US1471690A - Paint-spraying apparatus - Google Patents

Description

@QL 23, w23

G. c. FISH ET AL PAINT SPRAYING APPARATUF Filed April 17. 192,2 2 Sheets-Sheet l W/ENTUQE HMA/Kfig@ am L E MEM y www G. c. Flai-1 ET AL PAINT SPRAYING APPARATUS Filed April 1'7. 1922 "2 Sheets-Sheet 2 Patented Get.. 23, i923.'

,GRANT C. FISE AND ALFRED H. CUMMINGS, OF CEICG, ,CLFRN..

PAINTv-SPRAYING APPARATUS.

Application fi1ed-April 17, 1922. Serial No. 553,518.

ToaiZZ whom t may concern.'

Be it known that we, GRANT C. FisH and ALFRED H. CUMMiivos. citizens ot the United States, residing at Chico, in the county of Butte and State of (galit'ornia, have invented certain new and useful Improvements in. Paint-Spraying Apparatus, of'which the following is a specification.

The present invention relatcsto apparatus for spraying liquids, and is particularly adapted for the spraying of paint.

The object of the invention is tov provide a pneumatic or compressed air spray painting apparatus which embodies the principle of combining the paint/and air into one unit or mixture in au atomized'torm and transmitting it in a single hose or tube to the gun', nozzle, or point. of application.` rfhis method has many advantages which are hereinafter described.

As is Well known, the prevailing spray paint methodsnow on the market are of the double hosev type which requires two lines of hose to cachgun or spray line, or a separate line each to convey the paint and air to the gun or point of application before the paint and air are united. These types have many disadvantages, as for instance,- the paint being borne in a solid mass, a greater variation of pressure is required to lift it as the operator ascends or descends, and frequent adjustments of machine and nozzle are necessary. logging and spittingare attendant factors and the length of hose and4 latitude of operation are necessarily limited'. Such types are essentially adapted for shop or factory` use where the variation of altitude isnegligible or Where the machine remains near the point of application. Furthermore, the use of extension rods, which are essential factorsv in the spraying of large structures, areas, roofs and inaccessible places, is rendered impracticalwith these types for the reason that a dual extension` system is complex, cumbersome, and inconvenient of'operation.

These disadvantages are overcome by our improved apparatus, which transmits.v the paint mixture in a light, atomized form through a single line of hose/that affords advantages for ractical attachments and easy handling. his princi le also admits yof the -hose being of any suitable length to meet the convenience o operation without v having to-move the 'apparatus constantly sboiitixi lorder to be' near the point of application, and permits. the simultaneous use of tivo or more nozzles at widely dierent elevations.

A further object of our invention is to a while the Same is being (psed. ,I

Although our inventi ii is liereini'illurtrated and described in its preierred form. as an apparatus for spraying paint, it is obvious that it may be used With-equal success or the spraying or atomizing of dther liquids. the form and construction of the apparatusl as herein described and illustrated without departing from' the essential features of the invention as .expressed in the claims hereto appended. v

In order lmore fully ti. mprehend the invention, reference should ne made to the accompanying drawings, wherein:-

Fig. l is a side elevation of our paint spraying apparatus, showing the atomizing and control head and the upper portion of the paint container.

Fig. 2 is a part-sectional elevation, enlarged, of the atomizing and control head shown in Fig. L

Figs. 3 and 4 are 1sectional plan views, respectively taken on the lines lll- H and 'IV-IV of i.

Fig. 5 is a vertical section of the head, taken in the direction of the arrows on the lines V-V of Figs. l 'and 3.

Fig. 6 is a. sectionai plan taken von the line VI-VI of Fig. 5.

Fig. 7 is a part Asectional eleva-tion of the lower portion of the head and the paint-receiving and agitator pipes extending down- I tion 11 to which is seciired a readily remov-l able cap 12. Said cap is preferably provided with handles 13,' Figs. 1 and 9, and also with slotted ears 14, by' .which it is iiriniy clampedupon the neck; il, to raalte an air tight joint, as' by meansot screws l5, as,

,shown in Figs. l and 8.

