Self-sealing nozzle for a dispensing apparatus

摘要

A self-sealing nozzle for a liquid dispensing device having a valve (16) and a discharge port, the discharge port including a plug (72;120;222;258) that may be bulbous in shape, the plug being retained by a retainer (74; 122;231 ;264-267) at the end of the discharge passage leading to the port. An elastomeric seal (92;140;160;184; 234;276;292;312) has an annular inner surface that seals against the plug when liquid is not being dispensed by said valve, but expands and forms a passage around the plug when liquid is being dispensed by said valve.