US3740173A - Peristaltic pump - Google Patents

Peristaltic pump Download PDF

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Publication number
US3740173A
US3740173A US00181052A US3740173DA US3740173A US 3740173 A US3740173 A US 3740173A US 00181052 A US00181052 A US 00181052A US 3740173D A US3740173D A US 3740173DA US 3740173 A US3740173 A US 3740173A
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United States
Prior art keywords
press plate
tubing
rollers
drum
rotor member
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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.)
Expired - Lifetime
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US00181052A
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English (en)
Inventor
S Natelson
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Rohe Scientific Corp
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Rohe Scientific Corp
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Publication date
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Publication of US3740173A publication Critical patent/US3740173A/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00Machines, pumps, or pumping installations having flexible working members
    • F04B43/12Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/1253Machines, 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
    • F04B43/1284Means for pushing the backing-plate against the tubular flexible member
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00Machines, pumps, or pumping installations having flexible working members
    • F04B43/12Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/1253Machines, 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
    • F04B43/1292Pumps specially adapted for several tubular flexible members

Definitions

  • the press plate has at least two longitudinal ridges normal to the drum rollers to prevent said drum rollers from pressing the tubing beyond its elastic limit.
  • roller milking the tubing move on a horizontal plane. It is rnore economical to build the rollers as part of a wheel, like a squirrel cage. A motor can then drive this wheel with the mounted rollers at constant speed.
  • rollers It is almost impossible for rollers to be disposed in a perfect circle.
  • the surface on which the tube rests, and over which the roller rolls must also be a perfect circle.
  • the surface and the rollers need to be aligned so that the tubing is not caused to be distorted sideways.
  • the pressure on the tubing needs to be constant at all times and not vary during the running of the rollers over the tubing.
  • the operator must automatically be able to set to the same pressure as in the previous run if results are to be duplicated.
  • the present invention solves these problems in a simple fashion, so that an inexpensive pump can be built at a low cost which will operate on as many tubes, simultaneously, as desired (e.g. 3O tubes) keeping a constant flow continuously, over extended periods of time
  • a roller drum is made to engage a curved press plate, said roller drum acting on tubing passing between the drum rollers and the press plate.
  • the press plate has at least two longitudinal ridges normal to the drum rollers to prevent said drum rollers from pressing the tubing beyond its elastic Iirnit.
  • a guide and resilient means are applied to the press plate allowing the press plate freedom of movement in all possible directions, thus permitting the press plate to adjust to the configuration of the tubing.
  • FIG. 1 presents an overall perspective view of one version of the assembled pump
  • FIG. 2 shows a view of the pump from the side opposite to FIG. 1 with the cover removed so that the rollers can be seen in place on the rotor shaft; the tubing is also in place, held in plastic plates with grooves;
  • FIG. 3 depicts the rotor with the rollers disposed in a circular mode so that they revolve with the rotor shaft and can also rotate on their axles as they move across the tubing;
  • FIG. 4 illustrates the pump press plate from the top
  • FIG. 5 is a view of the press plate from the bottom
  • FIG. 6 shows the plastic supports and the mechanism for mounting the supports on the pump housing
  • FIG. 6a shows a perspective view of one of the crosspieces used herein when turned upside down.
  • FIG. 6b is a cross-sectional of the tubing in the press plate of the pump being squeezed by a roller;
  • FIG. 7 shows how a spring loaded flexible belting is disposed over the rollers to even out the pressure to the tubes being milked.
  • the pump 10 which includes a frame or housing shown as a rectangular box 12.
  • the pump 10 will act on plastic tubing 14 which is held in plastic tubing support 16.
