US 3432102 A
Description (OCR text may contain errors)
March 11, 1969 e. L. TURNER ETAL 3,432,102
LIQUID DISPENSING APPARATUS, MOTOR AND METHOD Filed Oct. 3, 1966 Sheet of BY a ATTORNEY March 11, 1969 e. L. TURNER ETAL 3,432,102
LIQUID DISPENSING APPARATUS, MOTOR AND METHOD Sheet i of Filed Oct. 3. 1966 grlv INVENTORS March 11, 1969 6.1.. TURNER ETAL 3,432,102
LIQUID DISPENSING APPARATUS, MOTOR AND MFTHC Sheet Filed Oct. 3. 1966 INVENTORS ATTORNEY G.L G.A RA D,E. BY 020 a March 11, 1969 G. L. TURNER ETAL 3,432,102
MOTOR AND METHOD LIQUID DISPENSING APPARATUS,
Sheet of 4 INVENTORS ATTORNEY Filed Oct. 5. 1966 United States Patent 15 Claims ABSTRACT OF THE DISCLOSURE This invention deals with a highly simplified wall-attachment fluid amplifier wherein the fluid (liquid) being delivered, for instance water from a lawn sprinkler, is used to automatically control itself during delivery, without outside control members, while providing turning power for the lawn sprinkler head portion, and in combination with a mechanical rotative shifting mechanism, actuated by the flowing water, becomes self-reversing in its rotative turning operation.
The present invention relates broadly to liquid dispensing methods and devices, and more particularly to lawn sprinklers and means for actuating same.
Lawn sprinklers of the motor driven movable sprinkling outlet type have been universally made with the motor portion having pivoted moving mechanical parts in the form of pivoted vanes, gears, valves or the like for moving the sprinkling outlet portion, in addition to reversing members commonly utilizing springs or toggle action devices where back and forth sprinkling over an adjustable size are is involved. A common form of nonmotor driven lawn sprinkler has a vertically mounted rotary head with outlet nozzles which make the sprinkler head spin in a horizontal plane due to including the nozzles of the head in a backward direction to provide a rotary jet reaction force. These lawn sprinklers generally have an uneven ring-like sprinkling coverage. Another common type lawn sprinkler has a humped-up-center generally horizontal tube with perforations in a row lengthwise thereof for delivering water in an up-and-over, back-andforth wave pattern with part or all of the water passing first through a mechanical motor which has moving parts in the form of pivoted vanes, paddles or the like connected to linkages to shift the horizontal tube back and forth about its substantially horizontal axis. The moving parts of these motors wear out in time, and at the same time are constantly subject to plugging with foreign matter which may get into the garden hose through which the sprinkling water is delivered to the sprinkler. The dismantling of these motors for repair or unplugging is generally relatively expensive and to be done by specialists in repairing this type of equipment, if same can be repaired. It was a recognition of these problems and difliculties which led to the conception and development of the sprinkler motor and sprinkler assembly of the present invention which utilizes a completely different principle of operation from that of lawn sprinklers now on the market.
Accordingly, among the objects of the present invention is the provision of a new type lawn sprinkler which may be operated by a sprinkler-driving-motor which has no moving mechanical parts, aside from the water dispensing rotatable sprinkler head itself, although if the sprinkler is to be of the reversing type for sprinkling in a reversible path, a reversing mechanism may be used with same and which, in turn, may have a mechanical movable part or parts.
n ICC Another object is to provide a liquid operated motor for lawn sprinklers and the like wherein said motor itself has no moving mechanical parts and where the liquid passing through the motor automatically shifts same to provide the power which rotatably operates the motor on a suitable support for same.
Another object is to provide a lawn sprinkler or the like having a venturi in the motor of the above noted type with no moving mechanical parts.
Another object is to provide a new method of bistable or flip-flop shifting the flow of a liquid under pressure to provide rotative power for a motor having no moving mechanical parts.
Another object is to provide improved sprinkling coverage by a lawn sprinkler through the use of a nomoving-mechanical-part water-actuated motor where the flowing water automatically shifts from one position to another and simultaneously is delivered from the motor outlet in first one direction and then another while same moves in either direction.
Another object is to provide a liquid operated motor with a special venturi having two substantially symmetrical suction inlets connected to separate vacuum cavities or passageways at opposite sides of the stream of liquid passing through said venturi and which cavities are alternately self-priming by means of a portion of the liquid passing through the venturi and out of the motor so that the path of liquid flow out of the venturi alternately shifts from side to side in a bistable or flip-flop pattern.
