EP0669160A1 - Mélangeur magnétique avec son boîtier - Google Patents

Mélangeur magnétique avec son boîtier Download PDF

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Publication number
EP0669160A1
EP0669160A1 EP94120499A EP94120499A EP0669160A1 EP 0669160 A1 EP0669160 A1 EP 0669160A1 EP 94120499 A EP94120499 A EP 94120499A EP 94120499 A EP94120499 A EP 94120499A EP 0669160 A1 EP0669160 A1 EP 0669160A1
Authority
EP
European Patent Office
Prior art keywords
magnetic stirrer
stirrer according
rotary knob
edge
glass
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.)
Granted
Application number
EP94120499A
Other languages
German (de)
English (en)
Other versions
EP0669160B1 (fr
Inventor
Alfred Wanninger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Janke & Kunkel & Co KG Ika-Labortechnik GmbH
Original Assignee
Janke & Kunkel & Co KG Ika-Labortechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Janke & Kunkel & Co KG Ika-Labortechnik GmbH filed Critical Janke & Kunkel & Co KG Ika-Labortechnik GmbH
Publication of EP0669160A1 publication Critical patent/EP0669160A1/fr
Application granted granted Critical
Publication of EP0669160B1 publication Critical patent/EP0669160B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the invention relates to a magnetic stirrer with a housing, which has a lower part and an upper part which can be connected to it, the drive motor with its control and the electrical connection being arranged in the lower part and the upper part which can be attached to it on the upper side of the mounting surface for a stirring vessel containing the stirring magnet forms.
  • the upper part of the housing can also be the installation surface for the mixing vessel.
  • this consists of plastic, so that in the case of an aggressive medium to be stirred, there is a risk that this upper part will be damaged by overflowing constituents or substances or also by aggressive vapors released during stirring. If the outside of the vessel is wetted with the aggressive medium to be stirred, the base will be exposed to this medium for a correspondingly long time and may be irreparably destroyed.
  • Glass is a sufficiently stable material to serve as a footprint for the mixing vessel, which is usually also made of glass, and can withstand aggressive media such as the mixing vessel made of glass.
  • Such a glass upper part can be manufactured inexpensively, especially since glass is an inexpensive material.
  • the edge to be connected to the lower part of this upper part which is made of glass, can be shaped and so smooth that a sufficient seal is automatically created when pressed onto the lower part.
  • the lower part of the device consists of a somewhat resilient material.
  • the counter surface adapts to the upper part when pressed against it, even if there are slight dimensional deviations, so that the sealing effect is improved.
  • a particularly good seal is obtained if the upper part made of glass is cap-shaped or bowl-shaped and has a bead, flange or similar widening on its lower free peripheral edge in the position of use, and if a seat on the lower part has an undercut for receiving it Widening is provided.
  • the seat for the edge can be sunk inside the lower part, so that a sealing surface forms both on the end face of the edge of the glass part and on the widening and finally over part of the height on the side surface of the glass upper part.
  • the glass upper part can be pressed against its seat from above, although the widening is excessive compared to the uppermost opening of the upper part.
  • the upper opening of the lower part should lie under pressure on the outside of the glass upper part. This results in a sealing seat that is also impermeable to vapors along the connecting line between the lower part and the upper part.
  • the side wall of the upper part made of glass can have a recess for the passage of a rotary knob shaft, so that the device can be changed from the outside, for example with respect to the engine speed. It is useful if the knob bearing itself is provided on the lower part and protrudes so far over the upper part that the recess for the rotary shaft covers and is also sealed on the outside of the upper part.
  • the outer edge of the rotary knob with the shaft attached to it can be rotatably locked to the rotary knob bearing of the lower part of the housing.
  • the rotary knob bearing of the lower part has a circumferential groove and the rotary knob has a circumferential edge or bead which fits into the groove and can be locked with this groove. Since the groove and bead run in a circle, the rotary knob can be used to change the motor rotation despite this locking number will be twisted.
  • the use of glass has the advantage that the upper part can be made transparent and thus also enables the user to visually check the motor located inside.
  • this upper part in particular on the inside, that is to say providing a coating in the sealed space and thus separate from aggressive media.
  • This has the advantage that, due to such a coating, the device can be designed to be optically different and appealing, depending on the use of colors, graphics and patterns, and, for example, inscriptions, the brand or instructions can be well protected and attached in a clearly visible manner.