  • Plastic tubing support 16 consists of rectangular plastic pieces which extend along both ends of the top of box 12.
  • Tubing support 16 has horizontal grooves 18 the tubing 14 passing along these grooves.
  • the plastic tubing 14 extends across the top of box 12 and passes out of the tubing support.
  • Plastic or rubber stops 20 hold the tubing in place.
  • a metal crosspiece 22 Disposed over the plastic tube support 16 is a metal crosspiece 22. This metal crosspiece goes over the ends of the box and its size corresponds to that of the plastic support.
  • metal supports 24 are metal supports 24.
  • metal supports extend parallelto the sides of the box and extend between the two metal crosspieces.
  • the metal crosspieces 22 and the metal supports 24 are threaded rods26 at the four corners of the box.
  • the plastic tube support, metal crosspieces and metal supports have apertures 26a corresponding to the location of these threaded rods.
  • These components are held fast by wing nuts 28.
  • Over the center of the box is a center crosspiece 30 held by a metal rod 32 withv a flat top 34.
  • FIG. 2 the cover of box 12 is removed and one of the sides with the input shaft 36 is rendered transparent. Also, the plastic tube support 16 is shown with grooves 18 to hold the plastic tubing.
  • a drum 44 mounted on drive shaft 36. Around the periphery of drum 44 are a plurality of rollers 46 disposed parallel to the cylindrical axis of the drum.
  • the tubing 14 is curved over the rollers and the action of the rollers 46 on the tubing 14 defines a pressing zone.
  • Drum 44 is best seen in FIG. 3, and consists of two end plates 48 holding rollers 46, with the main shaft 36 passing axially through the drum, the end plates are rigidly attached to the shaft. At both ends of the main shaft 36 are bearing assemblies 40.
  • bearing assemblies are for roller bearings 50. But, beside the conventional outer and inner races, there is a flexible rubber center 52. This rubber or resilient center is very important for reasons which will be apparent shortly.
  • the drive sprocket 38 is in turn driven by a chain 54, and a motor 56 driving a sprocket 58.
  • a press plate 60 Disposed over the tubes, as shown in FIGS. 4 and 5, is a press plate 60.
  • This press plate 60 is a section of a cylinder and will hold the tubes against the rollers.
  • the metal support 24 held by crosspieces 22.
  • center crosspiece 30 shown transparent to explain the construction. Passing through the press plate are vertical metal rods 32 with a flat head 34. Under the center crosspiece 30 on these rods, between the metal support 24 and the press plate 60 are springs 62. Rods 32 pass through both the center crosspiece 30 and the metal support 24 through apertures 64. These apertures 64 are quite wide allowing considerable lateral movement of the rods 32.
  • the press plate from the underside as shown in FIG. 5, there is a ridge 66 about 3/64 inch along the sides and across the center of the press plate extending downwards. This ridge is parallel to the direction in which the tubing .will pass.
  • FIGS. 6 and 6a The placing of the tubing in the pump will be apparent from FIGS. 6 and 6a.
  • the tubing 14 is stretched across the box'and the plastic tube supports 16 are placed over the tubing.
  • These tube supports 16 have slots or grooves 18, best seen in FIG. 6a.
  • FIG. 7 illustrates an attachment which serves to decrease the wear on the tubing carrying the specimen and allows a smoother action of the pump.
  • 70 is a 3/64 inch thick sheet of high speed belting. The rough side faces the rollers and the smooth side is on top. This belting wraps around the rotor and is supported on the base of the pump housing by springs 71. As the drum 44 turns, the rollers 46 are made to rotate on their axes by contact with belting 70. When the pump is assembled as shown in FIG. 1, the tubing will be compressed between the belting and floating head. As the drum rotates the rollers traverse to the underside of the belting, lifting it and thus progressively applying pressure to the tubes causing a smooth peristaltic action. In this version the wear is taken mostly by the durable high speed belting, thus increasing the life of the tubes.
