US1240017A - Paint-brush. - Google Patents

Description

F. L. BENEDICT.

PAINT BRUSH.

APPLICATION FILED NOV. 9. 19I6.

Patented Sept. 11, 1917.

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PAINT BRUSH.

APPLICATION FILED NOV. 9. 1916.

Patented Sept. 11, 1917.

2 SHEETSSHEET 2.

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A TTOR/VE VS FRANK LEE BENEDICT, OF HARRISBURG, PENNSYLVANIA.

PAINT-BRUSH.

Specification of Letters Patent.

Patented Sept. 11., 1199117..

Application filed November 9, 1916. Serial No. 130,320.

To all whom it may concern.-

Be it known that I, FRANK L. BENEDICT, a citizen of the United States, and a resident of Harrisburg, in the county of Dauphin and State of Pennsylvania, have invented a new and Improved Paint-Brush, of which the following is a full, clear, and exact description. This invention relates to paint brushes and particularly to rotary brushes, and has for an object the provision of an improved construction whereby the device may be used for properly applying paint or may be used for cleaning a surface preparatory to receiving paint or other coating material.

Another object in view is to provide a paint brush in which the paint is sprayed over the surface and substantially simultaneously spread by rotating brushes, whereby a proper distribution is produced as well as a rubbing in of the paint.

A still further object in view is to provide a device for applying paint which utilizes an air, spray for distributing the paint and rotating brushes operated by air under pressure, the exhaust of which operates the air spray.

In the accompanying drawings:

Figure 1 is a front view of a device embodying the invention.

Fig. 2'is a side view of the structure shown in Fig. 1.

Fig. 3 is a rear view of the device shown in Fig. 1.

Fig. 4 is an enlarged detail fragmentary longitudinal sectional view through the spray device, part of the brushes being shown in connection therewith. I

Fig. 5 is a top plan view of the spray device shown in Fig. 4.

Fig. 6 is an enlarged detail fragmentary sectional view showing how the brushes may be applied and removed and how they are held in place when in operative position.

Referring to the accompanying drawings by numerals, 1 indicates a casing formed of sheet metal or other desired material and 2 a stifi'ening channel iron which not only stifi'ens the casing but acts as a support for the gears in the hood 3. In order to stiffen the back of the casing a channel iron 4 is provided whereby the handle 5 may be se cured to the casing and to the channel iron 4 so as to properly move the entire device as may be desired.

Arranged Within the caslng 1 are brushes same are connected to 6 and 7 which are designed to spread the palnt after the same has been applied, the paint being supplied by the discharge member shown in Fig. 4, which discharge member comprises a paint supply pipe 8 and an air supply pipe 9. Pipe 8 is provided with a dlscharge opening 10 registering with the opening 11 in the distributing pan 12. A needle valve 13 is arranged at the end of pipe 8 and is adapted to move across the opening 10 so as to control the amount of paint discharged therethrough. The pipe 9 is provided with an opening registering with the opening 14 in the back of the pan 12 whereby air from the air pipe 9 moves in a jet across opening 11, thus picking up and spraying the paint discharged therethrough.

The tube 8 extends through the back face or wall as shown in Figs. 2 and 3, so that it may be connected to a supply pipe 15, said supply pipe extending to a suitable source of supplyeither arranged at a higher level than the distributing member or maintained at a pressure so that there will be a flow of paint. A controlling valve 16 is arranged between pipe 15 and pipe8, said valve having a controlling rod 17 merging into a controlling handle 18 positioned adjacent the handle 5 of the casing. A spring 19 normally holds the handle 18 in such position that valve 16 is closed. When the handle 5 is grasped the handle 18 may be also grasped and operated to any desired extent for causing a full flow or a partial flow of paint from the supply pipe 15 to the nozzle shown in Fig. 4.

In order that the paint sprayed on to a given surface by air from pipe 9 may be properly spread, brushes 6 and are provided which are rotated in opposite directions, namely, toward each other, as shown in Fig. 2. In using the device the same is moved over a surface and as the paint is sprayed thereon the brushes are rotated for producing a proper spreading action simulating the brushing done manually when a workman applies the paint. In order that the brushes 6 and 7 may properly rotate the gears 20 and 21, re- 3. Gear 20 directly 22 while gear 21 spectively, in the hood meshes with a pinion meshes with anidler 23 and said idler in turn meshes with pinion 22. Pinion 22 is connected with a shaft 24 of the air motor 25. Motor 25 may be of any desired type and is arranged to receive air from any suitable source through pipe 26. The exhaust air from motor 25 passes into the pipe 27 and from thence into pipe 9 where it causes the spraying action of the paint. In this Way the same air acts in the double ca pacity of rotating the moving parts and dis tributing the paint.

