US3724974A - Peristaltic pump - Google Patents

Peristaltic pump Download PDF

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Publication number
US3724974A
US3724974A US00175129A US3724974DA US3724974A US 3724974 A US3724974 A US 3724974A US 00175129 A US00175129 A US 00175129A US 3724974D A US3724974D A US 3724974DA US 3724974 A US3724974 A US 3724974A
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Prior art keywords
pipe
pump
elements
configuration
rotor
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Expired - Lifetime
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US00175129A
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English (en)
Inventor
R Molimard
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Laboratoires Jacques Logeais SA
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Laboratoires Jacques Logeais SA
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    • 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

Definitions

  • the path of the rollers, the spacing between the rollers and the configuration of the pipe are such that, when the downstream roller moves away from the pipe an upstream element already closes the pipe and causes the fluid to progress as the downstream roller causes a decompression of the pipe.
  • the intermediate roller progressively compresses the pipe so as to ensure an exact volumetric compensation at each instant of the decompression due to the downstream roller by the compression due to the intermediate roller.
  • the present invention relates to peristaltic pumps of the type in which an elastically yieldable pipe is periodically compressed against a support face which imparts to the pipe a fixed configuration by at least one roller or other moving element which travels through a path which encounters said configuration, the roller or rollers urging the fluid contained in the pipe in the downstream direction as they travel along and compress the pipe.
  • An object of the invention is to remedy these draw 7 tion of the downstream roller on the stages of operation of the pump during the rotation of the rotor;
  • FIGS. 5, 6 and 7 are sectional views, taken along lines 5-5, 6-6 and 7-7 of FIGS 2, 3 and 4, of the acpipe in the positions in FIGS. 2, 3 and 4 respectively;
  • FIG. 8 is a diagrammatic top plan view of a fixed circular configuration given to the pipe and the relative positions of the three rollers at one stage of operation of the pump during the rotation of the rotor,
  • FIG. 9 is a diagrammatic top plan view of a fixed sinusoidal configuration given to the pipe and the relative positions of a number of rollers at one stage of operation of the pump during the rotation of the rotor
  • FIG. 10 is a diagrammatic top plan view of a fixed rectilinear configuration given to the pipe and the relative position of a number of rollers at one stage of operation of the pump during the rotation of the rotor.
  • the pump comprises a base 1 constituted by a circular plate on which is disposed an annular element 2.
  • Theannular element 2 is centered on the base 1 by means of an annular projection 3 on the base which cooperates with a corresponding recess 4 in the body 2.
  • the invention provides a peristaltic pump comprising a support ramp for an elastically yieldable pipe which imparts to the pipe a fixed configuration, and at least three pressing rollers or other moving elements which are caused to travel in a path which'encounters said configuration so as to compress the pipe and move away from the pipe alternately, the fixed configuration imparted to the pipe by the ramp, the path of the rollers and spacing between the rollers being such that when the downstream roller moves away from the pipe an upstream roller already closes the pipe and causes the fluid to progress as the downstream roller causes a decompression of the pipe, the intermediate roller located between the upstream roller and downstream roller progressively compressing the pipe so as to ensure an exact volumetric compensation, at each instant, of the decompression due to the downstream roller by the compression due to the intermediate roller.
  • FIG. 1 is a sectional view of a cording to the invention