  • Another advantage of the glass upper part is that it can be easily and inexpensively replaced by a new upper part of this type in the event of damage or destruction, especially since the assembly is also very simple.
  • the shaft of the rotary knob can be coupled with an adjustable potentiometer, the change of which changes the speed of the motor. If the rotary shaft is turned too far, the potentiometer, which only allows a limited angle of rotation, could be torn out of its holder. On the one hand, this can be recognized by the glass hood and, on the other hand, a design of the rotatable knob is possible in such a way that a stop limiting this rotation path to the highest angle of rotation of the potentiometer is provided on its rotation path.
  • a magnetic stirrer of great performance which is also easy to keep small in size, which is chemically highly resistant, can be manufactured inexpensively due to the low technical outlay, requires few individual parts and is overall very reliable can be.
  • a magnetic stirrer designated as a whole has a housing 2, which is composed of two parts, namely a lower part 3 and an upper part 4, wherein in the lower part 3 a drive motor 5 with control and the like and also with the electrical connection are arranged and this Drive motor 5 has magnets 6, with which a stirring magnet, not shown, can be rotated in a stirring vessel.
  • the upper part 4 is fastened to the lower part 3 and the upper side 7 of this upper part 4 is the mounting surface for a stirring vessel containing the stirring magnet, which often consists of glass.
  • the upper part 4 of this magnetic stirrer 1 is also made of glass and its edges are self-sealingly pressed onto the lower part 3 of the housing 2 in a manner to be described.
  • edge 8 of the upper part 4 which is made of glass and which is to be connected to the lower part 3 is so smooth that a good sealing effect is already achieved by pressing on a corresponding counter surface 9 of the lower part 4.
  • the lower part 4 can consist of a somewhat resilient material, so that the edge 8 and the counter surface 9 can also adapt to mutual slight dimensional deviations when compressed, thereby producing the aforementioned sealing effect.
  • the upper part 3 made of glass is cap-shaped or bowl-shaped, the "bottom” of this "bowl” is directed upwards in the position of use and forms the installation surface 7.
  • the lower free peripheral edge 8 in this position of use has a widening 10 approximately in the form of a flange which is opposite the outside of the Upper part 4 protrudes radially outwards.
  • the lower part 3 has in the area of the counter surface 9 an annular undercut 11 which, in the position of use, receives the aforementioned widening 10 in a form-fitting manner.
  • the glass upper part 4 can be pressed into its use position from above and locked with its widening 10 in the undercut 11, although this widening is excessive compared to the actual upper opening of the lower part 3 .
  • the opening of the lower part 3 rests under pressure on the outside of the upper part 4 and causes the sealing seat, which is impenetrable for vapors, along the contacting surfaces between the lower part 3 and the upper part 4.
  • the side wall of the upper part 4 has a recess 12 for the passage of a knob shaft 13, which is shown separately in Fig. 4 together with the knob 14.
  • the magnetic stirrer 1 can be changed from the outside, for example with respect to the motor speed, via the rotary knob shaft 13.
  • the rotary knob bearing 15 itself is provided on the lower part 3, as can be seen in FIGS. 1 and 3.
  • This knob bearing 15 stands high with respect to the lower part and thus projects laterally beyond the upper part 4 to such an extent that the recess 12 provided there for the rotary knob shaft 13 overlaps and is also sealed with appropriate contact on the outside of the upper part 4.
  • This protrusion and abutting the rotary knob bearing 15 on the outside of the upper part 4 can be seen above all in FIG. 1 but also in FIG. 2, where one recognizes the adaptation of this rotary knob bearing 15 to the circular contour of the upper part 4 in the exemplary embodiment.
  • the knob bearing 14 has a circumferential groove 16 and the knob 14 has the circumferential edge 14a or bead which fits into the groove 16 and which is latched to the groove 16. This results in a very simple assembly and also easy disassembly. Since the groove 16 and the rim or bead 14a run in a circle, the rotary knob 14 with its central rotary knob shaft 13 can be rotated in spite of this locking, for example to change the engine speed.
  • connection between the upper part 4 and lower part 3 can be further improved in that these parts are glued together. At the same time, the seal is also improved.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
  • Food-Manufacturing Devices (AREA)
EP94120499A 1994-02-25 1994-12-23 Mélangeur magnétique avec son boîtier Expired - Lifetime EP0669160B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4406217 1994-02-25
DE4406217A DE4406217C2 (de) 1994-02-25 1994-02-25 Magnetrührer mit einem Gehäuse

