CA1301215C - Adjustable cam controlled sprinkler - Google Patents
Adjustable cam controlled sprinklerInfo
- Publication number
- CA1301215C CA1301215C CA000468223A CA468223A CA1301215C CA 1301215 C CA1301215 C CA 1301215C CA 000468223 A CA000468223 A CA 000468223A CA 468223 A CA468223 A CA 468223A CA 1301215 C CA1301215 C CA 1301215C
- Authority
- CA
- Canada
- Prior art keywords
- nozzle
- water
- camming
- camming surface
- cam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
- B05B3/04—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet
- B05B3/0409—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet with moving, e.g. rotating, outlet elements
- B05B3/0472—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet with moving, e.g. rotating, outlet elements the spray jet actuating a movable deflector which is successively moved out of the jet by jet action and brought back into the jet by spring action
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G25/00—Watering gardens, fields, sports grounds or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
- B05B3/021—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements with means for regulating the jet relative to the horizontal angular position of the nozzle, e.g. for spraying non circular areas by changing the elevation of the nozzle or by varying the nozzle flow-rate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/60—Arrangements for mounting, supporting or holding spraying apparatus
- B05B15/62—Arrangements for supporting spraying apparatus, e.g. suction cups
- B05B15/622—Arrangements for supporting spraying apparatus, e.g. suction cups ground-penetrating
Landscapes
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Nozzles (AREA)
- Catching Or Destruction (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
In order to overcome the problems of the prior art, a new and improved water distributing apparatus, the present invention, is provided. The water distributing device comprises a nozzle; means to deliver water to the nozzle; a camming surface concentrically disposed about the axis of rotation of said nozzle: a support surface extending from said nozzle disposed proximate said concentric cam surface; a cam setting means supported by said support means and contacting said camming surface to vary the height of said camming surface; and a cam follower means contacting at one end to said cam surface and at the other end to said spray nozzle to vary the spray pattern emitting from the nozzle in accordance with the relative height set of the camming surface from the support means. Valve means responsive to said cam setting vary the quantity of water dispersed in relation to the pattern set by the camming surface. When applied to an oscillating type water-sprinkler, the cam follower means is disposed on the splash plate and rotates around the camming surface the splash plate will move in accordance with the shape of the camming surface that has been preset by means of the cam setting means, thereby providing a definite pattern for the liquid which is dispersed. Means are provided to specifically mount the base of the water distributing device attitude in a fixed attitude so that it can be removed and replaced and still maintain the same exact location so that the previously set camming determined spray pattern will still be applicable to the repositioned or to the remounted sprinkler or water distributing apparatus. Valve means are provided in the passageway to the nozzle which are actuated in relation to the positioning of the camming surface to reduce the flow of water when the range of the water stream is reduced. In rotary type sprinklers, the cam follower extends from the sprinkler arms to contact the camming surface as the arms rotate.
In order to overcome the problems of the prior art, a new and improved water distributing apparatus, the present invention, is provided. The water distributing device comprises a nozzle; means to deliver water to the nozzle; a camming surface concentrically disposed about the axis of rotation of said nozzle: a support surface extending from said nozzle disposed proximate said concentric cam surface; a cam setting means supported by said support means and contacting said camming surface to vary the height of said camming surface; and a cam follower means contacting at one end to said cam surface and at the other end to said spray nozzle to vary the spray pattern emitting from the nozzle in accordance with the relative height set of the camming surface from the support means. Valve means responsive to said cam setting vary the quantity of water dispersed in relation to the pattern set by the camming surface. When applied to an oscillating type water-sprinkler, the cam follower means is disposed on the splash plate and rotates around the camming surface the splash plate will move in accordance with the shape of the camming surface that has been preset by means of the cam setting means, thereby providing a definite pattern for the liquid which is dispersed. Means are provided to specifically mount the base of the water distributing device attitude in a fixed attitude so that it can be removed and replaced and still maintain the same exact location so that the previously set camming determined spray pattern will still be applicable to the repositioned or to the remounted sprinkler or water distributing apparatus. Valve means are provided in the passageway to the nozzle which are actuated in relation to the positioning of the camming surface to reduce the flow of water when the range of the water stream is reduced. In rotary type sprinklers, the cam follower extends from the sprinkler arms to contact the camming surface as the arms rotate.
Description
~301215 This invention relates to water dispersing devices and more particularly to lawn watering or sprinkling devices.
It has long been a problem in the use of lawn sprinklers to provide a pattern which will place the water where it is needed and only where it is needed. Almost all of the most effective lawn sprinklers or water dispersing or distributing apparatus operate on some sort of a rotating head principle, either the head oscillates under the force of an impulse sprinkler or the head merely rotates under the reaction of the exhaust of the water being dispelled. Because the distributing apparatus produce circular patterns and since most property boundaries are not circular, there are usually situations where it is ~3012~5 necessary to spray large quantities of water into areas where such spray is not desired in order to cover the desired areas with water. The alternative is to spray less than all of the desired areas and to use soaking strips or other means to water the areas which cannot be sprayed easily.
This problem has existed for a long time and has perplexed horticulturists, homeowners and others interested in lawn maintenance. Many attempts have been made in the past to provide some sort of apparatus which could alter the dispersal of water from this circular arc perimeter pattern.
Several examples of these attempts are shown in the following U.S. patents:
1,593,918 to Stanton;
It has long been a problem in the use of lawn sprinklers to provide a pattern which will place the water where it is needed and only where it is needed. Almost all of the most effective lawn sprinklers or water dispersing or distributing apparatus operate on some sort of a rotating head principle, either the head oscillates under the force of an impulse sprinkler or the head merely rotates under the reaction of the exhaust of the water being dispelled. Because the distributing apparatus produce circular patterns and since most property boundaries are not circular, there are usually situations where it is ~3012~5 necessary to spray large quantities of water into areas where such spray is not desired in order to cover the desired areas with water. The alternative is to spray less than all of the desired areas and to use soaking strips or other means to water the areas which cannot be sprayed easily.
This problem has existed for a long time and has perplexed horticulturists, homeowners and others interested in lawn maintenance. Many attempts have been made in the past to provide some sort of apparatus which could alter the dispersal of water from this circular arc perimeter pattern.
Several examples of these attempts are shown in the following U.S. patents:
1,593,918 to Stanton;
2,421,551 to Dunham;
2,565,926 to Manning;
2,582,158 to Porter;
2,962,220 to Woods;
2,999,645 to Kennedy;
2,565,926 to Manning;
2,582,158 to Porter;
2,962,220 to Woods;
2,999,645 to Kennedy;
3,033,469 to Green;
3,070,314 to Warren;
3,070,315 to Landry;
3,081,039 to Kennedy;
3,082,958 to Thomas;
3,204,874 to Senninger;
3,606,163 to Lewis; and 4,277,029 to Rabitsch.
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~3(~12~5 Some of the sprinklers described in the aforementioned U.S. Patents have camming surfaces which enable the sprinkler to produce square, rectangular or odd shaped sprinkling areas ~see for example Stanton, Manning, and Porter). However, none of these references describe camming surfaces which are easily adjustable to provide for variation of the angle of spray to thereby produce the square, rectangular or odd shaped sprinkling areas. Additionally, none of these references describe a valving means which functions with the angle of the spray to decrease or increase the flow through the nozzle to further provide for adjustment of the area sprayed.
In order to overcome the problems of the prior art, a new and improved water distributing apparatus, the present invention, is provided. The water distributing device comprises a nozzle; means to deliver water to the nozzle; a camming surface concentrically disposed about the axis of rotation of said nozzle; a support surface extending from said nozzle disposed proximate said concentric cam surface; a cam setting means supported by said support means and contacting said camming surface to vary the height of said camming surface; and a cam follower means contacting at one end to said cam surface and at the other end to said spray nozzle to vary the spray pattern emitting from the nozzle in accordance with the relative height set of the camming surface from the support means. Valve means responsive to said cam setting vary the quantity of water dispersed in relation to the pattern set by the camming surface.
~30~Z15 When applied to an oscillating type water-sprinkler, the cam follower means is disposed on the splash plate and rotates around the camming surface the splash plate will move in accordance with the shape of the camming surface that has been preset by means of the cam setting means, thereby providing a definite pattern for the liquid which is dispersed.
Means are provided to specifically mount the base of the water distributing device attitude in a fixed attitude so that it can be removed and replaced and still maintain the same exact location so that the previously set camming determined spray pattern will still be applicable to the repositioned or to the remounted sprinkler or water distributing apparatus.
Valve means are provided in the passageway to the nozzle which are actuated in relation to the positioning of the camming surface to reduce the flow of water when the range of the water stream is reduced.
~30~21S
In rotary type sprinklers, the cam follower extends from the sprinkler arms to contact the camming surface as the arms rotate.
l;~OlZ~S
Accordingly~ the present invention provides a water distributing device which can produce a varied spraying or dispersal pattern of water.
The present invention also provides a water dispersing device which can produce an easily varied spray pattern.
The present invention again provides a water dispersing device which can produce a widely varied spray pattern.
The present invention further provides a water dispersing device which can produce an easily set spray pattern.
