| 摘要 |
Airless spray equipment is described that is free from clogging. The clogging is prevented by passing the liquid, upstream of the spray tip, through anticlogging means comprising a constricted orifice which surrounds a mandrel that has a fluted end and that extends past the orifice entrance. The mandrel is slidably mounted in the orifice with a spring to bias it against movement by fluid pressure. Any solids in the liquid that would clog the spray tip are abraded by the action of the mandrel. In a preferred embodiment, the orifice and mandrel assembly is used with a pole spray extension having a slave valve at its discharge end to eliminate any spitting of liquid. The pole assembly is formed from a plurality of sections that are readily attachable with a threaded male coupling.
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