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Pressure-flow reducer for aerosol focusing devices

United States Patent

April 22, 2008
View the Complete Patent at the US Patent & Trademark Office
Lawrence Livermore National Laboratory - Visit the Industrial Partnerships Office Website
A pressure-flow reducer, and an aerosol focusing system incorporating such a pressure-flow reducer, for performing high-flow, atmosphere-pressure sampling while delivering a tightly focused particle beam in vacuum via an aerodynamic focusing lens stack. The pressure-flow reducer has an inlet nozzle for adjusting the sampling flow rate, a pressure-flow reduction region with a skimmer and pumping ports for reducing the pressure and flow to enable interfacing with low pressure, low flow aerosol focusing devices, and a relaxation chamber for slowing or stopping aerosol particles. In this manner, the pressure-flow reducer decouples pressure from flow, and enables aerosol sampling at atmospheric pressure and at rates greater than 1 liter per minute.
Gard; Eric (San Francisco, CA), Riot; Vincent (Oakland, CA), Coffee; Keith (Diablo Grande, CA), Woods; Bruce (Livermore, CA), Tobias; Herbert (Kensington, CA), Birch; Jim (Albany, CA), Weisgraber; Todd (Brentwood, CA)
Lawrence Livermore National Security, LLC (Livermore, CA)
11/ 471,093
June 19, 2006
The United States Government has rights in this invention pursuant to Contract No. W-7405-ENG-48 between the United States Department of Energy and the University of California for the operation of Lawrence Livermore National Laboratory.