The present invention also provides a water dispersing device which can produce an accurately determined spray pattern.
The present invention further provides a water dispersing device which can produce a pattern encompassing a full 360 or any portion.
The present invention again provides a water dispersing device which is relatively inexpensive to manufacture.
The present invention further provides a water dispersing device which is durable.
The present invention also provldes a water dispersing device which is reliable.
The present invention again provides a water dispersing device which can be easily maintained.
The present invention also provides a water dispersing device which does not require extensive ad~ustment.
. ~
~3012~5 The present invention further provides a water dispersing device which does not require complicated mechanlsms.
The present invention also provides a water dispersing device which can be adapted to be retrofitted onto existing sprinklers.
The present invention again provides a water dispersing device which can be aligned and realigned without difficulty.
The present invention also provides a water dispersing device which can always be positioned in the same position to produce spray dispersal or to produce the same pattern of dispersion.
The present invention further provides a water dispersing device which can be quickly ad~usted.
The present invention again provides a water dispersing device which does not require any special tools to ad~ust.
The present invention also provides a water dispersing device which will not go out of ad~ustment easily.
25The present invention again provides a water dispersing device which is made from standard materials.
The present invention also provides a water dispersing device which does not requlre any special housings and is always visible for maintenance.
The present invention further provides a water dispersing device which can be used with high or low speed and/or pressure rotary devices and still produce an appropriate spray pattern.
,. .
~30~2~S
The present invention also provides a water dispersing device which can vary the pattern of a continuously rotating dispersing arm.
The present invention further provides a sprinkler which can produce a predetermined, precise pattern of dispersal which can compensate for variations in pressure of the water supply to the sprinkler.
The present invention also provides a water dispersal device which can provide patterns of dispers~on which will include independent spray patterns on multiple arms.
The present invention provides a water dispersal apparatus having plurality of arms with the flow pattern for each arm capable of being set independently.
The present invention again provides a water dispersal device which provides for positive engagement between the control mechanism and the control setting device.
The present invention further provides a water dispersal device which varies the quantity of water in relation to the range of the water stream.
The present invention also provides water a dispersal device which incorporates valving means responslve to an ad-~ustable dispersion pattern to ad~ust the flow rate in relation to the dispersion pattern.
According to the present invention there is provided a water dlstributing device comprising resilient camming means;
support means; means to ad~ust the height of the camming means relative to the support means; a spray head mounted for rotatable movement relative to the camming and support means; a nozzle on the spray head; a splash plate mounted on the spray head and ~301215 extending over the nozzle of the spray head; and cam follower means on the end of said splash plate extending downwardly toward and being directly contactable with the camming means to thereby vary the angle of the splash plate with respect to the long central axis of the nozzle as the spray head rotates in accor-dance with the helght of the camming means. Suitably the spray head 1s rotated by impulse means activated by a stream of water discharging from the nozzle. Desirably the means to ad~ust the height of the camming means relatlve to the support means comprise a plurality of screw means threaded into said support means and contacting said camming means to prevent said camming means from deforming under contact wlth said cam follower means.
Suitably the device further comprises means for biasing the cam follower means of the splash plate into contact with the camming means.
The present invention will be further illustrated by way of the accompanying drawings in which:-130~Z~5 Figure 1 is a perspective view showing a sprinkler witha controlled dispersing pattern, said sprinkler being built in accordance with the teachings of the present invention.
Figure lA is a partial enlarged view showing the cam following surface on the end of the spray control arm or splash plate and showing the control means for varying the flow in relation to the water pressure.
Figure 2 is a side elevation of the sprinkler shown in Figure 1.
Figure 3 is a view of the covering head member of the sprinkler shown in Figure 1.
Figure 4 is a partial view showing the water entry system, in particular, the valve system for the rotating head of the sprinkler.
Figure 5 shows a typical water dispersal pattern which can be accomplished by means of the dispersing device built in akcordance with the teachings of this invention.
Figure 6 shows the typical line of flow of a standard water dispersing device.
Figure 7 shows the different patterns of flow that are available by the water dispersing device built in accordance with the teachings of the present invention.
Figure 8 is an enlarged partial view showing another embodiment of the camming surface for controlling the position of the splash plate of the water dispersing device.
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~3012i5 Figure 9 is a partial elevational view taken along lines 9-9 of Figure 8.
Figure lOA shows another er~odiment of the means for positioning the camming surface used in this invention.
Figure lOB is a view taken along line lOB-B of Figure lOA.
Figure llA shows still another ernbodiment of the means for positioning the camming surface used in this invention.
Figure llB is a partial side elevation taken along line llB-B of Figure llA.
Figure 12A is an exploded view showing a mounting device used for mounting a sprinkler head built in accordance with the teachings of the present invention so that the dispersal pattern is always the same when the sprinkler is used.
Figure 12B is a side elevation of the sprinkler head mounting device shown in Figure 12A.
Figure 12C is a view taken along line 12C-C of Figure 12B, showing the cross section of the mounting and aligning device.
Figure 13A and Figure 13AA are other embodiments of the water dispersing device built in accordance with the present invention.
Figure 13B and Figure 13BB are views taken along lines 13B-B and 13BB-BB of Figure 13A and Figure 13AA, ~L30~2~5 respectively.
Figure 13C and Figure 13CC are partial elevational views taken along lines 13C-C and 13CC-CC of Figure 13B and Figure 13BB, respectively.
S Figure 14 shows a spray pattern having a wedge shaped portion in which there is no spray provided~
Figure 15 shows a quadrant of a spray pattern with the various patterns produced by a multi-armed sprinkler.
Figure 1~ shows a rectangular plot showing the variations in the spray pattern that can be accomplished by a multi-armed sprinkler.
Figure 17 is a perspective view of another embodiment of the sprinkler of this invention.
Figure 18 is a side elevation of the sprinkler shown in Figure 17.
Figure 19 is a cross-sectional view of the valve-means taken along line 19-19 in Figure 18.
Figure 20 is a break-a-way perspective view of the control means and valve means used in the embodiment in Figure 17 to restrict the flow of liquid to the nozzle in relation to the angular position of the nozzle.
Referring to Fig. 1 of the drawings, we show a water dispersing apparatus generally indicated as 20, having a main pipe 22 which carries water up to a dispensing head generally indicated as 24. As shown in Fig. 2, water can also enter ~30i21~
the main pipe 22 through a "T" or a right angle fitting shown as 26. As shown in Figs. 1 and 2, the entire assembly is screwed down onto the top of threaded mounting pipe 28 by means of a threaded collar 30. Water from mounting pipe 28 will pass through the end of the collar 30 into the lower portion of the assembly, and then pass up through a swivel joint 32, (that is well known in the art) into sprinkling device to the dispensing nozzle 34. The dispensing nozzle 34 is controlled by means of an impulse feeder 36, which is actuated by the water stream leaving the dispensing nozzle 34, and which will push the head or the dispensing no~zle 34 around on the swivel joint 32 until the bottom of the dispensing nozzle 37 engages the stop guides 38 in the standard manner used in such impulse type sprinkler means.
The splash plate, generally indicated as 40, mounted on the top of the dispensing head 24 is more clearly shown in Fig. 3. The mounting of the splash plate 40 has a splash end 44 that is depressed and adapted to deflect the stream of water leaving the dispensing nozzle 34. The top of the plate 40 is pivotedly mounted to a fixed housing 50 by means of a pivot pin 42 and spring means 46 fitting inside a boss 48 in the underside of the splash plate 40 and extending to the top of the fixed housing 50. The fixed housing 50 itself is resiliently fixed to the back of the delivery pipe 52 and nozzle end 34. Referring to Figs. 1 and 2, the back 54 of the splash plate 40 extends downward and rests against a cam surface 56 made of a flexible material which is positioned around the inlet nozzle 34 ad~acent or proximate to a fixed and rigid support member 58. A plurality of thumb set screws 60 are positioned around the support member 58 and are threadably engaged therewith. By threading these set screws 60 or cam setting means, inwardly or upwardly, the height of 130~15 the camming surface 56 will be adjusted and this, in turn, will cause the splash end 44 of the splash plate 40 to be lowered; and therefore, cause a greater deflection of the water leaving the nozzle 34; and thereby reducing the range.
As shown in Fig. 4, the bearing rod 80 that the splasn plate is mounted upon is connected with a dispensing head 24 and will oscillate in a vertical direction in relation to the position of this splash plate 40. When the splash plate 40 is forced downward by means of the cam follower arm, the bearing 80 will therefore be lowered into the triangular passage to restrict the flow of liquid coming up from the delivery pipe 22 into the dispensing head. As shown, the bearing rod 80 is sealingly mounted in the dispensing head by means of "0" ring 84. It rides in a shaft in the dispensing head having a bottom 82. The passageway to the discharge nozzle in the dispensing head is triangularly shaped so that when the bearing rod 80 extends downward, it will bloc~ the top of the triangular section and this area of blockage will increase as the bearing member is forced progressively downward.
