Patent ID: 8047406

Claim:
A manually operable metered dispenser comprising: (a) a housing having a first end, a second end, at least one sidewall, and a reciprocable frame member, said reciprocable frame member having a push-button connected thereto at said first end, said reciprocable frame member and said push-button being biased in a first direction; (b) said housing being connected to a pressurized storage container, said pressurized storage container including a sealed chamber defined by a container wall, a piston and pressurizing means for pressurizing liquid disposed within said sealed chamber; (c) an inlet valve provided adjacent said second end for permitting entry of liquid product into a metering chamber defined by a cavity in said reciprocable frame member; and (d) a nozzle connected to said housing and including a discharge orifice located between said push-button and said inlet valve, and extending into and through said sidewall of said housing; wherein when said push-button is moved from an initial rest position toward a second generally opposite direction against said bias, a volume of said metering chamber is reduced to allow discharge of a metered dose of liquid product through said discharge orifice of said nozzle; and wherein said pressurized storage container includes a lower end having a removable container closure for retaining said piston, said removable container closure includes at least one release arm for retaining said piston in a first position, and said release arm further includes a detent engageable by a piston plug insertable in an opening in said piston to release said piston from said first position for pressurizing liquid disposed within said sealed chamber.