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:
Jan. 24, 2006
Filed:
Mar. 28, 2002
Alan G. Wiseman, Wheelers Hill, AU;
Alan G. Wiseman, Wheelers Hill, AU;
Varian Australia PTY Ltd., Mulgrave, AU;
Abstract
A torch for producing an inductively coupled or microwave induced plasma for use in spectrochemical analysis. The torch includes a central tube () for conveying a flow of a gas carrying sample aerosol to a plasma () produced in the torch. The tube () has an inlet () and an outlet () of smaller size than the inlet and is shaped to deliver a substantially laminar flow of the gas at the outlet (). The tube () is tapered along at least a substantial portion of its length such that its cross-section area gradually and smoothly reduces towards its outlet () along at least a substantial portion of its length. It has been found that such a tapered tube is resistant to obstruction by salts deposited from samples containing high levels of dissolved solids.