US3689033A - Magnetic stirrer device - Google Patents
Magnetic stirrer device Download PDFInfo
- Publication number
- US3689033A US3689033A US62478A US3689033DA US3689033A US 3689033 A US3689033 A US 3689033A US 62478 A US62478 A US 62478A US 3689033D A US3689033D A US 3689033DA US 3689033 A US3689033 A US 3689033A
- Authority
- US
- United States
- Prior art keywords
- chamber
- rod
- magnetic stirrer
- mixing chamber
- transversally
- 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.)
- Expired - Lifetime
Links
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/45—Magnetic mixers; Mixers with magnetically driven stirrers
- B01F33/452—Magnetic mixers; Mixers with magnetically driven stirrers using independent floating stirring elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
Definitions
- a magnetic stirrer device comprising a transversally magnetized rod disposed in a mixing chamber and means for generating an alternating transversal magnetic field within the chamber so as to obtain a rotation of the rod and a stirring of the fluids in the chamber.
- the invention relates to a magnetic stirrer device and more particularly to a stirrer device in which no motor is required for attaining a rotation of the magnetic stirrer.
- Magnetic stirrer devices usually comprise a longitudinally magnetized rod, arranged in a mixing vessel. Under the vessel a similar magnet is arranged, this magnet being secured to the shaft of a motor so as to make it possible to rotate this magnet. This rotation then implies a corresponding rotation of the stirrer within the vessel.
- the advantages of such a magnetic stirrer in comparison with conventional mechanical stirrers is that no shafts have to be introduced into the mixing vessel and furthermore it is easy to change mixing vessels and appertaining stirrers without any time consuming cleaning procedure.
- One object of this invention is to provide a magnetic stirrer device in which it is possible to use a very small mixing vessel.
- Another object of the present invention is to provide a magnetic stirrer device in which the axis of the stirrer is coaxial with the stream of fluids to be mixed.
- Another object of the invention is to provide a magnetic stirrer device which does not require a motor for rotating the stirrer.
- FIG. 1 is a cross sectional view of the device and FIG. 2 is an elevational view of part of the device of FIG. 1.
- FIG. 3 is a top view of FIG. 2.
- FIGS. 4 and 5 are elevational views of part of different embodiments of the device of this invention.
- ref. 1 denotes a cylindrical mixing chamber.
- the mixing chamber is provided with a magnetic stirrer 2 consisting of a transversally magnetized rod.
- the mixing chamber is secured between two pole pieces 5 and 6 by means of two ribbons 3 and 4, the ribbons for instance consisting of conventional O-rings.
- the pole pieces are attached to a magnetic core 7 provided with two coils 8 and 9 connected to an altemating voltage source 10, the source preferably consisting of an oscillator the frequency of which can be varied.
- an alternating magnetic field is provided within the mixing chamber 1. This alternating magnetic field will imply a rotation of the stirrer 2 and by giving the stirrer a suitable shape a mixing will be obtained within the chamber.
- the stirrer is preferably provided with vanes 11 which could either be part of the magnetic rod or be formed by a cover of the rod.
- This cover could for instance consist of a thin layer of tetrafluor ethylene (Teflon) which is welded at the ends of the rod in such a way that a vane isobhaind at each end of the rod.
- a top view of rod 2 is s own in FIG. 3 which illustrates vanes mounted on the ends of rod 2.
- One end of the chamber is then connected to a supplying hose 12 and the opposite end is connected to a discharging hose 13.
- the supplying hose is for instance connected to a junction 14 to which the different fluids to be mixed are supplied either simultaneously or alternatively.
- magnetic stirrer 15 consists of transversally magnetized rod 16 and screw shaped outer surface 17.
- magnetic stirrer 18 consists of transversally magnetized rod 19 and bore 20.
- Magnetic stirrer device for stirring a liquid flow, said device comprising a tubular mixing chamber which is coaxial with said flow, a feed means for supplying the components of said flow to one end of said tubular mixing chamber, a discharge means for discharging said flow from the other end of said tubular mixing chamber, a magnetic stirrer located in said tubular mixing chamber and formed by a transversally magnetized rod which is coaxial with said chamber, and means outside of said chamber for generating an alternating magnetic field in said chamber so as to rotate said magnetic stirrer around an axis parallel to the longitudinal axis of said tubular mixing chamber.
