US2244159A - Nozzle - Google Patents

Description

June- 3, 1941. D P HUNTER NOZZLE Filed Oct. 28. 1939 Patented June 3, 1941 UNITED STAT NOZZLE Application October 28, i939, Serial Nc. 303,785

Claims.

My invention has to do with nozzles and, more particularly, it relates to nozzles within which a plurality oi liquid streams are intimately admixed before being sprayed therefrom.

While my nozzle is of course suitable for various uses, I have found it particularly eicient and suitable as the nozzleelement of a vehicle washing unit, for instance, wherein a cleaning chemical solution is intimately admixed with water and air.

I am of course aware that other nozzle devices have been designed for such uses, but my observation has been that they possess certain inherent shortcomings which serious irnpair their efciency. For instance, they are not so designed as will positively prevent contamination of the main Water supply by the cleaning chemicals, which usually takes place when a back pressure in the nozzle forces the chemical solution back into the Water supply. Another shortcoming is that prior devi-ces do not efficiently admix the various liquids making up the solution to be sprayed.

It is therefore among my objects to provide a device of this character which will positively prevent contamination of the main Water supply by chemicals used in forming the spray solution.

It is another object to `provide a device wherein proper admixture and atomizing of the liquids are obtained.

Another object is to provide efficient means in such a device for controlling the amounts of elements admitted to the solution forming portion of the nozzle.

Another object is to provide a device which may be economically manufactured, which is easy` to disassemble and reassemble for cleaning purposes and which is capable of long life.

Still further objects and corresponding accomplishments are inherent in my invention and those, as well as the objects specifically set forth hereinabove, will become obvious from the following detailed description of one preferred adaptation of the invention, for Which purpose I shall refer to the accompanying drawing, in which:

Fig. 1 is a side View, partly in section and partyly in elevation, showing certain parts in one position;

Fig. 2 is a fragmentary sectional view showing said parts in another position; and

Fig. 3 is a cross-section. on line 3-3 of Fig. 2.

Referring now to the drawing, I show a body 5 having a liquid inlet chamber 6 at its forward end into which liquid under pressure is (ci. zee- 4140 i admitted through a hose or the like 'I connected to the body by an adapter 8. In this adaptation of my invention, I show chamber 6 as the Water inlet chamber.

A second chamber it is also provided in the body forward of and separated from chamber 6 by a wall li, which wall is provided with a threaded opening i2 in which is` threadedly mounted the inlet end of a water delivery tube i5. Opening into chamber l0, at an angle of about 45 there isa passageway l5 controlled by a valve il oi conventional form, said valve being actuated by manually turning the hand wheel ila. Connected to passageway It by an adapter 8, I show a supply hose i9, whichrcarries at its interior and disposed longitudinally therein a smaller hose 2 l. A tube 23 is inserted in the end of hose 2i and the discharge end of tube 23 forms a seat for a ball valve 22 which is urged into closing position against its seat by means of `a coil spring 25 seating at` its other end against the end wall of a housing cup 25. Cup 2t is fitted onto the outlet end of tube 23 and has fluid passing openings 2l through `its end and side walls. In this example of my invention, I pass a cleaning chemical, such as a liquid soap, through hose 2l under suitable pressure to unseat ball valve 22 and be discharged into hose la; and in the annular space 28 between the exterior of hose 2l and the interior Wall .of hose |53, I pass air under suitable pressure, the air and cleaning solution entering chamber it together. The angle at which passage it. communicates with chamber l!) gives to the stream of air and chemical solution a swirling action. Chamber l` is curved in longitudinal section so that. the water entering it under pressure is given a swirling movement as'it enters theinlet end of tube l5. 1 l

The outlet end of body 5 is provided With a threaded opening til to receive the threaded inlet end of a tube 32. The previously described tube I5 is of smaller diameter than tube 32 and is mounted longitudinally therein to provide an annular passageway 33 between the exterior of tube I5 and the interiorof tube 32. The outlet end of tube 32 is threaded at 35 to threadedly receive the inner end of the nozzle holding sleeve 3l, which has an enlarged and interiorly threaded end 33 to receive the packing nut 39 and packing llt. The outlet end ofsleeve 31 is interiorly threaded at i2 to threadedly `receive the nozzle outlet tip 43, through Which there is a Venturi-shaped outlet opening `45 The inner end l of the nozzle tip member is .of reduced diameter and over it one end of a relatively iine mesh, cone-shaped, atomizing screen 50 is tted. A mixing chamber 48 is provided between the inner end of the nozzle tip member and the discharge end of tube I5.

The outlet end of tube l5 is beveled to provide a seat for a water outlet control plunger 5|. Plunger 5| is cone-shaped at 52 medially between its ends and has a reduced diameter portion 53 at its outer end to receive one end of a coil spring 55, which spring seats at its other end against the inner end of the outlet nozzle tip member. Spring 55 is disposed within the cone 50 and the inner end of the screen fits into a socket provided by the annular flange 51 of plunger 5|. The inner end of plunger 5| is formed :as a spider 6| (Fig. 3) which is slidably mounted in tube I5 and acts to hold the plunger 5| centered in the end of tube I5.

