IL102152A - Adjustable arc spray and rotary stream sprinkler - Google Patents

Description

ADJUSTABLE ARC SPRAY AND ROTARY STREAM SPRINKLER H'212'D ΠΠ 1Π ·>Ι\ΐ>ρ PID'T 7)12 T 1 J 113*7 njJTJil ΠΙϋΠη CARL LEOPOLD CLARENCE KAH, JR.

C: 14745 - 1 102152/2 Descr i pt i on Adjustable Arc Spray and Rotary Stream Sprinkler Technical Field This invention relates to adjustable arc of coverage nozzles to provide uniform water precipitation over each area of coverage selected and to provide special patterns of precipitation.

Background Art Patent No. 4,867,378, issued September 19, 1989, discloses a sprinkler having an adjustable arc of oscillation rotating nozzle with the arc of oscillation being setable and indicated on the top of the nozzle .

The market advantage for a sprinkler that can be easily set to cover a particular area from the top was discussed. The sprinkler of the referenced patent application was for large area coverage, long throw radius, oscillating nozzle sprinklers.

In U.S. Patent No. 5,098.021, sprinklers of the oscillating nozzle "<" :■· ' " ' type having automatically adjustable nozzles to provide proper water precipitation over each area of coverage selected was disclosed.

In Patent No. 4,579,285, an adjustable arc of coverage spray nozzle sprinkler is disclosed where the arcuate orifice is at the nozzle outlet end with pressure trying to force the arcuate slot open such that it must be fixed or mechanically held in position. The outlet orifice of prior art sprinklers is very vulnerable to being clogged by dirt since for the flow rate commonly used for commercial and residential sprinklers, the arcuate slots are ve y narrow. If disassembled for cleaning, proper reassembly for the correct slot height and precipitation rate is question-able. Small differences in slot height make significant precipitation rate differences. If upstream filters are provided, they have to have small openings but clog quickly, requiring disassembly of the sprinkler, from its housing .

Rotary stream sprinklers are shown in U. S.

Patent No..4,815,662; U. S. Patent No. 4,842,201; and U. S. Patent No. 4,867,379.

Disclosure of Invention This application discloses a concept for pro-viding an adjustable and indicated arc of coverage for smaller and intermediate areas of coverage sprinklers which can be fixed spray or have a rotating distributing head providing a plurality of streams for intermediate ranges with an adjustable arc of coverage and automatically provide for the same precipitation rate, i.e., one inch per square foot per hour, for the area covered by the selected arc .

The arc of coverage can easily be set and indicated on the top of the nozzle. Ease of setting a sprinkler for the required arc of coverage and having it provide a matched precipitation for its area of coverage to those sprinklers installed and set in other areas of the yard would greatly reduce the required inventory and time required for installation as well as provide more uniform coverage than now being achieved in present day. instal lations .

Another feature of this invention not previously provided for in an adjustable arc of coverage sprinkler nozzle is the ease of cleaning. Being able to easily clean dirt from the arcuate slot used to control flow for the desired arc of sprinkler coverage is an important feature and greatly enhances the usability in systems with well pumped water and. effluent water supplied systems.

In the configuration disclosed here, the adjustable arcuate opening is upstream with pressure trying to close it, thus making it a much simpler design to manufacture and also to clean by just pushing down on the center arcuate valving member against the pressure or small spring force to allow dirt particles to pass through. Also, a configuration i s . shown where the single piece arcuate valving control member may be easily removed and replaced from the top, which can also be used to easily provide some special patterns such as a strip spray (long rectangu-lar pattern). Having the arcuate valving member removable from the top of the head with as few parts as possible also greatly enhances the ease of manufacture and service. The nozzle exit may be molded into the end of a riser tube for a pop-up sprinkler without regard to having to assemble or service small cavities or holes from the underside.

The disclosed configuration ensures getting the sprinkler reassembled with the proper flow area to provide for a matched sprinkler precipitation rate.

In the configuration disclosed here, flow slot height (thickness) is manufactured into the parts giving them a known precipitation rate for particular parts regardless of what arc is set.

Still another feature of having the arc setting arcuate valving action take place below the exit of the nozzle is the ability to apply the adjustable arc of coverage feature to a stream rotary sprinkler of the type described in my Patent No. 4,353,50? and in Patents Nos. 4,842,201; 4,815,662; and 4,867,379.

A setable arc of coverage configuration for a rotating distributing nozzle is shown. The benefits of this invention eliminate the need to inventory the many separate arc slots or flow selection discs that other sprinklers of this type require.

In the disclosed configuration, the precipitation rate of water per unit area of coverage is fixed by the slot thickness, i.e., inches of precipitation per square foot per hour. As the arc of coverage is changed, the slot thickness remains constant for the increased arc and the sprinkler's total flow rate is increased proportionally to the increased arc of coverage .