A further object is to provide a liquid operated motor for a lawn sprinkler with said motor itself having no moving mechanical parts, and wherein said sprinkler has separate adjustable mechanical means for reversing the rotaiive path of the sprinkler and predetermining the length of the arc, less than 360, to be sprinkled, with said motor acting as a sprinkler. and with which a separate fixed or adjustable sprinkling nozzle may be used, said nozzle preferably being in alinement with the outlet of said motor.
Still further Objects and advantages of this invention will appear as the description proceeds.
To the accomplishment of the foregoing and related ends, the invention, then, consists of the method and means hereinafter fully described and particularly pointed out in the claims, the annexed drawings and the following description setting forth in detail certain illus trative embodiments of the method and means of the present invention, such disclosed embodiments illustrating, however, but several of the various ways in which the principle of the invention may be used.
In the annexed drawings:
FIGURE 1 shows a top view of one form of lawn sprinkler embodying the present invention.
FIGURE 2 shows a side view of the lawn sprinkler illustrated in FIGURE 1.
FIGURE 3 is a fragmentary and enlarged section view as taken along line IIIIII of FIGURE 1, looking in the direction of the arrows.
FIGURE 4 is an enlarged section view of the inside of the motor as taken along line IVIV of FIGURE 2 looking in the direction of the arrows.
FIGURE 5 is an enlarged section view as taken along line VV of FIGURE 2 looking in the direction of the arrows.
"FIGURE 6 is an enlarged and partially sectioned side view of a modified form of a lawn sprinkler embodying the present invention, and as seen along line VI-VI of FIGURE 7 looking in the direction of the arrows.
FIGURE 7 shows a top view as taken along line VII- VII of FIGURE 6, looking in the direction of the arrows.
FIGURE 8 is a sectional view as taken along line 3 VIIIVIII of FIGURE 6, looking in the direction of the arrows.
FIGURE 9 is a sectional view of the inside of a modified form of the motor shown in FIGURE 4 as taken along line IX-IX of FIGURE 6, looking in the direction of the arrows.
FIGURE 10 is a fragmentary end view as taken along line X-X of FIGURE 6, looking in the direction of the arrows.
FIGURE 11 is a fragmentary and partially sectioned view as taken along line XIXI of FIGURE 6, looking in the direction of the arrows.
FIGURE 12 is a fragmentary and partially sectioned view as taken along line XII-XII of FIGURE 6, looking in the direction of the arrows.
Referring more particularly to FIGURES 1 and 2 of the drawings, it will be noted that one simplified form of the sprinkler 10 is shown and that the Working details of same are shown in FIGURES 3, 4 and 5. This sprinkler has a base 11 having a water inlet connection 12 adapted to be connected to a conventional garden hose 13 having a male coupling end 14. This water inlet connection 12 is on the inlet end of the water passageway 15, FIGURE 3, with the outlet end of said passageway 15 being at the top of said sprinkler base 11. This outlet end of water passageway 15, as shown, is substantially vertical and provided with internal threads 16 which are preferably of the tapered pipe thread type adapted to receive the threaded end of coupler 17 which is provided with like type external threads. As shown in FIGURE 2, this coupler 17 is preferably provided with hexagonal portion 18 so that same can be engaged with a suitable size wrench and tightened in place as shown in FIGURE 3. Rotatably fitting inside of coupler 17 is a tubular sleeve 19 having an outwardly flanged lower end 20. A gasket 21 fits between flanged end of sleeve 19 and the end of coupler 17 to form a fluid tight connection at this point while allowing sleeve 19 to be freely rotatable in said coupler. Coupler 17 and also 17a may be either of metal or plastic and it is intended that the showing be considered as diagrammatically illustrating either. The upper end of sleeve 19 is preferably of a drive fit into the lower end of the sprinkler head assembly 23, although the two could be joined with threads or the equivalent, and it is intended that such be considered to be diagrammatically shown. This sprinkler head assembly 23 has a main sprinkling outlet duct 24 carrying an outlet nozzle 25, which may be plain or adjustable, on its outer end with such nozzle having a distance throw and sprinkling pattern of adjustable or predetermined type supplementing the water discharge from motor 26. At the opposite end of said sprinkler head assembly 23 from that carrying the outlet nozzle 25 is said fluid motor 26 which has no mechanical moving parts and which will be described in detail hereinafter. This assembly is especially adapted for continuous rotation where the nozzle 25 provides the distant sprinkling and the fluid motor 26 provides for sprinkling closer to base 11.
