BACKGROUND OF THE INVENTION
The present invention relates to a spray oscillating control apparatus for sprinklers wherein two opposite inlet orifices of a water duct cooperatively work with covering blocks and water intake passageways of a spray control device, and a linkage gear wheel of the spray control device is directly meshed with one matched gear of a gear train assembly to rotate the covering blocks in linkage so as to switch the amount of intake water supply in a sequential order; thereby the spray control device can avoid being interfered by the water stream, and the gear train assembly can accurately rotate the spray control device in a smooth and efforts-saving manner.
Please refer to FIG. 1 showing a perspective cross sectional view of a conventional spray oscillating control apparatus for sprinklers. Such a spray oscillating control apparatus includes a sprinkling device 10 wherein water stream passing through an inlet port 11 is jetted towards a water wheel 12, causing the rotation of the water wheel 12 and the actuation of a gear shaft 13 therewith. Then, the gear shaft 13 will drive a worm gear 14 and cause a cylindrical wheel 15 fixed to the same axle to rotate with the worm gear 14 as well. A protruding shaft 161 abutted against a spiral guiding recess 151 of the cylindrical wheel 15 will be pushed by the rotation of the spiral guiding recess 151 and limited to move back and forth within an oval-shaped elongated slot 171 of a sliding seat 17. Accordingly, an integrally molded plug body 16 is forced to move back and forth towards or away from a water outlet orifice 18 so as to change the room of water discharge and, thus, vary the amount of water sprinkled through the water outlet orifice 18 thereof.
There are some disadvantages to such a conventional spray oscillating control apparatus for sprinklers. First, the water stream rotating the water wheel 12 must be projected under a sufficient water pressure so as to actuate the rotation of the cylindrical wheel 15 and the plug body 16 in a sequence. In case of a low water pressure, the water stream jetted towards the water wheel 12 becomes impotent to rotate the cylindrical wheel 15 and the plug wheel 16 which, subjected to interference from each other, tends to stop rotating in operation thereof. Second, when the plug body 16 moves back and forth within the sliding seat 17 thereof, water stream can infiltrate into the sliding seat 17 via the oval-shaped elongated slot 171. Therefore, even in case of a high water pressure, the water stream accumulated within the sliding seat 17 thereof can form a layer of resistance, causing the plug body 16 to be blocked thereby. Besides, the water wheel 12 can also be interfered by the plug body 16 and becomes hard to rotate in operation thereof.
Another conventional spray oscillating control apparatus for sprinklers is disclosed in the U.S. Pat. No. 4,860,954 wherein the sprinkler utilizes the rotation of an impeller to actuate the back-and-forth movement of a shaft, and an eccentric cam is disposed at one end of the shaft in communication with a tube. Most of all, the second prior art makes use of numerous assembly parts and is characterized by a complicated structure, which makes it rather difficult and time-consuming to assemble.
SUMMARY OF THE PRESENT INVENTION
It is, therefore, the primary object of the present invention to provide a spray oscillating control apparatus for sprinklers wherein a linkage gear wheel of a spray control device is directly meshed with one matched gear of a gear train assembly to provide a linkage mechanism, permitting a set of covering blocks to rotate in a gradual manner to switch the amount of intake water supply so that the spray control device can avoid being interfered by water stream in operation, and the gear train assembly can accurately actuate the rotation of the spray control device in an easy and smooth manner.
It is, therefore, the second object of the present invention to provide a spray oscillating control apparatus for sprinklers wherein a set of inlet orifices of a water duct cooperatively work with the covering blocks and water intake passageways of the spray control device, and the linkage gear wheel of the spray control device is directly rotated by the gear train assembly thereof in a gradual manner, facilitating an easier and more accurate operation and design of the present invention thereby.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective cross sectional view of a conventional spray oscillating control apparatus for sprinklers.
FIG. 2 is a cross sectional of the assembly of the present invention.
FIG. 3 is an exploded perspective view of a spray oscillating control apparatus of the present invention.
FIG. 4 is a cross sectional view of the assembly of the spray oscillating control apparatus of the present invention.
FIG. 5 is a diagram showing a spray control device of the present invention shifted to a stage of maximum water supply.
