Beverage container pressurizer

Claim 1

In combination, a carbonated beverage container having an externally screw threaded neck and a screw threaded closure cap which is removed and replaced each time that carbonated beverage is poured from the container which vents the pressure in the container above the liquid level of the beverage thereby permitting the beverage to become "flat" as the carbonating agent egresses from the beverage into the void space above the liquid level of the beverage in the container even when the closure cap is replaced, a screw threaded replacement cap sealingly mounted on the threaded neck of the container in place of the existing closure cap that has been removed, said replacement cap including a passageway having a one-way check valve therein to permit entry of air under pressure to pressurize the space in the container above the liquid level of the beverage thereby reducing egress of carbonating agent from the beverage into the space above the liquid level of the beverage, and a manually operated pump including means sealingly engaged with the passageway in the replacement cap for pressurizing the interior of the beverage container through the passageway in the replacement cap past the check valve therein, whereby the pump provides means to open the check valve said pump being separable from the replacement cap to enable the pump to be utilized with various beverage containers having replacement caps thereon.