Method of and apparatus for remotely controlling orifice-opening and orifice-closing operations

摘要

A nozzle, e.g. for an air sampler, is opened by remote control by the firing of a squib which breaks loose a silicone-sealing body which is normally pressed by spring force against the nozzle orifice. When the body breaks away, a closing frame swings into position and upon the remotely controlled firing of another squib allows a spring biased closing member to engage with its silicone seal the orifice.