| 摘要 |
A liquid spray head 10 e.g. to spray liquid for dust control or watering. The spray head has a body 11, an inlet 12 for receiving the liquid to be sprayed, a spray outlet, and at least one adjuster 15,16,17,18 arranged to adjust size and/or position of the outlet aperture such that a width or position of the aperture is variable, or both the width and position of the aperture are variable, relative to the body, to thereby deliver a desired rate, pattern or direction of liquid spray through the aperture. The adjuster can be ram 17,18 actuated controlling two coaxially aligned collar assemblies 15,16 with left and right adjusting leaves 25,26. A depth actuator works an outer body cover 24 to adjust vertical height of the outlet aperture. Spray aperture size and/or direction can be controlled based on vehicle speed and desired spray pattern/direction. |