It is an important feature that the flow slot be set to give a known precipitation rate so that as the sprinklers are used in various parts of a lawn, that all areas receive water coverage equally, i.e., one inch per square foot per hour, regardless of the arc that is set or a random adjustment that someone may make .

The manufactured fixed slot thickness created between the center shaft and the nozzle housing hole fixes the precipitation rate regardless of what arc is set for the improved adjustable arc of coverage nozzles of this invention. Upstream throttling to control the sprinkler range and patterns is provided for but the discharge design slot thickness is main-tained at the final discharge for all of the selected arcs and configurations.

A configuration is shown that provides for adjusting the range of coverage while retaining the distribution rate slot thickness. The range of coverage can be adjusted to compensate for system pressure differences at each head that has this added feature or throttle the pressure to the sprinkler's stream slot which will reduce the range of coverage and overall flow rate of the sprinkler. Other con-figurations are shown that selectively provide upstream discharge slot throttling around the selected arcuate slot for special sprinkler pattern effects.

It is the object of this invention to provide a simple, easily manufactured adjustable arc sprinkler that can be easily set for a desired arc of coverage and provides a predetermined uniform watering coverage pattern, regardless of what arc of coverage is set.

Another object is to provide a nozzle that can be easily cleaned.

Still another object is to provide a configuration where special pattern sprinklers can be provided by - - changing only a single part in a standard inventory housing .

A further object is to provide a simple two-part adjustable arc sprinkler where the arc selection member can be removed from the top (outside) for cleaning.

Another object of the invention is to provide, an arc. selection valving member setable from the outside of a rotating stream nozzle sprinkler for any desired arc of coverage.

Another object of the invention is to provide an adjustable arc of coverage fixed spray nozzle where the arc of coverage is setable and indicated on the top of the sprinkler.

Still a further object of the invention is to provide for various flow increases or decreases around the adjustable arcuate opening to produce particular patterns of different ranges as well as for the desired arc of coverage.

Another object is to provide an adjustable arc of coverage spray nozzle with an upstream of the nozzle pressure throttling means for spray pattern range control .

Brief Description of Drawings Figure 1 is a side elevational view of an adjustable arc of coverage spray nozzle with the cylindrical housing in cross-section, the spray deflector member partially in section, and with the arc set selection member shown in full; Figure 2 is a sectional view taken on the line 2-2 of Fi gure 1 ; Figure 3 is a top view of the spray nozzle of. Figure.1 showing the selected arc of coverage direct reading indication and with the addition of a center range correction adjustment screw having a hexagon-shaped socket as shown in Figure 4; Figure 4 is a cross-sectional side elevation view of a first modification of an adjustable arc of coverage spray nozzle with an upstream flow throttling adjustment screw added to control the coverage range, and with a clamping peripheral seal between matching axially offset spiral surfaces of the cylindrical housing and arc set selection member; Figure 5 is a cross-sectional side elevation view of a second modification of an adjustable arc of coverage spray nozzle with a combined arc set selection member and spray deflector member which is removable from the cylindrical top of a sprinkler riser; Figure 6 is a top view of a two-piece adjustable arc of coverage spray nozzle as shown in Figure 5; Figure 7 is a sectional view taken along line 7-7of Figure 5 showing the position of the fixed and movable ribs of the arc selection with slot end flow enhancement notches shown; Figure 8 is a sectional view taken along line 8-8 of Figure 5 showing the adjustable arcuate flow control slot as modified to produce a generally rectangular pattern; Figure 9 is a cross-sectional side elevation view of an adjustable arc of coverage rotating distributing nozzle on a sprinkler riser; Figure 10 is a sectional view of an adjustable arc of coverage rotating distributing nozzle sprinkler on a riser with a modified arc adjustment means which allows both of the arc extremes to be adjusted separately for proper alignment to the desired area of coverage on the ground.

Best Mode for Carrying Out Invention A basic spray nozzle assembly 1 with adjustable arc of coverage is shown in Figures 1 to 3. It has only three (3) parts to provide a spray that provides a matched precipitation pattern for all the spray heads used in a system regardless of what arc of coverage they are set for. The three parts are: (1) a cylindrical housing 3; (2) a spray deflector member 15; and (3) an arc set selection member 21.

The cylindrical, or annular, housing 3 is defined by an outer circular wall 5 and an inner wall 7. Inner wall 7 has an upper upwardly diverging surface 7A and a lower cylindrical surface 7B. A threaded skirt 11, for attachment to a riser for supply of pressurized water, extends down from the bottom of the housing 3. The upper diverging surface 7A has a narrow rib 13 protruding upwardly for mounting and spacing a flow spray deflector member 15.

