US 3552723 A
Description (OCR text may contain errors)
United States Patent  inventor William W. Stefany Bernardsville, NJ.  Appl. No. 767,779  Filed Oct. 15, 1968  Patented Jan. 5, 1971  Assignee Red Devil Incorporated Union, NJ. a corporation of New Jersey  PAINT STIRRER 3 Claims, 4 Drawing Figs.
 U.S. Cl 259/56 B0lfll/00 Field of Search 259/54, 56, 72, 75
 References Cited UNITED STATES PATENTS 1,908,561 5/1933 Schletz et al 259/56 3,437,317 4/1969 Micin 259/75 Primary Examiner-William I. Price Attorney-Albert F. Kronman ABSTRACT: A device for stirring paint within sealed cansjn which the can is given an unequal rocking motion about a pivot point causing the paint to circulate in one direction within the can.
PATENTEDJAN 5m $552,723
SHEET 3 OF 3 llll will 1 PAINT STIRRER BACKGROUND or; THE INVENTION Where it is desired to homogenize or mix the contents of a can of paint or other viscous or separable material it has been the practice to clamp the sealed can within a motor driven shaker. Because of the violent action of such shaking devices it was necessary that they be securely anchored to the floor making their installation substantially permanent. In addition, a very powerful clamp was required to secure the can in place during the shaking operation. Such clamping devices required a considerable time to tighten and loosen during each'mixing cycle. Opening a can to add a desired amount of coloring or tinting material was also a time consuming operation.
SUMMARY OF THE INVENTION The present invention, in a preferred embodiment, employs two spaced rockablecra'dle" members mounted upon a rigid frame. A series of can receiving wells are providedin the eradle members. Each of the cradle members are coupled to a motor driven crank which rocks them first in one direction and then in the opposite direction about a pivot point. The travel in one direction is governed by the crank to exceed the travel in the opposite direction. As a result of the dissimilar forces acting upon the cans 'within the cradles, the contents of the cans is caused to flow or circulate in one direction, rapidly stirring and homogenizing the contents.
DESCRIPTION OF THE DRAWINGS DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to the drawings, l indicates a paint stirring machine having a frame 11. The frame 11 consists of a base 12 formed of four channel iron members 13 welded together into a rectangular configuration. Upstanding angle iron members 14 are welded to the base 12 at each corner thereof. Cross top braces 15 made of angle iron are welded to the upstanding members 14 at each end of the frame I1.
Power for the paint stirring machine is provided by an electric motor 16 which is supported on a small platform 17 formed of channel iron strips weldedat each end across the.
base 12. The motor 16 is bolted to the strips of the platform 17 in the usual manner.
Longitudinally disposed angle iron strips 18 are welded at each end to the upstanding members 14 between the base 12 and the top braces 15. Spaced transverse channel members 19 are secured to the strips 18 as by welding. Two, spaced pillow blocks 20, 21 are bolted to the channel members 19 to freely support a shaft 22.
'A pulley 23 is keyed or otherwise secured to one end of the shaft 22 and a cranklike eccentric 24 is secured to the opposite end of the shaft. Rotary power is transferred from the motor 16 by way of its output shaft pulley 25 and V-belts 26 to the pulley 23. 1
Two sets of spaced pillow blocks 27, 28 are bolted to the cross top braces l5 at each end of the frame 11. The pillow blocks 27, 28 serve to swingably support two cradles 29, 30.
The cradles 29, 30, as best shown in FIGS. 1 and 2 are made up of a series of segments 31 welded or otherwise secured together laterally. Each segment, which may be a metal casting, includes a paint can receiving well 32 and outwardly extending stub shafts 33. Adjacent segments are secured together at the stub shafts 33 to form an elongated cradle assembly. Friction strips 42 of rubber or the like are cemented within each well 32 to retain the cans therein.
The stub shafts 33 are located below the transverse center line of the wells 32 as best shown in FIG. I. This disposition of the stub shafts 33 contributes to the circulating action of the paint within the cans asit imparts av whip to the upper part of the cans as they rock from side to side.
The wells 32 may be provided with recesses 34 at the top thereof to receive the outwardly extending bail securing portion of the can as best shown in FIG. I. One or more of the receiving wells 32 may also be provided with a reduced diameter well 35 in the bottom thereof to receive cans of smaller diameter such as quart size cans.
I An actuating lever 36 best shown in FIGS. 1. 3, and 4, is secured'at one end to the axle members 37 which are keyed or otherwise secured to the outermost stub shafts 33 of the cradle 29, 30, and which are journaled within the sets of pillow blocks 27, 28. The free end of the levers 36 are coupled to a .link 38, 39, which in turn is journaled upon a drive rod carried by the cranklike eccentric 24.
The operation of the present device will be apparent from the foregoirigand an examination of FIGS. 3 and 4. With the paint cans placed within the wells 32 of the cradles 2 9, 30, the motor 16 is started and the rotary power transferred from the motor pulley 25 to the pulley 23 by way of the V-belts 26. The shaft 22 is rotated carrying with'it the eccentric crank 24. As the drive pin 40 turns with the crank 24, the arms 38, 39 are caused to move in a generally vertical up and down motion imparting a rocking motion to the cradles 29, 30, by way of the levers 36. By reason of the geometry of the arms 38, 39, and the levers 36, the cradles 29, 30, will be caused to rock through a greater angle in one direction than in the other. As shown'in FIG. 3, the wells 32 will swing through an angle of 21 on the outward travel and 15 on the inward travel. This dissimilar travel of the wells and the cans therein results in a greater force acting upon the contents of the can during onehalf of the cycle than during the other. The contents are thus material within the can.
The symmetric arrangement of the cradles 29, 30, about the stirring device permits thedevice to operate without undue vibration and without moving around on the floor. It has been found that conventional rubber suction cups 41 secured to the base of the device will keep it in place during use.
From the foregoing it will be seen that there has been provided a device for stirring paint or other viscous materials capable of handling a large number of cans simultaneously or individual cans if required without the necessity for clamping each can into the machine. The can contents can be mixed in a short period of time and can lids can be opened and closed without the need for operating can clamping structures.
1. 'A stirring machine for cans of viscous material comprising a frame, spaced cradle members rockably supported by said frame, asource of rotary power on said frame, crank means driven by said rotary power source, a link coupled to the crank means at one end and to one-of the cradle means at its other end, at least one can receiving well in each of the cradle members and outwardly extending stub shafts secured to the well below the transverse center line of the well to rockably support the well.
2. A machine according to claiml in which an actuating lever is secured to the end of each cradle member and freely coupled tothe end of the link. I
3. A machine according to claim 2 .in which the combined crank means, link and actuating lever impart a rotationto the cradle members about the vertical of 15 in one direction and 20 in the opposite direction.