US 9,808,657 B2
Directional valve and breathing mask with a directional valve
Michael Rosert, Timmendorfer Strand (DE); Dennis Leske, Eutin (DE); Harald Heyer, Klein Wesenberg (DE); and Thomas Pancur, Altenholz (DE)
Assigned to Dräger Safety AG & Co. KGaA, Lübeck (DE)
Filed by Michael Rosert, Timmendorfer Strand (DE); Dennis Leske, Eutin (DE); Harald Heyer, Klein Wesenberg (DE); and Thomas Pancur, Altenholz (DE)
Filed on May 9, 2012, as Appl. No. 13/467,516.
Claims priority of application No. 10 2011 113 716 (DE), filed on Sep. 17, 2011.
Prior Publication US 2013/0068232 A1, Mar. 21, 2013
Int. Cl. A62B 18/00 (2006.01); A62B 18/10 (2006.01)
CPC A62B 18/10 (2013.01) 17 Claims
OG exemplary drawing
 
14. A breathing mask with a directional valve, the breathing mask comprising:
a valve seat having a sealing surface, said valve seat defining an opening;
a flexible valve membrane arranged on said valve seat, said flexible valve membrane having a circumference, a fixed portion and a center, said center including a center point of said flexible valve membrane;
a fixing lug eccentrically arranged on said valve membrane, said fixing lug fixing said fixed portion of said valve membrane relative to said valve seat, said fixing lug being dimensioned for fixing the valve membrane against said sealing surface of said valve seat during absence of flow through the directional valve, said valve seat and said fixing lug being dimensioned to move said circumference and said center point of said valve membrane away from said valve seat in one direction during flow through said opening in said one direction, wherein a size of an eccentric offset of said fixed portion is selected to be such that said valve membrane lifts off over an entire circumference of said sealing surface during flow in said one direction, said fixing lug having a plurality of fixing points to fix said valve membrane to said fixing lug, said fixing lug being arranged on a side of said valve membrane diametrically opposite said valve seat, said plurality of fixing points of said fixing lug being arranged in Y-shape in a plane parallel to said valve membrane.