Coupling for a container valve

Abstract

A coupling serving for connecting a double valve on a pressure container with a content of pressure gas, such as CO , and a liquid, such as beer, to a pressure-gas source and a tap for drawing the liquid respectively. The valve comprises a blockable gas and liquid passage respectively, and the coupling comprises a housing for coaxial mounting on an upper flange on the valve, a slide which is placed in the housing and which can be displaced by means of a hand grip between an upper position where the valve is closed and a lower position where the valve is open; an elastomeric sleeve secured onto the slide and forming sealing between the slide and the valve flange in the mounted position of the coupling; a mainly tubular plunger secured in the slide; and a gas chamber formed between the plunger, the sleeve, and an inner wall in the slide. The plunger serves to open the valve in the lower position of the slide so that connection is made between the liquid passage of the valve and a liquid outlet on the slide via the chamber of the plunger, and connection is made between the gas passage of the valve and a gas outlet on the slide via the gas chamber. On the plunger is a seat for a sealing ring made in one piece with the sleeve which furthermore is arranged in such a way that the sealing ring is lifted free of the seat in the mounted condition of the coupling, and abuts against the seat in the dismantled condition of the coupling. This structure is simple and inexpensive and provides a better security against gas outflow when the coupling is dismantled than known so far.