Bifurcated stem foam pump

A refill unit for a refillable foam dispenser, the refillable foam dispenser having an air compressor attached thereto, the refill unit comprising:

• a container for containing a foamable liquid;
• a liquid pump housing connected to the container;
• the liquid pump housing including a liquid reservoir;
• an inlet valve located upstream of the liquid reservoir;
• an outlet valve located downstream of the liquid reservoir;
• an air inlet opening through the liquid pump housing;
• a foaming screen located at least partially within the liquid pump housing, and
• a foam dispensing nozzle secured to the liquid pump housing;
• the liquid pump housing configured to releasably mate with an air compressor that is not part of the refill unit but is secured to a foam pump dispenser housing, and the refill unit is configured to be removed from the foam dispenser without removing the air compressor from the foam dispenser;
• wherein the air inlet passage is in fluid communication with the open atmosphere without being in fluid communication with an air compressor prior to being installed in a foam dispenser and the air inlet passage is in fluid communication with an air compressor when the refill unit is placed in the foam dispenser.

A refill unit for a refillable foam pump dispenser comprising:

• a container for containing a foamable liquid;
• a liquid pump housing connected to the container;
• a liquid reservoir located within the liquid pump housing;
• an inlet valve located upstream of the liquid reservoir;
• an outlet valve located downstream of the liquid reservoir;
• a foam screen located downstream of the liquid reservoir;
• a foam outlet nozzle located downstream of the foam screen;
• and
• an air inlet through the liquid pump housing;
• wherein the inlet is in fluid communication with the atmosphere without being in fluid communication with an air compressor prior to installation of the refill unit in a refillable foam dispenser, and the inlet is in fluid communication with an air compressor after being installed in the refillable foam dispenser.