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Publication numberUS2549121 A
Publication typeGrant
Publication dateApr 17, 1951
Filing dateJul 8, 1946
Priority dateJul 8, 1946
Publication numberUS 2549121 A, US 2549121A, US-A-2549121, US2549121 A, US2549121A
InventorsOsterheld Clark M
Original AssigneeMcgraw Electric Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 2549121 A
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Description  (OCR text may contain errors)

April 17, 1951 c. M. OSTERHELD 2,549,121

MIXER Filed July 8, 1946 I IIIIH III n 7Q 1 IN VEN TOR.

CLARK M. OSTERHELD BY MM Patented Apr. 17, 1951 MIXER Clark M. Osterheld, Stoughton, Wis., assignor to McGraw Electric Company, Elgin, 111., a corporation of Delaware Application July 8, 1946, Serial No. 682,032 2 Claims. (01. 259-108) tators therefor.

An object of my invention is to provide a novel form of drive for the agitators of mixers.

Another object of my invention is to provide a permanent magnet drive for mixers.

Another object of my invention is to provide an assembly in food and drink mixers cooperative with a permanent magnet drive.

Other objects of my invention will either be pointed out in the description of several forms of devices embodying my invention or will be set forth therein, particularly in the appended claims. 1

In the drawings,

Figure 1 is a view mainly in vertical section of a mixer embodying my invention,

Figs. 2, 3 and 4 are horizontal sectional views taken along the lines 22, 33 and 4-4 re-'- spectively in Fig. 1.

In the drawings is shown a device embodying my invention comprising a container 61 which is adapted to be inserted in and removed from a supporting housing 95. The container 61 as well as the housing 95 may be made of a plastic material such as Bakelite. The supporting housing 69 is supported by a rest 1| which is substantially of annular shape and is adapted to be closed by a plate 13 which may be either of metal or of Bakelite.

I provide a small electric motor 15 which is supported within the hollow housing 69 so that its shaft extends substantially vertically. Supporting means for the motor 15 includes an annular member 11 provided with four outwardly extending arms 19, portion 11 having secured thereto the motor 15 as by a plurality of shortmachine screws 8 I, while the upper ends of arms 19 are secured against downwardly projecting lugs by machine screws 83. I

The motor shaft 85 has mounted thereon a driving member 81 which is provided with a central opening therethrough to receive shaft 85 as well as two horizontally extending arms 81 which are provided with recessed upper projections 89. A permanent magnet 9|, which may be made of Alnico, has two depending lugs 93 which are adapted to extend into the recesses in lugs 89 to cause rotation of the permanent magnet 9| by the motor 15. The upper end of housing 69 is covered and closed by a metal of plastic housing 95 which is provided with a depending portion 91 which is substantially flat and is provided with a central aperture 99, which aperture is adapted to receive the upper end of a short shaft which extends through magnet 9|, which latter is held in proper operative position relatively to the lower portion 91 as by a nut I03 having screw-threaded engagement with the lower end portion of shaft IOI. Permanent magnet 9| may rotate on a bearing washer I which is held by nut I03. A spacing washer I00 around shaft MI is located between the upper surface of magnet 9| and the lower surface of member 91.

Container 61 is provided with an agitator which comprises vanes I 01 and a permanent magnet I09. Permanent magnet I09 is adapted to rest upon a support III which is of substantially inverted saucer shape. A nut I08 and washer I05 hold the vanes I01 and magnet I09 on shaft II3, a tubular bushing I|0 being provided around shaft H3.

I provide an upwardly extending shaft II3 which has a knob I I5 at its upper end and which has at its lowermost end an enlargement 1 effective to hold the combined vane and permanent magnet structure in proper operative position within the container 61. I provide in the container 61 two radially inwardly extending spring members II9, the design and construction of the lower end N1 of vertical shaft H3 and of the spring members |I9 being such that it is easy for the operator to pull out the structure comprising shaft II3, vanes I01 and permanent magnet I 09 as well as to re-insert the same whenever desired or necessary. Further, the container 61 may be removed from the base and reinserted easily and conveniently whenever desired.

The device embodying my invention thus provides a relatively simple means for driving an agitator comprising permanent motor driven magnets and is not dependent upon the use of a winding substantially supported and effective to create a so-called rotating field.

Various modifications may be made in the device embodying my invention without departing from the spirit and scope thereof, and all such modifications coming clearly within the scope of the appended claims shall be considered as part of my invention.