A sprinkler 10a of modified construction is shown in partial section in FIGURE 6 with same having a conventional base 11 with water inlet connection 12 joined to a garden hose 13 by means of a male coupling half 14 threadedly engaging said inlet connection 12. The outlet of the base 11 in turn is likewise provided with internal threads 16 into which a modified form of coupler 17a is threadedly engaged. This coupler 17a also has rotatably fitting therein a sleeve 19 with lower outwardly flanged end 20 and a gasket 21 as before described. A modified form of sprinkler 23a is fixedly mounted on the upper end of sleeve 19 preferably by means of a drive fit into the lower end portion 22a of sprinkler head assembly 23a although threads or the like could be used if desired and such is to be considered as having been diagrammatically shown both here and in FIGURE 3. Here again we have a fluid motor 26a connected to water passageway 15 through sleeve 19.
Also connected to water passage 15 at the outlet end of sleeve 19 is a passageway 27, the outlet of which is closable by means of a valve 28. This valve 28 has a cylindrical portion 29 which closely but rotatably fits cylindrical bore 30 in the sprinkler head assembly so that when in its forward posit-on, as shown in FIGURE 6, it will substantially prevent fluid flow through passageway 27 and out through passageway 24:: which is the main outlet of the sprinkler head assembly with end 25a acting as the sprinkler outlet nozzle. Valve 28 is provided with steep rapid-action threads 31 which engage corresponding threads 32 in the body 33 of sprinkler head assembly 23a. At the opposite side of the threads 31 from the cylindrical end portion 29 of valve 28, the latter is provided with a cylindrical groove 34 in which is fitted an O-ring 35 to prevent leakage of liquid backward past threads 31 of valve 28 while, at the same time, frictionally stabilizing valve 28 against shifting under conditions of operation. Fixedly mounted on the outer end of valve 28 in conventional manner, such as for instance adhesively, is an operating knob 36. Rotation of this knob through the interaction of the steep rapid-action threads 31 and 32 will move valve 28 endwise corresponding to the direction of rotation 30 that by moving valve 28 forward as shown in FIGURE 6 the flow of fluid through passageways 27 and 24a will be substantially stopped while rotating the valve 28 in the opposite direction will move the cylindrical portion 29 of valve 28 to the left to progressively expose more and more of passageway 27 for delivery of water to outlet duct 24a for sprinkling purposes through its outlet nozzle end 25a which it is intended to be considered as diagrammatically showing either a plain or an adjustable nozzle. This type of construction where the outlet nozzle 25a and the outlet of fluid motor 26 point in the same direction is adapted for either round-and-round operation or reversing arcuate operation.
Referring now to FIGURES 4 and 9 it will be n ted that the interior of. the fluid motor consists of several fixed portions including the inlet end 37, FIGURES 3 and 4, which is substantially at the juncture of the top of sleeve 19 and the starting end of outlet duct 24, FIG- URE 3. A duct 38 extends from water inlet end 37 substantially to the inner end of waterway 39 which is between directional walls 40 and 41. These walls preferably taper outward as seen in FIGURE 4 from the inlet end of water 39 and then for a short distance adjacent the outlet end 44 of same have inwardly directed curved portions 42 and 43. These inwardly curved portions 42 and 43 terminate short of reaching each other and form an outlet 44 which is preferably wider than inlet 45 which is adjacent the outlet end of duct 38. Housing 46 of the fluid motor 26 has an outer discharge opening 47 so that a liquid such as water flowing through duct 38 and inlet 45 into waterway 39 will flow out through outlet 44 from said waterway and out through outlet 47 of housing 46. The outlet portion of duct 38 to and including the inlet portion 45 of waterway 39 form the venturi 54 of the fluid motor 26. Directly behind directional walls 40 and 41 of the fluid motor 26 are vacuum cavities or passageways 48 and 49, with said vacuum cavities respectively having fluid inlets 50 and 51. These vacuum cavities 48 and 49 respectively terminate substantially symmetrically at opposite sides of the venturi 54 where the outlet end of duct 38 joins the inlet 45 of waterway 39.