- said alternating magnetic field generating means comprises an oscillator connected to coils on a magnetic core, the pole pieces of said core being spaced around said chamber, and said oscillator having an adjustable frequency, and wherein only one transversally magnetized rod is used.
- transversally magnetized rod has a screw shaped outer surface.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
Abstract
A magnetic stirrer device comprising a transversally magnetized rod disposed in a mixing chamber and means for generating an alternating transversal magnetic field within the chamber so as to obtain a rotation of the rod and a stirring of the fluids in the chamber.
Description
United States Patent Holmstrom et al.
- 1 Sept. 5, 1972 [54] MAGNETIC STIRRER DEVICE Sweden [73] Assignee: LKB-Produkter AB, Bromma,
Sweden [22] Filed: Aug. 10, 1970 [21] Appl. No.: 62,478
[52] US. Cl. ..259/5, 259/DIG. 46 [51] Int. Cl. ..B0lf 13/08 [58] Field of Search ..259/DlG. 46, 1 R, 5, 7, 9,
[56] References Cited UNlTED STATES PATENTS 3,219,318 11/1965 Hershler ..259/DIG. 46
3,167,669 l/l965 Bodine ..259/1 R X 2,999,673 9/1961 Kessler ..259/DIG. 46
FOREIGN PATENTS OR APPLICATIONS 991,941 6/1951 France ..259/DlG. 46
Primary Examiner-Walter A. Scheel Assistant ExaminerPhilip R. Coe Attorney-Christen and Sabol ABS'I RACT A magnetic stirrer device comprising a transversally magnetized rod disposed in a mixing chamber and means for generating an alternating transversal magnetic field within the chamber so as to obtain a rotation of the rod and a stirring of the fluids in the chamber.
6 Claims, 5 Drawing Figures MAGNETIC STIRRER DEVICE The invention relates to a magnetic stirrer device and more particularly to a stirrer device in which no motor is required for attaining a rotation of the magnetic stirrer.
Present day magnetic stirrer devices usually comprise a longitudinally magnetized rod, arranged in a mixing vessel. Under the vessel a similar magnet is arranged, this magnet being secured to the shaft of a motor so as to make it possible to rotate this magnet. This rotation then implies a corresponding rotation of the stirrer within the vessel. The advantages of such a magnetic stirrer in comparison with conventional mechanical stirrers is that no shafts have to be introduced into the mixing vessel and furthermore it is easy to change mixing vessels and appertaining stirrers without any time consuming cleaning procedure. The substantial drawbacks of the present day magnetic stirrers are that it is difficult to make the stirrer rotate if the volume of the vessel and consequently the stirrer is small and furthermore they can not be used for mixing streaming fluids when the axis of the stirrer has to be coaxial with the flow.
One object of this invention is to provide a magnetic stirrer device in which it is possible to use a very small mixing vessel.
Another object of the present invention is to provide a magnetic stirrer device in which the axis of the stirrer is coaxial with the stream of fluids to be mixed.
Another object of the invention is to provide a magnetic stirrer device which does not require a motor for rotating the stirrer.
The foregoing objects of the, invention will be apparent from the following detailed description when taken in conjunction with the drawing in which a preferred embodiment of the device according to the invention is shown and in which FIG. 1 is a cross sectional view of the device and FIG. 2 is an elevational view of part of the device of FIG. 1.
FIG. 3 is a top view of FIG. 2.
FIGS. 4 and 5 are elevational views of part of different embodiments of the device of this invention.
