US3826593A - Pulsefree peristaltic pump and method of operating same - Google Patents

Pulsefree peristaltic pump and method of operating same Download PDF

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Publication number
US3826593A
US3826593A US00359528A US35952873A US3826593A US 3826593 A US3826593 A US 3826593A US 00359528 A US00359528 A US 00359528A US 35952873 A US35952873 A US 35952873A US 3826593 A US3826593 A US 3826593A
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tube
pressure
point
fluid
roller
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US00359528A
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Casimir W Von
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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
    • 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
    • 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
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F04B11/005—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons
    • F04B11/0075—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons connected in series
    • 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

  • ABSTRACT In a peristaltic pump in which at least two impeller rollers move codirectionally along spaced-apart portions of a flexible tube with intermittent blocking of the flow at both portions simultaneously, the part of the tube upstream of the flow-blocking leading roller is placed under a pressure equaling that prevailing downstream of that roller just before the latter is lifted off the tube wall to give passage to a limited volume of the conveyed fluid.
  • the equalizing pressure may be exerted by a plungeror another codirectionally mov ing roller, or by intermittently driving a third roller upstream of the trailing roller at an increased speed with reference to the flow-blocking leading roller just before the intervention of the trailing roller.
  • my earlier system comprises a pusher member which engages the tube wall at a location downstream of the arcuate section contacted by the rollers and which is operated by the roller drive to constrict the tube with a partial blocking effect at the instant of disengagement of the leading or downstream roller from the tube.
  • This throttling of the tube outlet prevents the rise in delivery pressure which would otherwise occur at that instant as the upstream or trailing roller intervenes to impel an additional fluid volume through the operating zone; the added pressure generated at that stage is thereby stored so as to be available in a later part of the cycle.
  • the general object of my present invention is to provide a further improvement in systems of this type which avoids even the minor pressure variations of a peristaltic pump as described in my prior patent.
  • a related object is to provide a method of operating such a pump to maintain a steady discharge pressure.
  • the fluid to be conveyed is fed into the inlet end of a tube whose flexible wall is progressively deformed at an upstream point and a downstream point advancing toward the tube outlet in a series of recurrent strokes, as in the system of my prior U.S. Pat. No. 3,726,613, whereby a discharge pressureof predetermined magnitude is developed in the fluid between the downstream point and the outlet, this discharge pressure exceeding the supply pressure prevailing between the inlet and that point; by adjusting (e.g.
  • the first way involves the deformation of part of the tube wall between the two obstructed points during the confinement period; the second way is to force-feed additional fluid past the upstream point into the space between the two points immediately prior to the confinement period.
  • the pressure-control means may comprise a thrust member engageable with the flexible tube wall at an intermediate location between the two impeller-engaged points; such a thrust member could take the form of a plunger, similar to the pusher of my prior patent but disposed upstream rather than downstream of the engagement point of the leading roller, which moves substantially at right angles to the tube wall; in the case where the leading and trailing rollers sweep the same arcuate tube section, the thrust member could be a third roller mounted on an extension of the support of the other two rollers and subjected to radial displacement by suitable control means such as a stationary cam.
  • the pressure-control means may comprise a feed member such as a third roller engageable with the tube wall at a location upstream of both obstruction points, this feed member being timed to operate just before the tube is blocked by the trailing roller; the sweep of that third roller, while generally synchronized with that of the other two rollers, should be faster than that of the latter rollersin order to force additional fluid into the intervening space.
  • the elevated pressure is generated by the compressibility of the conveyed fluid and/or by the elastic expansibility of the tube wall.