As shown in Figs. 1 and lA the bottom of the back of the splash plate 54 or the control arm 64 has a cam following section 66 having a surface offset relative to the perpendicular of the axis of the arm 64. This cam following surface 66 is relatively wide, having a large flat area with rounded ends. The advantages of such a configuration are that the camming surface 56, being of a relatively flexible material, will tend to be flattened toward the horizontal by a large flat surface of cam following surface 66.
Additionally, the wider the flat area of the cam following surface 66, the larger will be the permitted angle of radial ~3012~5 movement of the control arm 64 which can be accommodated with the camming surface 56 still covering the circular track which runs directly over the ends of the cam setting screws 60.
As shown in Fig. lA, the control arm 64 can be made of two separate pieces 70, 72 having a telescoping relationship to each other. The outer piece 70 is hollow and has a hole therein which is adapted to receive a thumbscrew and wing nut arrangement 74 passing thersthrough. This enables the inner piece or lower end 72, which is ~lotted (not shown) to slidably fit within the outer piece 70. This arrangement permits the control arm 64 to be lengthened or shortened by loosening the wing nut 74 and retightening it after the appropriate positioning of the lower end 72.
The ability to adjust the length of the control arm 64 enables the length of the arm to compensate for variations in water pressure provided to the inlet or main pipe 22.
Therefore, for a given setting of the various cam setting members 60, the control arm 64 can be lengthened or shortened to, in effect change the angle of deflection of the splash end 44 that deflects the stream 76. (Figs. 1 and 2) Figures 2, 3 and 4 show the details of the valving system used to modulate the flow of water to the nozzle 34 of the sprinkler. The pivotable splash plate 40, which has the control arm 64 ending in the cam follower section 66 which contacts the camming surface 56, pivots abou¦ point 78, in accordance with the setting of the camming surface 56, which in turn will adjust the arm 64. As the arm 64 pivots in accordance with the position of the camming surface 56, it will force the locating pin 43 downward against the top of ~0121S
the shaft 80 as shown in Figure 3.
Referring to Figure 4, the bottom of shaft 80 fits into a shoulder 84 in the passage 82 for water and intersects the pathway of the water flow path from the inlet pipe 22 tothe nozzle 34 of the sprinkler. The shoulder 84 contains an o-ring and a bushing 86 which is used to mount and guide the shaft 80 as it moves up and down in the pas{iom. When the shaft 80 is in the full down position, it will substantially shut off the flow path of the water from the inlet 22 to the nozzle 34. When the shaft 80 is in the raised position it will leave the passage relatively unobstructed. The shaft 80 thus moves up and down in relation to the position of the splash plate 40, which in turn is positioned by the cam follower end 66 of the extending and descending control arm 64 of the splash plate 40, which in turn will position the splash end 44.
An adjustment on the position of the valving shaft 80, for a given relationship of the arm 64 is accomplished by adjustment of the locating pin 43. This pin 43 is threadably connected to the top of the splash plate 40 and bears against the top of the valving shaft 80. A spring 88, positioned between the head 90 of the valving shaft 80 and the top of the fixed nozzle housing 50, tends to urge the valving shaft 80 to the uppermost position. The splash plate 40 is urged to the uppermost position, as mentioned previously, by means of spring means 46 which bears against the top of the nozzle housing 50 and the bottom of the splash plate 40 and fits into the receiving boss 48.
Threading the locating pin 43 down towards the valving shaft 80 will permanently depress the valving shaft 80 for purposes of restricting the flow of water to the nozzle of ,rll~
. a_ ~301215 the sprinkler.
Figures 17 through 20 are another embodiment of the sprinkler of this invention differing from the embodiment shown in Figures 1 through 4 in the different control means and valve means used to restrict the flow of liquid to the nozzle in relation to the angular position of the nozzle. In Figures 17-20, where applicable, the elements are specified in the same manner as in Figures 1-4 and have the same function.
Referring to Fig. 17 the water dispersing apparatus 20, has a main pipe 22 which carries water up to the dispensing head 24. As shown in Fig. 18, water can also enter the main pipe 22 through the "T" or the right angle fitting 26. The entire assembly is screwed down onto the top of threaded mounting pipe 28 by means of a threaded collar 30. Water from mounting pipe 28 will pass through the end of the collar 30 into the lower portion of the assembly, and then pass up through a swivel joint 32, into sprinkling device to the dispensing nozzle 34. The dispensing nozzle 34 is controlled by means of an impulse feeder 36, actuated by the water stream leaving dispensing nozzle 34, to push the dispensing nozzle 34 around the joint 32 until the bottom of the nozzle 37 engages the stop guides 38.
The splash plate 40 is mounted on the top of the dispensing head 24. The splash plate 40 has a splash end 44 that is depressed and adapted to deflect the stream of water leaving the dispensing nozzle 34. The top of the plate 40 is pivotedly mounted to a fixed housing S0 by means of a pivot pin 42 and spring means 46 fitting inside a boss 48 in the underside of the splash plate 40 and extending to the top of the fixed housing 50. The back 54 of the splash plate 40 ~301215 extends downward and rests against the cam surface 56 which is positioned around the inlet nozzle 34 adjacent or proximate to a fixed and rigid support member 58. The plurality of thumb set screws 60 positioned around the support member 58 are threadably engaged therewith.
Threading the set screws 60 inwardly or upwardly, adjust the height of the camming surface 56 causing the splash end 44 of the splash plate 40 to be lowered causing a greater deflection of the water leaving the nozzle 34; and thereby reducing the range.
The bottom of the back of the splash plate 54 or the control arm 64 has a cam following section 66 having a surface offset relative to the perpendicular of the axis of the arm 64.
The control arm 64 is made of two separate pieces 70, 72 having a telescoping relationship to each other, alternatively, a fitting such as a push rod-type turn-buckle.
The outer piece 70 is hollow and has a hole therein which is adapted to receive a thumbscrew and wing nut arrangement 74 passing therethrough. This enables the inner piece or lower end 72, which is slotted (not shown) to slidably fit within the outer piece 70. This arrangement permits the control arm 64 to be lengthened or shortened by loosening the wing nut 74 and retightening it after the appropriate positioning of the end piece 72.
Figures 19 and 20, in particular, show the details of the control means and valve means used in this embodiment to restrict the flow of liquid to the nozzle in relation to setting of the camming surface and in the angular position of the nozzle. A butterfly valve 166 is provided in the inlet pipe 52 to the nozzle 34. As shown in Figures 19 and 20, the butterfly valve has a crank arm 168 extending from the mounting axle 170 of the valve 166. The mounting axle 170 or pivot member supports the valve body 166 within the inlet nozzle 52. The crank arm 168 is connected to the cam follower 66 by connecting rods 172 and 174 which are adjustably connected to each other through slots 176 and 178 by screw 180 and nut 1~2. This adjustment means permits this inlet throttle valve 166 to be adjusted in relation to the cam follower arm 66.
Thus the valve will throt~le the amount of water that will reach the nozzle 34 in relation to the setting of the camming surface 56. The valve 166 will restrict the amount of water that reaches the nozzle 34 where the camming pattern is set to restrict the flow from the nozzle 34 to a shorter distance. Similarly, where it is desired to have maximum range on the sprinkler, the crank arm 168 and rods 176 and 178 will set the butterfly valve 166 in the maximum open position to provide a minimum restriction to the flow which will be reaching the nozzle 34.
In Fig. 5, a typical spray pattern, which can be accomplished by the described device is shown. By greater deflection downward of the splash plate 40 at radial positions 4 to 5 o'clock (D) and 7 to 8 o'clock (F) as shown in Fig. 5. Similarly, in the 6 o'clock position (E) where there is almost no deflection by the splash plate 40, as well as in the 11 and 1 o'clock positions, (A and C), the range will be longer and, therefore, the water will have a further reach.
Figs. 6 and 7, show the effect of the deflection of the water as seen from the side. It is clear that only a ~30121S
relatively small vertical deflection of the control arm 64 of the splash plate 40 will be sufficient to pivot the plate 40 sufficiently to greatly increase or decrease the range of the stream 76 that is exiting from the nozzle 34.
S Fig. 7 shows the effect on the spray flow 76 of adjustments in the locating pin 43 to raise or lower the valving shaft 80 within the sprinkler head. By lowering the locating pin 43 and, therefore, lowering the valving shaft 80 into the flow path to the nozzle 34, a weaker flow is obtained for a given angle than would be the case if the valving shaft 80 were raised higher.
In Figs. 8 and 9 another embodiment of the camming means is shown, in which the camming surface 150 is threadably and, therefore, positively engaged to the cam setting means, in this case by means of thumb screws 152 threadably engaged to the support plate 154 as in the previous embodiment.
However, a washer 96 is threadably positioned below the flexible cam surface 150. The cam follower end 156 of the splash plate is modified to include a specific cam follower member 98 which is fitted into a hoo~ed portion 100 at the end of the cam follower end 156 so that cam surface 150 forces, are downward instead of being upward forces in the embodiment in Figs. 1 and 2. Thus, between the cam surface 150 and the cam follower 156, the cam surface 150 exerts a downward force to extend the range and tilt the splash head upwaxd to allow the maximum range. In effect, this is a more positive type of camming in that there is always engagement between the cam surface 150 and the cam follower 156 as the head rotates around the camming surface 150.
