US3318581A - Mixing device - Google Patents

Description

y 1967 J. T. DOUGHERTY 3,318,581

MIXING DEVICE Filed July 11, 1966 INVENTOR.

Jwmes T Dougherb y BY 9W &

ATTORNEYS United States Patent Ofiice 3,318,581 Patented May 9, 1967 3,318,581 RHXING DEVICE James T. Daugherty, 3125 Dunbar-ton Drive NW., Canton, Ohio 44708 Filed July 11, 1966, Ser. No. 564,294 6 Claims. (Cl. 259-72) The invention relates to mixing devices for use in paint stores, hardware stores, automobile body and paint shops, laboratories, and other places Where it is frequently necessary to shake cans of paint and other materials which may have been sitting in one position for a considerable length of time so that the pigments and other solid ingredients have settled to the bottom of the can.

Such devices as are at present in general use for this purpose are quite expensive, and furthermore they are not entirely satisfactory as they receive a paint can in a somewhat upright position slightly oscillating the can while shaking it laterally, and this treatment does not thoroughly mix the paint.

The object of the invention is to provide a simple, inexpensive and easily operated device for shaking a com tainer to thoroughly mix the ingredients therein.

Another object of the invention is to provide a mixer of the character referred to in which the container is continuously slowly rotated end for end in one direction, Ivhile at the same time being rapidly reciprocated lateral- A further object of the invention is to provide such a device with means for receiving and holding a quart, pint or half-pint size can of paint or other material and thoroughly mixing the same.

The above objects together with others which will be apparent from the drawing and following description, or which may be later referred to, may be attained by constructing the improved mixer in the manner hereinafter described in detail and illustrated in the accompanying drawing.

In general terms the invention may be briefly described as comprising a paint-shaking device which may be mounted upon a portable base plate or the like, and which comprises an electric motor, a gear reduction operatively connected to the motor as by a belt and pulley, a rotatable, longitudinally reciprocal shaft mounted in bearings supported upon the base plate and having at one end a can holder, a relatively slowly rotating pulley upon the gear reduction being connected by a belt to a pulley upon the rotatable shaft and slowly rotating the can holder, and a relatively rapidly rotating pitman wheel upon the gear reduction being connected by a pitman rod to a ring rotatable upon said shaft and held against relative longitudinal movement thereon for rapidly reciprocating the can holder.

The can holder has a clamping screw adapted to normally clamp a quart can of paint therein. An adapter is provided for insertion into the can holder so that either a pint or half-pint can of paint may be clamped therein as desired.

A preferred embodiment of the invention as applied to a paint mixer is illustrated in the drawing, in which:

FIG. 1 is a top plan view of a paint mixing device embodying the invention;

FIG. 2 is a side elevation of the device shown in FIG. 1; and,

FIG. 3 is a detached sectional view of the can holder, showing the adapter for clamping pint and half-pint cans therein.

Referring now more particularly to the embodiment illustrated in the drawing, in which similar numerals refer to similar parts throughout, the device may be portable and mounted upon a base plate indicated at 1, which may be a rectangular metal plate on which is mounted the electric motor, indicated generally at 2, as by screws 3 located through the base flanges or feet 4 of the motor and into the base plate 1.

The motor shaft 5 is shown with a small V-pulley 6 fixed thereto as by the set screw 7 located through the hub 8 of the pulley. Adjacent to the motor 2 a gear reduction 9 is located, being shown in the drawing as fixed upon a support .10 as by screws 11, the support being fixed upon the base plate as by screws 12.

The drive shaft 13 for the gear reduction 9 has a relatively large diameter pulley 14 fixed thereon as by the set screw 15 in the hub 16 of the pulley. The pulley 14 is connected to the motor pulley 6 as by the V-belt 17.

A shaft 18 is rotatably and longitudinally reciprocally mounted in bearings 19 which are shown as secured upon the upper ends of posts 20 as by bolts 21 located through ears 22 upon the bearings .and through the flanges 23 at the upper ends of the posts. The posts 20 are secured to the base plate 1 as by screws 24 located through the lower flanges 25 on the posts.

A relatively slowly rotating driven shaft 26 upon the gear reduction 9 has a V-pulley 27 fixed thereon as by a set screw 28 in the hub 29 of the pulley. This pulley is connected as by belt 30 with pulley 31 fixed upon the rotatable and reciprocal shaft 18 as by a screw 32 in the hub 33 of the pulley 31.

A relatively rapidly rotating driven shaft 34 upon the gear reduction has 'a pitman wheel 35 fixed thereon as by the set screw 36. A pitman rod 37 is pivotally connected at one end to the wrist pin 38 upon the pitman Wheel 35. The other end of the pitman rod 37 is pivotally connected to a stud 39 upon a ring 40 which is rotatably mounted upon the shaft 18 and held against longitudinal movement relative to said shaft as by the collars 41 fixe to the shaft 18 as by set screws 42.

The paint can holder, indicated generally at 43, is fixed upon one end of the rotatable and reciprocal shaft 18 as by the nuts 44 and is in the form of a yoke having the spaced flanges 45 and 46 between which a paint can is adapted tobe inserted. The flange 46 has an internally threaded boss 47 through which is located the clamping screw 48 having the clamping disc 49 upon its inner end.

As shown in FIGS. 1 and 2, a quart can of paint, as indicated at 50, may be clamped between the flanges 45 and the clamping disc 49. A conventional flexible electric cord 51 may be connected to the motor 2 and provided with conventional plug-in points for attachment to an electric circuit in usual and well known manner.

