Patent ID: 8343443

Claim:
A micro-fluidic device, comprising: a body defining first, second and third pneumatic ports, each sealed with a seal and shaped to couple to a pneumatic conduit through said seal; a first chamber for receiving a first liquid, having a first top opening and a first bottom opening, said first top opening in fluid communication with said first port; a second chamber for receiving a second liquid, having a second top opening and a second bottom opening, said second top opening in fluid communication with said second port; a third chamber for receiving a third liquid, having a third top opening and a third bottom opening, said third top opening in fluid communication with said third port; and a connecting conduit above each one of said first, second and third bottom openings, said bottom openings in fluid communication with one another through said connecting conduit, wherein selective application of pneumatic pressures to said chambers through said pneumatic conduits transfers a liquid from one of said chambers to another one of said chambers through said connecting conduit.