Spray deflector member 15 is formed having an annular body 16 with a center cylindrical opening, or hole, 17. Annular body 16 has an annular top surface 18 with a small peripheral edge 20. The annular top surface 18 has a diameter substantially equal to the outer circular wall 5. An upwardly diverging deflecting surface 22 has its upper end connected to peripheral edge 20 and is positioned in the upwardly diverging surface 7A of housing 3 and extends to a point radially inwardly of cylindrical surface 7B. The inner surface of the cylindrical hole 17 is formed to meet the deflecting surface 22 at a circular edge A.

A recess 14 is formed in the upwardly diverging deflecting surface 22 to receive the rib 13. The rib 13 provides (1) the supporting means for the spray deflector member 15; and (2) the spacing means for properly spacing the upwardly diverging surface 7A and the upwardly diverging deflecting surface 22. The rib 13 is fixed in the recess 14 by being glued or sonic-welded .

Arc set selection member 21 comprises a cylindrical member 24 with an enlarged lower end 26.. Said enlarged lower end 26 appears as a sleeve-like member fixed to the cylindrical member 24 with a diameter larger than cylindrical member 24, and being coaxial therewith.

Said sleeve-like member has an upwardly facing spiral surface 28 extending substantially 360° around the cylindrical member 24, and a downwardly facing lower surface at the bottom of cylindrical member 24 for a greater part of its circumference forming a radial extension thereof. The remaining part 25 of the circumference is open along with material removed at 27 to provide an enlarged inlet upwardly to a point just' below the top edge of surface 28 and the front of the bottom edge of surface 28 where it enters the space between cylindrical member 24 and cylindrical surface 7B. Enlarged lower end 26 has a diameter sized to have a rotatable and slidable fit in the inner cylindrical surface 7B of housing 3, and cylindrical member 24 has a diameter sized to have a rotatable and slidable fit in the inner cylindrical surface of hole 17.

A narrow axial closure rib 36 is formed on the surface of cylindrical member 24 extending upwardly ■From the upper end o-f spiral surface 28. As it selects the proper arc, the arc set selection member 21 is permitted - to move axially, due to the cooperating o-f surface 28 and rib 38. Axial rib 36 has a slidable fit within cylindrical surface 7B. A narrow axial closure rib 38 is formed- on wal 1 7 of housing 3 extending along the inner lower cylindrical surface 78 from the bottom thereof, to meet with the rib 13, both being of the same width, on diverging surface 7A. The inner surface of axial rib 38 has a slidable engagement with cylindrical member 24.

The cylindrical member 24 has a groove 40 in the top thereof for receiving the end of a screwdriver, for example, for turning it to move axial closure rib 36 with respect to axial closure rib 38. It can be seen that an adjustable arcuate discharge slot 50 is formed between the movable axial closure rib 36, axial closure rib 38, cylindrical surface 7B, and cylindrical member 24. With spiral surface 28 biased against the lower end 38' o-f axial rib 38, such as by water' pressure, it can be seen that as the arc set selection member 21 is rotated clockwise to increase the adjustable arcuate discharge slot 50, the spiral surface 28 is cammed downwardly rotating the movable axial rib 36 away from the axial rib 38.

When the lower end of the arc set selection member 21 is below the bottom 42 of the cylindrical housing 3, the enlarged inlet provided by remaining part 25 and material removed at 27 is further enlarged by the admission of water flow over the spiral surface 28 to provide a greater supply as the adjustable arcuate discharge slot 50 enlarges. This movement of the lower end of arc set selection member 21 below the bottom 42 of the cylindrical housing 3 continues as long as the axial closure rib 36 has spacing to engage the bottom of axial closure rib 38. When the adjustable arcuate discharge slot 50 is fully open the arcuate discharge slot 50 is substantially a full circle, with the water flow from a riser or inlet pipe being directed directly into the fully open arcuate discharge slot 50.

Spray deflector member 15 has an arrowhead 19 on top surface 18 representing the location of axial closure rib 38, and arc set selection member 21 has an arrowhead 23 on its top surface representing the location of axial closure rib 36. Angular positioning of the spray nozzle is clearly indicated by indicia on the surface 18, such as 90°, 180° and 270°.

Three downwardly extending alignment and retention ribs 52 extend from the bottom 42 of cylindrical housing 3 around cylindrical surface 7B. It can be seen that the inner surface of these ribs 52 guide the enlarged lower end 26 of the arc set selection member 21 as it extends below its bottom. Further, inwardly projecting retention bumps, or projections, 54 prevent the arc set selection member 21 from dropping out of the cylindrical housing 3.

A modified spray nozzle assembly. 1A is s.hown in Figure 4. It has four (4) parts; the parts are: (1) a cylindrical housing 3A; (2) a spray deflector member 15; (3) an arc set selection member 21 A ; and . (4) an upstream pressure throttling adjustment device 60.