From the foregoing description, it will be seen that the cleaning solution, under pressure, enters through tube 2| from a supply source not shown,

imparts to it a swirling motion and thence it moves along passageway 33 to the outlet end of tube 32, where it is met by and admixed with the water stream entering chamber 48 from tube I5.

Plunger 5I has a portion 5 Ia presenting a straight annular face towards the outlet end of tube I5, against which the liquid discharged through tube V|5impinges to aid.- in moving plunger 5| off its seat against the pressure of spring 55 and against fluid pressure in chamber 48. Face 5|al also further acts to break up the liquid emerging from tube I5. The tapered face of plunger 5| directs the Water stream outwardly to intersect the air and cleaning solution entering chamber 48 from passage 33. I'he air-water-cleaning solution mixture is then forced through the screen 50, thus thoroughly atomizing it before it enters the Venturi-shaped outlet 45.

If the airand cleaning solution stream Yshould be under such pressure as might tend to barok up in tube I 5 and into the water supply, such action is prevented by the plunger 5|,` against which such back pressure would act and which is normally urged into seating position by the spring 55.

The tension on spring 55 may be varied by screwing or unscrewing sleeve 3l onto or off tube 32, a fluid' tight seat being maintained between tube 32 and sleeve 31 by the packing washer Ml. Such movement of the sleeve with respect to the tube also-serves to vary the size of chamber 48. Y If'it is desired, after the cleaning solution is applied to the surface being cleaned, to use the .water stream alone for rinsing purposes, it is only necessary to manually close valve I'I to shut off the air and cleaning solution from entering chamber Il). By virtue of the ball valve 22, the air stream is prevented from backing up into the cleaning solution line.

, While, in the foregoing, I have resorted to considerable detail oi` structure and association of parts in describing one particular example of my invention, I wish it to be understood that I have done so merely to make my invention understood Cil and that I do not limit my invention to such de On the contrary, my invention is only to:

1. A nozzle device comprising: a body having therein= a plurality of concentric passageways: communicating at their inlet ends with said re i spective fluid inlets, a check Valve in one of said' passageways including a cone-shaped plunger having its apex disposed towards the outlet end of said passageway and adapted to seat against said outlet end, a coil spring urging said valve into seating position, a mixture chamber in the body with which the outlet ends of said concen tric passageways communicate, a restricted outlet in the body communicating with the chamber and a cone-shaped screen mounted longitudinally in the chamber between the outlet ends of said passageways and the inlet end of said restricted outlet, said `screen housing said spring and* being disposed with its apex end towards the outlet ends of said passageways.

2. In a nozzle device for mixing and spraying a liquid solution, a body having therein a mixing chamber, a discharge outlet communicating with the chamber and a plurality of iiuid passing lines discharging into the chamber, a valve means associated with the discharge end of one of said lines and' adapted to be opened by fluid" pressure within said' line, said means including a tapered plunger in the discharge end of said line and seating against its discharge end, and pressure means in the chamber for urging said valve into seating position, said plunger presenting an annular impact surface towards the discharge end of said line against which the fluid passing irom said line impinges, said impact surface being perpendicular to the axis of the plunger.

3. A nozzle device comprising: a body having a plurality of, fluid inlets, concentric passageways in the body communicating at their inlet ends with said respective iiuidI inlets, a mixture cham.- ber in the body with which the outlet ends of the concentric passageways communicate, an outlet in the body communicating with the chamber, a cone valve mounted in the outlet end of the inner- ,most of the concentric passageways, a recess in the base endof said valve, a tubular screen having its inner end seated in said recess and extending longitudinally of the mixture chamber towards the outlet, said screen tapering from a Vrelatively reduced diameter at its inner end toa relatively larger diameter at its outer end whereby the fluid emerging from the outlet ends of the concentric passageways willstrike the exterior face of the tapered portion of the screen.

4. A nozzle device comprising a body having a pair of fluid inlets, an outer tube, an inner tube mounted longitudinally and concentrically in the outer tube and terminating in a common plane therewith whereby to provide a pair of concentric passageways communicating at their respective inlet ends with saidV respective fluid inlets, a sleeve threadedly mounted at its inner end on the discharge end of the outer tube and having a larger internal diameter than that of said' outer tube, a nozzle member in the outer end of the sleeve, said nozzle member being spaced from the discharge ends of said tubes whereby to provide a mixing chamber therebetween, and a cone valve in the discharge end of the inner tube, said valve having a base portion presenting aY baiiie surface perpendicular to the longitudinal axis of the inner tube.

5. A nozzle device comprising a body having a pair of fluid inlets, anouter tube, an inner tube mounted longitudinally andi concentrically in the outer tube and terminating in a common plane therewith whereby to provide a pair of concentric passageways communicating at their respective inlet ends with said respective uid inlets, a sleeve threadedly mounted at its inner end on the discharge end of the outer tube and having a larger internal diameter than that of said outer tube, a nozzle member in the outer end' of the 10

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