Sprinkler systems
First Claim
1. In a sprinkler having a head mounting a nozzle for dispersing fluid through said head and out of said nozzle and impeller means associated with said head operatively engaging said nozzle for rotating said nozzle in response to said fluid passing through said head, said impeller means including transmission means for transmitting movement of said impeller means to said nozzle, the improvement which comprises:
- nozzle rotation control means associated with said impeller means for rotating said nozzle at a substantially constant rate of rotation regardless of the flow rate of fluid being dispersed out of said nozzle, said nozzle rotation control means including fluid directing means for directing fluid flow to said impeller means, and valve means for varying the flow rate of fluid through said fluid directing means to maintain a substantially constant velocity flow rate for changing volume flow rates of fluid flowing to said impeller means.
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Accused Products
Abstract
Improvements in sprinkler systems having fluid under pressure flowing therethrough and a sprinkler head with a pop-up nozzle actuated by fluid pressure. An impeller is actuated by the fluid flow to rotate the nozzle and thus rotate the spray of fluid threfrom. A transmission is disposed between the impeller and the nozzle for transmitting rotation of the impeller to the nozzle. Means are provided for regulating the rate of rotation of the impeller, and then the nozzle, under varying volume flow of fluid being sprayed thereout. This may be accomplished by a substantially constant velocity of incoming fluid impinging on impeller blades. This velocity may be maintained substantially constant by a variable resistance valve in association with a stationary stator having blades thereon which valve moves with respect to the stator to provide a guided substantially constant velocity of jets of fluid on the impeller blades to rotate the same which in turn rotates the nozzle at a substantially constant rate of rotation.
72 Citations
22 Claims
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1. In a sprinkler having a head mounting a nozzle for dispersing fluid through said head and out of said nozzle and impeller means associated with said head operatively engaging said nozzle for rotating said nozzle in response to said fluid passing through said head, said impeller means including transmission means for transmitting movement of said impeller means to said nozzle, the improvement which comprises:
nozzle rotation control means associated with said impeller means for rotating said nozzle at a substantially constant rate of rotation regardless of the flow rate of fluid being dispersed out of said nozzle, said nozzle rotation control means including fluid directing means for directing fluid flow to said impeller means, and valve means for varying the flow rate of fluid through said fluid directing means to maintain a substantially constant velocity flow rate for changing volume flow rates of fluid flowing to said impeller means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. In a sprinkler having a head mounting a nozzle for dispersing fluid through said head and out of said nozzle and impeller means associated with said head operatively engaging said nozzle for rotating said nozzle in response to said fluid passing through said head, said impeller means including transmission means for transmitting movement of said impeller means to said nozzle, the improvement which comprises:
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a support member mounted in said sprinkler downstream of said impeller means having a main body portion, a generally circular opening therethrough, and a plurality of spaced radially extending stator blades extending about said opening on the side of said main body portion adjacent said impeller means; a valve movable in said opening having a valve stem extending in a direction along generally the central axis of said opening on the side thereof opposite said impeller means and a valve member conformably fitting in said opening fixed to said stem, said valve member being disposed on the side of said opening adjacent said impeller means; and biasing means associated with both said valve and said support member for normally biasing said valve member against said opening. - View Dependent Claims (18)
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19. In a sprinkler having a head mounting a nozzle for dispersing fluid through said head and out of said nozzle and impeller means associated with said head operatively engaging said nozzle for rotating said nozzle in response to said fluid passing through said head, said impeller means having impeller blades upon which fluid entering said head impinges thereon to rotate the same and including transmission means for transmitting movement of said impeller means to said nozzle, the improvement which comprises:
variable resistance valve means associated with a stationary stator mounted in said head, said valve means being movable with respect to said stator when incoming fluid impinges on said valve means to thereby move said valve means to maintain a substantially constant velocity flow rate of jets of fluid on said impeller blades to rotate the same at a substantially constant rate of rotation to thereby rotate said nozzle at a substantially constant rate of rotation regardless of the flow rate of fluid dispersed out of said nozzle. - View Dependent Claims (20, 21, 22)
Specification