US1919244A - Rotary spraying device - Google Patents

Description

July 25, 1933.

E. G. MUNZ 1,919,244

ROTARY SPRAYING DEVICE v Filed May 26, 1930 INVENTOR v i/mer. #1012 BY W MmMJm Patented 1 July 25 1933 v NITED STATES; PATENT OFFICE], Q Q I Br anne, Mom, or nnrnorrinrefiiaaii v Q i aornaY-"srnavme nnvron Application mean at, 19301 Serial 1%. 455,568.

This invention relates, enerally to sprin wardly opening cupshaped portion 2 pro- I klersfor lawns and the li e and refers more particularly to those applicable to underground piping systems. i v a I Oneof the essential objects of the invention is to provide a simple and compact, rotary or revolving sprinklerhaving a radial discharge adapted to cover the greatest possible area with a ninimum amount of water Another-object is to provide an efficient sprinkler in which all of the operating parts are Within the sprinkler itself so that they are kept clean and lubricated by the Water and protected from dirt whenthey are in stalled in the ground as permanent fixtures. Another object is to provide a sprinkler of the type describedin which the rotating body or nozzle of the sprinkler is hydraulically balanced and is rotated by the friction of whirling liquid under pressure within the same. a a o Another object is to provide a sprinkler in which the rotating body or nozzleisj pro vided with brakes rotation thereof. a I With the above and other objects; in view the invention consists of certain novel fe'atur'esof construction, combinations and arrangements of parts that will be hereinafter more fully described andparticularly pointed outin the appended claims, a

In "the accompanying drawing:

Figure 1 is a vertical sectional View through asprinkler embodying my invention and showing' the parts inoperative 'sprinkit A shaped portion 20 is the base 20" of an inlingaposition;- i .7 Figure 2' is a view similarlto Figure 1 showingthe parts ininactive position.

Figure 3'is a cross section on the line 33 ofFigure2-.. 'Figure 4; is across-section on theline 4+4 of Figure2. a o H 'Re'ferring now to the drawing,- A is the casing; B is the rotatable body or nozzle; C is the stem for the body;,and D and E respectively are brakes for the rotatable body B of a sprinklerembodying my invention; As shown, the casing A has a tubularportion 1 threaded upon the upper end of a water supply pipe F in the ground and has anup that govern the'speed ot r I a f v 16 of the bodyand is provided with holes or I openings 17 thatincline upwardly l ti 1 vided at its upper endwith a lateral flanged 3i-thatj is substantially flush with the upper surfaceof the ground. The'body ornozzle- B is supported axially. on the stem C and is i a movable longitudinally of the ,cup-shape df portion 2 of'the casing. Preferably thebody 1 B issubstantially cylindrical in shapeand has abase 4; and'a cover 5. As shown, the. a

base l has an axial opening 6 and isprovided upon diametrically opposite sides of said opening'with laterally opening slots '1 and v 8 respectively. The cover 5 preferably has a flat top portion 9, a central depending'pon, tion 10, and a downwardly and outwardly inclined annular wall portion 11. The top 9 is adapted to seat in an annular recess 12 in the flange 3 of the casing-and cooperate with vthe latter to enclose the other parts when the bodyis in loweredpo sition; the depending portion '10 has an axial socket 1a and a radial passage -15;and the wall portion 11 constitutes the conneetion between the de' pending portion 10 andthe cylindrical alls to the axis of the rotating body. l Theste'm G is tubular in forni and extends through. the bases :18and {lrespectively ofthe cupshaped portion 2 of the casing and ,ofthe' body B. Preferably the stern is provided at its lower end with a nut 19 thatis engage I able with the lower face 120 of the base,an d 1 is provided at itsupper end with a cupshaped portion 20f. Pressed within this cupvertedgT-shaped member 21; As shown, an

' V annular shoulder 21 is provided at the bottom of vthecup-shaped portion 20' to space wa'rdly to'frictionally engage the innerwalls i of the cup-shapedportionf2 of'th'e casing';

In use the bodyB, stem" andnut 1 9 as V a unit are movable vertically within the cas-' loo g WVhen the water supply to the pipe F is turned oii',the body B, stem C and nut v 19 are in lowered position within the casing (see Figure 2), and the top 9 seats within the annular groove 12'. However, when the water supply to the pipe F is turned on the wvater will rise in the. tubular part'of the If desired the interior of the'body B maybe casing 1 against the lower face of the nut 19 and will cause the nut 19, stem and body B to rise until thelnut .19 engages the lower face 20 of the cup-shaped base (Figure 1), whereupon water rising in the passage 23 will flow through the inclined passages 22 and will be discharged in a whirling.

stream. into the body B. In this connection it willbe noted that the inclined passages 22 are larger .than the discharge openings 17,'hence the body B'will' be filled with water under pressure and this bodyv ofwhirling waterrotat'es the body B merely by friction.

providediwith blades or fins (not shown), but this is not necessary for satisfactory 0pei'ation; As the body rotates the whirling 7 water will'be discharged throughthe open ings 17 andwill be thrown laterally from the body over a large area. In fact, the con stru'ction and arrangement-of the body B and stem C is suchthat the entire velocity of the water is utilized for carrying the stream 7 from the body. Thus a minimum of water sprinklers cannot be used efiieiently or with will cover the greatest possible area. This is particularly desirable where'the water supply'is small and where ordinary underground out greatly diminishing the water supply for other domestic purposes. In the present instance the body B must be freeto'move with very little friction.= This Therefore, there is no upward pressure against the body on the area of the bearing. This overcomes the lack of downwardpressure on the body due to'the bearing 6 through the base 4 of the body through which the stem C extends. Consequently the body B is hydraulically balanced, but in order tomake it float its weight must be overcome, This is accomplished by making th e bearing 14 sun allor than the stem C so that upward pressure on the body B is equal tothe downward pressure plus the weight of the body, whereupon the body will float onthe stem G. i

It is desirable that the entire device be as small; in diameter aspossible and because of the small diameter the s'peed'would be great.-

the body will reach a wide radius.

