Breathing tube connecting device

A process for connecting a breathing tube connecting device, the process comprising:

• providing respirators including a first respirator having a first connecting structure and a second respirator having a second connecting structure with the first connecting structure being a different connecting structure from the second connecting structure;
• providing a breathing tube connecting device for connecting a breathing tube to at least two respirators, the breathing tube connecting device comprising a base body having an inner base body surface defining a breathing gas through duct and a jacket body, said jacket body engaging the base body in a positive-locking manner and said jacket body enclosing at least a part of the base body in a coaxial manner, whereby an end portion of said base body and an end portion of said jacket body define at least a portion of a coupling section of said breathing tube connecting device for a connection of the breathing tube to one of the at least two respirators, said base body having a breathing tube connecting end portion, said breathing tube connecting end portion being located opposite said end portion of said base body;
• and
• connecting the breathing tube connecting device to one of the first connecting structure and the second connecting structure, wherein said breathing tube is connected to said one of the at least two respirators via said breathing tube connecting device, at least a portion of said inner base body surface engaging at least a portion of said one of the first connecting structure and the second connecting structure.