PULL-ACTIVATED FOAM PUMPS, DISPENSERS AND REFILL UNITS

摘要

Foam dispenser pumps and refill units are disclosed herein. A refill unit (10) comprises a container (12) holding a supply of foamable liquid and a foam pump (100) connected to the container. The pump incorporates a valve arrangement to move liquid through the pump and to create the foam. The liquid foam pump may include a housing (104) and a valve stem (110) that moves in two directions. The valve stem has an inlet liquid pathway (130) and an outlet liquid pathway (130) to convey liquid to a mixing chamber (158). A moveable valve body (118) is movable by the valve stem in a first direction to move the valve body to the first position to open a liquid inlet pathway (fig. 1), and moveable in a second direction to move the valve body to the second position to open the outlet liquid pathway (fig. 2).