  • the fundamental concept behind the present invention is that the press plate 60 will float over the tubing. After lengthy studies of the causes of pumping difficulties with peristaltic pumps, it was found that the press plate must constantly adjust to the tubing and must therefore float over the tubing. For this reason, apertures 26a for the'end crosspieces, and aperture 64 for rod 32 at the center crosspiece, are quite wide allowing for considerable forward, backward, and lateral movement of the press plate. Furthermore, the ball bearing assembly 40 has a rubber resilient center 52, which also allows considerable movement of the drum when pressing the press plate against the tubing. To enhance the floating effect the press plate over the tubing is spring loaded by springs 62 and floats freely so that it can adjust, in three dimensions to the vagaries of the squirrel cage wheel.
  • the press plate over the tubes is recessed exactly 3/64 of an inch so that the tubes can be compressed with this thickness as a limit. This prevents the pressure on the tubes beyond their elastic limit and assures a long life of constant delivery from these tubes.
  • the wall thickness of the tubing used is 3/64 inch so that the two walls together make 6/64 inch.
  • the design of the cover and the instrument in general is simple so that its total cost is very inexpensive,and this includes a 30 r.p.m. motor with a brake, capable of delivering pounds per square inch pressure. This is shown in FIG. 6 b, showing the press plate 60 with the ridge 66 and the tubing 14 in cross-section; The roller cannot compress the tubing past the3/64 inch ridge.
  • the speed of the rotor is determined by the r.p.m. of the motor and the ratio of the teeth on the sprocket of the rotor and the motor. Speed may be changed by changing the motor speed or the teeth ratio of the sprockets. This can be seen in FIG. 3. It will also be noted in FIG. 3 that the rotor shaft is disposed on a ball bearing support so that it rotates smoothly but is also supported on the semi-hard rubber center support so that it has some give to it when pressure is applied to the rotor.
  • the press plate When the motor is turned on, the press plate is seen to rock gently as it takes up irregularities of the rotor, it also swivels laterally. Thus, the rotor floats while being spring loaded, correcting for the lack of alignment and circularity of the rotor.
  • the tubing needs to be at right angles to both the rotor and the press plate. Any error in the location of the press plate relative to the rotor in this regard is automatically corrected as the press plate takes the position of least resistance.
  • the tubes are pressed gently but never mashed because of the protection the ridges (3/64 inch) provide. Thus the plastic tubes are compressed but not pressed to the point beyond their elastic limit.
  • the press plate is shown tightened down with wing nuts.
  • the support of the press plate is fitted on the end with clamps similar to those which close a valise or travel trunk.
  • the press plate support is then placed on the pump, and the four rods mounted on the housing are slipped through the holes at the end as a guide.
  • the clamps are then tightened down on catches on the housing as one closes a valise or travel trunk for a quick connect or disconnect, if one should so desire.
  • this invention solves a problem which has been under study for many years, namely, how to make a rotary peristaltic pump for a plurality of tubes which will maintain constant flow in each tube. It does this by the application of two new ideas.
  • press plate allows the press plate to float, under constant pressure in any of the three dimensions. It can move up, down or sway from side to side during the running of the pump, maintaining constant pressure on the tubes at all times. At all times the press plate assumes the position of least resistance.
  • the rotor rides on ball bearing supported in stiff, but flexible rubber. This permits the rotor to also move slightly in any direction so as to aid in assuming a position of least friction with the press plate and aid the press plate in taking the proper position with respect to the rollers.
  • the present invention provides for a peristaltic pump for delivering measured and constant amounts of liquid per unit of time from a plurality of containers through a plurality of flexible tubes which are stretched between two supports. This is accomplished by means of rollers circularly disposed around a circular drum rotor, the flexible tubes being disposed over, in contact, and at right angle to the rollers which are mounted so that they may rotate due to the friction as they slide across the flexible tubes.
  • the rotor is supported on an axle which is in turn supported by two bearings with flexible central support, e.g., rubber, so that it can revolve smoothly on the shaft.
  • the drum rotor being made to revolve at constant speed by means of a motor drive.
  • a press plate in the shape of a portion of a hollow cylinder is made to press on the flexible tubes and thus on the rollers by springs held in place by a rigid support in such a manner that the press plate may have the capability of some movement in any direction.