  • FIGS. 2, 3 and 4 are diagrammatic top plan views of the fixed configuration given to the pipe and the relative positions of the three rollers in three different peristaltic pump ac-'
  • the element 2 has in its upper part a horizontal, radially inwardly-extending flange 5 and a shoulder 6.
  • the shoulder 6 co-operates with a recess 7 of complementary shape in an annular element 8 whose outer periphery is circular and has the same diameter as the element 2 and base 1 but whose inner periphery has a special shape in plan which will be described hereinafter.
  • the inner face of the element 8 is parallel to its axis and makes a right angle with the horizontal flange 5 of the element 2.
  • the element 2 defines a circular cavity in which the mechanism of the pump is located.
  • This mechanism comprises a vertical drive shaft 9 having at its lower end a hollow enlarged portion 10 which extends through a center aperture 11 in the base 1 and is supported in the latter by a rolling bearing 12.
  • a circular roller-carrying plate 13 On the shaft 9 there is freely rotatably mounted a circular roller-carrying plate 13 having a hollow hub 14 provided with a knob 15 whereby it is possible to rotate the plate 13 on the shaft 9 manually.
  • the plate 13 has on its lower face an annular groove 16 defining a center portion 17 having a diameter corresponding'to that of the immediately adjacent part of the enlarged portion 10.
  • the center portion 17 is connected to the portion 10 by a suitable coupling means of the freewheel type so that the plate 13 can be driven in rotation in one direction by the shaft 9 and can also be driven directly in the same direction by the knob 15 when the shaft 9 is I stationary.
  • this coupling is of a known type comprising a coil spring 18 surrounding the portions 10 and 17.
  • the plate 13 carries three rollers 19 which are rotatably mounted by means of rolling bearings 20 disposed in recesses provided in the plate and angularly evenly spaced apart and disposed at a given distance from the axis of rotation of the shaft 9 and plate 13.
  • Each roller 19 has a spindle 21 which extends through the plate and a lower end portion which extends downwardly beyond the plate and is fixed to a gear pinion 22.
  • Each pinion 22 meshes with a ring gear 23 which has internal gear teeth and is fixed to the element 2.
  • the plate 13 is preferably positioned in the element 2 by means of a rolling bearing 24 whose outer ring is fixed to the element 2 and whose inner ring is fixed to the periphery of the plate 13.
  • This mechanism operates in the manner of a planetary gear device.
  • the plate 13 is a planet gear carrier whose planet gears 22 mesh with the ring gear 23.
  • the pump is completed by an elastically yieldable pipe 25, for example of rubber or any other appropriate material having such characteristics of elasticity that it automatically assumes its initial shape after having been flattened.
  • the pipe 25 is disposed in the right angle defined by the upper horizontal face of the flange and the inner peripheral face of the element 8, the pipe being interposed between and bearing against this inner face and the rollers 19.
  • the element 8 has such shape viewed in plan (in FIGS. 2-4) that its inner peripheral wall or face defines two part-circular portions 26a, 26b which have the same center on the axis 9 of the rotor and subtend the same angle of more than 60 at the center.
  • the part-circular portions 26a, 26b are extended on each side by segments 27a, b, c, d, which extend in a direction away from the center 9 of the circular path through which the rollers travel.
  • the segments 27b, 27c are connected by a curved connecting portion 29 of small radius and, on the side of the portions 26a, 26b opposed to the portion 29, the segments 27a and 27d are connected to an inlet portion 28 and an outlet portion 28 respectively through two portions which are curved in opposite directions.
  • Suitable passages or channels are provided in the element 8 through which the inlet and outlet ends of the pipe 25 extend out of the body.
  • the segments 27a, b, c, d are rectilinear segments which are tangent to the part-circular portions 260 and 26b and consequently extend in a direction away from the center 9 of these part-circular portions and away from the path of movement of the rollers.