The cap 12 vis providedA with eeentrai Moreover, changes may be made in o threaded opening 16, and S, into .1

which is swuredthe lower end portion 17 of an atomizing and control head 18, Figs. 1, 2, and 7. A flange 19 formed upon said head portion 17 seats against the upper surface of the cap 12 to form a tight joint.

Air, under suitable pressure, is introduced into the head 18 through a iiexible conduit or hose 20, Fig. 1, and a three-way valve 2l, Figs. 1, 2 and 3. From said three-way valve 21 the air passes through a duct 22, Fig. 3, and may be admitted by means of a manually operated valve 23 to a chamber 24, which extends downwardly in irregular form, as shown in Figs. 2 to 6, through the head 18 and communicates with the interior of the container 10. The valve 23 therefore controls the admission of air to the container 10, above the level of the paint therein. A. pressure gauge 25, Figs, 1 and 5, is preferably mounted upon the top of the head 18, and is connected with the interior 'of the container by a passage 26, Figs. 2. 4, 5 and 6, so that the pressure within said container may be ascertained at all times. A relief valve 27, Figs. 1 and 4,' is provided to permit the escape of air from the chamber 24.- and the container 10 when necessary.

The lower portion 17 of the head 18 has two separate ducts 28,' Figs. 5, 6, and 7,

from which paint-receiving tubes 29, Fig. 7, extend downwardly tothe bottom of the container 10. Said receiving tubes are provided with tips or feet 30, which are preferably notched on their lower edges, as shown at 31,' in order to permit the ready entrance of the paint even though they may touch the bottom of the container. The two ducts 28 are separately controlled by valves 32, Figs. 4 and 5, and from said valves lead `upwardly and communicate with separate horizontal ducts 33, Figs. 2 and 3,`whicl1 which hoses -35'1nay be attached, as shown in Fig.A 1 said `hoses leading to spray nozzles or other discharge apparatus not shown in the drawings. The liquid paint is thus forced, by the pressure Yabove it within the container 10, up through the tubes 29 and ducts l28 and 33 tothe hoses 35, and is con- Jrolled by the valves 32.v We have illustrated and described two separate paint outletsmerely by way of example, it being obvious `that more or less may be constructed withoutl altering the' principles involved.

The'horizontal paint ,y ducts 33 lie in the same horizontal plane as the main air duct 22, and communicate .therewith through valves 36, Figs. 3 and 5, so that, b opening said valves 36, air is admitted irectly to said paint ducts 33, and, meeting ,the paint streams issuing from the vertical ducts-28, atomizes the paint and carries lit along through the hoses '35 in the form of a finely divided spray. In thisform, the paintspray Ymay be carried through hoses for the ground, or near the atomizing apparaterminate in exterior connections 34 to tus, and another may work simultaneously at the -top of the building, both being supplied from the same apparatus. By properlyadjusting the-paint valves 32 and the air valves 36, any desired condition of spray may be obtained. Said valves 32 and 36 are operated by suitable exterior hand-wheels or knobs 32 and 36 respectively, as shown in the drawings.

The three-way valve 21 may be turned to divert the incoming air into a passage 37, Figs. 2, 4, 5 and 6, which extends downwardly through the head 18 and terminates in a tube 38, Fig. 7 extending down into the paint within the container v10. When air is admitted in this manner, it bubbles up through the paint, thereby effectively agi.- tating the same, and obviating the necessity of a mechanical agitator of any kind. The operation of the apparatus is not otherwise affected by thus diver-ting the air supply, the air passing from the container 10 into the chamber 24, and supplying the atomizing valves 36 as before.

the paint ducts 28 become clogged, they can be easily blown out by closing the main air valve 23 and opening the relief valve 27. Then, assuming the spray nozzles- (not shown) to be closed, the air passes through the duct 22, the valves 32, down through the paint ducts 28 and receiving tubes 29, bub'- bles up through the paint and escapes through the relief valve 27. This also agi-- tates the paint thoroughly, and stirs up any solid matter that may have settled on the bottom of the container 10.

21 is first opened, thereby vadmitting air under pressure to the container 10. The air valves 36 and paint valves 32 are then opened,

. sitions as before.

