Patent ID: 9278844
Filing Date: 2016-03-08
CPC Classification: B67D,F16K,F17C,Y10T

Claim Text:
1. A method for withdrawing a pressurized gas from a receptacle comprising a tap, the tap comprising a filler/withdrawal coupling for a pressurized gas receptacle designed to interact with a packaging connector in order to allow said receptacle to be filled with pressurized gas or for withdrawal of pressurized gas from the receptacle, the filler/withdrawal 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 b) a dust-prevention valve upstream of the isolation valve, said dust-prevention valve comprising 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, 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, and wherein the method comprises a) a first step of moving the dust-prevention valve downstream in order to open the upstream end of the circuit via a mechanical actuation and/or a fluidic actuation carried out by the packaging connector and b) a second step of moving the isolation valve to a downstream opening position via a mechanical actuation carried out by the dust-prevention valve and/or via a fluidic actuation carried out by the gas delivered by the packaging connector.