US1684661A - Spraying device - Google Patents

Description

Sept. 18, 1928. v 1,684,661

c. BROWN SPIRAYIING DEVICE Filed Oct. '7. 1926 M in , 3 ATTO" Y3 Patented Sept. 18, 1928.

eterna rarest A series.

COLIN BROWN, OF ROCHESTER, NEW YORK.

SPRAYING DEVICE.

Application: filed 0ctober 7, 1925. Serial No. 140,000

My present invention relates to spraying devices and moreparticularly to atomizers of the type usually used as hand sprayers for projecting liquids upon plants, or in corresponding environments for the purpose of reaching and killing bugs and insects. The invention is not necessarily. limitecLto this use the statement being merely that it is highly adaptableto devices of' this kind. It has for its object to provide a construction whereby atomizers and Sprayers of this general nature maybe manufactnredat low cost, and yet be durable and eiiicient, in their. op oration.

To these and other ends the invention resides in certain improvements and combination of parts, all as will'be hereinafter. more fully described, the novel features being pointed out in the claims at the end of the specification.

In the drawings: a

Figure 1 is a side elevation of an atomizer and hand sprayer constructed in accordance with and illustrating one embodiment of my invention;

Figure 2 is a fragmentary side elevation ofa portion of the pump cylinder with con necting parts;

Figure 3 is a top plan View of the device shown in Figure 1;

Figure 4L- is an enlarged sectional view of the forward end of the pump cylinder and its mountingon the reservoir; and v Figure 5 is a fragmentary section on the line 55 of Figure 4. i

Similar reference numerals throughout the severalviews indicate the same parts. This invention contemplates the production of what is known as aficontinuous atomizer, namely, one in which a continuous spray re sults from the intermittent pulsations of a hand or other pump through the operations ofwhich latter a pressure is created and maintained upon a fluid body that is ultimately projected from the device without interruption, that is, continuously, not refiecting the pressure giving impulses of the pump. Such devices are largely used at the present day in the extermination of flies, a suitable killing liquid being pumped directly upon these insects or into the atmosphere which they are frequenting. The liquid used is usually supplied in a can or reservoir 1 (referring more particularly to the drawings) having a pressed threaded neck 2 for a screw top or stopper (not shown). The

down upon the neck 2 in place ofthe top or, cap after the latter has been removed, for whlch purpose my said dev ce comprisesa threaded cap 8 that is screwed down. upon the neck 2 in the manner shown inFigures 1v andt. a

Extending throughthe top ofthis cap and soldered or otherwise securedtherein, as indicated at 4: is a siphon tube 5 that extends to approximately the bot-tom of the can or reservoir 1 asshown in dotted lines in Figure 1. In the present embodiment thistube is sealed at its upper endand,assuming that, it is made from pieces cut from a continuous length of tubing, the sealing may be done by soldering the upper end-at 6. The" dischargeportion of this upper end which pro jects above and eXter-iorly of the capmemher 8 resides. in an aperture 7 bored in the front of the tube-near its'top; Below. the

top wall 8 of the cap, through which the atomizer tube projects is an opening 9, in that tube that communicateswith the; chamher or body of air 10 lying uponthe body of liquid 11 in the can or reservoir 1 In the operation of the device the body of air 10 is under greater than atmospheric pressure which pressure, acting on the body of liquid 11 to raise itfin the tube,5, is generated by the hand pump now to bedescribed, v

This hand pump comprises. a cylinder 12 consisting ofanordinary pump tube, the for,- ward end of which is closed by a. cap 13 or. in any suitable manner. This forward end is soldered at lt or otherwise suitably secured to the top of the capmember 3 so as to overliethe'same for some distance at least. as

shown in Figure 4. Through this overlying portion, communication is had between'the said forward end of the pump cylinder or tube 12 and the air pressure body 10 within the can or reservoir 1 overlying the liquid body 11 by means of a valve cage 15, the upper end of which has a small opening 16 and the lower end of which has an opening 17. i

A cotter pin or similar device spansthe lower opening 17 and supports a ball 18 that constitutes a check valve for the opening 16 in the well known manner of pump operation whereby air pumped under pressure to the chamber 10 maintains its pressure on the liquid 11. a

The pressure referred to is produced by a pump embodying the cylinder 12 before referred to and a suitable pump piston 19 on a rod 20 connected to an exterior handle 21. It is easy to see that the operations or reciprocations of the piston 19 in the cylinder 12 nozzle oropening 7 which spray is continuous due to the fact that the pressure at 10 is continuous as built up by the pump through the check valve. v

Applicant is aware that, as a matter of theory, it can be pointed out that the back pressure downwardly in the tube 5 because of the entrance of the compressed body of air at 9 should equalize the driving pressure of the air body 10 upon the liquid body 11. However in practice this is found not to be the case. The liquid-column continues to rise and the compressed air entering the atomizing tube 5 at 9 continues upwardly instead of downwardly exerting its force and discharges at the nozzle aperture 7 in themanner previously stated.

i The sprayer described and shown is a very cheap one to make not only because of the fact that parts 5,12 and 13, in assembling are all secured by soldering or otherwise upon the single cap element 3 but because their relationships, in assembling, do not have to be fixed with any great degree of accuracy. The tube 5 may be high or low within certain limits as long as one opening 9 is below and the other opening 7 is above the cap top 8 without any particular reference to the position of the cylinder head 13 or the cylinder 12. This is in contrast to the usual construction of atomizers in which an air opening in the pump must be carefully placed with reference to themouth or discharge opening of the atomizing tube.

acility, the liquid to be used can be supplied in cans such as that shown at 1 with an ordinary screw ca closure corresponding to the cap portion s own at 3 and then the latter substituted therefor, which in the one operation attaches thewhole pump mechanism to the can or container.

I claim as my invention:

1. In a sprayer, the'combination with a reservoir adapted to contain a body of liquid, and having a threaded neck thereon adapted to receive a screw cap, of a cap threaded on said neck,an atomizer tube extending through said cap and securedtherein, the lower end of the tube on the interior having an opening below the fluid level of thereservoir and another opening above the fluid level thereof and the upper end of the tube having an exterior atomizing spraying opening, and a hand pump cylinder secured to the exterior of the cap and a check valve comprising -'a casing secured through registering apertures provided in said cap and the side wall of the pump cylinder and providing one-way communication from said pump'to the interior of the reservoir to accumulate compressive pulsations of the pump and supply pressure to the top ofthe reservoir to create air pressure therein above the liquid body, and to also escape, successively, through the said interior and exterior openings'of the tube. 2. In a sprayer, the combination witha reservoir adapted to contain abody of liquid, and havinga threaded neck thereon adapted to receive a screw cap, of a cap threaded on saidneck, an atomizer tube extending through said cap andsecured therein, a hand pump cylinder secured to the exterior of the cap, and a check valve comprising a casing secured through registering apertures provided in said cap and the side wall of the pump cylinder and providing one-way communica-' tion from said pum to the interior of the reservoir to accumuate'compressive pulsa-z tions of the pump and supply pressure to the top of the reservoir to create air pressure therein above the liquid body.

' COLIN BROWN.

Images