Patent ID: 8360054

Claim:
A device comprising a demand valve for delivering breathable gas to a diver and at least one fluidic connector that can be selectively connected to the demand valve, the demand valve comprising a breathable gas supply inlet, the fluidic connector fastened removably at the supply inlet to carry breathable gas into the valve, the supply inlet of the demand valve and the fluidic connector comprising complementary respective catching members forming a removable fastening system, the complementary respective catching members comprising a screw thread and tapped thread system, wherein the demand valve and the fluidic connector comprise a blocking device for selectively blocking the connector on the demand valve when the connector is fastened to the demand valve via the catching members, the blocking device comprising a moving locking piece situated on the fluidic connector or on the demand valve, and an end stop situated on the demand valve or on the fluidic connector, the locking piece being able to be moved selectively between a first position of collaboration with the end stop corresponding to a configuration of blocking relative rotational movement between the demand valve and the fluidic connector and a second position of non-collaboration with the end stop corresponding to a position of unblocking the relative rotational movement between the demand valve and the fluidic connector, the locking piece being urged via a blocking device return member towards the first position in order automatically to block the connection of the fluidic connector to the demand valve when the seat retainer is fastened to the demand valve via the catching members.