US2558455A - Motor-driven brush assembly - Google Patents

Description

June 26, 1951 NQVAK MOTOR-DRIVEN BRUSH ASSEMBLY Filed July 6, 1948 INVENTOR. FRANK NOVA l fwd,

ATTORNEYS Patented June 26, 1951 UNITED STATES PATENT OFFICE 1 Claim. (Cl. -,23)

This invention relates to improvements in motor-driven brushes, and more particularly to a portable, motor-driven brush for cleaning dairy cattle and for similar purposes.

It is among the objects of the invention to provide an improved motor-driven brush which is of small size and light weight so that it can be conveniently held in the hand for use, which has a handle providing a comfortable grip, includes means rendering the brush component quickly and readily interchangeable, which requires only a small amount of power for its operation, and can be plugged into conveniently located electrical outlets, and which is simple and durable in construction and economical to manufacture.

Other objects and advantages will become apparent from a consideration of theiollowing description and the appended claim in conjunction with the accompanying drawing, wherein:

Figure 1 is a top plan view of a portable, motordriven brush illustrative of the invention and a fragmentary portion of a power-supplying line for the brush, portions being broken away and shown in cross-section to better illustrate the construction thereof Figure 2 is an end elevation of the brush, a portion of the end cover or arm being broken away and shown in cross-section to better illustrate the construction of the brush;

Figure 3 is a transverse cross-section taken substantially on the line 33 of Figure 1; and

Figure 4 is a longitudinal cross-section on a somewhat enlarged scale taken substantially on the line 4-4 of Figure 1.

With continued reference to the drawing, there is illustrated in Figure 1 a power line I!) having spaced-apart outlets ll electrically connected therein for the reception of a plug, such as the plug I2 connected to the brush, generally indicated at I3, by the flexible cord [4. Where the brush is to be used for cleaning cattle in a dairy barn the outlets II will be secured to a wall or other supporting structure, preferably one within easy reach of each cow stanchion so that it will not be necessary to provide a long cord M for the brush. The line Ill is connected to a power line by suitable means, such as the plug I5 insertable into a convenient outlet provided in the building.

The brush l3 comprises a small electric motor having a cylindrical housing l6 provided in each end with ventilating openings I1 and having a motor shaft [8 projecting from one end of the housing. Two arms [9 and are secured, one to each end of the motor housing, and extend radially outwardly from the motor housing in the same direction. A handle 2| is secured to the side of the motor housing opposite the side from which the arms l9 and 26 extend, and is disposed longitudinally of the motor housing to provide a comfortable grip for handling the brush.

l. .A belt pulley 22 is secured on the projecting end of the motor shaft [8. A hollow boss 23 is secured to the outer side of arm 19 near the outer end of the arm by suitable means, such as welding or soldering, and a ball bearing 24 is secured in this boss by suitable means, such as the snap ring 25. A stud 26 is journaled in the bearing and extends through an aperture in the arm [9 and is provided in its inner end with a bore or recess receiving the adjacent end of the cylindrical core 21 of the brush component, generally indicated at 28, and with a transverse notch 29 receiving a pin 30 extending transversely through the brush core to provide a driving connection between the stud and the brush. A belt pulley 3| is secured on the outer end of stud 26 and a belt 32 drivingly connects the belt pulleys 22 and 31. An elongated, cup-shaped cover 33 is secured to arm 13 enclosing the belt pulleys 22 and 3| and the belt 32. The arm 20 is provided with an outwardly-extending, hollow boss 34 which slidably receives a cup 35 in which is secured a ball bearing 36 similar to the ball bearing 24. A stud 31 is mounted in ball bearing 36 and provided in its inner end with a recess 31 receiving the adjacent end of the brush core 21, movement of the end of the brush core into the recess preferably being limited by an abutment washer 38 secured on the brush core. A cup-shaped housing 39 is externally screw threaded onto the boss 34 and encloses the bearing-retaining cup 35 with its'end wall spaced outwardly from the end wall of the bearing-retaining cup. This housing is provided in its outer end with an apertured boss 40 and a pin 41 having on its outer end a head 42 extending slidably through the boss 40, and is screw threaded at its inner end into an apertured boss 43 provided on the end wall of the bearing-retaining cup 35. A compression spring 44 is disposed in the housing 39 and operative between the bearing-retaining cup 35 and the end wall of the housing 39 to resiliently urge the bearing inwardly so that the recess 31 in stud 31 receives the adjacent end of the brush core.

When it is desired to release the brush from the arms, the head 42 of pin 4| is pulled outwardly, thereby removing stud 31 from the adjacent end of the brush core, whereupon the brush compo- 3 nent 28 may be removed and another component substituted therefor.

A transversely-curved guard plat 45 is secured to'the motor housing 16 adjacent the brush 28 with its concave surface facing the brush and spaced therefrom. The sides of the guard plate may be extended around the brush, as may be found convenient or necessary, so that the brush will not throw any material removed thereby toward the operator of the brush.

The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiment is, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the-appended claim rather than by the foregoingdescription, and all changes which come within the meaning and range of equivalency of the claim are,'therefore, intended to be embraced therein.

What is claimed is: In a portable brush assembly including an elongated motor housing having opposite ends, arms secured to said motor housing at the respectively opposite ends of the latter and pro-.

therein, an anti-friction bearing secured in one.

of said bosses, a stud secured in said bearing and projecting through the aperture in the corresponding arm, said stud having a recessed and transversely notched end receiving the adjacent end of the brush core, a pin extending through said core and received in said notch, a belt pulley on said stud at the opposite end thereof, a cup slidable in the other of said bosses and having an open end adjacent the associated arm and an end wall at its other end, a housing secured to said other boss and enclosing said cup and having an end wall spaced from the end wall of said cup, an anti-friction bearing secured in said cup, a stud secured in said last mentioned bearing and projecting through the aperture in the associated arm, the last mentioned stud having'a recessed end receiving the adjacent end of the brush core, a compression spring disposed in said housing between the end wall of said cup and the end wall of said cup housing to resiliently maintain the brush core seated in said last mentioned stud, said cup housing having an aperture in its end wall, a pin secured at one end'to said cup and extending through the aperture in the housing end wall, and a head on said pin at the outer side of said cup housing for moving said cup against,

the force of said spring to release the brush core from said last mentioned stud.

FRANK NOVAK.

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

UNITED STATES PATENTS Number Name Date 1,576,196 Kemmis Mar. 9, 1926 1,593,803 McDonald July 27, 1926 1,816,054 Pelkey July 28, 1931 1,991,794 Cutright Feb; 19, 1935 2,038,648 De Lange Apr. 28, 1936

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