However, it is also desirable to reduce the speed. as far as. possible in order that the water discharging "from the opening 17 in In this particular construction the speed of the body B is reduced by the segments D and Ewhich as the'body rotates are thrown outwardly by centrifugal force against the walls of the cupshapedportion 2 and serve as brakes. The faster the body rotates the greater is the pressure of the segmentsD and E against the cupshaped portion 2; hence the braking force is greater. In this connection it will be apparent that the desired braking effect may be obtained by, weights of different configuration or by other means.

The sprinkler illustrated inthe accompanying drawing and described above is. primarily adapted for use in connectlon .witlr under-' ground piping systems; however7 ibmayabe adapted to a garden installation by tl1e elim-- 'ination of the casing A and by an arrangement to aflix the stem C directlyto the vertical piping, or it may beprovided with spike or sled supports for portable use-with a hose as the source of water-supply;

IVhat I claim as my invention is:

' 1. In a sprinkler, a. casing attachable toa water supply means, stem movable longitudinally of the casing and havingan inverted substantially T-shaped head portion, anda rotatable body having a bearing inthe base thereof receiving the stem and having a.

bearing inthe top thereof receiving the stem oi. the T head portion, said top also having a radial passage constituting a vent for the last mentioned-bearing, whereby any leakage past the said last mentioned bearing is immedately discharged to the atmosphere so that no pressure builds up above the stem of the Tiliead,

and said last mentioned bearing being smaller than the bearing in. the base forthe stem so:

that upward. pressure on the body is equal to the downward pressure plus the weight of the y. I I. a

2. In a sprinkler, a casing, a rotatable noz zle projectable from within said casing, means for rotatingsaid nozzle and a' 'cens trifugal brake operativelyengaging-said casing and said nozzle when the latter isrotating in: projected position for limiting the speed of rotation.

In a sprinkler, ble in said casing, means for dischargingww ter into said rotatable nozzle in'a direction a casing, a .nozzlelrotata to exert a torque about the axis of said-nob zle, means for discharging the water from saidnozzle radially thereofand meansfor relieving the hydraulic pressure on a'portion' of the upper surface of said'nozzlev whereby the upward pressure on said nozzle is just.

sufficiently greater than the downward; pres.

sure thereonto maintain a hydraulic balance permitting the free rotation" of *said nozzle and a centrifugal brake for limiting speed of rotation of said nozzle.

4. In a sprinkler, a casing,a nozzle rotatably and axially movable with respect to said casing, means operable by the; water pressure for axially moving said nozzle,-means'for discharging Water into said rotatably and axially movable nozzle in a direction to exert a torque about the axis of said nozzle, means for radially discharging the water from said nozzle and means for relieving the the hydraulic pressure on a portion of the upper surface of said nozzle whereby the upward pressure on said nozzle is just sufliciently greater than the downward pressure thereon to maintain a hydraulic balance permitting the free rotation of said nozzle and a centrifugal brake for-limiting the speed of rotation of said nozzle.

5. In a sprinkler, a llquid supplyconduit, a nozzle head rotatable and axially movable relative to said supply conduit, means. for

vrotating said head, means for maintainingsaid nozzle head in substantial hydraulic balance at the normal operating pressure of said liquid supply'conduit, thereby obtaining low initial resistance to rotation and means for retarding rotation of said nozzle head extendingwithin said nozzle head and adapted to discharge liquid thereinto in a manner I to cause rotation of the head by theinternal action of theliquid. N

8. In a'sprinkler, a rotatably and axially movable nozzle head, a liquid supply con-f duit extending within said nozzleflhead and means associated with said liquid supply conduit and within said head for discharging liquid in a direction to cause said head to be rotated by internal action of the liquid.

9. In a sprinkler,afixed body, ahead supported on said body for rotation and axial movement with respectthereto, and means within said head for discharging liquid in a direction to exert a torque within said head whereby a rotary motion is obtained within i said head capable of rotating said head, and] r means for discharging the llquid from said 1 V head'ina direction to project a maximum distance therefrom. v

-10. In a sprinkler, a rotatably and axially movablenozzle head, a liquid supply conduit extending within said nozzlehead and adapt ed to discharge liquid thereinto in a direc-' tion to cause a rotation within said nozzle head byintern al action, and means cooperat ing with said nozzle head to-producea rota tion of'said head at a substantially slower speed than said internal rotation.

. I 11. In a sprinkler, a rotatable nozzle head, a liquid supply conduit extending withinsaid nozzle head, means for maintaining said head in substantial hydraulic balance at the normal operatingpressure of said liquid supply conduit, and meansassociated with said supply conduit and within said nozzle head'for discharging the liquid from said supplycona duit into said nozzle head in-a direction to V 1 cause said head to be rotated by internalaction of the liquid.

ELMER G. MUNZ. f

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