  • the press plate is countersunk on the concave side to provide ridges of somewhat lesser height than the combined thickness of opposite walls of the flexible tubing so that the flexible tubing will be closed by the rollers but never compressed beyond its elastic limit.
  • the rollers pass over the flexible tubing successively, to drive the liquid in the flexible tubes in the same direction as the motion of the rotor, the press plate assuming different positions so as to conform to variations in the height and position of said rollers, resulting in an even and constant flow of liquid in each of the flexible tubes.
  • a belting suitable for this purpose is conventional high speed belting, 3/64 inch thickness, which is smooth on the side contacting the tubing and rougher on the rotor side.
  • the rollers are induced to rotate by the belting, which takes the wear, and not the tubing. For this reason the tubing is not stretched forward to a great extent which also increases its life span.
  • a peristaltic pump comprising in combination:
  • a drum rotor member with a central drive shaft to drive said drum rotor member disposed between said tube supports, the drive shaft being disposed normal to tubing extending between said tube supports, with rollers disposed around the periphery of said drum rotor member parallel to said drive shaft so as to engage tubing extending between said tube supports, also bearing assemblies including a flexible inner center disposed in said housing to support said drive shaft for rotation;
  • a floating arcuate press plate said press plate forming a section of a cylinder whose axis somewhat coincides with said drum axis, the concave side of said press plate being disposed over said drum rotor member and generally conforming to the curvature of said drum rotor member, said press plate serving to hold tubing against said rollers, said press plate having at least two arcuate longitudinal ridges parallel to tubing extending between said tube supports, said ridges preventing the tubing from being pressed beyond its elastic limits; and,
  • a pump as claimed in claim 1 said ridges being substantially along the press plate edges.
  • a pump as claimed in claim 1 wherein said loose connecting means comprises at least one large opening in said support means, at least one thin connecting rod extending from said press plate side other than said concave side through said opening for substantial up and down and side to side movement therein, and, said resilient means being between said press plate other side and said extended support means.
  • a peristaltic pump as claimed in claim 1 including a frame, a flexible sheet of material covering said drum rollers so disposed as to be between said drum rollers and tubing acted upon by said drum rollers, and resilient means fastened to said frame holding said sheet over said drum rollers.
  • a peristaltic pump comprising in combination:
  • a drum rotor member with a central drive shaft to drive said drum rotor member disposed between said tube supports, the drive shaft being disposed normal to tubing extending between said tube supports, with rollers disposed around the periphery of said drum rotor member parallel to said drive shaft so as to engage tubing extending between said tube supports, also bearing assemblies including a flexible inner center disposed in said housing to support said drive shaft for rotation;
  • a floating arcuate press plate said press plate forming a section of a cylinder whose axis somewhat coincides with said drum axis, the concave side of said press plate being disposed over said drum rotor member and generally conforming to the curvature of said drum rotor member, said press plate serving to hold tubing against said rollers;
  • a peristaltic pump comprising in combination:
  • a drum rotor member with a central drive shaft to drive said drum rotor member disposed between said tube supports, the drive shaft being disposed normal to tubing extending between said tube supports, with rollers disposed around the periphery of said drum rotor member parallel to said drive shaft so as to engage tubing extending between said tube supports, also bearing assemblies disposed in said housing to support said drive shaft for rotation;
  • a floating arcuate press plate said press plate forming a section of a cylinder whose axis somewhat coincides with said drum axis, the concave side of said press plate being disposed over said drum rotor member and generally conforming to the curvature of said drum rotor member, said press plate serving to hold tubing against said rollers;

