Patent ID: 7784646
Filing Date: 2010-08-31
Classification: A61M,B05B,G01F

Abstract:
1. A manually operable metered dispenser comprising: a housing including a reciprocable piston drive stem including an inlet opening at a first end thereof, a floating piston disposed at a second end thereof, and a passage between said first and second ends; an inlet valve provided adjacent said first end for permitting entry of liquid product into said passage, and an outlet valve provided adjacent said second end; a cocking mechanism reciprocally disposed substantially within said housing, and biased in a first direction; and a loading mechanism biased in said first direction, movable in a second generally opposite direction by said cocking mechanism, and engageable with said piston drive stem to move said piston drive stem in said second direction, said loading mechanism being further engageable with at least one stop provided in said housing, wherein when said cocking mechanism is moved from an initial rest position toward said second direction, said cocking mechanism moves said loading mechanism and along therewith said piston drive stem in said second direction, further, during movement of said loading mechanism in said second direction, said loading mechanism engages said stop, and during continued movement of said cocking mechanism in said second direction, said loading mechanism is disengaged from said stop to project in said first direction by said loading mechanism bias, and along therewith, project said piston drive stem in said first direction to dispense a metered dose of liquid product through a discharge orifice provided adjacent said second end; and, wherein said dispenser is connectable to a pressurized storage container including a sealed chamber defined by a container wall, an upper surface including said inlet valve and a lower surface including an externally threaded piston engageable with complementary internal threads in said container for pressurizing liquid disposed within said sealed chamber upon rotation of said piston.