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Publication numberUS3559962 A
Publication typeGrant
Publication dateFeb 2, 1971
Filing dateJun 10, 1968
Priority dateJun 10, 1968
Publication numberUS 3559962 A, US 3559962A, US-A-3559962, US3559962 A, US3559962A
InventorsEnssle Bruno E, Malec Jerry P
Original AssigneeBinks Res & Dev
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Stirring device
US 3559962 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

PATENTH} FEB 21974 mvsmons Bruno E. Enssle BY Jerry P. Malec Fly. 5

. ATTORNEY STIRRING DEVICE BACKGROUND It is common practice to store paints and other liquid materials in relatively large drums, and storage for any length of time immediately creates a problem of restoring the suspension of solid materials, such as pigments that settle out. Small containers can be handled conveniently in shaking devices which generate enough circulation of the liquid within the drum to restore suspension. In the case of large drums, however, the shaking equipment becomes prohibitively large and costly, and also involves handling procedures that become a nuisance. These problems have tended to cause liquids having a settle-out problem to be stored in containers that have an entire end removable. This arrangement permits the insertion of mixing devices and agitators functioning on the same general principle as a malted-milk mixer in a drug store.

There are a number of advantages, however, to handling liquids in bung-type containers, particularly when large quantities of material are involved. In the case of paints, it is undesirable to expose the surface of the liquid to air any more than is absolutely necessary. The formation of surface skin on a container of paint is very troublesome, and unnecessary exposure of the paint also creates a vapor problem within the work area.

SUMMARY OF THE INVENTION The present invention permits the use of large bung-type drums for storing liquids containing suspended solids, without interfering with the possibility of stirring the liquid to restore the suspended condition. A stirring action is provided by a rotor mounted on a shaft driven by any convenient form of portable motor unit, with the rotor having preferably a group of retractable vanes that can be placed in a position permitting insertion of the entire rotor through the bung opening, followed by extension of the vanes into operating position by the effect of centrifugal force, or by dynamic forces generated within the liquid through movement of the rotor.

DESCRIPTION OF THE DRAWING The several features of the invention will be analyzed in detail through a discussion of the particular embodiment illustrated in the drawing. In the drawing:

FIG. 1 is a perspective view showing a workman using the stirring device in a standard bung-type drum of liquid.

FIG. 2 is a perspective view on an enlarged scale, showing the rotor and shaft of the stirring device, with the vanes in the extended position.

FIG. 3 is a view of the device shown in FIG. 2, with the vanes in the retracted position.

FIG. 4 is a cross section through the axis of the rotor showing the configuration of the vanes and the hub for establishing the interacting stops defining the extended position of the vanes.

FIG. 5 is a perspective view on an enlarged scale, showing the rotor vane separately.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIG. 1, a standard drum has a bung opening 11 through which the stirring device has been inserted. The shaft 12 is driven by the conventional air motor 13 held in the workmans hand, and supplied with compressed air through the conduit 14. During the operation of the device, the shaft 12 rotates within the bung opening 11.

The primary stirring action is generated by the device in the position in which it appears in FIG. 2. The hub 15 is mounted on the shaft 12, possibly with the assistance of the adapter 16. The set screws 17 and 18 secure the hub with respect to the shaft. The hub is provided with a group of pairs of generally radially-extending lugs l920, 2l22, 23-24, and 25-26. The lugs constituting each pair are spaced apart sufficiently to receive the radially innermost ends of the vanes 27-30, respectively. These vanes are all formed as shown in FIG. 5. and are provided with the flat inner end portions 28 having the arcuate corner 29 concentric with the holes 30, which receive pivot pins in the position shown at 31 and 32. These pins traverse the pairs of mounting lugs, as well as the holes 30, with this mounting permitting limited rotation of the vanes in a plane containing the axis of the shaft 12. When the vanes are extended fully to the radial position shown in FIG. 2 (and in the position of the vane 29 in FIG. 4), the portion 33 of the vane comes in contact with the fixed structure of the hub, and prevents further swing-out movement of the vane 29, as shown in FIG. 4, in a counterclockwise direction. The movement of the vane from the position of the vane 27 in FIG. 4 to that of vane 29 can be accomplished by the action of centrifugal force, either separately or in conjunction with a dynamic force created by the inclination of the outer blade section 34 with respect to a plane perpendicular to the axis of the shaft 12. This inclination produces the well-known propeller action, and the rotation of the shaft 12 by the motor device 13 should be in such a direction as to induce movement of the vanes from the FIG. 3 position to the FIG. 2 position. The vanes normally depend downwardly (in the static condition of the device) to facilitate insertion into pg,5 the drum, and also to permit withdrawal from the drum after the stirring operation has been completed. It is important to assure that the direction of folding movement is not such that gravity will maintain an extended position of the vanes which would block withdrawal through the bung opening 11.

It is obvious that the use of the propeller action will serve not only to extend the vanes, but also to generate a very desirable degree of circulation within the liquid in the drum to induce a restoration of the suspended condition of any solids that may have settled out. If a device is carefully handled, it is also possible to use the unit in a slightly modified manner, in

which the rotor can be forced down into a settled mass of previously suspended material, and actually scrape it off the bottom of the drum. If the rotation of the motor 13 is reversed when the rotor device is near the bottom of the drum, the resulting dynamic forces on the vanes will tend to move them to the FIG. 3 position. However, the presence of the bottom of the container can be determined so as to permit the vanes to follow the bottom surface to produce a desirable scraping action. The inclination of the vanes under these operating conditions will tend to remove settled mass from the bottom of the container. Cleaning of the device after the stirring operation has been completed is an obviously simple procedure, since it merely involves immersing the unit in a suitable container of cleaning solution, and rotating it, preferably either intermittently, or in opposite directions, to flex the blades from the FIG. 2 to the FIG. 3 position.