As shown in Fig. 6, means have been provided whereby the brushes 6 and 7 may be removed and other brushes substituted. The device may be used for cleaning purposes preparatory to painting by merely turning off the supply of paint. However, usually it is desired to have a coarser set of brushes for cleaning than those used in spreading the paint so that it is desirable to be able to quickly and easily remove the brushes and supply new ones whenever desired. The means shown in Fig. 6 comprises a journal member 28 for receiving the shaft 29, said shaft being formed with a projection 30 fitting into a notch in the shaft 31 which is connected to gear 20. The shaft 29 extends through the brush and bears against the end of a spring-pressed pin. 32, the spring 33 acting on pin 32 for holding the same in the position shown in Fig. 2, but the pin may be moved against the action of the spring by merely pulling on the head 34 whereupon the brush will move longitudinally in case the device is arranged on one edge, whereby the rojection 30 will move out of the notch in s aft 31 and the shaft 29 will be free of the journal 28. In this way the brush may be quickly and easily removed and a new one placed in position. It is evident that other means may be provided than that shown in Fig. 6 for quickly and easily removing the brushes without departing from the spirit of the invention.

An air motor 25 has been described specifically because the same is especially adapted to be used in connection with the spray, but it is evident that an electric motor could be used without departing from the spirit of the invention in case the spray was eliminated or in case air was supplied to the s ray from another source. Where a sup ply of compressed air is limited it is desirable to use an electric motor or some other driving means than air so that the limited supply of air may be used entirely for spraylng. In some instances it is desired to eliminate the spraying device and use a pan 35, as shown in Figs. 1 and 2, which is supplied with paint through the pipe 36, said pipe leading to any source of supply, preferably arranged at a higher level than the device. It will be observed that the pan 35 is comparatively shallow and conforms substantially to the shape of the brush 7. This is desirable in that only a small quantity is discharged into the pan at one time and, consequently, can be applied from the pan to the surface to be painted by the brush.

In this way the use of a spray is entirely eliminated and the device used for applying paint without any spraying device and without the use of air if desired. When the pan 35 and associated parts is used the air motor 25 may be used, or in fact, a driving member of any kind may be utilized, as the only requirement is to provide means for rotating the brushes 6 and 7.v It will thus be seen that the brushes may be utilized for applying paint as well as spreading paint and that brushes of the same characteristics may be used for cleaning.

What I claim is:

1. In a device of the character described,

a casing open on one face, a pair of rotatable brushes arranged in the casing and project ing beyond the casing through sa1d open face, means for spraying paint at a point between said brushes, a power member for rotating the brushes, and means for varying the amount of paint sprayed.

2. In a device of the character described, a pair of rotatable brushes, means for rotating said brushes, and means for directing a spray of paint between said brushes whereby when sa1d brushes are moved over a surface paint is applied to said surface and then spread by the brushes.

3. In a device of the character described,

a pair of rotatable brushes, an air motor for drlving said brushes, means for supplying a stream of paint at a point between said brushes, and means for directing the eX haust' air from said motor in a'spray past the discharge point of said paint for spraying the paint.

4:. In a device of the character described, a pair of rotatable brushes, means for driving said brushes, and a spraying member arranged between the brushes, said spraying member comprising a pipe for paint having an opening in one side, an air supply pipe having an opening discharging at right angles across the opening in the paint pipe, and a distributing pan for directing the sprayed air and paint.

5. In a device of the character described, a casing provided with a pair of rotatable brushes arranged therein, and projecting therefrom so as to engage the surface to be painted, means for causing the brushes to rotate in opposite directions, a spray nozzle arranged between said brushes and discharging in a plane substantially midway between the brushes, and a controlling member controlling the supply of paint to said spray nozzle.

6. In a device of the character described, a pair of rotatable brushes, a casing for said brushes, a train of gears connected to said brushes, a hood covering said train of gears, an air motor for driving said train of gears whereby the brushes are rotated, a spray nozzle for paint formed with a paint sup- 1 0 plying pipe and an air supplying pipe, and means for directing the exhaust from said motorto said air supplying pipe.

7. In a device of the character described, a casing of sheet metal, an encircling member substantially U-shaped in cross section connected with said casing between the top and bottom for reinforcing and stiffening the same, a stiffening member extendin 1 across the top and over part of the sides for a train of gears connected With said axles, 15

a power member for rotating said gears, and means for spraylng pamt, sald means being arranged between sald brushes.

FRANK LEE BENEDICT.

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