In the drawing ref. 1 denotes a cylindrical mixing chamber. The mixing chamber is provided with a magnetic stirrer 2 consisting of a transversally magnetized rod. The mixing chamber is secured between two pole pieces 5 and 6 by means of two ribbons 3 and 4, the ribbons for instance consisting of conventional O-rings. The pole pieces are attached to a magnetic core 7 provided with two coils 8 and 9 connected to an altemating voltage source 10, the source preferably consisting of an oscillator the frequency of which can be varied. By means of the alternating voltage source and the coils an alternating magnetic field is provided within the mixing chamber 1. This alternating magnetic field will imply a rotation of the stirrer 2 and by giving the stirrer a suitable shape a mixing will be obtained within the chamber. In order to obtain a good-mixing effect the stirrer is preferably provided with vanes 11 which could either be part of the magnetic rod or be formed by a cover of the rod. This cover could for instance consist of a thin layer of tetrafluor ethylene (Teflon) which is welded at the ends of the rod in such a way that a vane isobhaind at each end of the rod. A top view of rod 2 is s own in FIG. 3 which illustrates vanes mounted on the ends of rod 2. One end of the chamber is then connected to a supplying hose 12 and the opposite end is connected to a discharging hose 13. The supplying hose is for instance connected to a junction 14 to which the different fluids to be mixed are supplied either simultaneously or alternatively.
Although only one embodiment of the invention has been described in detail above it should be understood that various changes can be carried out without departing from the spirit or scope of the invention. Thus the number of pole pieces spaced around the chamber might of course be increased as well as the number of differentially magnetized segments of the stirrer. Furthermore different shapes of the rod or the layer with which it is covered are possible. Thus a pumping effect could be obtained e.g. by having a screw shaped outer surface of the rod or by providing the rod with a bore. In FIG. 4 magnetic stirrer 15 consists of transversally magnetized rod 16 and screw shaped outer surface 17. In FIG. 17 magnetic stirrer 18 consists of transversally magnetized rod 19 and bore 20.
What is claimed is:
1. Magnetic stirrer device for stirring a liquid flow, said device comprising a tubular mixing chamber which is coaxial with said flow, a feed means for supplying the components of said flow to one end of said tubular mixing chamber, a discharge means for discharging said flow from the other end of said tubular mixing chamber, a magnetic stirrer located in said tubular mixing chamber and formed by a transversally magnetized rod which is coaxial with said chamber, and means outside of said chamber for generating an alternating magnetic field in said chamber so as to rotate said magnetic stirrer around an axis parallel to the longitudinal axis of said tubular mixing chamber.
2. The device of claim 1 wherein said alternating magnetic field generating means comprises an oscillator connected to coils on a magnetic core, the pole pieces of said core being spaced around said chamber, and said oscillator having an adjustable frequency, and wherein only one transversally magnetized rod is used.
3. The device of claim 1 wherein said transversally magnetized rod is provided on each end with a protrusion.
4. The device of claim 3 wherein said protrusions on each end of said transversally magnetized rod are vanes.
5. The device of claim 1 wherein the transversally magnetized rod has a screw shaped outer surface.
6. The device of claim 1 wherein the transversally magnetized rod is a bored rod.
Claims (6)
1. Magnetic stirrer device for stirring a liquid flow, said device comprising a tubular mixing chamber which is coaxial with said flow, a feed means for supplying the components of said flow to one end of said tubular mixing chamber, a discharge means for discharging said flow from the other end of said tubular mixing chamber, a magnetic stirrer located in said tubular mixing chamber and formed by a transversally magnetized rod which is coaxial with said chamber, and means outside of said chamber for generating an alternating magnetic field in said chamber so as to rotate said magnetic stirrer around an axis parallel to the longitudinal axis of said tubular mixing chamber.
2. The device of claim 1 wherein said alternating magnetic field generating means comprises an oscillator connected to coils on a magnetic core, the pole pieces of said core being spaced around said chamber, and said oscillator having an adjustable frequency, and wherein only one transversally magnetized rod is used.