FIG. 6 is a lateral side view of FIG. 5 in rotating operation.
FIG. 7 is a diagram showing the spray control device of present invention gradually rotated to a stage of medium water supply.
FIG. 8 is a lateral side view of FIG. 7 in rotating operation.
FIG. 9 is a diagram showing spray projected from the present invention and evenly distributed onto a lawn in a far-to-near and near-to-far pattern.
FIG. 10 is a diagram showing the spray control device of the present invention gradually rotated to a stage of minimum water supply.
FIG. 11 is a lateral side view of FIG. 10 in rotating operation.
FIG. 12 is a perspective view of the present invention applied to a vertical-type sprinkler.
FIG. 13 is a perspective exploded view of another embodiment of the spray control device of the present invention.
FIG. 14 is an assembled cross sectional view of another embodiment of the spray control device of the present invention.
FIG. 15 is a diagram showing another embodiment of the spray control device thereof rotated to a stage of maximum water supply.
FIG. 16 is a diagram showing another embodiment of the spray control device thereof gradually rotated to a stage of medium water supply.
FIG. 17 is a diagram showing another embodiment of the spray control device thereof gradually rotated to a stage of minimum water supply.
FIG. 18 is a cross sectional view of the assembly of a third embodiment of the spray oscillating control apparatus in a state of low water pressure.
FIG. 19 is a cross sectional view of the actuation of FIG. 18 in a state of high water pressure.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Please refer to FIG. 2 showing an assembled cross sectional view of the present invention. The present invention relates to a spray oscillating control apparatus for sprinklers wherein a sprinkler (made in a horizontal type or a vertical type as shown in FIG. 12) has a spray body actuated to swing into different angles via a sprinkling control assembly composed of a water inlet end 20, a positioning connector 30, a movable seat 40, a coupling seat 50, a water outlet headpiece 60, and a gear train assembly 70. The water inlet end 20 has an inlet port 21 fluidly connected to an adjusting port 221 of a water control valve 22 that can be adjusted to regulate the amount of water supply thereby. The positioning connector 30 has a restricting hole 31 disposed at one side to cooperatively work with a push rod 321 of a water intake switch device 32 so as to switch water outlets (non-illustrated in the diagram) and, thus, change the swinging direction of the spray body thereby. The coupling seat 50 is mounted between the movable seat 40 and the water outlet headpiece 60 thereof. The gear train assembly 70, having one end mounted to one side of the coupling seat 50, is accommodated to the interior of the movable seat 40 therein. The gear train assembly 70 is equipped with a front-end gear 701 to reciprocally mesh with a fixed gear 81 of a water duct 80 and a rear-end gear 702 to mesh with a drive gear linked to an impeller wherein the impeller and the drive gear are respectively situated at both sides at the center of the connector seat 50 thereof. The impeller thereof is rotated in a direction determined by that of the intake water stream flowing through the water outlets thereof. The water duct 80 is mounted to the interior of closely connected channels 23, 41 of the water inlet end 20 and the movable seat 40 thereof. The interior of the channel 23 of the water inlet end 20 is provided with a ring seat 232 having a plurality of insert blocks 231 protruding thereon for the engaging location of a positioning fitting 90 having a plurality of insert recesses 91 defining the surface thereon as shown in FIG. 3. The positioning fitting 90 has an annular tapered end equipped with a plurality of reverse-stop plates 92 and flexible plates 93 that are alternatively arranged to each other wherein each flexible plate 93 has toothed ribs 931 defining the inner surface thereon. The water duct 80 has a stepwise stop seat 82 with a toothed surface 821 defining thereon extending at the opposite end of the fixed gear 81 thereof for the coupling of the positioning fitting 90 therewith, permitting the toothed ribs 931 of the flexible plates 93 to elastically extend and mesh with the toothed surface 821 thereof respectively, and the reverse-stop plates 92 to accurately abut against the inner edge of the stop seat 82 thereon. The water duct 80 has a middle section equipped with a plurality of annular grooves 83 each having a sealing ring 831 accommodated therein, and a pair of opposite inlet orifices 84 defining thereon. The sealing rings 831 thereof are respectively abutted tight and close against the inner walls of the channels 23, 42 of the