  • FIG. 1 is a somewhat diagrammatic view of a peristaltic pump according to the present invention
  • FIG. 2 is a set of graphs serving to explain the operation of the pump of FIG. 1;
  • FIG. 3 is a view similar to part of FIG. 1, showing a modification
  • FIG. 4 is a set of graphs relating to the operation of the pump of FIG. 3;
  • FIG. 5 is another set of graphs serving to explain an alternate mode of operation of the system of FIG. 1;
  • FIG. 6 shows details of a cam drive forming part of the pump of FIG. 1.
  • FIG. 1 in which I have shown a peristaltic pump generally similar to that disclosed in my US. Pat. No. 3,726,613.
  • the pump comprises a housing 1 containing a flexible and preferably elastic tube 2 with an inlet section 2a and an outlet section 2b.
  • the tube is curved through an arc of 90 about the axis of a shaft 8; at 2d it extends over slightly more than 180 along an are centered on the axis of a shaft 7 parallel to shaft 8.
  • Two rollers 3 and 4 are carried on opposite ends of a supporting arm 21 secured to shaft 7 and driven counterclockwise (arrow A) with the aid of a motor 20 through a transmission 22 which correlates the speed of this arm with that of a further arm 23, keyed to shaft 8 and rotating also counterclockwise (arrow B), as well as to that of a rotating cam 16 on a shaft 9.
  • Arm 23 supports a third roller 6 sweeping the tube section 20. In the position illustrated in FIG.
  • rollers 3 and 4 simultaneously obstruct the downstream tube portion 2d at diametrically opposite points P, Q whereas roller 6 obstructs the upstream tube portion 20 at a point R; these points of engagement move codirectionally during each cycle, i.e., during each half-turn of shaft 7, in the flow direction frominlet section'2a to outlet section 2b.
  • plunger constricts the tube section 2e during a confinement period in which the flow is blocked simultaneously at points R and P; the extent of this constriction is so chosen that, without cutting off the flow through section 2e, the fluid pressure in that section is raised to the level of the discharge pressure prevailing in the outlet section 21) downstream of point P.
  • plunger 5 may be omitted.
  • cam 16 bears upon a lever 19 which is provided on a fulcrum and has an arcuate slot 10 receiving a hook 11 on a screw-threaded sleeve 14 which forms an adjustable linkage with a mating bolt 13 hinged at 12 to the stem of plunger 5.
  • Relative rotation of bolt 13 and sleeve 14 varies the extreme position of plunger 5 whereas displacement of hook 11 along slot 10 modifies its stroke; the hook may be immobilized on lever 19 in a selected position by wing nut or other nonillustrated fastening means.
  • FIG. 2 diagrammatically showing part of the tube 2, particularly its sections 21;- 2e, in developed form.
  • Graph (a) depicts a stage in a cycle in which the point of engagement P of roller 3 with tube portion 2d is approximately at the lower vertex of that portion, with roller 4 disengaged and with roller 6 just beginning to engage the tube portion plunger 5 is retracted, possibly with the aid of a restoring spring or the like supplementing the elasticity of the tube.
  • the three rollers 3, 4 and 6 move at the same longitudinal speed along the tube wall, graph (b) marking the beginning of a confinement period during which the fluid is trapped in sections 2d and 2e between the downstream point P and the upstream point R.
  • the transmission 22 controls the relative speed of rotation of shafts 7 and 8 in such a way that roller 6 performs a full revolution for each half-revolution of rollers 3 and 4; with the orbital radius of roller 6 (measured along its point remotest from shaft 8) half that of rollers 3 and 4, the two arms 21 and 23 are driven with the same angular velocity. If the number of rollers entrained by shaft 7 were increased, eg to three rollers spaced apart, the arc length of tube portion 2d could be shortened; the angular velocity of roller arm 23 would, of course, have to be correspondingly adjusted in such a case.
  • FIG. 5 shows a mode of operation in which arm 23, during the time of engagement of roller 6 with tube section 20, is accelerated so that point R advances at a faster rate than points P and Q. Since arm 23 must again complete. two revolutions for every revolution of arm 21, this acceleration may also be realized by doubling the length of arm 23 (thus making it equal to each half of arm 21) and driving its shaft 8 at twice the speed of shaft 7.
  • roller 6 sweeps additional fluid past the as yet unobstructed upstream point Q into tube section 2d just before the latter is blocked at both ends during a brief confinement period represented by the sixth and seventh graphs of this FIGURE.
  • the bottom graph indicates the release of the confined fluid by the lifting of roller 3, again with no appreciable change in discharge pressure because of the pressure equalization on opposite sides of downstream point P.