Fig. 10 shows another embodiment by which the cam surface 150 can be adjusted. In this case, the support plate 160 has an annular shoulder 102 and the thumb screw 104 having a tapered point 102 is threadably engaged in the horizontal position. Extending the thumb screw 104 inward will tend to raise up the cam surface 158. Withdrawal of the thumb screw 104 will allow the cam plate or surface 158 to retract or lower.
Fig. 11 shows yet another modification of the cam setting means, somewhat similar to that shown in Fig. 10, but in which an eccentric lobe 106 is fitted onto the end of the thumb screw 108 to augment the displacement of the cam plate 164 by rotation of the screw 108. The device, shown in Fig.
11, is extremely advantageous in that it allows for a very quick and rapid setting and a very sensitive setting of the camming plate 164.
After much time has been spent in positioning the sprinkler and setting the full pattern, as has often been the problem in the past, this effort is all wasted once the sprinkler is removed as is often the case when the lawn is mowed. In order to overcome this situation a special receptor member, shown in Fig. 12 as 110, is provided which has a Y-shaped cross section or any easily positioned shape, whether it be square, oval, Y-shaped, etc. Preferably it has extending arms 112 so that once positioned into the earth, it will not be able to rotate or will not rotate under the force of the rotating forces that act on the sprinkler. The sprinkler is provided with a standard mounting spike 114 connected to the sprinkling device in the standard manner and which has a cross section which mates with the mounting ~30121S
member receptacle 116 that is placed into the ground.
Therefore, by positioning the sprinkler mounting spike in the mounting receptacle 116. Thus the same initial orientation of the camming surface with the area to be watered can always S be maintained so ~hat the setting of the sprinkler will always remain constant.
In Figs. 13A, B and C, and Figs. 13AA, BB and CC, yet other embodiments of the invention are shown, in which a water turbine type head is used to dispense water from one or more continuously rotating dispensing arms. Referring to all of these Figures, the base 120 has water inlet 122 which then passes up through a central column 124 and passes into dispensing arms 118. Each dispensing arm 118 has an eccentrically positioned cam following surface 126. The eccentrically positioned cam follower surface 126, extends outward from each arm 118 and contacts the camming surface 128 which is mounted around the central column 124. The surface 128 is positioned by means of the cam positioning means or thumb screws 130 threadably mounted into the support plate 132 in a manner as has been previously described. The type of rotary sprinkler here tends to operate at relatively high speeds, though the apparatus can operate at low speed and low pressure with equally good results, and the eccentric cam following surface 126 attached to each arm will tend to follow the setting of the camming surface 128. By following the setting of the camming surface 128, the spraying arms 118 which extend from the central rotating housing are raised or lowered.
As shown in Figs. 13B and 13BB, water passes to the inlet of the dispensing arm 118 from the central column 124, 130~2~5 through mating holes 134 and 136 in the inlet and housing, and into the end of the arm 118.
Fig. 13A shows a preferred method of connecting the rotating sprinkler arm 118 with the camming surface 128. The connecting means consis~s of two arms 134, 136, one of which 134, is rigidly connected to the sprinkler spray arm 118, and the other 136, is pivotably connected to the fixed arm 134 and descends downward to ride on the top of the camming surface or underneath the camming surface 128 in the manner shown in Figs. 8 and 9 herein. A spring means 137 is connected, between the descending articulated arm 136 and the fixed arm 134 connected to the sprinkler arm 118. The spring means keeps the fixed arm 131 in proper position for the cam follower end 126 to contact the cam surface 128.
As nGted in Fig. 13A, the outside edge of the cam surface 128 contacts lower descending arm 136 and prevents the arm from moving substantially from the vertical.
Therefore, as the vertically disposed descending arm 134, 136 moves up and down with the variation in the setting of the camming surface 128. The spring means connecting the articulated vertical arm 136 will cause the arm 134 fixed to the spray arm 118 to rotate in relationship to the setting of the camming surface and therefore, moving the spray arm 118 up and down.
Optionally, as depicted in Figs. 13AA and BB, one of the articulated arms, i.e. 136 in Fig. 13A, may be dispensed with and the arm 134 prevented from moving vertically and maintained in contact with the camming surface 128 by spring means 184. The spring means 184 is connected to the bottom of arm 118 and to extending member 186 extending from the . . ~, ~
~3~12i5 central column 124. The sprin~ means 184 maintains the cam follower in contact with the camming surface 128 and yet permits the arm 118 to rise and fall with the camming action as it rotates.
A valving arrangement i5 also provided to proportionately reduce the amount of flow to the spray arm 118 whan in the lower position. This is shown in Fig. 13C.
A triangular passage 140 is provided in the receptacle 143 for the valve arm 118. Rotation of the rectangular passage 145 in the valve arm 118, in relation the triangular passage 140, will tend to reduce the cross-sectional area of the passage for flow and thereby effectively reduce water flow.
As shown in Figs. 13AA and 13BB, arm 118 can be maintained in a fixed position, to thereby assure a constant cross-sectional area for liquid flow by a lock-nut 188 threadably engaging arm 118 and abutting central column 124. When it is desired to secure the arm, lock-nut 118 is threaded toward the central column 124 until it abuts the column 124 to thereby lock the arm 118 in position.
Additionally, as shown in Fig. 13B, each of the arms 118 connected to the central rotating column 124 has two elements connected by a coupling means 144. The outer portion of the arm 142 is fixedly positioned in the coupling means 144 by means of a set screw 146, extending through the coupling 144 to hold the angle of the arm 142 fixed in relation to the coupling 144. Similarly, the coupling itself 144 is held fixed, with relation to the angle of the inner arm 149, by means of a second set screw 148 in the coupling 144.
Therefore, the initial setting of the valving setting, produced by the relationship between the rotary position of the arm 118 and the valve port 140 in the receptacle 143, can 130~Z15 be established and still retain the appropriate angular relationship between the nozzle ~nd of the arm 118 and the housing. The rotary position of the housing is controlled by means of the descending control arm 134 as mentioned previously.
It should also be pointed out that the length of arm 134 from the coupling 144 can be controlled and adjusted by means of a thumb and set screw arrangement 141 somewhat similar to that for the arm 64 shown in Fig. lA, where the thumbscrew arrangement can be used to adjust the length of the arm. It should be pointed out that if more than one arm is used, the length of the control arm could be adjusted for each arm so that the angle of the arms could be adjusted with each setting. Therefore you could have in effect, a series of concentric patterns in the manner shown in Figure 15.
Similarly, one arm 118 of the many could be completely removed from the system so as to give a purely circular pattern by merely removing the arms 134, 136 from the camming surface 126. Therefore, it would even be possible to have a situation where one arm could be providing a rectangular or a square pattern while the other arm could be providing a completely circular pattern.
The cutout and rectangular patterns in Figs. 14 and 16 could be obtained by the appropriate setting of the outer arm 142 in relation to the inner arm 149, and setting the inner arm 149 in relation to the valving system 140, 145 so that at a given setting of the camming surface 126, water from the central housing 124 would be completely occluded by means of the valving arrangement between the inner arm 149 and the rotary central housing 124.
Several points should be noted from the previous.
130~2~5 First, the present invention uses many pre~iously known parts in combination with a unique and novel means for positioning the splash plate to adjust the range of the spray from the sprinkler. No elaborate parts are necessary, no delicate machinery is required. The items that are used can be made from standard, relatively available, equipment. Since the item is relatively simple it does not require complicated setting procedures nor is it overly sensitive once properly adjusted. The flexible camming material can be made from any one of a large number of materials presently available which will be durable and still be flexible enough to provide the necessary support. It should also be noted that no special housings are required to enclose the adjusting item and therefore, the item is relatively simple to manufacture and therefore, relatively cheap to manufacture.
Further, the mounting means for accurately mounting and positioning the apparatus insures that once the apparatus has been adjusted for the appropriate spray pattern that it need not be readjusted. It can be removed with ease in order to provide an unobstructed surface in the lawn for the normal mowing that will be required from the abundant grass growth produced by the effective watering of the invention.
As can be seen and is readily apparent, a wide variety of spray patterns can be obtained using this invention and this will greatly enhance the ability to accurately display or dispense water in preselected patterns.
It should be pointed out that while this is shown as a pipe mounted device, or an externally mounted device, or a device intended for use above ground, this system is easily adaptable to "underground sprinklers" which are, in effect, sprinkler heads mounted very low to the surface of the 13~12~LS
ground. All that is necessary is that the splash plate and camming plate be capable of adjustment above the level of the support plate. An inordinate amount of clearance need not be provided as can be seen from the embodiment shown in Figs. 10 and 11.
3,070,314 to Warren;
3,070,315 to Landry;
3,081,039 to Kennedy;
3,082,958 to Thomas;
3,204,874 to Senninger;
3,606,163 to Lewis; and 4,277,029 to Rabitsch.
~r ~
.'t ~
~3(~12~5 Some of the sprinklers described in the aforementioned U.S. Patents have camming surfaces which enable the sprinkler to produce square, rectangular or odd shaped sprinkling areas ~see for example Stanton, Manning, and Porter). However, none of these references describe camming surfaces which are easily adjustable to provide for variation of the angle of spray to thereby produce the square, rectangular or odd shaped sprinkling areas. Additionally, none of these references describe a valving means which functions with the angle of the spray to decrease or increase the flow through the nozzle to further provide for adjustment of the area sprayed.
