Appliance for making an aerated beverage

摘要

The appliance comprises a casing (10) in which is mounted a pressurized container (12) of carbon dioxide which is controlled by a manually operable valve, the operation of which is by a finger actuable lever (26,27). A nozzle (18) is connected to the valve to receive carbon dioxide therefrom and inject it into water in a bottle when the bottle is mounted with the nozzle immersed in the water. A stopper (22) which closes the neck of the bottle when so mounted carries an annular flexible membrane (23) which abuts the upper end of the stem of the nozzle. An overpressure safety valve (42,44,46) is provided in communication (48) which the space (20) above the membrane (23), the latter serving to prevent water reaching the valve and assisting in forcing the bottle away from the stopper after aeration is complete.