The cylindrical, or annular, housing 3A is formed as housing 3 of Figure 1 with the following exceptions: (1) the bottom 42A of the cylindrical housing 3A is -formed as a spiral surface 42A' from one side iof axial rib 38 to the other; (2) the threaded skirt 11 A is formed having an additional inwardly spaced downwardly extending annular member 62 having two diametrically opposed inlet cutout sections 64. The inlet cut-out sections' 64 extend into the annular space 66 which receives flow from below the nozzle assembly 1A.

- - Th e spray deflector member 15 is formed as it is in Figure 1.

The arc set selection member 21A is formed as arc set selection member 21 of Figure 1 with the following exceptions: (1) Arc set selection member 21A comprises a cylindrical member 24 with an enlarged lower end 26A. Said enlarged lower end 26A appears as a sleeve-like member fixed to the cylindrical member 24 with a diameter larger than cylindrical member 24, larger than inner cylindrical surface 7B, smaller than the inner diameter of annular member 62, and coaxial therewith. Said sleeve-like member has an upwardly facing spiral surface 28A extending substantially 360° around the cylindrical member 24, and a downwardly facing lower surface at the bottom of cylindrical member 24 forming an annular radial extension there--around. The enlarged lower end 26A has a diameter sized to have the outer part of spiral surface 28A engage the inner part of spiral surface 42A when biased upwardly by water pressure, for example, and cylindrical member 24 has a diameter sized to have a rotatable and slidable fit in the inner cylindrical surface of hole 17, as in Figure 1. (2) An axial cylindrical opening 70 extends through cylindrical member 24 to receive a threaded shaft 72 having a throttling disc 74 which has slidable engagement with the inner surface of annular member 62. The axial cylindrical opening 70 is internally threaded so as to permit threaded shaft 72 to be rotated such as by a hexagonal socket 76 and have axial movement to control placement of throttling disc 74 in relation to cut-out sections 64.' A narrow axial rib 36 is formed on the surface -of cylindrical member 24 extending upwardly from the uppe end of spiral surface 28A in line with the axial stepped ^surfa e 29. As it selects the proper arc, , the, arc set selection member 21A is permitted to move axially, due to the cooperating of sur-f aces 28A . and ]42A A narrow axial, rib 38 is formed on wall 7 of housing 3A extending along the inner lower cylindrical surface 7B from the bottom thereof, to meet with the rib 13, both being of the same width, on diverging surface 7A. The inner surface of axial rib 38 has a slidable engagement with cylindrical member 24 such as axial rib 36 has with cylindrical surface 7B.

The cylindrical member 24 has a groove 40 in the top thereof for receiving the end of a screwdriver, for example, for turning it to move axial rib 36 with respect to axial rib..38. It can be seen that an adjustable arcuate discharge slot 50A is formed between the movable axial rib 36, axial rib 38, cylindrical surface 7B, and cylindrical member 24. With spiral surface 28A biased against the spiral surface 42A, such as by water pressure, it can be seen that as the arc set selection member 21 is rotated clockwise to increase the adjustable arcuate discharge slot 50A, the spiral surface 28A is cammed downwardly rotating the movable axial rib 36 away from the axial rib 38.

Arcuate discharge slot area 50A is supplied with flow through the opening created by the stepped spiral surfaces' interaction as defined in Figure 4 by the opening between surfaces 42A' , 28A, 29 and the side of rib This supply area is desired to be two to three times the area of the discharge arcuate slot 50.

. A modified spray nozzle assembly 1B shown in Figure 5 is integrally connected to the top of a riser 80. This nozzle assembly IB comprises two parts: (1) a cylindrical housing 3B formed at the top of a riser 80; and (2) a combined spray deflector member 15B and arc set selection member 21B.

The cylindrical housing 3B includes an outer circular wall 5 and an inner wall 7. Inner wall 7 has an upper upwardly diverging surface 7A and a lower cylindrical surface 7B. Riser 80 supplies pressurized water to the nozzle assembly 1B. A narrow axial rib 38 is formed on wall 7 of housing 3B extending along the inner lower cylindrical surface 7B from the bottom thereof to the top of diverging surface 7A.

