EP0242077A2 - Peristaltische Pumpe - Google Patents

Peristaltische Pumpe Download PDF

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Publication number
EP0242077A2
EP0242077A2 EP87302712A EP87302712A EP0242077A2 EP 0242077 A2 EP0242077 A2 EP 0242077A2 EP 87302712 A EP87302712 A EP 87302712A EP 87302712 A EP87302712 A EP 87302712A EP 0242077 A2 EP0242077 A2 EP 0242077A2
Authority
EP
European Patent Office
Prior art keywords
pressure
peristaltic pump
pressure plate
pressure member
fluid
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.)
Withdrawn
Application number
EP87302712A
Other languages
English (en)
French (fr)
Other versions
EP0242077A3 (de
Inventor
Alan Reginald Bowley
Derek William Ross
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IBG Systems Ltd
Original Assignee
IBG Systems Ltd
Fisons Ltd
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 IBG Systems Ltd, Fisons Ltd filed Critical IBG Systems Ltd
Publication of EP0242077A2 publication Critical patent/EP0242077A2/de
Publication of EP0242077A3 publication Critical patent/EP0242077A3/de
Withdrawn legal-status Critical Current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
    • F04B43/1292—Pumps specially adapted for several tubular flexible members

Definitions

  • This invention relates to a peristaltic pump comprising a movable pressure member and a pressure plate.
  • Peristaltic pumps are used in the delivery of fluids for a variety of medicinal and industrial purposes.
  • Some conventional pumps comprise a rotor upon which a plurality of pressure members, eg rollers are mounted, and a pressure plate.
  • a flexible-walled tube or a plurality of such tubes running substantially parallel to each other are positioned between the pressure plate and the pressure members so that on rotation of the rotor the pressure members are successively brought into contact with the tubing, the latter being repeatedly compressed and released causing a fluid contained in the tube to progress through the tubing and be delivered as discrete unit volumes.
  • the total volume of fluid that can be delivered is dependent upon, in that it will be a multiple of, the minimum volume of fluid that can be delivered as a discrete unit volume, which is itself controlled by the distance between adjacent pressure members. The closer the pressure members are together, the smaller the discrete unit volume which can be delivered. When small total volumes of fluid are to be delivered the discrete unit volume should be as small as possible.
  • the invention solves the problem of how to design a peristaltic pump which is not mechanically complex and in which the force applied to a flexible walled tube accommodated between the pressure member and pressure plate is constant.
  • a peristaltic pump comprising a moveable pressure member and a pressure plate, capable of compressing a flexible walled tube between the pressure member and the pressure plate, characterised in that the pressure member and the pressure plate are capable of being hydraulically biased together.
  • the pressure plate to be capable of being hydraulically biased towards the pressure member.
  • the hydraulic biasing means preferably comprises a pressure chamber capable of receiving a fluid.
  • the hydraulic biasing means is preferably situated adjacent to the pressure plate.
  • the pressure chamber may take the form of a flexible bag or, more preferably, is a solid walled chamber being open on one side. The open side is preferably that adjacent to the pressure plate, in which case the pressure chamber may be separated from the pressure plate by a flexible partition.
  • the peristaltic pump may be provided with a plurality of pressure chambers. We prefer there to be two pressure chambers.
  • the fluid may be a gas or a compressible liquid.
  • the fluid may be a gas, eg compressed air.
  • the pressure chamber is preferably provided with a fluid inlet/outlet aperture which may be connected to a fluid supply, eg an air compressor, so that the desired pressure may be obtained and maintained in the pressure chamber.
  • a fluid supply eg an air compressor
  • the fluid supply to the hydraulic biasing means to be capable of adjustment between an operating mode in which the hydraulic biasing means is provided with fluid such that the pressure member and pressure plate are hydraulically biased together and a non-operating mode in which the fluid supply to the hydraulic biasing means is restricted and the pressure member and pressure plate are not hydraulically biased together.
  • the peristaltic pump to be such that when the power supply to the pump is switched off the fluid supply to the hydraulic biasing means, eg pressure chamber is restricted at the same time. The force of the pressure plate on the tube is thereby released when the pump is not in use, which prevents the tubes from becoming distorted.
  • the flexible bag or flexible partition is preferably of a flexible, non-gas-permeable material for example neoprene or silicone rubber.
  • the pressure plate is preferably mounted in the pump so as to be slidable towards the pressure member.
  • the pressure plate may be provided with means for limiting its sliding motion towards the pressure member. Such provision may prevent damage to the flexible-walled tube if the force produced by the hydraulic biasing means exceeds the desired maximum.
