Fluid sprinkling – spraying – and diffusing – Slinger or splasher; or deflector rotated relative to effluent – Nozzle delivers fluid to deflector
Patent
1998-06-12
2000-11-07
Weldon, Kevin
Fluid sprinkling, spraying, and diffusing
Slinger or splasher; or deflector rotated relative to effluent
Nozzle delivers fluid to deflector
B05B 304
Patent
active
061423866
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention is in the field of rotary sprinklers and in particular it is concerned with a rotary sprinkler of the kind having a rotatable distributor.
BACKGROUND OF THE INVENTION
In the following description and claims, the term "rotatable distributor" or "rotary distributer" denotes rotatable outlet deflector nozzles and rotors adapted for establishing reactionary force components and which at times are also referred to as "swivels" or "reaction swivels".
Rotary sprinklers generally fall into two categories, generally referred to in the art as "sprayers" and "sprinklers". Sprayers, typically have essentially low flow rate and short irrigation range, that owing to the essentially high speed of revolution of the distributor, causing atomization of the water jet into spray.
The second category of rotary sprinklers, the so-called sprinklers, are suitable for use with essentially high flow rates and provide irrigation range than sprayers. However, such sprinklers require dynamic seals between the moving parts of the sprinkler. The higher the flow rate of a sprinkler, the larger the size of the seals which entails friction increase, resulting in wear of moving parts, etc.
U.S. Pat. No. 3,034,728 is directed to a lawn sprinkler comprising a water supply pipe vertically extending and formed with a water discharge opening at its upper end with a stem extending through the opening and a reaction-operated rotary drive for rotating the stem about a vertical axis. There is fitted a laterally extending head on the stem above the opening in which the undersurface of the head slopes upwardly and outwardly from the stem in order to deflect water issuing from the opening in a lateral direction and where the slope is uneven along the cross-section of the distribution head.
A serious drawback of the invention disclosed in the '728 patent is that it is devoid of any speed restriction means leading to a sprayer type sprinkler in which the water emitted is in the form of fine spray emitted to an essentially short range. Another serious disadvantage of that patent is that the stem rotatable within the sprinkler's housing has no bearing supports both at its top and bottom end, entailing unstable rotation of the distribution head and possible accelerated wear of various components.
It is an object of the present invention to provide anew and improved rotary drive sprinkler devoid of dynamic seals.
BRIEF SUMMARY OF THE INVENTION
According to the present invention there is provided a rotary drive sprinkler comprising extending from the housing through said outlet nozzle and around which water is adapted to flow; portion of the shaft and having at least one deflection surface being in stream communication with said outlet nozzle; rotating said drive shaft; and distribution member; seals.
In a preferred embodiment of the present invention said rotary drive mechanism is a water driven turbine or a ball driven impeller, where said drive shaft is articulated to said turbine or impeller.
According to the present invention said at least one deflection surface generates reaction forces oriented in a direction substantially opposite to the direction of rotation of said drive shaft, thereby constituting said speed regulating means. In a specific embodiment of the invention said reaction forces are substantially balanced by a first rotary force applied on the drive shaft directly by water flow acting on said turbine or impeller, whereby the speed of rotation of said distribution member is substantially governed by a second rotary force imparted to said drive shaft by said rotary drive mechanism.
In one preferred embodiment of the invention, the sprinkler is insect and dirt protected wherein said distribution member is axially displaceable between a first position in which said outlet nozzle is substantially concealed, and a second position in which said outlet nozzle is exposed. The distribution member being axially displaceable by axial components of water flow reaction forces, wherein said axial displa
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Dan Mamtirim
Weldon Kevin
LandOfFree
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