Patent ID: 6023981
Filing Date: 2000-02-15
Classification: G01N

Abstract:
A sampling box, comprising:an upper body portion, said upper body having a single substantially straight sample inlet having a receiving end and a discharge end, a testing chamber, and a bottom wall, said sample inlet tapered from a first dimension at said receiving end to a second dimension smaller than said first dimension at said discharge end such that air and particulate matter entrained therein are directed towards a center of a filter, said sample inlet in fluid communication with said testing chamber;a lower body portion, said lower body portion having a rectangular slot therethrough, a piston chamber, and a vacuum connection;a slidable drawer positioned within said rectangular slot, said drawer having a circular hole therein, said drawer further having an operative and an inoperative position;a filter cartridge, said filter cartridge movably fitted within said circular hole and supporting said filter;a movable piston located within said piston chamber and under said filter cartridge, said piston having a central passage through which a vacuum tube passes, said vacuum tube being in fluid contact with said vacuum connection;a piston raising and lowering mechanism;whereby when said piston is raised it causes said filter cartridge to be raised against said bottom wall of said upper body portion such that all air entering said testing chamber through said sample inlet must pass through said filter and then exit said lower body portion through said vacuum connection via said vacuum tube.