Improved table top dispenser

An upright foam dispenser comprising:

• a reservoir;
• a foam pump located above the reservoir;
• the foam pump comprising;
• a foam generator;
• a liquid pump chamber;
• a liquid pump chamber inlet;
• a liquid pump chamber outlet;
• the liquid pump chamber outlet located below the liquid pump chamber inlet;
• a passageway extending from the liquid pump chamber outlet to the foam generator;
• an air pump chamber;
• an opening located in the air pump chamber placing the air pump chamber in fluid communication with the central passageway;
• wherein the opening is located proximate the top of the air pump chamber;
• wherein the area above the opening is an upper air pump chamber portion of the air pump chamber and wherein the area below the opening is a lower air pump chamber portion;
• wherein the volume of the upper air pump chamber portion is less than about 15 percent of the volume of the lower air pump chamber portion;
• a dip tube extending from the liquid pump chamber inlet to proximate the bottom of the reservoir;
• and
• an outlet nozzle located above the pump;
• wherein the pump is configured to draw air and residual liquid through the foam generator and outlet nozzle into the air pump chamber;
• wherein the residual liquid settles at the bottom of the air pump chamber;
• wherein the air pump chamber is configured so that residual liquid builds up during operation of the foam pump and remains in the bottom of the air pump chamber after a selected number of operations of the foam pump.

An upright foam dispenser comprising:

• a reservoir;
• a foam pump located above the reservoir;
• the foam pump comprising;
• a foam generator;
• a liquid pump chamber;
• a liquid pump chamber inlet;
• a liquid pump chamber outlet;
• a passageway extending upward from the liquid pump chamber outlet to the foam generator;
• an air pump chamber;
• an opening located in the air pump chamber placing the air pump chamber in fluid communication with the central passageway;
• an upper air pump chamber portion located above the opening;
• a lower air pump chamber portion located below the opening;
• wherein the lower air pump chamber portion has a maximum diameter that is greater than a maximum diameter of the upper air pump chamber portion;
• a dip tube extending from the liquid pump chamber inlet to proximate the bottom of the reservoir;
• and
• an outlet nozzle;
• wherein the pump is configured to draw air and residual liquid through the foam generator and outlet nozzle into the air pump chamber;
• wherein the residual liquid settles in a bottom of the lower air pump chamber portion;
• wherein the air pump chamber is configured so that during operation of the foam pump, residual liquid builds up and remains in the bottom of the lower air pump chamber portion.