| 摘要 |
A sector spray device comprising a stationary feedpipe having at its lower end a stationary discharge control cap, which possesses a discharge slot. The sector spray device further comprises a drive means for rotating a sleeve to which are attached discharge tubes that are from time to time during their circle of rotation in fluid communication with the discharge slot of the control cap. Thus, liquid passing through the feedpipe will be discharged through only those tubes in fluid communication with the discharge slot. In this way, the liquid is sprayed in a constant sector-shaped pattern that can be limited to 90 DEG or less, depending upon the discharge slot.
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