| 摘要 |
<p>A sprinkler having a nozzle and a diffuser therefor which cooperate to provide a variable distribution of water from the sprinkler head throughout the entire circumference thereof which accomplishes almost complete uniformity of distribution of the water within the maximum and minimum limits of projection of the eater stream from the head. The nozzle is continuously driven in a circular direction and intermittently rotates simultaneously with a diffuser plate, the diffuser having diffuser vanes formed thereon which are intermittently interposed into the water stream from the nozzle to break up the pattern and the distribution thereof. The nozzle and diffuser plate travel together for one complete revolution, in fixed relationship to one another. Upon completion of each revolution, the nozzle disengages itself momentarily from the diffuser plate, and indexes itself relative to the diffuser plate a predetermined incremental distance, whereupon it re-engages and makes another complete revolution, so that the nozzle is constantly changing its relationship with respect to the diffuser plate, and the water dispersing or diffusing vanes provided thereon. The relative indexing of the nozzle and the diffuser plate is accomplished by a gear formed on the nozzle, and a pinion carried by the diffuser plate, which pinion engages the gear on the nozzle, and also engages each complete revolution, a stationary pin which is the equivalent of one tooth of an internal gear. When the pinion engages the pin, it causes the aforementioned disengagement of the diffuser and nozzle and indexing of the nozzle to the next diffuser station or vane.</p> |