3. The device of claim 1 wherein said transversally magnetized rod is provided on each end with a protrusion.
4. The device of claim 3 wherein said protrusions on each end of said transversally magnetized rod are vanes.
5. The device of claim 1 wherein the transversally magnetized rod has a screw shaped outer surface.
6. The device of claim 1 wherein the transversally magnetized rod is a bored rod.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US6247870A | 1970-08-10 | 1970-08-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3689033A true US3689033A (en) | 1972-09-05 |
Family
ID=22042762
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US62478A Expired - Lifetime US3689033A (en) | 1970-08-10 | 1970-08-10 | Magnetic stirrer device |
Country Status (3)
Country | Link |
---|---|
US (1) | US3689033A (en) |
DE (1) | DE2136472C3 (en) |
GB (1) | GB1334032A (en) |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3905583A (en) * | 1972-11-15 | 1975-09-16 | Cellophane Sa | Method and device for the fabrication of improved plastic and cellulose films |
US3907258A (en) * | 1973-11-12 | 1975-09-23 | Orion Research | Apparatus for mixing fluids on stream |
US3995835A (en) * | 1974-07-08 | 1976-12-07 | Owens-Illinois, Inc. | Magnetic mixer |
US4054270A (en) * | 1974-06-20 | 1977-10-18 | The United States Of America As Represented By The Secretary Of Agriculture | Micro mixing apparatus and method |
US4611615A (en) * | 1983-11-02 | 1986-09-16 | Petrovic Ljubisa M | Fluid treatment apparatus and method |
US4767218A (en) * | 1987-05-04 | 1988-08-30 | Stoelting, Inc. | Mixing paddle assembly |
US4830511A (en) * | 1986-10-29 | 1989-05-16 | The Coca-Cola Company | Postmix juice dispensing system |
US5040898A (en) * | 1987-03-02 | 1991-08-20 | Ionode Pty. Ltd. | Mixing apparatus and method |
US5556654A (en) * | 1978-05-17 | 1996-09-17 | Fregeau; Leo J. | Magnet beverage treatment |
WO1998006485A1 (en) * | 1996-08-09 | 1998-02-19 | Genex Limited | Agitation apparatus |
US5911503A (en) * | 1996-04-17 | 1999-06-15 | Bayer Aktiengesellschaft | Chemical reactor with magnetic stirring device |
US6416215B1 (en) * | 1999-12-14 | 2002-07-09 | University Of Kentucky Research Foundation | Pumping or mixing system using a levitating magnetic element |
US20040047232A1 (en) * | 2000-10-09 | 2004-03-11 | Terentiev Alexandre N. | System using a levitating, rotating pumping or mixing element and related methods |
US6758593B1 (en) | 2000-10-09 | 2004-07-06 | Levtech, Inc. | Pumping or mixing system using a levitating magnetic element, related system components, and related methods |
JP2017222167A (en) * | 2016-06-15 | 2017-12-21 | 船井電機株式会社 | Fluid dispensing device |
US20170368831A1 (en) * | 2016-06-27 | 2017-12-28 | Funai Electric Co., Ltd. | Method of maintaining a fluidic dispensing device |
US20200197887A1 (en) * | 2017-09-06 | 2020-06-25 | Access Medical Systems, Ltd. | Ferromagnetic rotors for agitating the liquid in a microwell |
US10913278B2 (en) | 2016-08-17 | 2021-02-09 | Funai Electric Co., Ltd. (Jp) | Fluidic dispensing device having a moveable stir bar |
US20220226788A1 (en) * | 2021-01-18 | 2022-07-21 | Kepco Engineering & Construction Company, Inc. | Apparatus for removing thermal stratification generated by turbulent penetration by using rotation of inner ring and outer ring |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2486820A1 (en) * | 1980-07-16 | 1982-01-22 | Charriere Jean | Mixing or propulsion chamber for one or more fluids - where rotor driven by electromagnetic induction is located on axis of mixing chamber inside ring stator of electric motor |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR991941A (en) * | 1949-05-07 | 1951-10-11 | Device for mixing the contents of blood pipettes | |
US2999673A (en) * | 1959-08-05 | 1961-09-12 | Technicon Instr | Liquid mixing means |
US3167669A (en) * | 1961-10-10 | 1965-01-26 | Jr Albert G Bodine | Electromagnetic rotary field apparatus for generating and applying gyratory sonic vibrations |