water inlet end 20 and the movable seat 40 so as to achieve watertight effect and avoid the problem of water leakage thereby. Besides, the fixed gear 81 and the stop seat 82 extending at both end edges of the water duct 80 are respectively supported by the channel 41 and the reverse-stop plates 92 thereof to retain the water duct 80 in abutting location thereby. And a lubricating plate 85 is sandwiched between the fixed gear 81 and the channel 41 thereof. The water duct 80 also has a stepwise ringed abutment seat 86 defined by a cavity 861 thereon disposed at the interior of one end therein, and a vent 862 of smaller diameter disposed at the center of the cavity 861 thereon, permitting a movement chamber 87 and a water-collecting chamber 88 to respectively form at both lateral sides of the ringed abutment seat 86 thereof. The inlet orifices 84 and the vent 862 thereof allow water stream to flow into the interior of the movable seat 40 thereby. In addition, a spray control device 89 is provided with a linkage gear wheel 891 to mesh with one matched gear 703 of the gear train assembly 70. The spray control device 89 is pivotally mounted to the interior of the movement chamber 87. At the opposite end of the linkage gear wheel 891 of the spray control device 89 is disposed a linking plate 892 and a pair of covering blocks 893 correspondingly matched to the inlet orifices 84 to form an H-shaped configuration thereby. The covering blocks 893 are symmetrically bulged outwards in the middle to figure opposite arcuate curvatures and extend at both lateral sides of the linking plate 892, permitting a water intake passageway 894 to form at both upper and lower sides of the linking plate 892 respectively. Moreover, the covering blocks 893 contact with the ringed abutment seat 86, permitting the linking plate 892 to extend across on top of the cavity 861 with an appropriate space maintained thereby as shown in FIG. 4.
In operation, when the gear train assembly 70 is rotated by the drive gear of the impeller in a direction determined by that of the intake water stream to actuate the swinging movement of the spray body B therewith, the matched gear 703 of the gear train assembly 70 will rotate the linkage gear wheel 891 of the spray control device 89 in linking mechanism therewith. When the water intake passageways 894 of the spray control device 89 are completely aligned with the inlet orifices 84. thereof as shown in FIGS. 5, 6, a larger amount of water supply will be allowed to pass through the inlet orifices 84 disposed at both lateral sides of the water duct 80 and the vent 862 to stream through the movement chamber 87 and enter the movable seat 40 before flowing through the water outlets of the connector seat 50, the impeller, and the water outlet headpiece 60 in a sequence to be projected outwards via the spray body B into the atmosphere. Meanwhile, spray A can be jetted outwards to a farther distance in the stage of large water supply. And while the gear train assembly 70 persists in the rotating operation thereof, the covering blocks 893 will be gradually rotated to approach the inlet orifices 84 and cover them up step by step as shown in FIGS. 7, 8 so as to change the amount of intake water supply in a sequential order. Thus, depending on the swinging movement of the spray body B and the amount of intake water supply, the spray A projected will oscillate rhythmically from far-to-near and then near-to-far in distance to achieve an even distribution onto a lawn thereby as shown in FIG. 9. When the covering blocks 893 are rotated to completely cover up the inlet orifices 84 as shown in FIGS. 10, 11, the water stream, except infiltrating through gaps between the covering blocks 893 and the inlet orifices 84, will keep flowing through the vent 862 of the water-collecting chamber 88 to enter the movement chamber 87 thereof. Thus, even when the inlet orifices 84 are completely closed by the covering blocks 893 (that is the spray A is sprinkled to a near distance), sufficient amount of intake water supply can still be maintained to actuate the impeller and the gear train assembly 70 and facilitate normal swinging movement of the spray body B, achieving the best state of application thereby. Furthermore, the linkage gear wheel 891 of the spray control device 89 is directly meshed with one matched gear 703 of the gear train assembly 70 to form linking mechanism, permitting the covering blocks 89 to rotate therewith and switch the amount of intake water supply in a gradual manner thereby. Therefore, the spray control device 89 can avoid being interfered by the water stream in operation, and the gear train assembly 70 can accurately actuate the rotation of the spray control device 89 in a smooth and effortless manner thereby.
