Sodastream Limited

Guy Hugh Gilbey

A portable carbonating apparatus of the type comprising a pressure vessel and a header tank has a bottom inlet and a top outlet controlled by respective valve pistons which are rigidly connected together by a connecting rod. The pistons have equal areas exposed within the pressure vessel, so as to be pressure balanced at all times. The top valve piston also acts to control opening and closing of a venting port to ensure venting of pressure from a head space during initial opening movement of the valves. The header tank is self-valved and is detachable from the apparatus.

Aerating apparatus

Apparatus for preparing carbonated beverages has a main body providing a receptacle for a CO.sub.2 cylinder and a hingedly mounted aerating head carrying a tube connected with the cylinder through a manually operated valve and a cylindrical shield coaxial with the tube for receiving a bottle containing the liquid to be carbonated. The shield is accessible for insertion or removal of a bottle only when swung away from the main body. In the operative position of the aerating head, a platform on the main body can be raised by a lever-operated cam to press the neck of the received bottle against a resilient nozzle on the aerating head. A safety valve linked with the cam releases excess pressure in the charged bottle when the platform is lowered.

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Empingham, United Kingdom

Guy Hugh Gilbey