With a can of paint, as shown at 50, clamped within the holder 43, when the motor'2 is energized the gear reduction 9 will be driven thereby through the pulleys 6 and 14 and belt 17. The shaft 18 will be very slowly rotated by the pulleys 27 and 31 and belt 30 and will be very rapidly reciprocated longitudinally by the pitman wheel 35, pitman rod 37 and ring 40.

The holder 43, with the can of paint clamped therein, will be slowly rotated end over end, by the shaft 18, this rotation being preferably anywhere from 4 to 9 rotations a minute, while the holder 43, with the paint can is at the same time rapidly reciprocated laterally by longitudinal reciprocation of the shaft 18, this reciprocation being preferably at the rate of 400 or more per minute.

By actual experience, it has been found that this continual rotation of the can, end for end, while it is rapidly reciprocated laterally causes the solid ingredients which have settled to the bottom of the can to be thoroughly intermixed with the liquid contents of the paint in a much more satisfactory manner than is possible with such paint mixing devices as are now in general use.

In order to hold pint or half-pint cans of paint in the holder 43, an adapter, indicated generally at 52 in FIG. 3, may be provided. This adapter is of hollow, cylindrical larger diameter end 53 being located against the clamping.

flange 45 of the holder, while the smaller diameter end 54 receives one end of the half-pint can shown in broken lines at 56, the other end of the can being received against the clamping disc 49.

It should be understood that for mixing larger cans such as gallon cans of paint, the holder 43 may be increased in size so as to clamp the ends of a gallon can between the flange 45 of the holdenand the clamping disc 49 thereof.

A preferred rate of speed of the device, which has been found to give highly satisfactory results in actual practice, is seven revolutions of the shaft 18 per minute while said shaft is simultaneously being reciprocated at the 7 rate of 430 reciprocations per minute.

Although the specific embodiment of the invention illustrated and above described in detail shows the invention as applied to a paint mixer, it should be understood that the invention is not limited to paint mixers but is applicable to devices for mixing and homogenizing various materials containing liquids and solids, or liquids of various Weights.

' In the foregoing description certain terms have been used for brevity, clearness and understanding, but no unnecessary limitations are to be implied therefrom beyond the requirements of the prior art, because such words are used for descriptive purposes herein and are intended to be broadly construed.

7 Moreover, the embodiments of the improved construction illustrated and described herein are by way of example, and the scope of the present inventionis not limited to the exact details of construction.

Having now described the invention or discoveryfthe construction, the operation, and use of preferred'embodiments thereof, and the advantageous new and useful results obtained thereby; the new and useful construction, and reasonable mechanical equivalents thereof obvious to those skilled in the art, are set forth in the appended claims. 7 7

I claim:

1. A mixing device comprising a, driven shaft, bearing means supporting said shaft for rotation around its axis, a

. and for longitudinal reciprocation along said axis, a can holder at one endof said shaft, means upon said holder for clamping a can therein at right angles to the axis of said shaft, means for continuously rotating said shaft in one direction, and means for simultaneously reciprocating said shaft longitudinally so as to continuously rotate the can end over end and simultaneously reciprocate it laterally. I 2. A mixing device as defined in claim 1, in which the shaft is continuously rotated in one direction at a relatively low speed and reciprocated longitudinally at a relatively high speed.

3. A mixing device as defined in claim 2, in which a power-driven gear reduction drives said shaft, there being a relatively low speed driven pulley on said gear reduction and a belt connecting said pulley to a pulley on the shaft for continuously rotating the shaft inone direction, and a.

relatively high speed driven pitrnan wheel-on the gearireduction connected by a pitman rod to a ring rotatably mounted upon said shaft and held against longitudinal movement relative thereto, for simultaneously rapidly reciprocating said shaft.

4. A mixing device as defined in claim -1, in which the shaft is continuously rotated in one direction at a speed of about 4 to 9 rotations per minute and simultaneouslyreciprocated longitudinally at a speed of about 400 recip rocations per minute. r

5. A mixing device as defined in claim 1, in

of about 7 rotations per minute and simultaneously reciprocated longitudinally at a speed of about 430 reciproreceiving one end of a, pint can, the other end of which i is' in contact with said clamping disc, and said adapter having a small diameter end for receiving; one end of' r a half-pint can,.the other end of which is in contact .with

said clamping disc.

References Cited by the Examiner a Y UNITED STATES PATENTS.

2,527,556 10/1950 KOSt 259-72 2,599,833 6/1952 Holmluud 2-59 72 2,797,902 7/1957 Beugler 25972 2,894,309 7/1959 Brzowski -u 259"72, 7 3,018,092 1/1962 WALTER A. SCHEEL, Primary Examiner.

R. W. JENKINS, Assistant Examiner.

which the. shaft is continuously rotated in one. direction at a speed Jorgenson 25 9-42, a

Johnson 259-72 9

Claims (1)

1. A MIXING DEVICE COMPRISING A DRIVEN SHAFT, BEARING MEANS SUPPORTING SAID SHAFT FOR ROTATION AROUND ITS AXIS, AND FOR LONGITUDINAL RECIPROCATION ALONG SAID AXIS, A CAN HOLDER AT ONE END OF SAID SHAFT, MEANS UPON SAID HOLDER FOR CLAMPING A CAN THEREIN AT RIGHT ANGLES TO THE AXIS OF SAID SHAFT, MEANS FOR CONTINUOUSLY ROTATING SAID SHAFT IN ONE DIRECTION, AND MEANS FOR SIMULTANEOUSLY RECIPROCATING

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