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:
May. 08, 2012
Filed:
Sep. 10, 2007
Applicants:
Daniel Wetzig, Cologne, DE;
Norbert Rolff, Horrem, DE;
Inventors:
Daniel Wetzig, Cologne, DE;
Norbert Rolff, Horrem, DE;
Assignee:
Inficon GmbH, , DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01M 3/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
To achieve a large measurement range from small up to larger leakage rates, a switchover from normal operation to gross operation occurs. In gross operation, the sucked-in gas flow is separated by different throttles, wherein the throttle that leads to the test gas sensor has a low flow rate. This manner of operation prevents a too large quantity of test gas from reaching the sensor surface and contaminating the sensor. In another alternative, in gross operation the test gas flows only across a part of the sensor surface. The other part is flushed.