Patent ID: 8092664

Claim:
A valving system comprising: a channel fluidly coupled to a first reservoir and a second reservoir; a volume in fluid communication with said channel; a fluidic obstruction configured to be included in the volume, wherein the fluidic obstruction is configured to move to a first position and a second position, wherein the fluidic obstruction is configured to block the channel to prevent fluid communication between the first and second reservoir when the fluidic obstruction is in the second position, and wherein the fluidic obstruction is a fluid selected from a liquid droplet and a gas bubble; a first electrode proximate to said volume; a second electrode proximate to said channel, wherein said first and second electrodes are proximate to each other; and a power source electrically coupled to the first and second electrode, the power source being configured to provide an electrical potential difference at the interface between the electrode and the fluidic obstruction sufficient to provide a net force to move the fluidic obstruction within the volume.