B - Operations – Transporting – 01 – L
Patent
B - Operations, Transporting
01
L
98/2
B01L 1/00 (2006.01) A01C 1/02 (2006.01) A01K 1/03 (2006.01) A01K 13/00 (2006.01) A23B 4/052 (2006.01) A23B 4/16 (2006.01)
Patent
CA 1116456
ABSTRACT OF THE INVENTION EXPOSURE CHAMBER A chamber for exposing animals, plants, or materials to air containing gases or aerosols is so constructed that catch pans for animal excrement, for example, serve to aid the uniform distribution of air throughout the chamber instead of constituting obstacles as has been the case in prior animal exposure chambers. The chamber comprises the usual imperforate top, bottom and side walls. Within the chamber, cages and their associated pans are arranged in two columns. The pans are spaced horizontally from the walls of the chamber in all directions. Corresponding pans of the two columns are also spaced horizontally from each other. Preferably the pans of one column are also spaced vertically from corresponding pans of the other column. Air is introduced into the top of the chamber and withdrawn from the bottom. The general flow of air is therefor vertical. The effect of the horizontal pans is based on the fact that a gas flowing past the edge of a flat plate that is perpendicular to the flow forms a wave on the upstream side of the plate. Air flows downwardly between the chamber walls and the outer edges of the pan. It also flows downardly between the inner edges of the pans of the two columns. It has been found that when the air carries aerosol particles, these particles are substantially uniformly distributed throughout the chamber.
346934
Hazleton Systems Inc.
Smart & Biggar
LandOfFree
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