| 摘要 |
Fluid spreading apparatus comprising a discharge head structure including at least two spaced apart head portions adapted to direct fluid outwardly in different directions. Each head portion disclosed is a coil of tubing having several upstanding convolutions, each with outwardly directed fluid-emitting openings. The inner end portion of the tubing in each coil is fixed on the head structure and each corresponding outer end portion is rotatably adjustable about its own axis to vary the fanwise spread configuration of the coil to vary the trajectories of fluid streams projected through the fluid-emitting openings. Valve means between the head portions and in series with a supply conduit of fluid under pressure is operative cyclically to effect a gradual decrease in the flow of fluid from the supply conduit to one of the head portions and a gradual increase in the flow of fluid from the supply conduit to the other of the head portions. This cyclically decreases and increases the distance that discharged fluid is projected from the head portions thereby simulating an oscillating appearance in the fluid streams projected. The valve means is automatically operated by a fluid motor driven by fluid flowing from the supply conduit to the head portions.
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