The operation of fluid motor 26 depends upon several factors which will now be explained in detail. Water flowing under pressure through inlet 37 into duct 38, through venturi S4, and into and through waterway 39 and out through outlets 44 and 47 will, if vacuum cavities 48 and 49 are plugged, permit the stream of water to flow in a substantially straight line through the motor and out of outlet 47. However, if vacuum cavities 48 and 49 are not plugged, then the venturi 54 will create substantially equal vacuums at the outlet ends 52 and 53 of vacuum cavities 48 and 49. However, a little of the stream of water passing through waterway 39 will gradually enter either or both of the fluid inlets 50 and 51 of vacuum cavities 48 and 49, respectively. The vacuum created by venturi 54 at the outlet ends 52 and 53 of the vacuum cavities 48 and 49 will draw this water received at inlets 50 and 51 down through thes vacuum cavities and as soon as one of these cavities gets a little more loaded with water than the other and the Water in one of these cavities reaches its outlet end 52 or 53, this will vary the vacuum at the outlet ends of these vacuum cavities and the stream of water passing through waterway 39 will then shift out of a straight lin and substantially follow the inner surface of one of the directional walls 40 or 41. This water following the wall will come to the corresponding inwardly curved portion 42 or 43 of same which will deflect at least a portion of the stream so that it passes out through outlet 47 at an angle to the center line of fluid motor 26. Suppose, for instance, that the fluid motor 26 is operating and the water is flowing along the inner surface of directional wall 40 and then around the outwardly curved portion 42 of same the resultant stream, FIGURE 4, would be directed nearer to fluid inlet 51 than to fluid inlet 50. There would accordingly be a small opening between the outer face of this stream and the outer end of fluid inlet 50 so that some air could flow into such inlet end 50 to follow water already in and flowing through same. On the other hand, this stream would be closer to the fluid inlet 51 of vacuum cavity 49 so that some of this water would pass into th inlet end 51 of the noted vacuum cavity to follow air already in and flowing through same. As soon as the leading end of this so received water flowing down vacuum cavity 49 reaches fluid outlet 53 this water would throw the vacuum created by venturi 54 out of balance and the stream of water flowing through waterway 39 will shift over from directional wall 40 to directional wall 41 and along its inwardly curved outlet portion 43 and then through outlet 44 and out through outlet 47 of the housing 46 of fluid motor 26. Here it is to be noted that the stream now clears fluid inlet 51 of vacuum cavity 49 and allows air to flow into this inlet to follow Water therein while some of the water flows into inlet 50 of vacuum cavity 48 to follow air therein. The vacuum created by venturi 54 thus pulls th previously delivered water followed by air down vacuum cavity 49 to its fluid outlet 53 while the water flowing into inlet 50 of vacuum cavity 48 gradually travels down the latter until it reaches fluid outlet 52 which again unbalances the vacuum created at the venturi 54 and the stream of water again reverses and starts traveling down the inner sur- 7 face of directional wall 40 to repeat the previous cycle. It is to be noted that we thus have a stream of water which is stable in two states, but only one at a time, namely along the inner wall or surface of directional wall 40 or along the inner surface of directional wall 41. This fluid motor accordingly may be termed a bistabl or flip flop device, while the following of the water along one or the other of the directional walls 40 or 41 may in a sense be referred to as a centrifugal effect.
Again referring to FIGURE 4, if the outlet 44 from waterway 39 is concentric with the longitudinal center line of the assembly and likewise if the outlet 47 of fluid motor 26 is symmetrical with said center line, and vacuum passageways 48 and 49 likewise symmetrical then, the stream of water delivered out through outlet 47 will substantially equally shift back and forth in step with the shifting of the vacuum at opposite sides of venturi 54. A device of this type could be held in the hand and through the back and forth motion of the water delivered from the outlet end 47 could be used to sweep or wash a sidewalk or the like while holding the fluid motor in a straight forward position and then walking forward with same. On the other hand, if this motor is to be part of a rotary lawn sprinkler then among other things outlet 47 of fluid motor 26 may be modified so as to not be symmetrical. This can be accomplished for instance as shown in FIGURE 4 by placing a small water obstruction 55 in one edge of outlet 47. This would cause the fluid motor of FIGURE 4 to be subjected to a counterclockwise turning effect. This turning effect is produced by the stream of water being squeezed along directional wall and curved portion 42 and then out through outlet 47 with a portion of the stream hitting this obstruction 55 which diverts same slightly from a straight outward direction thus reducing the clockwise rotation reaction component of this stream. However, when the stream reverses and follows the inner surface of directional walls 41 and 43 with no obstruction in outlet 47 adjacent inlet 50 this will direct this stream outward at an angle to the end of fluid motor 26 and thus produce a full counterclockwise turning effect so that the two counterclockwise components are greater than the two clockwise components with the result that the sprinkler head assembly will rotate in a counterclockwise direction. We thus have a fluid motor 26 which, when assembled as shown in FIGURES l, 2 and 4, would, for the reasons explained, continuously rotate under operating conditions in a counterclockwise direction, although the rotation would be clockwise if the obstruction 55 were placed at the opposite side of outlet 47. A modification which would result in producing a continuous rotation component, even without obstruction 55 at one edge of outlet 47, would involve making one of the vacuum cavities or passageways 48 and 49 of a different size than the other. The stream delivered from outlet 47 would then flow longer in one direction than the other to thus provide the differential turning component.
