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. 11, 2014
Filed:
Apr. 09, 2010
Applicants:
Vladimir Schwartz, Lexington, MA (US);
Boris Chernobrod, Santa Fe, NM (US);
Inventors:
Vladimir Schwartz, Lexington, MA (US);
Boris Chernobrod, Santa Fe, NM (US);
Assignee:
Inficon GmbH, Bad Ragaz, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01M 3/04 (2006.01); G01M 3/38 (2006.01); G01M 3/20 (2006.01);
U.S. Cl.
CPC ...
G01M 3/20 (2013.01); G01M 3/38 (2013.01);
Abstract
The leak detection device comprises a plurality of measuring cells () in whose interior the absorption of a laser beam () is influenced by the presence of tracer gas. All of said measuring cells () are connected to a host unit () via light-conducting fibers (). In the host unit (), a laser () designed for modulation and a photodetector () are arranged. Modulation of the laser radiation is preferably performed by two-tone frequency modulation. This has the effect that the fiber length cannot significantly skew the result of the measurement.