In order to overcome the problems of the prior art, a new and improved water distributing apparatus, the present invention, is provided. The water distributing device comprises a nozzle; means to deliver water to the nozzle; a camming surface concentrically disposed about the axis of rotation of said nozzle; a support surface extending from said nozzle disposed proximate said concentric cam surface; a cam setting means supported by said support means and contacting said camming surface to vary the height of said camming surface; and a cam follower means contacting at one end to said cam surface and at the other end to said spray nozzle to vary the spray pattern emitting from the nozzle in accordance with the relative height set of the camming surface from the support means. Valve means responsive to said cam setting vary the quantity of water dispersed in relation to the pattern set by the camming surface.
~30~Z15 When applied to an oscillating type water-sprinkler, the cam follower means is disposed on the splash plate and rotates around the camming surface the splash plate will move in accordance with the shape of the camming surface that has been preset by means of the cam setting means, thereby providing a definite pattern for the liquid which is dispersed.
Means are provided to specifically mount the base of the water distributing device attitude in a fixed attitude so that it can be removed and replaced and still maintain the same exact location so that the previously set camming determined spray pattern will still be applicable to the repositioned or to the remounted sprinkler or water distributing apparatus.
Valve means are provided in the passageway to the nozzle which are actuated in relation to the positioning of the camming surface to reduce the flow of water when the range of the water stream is reduced.
~30~21S
In rotary type sprinklers, the cam follower extends from the sprinkler arms to contact the camming surface as the arms rotate.
l;~OlZ~S
Accordingly~ the present invention provides a water distributing device which can produce a varied spraying or dispersal pattern of water.
The present invention also provides a water dispersing device which can produce an easily varied spray pattern.
The present invention again provides a water dispersing device which can produce a widely varied spray pattern.
The present invention further provides a water dispersing device which can produce an easily set spray pattern.
The present invention also provides a water dispersing device which can produce an accurately determined spray pattern.
The present invention further provides a water dispersing device which can produce a pattern encompassing a full 360 or any portion.
The present invention again provides a water dispersing device which is relatively inexpensive to manufacture.
The present invention further provides a water dispersing device which is durable.
The present invention also provldes a water dispersing device which is reliable.
The present invention again provides a water dispersing device which can be easily maintained.
The present invention also provides a water dispersing device which does not require extensive ad~ustment.
. ~
~3012~5 The present invention further provides a water dispersing device which does not require complicated mechanlsms.
The present invention also provides a water dispersing device which can be adapted to be retrofitted onto existing sprinklers.
The present invention again provides a water dispersing device which can be aligned and realigned without difficulty.
The present invention also provides a water dispersing device which can always be positioned in the same position to produce spray dispersal or to produce the same pattern of dispersion.
The present invention further provides a water dispersing device which can be quickly ad~usted.
The present invention again provides a water dispersing device which does not require any special tools to ad~ust.
The present invention also provides a water dispersing device which will not go out of ad~ustment easily.
25The present invention again provides a water dispersing device which is made from standard materials.
The present invention also provides a water dispersing device which does not requlre any special housings and is always visible for maintenance.
The present invention further provides a water dispersing device which can be used with high or low speed and/or pressure rotary devices and still produce an appropriate spray pattern.
,. .
~30~2~S
The present invention also provides a water dispersing device which can vary the pattern of a continuously rotating dispersing arm.
The present invention further provides a sprinkler which can produce a predetermined, precise pattern of dispersal which can compensate for variations in pressure of the water supply to the sprinkler.
The present invention also provides a water dispersal device which can provide patterns of dispers~on which will include independent spray patterns on multiple arms.
The present invention provides a water dispersal apparatus having plurality of arms with the flow pattern for each arm capable of being set independently.
The present invention again provides a water dispersal device which provides for positive engagement between the control mechanism and the control setting device.
The present invention further provides a water dispersal device which varies the quantity of water in relation to the range of the water stream.
The present invention also provides water a dispersal device which incorporates valving means responslve to an ad-~ustable dispersion pattern to ad~ust the flow rate in relation to the dispersion pattern.
According to the present invention there is provided a water dlstributing device comprising resilient camming means;
support means; means to ad~ust the height of the camming means relative to the support means; a spray head mounted for rotatable movement relative to the camming and support means; a nozzle on the spray head; a splash plate mounted on the spray head and ~301215 extending over the nozzle of the spray head; and cam follower means on the end of said splash plate extending downwardly toward and being directly contactable with the camming means to thereby vary the angle of the splash plate with respect to the long central axis of the nozzle as the spray head rotates in accor-dance with the helght of the camming means. Suitably the spray head 1s rotated by impulse means activated by a stream of water discharging from the nozzle. Desirably the means to ad~ust the height of the camming means relatlve to the support means comprise a plurality of screw means threaded into said support means and contacting said camming means to prevent said camming means from deforming under contact wlth said cam follower means.
Suitably the device further comprises means for biasing the cam follower means of the splash plate into contact with the camming means.
The present invention will be further illustrated by way of the accompanying drawings in which:-130~Z~5 Figure 1 is a perspective view showing a sprinkler witha controlled dispersing pattern, said sprinkler being built in accordance with the teachings of the present invention.
Figure lA is a partial enlarged view showing the cam following surface on the end of the spray control arm or splash plate and showing the control means for varying the flow in relation to the water pressure.
Figure 2 is a side elevation of the sprinkler shown in Figure 1.
Figure 3 is a view of the covering head member of the sprinkler shown in Figure 1.
Figure 4 is a partial view showing the water entry system, in particular, the valve system for the rotating head of the sprinkler.
Figure 5 shows a typical water dispersal pattern which can be accomplished by means of the dispersing device built in akcordance with the teachings of this invention.
Figure 6 shows the typical line of flow of a standard water dispersing device.
Figure 7 shows the different patterns of flow that are available by the water dispersing device built in accordance with the teachings of the present invention.
Figure 8 is an enlarged partial view showing another embodiment of the camming surface for controlling the position of the splash plate of the water dispersing device.
~,,, ~,,, ~?'`~
~3012i5 Figure 9 is a partial elevational view taken along lines 9-9 of Figure 8.
Figure lOA shows another er~odiment of the means for positioning the camming surface used in this invention.
Figure lOB is a view taken along line lOB-B of Figure lOA.
Figure llA shows still another ernbodiment of the means for positioning the camming surface used in this invention.
Figure llB is a partial side elevation taken along line llB-B of Figure llA.
Figure 12A is an exploded view showing a mounting device used for mounting a sprinkler head built in accordance with the teachings of the present invention so that the dispersal pattern is always the same when the sprinkler is used.
Figure 12B is a side elevation of the sprinkler head mounting device shown in Figure 12A.
Figure 12C is a view taken along line 12C-C of Figure 12B, showing the cross section of the mounting and aligning device.
Figure 13A and Figure 13AA are other embodiments of the water dispersing device built in accordance with the present invention.
Figure 13B and Figure 13BB are views taken along lines 13B-B and 13BB-BB of Figure 13A and Figure 13AA, ~L30~2~5 respectively.
Figure 13C and Figure 13CC are partial elevational views taken along lines 13C-C and 13CC-CC of Figure 13B and Figure 13BB, respectively.
S Figure 14 shows a spray pattern having a wedge shaped portion in which there is no spray provided~
Figure 15 shows a quadrant of a spray pattern with the various patterns produced by a multi-armed sprinkler.
Figure 1~ shows a rectangular plot showing the variations in the spray pattern that can be accomplished by a multi-armed sprinkler.
Figure 17 is a perspective view of another embodiment of the sprinkler of this invention.
Figure 18 is a side elevation of the sprinkler shown in Figure 17.
Figure 19 is a cross-sectional view of the valve-means taken along line 19-19 in Figure 18.
Figure 20 is a break-a-way perspective view of the control means and valve means used in the embodiment in Figure 17 to restrict the flow of liquid to the nozzle in relation to the angular position of the nozzle.
Referring to Fig. 1 of the drawings, we show a water dispersing apparatus generally indicated as 20, having a main pipe 22 which carries water up to a dispensing head generally indicated as 24. As shown in Fig. 2, water can also enter ~30i21~
the main pipe 22 through a "T" or a right angle fitting shown as 26. As shown in Figs. 1 and 2, the entire assembly is screwed down onto the top of threaded mounting pipe 28 by means of a threaded collar 30. Water from mounting pipe 28 will pass through the end of the collar 30 into the lower portion of the assembly, and then pass up through a swivel joint 32, (that is well known in the art) into sprinkling device to the dispensing nozzle 34. The dispensing nozzle 34 is controlled by means of an impulse feeder 36, which is actuated by the water stream leaving the dispensing nozzle 34, and which will push the head or the dispensing no~zle 34 around on the swivel joint 32 until the bottom of the dispensing nozzle 37 engages the stop guides 38 in the standard manner used in such impulse type sprinkler means.