The top of arc set selection member 21B is formed with an upwardly diverging deflecting surface 22. The diverging deflection surface 22 has a round top. surface 18B with a small peripheral edge 20; a cylindrical member 24B extends downwardly from the bottom of the diverging surface 22. Cylindrical member 24B has an enlarged lower end 26B. Said enlarged lower end 26B appears as a sleeve-like member fixed to the cylindrical member 24B with a diameter larger than cylindrical member 24B, and being coaxial therewith. Said sleevelike member has an upwardly facing spiral surface 28 extending substantially 360° around the cylindrical member 24B, and a downwardly facing lower surface at the bottom of cylindrical member 24B extending for a greater part of its circumference forming a radial extension thereof. Enlarged lower end 26B has a diameter sized to have a rotatable and slidable fit in the inner cylindrical surface 7(J of housing 3B. Λ narrow axial rib 36 is formed on the surface of cylindrical member 2 ϋ extending upwardly from the upper end af spiral surface 28 in line with the axial stepped surface 27. As i t selects the proper arc, the arc set selection member 21B is permitted to move axially, due to the cooperating of spiral surface 28 and rib 38, as shown in Fig.7 The round flat top surface 18D of arc set- selection member 210 lias a groove 40 for receiving the end of a screwdriver, for example, for turning it to move axial rib 36 with es ect to axial rib 30. It can be seen that an adjustable arcuate discharge slot is formed between axial rib 36, axial rib 38, cylindrical surface 7D, and cylindrical member 24D. The operation -·'' is the same as in Figure 1.

The smaller part of this circumference of the radial extension of cylindrical member 24B left open is an opening 41 axially throug the low end of the spiral surface 20 adjacent stepped surface 29. A short projection 43 at the low end of the spiral sur-, face 28 prevents the low end 38' of the axial rib 38 from running into opening 41 and accidentally permitting the arc set selection member 213 to be disconnected.

Vihen it is desired to re'move arc set selection member 210, the arc set selection member 21B is moved downwardly and rotated to inten ionall align the axial i rib 38 with the opening 41.

To maintain the spray nozzle assembly 1B assembled with spiral surface 28 against the bottom of the axial rib 38, a spring 45 is placed between the bottom of the arc set selection member 21B and a small circular plate 47 supported by three equally spaced ribs 49 connected to the riser 80. A support and guide pin 51 is connected to the center of the bottom of the arc set selection member 21B and extends through the coil spring 45 and through a hole 53 in the middle of small circular plate 47. This arrangement provides for proper alignment and movement of the arc set selection member 21.8.

The arc set relationship of the right and left side.s of the spray pattern are shown by the arrowhead 79 and the rib 38 whose relationship can be seen from a view of the top of the spray nozzle.

Slot end flow enhancement notches can be formed as a radial cut-out into cylinder wall 7B adjacent the fixed axial rib 38 and radially inward cut 41 into cylindrical surface of enlarged end 26B and shaft 24B at the movable axial rib 36.

Figure 8 shows a modified sectional view looking down along line 8-8 of Figure 5 showing the adjustable arcuate discharge flow control slot of a modified arcuate valving means as modified to produce duplicate adjustable arcuate sprays 180° apart as is desired for strip spray sprinklers used to produce rectangular patterns.

The adjustable arcuate valving area has been configured to provide for two fixed axial ribs 38A and 38B with two movable axial ribs 36A and 36B and matching spiral surfaces 28A and 28B extending approximately 180° around the lower end of arc set member 21B but whose function is the same as that described for spiral surface.28 and fixed axial rib 38 in Figure 5.

Flow enhancement radial cut-outs at 78A and 75A and 78B and 75B enhance the amount of water at each side of each of the 180° apart spray patterns, giving these edges enhanced range and better defined rectangular corners.

Also shown is the concept of reducing the diameter of enlarged lower end 26B of arc set selection member 21B to provide a circumferential gap 77 between it and the housing cylindrical surface 7B. If this is done, a short range spray is produced for this thin sheet of water which strikes the flow deflector surface 22 and is deflected outwardly from the nozzle for all areas around the circumference where this thin gap 77 exists. The full adjustable arc spray pattern is produced between ribs 38A and 36A, and 38B and 36B as previously described for the single adjustable arc spray of Figure An adjustable arc of coverage rotating distributing nozzle sprinkler 100 is shown in Figure 9. This sprinkler consists of five (5) main parts as fol lows : (1) a fixed cylindrical housing, or riser 131; (2) arc set selection means 123; (3) rotating distributing head 121; (4) a fixed center bearing post 109; and (5) a center sleeve-like member 106.

The riser 131 has an annular cover flange 132 adjacent the top thereof having a center hole 133. Arc set selection means 123 includes an arcuate slot outer cylinder 104 mounted for rotation in center hole 133. An inverted truncated conical member OS positioned above the cover flange 132 has its smaller end fixed to arcuate slot outer cylinder 104 and has its larger end mounted on the top of riser 131 for rotation. A cylindrical member 102 is connected to the larger end so that it can turn the arcuate slot outer cylinder 104 when desired for arc selection. The arcuate slot outer cylinder 104 has a movable arcuate slot closure rib 105.

