US1377654A - Spraying-machine - Google Patents

Description

H. C. BAUMGARDNER.

SPRAYING MACHINE.

APPLICATION FILED SEPT. 13! I920.

Patented May 10, 1921.

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SPRAYING MACHINE.

APPLICATION FILED SEPT. 13 1920.

Patented May 10, 1921.

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HCfiaz/Lmyardner UNITED STATES HENRY C. BAUMGARDNER, OF ANN ARBOR, MICHIGAN.

SPRAYING-MACHINE.

Specification of Letters Patent.

' Patented May 10, 1921.

Application filed September 13, 1920. Serial No. 409,766.

To all whom it may concern:

Be it known that I, HENRY C. BAUM- GARDNER, a citizen of the United States, re siding at Ann Arbor, 1n the county of VVashtenaw and State of Michigan, have invented certain new and usefullmprovements in Spraying-Machines, of which the following is a specification.

This invention relates to a compressed air spraying machine mainly designed for farm and orchard work, the general ob ect oi the invention being to provide a continuous spray with a comparatively small amount of compressed air.

Another object of the invention 1s to provide a number of tanks similar to that which forms the subject matter of an application filed by me on May it, 1920, Serial l\ '0. 381,242, with means for alternately supplying the tanks with compressed-air and with the spraying solution.

A further object of the invention is to provide a system of valves for automatically connecting one tank with the reservoir containing the spraying solution and the other tank, which is receiving the compressed air, with the spray nozzle so that one tank s being filled while the other is being emptied.

A further object of the invention is to provide automatic means, preferably operated by the power means for furnishing the compressed air, for alternately supplying the tanks with compressed air.

A still further object of the invention is to provide a container for supporting the collapsible holder for the liquid in each spray tank and to form perforations in said container for permitting the compressed air to act on the collapsible holder.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illus trated in the accompanying drawlngs and specifically pointed out in the appended claims.

In describing my invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the sc eral views, and in which Figure 1 is a diagrammatic view of the complete device.

Fig. 2 is a longitudinal sectional view through the spray tanks and the valve controlled pipes connecting the tanks with the reservoir.

The remaining figures are detail views of the various parts of the apparatus.

In these views A and B indicate a pair of compressed air tanks which are constructed somewhat similar to the tank shown in the before mentioned application. Each tank comprises an outer cylinder 1 which has its upper end closed by a cap 2 which is detachably held to the cylinder by the pivoted bolts and their nuts 3. The collapsible container l is supported in the cylinder by a perforated cylinder 5 which is detachably con nected to cap 2. This perforated cylinder not only acts as a support for the collapsible member but its perforations act to equalize the pressure of the air upon the cylinder.

he reservoir C, for containing the spraying solution, is connected with the collapsible members A of tanks A and B by the pipe 6 which has the branches 7 and 8 which pass through the caps 2 and are suitably con nected with the collapsible members 4. These two branches. are vconnected together by the cross pipe 9 which is provided with a stem 10 for receiving the tube 11 which carries the nozzle 12. A downwardly opening valve 13 is placed in each of the pipes 7 and 8 and a pair of valves 14 are placed in pipe 9, one on each side of stem 10, and these valves open toward each other.

It will thus be seen that the pressure of the liquid in the reservoir will tend to open the valves 13 while the pressure within the tanks A and B will tend to close said valves. This pressurealso tends to open the valves 14. Therefore when pressure is in one tank and the other tank is tree of pressure the spraying solution will pass through the valve 13 into the collapsible member of the tank which is free of pressure while the com pressed air in the other tank willdrive the solution in the collapsible member of this tankthrough valve 14:, into stem 10 and through tube 11 to the nozzle. The pressure in pipe 9 and stem 10 will cause the other valve is to close and this pressure will also hold the second valve 18 closed against the pressure of the solution in the reservoir. As soon as the pressure is supplied to the other tank and the pressure in the opposite tank is shut off the actionwill be reversed so that the full tank will be connected with the spray nozzle and the empty tank with the Cir reservoir. This action will be kept up indefinitely until the solution in the reservoir is used up or unless the supply of compressed air is out off.

At the point of entrance of the compressed air to each tank A and B I leave a portion of each perforated cylinder 5 unperforated so that the air striking this solid part will be deflected and will be prevented from striking the collapsible member with its full force. This solid part is shown at 5.