Referring now to FIGURES 1, 2 and 3, with the interior of the fluid motor 26 formed as shown in FIGURE 4, the main stream of water flowing through the sprinkler 10 passes through outlet duct 24 and outlet nozzle 25 for sprinkling an area extending a considerable distance away from the point where the sprinkler sits on the ground. At the same time the fluid motor 26 is rotating nozzle 25 in a circular path, the water flowing through the outlet 47 of fluid motor 26 will be shifting back and forth through its bistable or flip-flop action to sprinkle a circular area closer to the point where the assembly sits on the ground than the main area sprinkled by nozzle 25 thus giving a more uniform sprinkling coverage. Tests with this sprinkler utilizing the fluid motor described above indicate that the sprinkler will operate on a much lower pressure and rotate satisfactorily than is the case with other types of motor driven sprinklers. It was also noted in conducting tests with this special form of motor that where the vacuum cavities 48 and 49 are small the reversal of the stream of water flowing out through outlet 47 is much faster than when these cavities were larger, as shown, for instance, in FIG- URE 9.
The proportionate dimensions of one size of the fluid motor of an operating model sprinkler made as shown in FIGURES l to 5, inclusive, are substantially as follows: The housing 46 is approximately 4% inches long, 1 /2 inches wide at the outlet end, and 1% inches Wide at its inlet end. The inlet 37, FIGURE 4, is about A inch in diameter and approximately 1% inches from the inlet end of housing 46, with all of the passageways 38, 39, 44, 47, 48 and 49 being approximately /s inch deep. Passageway 38 is approximately /8 inch wide as are outlets 52 and 53. The inlet between walls 40 and 41 is about 5 inch wide, and the outlets 44 and 47 are approximately inch wide, while inlets and 51 are about inch Wide. Passageway 39 is approximately inch wide at its widest point which is about /4 inch from the outlet end of housing 46. The passageway 39 preferably smoothly curves from its widest point to its outlet 44. Substantially the only major variation between the passageway construction shown in top view in FIGURE 4 as contrasted with that of FIGURE 9 is that passageways 48 and 49 are enlarged as at 48a and 49a of FIG- URE 9 which increases the volume of these passageways and SlOWs down considerably the rate of fiip flop action of the stream of liquid passing through passageway 39 and out of housing outlet 47 which is preferably tapered sidewise as shown. It is the alternate drinking of all of the water in either vacuum passageway 48 or 49 (4811 or 4911) at and through outlet 52 or 53 into stream 39 at venturi 54 which determines how long the stream 39 will hug first one wall 40 or 41 and then the other, and thus the shifting of direction of the water flowing out of outlet 47. While the noted dimensions form a typical operating construction for a conventional size lawn sprinkler, they are by no means to be considered as a limitation on the invention but rather are presented to better facilitate understanding the principle of opcra tion of same.
Instead of having a sprinkler which, in operation, continuously moves round and round, it is sometimes desirable to have a sprinkler which will be reversible so as to sprinkle an area less than 360 around the point where the sprinkler assembly rests on the ground. A sprinkler capable of doing this is shown in FIGURES 6 to 12, inclusive, and the operation of same will now be described.
This reversing sprinkler construction utilizes a pivoted reversing bar 56, FIGURE 8, which, under operating conditions, is moved back and forth about pivot 57. The outer end of this pivoted reversing bar 56 is provided with a reaction blade 58 which is movable from side to side of outlet 47, FIGURE 9 for a purpose to be hereinafter described. As illustrated in FIGURES 8 and ll, the lower end portion 221: of sprinkler head assembly 23a is provided with notches 59 and 66 in the opposite sides of same and which form stabilizing guides for the reversing bar 56 mounted on its pivot 57. At the opposite end of reversing bar 56, FIGURE 8, from that carrying reaction blade 58 is a downwardly extending operator bar 61. The installing of the reversing bar 56 on the underside of the sprinkler head assembly 230 is done by springing the side bar members 62 and 63 of the reversing bar 56 sidewise, FIGURE 8, following which the reversing bar is slid up over coupler 17a and then the lower end portion 22a of the sprinkler head assembly until the underface of same is contacted, providing of course that the coupler 17a is already mounted in place on the sprinkler head assembly 23. These bar members 62 and 63 are then allowed to spring back to their normal position where they will fit and be supported in notches 59 and 60 as shown in FIGURE 11. With the reversing bar in this position and mounted on pivot 57 f the rotary movement of operator bar 61 in either direction will automatically move reaction blade 58 in the opposite direction in outlet opening 47 of the sprinkler head assembly 230 to the end of said opening.