The particular embodiments of the present invention which have been illustrated and discussed herein are for illustrative purposes only and are not to be considered as a limitation upon the scope of the appended claims. In these claims, it is our intent to claim the entire invention disclosed herein, except as we are limited by the prior art.

We claim:

1. In combination with a drum having a relatively small bung opening, a device for stirring the contents of said drum comprising:

a shaft insertable in said bung opening;

a hub normally mounted on said shaft, said hub having pairs of generally radially-extending lugs;

a vane rotatably mounted with respect to said hub between each of the lugs constituting said pairs, respectively, for movement between (a) retracted position in which said hub and vane are together insertable in said bung opening, and (b) extended position, said vane being induced to move outwardly and upwardly to extended position by movement of said shaft, said vanes having the portions thereof which are disposed between said lugs formed to provide a stop engageable with said hub to define the extended and retracted positions of said vanes, said vanes also having offset portions extending toward the axis of rotation of said hub in said retracted position and occupying the space opposite'th'e end of said huband shaft in said retracted positionfaiidlmeans tbrdfivirig said shaft.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1227671 *Dec 21, 1915May 29, 1917Borden S Condensed Milk CompanyFood and beverage mixer.
US3223389 *Feb 10, 1964Dec 14, 1965Clyde S SimmondsPaint mixer
US3455540 *Jan 4, 1968Jul 15, 1969Marcmann Emil GStirring device
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4083653 *Feb 14, 1977Apr 11, 1978Stiffler Hugh AStirring device
US4529513 *Oct 31, 1983Jul 16, 1985Deico Mac International, Inc.Anaerobic treatment for sewage
US4696449 *Nov 7, 1985Sep 29, 1987The Board Of Governors Of Ryerson Polytechnical InstituteSecurity device for electronic equipment
US4776761 *Jul 24, 1987Oct 11, 1988Octavio DiazArticulated blades ceiling fan-lamps combination
US4836687 *Apr 16, 1986Jun 6, 1989Oliver A. KardoesWaste pit stirrer
US4872764 *Jun 27, 1988Oct 10, 1989Breville R & D Pty. Ltd.Cocktail shaker
US4981367 *Jul 28, 1989Jan 1, 1991Stranco, Inc.Portable mixing apparatus
US5192131 *Jul 8, 1992Mar 9, 1993Hatfield Charlotte AStirring device
US5282681 *Jul 29, 1992Feb 1, 1994Cadence Environmental Energy, Inc.Portable agitator for fluidizing bottom solids in tanks
US5297867 *Mar 8, 1993Mar 29, 1994Holman Lanny DMixer apparatus
US5366289 *Dec 6, 1994Nov 22, 1994Cadence Environmental Energy, Inc.Portable agitator for fluidizing bottom solids in tanks
US5489151 *Nov 14, 1994Feb 6, 1996Uniroyal Chemical Company, Inc.Portable mixing device for use with fluid container having threaded opening
US5885001 *Jun 13, 1997Mar 23, 1999Cadence Technologies, Inc.Agitator assembly with a retractable blade assembly
US6076958 *Mar 30, 1999Jun 20, 2000Proquip, Inc.Impeller with folding blade and method for using the same
US6247837Dec 30, 1999Jun 19, 2001Floyd WardbergStir stick
US6749331 *Mar 28, 2002Jun 15, 2004Hughes Product DesignsFluid driven rotary agitator with suction conduit
US7441940 *Oct 23, 2003Oct 28, 2008Sport Usa, LlcCollapsible mixing wand
US7484879Sep 14, 2006Feb 3, 2009Hamilton Jr Ralph HStirrer tool with radially and distally extending flexible projections
US7578611Feb 2, 2009Aug 25, 2009Ralph HamiltonStirrer tool with radially and distally extending flexible projections
US8142156Aug 11, 2008Mar 27, 2012Rite-Hite Holding CorporationCeiling fans with low solidity ratio
US8192071 *Jul 16, 2008Jun 5, 2012Sartorius Stedim Biotech GmbhAgitator apparatus with collapsible impeller
US20130188441 *Sep 14, 2012Jul 25, 2013Spx CorporationMixer assembly apparatus and method
US20130188445 *Sep 13, 2012Jul 25, 2013Spx CorporationImpeller assembly apparatus and method
EP1724008A1 *May 2, 2006Nov 22, 2006Lauro GuerraSwivel mixer for liquids in containers with small-dimension opening
EP2638955A1 *Mar 14, 2012Sep 18, 2013Challenging Innovation LimitedMixing tool, device for mixing the content of a container, and method of manufacturing a mixing tool
WO2007047107A2 *Oct 5, 2006Apr 26, 2007Ralph H HamiltonStirrer tool
WO2008110606A1 *Mar 13, 2008Sep 18, 2008Fluid Management IncAgitating canister for viscous fluids for a multiple fluid dispenser
WO2013136038A1 *Mar 11, 2013Sep 19, 2013Challenging Innovation LimitedApparatus for mixing contens of a receptacle, and method of manufacturing such a mixing apparatus
U.S. Classification366/308, 416/142
International ClassificationB01F15/00, B01F7/00
Cooperative ClassificationB01F7/00066
European ClassificationB01F7/00B10C2