Liquid dispenser

Liquid dispenser for dispensing a carbonated liquid from a container by tilting the container to a pouring position, the liquid dispenser comprising:

• a compartment extending upwardly from a neck portion of said container, defining an opening to the atmosphere between said compartment and said neck portion;
• a container sealing region located between said neck portion and said opening;
• a compartment sealing region located between said compartment and said opening;
• and
• a valve, movable within said compartment, from a closed position pressed toward said neck portion, and to an open position, away from said neck portion, said valve comprising:
• a first surface facing said compartment;
• a second surface facing said opening;
• a first valve sealing region to match said container sealing region, for preventing passage of fluids between said neck portion and said opening, when said valve is in said closed position;
• a second valve sealing region to match said compartment sealing region, for preventing passage of fluids between said compartment and said opening, when said valve is in said closed position;
• and
• a channel extending from said neck portion to said compartment, said channel permanently enabling passage of fluid from said neck portion to said compartment;
• wherein when said container is in a generally upright position, said valve is positioned in said closed position, said closed position being characterized by a first sum of a surface force due to a pressure of a gas of said carbonated liquid acting on said first surface, and a valve weight of said valve, being greater than an atmospheric force component opposite to a direction of said first sum, due to the atmospheric pressure acting on said second surface, said direction being substantially parallel with a longitudinal axis of said container and pointing toward a bottom of said container, whereby said opening is closed and said gas remains within said container, and
• wherein when said container is in a pouring position, a second sum of said valve weight component opposite to said direction, said atmospheric force component opposite to said direction, and a liquid weight component of a weight of said carbonated liquid opposite to said direction, is greater than said surface force, thereby causing said valve to move from said closed position toward said open position.

Liquid dispenser for dispensing a carbonated liquid from a container by tilting the container to a pouring position, the liquid dispenser comprising:

• a compartment extending upwardly from a neck portion of said container, defining an opening to the atmosphere between said compartment and said neck portion;
• a container sealing region located between said neck portion and said opening;
• a compartment sealing region located between said compartment and said opening;
• and
• a valve, movable within said compartment, from a closed position pressed toward said neck portion, and to an open position, away from said neck portion, said valve comprising:
• a first surface facing said compartment;
• a second surface facing said opening;
• a first valve sealing region to match said container sealing region, for preventing passage of fluids between said neck portion and said opening, when said valve is in said closed position;
• a second valve sealing region to match said compartment sealing region, for preventing passage of fluids between said compartment and said opening, when said valve is in said closed position;
• and
• a channel extending from said neck portion to said compartment, said channel permanently enabling passage of fluid from said neck portion to said compartment;
• wherein said valve is in a form of a prism whose lateral face tapers from a base into an apex, said first surface being located at said base, said second surface being located on said lateral face,
• wherein said second surface includes said first valve sealing region and said second valve sealing region, and
• wherein said base is located within said compartment, an apex of said prism is located within said neck portion.