Patent ID: 7757712

Claim:
A coupling for a compressed air cylinder ( 2 ) for connecting the compressed air cylinder ( 2 ) to a coupling means ( 7 ) that can be coupled with a consumer ( 6 ), a manifold, or a filling station, especially for compressed air breathing apparatuses wherein the compressed air cylinder ( 2 ) comprises a cylinder valve ( 1 ) with a standardized fitting ( 3 ), and wherein a separate coupling part ( 12 ) that can be screwed into or onto the fitting ( 3 ) of the compressed air cylinder ( 2 ) can be coupled with the consumer ( 6 ), the manifold or filling station via connecting means ( 17 , 18 ; 8 ) provided on the coupling part ( 12 ) and the coupling means ( 7 ) which include, on the coupling part ( 12 ), spring-loaded locking means ( 20 , 21 ) that provide blow-off protection and protection from contamination in uncoupled condition, and, on the coupling means ( 7 ), spring-loaded locking elements ( 9 , 10 ) and means ( 23 , 25 ) for interlocking the connection between the coupling part ( 12 ) and coupling means ( 7 ) in coupled condition, the connecting means ( 17 , 18 ; 8 ) of the coupling part ( 12 ) including a plug ( 17 ) located in a closing ring ( 18 ) and leaving an annular clearance ( 19 ), in which annular clearance a locking ring ( 21 ) is located that in uncoupled condition is held between the plug ( 17 ) and the closing ring ( 18 ) so that a limited volumetric flow of gas can flow off when the compressed air cylinder ( 2 ) is open.