Measuring and testing – Sampler – sample handling – etc. – With constituent separation
Patent
1996-02-26
1997-12-02
Williams, Hezron E.
Measuring and testing
Sampler, sample handling, etc.
With constituent separation
55270, 73 2805, 7386471, G01N 122
Patent
active
056938950
ABSTRACT:
An airborne particle impaction system and a particle impaction cell for use therewith. The cell includes a device for holding a removable planar support sheet with a tacky surface. The cell includes an inlet slit adjacent to a support sheet in the cell and an outlet opposite the sheet. A flexible tube connects the cell outlet to a vacuum pump. Air is drawn in the cell inlet slit, travels across the support sheet, around sheet edges and out the cell outlet. Particles in the air stream are forced by inertial forces to impact the support sheet, where they are retained by the tacky layer. The cell further includes a base having a floor, a rim around the floor and the cell outlet and a cover having a top surface bearing the slit and a lip configured to fit within and engage the base rim in a substantially air tight arrangement. A ledge around the base interior supports the corners of a polyhedral sheet. The support sheet is clamped between the cover lip and the ledge. Ideally, the slit exit is spaced closely (e.g. about 1 mm) to the tacky layer and air flow is at about 40 to 50 mph to cause particles having diameters greater than about 2 .mu.m to impact and be captured by the tacky layer while allowing smaller particles to flow away with the air stream.
REFERENCES:
patent: 3957469 (1976-05-01), Nebash
patent: 4725294 (1988-02-01), Berger
patent: 4972957 (1990-11-01), Liu et al.
patent: 5201231 (1993-04-01), Smith
patent: 5304125 (1994-04-01), Leith
patent: 5437198 (1995-08-01), John
Ashraf Nashmiya
Duncan John R.
Gilliam Frank D.
Williams Hezron E.
LandOfFree
Versatile airborne particle impaction sampler does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Versatile airborne particle impaction sampler, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Versatile airborne particle impaction sampler will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-803728