In the assembly shown in FIGURE 6, it will be noted t that the coupler 17a is provided with a cylindrical notch 64 on which is mounted a pair of reversing members 65 and 66 held in place by means of a snap ring 67 which fits a groove 68 in the coupler 17a. This snap ring 67 holds the two reversing members 65 and 66 tightly together. Between these two reversing members is placed an O-ring 69 which frictionally holds the reversing members 65 and 66 fixedly in adjusted position. The reversing members 65 and 66 respectively have adjusting cars 70 and 71, FIGURES 6 and 12, which are at opposite sides of operator bar 61 of the pivoted reversing bar 56. The spacing of the adjusting ears 70 and 71 apart with the operator bar 61 between them determines the length of the are through which the sprinkler head assembly 23a will travel during its sprinkling operation.
With the reaction blade 58 at one side of outlet 47 of sprinkling head assembly 23!: and with reversing members 65 and 66 adjusted to the desired sprinkling arc size. the turning on of water Under pressure for delivery through hose 13 into the sprinkler 100 will cause the sprinkler head assembly 23a to move either counterclockwise or clockwise, depending upon the position of the reaction blade 58 in outlet 47. If this blade, as seen in FIGURE 9, is at the lower end of outlet 47 the sprinkler head assembly 2311 will move in a clockwise direction as viewed from the top. This will move operator bar 61 toward adjusting car 71 of reversing member 66, FIGURE 12. When this operator bar 61 reaches adjusting ear 71 the continued clockwise motion of the sprinkler head assembly 230 will start moving the reaction blade 58 toward the upper end of outlet 47, as seen in FIGURE 9. The stream of water passing through said outlet 47 will soon catch the reaction blade 58 and swing same completely to the upper end of outlet 47 whereupon the sprinkler head assembly 23a will start moving in a counterclockwise direction which will continue until the operator bar 61 comes in contact with adjusting ear so that further rotation with sprinkler head assembly 23a in a counterclockwise direction will start moving the reaction blade 58 downward in outlet 47, FIGURE 9. where the flow of: water through outlet 47 will again swing the reaction blade 58 to the lower end of its travel whereupon sprinkler head assembly 23a will reverse its direction of rotation and start moving in a clockwise direction as seen from the top. This shifting of the reaction blade 58 from side to side of outlet 47 provides the arcuate sprinkling of the sprinkler shown in FIG- URE 6.
While two preferred embodiments of the invention have been illustrated and described herein, it is to be understood that minor modifications may be made in the sprinkler as well as the construction of its operating motor within the spirit and scope of the invention, as herein set forth. It is also to be noted that while directional terms have been used, same are not to be construed as a limitation of the invention since such use has been availed of to better describe the invention as illustrated.
Other modes of applying the principle of our invention may be employed instead of those explained, change being made as regards the means and the methods herein disclosed, provided those stated by any of the following claims or their equivalent be employed.
We therefore particularly point out and distinctly claim as our invention:
1.. A lawn sprinkler which comprises,
(a) a sprinkler head assembly,
(b) means supporting said sprinkler head assembly in rotatable operating position and delivering liquid under pressure to the inlet of same,
(c) a fiuid operated motor forming part of said sprinkler head assembly and having a liquid passageway therethrough for said liquid delivered to the inlet of same,
(d) said motor having a venturi at the inlet end of said liquid passageway,
(e) a pair of directional Walls inside of said motor forming said liquid passageway therebetween and diverging outward from said venturi and then inward adjacent the outlet end of same so that the ends of said passageway between said directional walls are narrower than the widest interior portion of said passageway,
(f) said motor having a vacuum cavity behind each of said directional Walls,
(g) said motor having a vacuum connection from each of said vacuum cavities to said venturi with said vacuum connections being substantially opposite to each other,
(h) said sprinkler head assembly having a fluid motor body containing said motor with said motor body having an outlet which is substantially symmetrical with the outlet from between said directional walls, and adjacent to same, and
(i) said motor having the inlet end of each of its vacuum cavities symmetrically located between the outlet ends of said directional walls and the adjacent edges of said outlet of said motor body, wherein the liquid flowing between said directional walls, and at least partially following one of said directional walls,
to side of said motor body outlet to cause said lawn sprinkler to travel first in one direction and then the (a) a housing having an inlet at one end and an outlet at its other end,
(b) said housing having a passageway extending substantially symmetrically from inlet to outlet of same,
(c) a venturi in said passageway adjacent said inlet,
