continued from part 1 - Controller General of Patents, Designs, and ...

(12) PATENT APPLICATION PUBLICATION (21) Application No.6593/DELNP/2008 A
(19) INDIA
(22) Date of filing of Application :29/07/2008 (43) Publication Date : 24/10/2008
(54) Title of the invention : METHOD FOR DETERMINING THE AIR TIGHTNESS OF ENCLOSED SPACES
(51) International classification :A62C 39/00 (71)Name of Applicant :
(31) Priority Document No :06122596.7
1)AMRONA AG
(32) Priority Date :19/10/2006
Address of Applicant :UNTERMULI 7, CH-6302 ZUG,
(33) Name of priority country
:EUROPEAN
UNION
SWITZERLAND. Switzerland
(72)Name of Inventor :
(86) International Application No :PCT/EP2007/058137 1)WAGNER, ERNST-WERNER
Filing Date
:06/08/2007
(87) International Publication No :WO 2008/046675
(61) Patent of Addition to Application
Number
Filing Date
:NA
:NA
(62) Divisional to Application Number :NA
Filing Date
:NA
(57) Abstract :
This invention relates to a method by means of which it is possible, with highest possible precision and without any major expense, to
determine the air tightness of an enclosed space, such space being . particularly well suited to the use of the inert-gas fire
extinguishing technology described above. Specifically, it introduces a method which, on demand and in effective yet easy-toimplement
fashion, permits at any time the updated determination of the existing air tightness of the enclosed space without requiring
a complex test series. To that effect, the first step according to the invention is to define a concentration gradient between the internal
air atmosphere of an enclosed space and the ambient air atmosphere by setting the physical concentration of at least one constituent
component of the space-internal air atmosphere, in particular of oxygen, at a value that differs from the physical concentration value
of that minimum of one corresponding component in the ambient air atmosphere. This is followed by a determination of the
concentration change rate in that, in the space-internal air atmosphere, the time-based change of the physical concentration of the
minimum of one constituent component is measured. Finally, taking into account the previously determined concentration change rate,
the air-tightness value of the enclosed space is calculated.
No. of Pages : 31 No. of Claims : 16
The Patent Office Journal 24/10/2008 26031