Title:
Paint mixer
United States Patent 2027297


Abstract:
This invention relates to mixing devices, more particularly to paint mixing devices and has for an object to provide a novel assembly of cover to fit the top of a standard paint can, a manually rotatable shaft projecting through the cover and paddles on the shaft below the cover for agitating...



Inventors:
Frank, Tramposch
Application Number:
US2586435A
Publication Date:
01/07/1936
Filing Date:
06/10/1935
Assignee:
Frank, Tramposch
Primary Class:
Other Classes:
366/285, 366/605
International Classes:
B01F13/00; B44D3/06; B01F7/00; B01F15/00
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Description:

This invention relates to mixing devices, more particularly to paint mixing devices and has for an object to provide a novel assembly of cover to fit the top of a standard paint can, a manually rotatable shaft projecting through the cover and paddles on the shaft below the cover for agitating the paint.

A further object is to provide novel paddles which are hinged to the shaft so that they may be extended radially from the shaft to agitate the paint, or may be swung to nested position laterally of the shaft to permit easy withdrawal from the paint after the mixing operation is completed.

A further object is to provide a novel locking collar on the shaft for holding the paddles in radial position or releasing the paddles to be swung to nested position.

With the above and other objects in view the invention consists of certain novel details of construction and combinations of parts hereinafter fully described and claimed, it being understood that various modifications may be resorted to within the scope of the appended claims without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings forming part of this specification, Figure 1 is a longitudinal sectional view 3o through a paint mixer constructed in accordance with my invention.

Figure 2 is a side elevation of the mixing device with the paddles shown in nested position and with the shaft rotating gearing removed. Figure 3 is a cross sectional view taken on the line 3-3 of Figure 1.

Figure 4 is a longitudinal sectional view of a modified form of the invention.

Figure 5 is a cross sectional view taken on the line 5-5 of Figure 4.

Figure 6 is a fragmentary detail view of the paddles and shaft.

Referring now to the drawings in which like characters of reference designate similar parts in the various views, the mixing device is shown to comprise a shaft 10 which is equipped with a housing II having an integral dome shaped cover It on the bottom provided with a U-shaped resilient rim 13, of the usual crimped type adapted to interfit with the similarly shaped crimped rim 14 of a standard paint can 15.

The shaft is equipped with a plurality of paddles 16, preferably four in number, and two of the paddles diametrically opposite each other are provided with horizontal slots 17 while the other two paddles diametrically opposite each other are provided with vertical slots 18, these slots permitting escape of the paint through the paddles during the mixing operation. The paddles are of sufficient width to extend nearly to the I inner surface of the can wall and are of sufficient height to extend nearly to the bottom of the can, and to within approximately threefourths of the height of the can from the top of the can, so that the paint will be scraped from the wall and the bottom of the can when the paddles are rotated.

The paddles are provided with interdigitating hinge eyes 19 which loosely surround the shaft and permit of the paddles being disposed radially on the shaft as shown in Figure 1, or permit of the paddles being swung to nested position laterally of the shaft to permit easy withdrawal after the mixing operation is completed. For holding the paddles assembled on the shaft a cap bearing 20 is secured to the bottom of the shaft by means of a set screw 21 which is received in a groove 22 in the shaft, and as shown at 23 the paddles are.cut away at the bottom to receive the cap bearing. The bearing rests upon the bottom of the paint can during the mixing operation and forms a rigid stationary support for the shaft in the paint can.

For locking the paddles in radial position an annulus or collar 24 is slidably fitted on the shaft above the paddles and is provided with a flared skirt 25 which terminates in a cylindrical flange 26 having slots 27 formed therein at the ends of two diameters of the flange to receive the upper edges of the paddles 16 and space the paddies a quadrant apart from each other. A set screw 27 forms means for adjustably securing the collar to the shaft so that the collar may be locked to hold the paddles in radial position, or may be released and backed off from the paddles to free the paddles whereupon a slight turn of the shaft 10 will cause the paddles to feather in the mixed paint and assume a nested position laterally of the shaft, as shown in Figure 2, to permit easy withdrawal. For rotating the shaft manually a bevel pinion 28 is provided with an integral housing 29 which surrounds the shaft 10 and is fixed thereto by a set screw 30. A standard ball bearing assembly 31 is mounted on the shaft and separates the cover housing II from the pinion housing 29. A stub shaft 32 extends through the pinion and is secured to the pinion housing and to an extension 33 of the pinion housing by means of set screws 34 so that the shaft rotates as a unit with the 0 pinion. A stationary housing 35 receives the stub shaft 32 and is provided with a pinion 36 which is received in a circumferential groove 37 in the stub shaft to permit the shaft to rotate while the housing remains stationary.

