The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 22, 2011
Filed:
Mar. 20, 2008
Eric Gard, San Francisco, CA (US);
Vincent Riot, Oakland, CA (US);
Keith Coffee, Diablo Grande, CA (US);
Bruce Woods, Livermore, CA (US);
Herbert Tobias, Kensington, CA (US);
Jim Birch, Albany, CA (US);
Todd Weisgraber, Brentwood, CA (US);
Eric Gard, San Francisco, CA (US);
Vincent Riot, Oakland, CA (US);
Keith Coffee, Diablo Grande, CA (US);
Bruce Woods, Livermore, CA (US);
Herbert Tobias, Kensington, CA (US);
Jim Birch, Albany, CA (US);
Todd Weisgraber, Brentwood, CA (US);
Lawrence Livermore National Security, LLC, Livermore, CA (US);
Abstract
A computerized method and system for designing an aerodynamic focusing lens stack, using input from a designer related to, for example, particle size range to be considered, characteristics of the gas to be flowed through the system, the upstream temperature and pressure at the top of a first focusing lens, the flow rate through the aerodynamic focusing lens stack equivalent at atmosphere pressure; and a Stokes number range. Based on the design parameters, the method and system determines the total number of focusing lenses and their respective orifice diameters required to focus the particle size range to be considered, by first calculating for the orifice diameter of the first focusing lens in the Stokes formula, and then using that value to determine, in iterative fashion, intermediate flow values which are themselves used to determine the orifice diameters of each succeeding focusing lens in the stack design, with the results being output to a designer. In addition, the Reynolds numbers associated with each focusing lens as well as exit nozzle size may also be determined to enhance the stack design.