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:
Apr. 22, 2003
Filed:
Apr. 04, 2002
Nippon Sanso Corporation, Tokyo, JP;
Abstract
There is provided a gas analyzing apparatus capable of minimizing gas remaining by integrating gas switching apparatuses into one and capable of analyzing impurities of ppb level to sub-ppb level contained in various kinds of high-purity gases efficiently and accurately. The gas analyzing apparatus comprises an analyzer introduction passage for introducing a sample gas supplied from a sample gas source into an analyzer via an analyzer introduction valve V; a separator introduction passage diverging from a first side passage of the analyzer introduction valve V for introducing a sample gas into a separator via a separator introduction valve V; a separator flowing-out passage for introducing the sample gas flowing out from the separator into a second side passage of the analyzer introduction valve V via a separator flowing-out valve V; and a gas switching apparatus to be such formed that when the analyzer introduction valve V is opened, the separator introduction valve V and the separator flowing-out valve V are connectively operated to be closed, and when the analyzer introduction valve V is closed, the separator introduction valve V and the separator flowing-out valve V are connectively operated to be opened.