Furthermore, when force is exerted to bend the spray body B and synchronically move the water outlet headpiece 60, the coupling seat 50, the gear train assembly 70, and the movable seat 40 in linking mechanism, the fixed gear 81 of the water duct 80 meshed with the front-end gear 701 of the gear train assembly 70 will be actuated to rotate the water duct 80 within the channels 23, 41 of the water inlet end 20 and the movable seat 40 thereof. Meanwhile, via the design of the toothed ribs 931 of the flexible plates 93 elastically bound and meshed with the toothed surface 821 of the water duct 80, the toothed surface 821 of the water duct 80 will bounce open the flexible plates 93 of the positioning fitting 90 and run counter to the toothed ribs 931 of the flexible plates 93 to form stepwise idle rotation thereby. Therefore, when the spray body B is bent by force, resistance can be generated so as to avoid damages of the spray body B caused by excessive force exerted thereon.
Please refer to FIG. 13 showing an exploded perspective view of another embodiment of the spray oscillating control apparatus of the present invention (accompanied by FIG. 14). The present invention can also include a water duct 80′ having a fixed gear 81 ′ and a stop seat 82′ defined by a toothed surface 821 ′ extending at both ends thereof, and a plurality of annular recesses 83′ preset at appropriate positions thereon for the accommodation of a sealing ring 831 therein respectively. The water duct 80′ also have a pair of fan-shaped inlet orifices 84′ symmetrically disposed at the inner side of one end therein to define a pair of stop faces 841′ symmetrically formed there-between, permitting a movement chamber 85′ and a water-collecting chamber 86′ to form at both sides of the stop faces 841′ and fluidly connect with the inlet orifices 84′ thereof. A spray control device 89′ is equipped with a linkage gear wheel 891′, and a pair of covering blocks 892′ extending at the opposite end of the linkage gear wheel 891′ and similarly shaped like the inlet orifices 84′ thereof. The covering blocks 891′ thereof are made slightly larger than the inlet orifices 84′. Therefore, when the linkage gear wheel 891′ of the spray control device 89′ is actuated to rotate along with the gear train assembly 70 thereof, the two covering blocks 892′ are allowed to rotate on the stop faces 841′ thereof and gradually cover up the two inlet orifices 84′ step by step so as to switch the amount of intake water supply thereby. When the covering blocks 892′ completely close onto the stop faces 841′, the water stream gathered at the water-collecting chamber 86′ will be allowed in a larger amount to flow through the two inlet orifices 84′ and the movement chamber 85′ to enter the interior of the movable seat 40, permitting the spray A sprinkled to go farther in distance as shown in FIG. 15. If the covering blocks 892′ keep rotating to cover up the two inlet orifices 84′ in a gradual manner from a partially to completely covered stages as shown in FIGS. 16, 17, respectively, the spray A projected will oscillate from far to near in distance so as to sprinkle the lawn in an even and uniform manner.
Please refer to FIG. 18 showing an assembled cross sectional view of a third embodiment of the present invention applied in low water pressure. A pressure-relief valve 863 having a spring 8631 mounted thereon can be accommodated to the vent 862 of the water duct 80 thereof. Both ends of the pressure-relief valve 863 are respectively disposed a tapered stop flange 8632 and an annular stop flange 8633 wherein the annular stop flange 8633 is elastically supported by the spring 8631, permitting the tapered stop flange 8632 to precisely abut against the inner wall of the cavity 861 thereof. And the linking plate 892 of the spray control device 89 can also have a recessed groove 8921 indented at one end edge to precisely correspond to the vent 862 so that the pressure-relief valve 863 can be actuated to move within the vent 862 towards the recessed groove 8921 thereof. In case of low water pressure, the water flow will be allowed to enter through the inlet orifices 84 as well as the pressure-relief valve 863 and the vent 862 thereof. However, in case of high water pressure, the annular stop flange 8633 will be pushed by the water pressure to compress the spring 8631, and the pressure-relief valve 863 is guided to slide along the vent 862 and move towards the recessed groove 8921 as shown in FIG. 19 so as to achieve the function of pressure release thereby.
Patent Application
20070119979
