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. 19, 2016
Filed:
Jul. 20, 2011
Applicant:
Ulrich Döbler, Wermelskirchen, DE;
Inventor:
Ulrich Döbler, Wermelskirchen, DE;
Assignee:
Inficon GMBH, Köln, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01M 3/26 (2006.01); F04D 19/04 (2006.01); G01M 3/20 (2006.01); F04D 27/02 (2006.01);
U.S. Cl.
CPC ...
G01M 3/26 (2013.01); F04D 19/046 (2013.01); F04D 27/0269 (2013.01); G01M 3/205 (2013.01);
Abstract
The leak detection appliance has a test inlet to which a test chamber containing the test specimen can be connected. A high-vacuum pump produces a high vacuum in a test gas detector. A backing pump contains two pump stages. In order to evacuate the test chamber, the pump stages are operated in parallel mode, with their suction capabilities being added. When the necessary vacuum has been achieved, the pump stages are operated in series in order to produce the necessary high vacuum which is required for high detection sensitivity on the test gas detector.