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
US00181052A 1971-09-16 1971-09-16 Peristaltic pump Expired - Lifetime US3740173A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US18105271A 1971-09-16 1971-09-16

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US3740173A true US3740173A (en) 1973-06-19

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US00181052A Expired - Lifetime US3740173A (en) 1971-09-16 1971-09-16 Peristaltic pump

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US (1) US3740173A (de)
JP (1) JPS4947914A (de)
BE (1) BE788703A (de)
CH (1) CH544222A (de)
DE (1) DE2245356A1 (de)
FR (1) FR2154080A5 (de)
GB (1) GB1383858A (de)
IT (1) IT967502B (de)
NL (1) NL7212071A (de)

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3809498A (en) * 1972-12-15 1974-05-07 R Lewis Closed wound suction system
US3837433A (en) * 1973-03-05 1974-09-24 Roper Corp Lubricating system for chain saw
US4181476A (en) * 1977-09-19 1980-01-01 Edouard Malbec Peristaltic pump and a tube for said pump
US4231725A (en) * 1978-10-16 1980-11-04 Cole-Parmer Instrument Company Peristaltic pump
US4289459A (en) * 1979-08-13 1981-09-15 Neeley William E Proportioning pump
US4294802A (en) * 1979-02-27 1981-10-13 Henry Johansson Apparatus for parallel feeding of small volumes of fluids in several essentially parallel flexible hoses
US4976590A (en) * 1988-06-08 1990-12-11 Baldwin Brian E Fluid conduit-responsively adjustable pump arrangement and pump/conduit arrangement and method, and fluid conduits therefor
US4995432A (en) * 1987-02-20 1991-02-26 Labsystems Oy Dosage equipment
US5367982A (en) * 1993-02-25 1994-11-29 Howard W. DeMoore Automatic coating circulation and wash-up system for printing presses
US5374251A (en) * 1993-04-14 1994-12-20 Entracare Medical fluid pump apparatus
WO1995014172A1 (en) * 1993-11-17 1995-05-26 Baxter International Inc. Organizer frame for a peristaltic pump
US5846061A (en) * 1996-11-08 1998-12-08 Board Of Trustees Of Michigan State University Peristaltic metering pump
US5871341A (en) * 1996-12-31 1999-02-16 Melody; Brian J. Peristaltic pump driven pump roller apparatus and methodology
US5870805A (en) * 1997-01-06 1999-02-16 Baxter International Inc. Disposable tubing set and organizer frame for holding flexible tubing
US5941696A (en) * 1996-09-10 1999-08-24 Embrex, Inc. Peristaltic pump
US6668753B2 (en) 2002-02-13 2003-12-30 Embrex, Inc. Methods and apparatus for delivering fluid to egg injection devices
US6810713B2 (en) * 2001-07-24 2004-11-02 Lg. Electronics Inc. Method for handling and delivering fluid on a lab-on-a-chip
US20050019186A1 (en) * 2003-07-23 2005-01-27 Davis Jeremy A. Peristaltic pump with ganged tubes
GB2405182A (en) * 2003-08-20 2005-02-23 Micro Chemical Systems Ltd Fluid dispenser
US20050047946A1 (en) * 2003-08-25 2005-03-03 Hewlett-Packard Development Company, L.P. Peristaltic pump
US20050238515A1 (en) * 2004-04-27 2005-10-27 Hewlett-Packard Development Company., L.P. Peristaltic pump
US20050238516A1 (en) * 2004-04-27 2005-10-27 Hewlett-Packard Development Company, Lp Peristaltic pump
US20050285311A1 (en) * 2004-06-28 2005-12-29 Audet Paul A Process and apparatus for pumping gases in a film
US20110180172A1 (en) * 2010-01-22 2011-07-28 Blu-White Industries, Inc. High pressure, high flow rate tubing assembly for a positive displacement pump
US20130056497A1 (en) * 2011-09-07 2013-03-07 Gojo Industries, Inc. Wiper foam pump, refill unit & dispenser for same
WO2016007342A1 (en) * 2014-07-09 2016-01-14 Perkinelmer Health Sciences, Inc. Peristaltic pump with rollers formed of borosilicate glass and related methods
CN106704156A (zh) * 2016-11-30 2017-05-24 重庆速腾机械制造有限公司 一种控制多路同轴流体流量的输送泵
CN106762569A (zh) * 2016-11-30 2017-05-31 重庆速腾机械制造有限公司 一种多路同轴流体输送泵
US9777720B2 (en) 2013-03-14 2017-10-03 Blue-White Industries, Ltd. High pressure, high flow rate tubing assembly and adapter for a positive displacement pump
US9909579B2 (en) 2014-06-09 2018-03-06 Blue-White Industries, Ltd. Overmolded tubing assembly and adapter for a positive displacement pump
US10578097B2 (en) 2016-12-15 2020-03-03 Perkinelmer Health Sciences, Inc. Peristaltic pumps and related methods
US11578716B2 (en) 2010-01-22 2023-02-14 Blue-White Industries, Ltd. Overmolded tubing assembly and adapter for a positive displacement pump
US11692540B2 (en) 2017-11-08 2023-07-04 Oina Vv Ab Peristaltic pump