The splash plate, generally indicated as 40, mounted on the top of the dispensing head 24 is more clearly shown in Fig. 3. The mounting of the splash plate 40 has a splash end 44 that is depressed and adapted to deflect the stream of water leaving the dispensing nozzle 34. The top of the plate 40 is pivotedly mounted to a fixed housing 50 by means of a pivot pin 42 and spring means 46 fitting inside a boss 48 in the underside of the splash plate 40 and extending to the top of the fixed housing 50. The fixed housing 50 itself is resiliently fixed to the back of the delivery pipe 52 and nozzle end 34. Referring to Figs. 1 and 2, the back 54 of the splash plate 40 extends downward and rests against a cam surface 56 made of a flexible material which is positioned around the inlet nozzle 34 ad~acent or proximate to a fixed and rigid support member 58. A plurality of thumb set screws 60 are positioned around the support member 58 and are threadably engaged therewith. By threading these set screws 60 or cam setting means, inwardly or upwardly, the height of 130~15 the camming surface 56 will be adjusted and this, in turn, will cause the splash end 44 of the splash plate 40 to be lowered; and therefore, cause a greater deflection of the water leaving the nozzle 34; and thereby reducing the range.
As shown in Fig. 4, the bearing rod 80 that the splasn plate is mounted upon is connected with a dispensing head 24 and will oscillate in a vertical direction in relation to the position of this splash plate 40. When the splash plate 40 is forced downward by means of the cam follower arm, the bearing 80 will therefore be lowered into the triangular passage to restrict the flow of liquid coming up from the delivery pipe 22 into the dispensing head. As shown, the bearing rod 80 is sealingly mounted in the dispensing head by means of "0" ring 84. It rides in a shaft in the dispensing head having a bottom 82. The passageway to the discharge nozzle in the dispensing head is triangularly shaped so that when the bearing rod 80 extends downward, it will bloc~ the top of the triangular section and this area of blockage will increase as the bearing member is forced progressively downward.
As shown in Figs. 1 and lA the bottom of the back of the splash plate 54 or the control arm 64 has a cam following section 66 having a surface offset relative to the perpendicular of the axis of the arm 64. This cam following surface 66 is relatively wide, having a large flat area with rounded ends. The advantages of such a configuration are that the camming surface 56, being of a relatively flexible material, will tend to be flattened toward the horizontal by a large flat surface of cam following surface 66.
Additionally, the wider the flat area of the cam following surface 66, the larger will be the permitted angle of radial ~3012~5 movement of the control arm 64 which can be accommodated with the camming surface 56 still covering the circular track which runs directly over the ends of the cam setting screws 60.
As shown in Fig. lA, the control arm 64 can be made of two separate pieces 70, 72 having a telescoping relationship to each other. The outer piece 70 is hollow and has a hole therein which is adapted to receive a thumbscrew and wing nut arrangement 74 passing thersthrough. This enables the inner piece or lower end 72, which is ~lotted (not shown) to slidably fit within the outer piece 70. This arrangement permits the control arm 64 to be lengthened or shortened by loosening the wing nut 74 and retightening it after the appropriate positioning of the lower end 72.
The ability to adjust the length of the control arm 64 enables the length of the arm to compensate for variations in water pressure provided to the inlet or main pipe 22.
Therefore, for a given setting of the various cam setting members 60, the control arm 64 can be lengthened or shortened to, in effect change the angle of deflection of the splash end 44 that deflects the stream 76. (Figs. 1 and 2) Figures 2, 3 and 4 show the details of the valving system used to modulate the flow of water to the nozzle 34 of the sprinkler. The pivotable splash plate 40, which has the control arm 64 ending in the cam follower section 66 which contacts the camming surface 56, pivots abou¦ point 78, in accordance with the setting of the camming surface 56, which in turn will adjust the arm 64. As the arm 64 pivots in accordance with the position of the camming surface 56, it will force the locating pin 43 downward against the top of ~0121S
the shaft 80 as shown in Figure 3.
Referring to Figure 4, the bottom of shaft 80 fits into a shoulder 84 in the passage 82 for water and intersects the pathway of the water flow path from the inlet pipe 22 tothe nozzle 34 of the sprinkler. The shoulder 84 contains an o-ring and a bushing 86 which is used to mount and guide the shaft 80 as it moves up and down in the pas{iom. When the shaft 80 is in the full down position, it will substantially shut off the flow path of the water from the inlet 22 to the nozzle 34. When the shaft 80 is in the raised position it will leave the passage relatively unobstructed. The shaft 80 thus moves up and down in relation to the position of the splash plate 40, which in turn is positioned by the cam follower end 66 of the extending and descending control arm 64 of the splash plate 40, which in turn will position the splash end 44.
An adjustment on the position of the valving shaft 80, for a given relationship of the arm 64 is accomplished by adjustment of the locating pin 43. This pin 43 is threadably connected to the top of the splash plate 40 and bears against the top of the valving shaft 80. A spring 88, positioned between the head 90 of the valving shaft 80 and the top of the fixed nozzle housing 50, tends to urge the valving shaft 80 to the uppermost position. The splash plate 40 is urged to the uppermost position, as mentioned previously, by means of spring means 46 which bears against the top of the nozzle housing 50 and the bottom of the splash plate 40 and fits into the receiving boss 48.
Threading the locating pin 43 down towards the valving shaft 80 will permanently depress the valving shaft 80 for purposes of restricting the flow of water to the nozzle of ,rll~
. a_ ~301215 the sprinkler.
Figures 17 through 20 are another embodiment of the sprinkler of this invention differing from the embodiment shown in Figures 1 through 4 in the different control means and valve means used to restrict the flow of liquid to the nozzle in relation to the angular position of the nozzle. In Figures 17-20, where applicable, the elements are specified in the same manner as in Figures 1-4 and have the same function.
Referring to Fig. 17 the water dispersing apparatus 20, has a main pipe 22 which carries water up to the dispensing head 24. As shown in Fig. 18, water can also enter the main pipe 22 through the "T" or the right angle fitting 26. The entire assembly is screwed down onto the top of threaded mounting pipe 28 by means of a threaded collar 30. Water from mounting pipe 28 will pass through the end of the collar 30 into the lower portion of the assembly, and then pass up through a swivel joint 32, into sprinkling device to the dispensing nozzle 34. The dispensing nozzle 34 is controlled by means of an impulse feeder 36, actuated by the water stream leaving dispensing nozzle 34, to push the dispensing nozzle 34 around the joint 32 until the bottom of the nozzle 37 engages the stop guides 38.
The splash plate 40 is mounted on the top of the dispensing head 24. The splash plate 40 has a splash end 44 that is depressed and adapted to deflect the stream of water leaving the dispensing nozzle 34. The top of the plate 40 is pivotedly mounted to a fixed housing S0 by means of a pivot pin 42 and spring means 46 fitting inside a boss 48 in the underside of the splash plate 40 and extending to the top of the fixed housing 50. The back 54 of the splash plate 40 ~301215 extends downward and rests against the cam surface 56 which is positioned around the inlet nozzle 34 adjacent or proximate to a fixed and rigid support member 58. The plurality of thumb set screws 60 positioned around the support member 58 are threadably engaged therewith.
Threading the set screws 60 inwardly or upwardly, adjust the height of the camming surface 56 causing the splash end 44 of the splash plate 40 to be lowered causing a greater deflection of the water leaving the nozzle 34; and thereby reducing the range.
The bottom of the back of the splash plate 54 or the control arm 64 has a cam following section 66 having a surface offset relative to the perpendicular of the axis of the arm 64.
The control arm 64 is made of two separate pieces 70, 72 having a telescoping relationship to each other, alternatively, a fitting such as a push rod-type turn-buckle.
The outer piece 70 is hollow and has a hole therein which is adapted to receive a thumbscrew and wing nut arrangement 74 passing therethrough. This enables the inner piece or lower end 72, which is slotted (not shown) to slidably fit within the outer piece 70. This arrangement permits the control arm 64 to be lengthened or shortened by loosening the wing nut 74 and retightening it after the appropriate positioning of the end piece 72.
Figures 19 and 20, in particular, show the details of the control means and valve means used in this embodiment to restrict the flow of liquid to the nozzle in relation to setting of the camming surface and in the angular position of the nozzle. A butterfly valve 166 is provided in the inlet pipe 52 to the nozzle 34. As shown in Figures 19 and 20, the butterfly valve has a crank arm 168 extending from the mounting axle 170 of the valve 166. The mounting axle 170 or pivot member supports the valve body 166 within the inlet nozzle 52. The crank arm 168 is connected to the cam follower 66 by connecting rods 172 and 174 which are adjustably connected to each other through slots 176 and 178 by screw 180 and nut 1~2. This adjustment means permits this inlet throttle valve 166 to be adjusted in relation to the cam follower arm 66.
Thus the valve will throt~le the amount of water that will reach the nozzle 34 in relation to the setting of the camming surface 56. The valve 166 will restrict the amount of water that reaches the nozzle 34 where the camming pattern is set to restrict the flow from the nozzle 34 to a shorter distance. Similarly, where it is desired to have maximum range on the sprinkler, the crank arm 168 and rods 176 and 178 will set the butterfly valve 166 in the maximum open position to provide a minimum restriction to the flow which will be reaching the nozzle 34.
