| 摘要 |
A sprinkler (20) rotates and creates a predefined horizontal spray pattern around it. A rotating turbine (34) drives a cylindrical nozzle (44) assembly having a plurality of nozzle openings (52) therein. The nozzle openings deliver streams of water of variable length and volume. A pattern defining disk (40) has an aperture (39) which is used to continuously and proportionately expose the nozzle openings (52) to the source of pressurized water according to a preset function of the instantaneous rotational position of the nozzle opening (52) as the cylindrical member (44) turns to create the spray pattern. When the aperture (39) is rectangular, a rectangular spray pattern is obtained. The nozzle openings (52) supply a relatively constant volume of water to all portions of the pattern. <IMAGE> |