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JPS5555122A (en) * 1978-10-19 1980-04-22 Agency Of Ind Science & Technol Heat decompositing method of styrene polymer
DE3025417A1 (de) * 1980-07-04 1982-02-04 Peerless Electronics Research Corp., Port Washington, N.Y. Pumpvorrichtung
US4673334A (en) * 1984-05-25 1987-06-16 Isco, Inc. Peristaltic pump
AT398810B (de) * 1985-08-13 1995-02-27 Avl Verbrennungskraft Messtech Schlauchpumpe
US4886431A (en) * 1988-04-29 1989-12-12 Cole-Parmer Instrument Company Peristaltic pump having independently adjustable cartridges
DE4006763A1 (de) * 1990-03-03 1991-09-05 Braun Melsungen Ag Lineare schlauchpumpe
JP2597628Y2 (ja) * 1991-04-05 1999-07-12 セイコーインスツルメンツ株式会社 ペリスタルチックポンプ

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US2696173A (en) * 1950-12-23 1954-12-07 Jensen Thormod Fluid pump
US3101674A (en) * 1960-12-20 1963-08-27 Technicon Instr Multiple-tube pump
US3353491A (en) * 1965-09-28 1967-11-21 James W Bastian Pumping device
DE1944102A1 (de) * 1969-03-21 1970-10-01 Polymetron Ag Schlauchpumpe
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US2696173A (en) * 1950-12-23 1954-12-07 Jensen Thormod Fluid pump
US2641516A (en) * 1951-06-08 1953-06-09 Bakane Anthony Combined roller and ball bearing
US3101674A (en) * 1960-12-20 1963-08-27 Technicon Instr Multiple-tube pump
US3353491A (en) * 1965-09-28 1967-11-21 James W Bastian Pumping device
US3591319A (en) * 1969-03-17 1971-07-06 Scientific Industries Flow conduit protective member for peristaltic pump
DE1944102A1 (de) * 1969-03-21 1970-10-01 Polymetron Ag Schlauchpumpe

