Patent ID: 8037902

Claim:
A fluid logic device comprising: a first flow channel; a first bulk fluid flow gate in fluid communication with the first flow channel; a second bulk fluid flow gate in communication with the first bulk fluid flow gate; a third bulk fluid flow gate in fluid communication with the first bulk fluid flow gate, the first bulk fluid flow gate, the second bulk fluid flow gate, and the third bulk fluid flow gate each comprising a first entry port for introducing bulk fluid into a first chamber, a first exit port for exiting of bulk fluid from the first chamber, a second entry port positioned between the first entry port and the first exit port, the second entry port for introducing sample into the first chamber, and a second exit port, in which bulk fluid introduced through the first entry port experiences substantially greater hydrodynamic resistance at the first exit port than at the second exit port; the first exit port of the first bulk fluid flow gate being in fluid communication with the second entry port of the third bulk fluid flow gate; and means for generating an electric field in electrical communication with the first bulk fluid flow gate and means for generating an electric field in electrical communication with the second bulk fluid flow gate.