  • the limiting means may take the form of a shoulder which is capable of co-operating with a corresponding lip on the peristaltic pump.
  • the surface of the pressure plate which is capable of contacting the flexible walled tube may be flat, but is preferably arcuate.
  • the peristaltic pump may be provided with one pressure plate or preferably a plurality of pressure plates. We prefer to provide one pressure plate for each individual tube accommodated in the peristaltic pump such that in use, each pressure plate contacts only one tube.
  • each pressure plate is individually mounted so as to be slidable towards the pressure member.
  • the position of each pressure plate may vary with respect to the others, such that manual individual adjustment of each pressure plate is not necessary and each pressure plate compensates for variation in the force applied to the tube it contacts.
  • the peristaltic pump is preferably provided with a plurality of pressure members.
  • the pressure member to be a cylindrical roller.
  • the number of pressure members, eg rollers to be more than l0, preferably greater than 20, eg 25.
  • the pressure members to be mounted upon and regularly radially disposed around a rotor parallel to its axis of rotation.
  • the rotor prefferably be centrally provided in the pump and to be capable of bidirectional movement.
  • the rotor may be driven by a stepping motor or equivalent drive system which is able to turn the rotor through precisely determined angles.
  • peristaltic pump is capable of accommodating a plurality of flexible-walled tubes running substantially parallel to each other and each being capable of being compressed between a pressure member and a pressure plate.
  • Flexible-walled tubes for use in a peristaltic pump according to the invention, may be made of a resilient, elastic material, eg. silicone rubber. The diameter of the tubes may vary according to the fluid to be pumped and the desired delivery volume.
  • peristaltic pumps according to the invention is mainly that of constantly accurate delivery of small discrete unit volumes, eg 5 micro-litres, of fluid.
  • the drawings show a peristaltic pump (l) capable of accommodating a plurality of flexible walled tubes (9) between a plurality of pressure members, eg rollers (5) which are mounted upon and radially disposed around a rotor centrally provided in the pump, and a plurality of pressure plates (6) which are slidably mounted in the main body of the pump surrounding the rollers.
  • the pressure plates are capable of being hydraulically biased towards the rollers by means of compressed air supplied to a pressure chamber separated from the pressure plates by a flexible partition.
  • the pressure plates (6) are lined up in two groups of six on either side of the pump (l) parallel to the axis of rotation of the rotor (3). Each pressure plate (6) is in contact with one of l2 flexible walled tubes (9) accommodated in the pump (l) between the rollers (5) and the pressure plates (6).
  • the flexible walled tubes (9) enter and leave the pump through the guide means (l6) provided in the pump (l).
  • the pressure plates (6) are each independently mounted so that they are slidable towards the rollers (5).
  • the surface (l0) of the pressure plates (6) in contact with the flexible-walled tube (9) is arcuate.
  • the pressure plates (6) are provided with a shoulder (ll) at the end of the pressure plate (6) away from the tube (9), which shoulder (ll) co-operates with a corresponding lip (l2) on the pump (l) which limits the force that the pressure plate (6) can apply to the tube (9).
  • Each group of pressure plates along with the pressure chamber (7) is pivotally mounted (l4) on the peristaltic pump such that they may be pivoted from a closed position as shown in Figure l to an open position in which the flexible walled tubes (9) may be easily inserted or removed from the pump (l).
  • the pressure plates (6) and pressure chambers (7) are held in the closed position by means of a clamping bolt (l5a,b).
  • the pressure chamber (7) is provided with a fluid inlet/outlet aperture (l3), connectable to a fluid supply, eg an air compressor, which may be used to provide the desired pressure.
  • the pressure chamber (7) In the operating mode the pressure chamber (7) is filled with compressed air.
  • the slidably mounted pressure plates (6) are thereby biased towards the tubes (9) by the flexible partition (8).
  • the individual rollers (5) sequentially engage the tubes (9).
  • the tubes (9) are compressed by each individual roller (5) in turn and are released when not compressed, thus allowing a fluid contained in the tubes (9) to progress through the tube and be delivered in discrete unit volumes.
  • the pressure chamber (7) is depressurised by restriction of the compressed air supply from the air compressor to the pressure chamber, which leads to the relaxation of the flexible partition (8) such that the pressure plates (6) are not biased towards the rollers and the flexible walled tubes (9) are not compressed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
EP87302712A 1986-04-12 1987-03-30 Peristaltische Pumpe Withdrawn EP0242077A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8608950 1986-04-12
GB868608950A GB8608950D0 (en) 1986-04-12 1986-04-12 Devices

