Bottle cap and dispenser

A pressurizing cap which may be readily attached and detached from the discharge neck of a bottle of carbonated liquid, said cap comprising:

• a housing having a first chamber proximate an upper end thereof and a skirt portion at an opposite end thereof for detachably engaging said neck, said first chamber for retaining a pressurized canister of innoxious gas;
• a second chamber within said housing;
• a first conduit from said first chamber to said second chamber;
• a second conduit from said second chamber to said neck portion;
• and
• valve means for selectively connecting said first conduit to said second conduit whereby said gas is released into said bottle, said valve means comprising
• a piston slidably coupled within said second chamber and capable of being maneuvered between a first position wherein communication between said first and second conduits is blocked and a second position wherein gas from said first conduit will flow through said second conduit;
• a piston rod fixedly coupled to said piston;
• spring means coupled within said chamber for normally biasing said piston into said first position;
• and
• an actuator movably coupled to said housing and engaging said piston rod for moving said piston to said second position;
• liquid discharge means extending from the interior of said bottle to the exterior of said housing, said liquid discharge means comprising
• a third chamber;
• a first tube communicating at one end thereof with said third chamber and having an opposite end extending into said liquid;
• a third conduit extending from said third chamber and communicating with an opening in said housing;
• nozzle means extending from said opening to the exterior of said housing;
• and
• regulating means in said third chamber for regulating the volume of liquid passing through said liquid discharge means.