Electrochemical controlled dispensing assembly and method

Claim 1

A pump assembly for controlled delivery of a dispensing fluid comprising: a partition having a front surface and an opposite facing back surface, and defining an aperture extending from said front surface to said back surface; a driving reservoir formed for storing a driving fluid therein and in communication with said aperture for flow of said driving fluid through said partition; plug means disposed in said aperture in a manner preventing flow of said driving fluid through said partition; electric control means operably coupled to said plug means for controlling passage of said driving fluid through said aperture; barrier means defining a receiving reservoir and positioned relative to said aperture for receipt and containment of said driving fluid in said receiving reservoir as said driving fluid flows from said driving reservoir through said aperture, said barrier means separating said dispensing fluid and said driving fluid, and further formed to expand from a first volume toward an increased second volume in response to receipt of said driving fluid in said receiving reservoir; a dispensing reservoir for holding said dispensing fluid therein, said dispensing reservoir defining an orifice for release of said dispensing fluid therethrough, said barrier means being mounted for movement in said dispensing reservoir in a manner communicating with said dispensing fluid to urge said dispensing fluid through said orifice as said barrier means moves toward said increased second volume; and means for temporarily increasing the flow of the driving fluid to the receiving reservoir so as to deliver a temporarily increased flow of the dispensing fluid through the orifice.