Publications (2)

Publication Number Publication Date
EP0242077A2 true EP0242077A2 (de) 1987-10-21
EP0242077A3 EP0242077A3 (de) 1988-07-20

Family

ID=10596097

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87302712A Withdrawn EP0242077A3 (de) 1986-04-12 1987-03-30 Peristaltische Pumpe

Country Status (3)

Country Link
EP (1) EP0242077A3 (de)
JP (1) JPS62243980A (de)
GB (1) GB8608950D0 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991002900A1 (en) * 1989-08-18 1991-03-07 Randolph Austin Company Variable occlusion peristaltic apparatus and method
US5033942A (en) * 1990-03-30 1991-07-23 Ransburg Corporation Peristaltic voltage block roller actuator
FR2739662A1 (fr) * 1995-10-09 1997-04-11 Ideatec Sa Perfectionnement aux dispositifs de pompes peristaltiques

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5555447B2 (ja) * 2009-04-27 2014-07-23 日機装株式会社 ポンプ装置、生体成分測定装置及び人工膵臓装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1140820B (de) * 1953-08-03 1962-12-06 Nikolaus Laing Schlauchpumpe
GB990548A (en) * 1960-12-20 1965-04-28 Technicon Instr Multiple-tube pump
US3425357A (en) * 1967-08-23 1969-02-04 Technicon Corp Peristaltic pump with regular air bubble introduction
CH519107A (fr) * 1970-08-14 1972-02-15 Martini Giancarlo Machine pour le transfert de matériaux denses
FR2107507A5 (de) * 1970-09-14 1972-05-05 Technicon Instr

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1140820B (de) * 1953-08-03 1962-12-06 Nikolaus Laing Schlauchpumpe
GB990548A (en) * 1960-12-20 1965-04-28 Technicon Instr Multiple-tube pump
US3425357A (en) * 1967-08-23 1969-02-04 Technicon Corp Peristaltic pump with regular air bubble introduction
CH519107A (fr) * 1970-08-14 1972-02-15 Martini Giancarlo Machine pour le transfert de matériaux denses
FR2107507A5 (de) * 1970-09-14 1972-05-05 Technicon Instr

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991002900A1 (en) * 1989-08-18 1991-03-07 Randolph Austin Company Variable occlusion peristaltic apparatus and method
US5009573A (en) * 1989-08-18 1991-04-23 Randolph Austin Company, Inc. Variable occlusion peristaltic apparatus and method
US5033942A (en) * 1990-03-30 1991-07-23 Ransburg Corporation Peristaltic voltage block roller actuator
FR2739662A1 (fr) * 1995-10-09 1997-04-11 Ideatec Sa Perfectionnement aux dispositifs de pompes peristaltiques

Also Published As

Publication number Publication date
GB8608950D0 (en) 1986-05-14
EP0242077A3 (de) 1988-07-20
JPS62243980A (ja) 1987-10-24

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Inventor name: BOWLEY, ALAN REGINALD

Inventor name: ROSS, DEREK WILLIAM