Patent ID: 8394644

Claim:
A method for delivering a desired fluid at a predetermined destination, said method comprising: providing a microfluidic osmotic pump including a surrounding compartment wherein an external surface of said surrounding compartment comprises a semi-permeable membrane, an osmotic agent contained within a fluid reservoir formed within the surrounding compartment, a compressible sac disposed within the fluid reservoir, and a fluid duct coupled to said compressible sac and ported through said surrounding compartment; exposing a microfluidic osmotic pump to a predetermined external fluid, wherein said predetermined external fluid permeates through said semi-permeable membrane; solvating said predetermined external fluid with said osmotic agent contained within the surrounding compartment resulting in a production of solvated osmotic agent; and developing an osmotic pressure within said surrounding compartment as said solvated osmotic agent is produced, wherein said pressure compresses said compressible sac housed within the fluid reservoir to pump out secondary fluid held within the compressible sac through said fluid duct to a desired destination; and pumping fluid out of said compressible sac as pressure is developed within said reservoir.