Publications (2)

Publication Number Publication Date
EP0669160A1 true EP0669160A1 (fr) 1995-08-30
EP0669160B1 EP0669160B1 (fr) 1997-03-12

Family

ID=6511248

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94120499A Expired - Lifetime EP0669160B1 (fr) 1994-02-25 1994-12-23 Mélangeur magnétique avec son boîtier

Country Status (5)

Country Link
US (1) US5547280A (fr)
EP (1) EP0669160B1 (fr)
JP (1) JP3683301B2 (fr)
DE (2) DE4406217C2 (fr)
ES (1) ES2098860T3 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5899567A (en) * 1997-09-23 1999-05-04 Morris, Jr.; Joseph E. Magnetic synchronized stirring and heating test apparatus
US6416215B1 (en) 1999-12-14 2002-07-09 University Of Kentucky Research Foundation Pumping or mixing system using a levitating magnetic element
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
US6382827B1 (en) 2000-11-01 2002-05-07 Dade Behring Inc. Method and apparatus for mixing liquid solutions using a rotating magnet to generate a stirring vortex action
US20020118594A1 (en) * 2001-02-28 2002-08-29 Vellinger John C. Apparatus and method for mixing small volumes of liquid
US6467946B1 (en) 2001-04-24 2002-10-22 Dade Microscan Inc. Method and apparatus for mixing liquid samples in a container using rotating magnetic fields
US6988825B2 (en) * 2002-07-03 2006-01-24 Bio/Data Corporation Method and apparatus for using vertical magnetic stirring to produce turbulent and chaotic mixing in various states, without compromising components
US20050183582A1 (en) * 2003-08-21 2005-08-25 Mcfadden Curt Controls for magnetic stirrer and/or hot plate
US7075040B2 (en) * 2003-08-21 2006-07-11 Barnstead/Thermolyne Corporation Stirring hot plate
US7494267B2 (en) * 2005-08-30 2009-02-24 Chemglass, Inc. Reaction block for supporting flasks of different sizes for chemical synthesis on a hot plate stirrer
US20080059909A1 (en) * 2006-09-01 2008-03-06 Rita Parada Enhanced list based user interface in mobile context
US8480292B2 (en) * 2010-06-01 2013-07-09 Boris Dushine Systems, apparatus and methods to reconstitute dehydrated drinks
US10881135B1 (en) 2017-11-10 2021-01-05 Creative Destruction, LLC Cyclonically cooled and filtered smoking water pipe and method
CN110559933A (zh) * 2018-06-05 2019-12-13 艾卡工厂有限及两合公司 磁性搅拌器、个性化磁性搅拌器的装饰衬垫的应用和方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3138370A (en) * 1963-03-04 1964-06-23 Thermolyne Corp Magnetic stirring device
US3384353A (en) * 1967-05-31 1968-05-21 Cole Parmer Instr & Equipment Magnetic stirrer
GB2082929A (en) * 1980-08-25 1982-03-17 Immuno Ag Method of, and arrangement for, accelerating the dissolution of a hard-soluble lyophilized medicament
US4477192A (en) * 1982-06-25 1984-10-16 Warner-Lambert Company Magnetic stirring apparatus and method

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2350534A (en) * 1942-10-05 1944-06-06 Rosinger Arthur Magnetic stirrer
US2655354A (en) * 1947-08-29 1953-10-13 Pollard & Johnston Mixer and processor for home use and the like
US2958517A (en) * 1958-04-28 1960-11-01 Bellco Glass Inc Vessel for tissue culture and the like comprising a magnetic stirrer
US3116913A (en) * 1961-05-29 1964-01-07 Lane Kingdon Liquid agitating apparatus
FR1570922A (fr) * 1967-06-22 1969-06-13
DE7041043U (de) * 1970-11-05 1971-02-18 Klitzing L Unterwasser-magnetruehrer mit synchronmotor
US4162855A (en) * 1974-11-18 1979-07-31 Spectroderm International, Inc. Magnetic stirrer apparatus
DE3402041A1 (de) * 1984-01-21 1985-07-25 Janke & Kunkel GmbH & Co KG Ika - Werk, 7813 Staufen Magnetruehrer
JPS63151342A (ja) * 1986-12-15 1988-06-23 Gakken Co Ltd 撹拌装置
SU1629081A1 (ru) * 1988-11-09 1991-02-23 Воронежский Политехнический Институт Магнитный смеситель

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3138370A (en) * 1963-03-04 1964-06-23 Thermolyne Corp Magnetic stirring device
US3384353A (en) * 1967-05-31 1968-05-21 Cole Parmer Instr & Equipment Magnetic stirrer
GB2082929A (en) * 1980-08-25 1982-03-17 Immuno Ag Method of, and arrangement for, accelerating the dissolution of a hard-soluble lyophilized medicament
US4477192A (en) * 1982-06-25 1984-10-16 Warner-Lambert Company Magnetic stirring apparatus and method

Also Published As

Publication number Publication date
DE4406217C2 (de) 1997-04-17
US5547280A (en) 1996-08-20
ES2098860T3 (es) 1997-05-01
EP0669160B1 (fr) 1997-03-12
DE59402067D1 (de) 1997-04-17
DE4406217A1 (de) 1995-09-07
JPH07251055A (ja) 1995-10-03
JP3683301B2 (ja) 2005-08-17

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