Patent ID: 8955718
Filing Date: 2015-02-17
Classification: A47K,B05B,F04B

Abstract:
1. A refill unit having a lost motion foam pump comprising: a container for holding a foamable liquid; a pump housing connected to the container; a liquid chamber; a liquid piston movable in the liquid chamber; an air chamber; an air piston movable in the air chamber; the air piston linked to the liquid piston; a lost motion connector linked to the air piston or the liquid piston; the lost motion connector having an engagement member for connecting to an actuator of a foam dispenser; wherein movement of the lost motion connector in a first direction moves the liquid and air pistons to contract the liquid chamber and the air chamber; wherein movement of the lost motion connector a first distance in a second direction results in lost motion between the actuator and the liquid piston and the air piston; and wherein continued movement of the lost motion connector a second distance in the second direction moves the liquid piston and the air piston and expands the liquid and air chambers.