US3219318A (en) * | 1961-08-22 | 1965-11-23 | Hershler Abe | Fluid treating method and apparatus |
-
1970
- 1970-08-10 US US62478A patent/US3689033A/en not_active Expired - Lifetime
-
1971
- 1971-07-21 DE DE2136472A patent/DE2136472C3/en not_active Expired
- 1971-07-23 GB GB3479971A patent/GB1334032A/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR991941A (en) * | 1949-05-07 | 1951-10-11 | Device for mixing the contents of blood pipettes | |
US2999673A (en) * | 1959-08-05 | 1961-09-12 | Technicon Instr | Liquid mixing means |
US3219318A (en) * | 1961-08-22 | 1965-11-23 | Hershler Abe | Fluid treating method and apparatus |
US3167669A (en) * | 1961-10-10 | 1965-01-26 | Jr Albert G Bodine | Electromagnetic rotary field apparatus for generating and applying gyratory sonic vibrations |
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3905583A (en) * | 1972-11-15 | 1975-09-16 | Cellophane Sa | Method and device for the fabrication of improved plastic and cellulose films |
US3907258A (en) * | 1973-11-12 | 1975-09-23 | Orion Research | Apparatus for mixing fluids on stream |
US4054270A (en) * | 1974-06-20 | 1977-10-18 | The United States Of America As Represented By The Secretary Of Agriculture | Micro mixing apparatus and method |
US3995835A (en) * | 1974-07-08 | 1976-12-07 | Owens-Illinois, Inc. | Magnetic mixer |
US5556654A (en) * | 1978-05-17 | 1996-09-17 | Fregeau; Leo J. | Magnet beverage treatment |
US4611615A (en) * | 1983-11-02 | 1986-09-16 | Petrovic Ljubisa M | Fluid treatment apparatus and method |
US4830511A (en) * | 1986-10-29 | 1989-05-16 | The Coca-Cola Company | Postmix juice dispensing system |
US5040898A (en) * | 1987-03-02 | 1991-08-20 | Ionode Pty. Ltd. | Mixing apparatus and method |
US4767218A (en) * | 1987-05-04 | 1988-08-30 | Stoelting, Inc. | Mixing paddle assembly |
US5911503A (en) * | 1996-04-17 | 1999-06-15 | Bayer Aktiengesellschaft | Chemical reactor with magnetic stirring device |
WO1998006485A1 (en) * | 1996-08-09 | 1998-02-19 | Genex Limited | Agitation apparatus |
US6416215B1 (en) * | 1999-12-14 | 2002-07-09 | University Of Kentucky Research Foundation | Pumping or mixing system using a levitating magnetic element |
US20040047232A1 (en) * | 2000-10-09 | 2004-03-11 | Terentiev Alexandre N. | System using a levitating, rotating pumping or mixing element and related methods |
US6758593B1 (en) | 2000-10-09 | 2004-07-06 | Levtech, Inc. | Pumping or mixing system using a levitating magnetic element, related system components, and related methods |
US6899454B2 (en) * | 2000-10-09 | 2005-05-31 | Levtech, Inc. | Set-up kit for a pumping or mixing system using a levitating magnetic element |
US7086778B2 (en) | 2000-10-09 | 2006-08-08 | Levtech, Inc. | System using a levitating, rotating pumping or mixing element and related methods |
JP2017222167A (en) * | 2016-06-15 | 2017-12-21 | 船井電機株式会社 | Fluid dispensing device |
US20170368831A1 (en) * | 2016-06-27 | 2017-12-28 | Funai Electric Co., Ltd. | Method of maintaining a fluidic dispensing device |
US10336081B2 (en) * | 2016-06-27 | 2019-07-02 | Funai Electric Co., Ltd. | Method of maintaining a fluidic dispensing device |
US10913278B2 (en) | 2016-08-17 | 2021-02-09 | Funai Electric Co., Ltd. (Jp) | Fluidic dispensing device having a moveable stir bar |
US20200197887A1 (en) * | 2017-09-06 | 2020-06-25 | Access Medical Systems, Ltd. | Ferromagnetic rotors for agitating the liquid in a microwell |
US20220226788A1 (en) * | 2021-01-18 | 2022-07-21 | Kepco Engineering & Construction Company, Inc. | Apparatus for removing thermal stratification generated by turbulent penetration by using rotation of inner ring and outer ring |
Also Published As
Publication number | Publication date |
---|---|
DE2136472B2 (en) | 1973-04-12 |
DE2136472A1 (en) | 1972-02-24 |
DE2136472C3 (en) | 1973-10-31 |
GB1334032A (en) | 1973-10-17 |
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