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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 b

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.

대표청구항 ▼

An apparatus for carbonating water, comprising a pressure vessel and a header tank containing a quantity of fresh water, said vessel having a bottom inlet and an outlet in an upper region thereof, a water feed tube connecting said tank into said vessel, discharge means communicating with said outlet

An apparatus for carbonating water, comprising a pressure vessel and a header tank containing a quantity of fresh water, said vessel having a bottom inlet and an outlet in an upper region thereof, a water feed tube connecting said tank into said vessel, discharge means communicating with said outlet through which carbonated water is discharged from said vessel, an injection nozzle extending into said vessel for admitting CO2 from a pressurized CO2 supply into said vessel, said vessel defining a head space in said upper region, said inlet and said outlet being respectively defined by inlet and outlet axial valve bores, spaced inlet and outlet valve pistons being rigidly interconnected to form a unitary plunger, said pistons respectively having opposed equal pressure surfaces facing one another and being directly exposed to the interior of said vessel whereby said plunger is substantially pressure balanced, and said pistons respectively being disposed for sliding movement in said bores for opening and closing said inlet and said outlet, pressure release valve means at said upper region for connecting said head space to atmosphere, means for admitting CO2 under pressure to the interior of said vessel and manually operable means for first releasing pressure from said head space by operating said release valve means and then discharging carbonated water through said discharge means by opening said inlet and outlet pistons in unison.