The fixed center bearing post 109 extends upwardly from a rotary drive housing 130 in the riser 131, into the arcuate slot outer cylinder 104 to the top thereof. A fixed arcuate slot closure rib 107 extends axially along the fixed center bearing post 109. An adjustable arcuate slot opening 120 is formed between the arcuate slot closure ribs 105 and 107, the surface of bearing post 109, and the inner surface of outer cylinder 104. The adjustable arcuate slot opening 120 is adjustable from the outside by cylindrical member 102. A sleeve-like member 106 having an upper spiral surface 112 and a flat lower surface is slidably placed over fixed center bearing post 109 with a slot at the location of the axially displaced ends of the spiral surface 112. The fixed rib 107 is placed in said slot. A coil spring 108 is placed around said fixed center bearing post 109 with one end against the flat lower surface of sleeve-like member 106 and the. other end against the top of housing 130. This spring action biases the spiral surface 112 against arcuate slot closure rib 105 for movement into or out of the space between center bearing post 109 and outer cylinder 104.

When the arcuate slot outer cylinder 104 is rotated in a counter-clockwise direction by cylindrical member 102, movable arcuate slot closure rib 105 cams the sleeve-like member 106 downward against spring 108 to provide a desired larger arcuate slot opening 120 to feed water pressure to the setable arcuate discharge orifice slot as previously described for the Figure 1 - - spray nozzle. When the arcuate slot outer cylinder 104 is rotated in a clockwise direction, spring 108 biases sleeve-like member 106 upward to provide a desired smaller arcuate slot opening 120.

Rotating distributing head 121 is fixed to a rotary drive shaft 150 extending from the upper end of bearing post 109. A drive mechanism is located in housing 130. As flow is discharged axially upward through the arcuate discharge slot opening 120, it strikes the rotating distributing head 121 and curved, diverging, deflecting surface 122. There are stream forming notches, or channels, 124 on this curved inverted conical surface 122. The arcuate discharge orifice slot axial sheet of water strikes surface 122 and is turned radially outward. The stream channels 124 collect some of the axial discharge sheet into discrete streams of water that have more momentum and penetrate the air to a greater distance than the spray droplets exiting the sprinkler deflector off a smooth surface 122.

Riser 131 has a water source connected to its lower end to provide the driving fluid for the rotating drive contained in housing 130 and then is supplied up through annula area 134 to the open area above the housing 130. An additional axial flow passage 170 is cut inwardly into the center drive shaft housing 130 and as top surface 112 is moved down below the top of passage 170, additional flow is provided.

For special pattern effects such as localizing increased range of coverage, an additional flow opening 160 may be provided in the lower inner surface 110 of slot outer cylinder 104 that faces the side surface of sleeve-like member 106. When sleeve-like member 106 is moved downward, at one point the top surface of the opening 160 becomes open above the spiral surface 112, admitting additional flow between the fixed rib 107 and movable rib 105.

In a modified form, the lower edge surface 110 of the slot outer cylinder 104 could have a matching spiral surface to that of the top surface 112 of the outer cylinder 104 to achieve the seal arrangement of Figure 4.

An' adjustable arc of coverage rotating distributing nozzle sprinkler 200 is shown in Figure 10. This sprinkler consists of seven (7) main parts as follows: (1) a fixed cylindrical housing, or riser 231; (2) arc set selection means 223; (3) . arc set selection means 323; • (4.) rotating distributing head 221; (5) a fixed center bearing post 209; (6) a bearing sleeve 211; (7) a center sleeve-like member 206.

The riser 231 has an annular cover flange 232 adjacent the top thereof with a center hole 233.

Arc set selection member 223 includes an arcuate slot outer cylinder 204 mounted for rotation in center hole 233. A flange extends from the bottom of cylinder 204 under the edge of flange 232 around the center hole 233. A flange-like member 190 is fixed adjacent to the top of the cylinder 204 and extends over the top of flange 232. Flange-like member 190 extends to the top of riser 231 and forms a rotatable upper cylindrical extension 192 of the riser 231. Cylindrical extension 192 is connected to flange-like member 190 so that it can turn the arcuate slot outer cylinder 204 when desired for arc selection. The arcuate slot outer cylinder 204 has an arcuate slot closure rib 205 thereon .

The fixed center bearing post 209 extends a short distance upwardly from a rotary drive housing 230 in the riser 231. Bearing sleeve 211 is posi-t-ioned in line with fixed center bearing post 209 and extends through the arcuate slot outer cylinder 204 to extend a small distance above the -top thereof. An arcuate slot closure rib 207 extends axially along the outer surface of the bearing sleeve 211 to the top thereof.

