초록

This invention describes a method for pumping or delivering fluids utilizing a flexible vessel subject to controlled pressures within another pressure vessel. The pressure vessel can be sourced with positive and/or negative (e.g., vacuum) pressure.

대표청구항 ▼

1. A method for providing substantially stable flow of a biological fluid, comrising:providing a sealed flexible chamber adapted to contain fluid disposed within an outer chamber, wherein said sealed flexible chamber comprises a fluid path between said sealed flexible chamber and the exterior of sai

1. A method for providing substantially stable flow of a biological fluid, comrising:providing a sealed flexible chamber adapted to contain fluid disposed within an outer chamber, wherein said sealed flexible chamber comprises a fluid path between said sealed flexible chamber and the exterior of said outer chamber and wherein said outer chamber is adapted to provide a space containing a pressure sensitive medium around said sealed flexible chamber; providing means for continuously increasing or decreasing the pressure in a uniform and controlled manner within said space around said sealed flexible chamber; and changing the pressure with in said space around said sealed flexible chamber such that fluid is displaced into or out of said sealed flexible chamber in a uniform and controlled manner, wherein said method does not substantially damage said biological fluid.