I claim as my invention:

1. In an electric-motor-driven, magnetic mixer, in combination, a base having a seat for supporting and locating a container thereon, an electric motor in said base, a first permanent magnet mounted in said base for rotation by said motor about substantially a vertical axis through the center of a container located on said seat, the poles of said first magnet being positioned to flank the lower portion of such container, and an agitator comprising a second permanent magnet with spaced poles adapted to be rotated in such container between said poles of said first magnet by the magnetic force exerted by said first magnet as it rotates and thereby carries its poles around the container. 7

2. The combination of claim 1 wherein said first magnet is a bar having a horizontal portion below said seat connected to said motor, and end portions extending upward therefrom to flank the position of a container on said seat.


' 4 REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,242,493 Stringham Oct. 9, 1917 1,420,774 Stainbrook June 27, 1922 1,984,975 Lodder Dec. 18, 1934 2,175,321 Safiir Oct. 10, 1939 2,356,784 Graham Aug. 29, 1944

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1242493 *Jan 12, 1917Oct 9, 1917Richard H StringhamElectrical drink-mixer.
US1420774 *May 9, 1922Jun 27, 1922Magnetic Drink Mixer CompanyElectrical drink mixer
US1984975 *Sep 27, 1934Dec 18, 1934Lodder William BAgitator
US2175321 *Dec 27, 1938Oct 10, 1939Jacob A SaffirDental amalgam mixer
US2356784 *Apr 7, 1942Aug 29, 1944Graham Maurice HCoffee pot
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2641452 *Jul 19, 1950Jun 9, 1953Otto WagnerElectromagnetic type of mixer
US2655354 *Aug 29, 1947Oct 13, 1953Pollard & JohnstonMixer and processor for home use and the like
US2702571 *Oct 4, 1949Feb 22, 1955Pollard & JohnstonMagnetically actuated food stirring device
US2945682 *Nov 4, 1957Jul 19, 1960Lee Hollingsworth RMixers and containers
US3116913 *May 29, 1961Jan 7, 1964Kingdon LaneLiquid agitating apparatus
US3168294 *Dec 20, 1960Feb 2, 1965Hasumura TadashiMixing apparatus wherein magnets are utilized
US3236503 *Oct 16, 1963Feb 22, 1966Eiichi IkedaApparatus for emulsifying bitumen and the like
US3265369 *Oct 9, 1964Aug 9, 1966Gen Ind CoDenture cleaners
US3362692 *Jan 13, 1966Jan 9, 1968Edmund F. IannoneContainer with stirring means
US3421528 *Oct 21, 1964Jan 14, 1969Forster James NeilDenture cleaning device
US4162855 *Mar 4, 1977Jul 31, 1979Spectroderm International, Inc.Magnetic stirrer apparatus
US4225248 *Jul 19, 1978Sep 30, 1980Para Serenella FDevice for mixing and metering the contents of containers, particularly for paints, dyes and the like, and shelf or shelving adopting such a device
US6318247 *Apr 2, 1998Nov 20, 2001Sunbeam Products, Inc.Appliance for preparation of heated and stirred beverages and foods
US6336603Jan 11, 2000Jan 8, 2002Island Oasis Frozen Cocktail Company, Inc.Food processing apparatus including magnetic drive
US6793167Nov 12, 2002Sep 21, 2004Island Oasis Cocktail Company, Inc.Food processing apparatus including magnetic drive
US7314307 *Jan 16, 2007Jan 1, 2008Ying Lin CaiAutomatic motor-driven blender cup with a leak-free magnetic stirring apparatus
US8474369 *Dec 21, 2004Jul 2, 2013Walter B. HerbstElectric skillet with magnetic self-reversing stirrer that is removable
US8480292 *Jun 1, 2010Jul 9, 2013Boris DushineSystems, apparatus and methods to reconstitute dehydrated drinks
US8621987 *Apr 22, 2013Jan 7, 2014Walter B. HerbstElectric skillet with magnetic self-reversing stirrer that is removable
US20110293807 *Jun 1, 2010Dec 1, 2011Boris DushineSystems, apparatus and methods to reconstitute dehydrated drinks
US20120002501 *Dec 29, 2010Jan 5, 2012Abbott LaboratoriesMixing system for mixing a powdered beverage with a liquid
EP0040328A1 *Apr 17, 1981Nov 25, 1981Dürr-Dental GmbH & Co. KGDeveloping apparatus with stirring facility
U.S. Classification366/274, 310/104, 366/325.4, 310/96, 417/420
International ClassificationA47J43/04, B01F13/00, B01F13/08, A47J43/046
Cooperative ClassificationB01F13/0827, A47J43/0465
European ClassificationA47J43/046A, B01F13/08D