An inverted truncated conical member 243 positioned above the flange-like member 190 has its smaller end fixed to the top of bearing sleeve 211 by attachment to the top of rib 207 at 194 (other thin ribs can be used between the smaller end of inverted truncated conical member 243 and the top of bearing 2.11) and has its larger end mounted to a riser extension 182 of arc set selection means 323 on the top of cylindrical extension 192. An adjustable arcuate slot opening 220 is formed between the arcuate slot closure ribs 205 and 207, the surface of bearing sleeve 211 and the inner surface of outer cylinder 204. The adjustable arcuate slot opening 220 is adjustable from the outside by cylindrical extension 192 and cylindrical extension 182.

A sleeve-like member 206 has an upper spiral surface 212 and a flat lower surface and is slidably located over bearing sleeve 211 with a slot at the location of the axially displaced ends of the spiral surface 212. The fixed rib 207 is placed above said slot. An axial, groove 2H is located in the outer surface of bearing sleeve 211 adjacent the arcuate slot closure rib 207, and an axial projecting rib 240 extends inwardly on the inner surface of sleeve-like member 206 to slidably engage the axial groove 214. This permits relative axial movement between sleeve-like member 206 and bearing sleeve 211 and maintains fixed rotational movement therebetween.

A coil spring 208 is placed around said fixed center bearing post 209 and bearing sleeve 211 with one end against the flat lower surface of sleevelike member 206 and the other end against the top of housing 230. This spring action biases the spiral surface 212 against arcuate slot closure rib 205 for movement into or out of the space between bearing sleeve 211 and outer cylinder 204.

When the arcuate slot outer cylinder 204 is rotated in a counter-clockwise direction by cylindrical extension 192, arcuate slot closure rib 205 moves away from arcuate slot closure rib 207 to provide a desired larger arcuate slot opening 220. to feed water pressure to the setable arcuate discharge orifice slot. When the arcuate slot outer cylinder 204 is rotated in a clockwise direction, arcuate slot closure rib 205 moves toward arcuate slot closure rib 207 to provide a desired smaller arcuate slot opening 220.

When the bearing sleeve 211 is rotated in a counter-clockwise direction by cylindrical extension 182, arcuate slot closure rib 207 moves toward arcuate slot closure rib 205 to provide a desired smaller arcuate slot opening 220 to feed water pressure to the setable arcuate discharge orifice slot. When the bearing sleeve 211 is rotated in a clockwise . - - direction, arcuate slot closure rib 207 moves away from arcuate slot closure rib 205 to provide a desired larger arcuate slot opening 220.

Rotating distributing head 221 is fixed to a rotary drive shaft 250 extending from the upper end of bearing sleeve 211. A drive mechanism is located in housing 230. As flow is discharged axially upward through the arcuate discharge slot opening 220, it strikes the rotating distributing head 221 and curved, diverging, deflecting surface 222. There are stream forming notches, or channels, 224 on this curved inverted conical surface 222. The arcuate discharge orifice slot axial sheet of water strikes surface 222 and is turned radially outward. The stream channels 224 collect some of the axial discharge sheet into discrete streams of water that have more momentum and penetrate the air to a greater distance than the spray droplets exiting the sprinkler deflector off a smooth surface 222.

Riser 231 has a water source connected to its lower end to provide the driving fluid for the rotating dri e' contai ned in housing 230 and then is supplied up through annular area 234 to the open area above the housing 230. An additional inlet flow passage 225 is cut inwardly into the underside of sleevelike member 206 (see Figure 1).

While the principles of the invention have now been made clear in an illustrative embodiment, it will become obvious to those skilled in the art that many modifications in arrangement are possible without departing from those principles. The appended claims are, therefore, intended to cover and embrace any such modifications, within the limits of the true spirit and scope of the invention.

Claims (1)