will be diverted at least moderately sidewise by the (d) said housing having directional walls substantially inwardly directed end of said directional wall so as. symmetrically spaced from each other to form a to substantially clear the adjacent vacuum cavity inpassageway expanding and then retracting as it exlet while partially contacting the opposite edge of tends from aid venturi to said outlet, said outlet from said motor body and delivering (e) said housing having a pair of vacuum cavities in some of the fluid stream into the inlet of the other same with one being behind each of said directional vacuum cavity and which liquid is drawn through walls, that vacuum cavity to the venturi where it varies the (f) id ho ing having a vacuum connection from Vacuum at that Point and Causes liquid how each of said vacuum cavities into said venturi with through Said liquid Passagfiway between Said said vacuum connections being substantially symrectional walls and substantially adjacent the first t i l and opposite to h other, and of same to shift and substantially follow the other (g) id h i having i l t a h of aid vacuum of said directional walls with the result that the outi i b t e th d of the adjacent directional let stream continuously reverses back and forth as 11 d th corresponding edge of the outlet from the liquid Passing through the Vehhhi out of said housing with said housing outlet being at least Said Outlet of said motor y Continues t0 as wide as but substantially no smaller than the outlet A p as set forth in Claim 1, wherein between said directional Walls, wherein when operat- Said motor y has walls for Producing gl'ealfil ing said motor on a liquid such as water the stream turning reaction in one direction than in the other to f water passing through id passageway between cause i sprinkler d assembly to rotate in one said directional walls will shift back and forth as it direction. passes through said housing outlet so as to uncover A Sprinkler 35 Set forth in Claim wherein one vacuum cavity inlet while delivering some water Un means for producing greater turning reaction to the inlet of the other vacuum cavity, with such in one direction than the other is at the outlet of said water entering h vacuum cavity inlet flowing motor Y and is in the form of a reaction means through said vacuum cavity to its connection to said normally located at one Side and then the other of venturi which then unbalances the vacuum produced Said motor y Outlet and shifts the Water flow sidewise in said passageway A lawn Sprinkler as Set forth in Claim 3, wherein between said directional walls and out of said housthere is an arm on the end of which Said reaction ing outlet so as to uncover the other vacuum cavity means is mounted, inlet and deliver water into the opposite vacuum cooperating means on Said motor body and Said cavity inlet for flow therethrough to the other inlet arm for Pivotally mounting and Supporting the latter connection to said venturi to again unbalance the with said reaction means movable with said arm vacuum producgd and hift the fl f water id from fi to Side Of Said mOtOl' y Outlet, and wise in the opposite direction to thus continue the means Shifting Said reaction means from Side 40 series of back and forth flow of water from the outlet of said housing. 8. The fluid operated motor as set forth in claim 7,
other. 5. A lawn sprinkler as set forth in claim 1, wherein its method of operation comprises wherein there is (a) means utilizing the back and forth shifting of said liquid flow out of the outlet of said housing to pro- (a) delivering liquid under pressure through the inlet thereof,
(b) passing said liquid through a vacuum producing (a) varying the reaction force of said back and forth oscillating discharge liquid so that it is greater at one side than the other to produce a turning force.
7. A fluid operated motor for lawn sprinklers and other uses, which comprises duce a turning force on said housing. 9. A fluid operated motor as set forth in claim 7,
wherein p y, (a) said housing passageway extending substantially and at Once delivering Said Vacuum producing symmetrically from inlet to outlet of same is relaliquld through a gradually expanding and then tively wide and thin with the inlets to said vacuum tracting Substantially Symmetrical passageway and cavities being alongside the thin edges of the outlet discharging same out of the latter, f i housing,
((1) alternately returning a portion of said discharge 1 Aiawn sprinkler hi h comprises,
liquid first to one side and then the other of said (a) abase havingasupporting b t tion, vacl'lunl Produclng passageway 5111159111131! at P- (b) said base havingatubular passageway therethrough poslte sldesof same where it joins said flow of liquid with an upwardly i d Outlet b t ti ll creahng F Vacuum, f pendicular to said bottom portion,
( followlflg h POrtlorl 0f 531d hq delivered (c) said base having a connecting means at the inlet of alternately to sand Vacuum Pmducmg passageway said passageway and connecting means at the outlet with a gas flow portion, whereby said alternately reth f turned portions of 1iquid will alternately vary the (d) a coup! meal-l5 h i a connecting means for Vacuum effect of 531d flow of Vacuum creating liquid joining same to said connecting means at the outlet so that the liquid passing out of said substantially f Said base,
Symmetrical passageway Will oscillate hack and fOTth (e) said coupler means having a longitudinal bore full in step with the alternate return of said portions of l h h f,
liquid followed y gas 10 Said Vacuum Producing (f) a sleeve having a tubular body and an outturned p y flange on its inlet end with said tubular body closely A lawn Sprinkle!" E15 Sgt forth in Claim wherein but rotatably fitting the longitudinal bore of said said method of operation includes coupler,
