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:
Oct. 18, 2016
Filed:
Feb. 12, 2014
Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v., Munich, DE;
Wulf Graehlert, Dresden, DE;
Harald Beese, Freital, DE;
Abstract
A method and an apparatus for determining the permeation rate of barrier materials, with which in a measuring chamber () which has at least two shut-off elements () for opening and closing, a concentration of at least one permeate is determined which, present as a test gas with a constant concentration in a test gas chamber (), is permeated into the measuring chamber () through a barrier element () which is arranged between the test gas chamber () and the measuring chamber () and which has a known permeable surface (A). In this respect, the permeation rate is calculated using an enriching time (tA) and using a purge time (tS) determined using a first measurement variant in a process step (i) and the course of the permeate concentration (c) determined during the purge time (tS) or using a course of the permeate concentration (c) determined using a second measurement variant in a process step (i) during a predefinable purge time (tvS) and using the predefinable purge time (tvS) and a predefinable enriching time (tvA) using an equation.