1. 02152/5 C L A I M S Claim 1. A sprinkler nozzle with a changeable arc of watering, said nozzle haying a tubular body means with a center opening therethrough, said tubular body means having two ends, an inlet end for receiving pressurized water, a spray deflector means at. the- other end of said tubular body means having a deflecting surface for deflecting water outwardly, said spray deflector means having a top surface, means positioned in said center opening for orming an arcuate discharge slot means therewith for directing water flow onto said deflecting surface of said spray deflector means, the shape and size of said means which, is positioned in said center. opening providing different flow patterns therearound. Claim 2. A sprinkler nozzle as set forth in claim Λ wherein. said means positioned in said center opening is an arc set means having a cylindrical portion forming a valving means with said center opening. Claim 3. A sprinkler nozzle as set forth in claim 1 wherein said arcuate discharge slot means is of adjustable arcuate lengt , and includes means for adjusting tliu arcuate length' of said arcuate discharge slot m.eans from approximately -zero degrees to approximately , ■ three hundred sixty degrees with relatively movable arcuate discharge slpt end closures for adjusting the precipitation coverage to a selected ground coverage. 102152/3 Claim 4. A sprinkler no2zle as set forth in' claim 1, said center opening of said tubular body means having a cylindrical' section extending towards the inlet end, an arc set means being positioned in said cylindrical section for relative axial and rotational movement, said arc set means having a portion forming a valving means with said cylindrical section of said tubular body means, said arc set means ha v i ng a cylindrical portion positioned, in said cylindrical section for forming said arcuate discharge slot means for directing water flow onto sai-d spray deflector means . Claim 5. A sprinkler nozzle as set forth in claim 4 iacluding, a first axially extending rib on said cylindrical section defining an end surface of said arcuate discharge slot means between said cylindrical section and said cylindrical portion, a second axially extending rib on said cylindrical portion defining the other end surface of said arcuate discharge slot means between said cylindrical portion und said cylindrical section, said axially extending ribs being relatively movable and positioned to receive flow therebetween from the valuing means. Claim 6. A sprinkler nozzl as set forth in claim 5 including inlet means for providing additional flow between said arc set means and said cylindrical section to said arcuate discharge slot means. Claim /. Λ sprinkler noz2le as set- forth in claim 5 wherein said spray deflector means is fixed to said tubular body means. 1021.52/5 Claim 8- A sprinkler nozzle as set forth in claim 5 wherein said spray deflector means is fixed to said arc set means- Claim 9. A sprinkler noz2le as set forth in claim 7 wherein said spray deflector means has an opening therethrough, said arc set means having said cylindrical portion extend into, said opening. Claim 10. A sprinkler nozzle as set forth in claim 8 having biasing means biasing said arc set means upwardly. Claim 11. A sprinkler no2Zle as set forth in claim 8 having slot means for disconnecting said arc set means from said tubular body means- Claim 12. A sprinkler nozzle as set forth in claim 4 wherein said arcuate discharge slot means is of adjustable arcuate length and extends axially, said adjustable arcuate length of said arcuate discharge slot means being formed between two ribs, one rib on said cylindrical section of said center opening and a second rib on the cylindrical portion of said arc set means. Claim 13. An adjustable arc sprinkler nozzle as set forth in claim 12 wherein at least one of the two closure ribs is attached to said cylindrical portion of said arc set means which', is rotatably adjustable from the top surface of the spray deflector means to adjust the angular position of this closure rib. V:: . ' ' 33· set means with said movable closure rib has said spra deflector means attached thereto and is removable from the spray deflector end of said tubular body means. .Claim 15. A sprinkler nozzle as set forth in claim 4 wherein said cylindrical portion is positioned axially in said cylindrical section having a diameter smaller than said cylindrical section forming said arcuate. discharge slot means for directing water flow onto said spray deflector means, the arcuate length of said arcuate discharge slot means being defined .by a larger cylindrical portion on said cylindrical portion sized to have a movable tight fit with said cylindrical section of said tubular body means. Claim 16. A sprinkler nozzle, as set forth in cloim IS wherein said spray deflector means and said cylindrical portion are formed as a single. piece and removable from the other end of. the tubular body means. : Claijn 17. A sprinkler nozzle as set forth in claim. 2 wherein the spray deflector means and cylindrical portion are formed as a single piece and removable from the other end of the tubular bbdy means. 102152/5 Claim is. A sprinkler nozzle as set forth in claim 1 wherein said arcuate discharge slot means is of adjustable arcuate length, th« top surface of the spray deflector means has indicating means for presetting of the adjustable arcuate length, said indicating means pointing directly to eac limit of arcuate coverage. Claim 19. A sprinkler nozzle as. set forth in claim- 1 wherein said arcuate discharge slot means is of adjustable arcuate length for supplying water to a rotating stream distributor to discharge the water outwardly as rotating multiple streams over an adjustable arc of watering, said arcuate discharge slot means having an axially movable inlet yalving means for controlling flow to said arcuate discharge slot means, means for adjusting said arcuate length to change the arc of coverage without disassembling said nozzle. .Claim 20. A sprinkler nozzle as set forth in claim 4 wherein said tubular body means has an exit end, said spray deflector means spaced from the exit end of said tubular body means, said inlet end of said tubular body means, having a downwardly facing first spiral surface around said cylindrical section, said arc set means having a cylindrical portion formed of a first cylindrical portio and a second cylindrical portion, said arc set means having two ends, one end of said arc set means comprising said first 102152/5 cylindrical portion positioned in said center cylindrical opening for axial movement and rotation, the other end of said arc set. means Having said second cylindrical portion with a larger diameter than said fi'rst cylindrical portion, said second cylindrical portion forming a stepped peripheral surface with said first cylindrical portion, said stepped peripheral surface being formed having an upwardly- facing second spiral surface ending in. two axially spaced ends, said' first and second spiral surfaces overlapping each other providing a seal over the overlapping area to provide an adjustable, arcuate- inlet valving.means located at the inlet end of said cylindrica ical portion formi surized water onto