  • segments 270, b, c, a could have other shapes, for example that of a parabola or any pipe disengaging curved shape which is such that the pipe extends in a direction which progressively moves away from the circular path of movement of the rollers.
  • the segments 27 have such shape that the compression of the pipe 25 along an upstream segment 27 exactly compensates at each instant the volume released by the decompression of the pipe 25 along a downstream segment 27.
  • the pipe 25 is preferably manufactured to have a configuration identical to that described hereinbefore of the inner face or wall of the element 8 so that it remains in contact with this wall without stress.
  • the radius of the partcircular portions 26a, 26b measured between the center 9 and the face of the element 8 is such as to be equal to the distance between the center 9 and the axis of rotation ofa roller 19, plus the radius of a roller, plus the radial thickness of the pipe 25 when the latter is flattened, as clearly shown in FIG. 1.
  • the inner wall of the element 8 constitutes in this way a support ramp or face for the pipe 25.
  • FIGS. 2, 3 and 4 show in plan the rotor 13, an upstream roller 19b, an intermediate roller 19c and a downstream roller 19a, and the pipe 25, the direction of rotation of the rotor 13 being indicated by arrow F.
  • the downstream roller 19a has just travelled through the part-circular portion 26b in completely compressing the pipe 25 against the ramp and urging or expelling the fluid in front of it and is on the point of starting to move away from the pipe 25 and thus allowing the latter to be decompressed owing to the fact that the segment 27d is at this point tangent to the portion 26b and consequently extends in a direction away from the path of movement of the roller.
  • the upstream roller 19b has finished the pipe-compressing stage on a part of the segment 27a and travels through the part-circular portion 26a and causes closure of the pipe 25a throughout the extent of the portion 26a.
  • the progression of the upstream roller 19b along the portion 26a urges or expels the fluid in the downstream direction, this fluid being drawn in through the inlet portion 28 by the pipe 25 which resumes its shape.
  • the intermediate roller has just travelled through the part of its path facing the connecting portion 29 in which the pipe 25 is completely relieved of any compression and this roller is on the point of starting to compress the pipe 25 in the segment 270 which, as it is tangent to the portion 26b, extends in a direction toward the path of the rollers from the portion 29.
  • FIG. 5 shows the pipe 25 closed by the roller 19a in the position of the latter shown in FIG. 2.
  • the intermediate roller 190 in the semi-compression position compresses the pipe 25 as the downstream roller 19a decompresses it so that the increase in the internal volume of the pipe resulting from the fact that the downstream roller 19a moves away from the pipe in the tangent segment 27b is exactly compensated at every instant by an equal decrease in this volume resulting from the compression of the pipe by the intermediate roller 19c.
  • the upstream roller 19b travels along the part-circular portion 26a throughoutthe extent of which it closes the pipe and discharges the fluid in front of it.
  • FIG. 4 shows that the downstream roller 19a, in continuing to travel through its circular path, has ceased to FIG. 9, there is illustrated the pipe with inlet and outlets 28 and 28 respectively and having sinusoidal portions 26a and 26b.
  • the rollers 19a, 19b and 19c move in an elliptical path, each alternately moving compress the pipe 25 and is on the point of moving away from the latter (FIG. 7), the intermediate roller 19c being in its position for completely compressing the pipe 25 and closing the latter through the extent of its travel along the portion 26b and thus urging or expelling the fluid in front of it in a continuous manner until it reaches the junction of this portion with the tangent segment 27d.
  • the suction or induction of the fluid is ensured merely by the roller 190 during the period during which the rollers 19b and 19a do not close the pipe 25.
