Patent ID: 11883696
Assignee: DRäGER SAFETY AG & CO. KGAA
Field: Other consumer goods (Other fields)
Classification: CPC A | IPC A

Claim 7:
8. A closed-circuit breathing apparatus comprising:
at least one respirator component;
a breathing tube with a plurality of corrugations and a counter-fastening section; and
closed-circuit breathing apparatus housing comprising:
a housing mount; and
a housing cover, the housing mount and the cover cooperating to cover a housing interior, wherein:
the housing mount comprises a first partial section of at least one passage opening for passage of a breathing tube into the housing interior;
the housing cover comprises a second partial section of said at least one passage opening;
the housing mount or the housing cover or both the housing mount and the housing cover comprises a fastening section for mechanical fastening to the counter-fastening section of the breathing tube, which the breathing tube is guided through the at least one passage opening;
the fastening section is defined by an extent of both the housing mount and the housing cover;
the at least one respirator component is mounted in the housing interior, the at least one respirator component is fluid-communicatingly connected to the breathing tube;
the breathing tube comprises a sealing section at one end of the breathing tube configured to fluid-tightly connect the breathing tube to the at least one respirator component;
the at least one respirator component comprises an external groove configured to receive an interior rib of the sealing section at the one end of the breathing tube;
a fastening device enclosing the breathing tube;
the fastening device comprises a union nut, which the union nut is arranged over the interior rib of the sealing section and the external groove of the at least one respirator and cooperates with the sealing section to provide a fluid-tight connection of the breathing tube to the at least one respirator component in the housing interior;
the fastening section is located adjacent to the sealing section and at least one of the plurality of corrugations;
the counter-fastening section of the breathing tube is fastened to the fastening section of the housing and the fastening section is positioned within the counter-fastening section; and
the counter-fastening section is defined by a groove that is formed between two ridges of the plurality of corrugations.