Abstract: A cap member for fitment over a gas outlet nozzle having a plurality of serrations on the exterior thereof, is disclosed. The cap member comprises a peripherally disposed main body portion spanning between an open first end and a closed second end. The main body portion has an outer surface defining the periphery of the cap member and an inner surface defining a nozzle receiving recess. A lock member having a arcuately shaped central portion terminating in opposed outwardly projecting first and second end tabs having a key-receiving gap therebetween is retained within an annular slot within the nozzle receiving recess.

Abstract: A cap member for fitment over a gas outlet nozzle having a plurality of serrations on the exterior thereof, is disclosed. The cap member comprises a peripherally disposed main body portion having an inner surface and an outer surface, the inner surface defining a nozzle receiving recess, an open first end, a generally closed second end, and a lock member. The lock member has a projecting lock portion movable between a first locking position and a second unlocking position. When the projecting lock portion is in the first locking position, the projecting lock portion projects into the nozzle receiving recess so as to be in interfering relation with one of the plurality of serrations on the exterior of the gas outlet nozzle, so as to thereby lock the cap member in place and preclude the cap member from being removed from the nozzle.