BACKFLOW PREVENTION DEVICE WITH COLLAPSIBLE ELEMENT WITHIN A VENTILATION DUCT AND USE OF A COLLAPSABLE ELEMENT WITHIN A VENTILATION DUCT - Patent 2718632

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EP 2 718 632 A1

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(43)	Date of publication:
	16.04.2014 Bulletin 2014/16

(21)	Application number: 12723508.3

(22)	Date of filing: 25.05.2012

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International Patent Classification (IPC):

F24F 13/14^(2006.01)

A62C 2/06^(2006.01)

(86)	International application number:
	PCT/EP2012/059872

(87)	International publication number:
	WO 2012/160197 (29.11.2012 Gazette 2012/48)

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

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Priority:

25.05.2011 SE 1150485
13.02.2012 SE 1250115
16.03.2012 SE 1250254

(71)	Applicant: E.K.O. Ventilationsdetaljer AB
	235 32 Vellinge (SE)

(72)	Inventors:
	MILLRUD, Christer S-21614 Limhamn (SE) AUGUSTSSON, Henrik S-211 19 Malmö (SE) DREWERT, Ulf S-111 24 Stockholm (SE) Braadli, Gard S-23631 Höllviken (SE)

(74)	Representative: Ström & Gulliksson AB
	Box 4188 203 13 Malmö 203 13 Malmö (SE)

(54)	BACKFLOW PREVENTION DEVICE WITH COLLAPSIBLE ELEMENT WITHIN A VENTILATION DUCT AND USE OF A COLLAPSABLE ELEMENT WITHIN A VENTILATION DUCT