  • rollers 19a, b, c are driven in rotation by their gear pinions 22 meshed with the teeth of the ring 23, they roll along the pipe with no friction so that there is no wear of the latter and any tendency of the pipe to creep or move in the longitudinal direction is precluded.
  • this pump is particularly adapted for use in perfusion operations on patients.
  • the fixed configuration of the pipe can be a sinusoid and the rollers can travel through a closed path having a rectilinear active part or alternatively, the configuration of the pipe can be rectilinear and the rollers can travel through a closed path having a sinusoid active path.
  • FIG. 10 illustrates a rectilinear section of pipe 25 with the rollers 19a 19b, and moving in a sinusoidal path.
  • portions of the pipe corresponding to the inlet portion 28 and outlet portion 28 for the fluid can be transparent and a suitable device 30 for detecting particlescan be disposed on each side of these parts (FIG. 4) .
  • This device can be employed for controlling the pumped fluid and possibly stopping operation of the pump automatically in response to given conditions.
  • this arrangement is well known in the art and is not part of the pump and will not be described in detail.
  • the pump according to the invention can also be employed, for example, for maintaining a constant pressure in a reservoir which is filled irregularly, the pump emptying the reservoir and being controlled by the pressure prevailing in the latter.
  • a peristaltic pump comprising an elastically yieldable pipe having an inlet part and an outlet part for fluid to be pumped, means defining a support ramp in abutting relation to the pipe and imparting to the pipe a fixed configuration, at least three movable pressing elements, and drive means for causing the elements to travel around an axis in a closed path which encounters said configuration so as to compress the pipe and move away from the pipe alternately, the fixed configuration imparted to the pipe by the ramp, the path of said elements and spacing between said elements being such that when the element which is the downstream element relative to the direction in which the fluid is pumped through the pipe moves away from the pipe an upstream element already closes the pipe and causes the fluid to progress as the downstream element causes a decompression of the pipe, the intermediate element located between the upstream element and downstream element progressively compressing the pipe so as to ensure an exact volumetric compensation, at each instant, of the decompression due to the downstream element by the compression due to the intermediate element.
  • a peristaltic pump comprising an elastically yieldable pipe having an inlet end and an outlet end for fluid to be pumped, means defining a support ramp combined with the pipe and imparting to the pipe a fixed configuration, means defining a rotor rotatable about an axis and located within said support ramp, at least three rolling elements rotatably mounted on the rotor in angularly evenly spaced relation to each other, rotation of the rotor causing said elements to rotate about said axis in a closed 'path, the support ramp having a configuration comprising two part-circular portions which have the same center on said axis and the same radius and subtend an angle of substantially 60 on said axis, a curved connecting portion tangent to the part-circular portions and interconnecting the part-circular portions and in which connecting portion the pipe does not meet the path of said elements, an inlet portion and an outlet portion respectively adjacent said inlet part and outlet part of the pipe and tangent to the part-circular portions, the radius of the part-cir
  • a pump as claimed in claim 2 further comprising a fixed ring gear having internal gear teeth and a gear pinion integral with each rolling element and in meshed relation to said ring gear.
  • a pump as claimed in claim 6, comprising a shaft for driving the rotor and a unidirectional coupling device drivingly connecting the shaft to the rotor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • External Artificial Organs (AREA)
  • Reciprocating Pumps (AREA)
US00175129A 1970-08-28 1971-08-28 Peristaltic pump Expired - Lifetime US3724974A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7031474A FR2102904A5 (es) 1970-08-28 1970-08-28