  • FIG. 3 I have shown a tube 2' with an inlet section 2a, an outlet section 2b and a semicircular portion 2d swept by rollers 3, 4 on a cruciform support 21' keyed to shaft 7.
  • Support 21 also carries a pair or ancillary rollers 17 and 18 whose shafts 25, 26 are radially slidable in slots 27, 28 of the support.
  • a stationary cam 29, which may be duplicated on opposite sides of the roller support, coacts with projecting ends of shafts 25 and 26 to urge the rollers 17 and 18 radially outwardly at the vertex of the arcuate tube portion 2d so as to constrict the tube at a location between the downstream obstruction point P and the upstream obstruction point O.
  • FIG. 4 shows the position of rollers 3, 4 and 17 during a fraction of a revolution of shaft 7, with the second and third graphs (counting from above) representing the confinement period.
  • the operation of this system is thus generally similar to that described with reference to FIGS. 1 and 2.
  • the mode of operation discussed with reference to FIGS. 1 and 5 could be carried out with two rollers instead of three if, with roller 6 omitted, the angular spacing of the two co-orbital rollers 3 and 4 were made variable so that the trailing roller could be accelerated (orretarded) with reference to the leading roller during the confinement period.
  • trailing roller 4 might reach the central position 90 behind leading roller 3 (i.e., the position of roller 17 in FIG. 3) when the latter is in the terminal position illustrated in FIG.
  • roller 4 would then advance through 90 into the leading position of roller 3, at the normal pumping speed v, while roller 3 (trailing) swings through 270 into the central or nadir position at speed 3v. Now the speed ratio is again reversed, with roller 3 (leading) covering the final 90of its sweep at speed v whereas roller 4 (trailing) moves at three times that speed to the central position it occupied two cycles earlier.
  • the pressure-control means according to my invention would be included in transmission 22 which would have to be designed to vary the roller speeds in the manner described.
  • a peristalticpump comprising:
  • a tube provided with a flexible wall having an inlet for a fluid to be conveyed, an outlet for said fluid and 6 m a series of recurrent operating cycles by obstructing said tube at a first point progressing in the flow direction;
  • trailing impeller means mounted on said first support for intermittent engagement with said upstream portion for deforming the wall thereof to control the advance of said fluid toward said outlet by completely obstructing said tube at a second point progressing in the flow direction, the obstruction of the tube at said points coinciding during a confinement period of each operating cycle terminating with the unblocking of the tube at said first point, at leastone of said impeller means being effective to block the tube at any time;
  • a pump as defined in claim 1 wherein said pressure-control means comprises a thrust memberunder the control of said drive means engageable with the tube wall at a location between said points for partially obstructing the fluid flow at said location during said confinement period.
  • a pump as defined in claim 2 wherein saidupstream and downstream portions have a common center of curvature and merge into a. single arc, said supports being integral with each other, said thrust member being mounted on an extension of said supports for codirectional movement with said leading and trailing impeller means.
  • leading and trailing impeller means comprise a pair of rollers, said thrust member being a further roller provided with control means for radially displacing same during a sweep past said location.
  • a pump as defined in claim 1 wherein said pressure-controlmeans comprises a feed member under the control of said drive means engageable with the tube wall at a location upstream of said second point for forcing an increased quantity of fluid past said upstream portion in a part of each cycle immediately preceding said confinement period.
  • leading and trailing impeller means include a pair of rollers and said flexible wall forms a further arcuately curved portion at a further upstream location
  • said feed member comprising a third support rotatable by said drive means about the center of curvature of said further portion and a third roller on said third support engageable with said further portion during said part of each cycle for deforrning'the wall thereof at a third point progressing in the flow direction.
  • a method of delivering a continuous fluid flow substantially free from pulsations comprising the steps of:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
US00359528A 1972-05-12 1973-05-11 Pulsefree peristaltic pump and method of operating same Expired - Lifetime US3826593A (en)

