| 摘要 |
<p>The liquid-spraying equipment from a closed vessel has a hand-operated suction-and-pressure pump, and a spring-loaded valve directly upstream of the nozzle, opened by pressure in the pump chamber. The moving part of the valve is a slide (10), whose outer periphery forms a seal against the inside wall of a cylindrical chamber (23). There are one or more apertures (21) in the chamber wall, connecting the pump chamber to the nozzle (22). These apertures are only opened after the valve slide has started to move. The slide can be a plunger, shutting off the apertures in one end position, while its spring (11) is a accommodated in an extension of the cylindrical chamber, shut off from the apertures and from atmos.</p> |