In Fig. 5, a typical spray pattern, which can be accomplished by the described device is shown. By greater deflection downward of the splash plate 40 at radial positions 4 to 5 o'clock (D) and 7 to 8 o'clock (F) as shown in Fig. 5. Similarly, in the 6 o'clock position (E) where there is almost no deflection by the splash plate 40, as well as in the 11 and 1 o'clock positions, (A and C), the range will be longer and, therefore, the water will have a further reach.
Figs. 6 and 7, show the effect of the deflection of the water as seen from the side. It is clear that only a ~30121S
relatively small vertical deflection of the control arm 64 of the splash plate 40 will be sufficient to pivot the plate 40 sufficiently to greatly increase or decrease the range of the stream 76 that is exiting from the nozzle 34.
S Fig. 7 shows the effect on the spray flow 76 of adjustments in the locating pin 43 to raise or lower the valving shaft 80 within the sprinkler head. By lowering the locating pin 43 and, therefore, lowering the valving shaft 80 into the flow path to the nozzle 34, a weaker flow is obtained for a given angle than would be the case if the valving shaft 80 were raised higher.
In Figs. 8 and 9 another embodiment of the camming means is shown, in which the camming surface 150 is threadably and, therefore, positively engaged to the cam setting means, in this case by means of thumb screws 152 threadably engaged to the support plate 154 as in the previous embodiment.
However, a washer 96 is threadably positioned below the flexible cam surface 150. The cam follower end 156 of the splash plate is modified to include a specific cam follower member 98 which is fitted into a hoo~ed portion 100 at the end of the cam follower end 156 so that cam surface 150 forces, are downward instead of being upward forces in the embodiment in Figs. 1 and 2. Thus, between the cam surface 150 and the cam follower 156, the cam surface 150 exerts a downward force to extend the range and tilt the splash head upwaxd to allow the maximum range. In effect, this is a more positive type of camming in that there is always engagement between the cam surface 150 and the cam follower 156 as the head rotates around the camming surface 150.
Fig. 10 shows another embodiment by which the cam surface 150 can be adjusted. In this case, the support plate 160 has an annular shoulder 102 and the thumb screw 104 having a tapered point 102 is threadably engaged in the horizontal position. Extending the thumb screw 104 inward will tend to raise up the cam surface 158. Withdrawal of the thumb screw 104 will allow the cam plate or surface 158 to retract or lower.
Fig. 11 shows yet another modification of the cam setting means, somewhat similar to that shown in Fig. 10, but in which an eccentric lobe 106 is fitted onto the end of the thumb screw 108 to augment the displacement of the cam plate 164 by rotation of the screw 108. The device, shown in Fig.
11, is extremely advantageous in that it allows for a very quick and rapid setting and a very sensitive setting of the camming plate 164.
After much time has been spent in positioning the sprinkler and setting the full pattern, as has often been the problem in the past, this effort is all wasted once the sprinkler is removed as is often the case when the lawn is mowed. In order to overcome this situation a special receptor member, shown in Fig. 12 as 110, is provided which has a Y-shaped cross section or any easily positioned shape, whether it be square, oval, Y-shaped, etc. Preferably it has extending arms 112 so that once positioned into the earth, it will not be able to rotate or will not rotate under the force of the rotating forces that act on the sprinkler. The sprinkler is provided with a standard mounting spike 114 connected to the sprinkling device in the standard manner and which has a cross section which mates with the mounting ~30121S
member receptacle 116 that is placed into the ground.
Therefore, by positioning the sprinkler mounting spike in the mounting receptacle 116. Thus the same initial orientation of the camming surface with the area to be watered can always S be maintained so ~hat the setting of the sprinkler will always remain constant.
In Figs. 13A, B and C, and Figs. 13AA, BB and CC, yet other embodiments of the invention are shown, in which a water turbine type head is used to dispense water from one or more continuously rotating dispensing arms. Referring to all of these Figures, the base 120 has water inlet 122 which then passes up through a central column 124 and passes into dispensing arms 118. Each dispensing arm 118 has an eccentrically positioned cam following surface 126. The eccentrically positioned cam follower surface 126, extends outward from each arm 118 and contacts the camming surface 128 which is mounted around the central column 124. The surface 128 is positioned by means of the cam positioning means or thumb screws 130 threadably mounted into the support plate 132 in a manner as has been previously described. The type of rotary sprinkler here tends to operate at relatively high speeds, though the apparatus can operate at low speed and low pressure with equally good results, and the eccentric cam following surface 126 attached to each arm will tend to follow the setting of the camming surface 128. By following the setting of the camming surface 128, the spraying arms 118 which extend from the central rotating housing are raised or lowered.
As shown in Figs. 13B and 13BB, water passes to the inlet of the dispensing arm 118 from the central column 124, 130~2~5 through mating holes 134 and 136 in the inlet and housing, and into the end of the arm 118.
Fig. 13A shows a preferred method of connecting the rotating sprinkler arm 118 with the camming surface 128. The connecting means consis~s of two arms 134, 136, one of which 134, is rigidly connected to the sprinkler spray arm 118, and the other 136, is pivotably connected to the fixed arm 134 and descends downward to ride on the top of the camming surface or underneath the camming surface 128 in the manner shown in Figs. 8 and 9 herein. A spring means 137 is connected, between the descending articulated arm 136 and the fixed arm 134 connected to the sprinkler arm 118. The spring means keeps the fixed arm 131 in proper position for the cam follower end 126 to contact the cam surface 128.
As nGted in Fig. 13A, the outside edge of the cam surface 128 contacts lower descending arm 136 and prevents the arm from moving substantially from the vertical.
Therefore, as the vertically disposed descending arm 134, 136 moves up and down with the variation in the setting of the camming surface 128. The spring means connecting the articulated vertical arm 136 will cause the arm 134 fixed to the spray arm 118 to rotate in relationship to the setting of the camming surface and therefore, moving the spray arm 118 up and down.
Optionally, as depicted in Figs. 13AA and BB, one of the articulated arms, i.e. 136 in Fig. 13A, may be dispensed with and the arm 134 prevented from moving vertically and maintained in contact with the camming surface 128 by spring means 184. The spring means 184 is connected to the bottom of arm 118 and to extending member 186 extending from the . . ~, ~
~3~12i5 central column 124. The sprin~ means 184 maintains the cam follower in contact with the camming surface 128 and yet permits the arm 118 to rise and fall with the camming action as it rotates.
A valving arrangement i5 also provided to proportionately reduce the amount of flow to the spray arm 118 whan in the lower position. This is shown in Fig. 13C.
A triangular passage 140 is provided in the receptacle 143 for the valve arm 118. Rotation of the rectangular passage 145 in the valve arm 118, in relation the triangular passage 140, will tend to reduce the cross-sectional area of the passage for flow and thereby effectively reduce water flow.
As shown in Figs. 13AA and 13BB, arm 118 can be maintained in a fixed position, to thereby assure a constant cross-sectional area for liquid flow by a lock-nut 188 threadably engaging arm 118 and abutting central column 124. When it is desired to secure the arm, lock-nut 118 is threaded toward the central column 124 until it abuts the column 124 to thereby lock the arm 118 in position.
Additionally, as shown in Fig. 13B, each of the arms 118 connected to the central rotating column 124 has two elements connected by a coupling means 144. The outer portion of the arm 142 is fixedly positioned in the coupling means 144 by means of a set screw 146, extending through the coupling 144 to hold the angle of the arm 142 fixed in relation to the coupling 144. Similarly, the coupling itself 144 is held fixed, with relation to the angle of the inner arm 149, by means of a second set screw 148 in the coupling 144.
Therefore, the initial setting of the valving setting, produced by the relationship between the rotary position of the arm 118 and the valve port 140 in the receptacle 143, can 130~Z15 be established and still retain the appropriate angular relationship between the nozzle ~nd of the arm 118 and the housing. The rotary position of the housing is controlled by means of the descending control arm 134 as mentioned previously.
It should also be pointed out that the length of arm 134 from the coupling 144 can be controlled and adjusted by means of a thumb and set screw arrangement 141 somewhat similar to that for the arm 64 shown in Fig. lA, where the thumbscrew arrangement can be used to adjust the length of the arm. It should be pointed out that if more than one arm is used, the length of the control arm could be adjusted for each arm so that the angle of the arms could be adjusted with each setting. Therefore you could have in effect, a series of concentric patterns in the manner shown in Figure 15.
Similarly, one arm 118 of the many could be completely removed from the system so as to give a purely circular pattern by merely removing the arms 134, 136 from the camming surface 126. Therefore, it would even be possible to have a situation where one arm could be providing a rectangular or a square pattern while the other arm could be providing a completely circular pattern.
The cutout and rectangular patterns in Figs. 14 and 16 could be obtained by the appropriate setting of the outer arm 142 in relation to the inner arm 149, and setting the inner arm 149 in relation to the valving system 140, 145 so that at a given setting of the camming surface 126, water from the central housing 124 would be completely occluded by means of the valving arrangement between the inner arm 149 and the rotary central housing 124.
