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4692673A (en) * 1982-02-22 1987-09-08 Sanford D. DeLong Electromagnetic reciprocating pump and motor means
US4595870A (en) * 1984-08-07 1986-06-17 Anorad Corporation Linear motor
US4751437A (en) * 1986-03-26 1988-06-14 Varian Associates, Inc. Wide bandwidth linear motor system
GB2305021A (en) * 1995-08-29 1997-03-26 Custom Dev Ltd Stator winding lay-out for an electric motor

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3842440A (en) * 1972-09-01 1974-10-22 E Karlson Implantable linear motor prosthetic heart and control system therefor
DE3342534A1 (de) * 1982-11-22 1984-10-31 Helmut Ludwig 1000 Berlin Steiner Elektromechanischer blutpumpenantrieb
EP0417956A2 (fr) * 1989-09-05 1991-03-20 Linear Drives Limited Améliorations dans la commande des moteurs linéaires
US5179306A (en) * 1990-01-10 1993-01-12 Escue Research And Development Company Small diameter brushless direct current linear motor and method of using same
US5081381A (en) * 1990-02-19 1992-01-14 National Space Development Agency Of Japan Electromagnetic actuator with linear control
US5360445A (en) * 1991-11-06 1994-11-01 International Business Machines Corporation Blood pump actuator
US5300111A (en) * 1992-02-03 1994-04-05 Pyxis, Inc. Total artificial heart
WO1995023000A2 (fr) * 1994-02-25 1995-08-31 General Dynamics Corporation Dispositif de pompe a piston alternatif

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6984201B2 (en) 2000-09-23 2006-01-10 Harefield Cardiac Limited Blood circulation assistance device

Also Published As

Publication number Publication date
DE19753041A1 (de) 1999-05-20
AU1748899A (en) 1999-06-15

Similar Documents

Publication Publication Date Title
DE60133283T2 (de) Durchflussregelventil und sphygmomanometer
EP1171711B1 (fr) Organe de commande a piston oscillant
DE60013705T2 (de) Selbstverriegelndes Elektromagnetventil und Steuerschaltung
DE2528873A1 (de) Schnellansprechendes ventil
EP0450288B1 (fr) Moteur électrique linéaire
EP2178581A1 (fr) Commande linéaire et système de pompage, notamment coeur artificiel
EP0163602B1 (fr) Disposition pour augmenter la force d'entraînement d'un moteur de commande dans un entraînement positionneur linéaire
EP0126973A1 (fr) Mémoire à disques avec dispositif de positionnement et aimant de verrouillage
WO1996033547A1 (fr) Dispositif d'entrainement comportant un moteur electrique et un relais commutant le courant du moteur
WO1999026675A1 (fr) Systeme d'actionnement de pompes pour le sang
DE19941109B4 (de) Antriebsvorrichtung für eine Festplatte
DE69220603T2 (de) Proportionales, elektromagnetisches Stellglied und dasselbe enthaltendes Pumpensystem
EP3488107B1 (fr) Pompe volumétrique oscillante comprenant un entraînement électro-dynamique et son procédé de fonctionnement
EP0460666A1 (fr) Rétroviseur extérieur de véhicule à fonctionnement électrique
WO2000037126A1 (fr) Pompe pulsatile
DE19963306C2 (de) Antrieb für Blutpumpe
EP1126582A2 (fr) Actionneur linéaire
DE3342534C2 (de) Elektromechanischer Blutpumpenantrieb
DE3315848A1 (de) Aktuatorvorrichtung an schreib- und lesegeraeten zur staendigen korrektur der raeumlichen stellung eines schreib- oder lesemittels, insbesondere eines strahlenbuendels
EP0825369B1 (fr) Dispositif d'ajustage pour l'impédance d'un circuit magnétique d'une vanne électromagnétique
DE3519348C2 (de) Eine lineare Vorschubbewegung erzeugende Einrichtung
DE2602375A1 (de) Elektro-hydraulisches regelventil
EP1219935B1 (fr) Capteur électrique de déplacement pour appareil hydraulique
DE3826359C2 (fr)
DE1764921A1 (de) Verstellbares elektromagnetisches Relais

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DK EE ES FI GB GE GH GM HR HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW SD SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
NENP Non-entry into the national phase

Ref country code: KR

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA