US 12,285,569 B2
Carbon dioxide absorber for a rebreather
Lorenz Krüger, Lübeck (DE); Christopher Libicher, Lübeck (DE); and Tim Weber, Lübeck (DE)
Assigned to DRÄGER SAFETY AG & CO. KGAA, Lübeck (DE)
Filed by Dräger Safety AG & Co. KGaA, Lübeck (DE)
Filed on Jul. 6, 2021, as Appl. No. 17/368,009.
Claims priority of application No. 102020117894.8 (DE), filed on Jul. 7, 2020.
Prior Publication US 2022/0008686 A1, Jan. 13, 2022
Int. Cl. A61M 16/22 (2006.01); A62B 19/00 (2006.01)
CPC A61M 16/22 (2013.01) [A62B 19/00 (2013.01); A61M 2205/3606 (2013.01); A61M 2205/583 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A carbon dioxide absorber comprising:
an inlet;
an outlet, the inlet and the outlet being connectable to a closed-circuit breathing apparatus;
a flow duct gas-tight connecting the inlet and the outlet;
carbon dioxide absorbing material arranged in the flow duct to absorb at least some carbon dioxide contained in a breathing gas stream sent through the carbon dioxide absorbing material;
a housing enclosing the flow duct in at least some areas;
a window element arranged at the housing;
a display element arranged movably in the flow duct, the display element being visible from outside of the housing through the window element and/or configured such that radiation reflected by the display element exits to the outside of the housing through the window element, wherein a distance between the window element and the display element is configured to vary as a function of a quantity of carbon dioxide-absorbing material arranged in the flow duct; and
an optical element through which a light beam entering the window element from the outside from a surrounding area is configured to be deflected divergently from a central axis extending from the window element to the display element.