Patent ID: 7690276
Filing Date: 2010-04-06
Classification: G01N

Abstract:
1. An apparatus for redirecting a flow of aerosol-containing air, comprising: an air intake disposed within the flow of aerosol-containing air; means for redirecting a portion of the flow of aerosol-containing air into the air intake; and a sampling tube having an opening for receiving aerosol-containing air disposed within the air intake; wherein the means for redirecting a portion of the flow of aerosol-containing air into the air take comprises: a source of pressurized gas; and means for injecting the pressurized gas into the air intake so as to cause a flow of the portion of aerosol-containing air in the air intake; wherein the means for injecting the pressurized gas into the air intake comprises: an annular conduit within the air intake for directing the pressurized gas downstream of the opening of the sampling tube; wherein air intake comprises: a converging inlet portion, an intermediate cylindrical portion and a diverging portion; and the annular conduit is disposed outside the intermediate cylindrical portion so that an inlet of the annular conduit receives the pressurized gas and an outlet of the annular conduit directs the pressurized gas past the opening of the sampling tube; wherein the air intake has a longitudinal axis extending therethrough and is circular thereabout; and wherein the sampling tube has an inlet opening disposed within the cylindrical portion of the air intake.