When it is necessary to re-fill the container 10 with paint, the Vagitator vis shut of; the air valves 23 and 36 and paint valves 32 are closed, and the relief valve y27 opened.

In using the apparatus, the main air valve sin Then, by loosening the screws 15, the cap 12,

with the head 18 attached thereto, can be easily removed by rotating it slightly to free the ears 14 from said screws 15. The hoses 20 and 35 need not be removed from .the head 18, as there is no` necessity for unscrew'ing said head from the cap 12.

Having thus described our invention, what we claim as new and desire to protect by Letters Patent of the United States is as follows y 1. A spraying apparatus includin a fluid containing receptacle, a mixing hea carried thereby and consisting of a body provided with a fluid discharge duct opening at one end to the atmosphere and its opposite 'end communicating with the interior o f the receptacle, a fluid receiving tube at the inlet end of said duc-t and extending into the fluid within the receptacle, a valve within said fluid inlet duct, and a valve controlled air duct communicating with said fluid discharge duct and the interior of said recept'acle whereby, on. the adjustment of its valve, pressure is admitted into the receptacle to raise the fluid within the receiving' tube and to supply an atomizing air stream into said fluid discharge duct.

2. A spraying apparatus including a fluld containing receptacle, a mixing head carried thereby and consisting of a body provided with a fluid discharge duct opening at one end to the atmosphere and its opposite end communicating with the interior of the receptacle, a fluid receiving tube at the inlet end of said ductand extcndin into the fluid within the receptacle, a va ve Within said fluid inlet duct, an air duct communicating with the fluid discharge duct and provided with a branch communicating with the interior of thereceptacle, an agitaf.

tor tube associated with said branch and depending into the fluid wit-hin the receptacle,A a multi-way valve within said air duct, and a valve controlled passage connecting. the interior of said receptacle with said air' duct.

3. A spraying apparatus including a fluid containing receptacle, a mixing head carried thereby and consisting of a body provided with a fluid discharge duct opening at one end to the atmosphere and its opposite end communicating with the interior of the receptacle, a fluid receiving tube at the inlet end ofi said duct andextending into the fluid within the receptacle, a valve within said fluid inlet duct, an air duct communicating with the fluid discharge duct and provided with a branch communicating with the inte rior of the receptacle, an agitator tube associated with said branch and' depending into'the fluid within thereceptacle, a multiway valve within said air "duct, and a valve controlled passage connecting the interior of said receptacle with 'said air duct in advance of its connection with said fluid discharge duct.

4. A spraying apparatus including a fluid containing receptacle, a mixing head carried thereby and consisting `of a body provided with an air duct, a fluid discharge duct communicating at one end with said air duct and its other end opening to the atmosphere, a valve for controlling the passage of air from said air duct into said fluid discharge duct, a fluid inlet duct intersecting said fluid discharge duct with its-inlet end communieating with the interior of the receptacle, a fluid receiving tube at the inlet end of said duct and. extending into the fluid within the receptacle, a valve within said fluid inlet duct, a branch air duct lleadi'n from the main air duct and discharging into the interior of the receptacle, and a multi-way valve for controlling the direction of travel of the air through said air ducts.

5. A spraying apparatus including a fluid containing receptacle, a cover for closin the same, a mixing head carried thereby an' including a body'provided with an air duct opening into the interior 0f the container, a multi-way valve therein, said head provided with a fluid duct therein opening at one end into the receptacle and at its other to the atmosphere, 'a fluid receiving tube associated with one end of the fluid duct and depending into the fluid contained within the receptacle, an a valve controlled connection between said air duct and said fluid duct.

6. A spraying apparatus including a fluid containing receptacle, a cover for closing the same, a mining head carried thereby andincluding 'a body provided with an air duct openinginto the interior of the container, a multi-way valve therein, said head pro vided with a fluid duct therein opening at one end tinto the receptacle and at its other to the atmosphere, a fluid receiving tube associated with one end of the fluid duct'and depending ino the fluid contained within the receptacle@ a valve controlled connection between saidffair duct and said fluid'duct and a valvelor controlling the supply of air from said air duct t0 the receptacle.

In testimony whereof we have signed our names to this specification.

GRANT c. FISH. ALFRED H. cUMMrNGs.

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