Several points should be noted from the previous.
130~2~5 First, the present invention uses many pre~iously known parts in combination with a unique and novel means for positioning the splash plate to adjust the range of the spray from the sprinkler. No elaborate parts are necessary, no delicate machinery is required. The items that are used can be made from standard, relatively available, equipment. Since the item is relatively simple it does not require complicated setting procedures nor is it overly sensitive once properly adjusted. The flexible camming material can be made from any one of a large number of materials presently available which will be durable and still be flexible enough to provide the necessary support. It should also be noted that no special housings are required to enclose the adjusting item and therefore, the item is relatively simple to manufacture and therefore, relatively cheap to manufacture.
Further, the mounting means for accurately mounting and positioning the apparatus insures that once the apparatus has been adjusted for the appropriate spray pattern that it need not be readjusted. It can be removed with ease in order to provide an unobstructed surface in the lawn for the normal mowing that will be required from the abundant grass growth produced by the effective watering of the invention.
As can be seen and is readily apparent, a wide variety of spray patterns can be obtained using this invention and this will greatly enhance the ability to accurately display or dispense water in preselected patterns.
It should be pointed out that while this is shown as a pipe mounted device, or an externally mounted device, or a device intended for use above ground, this system is easily adaptable to "underground sprinklers" which are, in effect, sprinkler heads mounted very low to the surface of the 13~12~LS
ground. All that is necessary is that the splash plate and camming plate be capable of adjustment above the level of the support plate. An inordinate amount of clearance need not be provided as can be seen from the embodiment shown in Figs. 10 and 11.
Claims (4)
1. A water distributing device comprising: resilient camming means; support means; means to adjust the height of the camming means relative to the support means; a spray head mounted for rotatable movement relative to the camming and support means a nozzle on the spray head; a splash plate mounted on the spray head and extending over the nozzle of the spray head; and cam follower means on the end of said splash plate extending down-wardly toward and being directly contactable with the camming means to thereby vary the angle of the splash plate with respect to the long central axis of the nozzle as the spray head rotates in accordance with the height of the camming means.
2. The device of Claim 1, wherein the spray head is rotated by impulse means activated by a stream of water discharging from the nozzle.
3. The device of Claim 2, wherein the means to adjust the height of the camming means relative to the support means comprise a plurality of screw means threaded into said support means and contacting said camming means to prevent said camming means from deforming under contact with said cam follower means.
4. The device of Claim 1, further comprising means of biasing the cam follower means of the splash plate into contact with the camming means.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US55773483A | 1983-12-02 | 1983-12-02 | |
| US557,734 | 1983-12-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1301215C true CA1301215C (en) | 1992-05-19 |
Family
ID=24226678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000468223A Expired - Lifetime CA1301215C (en) | 1983-12-02 | 1984-11-20 | Adjustable cam controlled sprinkler |
Country Status (11)
| Country | Link |
|---|---|
| JP (1) | JPH0724793B2 (en) |
| KR (1) | KR920002906B1 (en) |
| AU (1) | AU570280B2 (en) |
| BR (1) | BR8406043A (en) |
| CA (1) | CA1301215C (en) |
| DE (1) | DE3442496A1 (en) |
| FR (1) | FR2555914B1 (en) |
| GB (1) | GB2150862B (en) |
| IL (1) | IL73654A0 (en) |
| MX (1) | MX162885B (en) |
| ZA (1) | ZA849001B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4329616A1 (en) * | 1993-09-02 | 1995-03-09 | Gardena Kress & Kastner Gmbh | Sprinklers, especially for irrigation of vegetation |
| AT410389B (en) | 2001-01-30 | 2003-04-25 | Drechsel Arno Dipl Ing | IRRIGATION |
| IL142732A (en) * | 2001-04-22 | 2007-02-11 | Naan Irrigation Systems C S Lt | Sprinklers |
| WO2007119235A2 (en) | 2006-04-17 | 2007-10-25 | Haim Shahak | Pop-up sprinkler |
| US8113443B2 (en) | 2006-11-21 | 2012-02-14 | Clever Water Sprinkler Technologies Ltd. | Rotary sprinkler |
| WO2009048183A1 (en) * | 2007-10-08 | 2009-04-16 | Feelux Co., Ltd. | Sprinkler and method for controlling the same |
| TWM525051U (en) | 2016-02-26 | 2016-07-11 | Zhongshan Qingyi Metal Product Entpr Co Ltd | Sprinkler |
| GB2548826B (en) * | 2016-03-24 | 2018-03-28 | Zhongshan Qingyi Metal Products Entpr Co Ltd | Impact water sprinkler with cam driven baffling head |
| US11504725B2 (en) | 2017-03-05 | 2022-11-22 | Clever Water Sprinkler Technologies Ltd. | Rotary sprinkler for varying irrigation pattern |
| US10232388B2 (en) | 2017-03-08 | 2019-03-19 | NaanDanJain Irrigation Ltd. | Multiple orientation rotatable sprinkler |
| CN106903004B (en) * | 2017-04-17 | 2020-02-04 | 宁波大叶园林工业股份有限公司 | Improved range dynamic jumping waterfowl sprinkler |
| CN109122217B (en) * | 2018-08-29 | 2020-11-17 | 昆明理工大学 | But sprinkling irrigation machine of anti-wind |
| CN112854103B (en) * | 2021-03-08 | 2022-05-31 | 四川佑安工程项目管理有限公司 | Highway construction road bed maintenance device |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE424156C (en) * | 1924-03-13 | 1926-01-16 | Alphons Horten | Device for changing the throwing distance of the water sheaf of a circular jet nozzle used for field irrigation |
| US1938838A (en) * | 1931-04-20 | 1933-12-12 | Nathan D Jacobson | Sprinkler |
| US3464628A (en) * | 1967-09-08 | 1969-09-02 | Intern Patent Research Corp | Selective pattern lawn sprinkler |
| US3654817A (en) * | 1970-05-06 | 1972-04-11 | Rain Bird Sprinkler Mfg | Adjustable cam and adjusting means therefor |
| FR2215164B1 (en) * | 1973-01-26 | 1976-11-05 | Doyer Sa Ets | |
| US3960327A (en) * | 1975-02-06 | 1976-06-01 | Olson Richard A | Lawn sprinkler programmer |
| FR2405621A7 (en) * | 1977-10-05 | 1979-05-04 | Sdg | ROTARY SPRINKLER WITH ADJUSTABLE IRRIGATION SURFACE |
| US4198001A (en) * | 1978-04-10 | 1980-04-15 | Rodriguez Ricardo A | Controlled thrust, rotary, adjustable topography sprinkler |
| ZA805971B (en) * | 1979-10-04 | 1981-10-28 | W Stephens | Garden sprinkler |
| US4353506A (en) * | 1980-09-15 | 1982-10-12 | L. R. Nelson Corporation | Pop-up sprinkler |
| IL65516A0 (en) * | 1982-04-18 | 1982-07-30 | Naan Mech Works | Rotary sprinkler having selectable area coverage |
| IL65515A0 (en) * | 1982-04-18 | 1984-05-31 | Scott & Sons Co O M | Pattern controlled sprinkler apparatus |
-
1984
- 1984-11-15 AU AU35458/84A patent/AU570280B2/en not_active Ceased
- 1984-11-19 ZA ZA849001A patent/ZA849001B/en unknown
- 1984-11-20 CA CA000468223A patent/CA1301215C/en not_active Expired - Lifetime
- 1984-11-22 DE DE19843442496 patent/DE3442496A1/en active Granted
- 1984-11-28 FR FR8418091A patent/FR2555914B1/en not_active Expired
- 1984-11-28 IL IL73654A patent/IL73654A0/en unknown
- 1984-11-28 BR BR8406043A patent/BR8406043A/en not_active IP Right Cessation
- 1984-11-30 MX MX203543A patent/MX162885B/en unknown
- 1984-11-30 GB GB08430222A patent/GB2150862B/en not_active Expired
- 1984-12-01 KR KR1019840007587A patent/KR920002906B1/en not_active IP Right Cessation
- 1984-12-03 JP JP59255560A patent/JPH0724793B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| GB8430222D0 (en) | 1985-01-09 |
| IL73654A0 (en) | 1985-02-28 |
| DE3442496A1 (en) | 1985-06-13 |
| JPS60137461A (en) | 1985-07-22 |
| GB2150862A (en) | 1985-07-10 |
| ZA849001B (en) | 1985-09-25 |
| AU3545884A (en) | 1985-06-06 |
| KR920002906B1 (en) | 1992-04-10 |
| FR2555914A1 (en) | 1985-06-07 |
| DE3442496C2 (en) | 1993-09-02 |
| BR8406043A (en) | 1985-08-27 |
| AU570280B2 (en) | 1988-03-10 |
| GB2150862B (en) | 1987-06-24 |
| JPH0724793B2 (en) | 1995-03-22 |
| MX162885B (en) | 1991-07-03 |
| KR850004183A (en) | 1985-07-11 |
| FR2555914B1 (en) | 1988-02-05 |
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Legal Events
| Date | Code | Title | Description |
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| MKEX | Expiry |