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Application Number Priority Date Filing Date Title
DE19722223354 DE2223354A1 (de) 1972-05-12 1972-05-12 Verfahren und vorrichtung zur glaettung der foerderleistung von schlauchpumpen

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US (1) US3826593A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS4949204A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH568483A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2223354A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2199812A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1433251A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2703163A1 (de) * 1976-01-26 1977-07-28 Baxter Travenol Lab Verfahren und vorrichtung fuer die infusion einer fluessigkeit aus einem behaelter in den menschlichen koerper
US4210138A (en) * 1977-12-02 1980-07-01 Baxter Travenol Laboratories, Inc. Metering apparatus for a fluid infusion system with flow control station
WO1981001656A1 (en) * 1979-12-13 1981-06-25 Baxter Travenol Lab Method and apparatus for metered infusion of fluids
US4648812A (en) * 1980-02-12 1987-03-10 Terumo Corporation Method and apparatus for preventing pulsations
US5222880A (en) * 1991-10-11 1993-06-29 The Regents Of The University Of Michigan Self-regulating blood pump
US5281112A (en) * 1992-02-25 1994-01-25 The Regents Of The University Of Michigan Self regulating blood pump with controlled suction
US5492451A (en) * 1994-10-03 1996-02-20 Caterpillar Inc. Apparatus and method for attenuation of fluid-borne noise
US5588805A (en) * 1995-08-28 1996-12-31 Sauer Inc. Vibration and pressure attenuator for hydraulic units
US5595476A (en) * 1996-02-23 1997-01-21 Alliedsignal Inc. Pump shaft driven inlet and outlet radial pin arrangement for reducing fluid ripple
US5963227A (en) * 1989-05-18 1999-10-05 Canon Kabushiki Kaisha Ink jet recording apparatus
WO2002070896A1 (fr) * 2001-02-28 2002-09-12 Cofido S.A. Dispositif de dosage de fluide a flux continu
US20060245964A1 (en) * 2003-04-29 2006-11-02 Loren Hagen Pulseless peristaltic pump
US20130189120A1 (en) * 2008-11-10 2013-07-25 Curlin Medical Inc. Method and apparatus for a peristaltic pump
WO2015084676A1 (en) 2013-12-04 2015-06-11 Iris International, Inc. Flow cytometer
EP3017836A1 (en) 2014-11-04 2016-05-11 Micrel Medical Devices S.A. Pulseless rotary peristaltic pump
EP3206010A1 (en) 2012-05-30 2017-08-16 Iris International, Inc. Flow cytometer
US9746412B2 (en) 2012-05-30 2017-08-29 Iris International, Inc. Flow cytometer
US20190010189A1 (en) * 2016-01-07 2019-01-10 Fujifilm Diosynth Biotechnologies Uk Limited Tangential Flow Filtration Process for Concentrating Biomolecule Solutions
US10528064B2 (en) * 2016-09-14 2020-01-07 Surpass Industry Co., Ltd. Tube pump system and method for controlling the tube pump system
US11035355B2 (en) 2018-03-19 2021-06-15 Surpass Industry Co., Ltd. Tube pump system and method for controlling the tube pump system
US11439956B2 (en) 2016-01-07 2022-09-13 Fujifilm Diosynth Biotechnologies Uk Limited Method for processing solutions of biomolecules
US11542937B2 (en) 2019-02-15 2023-01-03 Surpass Industry Co., Ltd. Tube pump system and method for controlling the tube pump system
US20240018963A1 (en) * 2020-11-27 2024-01-18 Paddlemover Llc Material Mover
US12018670B2 (en) 2020-05-26 2024-06-25 Surpass Industry Co., Ltd. Tube pump system
US12025117B2 (en) 2020-05-26 2024-07-02 Surpass Industry Co., Ltd. Tube holding member and tube pump
US12221956B2 (en) 2020-01-31 2025-02-11 Surpass Industry Co., Ltd. Tube pump

