A gas pressure neutralizing device for use with a working channel of an inspection instrument. The device comprises means for providing a first gas pressure buffer, a second gas pressure buffer, a chamber formed therebetween and means for reducing the pressure in the chamber whereby gases are substantially...http://www.google.fr/patents/US4874364?utm_source=gb-gplus-shareBrevet US4874364 - Inspection instrument channel aspirator and pressure neutralizing device
Inspection instrument channel aspirator and pressure neutralizing device