A bevel gear 38 meshes with the bevel pinion 28 and is rotatably mounted on a stationary shaft 39 which passes through the stationary housing 35 and is secured thereto by a nut 40. The bevel gear is equipped with a crank handle 41 having a wood or similar grip 42. Preferably the gear ratio is 3 to 1 so that the paddles may be turned approximately one hundred and eighty revolutions per minute, whereby a gallon of paint may be thoroughly mixed in approximately one and one-half minutes.

A spade grip 43 is provided with a shank 44 which is screwed into the stationary housing 35 and anchored by a pin 45. The spade grip promotes manipulation of the mixing device such as for example applying the device to a paint can, removing the device from a paint can or adjusting the height of the paddles in the paint can as will be understood.

A modified form of the invention is shown in Figure 4 in which 46 designates a shaft which is rotatably mounted in a housing 41 having integral therewith a dome shaped cover 48 which is provided with a resilient U-shaped rim 49 or crimped rim as it is commonly known, adapted to be received in the similarly shaped crimped rim 50 of a paint can 51. In this embodiment of the invention the shaft is equipped with rigid or non-folding paddles 52 which are mounted on a sleeve 53 and extend radially therefrom. The sleeve is removably secured to the shaft by a set screw 54, and as in the preferred form of the invention, two of the paddles disposed diametrically opposite each other are formed with longitudinal slots 55 and the other two paddles disposed diametrically opposite each other are formed with transverse slots 56 to permit the paint to flow through the paddles during the mixing operation.

A cap bearing 57 is secured to the shaft 46 by means of a screw 58 which is received in a slot 59 in the shaft, and the paddles are cut away as shown at 60 to receive the cap bearing.

A crank handle 61 is provided with a counterbore 62 which receives the upper end of the shaft 46 and is rigidly secured to the shaft by a set screw 63. A standard ball bearing assembly 64 separates the stationary housing 47 from the counterbored end of the crank handle 61.

85 In operation the paddles shown in Figure 1 are folded together to lie in nested position laterally of the shaft and are then-inserted in the paint can. The paddles are now manually spread apart to assume radial position whereupon the locking annulus 25 is slipped down until the upper edges of the paddles enter the slots 27. The set screw is now applied to lock the annulus in place. The cover 12 is now applied to the crimped rim of the paint can. The crank handle may now be turned to rotate the shaft and rotate the paddles. When the mixing operation is completed the set screw 30 may be loosened to permit the gearing to be o1 detached whereupon the cover 12 may be raised.

The set screw 27 is now loosened and the locking annulus backed off from the paddles. The shaft is now given a turn to allow the paddles to feather and be nested together laterally of the 15 shaft to facilitate easy removal from the mixed paint.

From the above description it is thought that the construction and operation of my invention will be fully understood without further explana- 20 tion.

What is claimed is: 1. A mixing device comprising a shaft, paddles, interdigitating hinge eyes securing the paddles at the inner ends to the shaft and permitting the paddles to fold flat upon each other, an annulus adjustably mounted on the shaft and having slots adapted to receive the upper edges of the paddles and hold the paddles radially, disengagement of the annulus from the paddles permitting the paddies to be nested together laterally of the shaft to permit easy withdrawal from a container, and means for rotating the shaft.

2. A mixing device comprising a shaft, a plurality of paddles having interdigitating hinge eyes loosely mounted on the shaft and permitting the paddles to extend radially from the shaft and permitting the paddles to be nested together laterally of the shaft, an annulus slidably mounted on the shaft having notches to receive the upper edges of the paddles for locking the paddles to extend radially from the shaft, and means for rotating the shaft.

3. A paint mixing device comprising a shaft, a housing for the shaft, a cover on the housing 15 having a resilient rim adapted to interfit with the rim of a paint can, paddles having interdigitating eyes adapted to swivel on the shaft below the cover and adapted to permit the paddles to extend radially from the shaft and to be swung to nested position laterally of the shaft, an annulus slidably mounted on the shaft having slots receiving the upper edges of the paddles for locking the paddles in radial position, and gear mechanism for manually rotating the shaft. FRANK TRAMPOSCH.