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US3724974A true US3724974A (en) 1973-04-03

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US00175129A Expired - Lifetime US3724974A (en) 1970-08-28 1971-08-28 Peristaltic pump

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US (1) US3724974A (es)
DE (1) DE2142524A1 (es)
FR (1) FR2102904A5 (es)
GB (1) GB1353807A (es)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3826593A (en) * 1972-05-12 1974-07-30 Casimir W Von Pulsefree peristaltic pump and method of operating same
US4634305A (en) * 1983-06-13 1987-01-06 Montblanc-Simplo Gmbh Ink supply system for writing instruments which operate with liquid ink
US4923375A (en) * 1985-05-15 1990-05-08 Ejlersen Henning M Hose pump, in particular an insulin pump
DE3940730A1 (de) * 1989-12-09 1991-06-13 Sartorius Gmbh Peristaltische schlauchpumpe zum foerdern eines fluids
US5871341A (en) * 1996-12-31 1999-02-16 Melody; Brian J. Peristaltic pump driven pump roller apparatus and methodology
US6189736B1 (en) 1997-01-17 2001-02-20 Niagara Pump Corporation Condiment dispensing apparatus
US20040096347A1 (en) * 2002-11-18 2004-05-20 Pelmulder John P. Uniform flow displacement pump
WO2004100687A1 (en) * 2003-05-09 2004-11-25 Formax, Inc. Knockout cup for patty-forming machine
US20050047925A1 (en) * 2003-08-26 2005-03-03 Davis Jeremy A. Peristaltic pump and method with parking position
US20060245964A1 (en) * 2003-04-29 2006-11-02 Loren Hagen Pulseless peristaltic pump
US20070258829A1 (en) * 2006-04-21 2007-11-08 Bredel Hose Pumps B.V. Peristaltic pump
US20120294743A1 (en) * 2009-11-12 2012-11-22 Welco Co., Ltd. Tube pump and tube stabilizer
US8790096B2 (en) 2009-05-06 2014-07-29 Alcon Research, Ltd. Multiple segmented peristaltic pump and cassette
US9126219B2 (en) 2013-03-15 2015-09-08 Alcon Research, Ltd. Acoustic streaming fluid ejector
CN105422427A (zh) * 2014-09-19 2016-03-23 德昌电机(深圳)有限公司 医疗用蠕动泵
US9545337B2 (en) 2013-03-15 2017-01-17 Novartis Ag Acoustic streaming glaucoma drainage device
US9693896B2 (en) 2013-03-15 2017-07-04 Novartis Ag Systems and methods for ocular surgery
US9750638B2 (en) 2013-03-15 2017-09-05 Novartis Ag Systems and methods for ocular surgery
US9861522B2 (en) 2009-12-08 2018-01-09 Alcon Research, Ltd. Phacoemulsification hand piece with integrated aspiration pump
US9915274B2 (en) 2013-03-15 2018-03-13 Novartis Ag Acoustic pumps and systems
US9962288B2 (en) 2013-03-07 2018-05-08 Novartis Ag Active acoustic streaming in hand piece for occlusion surge mitigation
US10182940B2 (en) 2012-12-11 2019-01-22 Novartis Ag Phacoemulsification hand piece with integrated aspiration and irrigation pump

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008002761A1 (de) * 2008-01-31 2009-08-06 Fachhochschule Bielefeld Schlauchpumpe zur Förderung von Fluiden
CN105402109B (zh) * 2015-12-10 2018-01-09 威海威高血液净化制品有限公司 一种电机和蠕动泵的连接部件

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2909125A (en) * 1956-01-16 1959-10-20 Paul J Daniels Liquid dispensers
US2965041A (en) * 1956-05-16 1960-12-20 Clark Robert Edward David Rotary pump apparatus
US3366071A (en) * 1965-08-03 1968-01-30 Lkb Produckter Ab Peristaltic pump
US3447478A (en) * 1967-03-03 1969-06-03 Miles Lab Peristaltic pump

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2909125A (en) * 1956-01-16 1959-10-20 Paul J Daniels Liquid dispensers
US2965041A (en) * 1956-05-16 1960-12-20 Clark Robert Edward David Rotary pump apparatus
US3366071A (en) * 1965-08-03 1968-01-30 Lkb Produckter Ab Peristaltic pump
US3447478A (en) * 1967-03-03 1969-06-03 Miles Lab Peristaltic pump

