Patent ID: 8701723

Claim:
A filler coupling for a pressurized gas receptacle designed to interact with a packaging connector in order to allow said receptacle to be filled, the filler coupling comprising a) a body defining an internal filler circuit between an upstream end designed to be connected to a packaging connector and a downstream end designed to be connected to a receptacle, the coupling comprising i) an isolation valve that can move relative to a seat between an upstream position configured to close the internal filler circuit and a downstream position configured to open the internal filler circuit, said isolation valve being configured to be capable of being moved to its upstream position by a return member, b) a dust-prevention valve upstream of the isolation valve, said dust-prevention valve comprising ii) a downstream end and being able to move relative to the body between an upstream position configured to close the upstream end of the internal filler circuit and a downstream position configured to open the internal filler circuit upstream end, said dust-prevention valve being configured to be capable of being moved to its upstream position by a return member, wherein the dust-prevention valve is capable of being moved selectively downstream either: a) in a first determined downstream position, called “contactless” position, configured to open the upstream end of the internal filler circuit, wherein the downstream end of the dust-prevention valve is configured in a position wherein the dust-prevention valve is not pushing the upstream end of the isolation valve, and wherein the upstream end of the isolation valve is capable of being pushed to its downstream position for opening the circuit by the pressurized fluid entering through the open upstream end of the internal filler circuit, or b) in a second determined downstream position called “contact” position configured to open the upstream end of the internal filler circuit wherein the downstream end of the dust-prevention valve is configured in a position wherein the dust-prevention valve pushes on an upstream end of the movable isolation valve and the internal filler circuit is in an open configuration and wherein the dust-prevention valve comprises one or more passageways adapted to guide at least a portion of the stream of fluid traveling from upstream to downstream through the body of said dust-prevention valve.