I provide an air reservoir 15 which may be provided with a gage 16 and a relief valve 17 and I connect this reservoir to any suitable form of air compressor, which is indicated at 18. This compressor may be actuated by any suitable form of motor, as shown at 19. A line of piping 20 runs from the air reservoir to each of the tanks A and B, the outlet ends of said pipes being placed opposite the solid parts 5 on the perforated cylinders, as before described. A valve 21 is located in each pipeline, each valve being provided with an exhaust 22, and the plug of each valve is so formed that it can be moved into position to connect the airreservoir with the pressure tank or the pressure tank with the exhaust.

The valves may be operated by the cams 23 located on the shaft 24 which may be driven in any suitable manner from the engine 19. These cams actuate the valves through means of the levers 25 and the links 26.

I may place a valve 27 adjacent the connection of the pipelines with the air reservoir so as to cut off these lines from the reservoir when desired or necessary and I may also place a valve 28 in the pipe 6 for shutting off the spray solution reservoir from the tanks.

I prefer to form the cams 23 in such a manner that one cam will hold the valve controlling one of the pipelines open for a longer period of time than the other valve is kept open by its cam so as to insure a continuous spray at the nozzle. For instance, I may form the cam which controls the valve for tank A so that it will hold the valve open for thirty seconds and close it for thirty seconds while the other cam will hold the valve of tank B open'for forty seconds and closed for twenty seconds. We.

therefore have a pressure in one tank of thirty seconds and a pressure in the other tank of forty seconds as well as pressure in both tanks for ten seconds due to the overlap caused by the one cam having ten seconds more high portion than the lower portion. There is therefore always a strong and continuous pressure on one or the other of the two pressure spray tanks.

Valve 27 can also be used to regulate the air pressure to the pressure tanks.

It will be seen that by my invention a continuous spray is secured with a comparatively small amount of air pressure. The pressure being alternately supplied to tanks A and B while the valves automatically control the flow of solution from the reservoir into said tanks.

I may place a gage 10 on the stem 10 for indicating the pressure of the solution passing to the nozzle.

It is thought from the foregoing description that the advantages and novel features of my invention will be readily apparent.

I desire it to be understood that I may make changes in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the appended claims.

What I claim is 1. A spraying apparatus comprising a pair of pressure tanks, a reservoir, a branch pipe connecting the said tanks with the reservoir, a nozzle carrying pipe connected with the branches of said pipe, means for alternately supplying compressed air to the tanks and valves in the branches of the supply pipe and in said nozzle carrying pipe for automatically controlling the flow of solution from the reservoir to the tanks and the solution from the tanks to the nozzle.

2. A spraying apparatus of the class described comprising a pair of spray tanks, a reservoir, a branch pipe connecting the reservoir with the tanks, a cross pipe connecting the branches together, a stem on the cross pipe, a nozzle carrying tube con nected with the stem, downwardly opening valves in the branches above the cross pipe, outwardly opening valves in the cross pipe, one on each side of the stem and means for alternately supplying compressed air to the spray tanks.

3. A spraying apparatus of the class described comprising a pair of spray tanks, a reservoir, a branch pipe connecting the same with the tanks, a nozzle carrying pipe con necting the branches of the pipes together, valves in said pipes, a source of compressed air pipes for connecting the same with the spray tanks, valves in said pipes and means for actuatingsaid valves so as to alternately connect one tank with the compressed air tank and the other tank with the exhaust and vice versa.

4. A spraying apparatus of the class described comprising a pair of spray tanks, a reservoir, a branch pipe connecting the reservoir with the spray tanks, a nozzle carrying pipe connected with the branches, valves for controlling the connections between the tank-s and reservoir and between the tanks and the nozzle carrying pipe, a compressed air tank, pipes connecting the same with the spray tanks, controlling valves in said pipes, means for actuating said valves so as to alternately connect the tanks with the air pressure tank and means for adjusting the amount of air passing from the compressed air tank. I

5. A spraying apparatus of the class de- 5 scribed comprising a spray tank including an outer cylinder, an inner perforated cylinder having a solid part, the outer cylinder having an air inlet located opposite the solid part and a collapsible member Within the perforated cylinder for containingthe spraying solution.

In testimony whereof I afix my signature.

HENRY C. BAUMGARDNER.

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