| 摘要 |
An improved airless spray gun suitable for fine finish spraying. The spray gun includes a body with a spray nozzle assembly secured to its forward end. The nozzle assembly houses a valve assembly and more particularly a valve seat of special shape and location and a needle designed to cooperate with the seat. Contact between the valve seat and the needle defines a closed position, whereas the needle and seat may be moved relatively apart to an adjustably controlled open position, permitting paint or other fluid under pressure to flow at an adjustable controlled flow rate through an annular passageway between the valve seat and the needle, to be formed by the shape and location of the parts into a thin annular cone-shaped sheet, with its vertex impinging at a spray nozzle opening, and to be forced through the nozzle and atomized thereby producing a spray pattern suitable for fine finish spraying.
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