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2499636B1 (fr) * 1981-02-09 1985-10-11 Gillard Patrick Distributeur doseur multiple
AU1139583A (en) * 1982-02-25 1983-09-01 John T. Broadfoot Peristaltic pump
US4529106A (en) * 1982-09-02 1985-07-16 Broadfoot John T Metering and/or feeding unit for fluid materials
JPS63302190A (ja) * 1987-05-30 1988-12-09 Okasan Kiko Kk 微少脈動のモルタル等用ポンプ
DE3940730A1 (de) * 1989-12-09 1991-06-13 Sartorius Gmbh Peristaltische schlauchpumpe zum foerdern eines fluids
CN103696951A (zh) * 2013-12-02 2014-04-02 北京机械设备研究所 一种输送真空环境下流体的蠕动泵
CN109331236B (zh) * 2018-09-28 2019-12-13 彭阳 智能医用引流器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2804023A (en) * 1954-11-29 1957-08-27 Mr Robot Inc Pump
US3724974A (en) * 1970-08-28 1973-04-03 Logeais Labor Jacques Peristaltic pump
US3726613A (en) * 1970-10-12 1973-04-10 Casimir W Von Pulsefree peristaltic pump
US3758239A (en) * 1970-12-23 1973-09-11 Ceskoslovenska Akademie Ved Controlled peristaltic pump

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2804023A (en) * 1954-11-29 1957-08-27 Mr Robot Inc Pump
US3724974A (en) * 1970-08-28 1973-04-03 Logeais Labor Jacques Peristaltic pump
US3726613A (en) * 1970-10-12 1973-04-10 Casimir W Von Pulsefree peristaltic pump
US3758239A (en) * 1970-12-23 1973-09-11 Ceskoslovenska Akademie Ved Controlled peristaltic pump

Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2703163A1 (de) * 1976-01-26 1977-07-28 Baxter Travenol Lab Verfahren und vorrichtung fuer die infusion einer fluessigkeit aus einem behaelter in den menschlichen koerper
US4210138A (en) * 1977-12-02 1980-07-01 Baxter Travenol Laboratories, Inc. Metering apparatus for a fluid infusion system with flow control station
WO1981001656A1 (en) * 1979-12-13 1981-06-25 Baxter Travenol Lab Method and apparatus for metered infusion of fluids
US4648812A (en) * 1980-02-12 1987-03-10 Terumo Corporation Method and apparatus for preventing pulsations
US5963227A (en) * 1989-05-18 1999-10-05 Canon Kabushiki Kaisha Ink jet recording apparatus
US5222880A (en) * 1991-10-11 1993-06-29 The Regents Of The University Of Michigan Self-regulating blood pump
US5281112A (en) * 1992-02-25 1994-01-25 The Regents Of The University Of Michigan Self regulating blood pump with controlled suction
US5492451A (en) * 1994-10-03 1996-02-20 Caterpillar Inc. Apparatus and method for attenuation of fluid-borne noise
US5588805A (en) * 1995-08-28 1996-12-31 Sauer Inc. Vibration and pressure attenuator for hydraulic units
US5595476A (en) * 1996-02-23 1997-01-21 Alliedsignal Inc. Pump shaft driven inlet and outlet radial pin arrangement for reducing fluid ripple
WO2002070896A1 (fr) * 2001-02-28 2002-09-12 Cofido S.A. Dispositif de dosage de fluide a flux continu
US20060245964A1 (en) * 2003-04-29 2006-11-02 Loren Hagen Pulseless peristaltic pump
US7645127B2 (en) 2003-04-29 2010-01-12 Loren Hagen Pulseless peristaltic pump
US20130189120A1 (en) * 2008-11-10 2013-07-25 Curlin Medical Inc. Method and apparatus for a peristaltic pump
US8864474B2 (en) * 2008-11-10 2014-10-21 Curlin Medical Inc. Method and apparatus for a peristaltic pump
US10126227B2 (en) 2012-05-30 2018-11-13 Iris International, Inc. Flow cytometer
US11255772B2 (en) 2012-05-30 2022-02-22 Iris International, Inc. Flow cytometer
EP3206010A1 (en) 2012-05-30 2017-08-16 Iris International, Inc. Flow cytometer
US9746412B2 (en) 2012-05-30 2017-08-29 Iris International, Inc. Flow cytometer
US12174106B2 (en) 2012-05-30 2024-12-24 Beckman Coulter, Inc. Flow cytometer
US12174107B1 (en) 2012-05-30 2024-12-24 Beckman Coulter, Inc. Flow cytometer
EP4332547A2 (en) 2012-05-30 2024-03-06 Iris International, Inc. Flow cytometer
US10209174B2 (en) 2012-05-30 2019-02-19 Iris International, Inc. Flow cytometer
US10330582B2 (en) 2012-05-30 2019-06-25 Iris International, Inc. Flow cytometer
US11703443B2 (en) 2012-05-30 2023-07-18 Iris International, Inc. Flow cytometer
WO2015084676A1 (en) 2013-12-04 2015-06-11 Iris International, Inc. Flow cytometer
EP3017836A1 (en) 2014-11-04 2016-05-11 Micrel Medical Devices S.A. Pulseless rotary peristaltic pump
US10100824B2 (en) 2014-11-04 2018-10-16 Micrel Medical Devices S.A. Pulseless rotary peristaltic pump
US11685765B2 (en) * 2016-01-07 2023-06-27 Fujifilm Diosynth Biotechnologies Uk Limited Tangential flow filtration process for concentrating biomolecule solutions
US11439956B2 (en) 2016-01-07 2022-09-13 Fujifilm Diosynth Biotechnologies Uk Limited Method for processing solutions of biomolecules
US10934325B2 (en) * 2016-01-07 2021-03-02 Fujifilm Diosynth Biotechnologies Uk Limited Tangential flow filtration process for concentrating biomolecule solutions
US20190010189A1 (en) * 2016-01-07 2019-01-10 Fujifilm Diosynth Biotechnologies Uk Limited Tangential Flow Filtration Process for Concentrating Biomolecule Solutions
US20210163530A1 (en) * 2016-01-07 2021-06-03 Fujifilm Diosynth Biotechnologies Uk Limited Tangential Flow Filtration Process for Concentrating Biomolecule Solutions
US10528064B2 (en) * 2016-09-14 2020-01-07 Surpass Industry Co., Ltd. Tube pump system and method for controlling the tube pump system
US11035355B2 (en) 2018-03-19 2021-06-15 Surpass Industry Co., Ltd. Tube pump system and method for controlling the tube pump system
US11542937B2 (en) 2019-02-15 2023-01-03 Surpass Industry Co., Ltd. Tube pump system and method for controlling the tube pump system
US12221956B2 (en) 2020-01-31 2025-02-11 Surpass Industry Co., Ltd. Tube pump
US12018670B2 (en) 2020-05-26 2024-06-25 Surpass Industry Co., Ltd. Tube pump system
US12025117B2 (en) 2020-05-26 2024-07-02 Surpass Industry Co., Ltd. Tube holding member and tube pump
US20240018963A1 (en) * 2020-11-27 2024-01-18 Paddlemover Llc Material Mover

Also Published As

Publication number Publication date
FR2199812A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-04-12
CH568483A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1975-10-31
GB1433251A (en) 1976-04-22
DE2223354A1 (de) 1973-11-29
JPS4949204A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-05-13

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