Patent ID: 8177103

Claim:
Container for carbonated liquid drink provided with a chamber ( 2 ) for containing the liquid drink, a liquid drink dispensing opening ( 13 ) for dispensing the liquid drink from said drink chamber ( 2 ), a pressure medium chamber ( 9 ) for supplying pressure medium to said drink chamber ( 2 ), which pressure medium chamber ( 9 ) has an outlet that is closed by a delivery valve ( 12 ) for delivering pressure medium, and a pressure regulating element ( 10 ) connected to said delivery valve ( 12 ) for operating said delivery valve ( 12 ), wherein said pressure regulating element ( 10 ) has a housing ( 35 ) with an end wall ( 40 ), a peripheral wall ( 36 ) and a piston ( 19 ) that can be moved in said housing along said peripheral wall ( 36 ) in a sealed manner, wherein an upper housing part ( 39 ) is formed between a side of said piston ( 19 ) that faces said end wall ( 40 ) and said end wall ( 40 ), and a lower housing part ( 37 ) that at least partially surrounds said delivery valve ( 12 ) is formed at the side of said piston ( 19 ) facing away from said end wall ( 40 ), wherein said piston ( 19 ) engages said delivery valve ( 12 ) and wherein said upper housing part ( 39 ) of said housing ( 35 ) is in fluid communication with a reference pressure source, said upper housing part ( 39 ) comprising a cylindrical wall ( 36 ) with a screw head screw thread ( 46 ) and a rotatable cap ( 45 ) that is joined to said cylindrical wall ( 36 ) by a complementary screw thread, the volume of said upper housing part ( 39 ) being variable by moving said cap ( 45 ) along said cylindrical wall ( 36 ) by selective rotation of said cap ( 45 ) for setting the internal pressure in said drink chamber, wherein said pressure medium chamber ( 9 ) is in direct fluid communication with said chamber ( 2 ) via only said delivery valve ( 12 ).