(g) a ring gasket fitting between said outturned flange of said sleeve and the inlet end of said coupler so that when said coupler is tightened in place on said base, said sleeve and gasket will be freely rotatable while forming a seal under operating conditions between said flange and the inlet end of said coupler,
(h) a sprinkler head assembly having a body portion with a downwardly and endwise projecting fluid inlet boss at the inlet end of the same,
(i) the outlet end of said body portion being moderately inclined upwardly from said boss when mounted in rotary operating position on said base,
(j) said sleeve extending through and above the upper end of said coupler,
(k) means joining the upper end portion of said sleeve in fluid tight manner to the lower inlet end portion of said boss on the inlet end of said body portion of said sprinkler head assembly,
(I) a fluid motor forming a part of said sprinkler head assembly and having a liquid passageway therethrough,
(m) said fluid motor having a venturi at the inlet end of same,
(n) a pair of directional walls inside of said motor forming said liquid passageway therebetween and diverging gradually outward from said venturi and then inward in limited amount adjacent the outlet end of same so that the ends of said passageway are narrower than an interior portion thereof,
(0) said motor having a vacuum cavity behind each of said directional walls,
(p) said motor also having a vacuum connection from each of said vacuum cavities to said venturi with said vacuum connections being substantially symmetrical and substantially opposite to each other,
(q) said fluid motor body having an outlet approximately 215 large as the outlet from between said directional walls, substantially symmetrical with, and adjacent same, and
(r) said vacuum cavities having their inlet ends substantially symmetrically located between the outlet ends of said directional walls and the adjacent edges of said outlet of said fluid motor body, wherein the liquid flowing between said directional walls, and at least partially following one of said directional walls, will be diverted at least moderately sidewise by the inwardly directed end of said directional wall so as to substantially clear the adjacent vacuum cavity inlet while partially contacting the opposite edge of said outlet from said fluid motor body and delivering some of the fluid stream into the inlet of the other vacuum cavity and which liquid is drawn through that vacuum cavity to the venturi where it varies the vacuum at that point and causes the liquid flow through said liquid passageway between said directional walls and substantially adjacent the first of same to shift and substantially follow the other of said directional walls with the result that the outlet stream continuously reverses back and forth as the liquid passing through the venturi and out of said outlet of said liquid motor body continues to flow and the vacuum at opposite sides of said venturi connected to said vacuum chambers alternately changes.
11. A lawn sprinkler as set forth in claim 10, wherein (a) said fluid motor body outlet has a small obstruction at one side of same so as to have the flowing liquid passing back and forth through said outlet impinge on one side of said motor body outlet more than the other to produce a turning effect on said sprinkler head assembly in the direction of the side of said motor body outlet having said obstruction.
12. A lawn sprinkler as set forth in claim 11, wherein (a) said small obstruction is in the form of a reaction blade,
(b) means in the form of an arm on the outer end of which is mounted said reaction blade so as to be shiftable with it,
(c) cooperative means on said motor body and arm for supporting and pivotally mounting the latter with said reaction blade movable from side to side of said liquid motor body outlet,
(d) downward and rearward projecting means on the end of said arm remote from said reaction blade end,
(e) a pair of independently adjustable reversing members shiftably and rotatably mounted on said coupler with an car on each of them, and with the projecting means of said arm between and contaetable by them, and
(f) means for adjustably holding said pair of reversing members in predetermined adjusted position for actuating said shiftable arm first in one direction and then the other under operating conditions to thus shift said reaction blade from side to side of said fluid motor body outlet to limit to a predetermined amount the sprinkling arc of the lawn sprinkler.
13. A lawn sprinkler as set forth in claim 11, wherein (a) said body portion has a sprinkling outlet means for liquid in addition to the outlet from said liquid motor,
(b) said sprinkling outlet being substantially in the same vertical plane as includes the inlet and outlet of said fluid motor so that same will allow said fluid motor to control the direction of rotation of said lawn sprinkler.
14. A lawn sprinkler as set forth in claim 13, wherein (a) said fluid motor includes means for controlling the flow of liquid from the inlet of said fluid motor to and through said sprinkling outlet means.
15. A lawn sprinkler as set forth in claim 14, wherein (a) said means for controlling the flow of liquid to and through said sprinkling outlet means is in the form of an adjustable valve.
References Cited UNITED STATES PATENTS 2,619,383 11/1952 Jepson 239231 2,691,547 10/1954 Campbell 239-255 X 2,745,699 5/1956 Orr 23923l 3,159,168 12/1964 Reader l37--81.5 3,244,189 4/1966 Bailey l37-8l.5 3,331,380 7/1967 Schonfeld et al. 137-815 3,348,562 10/1967 Ogren 137-815 M. HENSON WOOD, JR., Primary Examiner.
M. V. MAR, Assistant Examiner.
US. Cl. X.R.