US 12,458,819 B2
Arrangement for breathing apparatus, and breathing apparatus
Pierre Bühlmann, Lidingö (SE); Anders Johnsson, Spånga (SE); and Lars Liljeberg, Tällberg (SE)
Assigned to INTERSPIRO AB, Täby (SE)
Appl. No. 17/629,834
Filed by INTERSPIRO AB, Täby (SE)
PCT Filed Jul. 9, 2020, PCT No. PCT/EP2020/069419
§ 371(c)(1), (2) Date Jan. 25, 2022,
PCT Pub. No. WO2021/023466, PCT Pub. Date Feb. 11, 2021.
Claims priority of application No. 1950911-6 (SE), filed on Aug. 2, 2019.
Prior Publication US 2022/0273968 A1, Sep. 1, 2022
Int. Cl. A62B 9/02 (2006.01); B63C 11/22 (2006.01)
CPC A62B 9/02 (2013.01) [B63C 11/2236 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An arrangement for a breathing apparatus, the arrangement comprising:
a breathing device;
a primary connection point for fluid communication with a primary container;
a secondary connection point for fluid communication with a secondary container;
a primary side arranged between the primary connection point and the breathing device;
a secondary side arranged between the secondary connection point and the breathing device;
a first valve arranged between the primary connection point and the secondary connection point, the first valve being arranged to automatically close a first fluid connection between the primary connection point and the secondary connection point when a secondary pressure in the secondary side decreases below a first pressure threshold such that the first valve operates as a one-way valve by (i) when in an open configuration, providing pressurized gas from the secondary connection point to the primary connection point, and (ii) when in a closed configuration, inhibiting pressurized gas from flowing through the first valve;
a second valve arranged on the secondary side, the second valve being arranged to automatically establish a second fluid connection between the secondary connection point and the breathing device when a primary pressure in the primary side decreases below a second pressure threshold;
a primary shut-off valve arranged between the primary container and the primary connection point; and
a secondary shut-off valve arranged between the secondary container and the secondary connection point.