Cited By (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3809498A (en) * 1972-12-15 1974-05-07 R Lewis Closed wound suction system
US3837433A (en) * 1973-03-05 1974-09-24 Roper Corp Lubricating system for chain saw
US4181476A (en) * 1977-09-19 1980-01-01 Edouard Malbec Peristaltic pump and a tube for said pump
US4231725A (en) * 1978-10-16 1980-11-04 Cole-Parmer Instrument Company Peristaltic pump
US4294802A (en) * 1979-02-27 1981-10-13 Henry Johansson Apparatus for parallel feeding of small volumes of fluids in several essentially parallel flexible hoses
US4289459A (en) * 1979-08-13 1981-09-15 Neeley William E Proportioning pump
US4995432A (en) * 1987-02-20 1991-02-26 Labsystems Oy Dosage equipment
US4976590A (en) * 1988-06-08 1990-12-11 Baldwin Brian E Fluid conduit-responsively adjustable pump arrangement and pump/conduit arrangement and method, and fluid conduits therefor
US5367982A (en) * 1993-02-25 1994-11-29 Howard W. DeMoore Automatic coating circulation and wash-up system for printing presses
US5374251A (en) * 1993-04-14 1994-12-20 Entracare Medical fluid pump apparatus
WO1995014172A1 (en) * 1993-11-17 1995-05-26 Baxter International Inc. Organizer frame for a peristaltic pump
US5460493A (en) * 1993-11-17 1995-10-24 Baxter International Inc. Organizer frame for holding an array of flexible tubing in alignment with one or more peristaltic pump rotors
US6186752B1 (en) 1993-11-17 2001-02-13 Baxter International Inc. Peristaltic pumping apparatus with tubing organizer
US5941696A (en) * 1996-09-10 1999-08-24 Embrex, Inc. Peristaltic pump
US5846061A (en) * 1996-11-08 1998-12-08 Board Of Trustees Of Michigan State University Peristaltic metering pump
US5871341A (en) * 1996-12-31 1999-02-16 Melody; Brian J. Peristaltic pump driven pump roller apparatus and methodology
US5870805A (en) * 1997-01-06 1999-02-16 Baxter International Inc. Disposable tubing set and organizer frame for holding flexible tubing
US6810713B2 (en) * 2001-07-24 2004-11-02 Lg. Electronics Inc. Method for handling and delivering fluid on a lab-on-a-chip
US6668753B2 (en) 2002-02-13 2003-12-30 Embrex, Inc. Methods and apparatus for delivering fluid to egg injection devices
US20050019186A1 (en) * 2003-07-23 2005-01-27 Davis Jeremy A. Peristaltic pump with ganged tubes
US7144231B2 (en) * 2003-07-23 2006-12-05 Hewlett-Packard Development Company, L.P. Peristaltic pump with ganged tubes
GB2405182A (en) * 2003-08-20 2005-02-23 Micro Chemical Systems Ltd Fluid dispenser
GB2405182B (en) * 2003-08-20 2008-01-02 Micro Chemical Systems Ltd Fluid dispenser
US20050047946A1 (en) * 2003-08-25 2005-03-03 Hewlett-Packard Development Company, L.P. Peristaltic pump
US7118203B2 (en) 2003-08-25 2006-10-10 Hewlett-Packard Development Company, L.P. Peristaltic pump
US20050238515A1 (en) * 2004-04-27 2005-10-27 Hewlett-Packard Development Company., L.P. Peristaltic pump
US20050238516A1 (en) * 2004-04-27 2005-10-27 Hewlett-Packard Development Company, Lp Peristaltic pump
US7591639B2 (en) 2004-04-27 2009-09-22 Hewlett-Packard Development Company, L.P. Peristaltic pump
US8393879B2 (en) 2004-04-27 2013-03-12 Hewlett-Packard Development Company, L.P. Peristaltic pump
US20050285311A1 (en) * 2004-06-28 2005-12-29 Audet Paul A Process and apparatus for pumping gases in a film
US7687010B2 (en) 2004-06-28 2010-03-30 Cryovac, Inc. Process and apparatus for pumping gases in a film
US7500841B2 (en) 2004-06-28 2009-03-10 Cryovac, Inc. Apparatus for pumping gases in a film
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Also Published As

Publication number Publication date
DE2245356A1 (de) 1973-03-22
GB1383858A (en) 1974-02-12
CH544222A (de) 1973-11-15
IT967502B (it) 1974-03-11
NL7212071A (de) 1973-03-20
JPS4947914A (de) 1974-05-09
BE788703A (fr) 1973-01-02
FR2154080A5 (de) 1973-05-04

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