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3826593A (en) * 1972-05-12 1974-07-30 Casimir W Von Pulsefree peristaltic pump and method of operating same
US4634305A (en) * 1983-06-13 1987-01-06 Montblanc-Simplo Gmbh Ink supply system for writing instruments which operate with liquid ink
US4923375A (en) * 1985-05-15 1990-05-08 Ejlersen Henning M Hose pump, in particular an insulin pump
DE3940730A1 (de) * 1989-12-09 1991-06-13 Sartorius Gmbh Peristaltische schlauchpumpe zum foerdern eines fluids
US5871341A (en) * 1996-12-31 1999-02-16 Melody; Brian J. Peristaltic pump driven pump roller apparatus and methodology
US6189736B1 (en) 1997-01-17 2001-02-20 Niagara Pump Corporation Condiment dispensing apparatus
US20040096347A1 (en) * 2002-11-18 2004-05-20 Pelmulder John P. Uniform flow displacement pump
CN100476207C (zh) * 2002-11-18 2009-04-08 国际遥距成象系统公司 均匀流动的容积式泵
WO2004046553A3 (en) * 2002-11-18 2005-07-28 Int Remote Imaging Systems Inc Uniform flow displacement pump
US7150607B2 (en) 2002-11-18 2006-12-19 International Remote Imaging Systems, Inc. Uniform flow displacement pump
US20070077158A1 (en) * 2002-11-18 2007-04-05 Pelmulder John P Uniform flow displacement pump
US7645127B2 (en) 2003-04-29 2010-01-12 Loren Hagen Pulseless peristaltic pump
US20060245964A1 (en) * 2003-04-29 2006-11-02 Loren Hagen Pulseless peristaltic pump
WO2004100687A1 (en) * 2003-05-09 2004-11-25 Formax, Inc. Knockout cup for patty-forming machine
US20050047925A1 (en) * 2003-08-26 2005-03-03 Davis Jeremy A. Peristaltic pump and method with parking position
US7104769B2 (en) * 2003-08-26 2006-09-12 Hewlett-Packard Development Company, L.P. Peristaltic pump and method with parking position
US8157547B2 (en) * 2006-04-21 2012-04-17 Bredel Hose Pumps B.V. Peristaltic pump with flow control
US20070258829A1 (en) * 2006-04-21 2007-11-08 Bredel Hose Pumps B.V. Peristaltic pump
US8790096B2 (en) 2009-05-06 2014-07-29 Alcon Research, Ltd. Multiple segmented peristaltic pump and cassette
US20120294743A1 (en) * 2009-11-12 2012-11-22 Welco Co., Ltd. Tube pump and tube stabilizer
US9175678B2 (en) 2009-11-12 2015-11-03 Welco Co., Ltd Tube pump and tube stabilizer
US9982667B2 (en) 2009-11-12 2018-05-29 Welco Co., Ltd. Tube pump and tube fixing member
US9366245B2 (en) * 2009-11-12 2016-06-14 Welco Co., Ltd. Tube pump and tube stabilizer
US9861522B2 (en) 2009-12-08 2018-01-09 Alcon Research, Ltd. Phacoemulsification hand piece with integrated aspiration pump
US10182940B2 (en) 2012-12-11 2019-01-22 Novartis Ag Phacoemulsification hand piece with integrated aspiration and irrigation pump
US9962288B2 (en) 2013-03-07 2018-05-08 Novartis Ag Active acoustic streaming in hand piece for occlusion surge mitigation
US9126219B2 (en) 2013-03-15 2015-09-08 Alcon Research, Ltd. Acoustic streaming fluid ejector
US9693896B2 (en) 2013-03-15 2017-07-04 Novartis Ag Systems and methods for ocular surgery
US9750638B2 (en) 2013-03-15 2017-09-05 Novartis Ag Systems and methods for ocular surgery
US9545337B2 (en) 2013-03-15 2017-01-17 Novartis Ag Acoustic streaming glaucoma drainage device
US9915274B2 (en) 2013-03-15 2018-03-13 Novartis Ag Acoustic pumps and systems
JP2016059817A (ja) * 2014-09-19 2016-04-25 ジョンソン エレクトリック ソシエテ アノニム 医用ペリスタポンプ
US20160082168A1 (en) * 2014-09-19 2016-03-24 Johnson Electric S.A. Medical Peristaltic Pump
US9999712B2 (en) * 2014-09-19 2018-06-19 Johnson Electric S.A. Medical peristaltic pump
CN105422427A (zh) * 2014-09-19 2016-03-23 德昌电机(深圳)有限公司 医疗用蠕动泵

Also Published As

Publication number Publication date
DE2142524A1 (de) 1972-03-02
FR2102904A5 (es) 1972-04-07
GB1353807A (en) 1974-05-22

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