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:
Dec. 24, 2002
Filed:
Jun. 01, 2001
Frederic Schildmeyer, Portland, OR (US);
Pacific Scientific Instruments Company, Grants Pass, OR (US);
Abstract
A condensation nucleus counter (CNC) device implemented with a multi-directional fluid flow system is configured in a compact, conical geometry. A saturation region includes an inlet that delivers into an annular pool a sample stream of air containing small-diameter particles. The stream of air flows out and expands radially from the inlet and mixes with a working vapor to become saturated in the saturation region. The saturated fluid mixture then flows to a condensation region defined by spaced-apart inner and outer radially converging walls having a conical geometry, thereby forming an annular flow volume of decreasing cross sectional area in the direction of fluid flow to the outlet of the CNC device. The working vapor condenses on the small-diameter particles to enlarge their sizes with less tendency to condense on the inner walls of the condensation region.